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Hysteresis-based energy management strategy for microgrid containing photovoltaic, ESS and heating loads is proposed in this study. In this real-time optimisation method, economic cost, operation cost, comfort level, renewable energy penetration and other performance indices are optimised in real time. To solve the complex energy management problem, when power forecasting is unavailable, different operational cases are clarified and calculated accordingly. In this way, the management process is turned into a finite-solution problem. Furthermore, a hysteresis loop is also established based on the cost function to optimise the system continuously, of which the loop width is offline designed. As a result, the computation burden is reduced. Finally, simulation results are presented to verify the effectiveness of the proposed energy management method. The application of the proposed method can reduce the economic cost and improve the operational performances of a microgrid significantly, including comfort, power quality and health of ESS.
Mingyu Lei; Lexuan Meng; Lidong Guo; Zilong Yang; Yibo Wang. Hysteresis‐based energy management strategy for a microgrid with controllable heating loads. IET Renewable Power Generation 2020, 14, 1340 -1348.
AMA StyleMingyu Lei, Lexuan Meng, Lidong Guo, Zilong Yang, Yibo Wang. Hysteresis‐based energy management strategy for a microgrid with controllable heating loads. IET Renewable Power Generation. 2020; 14 (8):1340-1348.
Chicago/Turabian StyleMingyu Lei; Lexuan Meng; Lidong Guo; Zilong Yang; Yibo Wang. 2020. "Hysteresis‐based energy management strategy for a microgrid with controllable heating loads." IET Renewable Power Generation 14, no. 8: 1340-1348.
This paper proposes a novel current control method based on Model Predictive Control (MPC) for three-phase inverters. The proposed method is based on an Adaptive MPC (A-MPC) with a PWM modulation. An innovative model parameter estimation and modification method is also proposed, leading to enhanced control accuracy. Comparing with traditional current control methods, such as PI and PR control, the proposed method has better dynamic performance. The transient dynamics, i.e., recovery time and overshoot, have been considerably improved. Simulation and experimental results are presented to validate the effectiveness of the proposal.
Mingyu Lei; Ying Zhang; Lexuan Meng; Yibo Wang; Zilong Yang; Dufeng Cao. A Novel Adaptive Model Predictive Control Based Three-Phase Inverter Current Control Method. Applied Sciences 2019, 9, 5413 .
AMA StyleMingyu Lei, Ying Zhang, Lexuan Meng, Yibo Wang, Zilong Yang, Dufeng Cao. A Novel Adaptive Model Predictive Control Based Three-Phase Inverter Current Control Method. Applied Sciences. 2019; 9 (24):5413.
Chicago/Turabian StyleMingyu Lei; Ying Zhang; Lexuan Meng; Yibo Wang; Zilong Yang; Dufeng Cao. 2019. "A Novel Adaptive Model Predictive Control Based Three-Phase Inverter Current Control Method." Applied Sciences 9, no. 24: 5413.
The transportation sector is undergoing electrification to gain advantages such as lighter weight, improved reliability, and enhanced efficiency. As contributors to the safety of embedded critical functions in electrified systems, better sizing of electric machines in vehicles is required to reduce the cost, volume, and weight. Although the designs of machines are widely investigated, existing studies are mostly complicated and application-specific. To satisfy the multi-level design requirements of power systems, this study aims to develop an efficient modeling method of electric machines with a background of aircraft applications. A variable-speed variable-frequency (VSVF) electrically excited synchronous generator is selected as a case study to illustrate the modular multi-physics modeling process, in which weight and power loss are the major optimization goals. In addition, multi-disciplinary design optimization (MDO) methods are introduced to facilitate the optimal variable selection and simplified model establishment, which can be used for the system-level overall design. Several cases with industrial data are analyzed to demonstrate the effectiveness and superior performance of the modeling method. The results show that the proposed practices provide designers with accurate, fast, and systematic means to develop models for the efficient design of aircraft power systems.
Zehua Dai; Li Wang; Lexuan Meng; Shanshui Yang; Ling Mao. Multi-Level Modeling Methodology for Optimal Design of Electric Machines Based on Multi-Disciplinary Design Optimization. Energies 2019, 12, 4173 .
AMA StyleZehua Dai, Li Wang, Lexuan Meng, Shanshui Yang, Ling Mao. Multi-Level Modeling Methodology for Optimal Design of Electric Machines Based on Multi-Disciplinary Design Optimization. Energies. 2019; 12 (21):4173.
Chicago/Turabian StyleZehua Dai; Li Wang; Lexuan Meng; Shanshui Yang; Ling Mao. 2019. "Multi-Level Modeling Methodology for Optimal Design of Electric Machines Based on Multi-Disciplinary Design Optimization." Energies 12, no. 21: 4173.
Lexuan Meng; Jawwad Zafar; Shafiuzzaman K. Khadem; Alan Collinson; Kyle C. Murchie; Federico Coffele; Graeme M. Burt. Fast Frequency Response From Energy Storage Systems—A Review of Grid Standards, Projects and Technical Issues. IEEE Transactions on Smart Grid 2019, 11, 1566 -1581.
AMA StyleLexuan Meng, Jawwad Zafar, Shafiuzzaman K. Khadem, Alan Collinson, Kyle C. Murchie, Federico Coffele, Graeme M. Burt. Fast Frequency Response From Energy Storage Systems—A Review of Grid Standards, Projects and Technical Issues. IEEE Transactions on Smart Grid. 2019; 11 (2):1566-1581.
Chicago/Turabian StyleLexuan Meng; Jawwad Zafar; Shafiuzzaman K. Khadem; Alan Collinson; Kyle C. Murchie; Federico Coffele; Graeme M. Burt. 2019. "Fast Frequency Response From Energy Storage Systems—A Review of Grid Standards, Projects and Technical Issues." IEEE Transactions on Smart Grid 11, no. 2: 1566-1581.
In multi-phase AC power systems, e.g. aircraft electric power systems (EPS), the proximity effect between the feeder cables can be severe and complex due to the tightly wired cable bundles. Simulation software is widely used to analyze such effects in order to guarantee proper system operation, but it is highly time consuming and requires extensive computational resources. Accordingly, this paper proposes an analytical calculation method for estimating the ac resistance of closely bundled power cables, namely multi-conductor cables. Simulation and experimental tests are performed to validate the effectiveness and accuracy of the method, showing that the algorithm developed in this paper is easy to implement with a minimum accuracy of 92% in all the tests. It allows online estimation of cable resistances, which can be beneficial for advanced system monitoring and management to enhance safety and reduce losses. Aircraft EPS and cables are used as the example in this paper, while the proposed method is also applicable for other applications, such as shipboard EPS, renewable energy parks, or microgrids where multi-conductor cables are used.
Yaojia Zhang; Li Wang; Lexuan Meng. An Analytical AC Resistance Calculation Method for Multiple-Conductor Feeder Cables in Aircraft Electric Power Systems. IEEE Transactions on Industrial Electronics 2019, 67, 3340 -3349.
AMA StyleYaojia Zhang, Li Wang, Lexuan Meng. An Analytical AC Resistance Calculation Method for Multiple-Conductor Feeder Cables in Aircraft Electric Power Systems. IEEE Transactions on Industrial Electronics. 2019; 67 (5):3340-3349.
Chicago/Turabian StyleYaojia Zhang; Li Wang; Lexuan Meng. 2019. "An Analytical AC Resistance Calculation Method for Multiple-Conductor Feeder Cables in Aircraft Electric Power Systems." IEEE Transactions on Industrial Electronics 67, no. 5: 3340-3349.
Since a dc Micro-Grid consists of power converters connected through different line impedances, tuning of the voltage controller provides a simple and intuitive tradeoff between the conflicting goals of voltage regulation and current power sharing. A highly flexible distributed control strategy is proposed to achieve balanced control between the two control objectives, which includes the containment-based voltage controller and consensus-based current controller. The terminal voltage can be bounded within a prescriptive range which means each terminal voltage is controllable instead of only controlling average voltages, meanwhile the current sharing performance can be regulated among converters. The two objectives, including either bounding voltages tightly or decreasing current sharing errors, can be compromised between each other by tuning controller weights. The large signal model is developed to analyze the tuning principle about different control parameters. The proposed strategy can provide flexible control performance according to various control requirements. Experimental results and comparisons are illustrated to verify the effectiveness of the proposed method and compromised tuning under resistive load and constant power load (CPL), dynamic voltage boundary conditions.
Renke Han; Haojie Wang; Zheming Jin; Lexuan Meng; Josep M. Guerrero. Compromised Controller Design for Current Sharing and Voltage Regulation in DC Microgrid. IEEE Transactions on Power Electronics 2018, 34, 8045 -8061.
AMA StyleRenke Han, Haojie Wang, Zheming Jin, Lexuan Meng, Josep M. Guerrero. Compromised Controller Design for Current Sharing and Voltage Regulation in DC Microgrid. IEEE Transactions on Power Electronics. 2018; 34 (8):8045-8061.
Chicago/Turabian StyleRenke Han; Haojie Wang; Zheming Jin; Lexuan Meng; Josep M. Guerrero. 2018. "Compromised Controller Design for Current Sharing and Voltage Regulation in DC Microgrid." IEEE Transactions on Power Electronics 34, no. 8: 8045-8061.
In this paper, we propose a secondary consensus-based control layer for current sharing and voltage balancing in DC microGrids (mGs). To this purpose, we assume that Distributed Generation Units (DGUs) are equipped with decentralized primary controllers guaranteeing voltage stability. This goal can be achieved using, for instance, Plug-and-Play (PnP) regulators, which allow one to analyze the behavior of the closed-loop mG by approximating local primary control loops with either unitary gains or first-order transfer functions. Besides proving exponential stability, current sharing, and voltage balancing, we describe how to design secondary controllers in a PnP fashion when DGUs are added or removed. Theoretical results are complemented by simulations, using a 7-DGUs mG implemented in Simulink/PLECS, and experiments on a 3-DGUs mG.
Michele Tucci; Lexuan Meng; Josep Guerrero; Giancarlo Ferrari-Trecate. Stable current sharing and voltage balancing in DC microgrids: A consensus-based secondary control layer. Automatica 2018, 95, 1 -13.
AMA StyleMichele Tucci, Lexuan Meng, Josep Guerrero, Giancarlo Ferrari-Trecate. Stable current sharing and voltage balancing in DC microgrids: A consensus-based secondary control layer. Automatica. 2018; 95 ():1-13.
Chicago/Turabian StyleMichele Tucci; Lexuan Meng; Josep Guerrero; Giancarlo Ferrari-Trecate. 2018. "Stable current sharing and voltage balancing in DC microgrids: A consensus-based secondary control layer." Automatica 95, no. : 1-13.
This study presents finite control set model predictive control (FCS-MPC) methods to eliminate leakage current for a three-level T-type transformerless photovoltaic (PV) inverter without any modification on topology or any hardware changes. The proposed FCS-MPC methods are capable of eliminating the leakage current in the transformerless PV system by applying the defined candidate voltage vector (VV) combinations with only six medium and one zero VVs (6MV1Z) or three large and three small VVs, which generate constant common-mode voltage to perform the optimisation in every control period. With fewer VVs used for the optimisation, the computational burden can be significantly reduced. Furthermore, comparative analysis is performed to show that among these proposed methods, the 6MV1Z method can achieve satisfactory performances in both grid current tracking and neutral point potentials balance control even with less number of candidate VVs, which exhibits the FCS-MPC as an alternative control strategy to be used in the grid-connected transformerless PV system. Finally, experiments are performed to validate the analysis and the effectiveness of the proposed methods.
Xiaodong Wang; Jianxiao Zou; Lan Ma; Jiancheng Zhao; Chuan Xie; Kai Li; Lexuan Meng; Josep M. Guerrero. Model predictive control methods of leakage current elimination for a three‐level T‐type transformerless PV inverter. IET Power Electronics 2018, 11, 1492 -1498.
AMA StyleXiaodong Wang, Jianxiao Zou, Lan Ma, Jiancheng Zhao, Chuan Xie, Kai Li, Lexuan Meng, Josep M. Guerrero. Model predictive control methods of leakage current elimination for a three‐level T‐type transformerless PV inverter. IET Power Electronics. 2018; 11 (8):1492-1498.
Chicago/Turabian StyleXiaodong Wang; Jianxiao Zou; Lan Ma; Jiancheng Zhao; Chuan Xie; Kai Li; Lexuan Meng; Josep M. Guerrero. 2018. "Model predictive control methods of leakage current elimination for a three‐level T‐type transformerless PV inverter." IET Power Electronics 11, no. 8: 1492-1498.
DC distribution is now becoming the major trend of future mobile power systems, such as more-electric aircrafts and ships. As dc distribution has different nature to the conventional ac system, a new design of well-structured control and management methods will be mandatory. In this paper, a shipboard power system with dc distribution and energy storage system (ESS) is picked as the study case. To meet the requirement of control and management of such a large-scale mobile power system, a hierarchical control design is proposed in this paper. In order to fully exploit the benefit of the ESS, as well as to overcome the limitation in controllability, a novel inverse-droop control method is proposed, in which the power sharing is according to the source characteristic, instead of their power rating. A frequency-division method is also proposed as an extension to the inverse-droop method for enabling a hybrid ESS and its autonomous operation. On the basis of the proposed methods, the control methods for management and voltage restoration levels are also proposed to establish a comprehensive control solution. Real-time simulations are carried out to validate the performance of the proposed control design under different operating conditions. When compared to more conventional droop-based approaches, the new proposal shows enhancement in efficiency.
Zheming Jin; Lexuan Meng; Josep M. Guerrero; Renke Han. Hierarchical Control Design for a Shipboard Power System With DC Distribution and Energy Storage Aboard Future More-Electric Ships. IEEE Transactions on Industrial Informatics 2017, 14, 703 -714.
AMA StyleZheming Jin, Lexuan Meng, Josep M. Guerrero, Renke Han. Hierarchical Control Design for a Shipboard Power System With DC Distribution and Energy Storage Aboard Future More-Electric Ships. IEEE Transactions on Industrial Informatics. 2017; 14 (2):703-714.
Chicago/Turabian StyleZheming Jin; Lexuan Meng; Josep M. Guerrero; Renke Han. 2017. "Hierarchical Control Design for a Shipboard Power System With DC Distribution and Energy Storage Aboard Future More-Electric Ships." IEEE Transactions on Industrial Informatics 14, no. 2: 703-714.
V. Boscaino; Josep Guerrero; Viorica Irina Ciornei; Lexuan Meng; Eleonora Riva Sanseverino; Gaetano Zizzo. Online optimization of a multi-conversion-level DC home microgrid for system efficiency enhancement. Sustainable Cities and Society 2017, 35, 417 -429.
AMA StyleV. Boscaino, Josep Guerrero, Viorica Irina Ciornei, Lexuan Meng, Eleonora Riva Sanseverino, Gaetano Zizzo. Online optimization of a multi-conversion-level DC home microgrid for system efficiency enhancement. Sustainable Cities and Society. 2017; 35 ():417-429.
Chicago/Turabian StyleV. Boscaino; Josep Guerrero; Viorica Irina Ciornei; Lexuan Meng; Eleonora Riva Sanseverino; Gaetano Zizzo. 2017. "Online optimization of a multi-conversion-level DC home microgrid for system efficiency enhancement." Sustainable Cities and Society 35, no. : 417-429.
Harmonics have been considered as one of the major issues in future power grids. With the increasing demand in advanced control functions, power electronic converter interfaced distributed generators (DGs) are expected to perform harmonic compensation when necessary. It has been demonstrated in a number of studies that DG converters operating in voltage-controlled mode can be easily configured to realize voltage harmonic compensation utilizing naturally embedded voltage control loop. While for DGs operating in current-controlled mode (CCM), such function was rarely studied. Considering that CCM is commonly used in renewable energy based generators and energy storage systems, it has certain significance to achieve the same function with CCM converters. Aiming at such objectives, this paper proposes a voltage detection based harmonic compensator (HC) for CCM converters. The novelty and main advantages of the proposed method include the following. It realizes seamless interface of HC with inner fundamental current control loop. Compared with a conventional active power filtering method, it does not require remote load harmonic current measurement since it is local voltage detection based. Compared with a conventional voltage detection based method, it offers better performance because of directly harmonic voltage regulation. Experimental results are presented to demonstrate the effectiveness of the method.
Xin Zhao; Lexuan Meng; Chuan Xie; Josep M. Guerrero; Xiaohua Wu; Juan C. Vasquez; Mehdi Savaghebi. A Voltage Feedback Based Harmonic Compensation Strategy for Current-Controlled Converters. IEEE Transactions on Industry Applications 2017, 54, 2616 -2627.
AMA StyleXin Zhao, Lexuan Meng, Chuan Xie, Josep M. Guerrero, Xiaohua Wu, Juan C. Vasquez, Mehdi Savaghebi. A Voltage Feedback Based Harmonic Compensation Strategy for Current-Controlled Converters. IEEE Transactions on Industry Applications. 2017; 54 (3):2616-2627.
Chicago/Turabian StyleXin Zhao; Lexuan Meng; Chuan Xie; Josep M. Guerrero; Xiaohua Wu; Juan C. Vasquez; Mehdi Savaghebi. 2017. "A Voltage Feedback Based Harmonic Compensation Strategy for Current-Controlled Converters." IEEE Transactions on Industry Applications 54, no. 3: 2616-2627.
One of the major feature of DC microgrids is its high penetration of power electronic converters, as a result, the system inertia becomes a problem. In this paper, an admittance-type droop control with additional capability of introducing virtual inertia to the system. With the proposed method, each energy source will also contribute virtual inertia to the system, thus improving transient response and stability of the entire DC microgrid. The inertia issue of droop control is firstly analyzed. A comparative study is carried out between conventional method (i.e. impedance-type droop control method) and the new proposal in terms of their different control principles, characteristics of equivalent output admittance/impedance, and effectiveness in achieving desired virtual inertia introduction. Ultimately, simulations and experiments are carried out to verify proposed control methods. The results show improved system inertia and enhanced performance.
Zheming Jin; Lexuan Meng; Renke Han; Josep Guerrero; Juan C. Vasquez. Admittance-type RC-mode droop control to introduce virtual inertia in DC microgrids. 2017 IEEE Energy Conversion Congress and Exposition (ECCE) 2017, 4107 -4112.
AMA StyleZheming Jin, Lexuan Meng, Renke Han, Josep Guerrero, Juan C. Vasquez. Admittance-type RC-mode droop control to introduce virtual inertia in DC microgrids. 2017 IEEE Energy Conversion Congress and Exposition (ECCE). 2017; ():4107-4112.
Chicago/Turabian StyleZheming Jin; Lexuan Meng; Renke Han; Josep Guerrero; Juan C. Vasquez. 2017. "Admittance-type RC-mode droop control to introduce virtual inertia in DC microgrids." 2017 IEEE Energy Conversion Congress and Exposition (ECCE) , no. : 4107-4112.
A highly flexible and reliable control strategy is proposed to achieve bounded voltage and precise current sharing, which is implemented in a reverse-droop-based dc Micro-Grid. To acquire the fast-dynamic response, the reverse droop control is used to replace the V-I droop control in the primary level. In the secondary level, the containment-based controller is proposed to bound the bus voltages within a reasonable range and keep the necessary voltage deviations for power flow regulation; the consensus-based controller is simultaneous involved to regulate power flow achieving accurate current sharing among converters. Combined the proposed controllers with the electrical part of the dc Micro-Grid, a model is fully developed to analyze the sensitivity of different control coefficients. Experimental results are presented to demonstrate the effectiveness of the proposed method.
Renke Han; Haojie Wang; Zheming Jin; Lexuan Meng; Josep M. Guerrero. Containment-based distributed coordination control to achieve both bounded voltage and precise current sharing in reverse-droop-based DC microgrid. 2017 IEEE Energy Conversion Congress and Exposition (ECCE) 2017, 4121 -4127.
AMA StyleRenke Han, Haojie Wang, Zheming Jin, Lexuan Meng, Josep M. Guerrero. Containment-based distributed coordination control to achieve both bounded voltage and precise current sharing in reverse-droop-based DC microgrid. 2017 IEEE Energy Conversion Congress and Exposition (ECCE). 2017; ():4121-4127.
Chicago/Turabian StyleRenke Han; Haojie Wang; Zheming Jin; Lexuan Meng; Josep M. Guerrero. 2017. "Containment-based distributed coordination control to achieve both bounded voltage and precise current sharing in reverse-droop-based DC microgrid." 2017 IEEE Energy Conversion Congress and Exposition (ECCE) , no. : 4121-4127.
Recently, DC distribution has been more and more considered in shipbuilding industry as an emerging solution due to its potential to enhance the system performance in terms of fuel economy, reliability, volume and weight. Moreover, there is a growing trend to integrate alternative power sources (APSs) and energy storage systems (ESSs) into next-generation ships, and thus reducing cost and emission. In this context, the future shipboard power systems (SPSs) are expected to be compatible with various generation methods and complex onboard power consumers, which can be naturally identified as islanding microgrids (MGs). In this paper, specialized hierarchical control strategy is proposed to coordinate the system operation and meet the requirement of shipboard applications. Several advantageous functions are achieved by proposed control strategy. A study case of DC SPS is modeled and simulations are carried out to verify the proposed control strategy.
Zheming Jin; Lexuan Meng; Juan C. Vasquez; Josep Guerrero. Specialized hierarchical control strategy for DC distribution based shipboard microgrids: A combination of emerging DC shipboard power systems and microgrid technologies. IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society 2017, 6820 -6825.
AMA StyleZheming Jin, Lexuan Meng, Juan C. Vasquez, Josep Guerrero. Specialized hierarchical control strategy for DC distribution based shipboard microgrids: A combination of emerging DC shipboard power systems and microgrid technologies. IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society. 2017; ():6820-6825.
Chicago/Turabian StyleZheming Jin; Lexuan Meng; Juan C. Vasquez; Josep Guerrero. 2017. "Specialized hierarchical control strategy for DC distribution based shipboard microgrids: A combination of emerging DC shipboard power systems and microgrid technologies." IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society , no. : 6820-6825.
The paper proposes a hybrid droop control strategy to enhance the stability and increase maximum constant power loads (CPLs) capability of DC microgrids in a realistic scenario. By capturing the detailed model of inner control loops and hybrid droop control and general dc MG topology, a thorough comparative study is conducted between traditional droop control and hybrid droop control. Enhanced control bandwidth and system stability margin are shown to illustrate the advantages of the proposal. CPL penetration is one of the critical consideration of this paper. The hybrid droop control can increase the maximum CPL power capability of the system. Simulation studies are conducted to verify the analysis results and the effectiveness of the method.
Renke Han; Lexuan Meng; Josep Guerrero. Hybrid droop control strategy applied to grid-supporting converters in DC microgrids: Modeling, design and analysis. IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society 2017, 268 -273.
AMA StyleRenke Han, Lexuan Meng, Josep Guerrero. Hybrid droop control strategy applied to grid-supporting converters in DC microgrids: Modeling, design and analysis. IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society. 2017; ():268-273.
Chicago/Turabian StyleRenke Han; Lexuan Meng; Josep Guerrero. 2017. "Hybrid droop control strategy applied to grid-supporting converters in DC microgrids: Modeling, design and analysis." IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society , no. : 268-273.
Energy storage systems (ESSs) are becoming indispensable components in electric power systems. They are used for energy scheduling, power/voltage smoothing, load shifting, as well as for emergency power supply. The most common control method for power/voltage smoothing is based on a high-pass-filter (HPF) structure. It generates the power reference according to the fluctuating power and provides a stabilization effect. The power and energy supplied by ESS are majorly configured by the cut-off frequency and gain of the HPF. Considering the operational limits on ESS state-of-charge (SoC), this paper proposes an adaptive cut-off frequency design method to realize communication-less and autonomous operation of a system with multiple distributed ESS. The experimental results demonstrate that the SoCs of all ESS units are kept within safe margins, while the SoC level and power of the paralleled units converge to the final state, providing a natural plug-and-play function.
Lexuan Meng; Tomislav Dragicevic; Josep M. Guerrero. Adaptive Control Design for Autonomous Operation of Multiple Energy Storage Systems in Power Smoothing Applications. IEEE Transactions on Industrial Electronics 2017, 65, 6612 -6624.
AMA StyleLexuan Meng, Tomislav Dragicevic, Josep M. Guerrero. Adaptive Control Design for Autonomous Operation of Multiple Energy Storage Systems in Power Smoothing Applications. IEEE Transactions on Industrial Electronics. 2017; 65 (8):6612-6624.
Chicago/Turabian StyleLexuan Meng; Tomislav Dragicevic; Josep M. Guerrero. 2017. "Adaptive Control Design for Autonomous Operation of Multiple Energy Storage Systems in Power Smoothing Applications." IEEE Transactions on Industrial Electronics 65, no. 8: 6612-6624.
Harmonics have been considered as one of the major issues in modern power grids. Considering the high penetration level of power electronic converter interfaced distributed generation (DG) units, it is of interest to provide ancillary services through DG interfacing converters, such as harmonic compensation. In that case, multiple DG interfacing converters are utilized to compensate harmonics, and the compensation effort should be properly shared among these converters. However, it is rarely considered in existing literatures that converters operating in different modes, such as voltage-controlled mode (VCM) and current-controlled mode (CCM), need to cooperatively provide the compensation function. Aiming at this objective, this paper proposes a unified voltage harmonic mitigation strategy for VCM and CCM converters with high harmonic current sharing accuracy. Another advantage of the proposal is that the grid-side and load-side current measurements are avoided, which reduces the implementation cost. Experimental results are presented to demonstrate the effectiveness of the method.
Xin Zhao; Lexuan Meng; Chuan Xie; Josep M. Guerrero; Xiaohua Wu. A Unified Voltage Harmonic Control Strategy for Coordinated Compensation With VCM and CCM Converters. IEEE Transactions on Power Electronics 2017, 33, 7132 -7147.
AMA StyleXin Zhao, Lexuan Meng, Chuan Xie, Josep M. Guerrero, Xiaohua Wu. A Unified Voltage Harmonic Control Strategy for Coordinated Compensation With VCM and CCM Converters. IEEE Transactions on Power Electronics. 2017; 33 (8):7132-7147.
Chicago/Turabian StyleXin Zhao; Lexuan Meng; Chuan Xie; Josep M. Guerrero; Xiaohua Wu. 2017. "A Unified Voltage Harmonic Control Strategy for Coordinated Compensation With VCM and CCM Converters." IEEE Transactions on Power Electronics 33, no. 8: 7132-7147.
A distributed nonlinear controller is presented to achieve both accurate current-sharing and voltage regulation simultaneously in dc microgrids (MGs) considering different line impedances effects among converters. Then, an improved event-triggered principle for the controller is introduced through combining the state-dependent tolerance with a nonnegative offset. In order to design the event-triggered principle and guarantee the global stability, a generalized dc MG model is proposed and proven to be positive definite, based on which Lyapunov-based approach is applied. Furthermore, considering the effects from constant power loads, the damping performance of proposed controller is further improved which is comparative with the traditional V-I droop controller. The proposed event-triggered-based communication strategy can considerably reduce the communication traffic and significantly relax the requirement for precise real-time information transmission, without sacrificing system performance. Experimental results obtained from a dc MG setup show the robustness of the new proposal under normal, communication failure and communication delay operation conditions. Finally, communication traffic under different communication strategies is compared, showing a drastic traffic reduction when using the proposed approach.
Renke Han; Lexuan Meng; Josep M. Guerrero; Juan C. Vasquez. Distributed Nonlinear Control With Event-Triggered Communication to Achieve Current-Sharing and Voltage Regulation in DC Microgrids. IEEE Transactions on Power Electronics 2017, 33, 6416 -6433.
AMA StyleRenke Han, Lexuan Meng, Josep M. Guerrero, Juan C. Vasquez. Distributed Nonlinear Control With Event-Triggered Communication to Achieve Current-Sharing and Voltage Regulation in DC Microgrids. IEEE Transactions on Power Electronics. 2017; 33 (7):6416-6433.
Chicago/Turabian StyleRenke Han; Lexuan Meng; Josep M. Guerrero; Juan C. Vasquez. 2017. "Distributed Nonlinear Control With Event-Triggered Communication to Achieve Current-Sharing and Voltage Regulation in DC Microgrids." IEEE Transactions on Power Electronics 33, no. 7: 6416-6433.
Lexuan Meng; Sanjay Chaudhary; Josep Guerrero. Customized power quality service provided by converter interfaced microgrids — Voltage harmonics as a study case. 2017 19th European Conference on Power Electronics and Applications (EPE'17 ECCE Europe) 2017, 1 .
AMA StyleLexuan Meng, Sanjay Chaudhary, Josep Guerrero. Customized power quality service provided by converter interfaced microgrids — Voltage harmonics as a study case. 2017 19th European Conference on Power Electronics and Applications (EPE'17 ECCE Europe). 2017; ():1.
Chicago/Turabian StyleLexuan Meng; Sanjay Chaudhary; Josep Guerrero. 2017. "Customized power quality service provided by converter interfaced microgrids — Voltage harmonics as a study case." 2017 19th European Conference on Power Electronics and Applications (EPE'17 ECCE Europe) , no. : 1.
This paper presents a novel distributed approach to achieve both bounded voltage and accurate reactive power sharing regulation in ac microgrid. The coupling/trade-off effects between bus voltages and reactive power sharing regulation are first analyzed in detail to provide a guideline for coordinated control design. Furthermore, a containment and consensus-based distributed coordination controller is proposed, by which the bus voltage magnitudes can be bounded within a reasonable range, instead of only controlling average voltage value. Furthermore, the accurate reactive power sharing between distributed generators can be achieved simultaneously. Then, a detailed small-signal model is developed to analyze the stability of the system and the sensitivity of different parameters. Experimental results are presented and compared, where the controller performance, robust performance under communication failure, and plug-and-play operation are successfully verified.
Renke Han; Lexuan Meng; Giancarlo Ferrari-Trecate; Ernane Coelho; Juan C. Vasquez; Josep M. Guerrero. Containment and Consensus-Based Distributed Coordination Control to Achieve Bounded Voltage and Precise Reactive Power Sharing in Islanded AC Microgrids. IEEE Transactions on Industry Applications 2017, 53, 5187 -5199.
AMA StyleRenke Han, Lexuan Meng, Giancarlo Ferrari-Trecate, Ernane Coelho, Juan C. Vasquez, Josep M. Guerrero. Containment and Consensus-Based Distributed Coordination Control to Achieve Bounded Voltage and Precise Reactive Power Sharing in Islanded AC Microgrids. IEEE Transactions on Industry Applications. 2017; 53 (6):5187-5199.
Chicago/Turabian StyleRenke Han; Lexuan Meng; Giancarlo Ferrari-Trecate; Ernane Coelho; Juan C. Vasquez; Josep M. Guerrero. 2017. "Containment and Consensus-Based Distributed Coordination Control to Achieve Bounded Voltage and Precise Reactive Power Sharing in Islanded AC Microgrids." IEEE Transactions on Industry Applications 53, no. 6: 5187-5199.