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This paper presents a scaling gain compensation method for current measurement of motor drive application under locked-rotor condition. In several applications such as elevators, cranes and so on, initial commissioning processes are performed under locked-rotor condition. To compensate the current scaling gain errors, the proposed method performs d-q axis current control according to two-phase sensing methods in the stationary reference frame. Thereafter, the three-phase scaling gains are estimated using the d-axis current command and the output d-axis voltage, and then, compensated. The proposed algorithm considers the inequality of the phase resistances so that the compensation performance can be improved. The validity of the proposed algorithm was verified through experiments.
Min-Sik Yoo; Young-Doo Yoon; Byung-Moon Han; Eun-Jea Park; Yun-Young Choi. Scaling Gain Compensation Method for Current Measurement of Motor Drive Applications Under Locked-Rotor Condition Considering Inequality of Each Phase Resistances. 2018 IEEE Energy Conversion Congress and Exposition (ECCE) 2018, 4564 -4569.
AMA StyleMin-Sik Yoo, Young-Doo Yoon, Byung-Moon Han, Eun-Jea Park, Yun-Young Choi. Scaling Gain Compensation Method for Current Measurement of Motor Drive Applications Under Locked-Rotor Condition Considering Inequality of Each Phase Resistances. 2018 IEEE Energy Conversion Congress and Exposition (ECCE). 2018; ():4564-4569.
Chicago/Turabian StyleMin-Sik Yoo; Young-Doo Yoon; Byung-Moon Han; Eun-Jea Park; Yun-Young Choi. 2018. "Scaling Gain Compensation Method for Current Measurement of Motor Drive Applications Under Locked-Rotor Condition Considering Inequality of Each Phase Resistances." 2018 IEEE Energy Conversion Congress and Exposition (ECCE) , no. : 4564-4569.
This paper proposes a new reactive-power sharing scheme to reduce the circulating current when two inverter-based distributed generations (DGs) operate in parallel through unequal line impedances in an islanded microgrid. If the terminal voltages of the two DGs are not equal due to the unequal line impedances, a circulating current due to reactive-power unbalance occurs, which increases system loss. The proposed droop control compensates the terminal voltage difference to reduce the circulating current by considering a feed-forward path of the line voltage drop. The feasibility of the proposed droop control was first verified through computer simulations, and then experiments with a hardware set-up in the lab. The experimental results were compared with the simulation results to confirm the feasibility of the proposed droop control.
Jae-Hyuk Kim; Yoon-Seok Lee; Hyun-Jun Kim; Byung-Moon Han. A New Reactive-Power Sharing Scheme for Two Inverter-Based Distributed Generations with Unequal Line Impedances in Islanded Microgrids. Energies 2017, 10, 1800 .
AMA StyleJae-Hyuk Kim, Yoon-Seok Lee, Hyun-Jun Kim, Byung-Moon Han. A New Reactive-Power Sharing Scheme for Two Inverter-Based Distributed Generations with Unequal Line Impedances in Islanded Microgrids. Energies. 2017; 10 (11):1800.
Chicago/Turabian StyleJae-Hyuk Kim; Yoon-Seok Lee; Hyun-Jun Kim; Byung-Moon Han. 2017. "A New Reactive-Power Sharing Scheme for Two Inverter-Based Distributed Generations with Unequal Line Impedances in Islanded Microgrids." Energies 10, no. 11: 1800.
This paper proposes an offset voltage control scheme for the modular multilevel converter (MMC) operated in nearest level control (NLC) to improve the total harmonic distortion (THD) of AC phase voltages. The offset (neutral-to-zero-point) voltage is adjusted so that the magnitude of each AC pole voltage maintains constant value with N + 1 level in the range of whole modulation index (MI). The validity of the proposed scheme was confirmed by computer simulations for the MMC with 22.9 kV/25 MVA and experimental works for the scaled MMC with 380 V/10 kVA. It was confirmed that the proposed control scheme can generate linearly variable AC phase voltages with improved THD in the over-modulation region as well as the normal-modulation region.
Jae-Hyuk Kim; Do-Hyun Kim; Byung-Moon Han. Offset Voltage Control Scheme for Modular Multilevel Converter Operated in Nearest Level Control. Energies 2017, 10, 863 .
AMA StyleJae-Hyuk Kim, Do-Hyun Kim, Byung-Moon Han. Offset Voltage Control Scheme for Modular Multilevel Converter Operated in Nearest Level Control. Energies. 2017; 10 (7):863.
Chicago/Turabian StyleJae-Hyuk Kim; Do-Hyun Kim; Byung-Moon Han. 2017. "Offset Voltage Control Scheme for Modular Multilevel Converter Operated in Nearest Level Control." Energies 10, no. 7: 863.
Modular Multi-level Converter (MMC) has been widely researched in order to apply it for the back-to-back (BTB) high voltage direct current (HVDC) system. This paper proposes a new pre-charging scheme for the sub-module capacitors of MMC that is operated in nearest level control (NLC) modulation. The proposed scheme does not require any additional circuit or pulse width modulation (PWM) technique. The feasibility of proposed scheme was verified through computer simulations and experiments for a 3-phase 10kVA MMC with 12 sub-modules per each arm. The proposed scheme could be directly applied for the actual MMC-based HVDC system.
Jae-Hyuk Kim; Yoon-Seok Lee; Byung-Moon Han. New pre-charging scheme for MMC-based back-to-back HVDC system operated in nearest level control. 2017 IEEE 3rd International Future Energy Electronics Conference and ECCE Asia (IFEEC 2017 - ECCE Asia) 2017, 1445 -1450.
AMA StyleJae-Hyuk Kim, Yoon-Seok Lee, Byung-Moon Han. New pre-charging scheme for MMC-based back-to-back HVDC system operated in nearest level control. 2017 IEEE 3rd International Future Energy Electronics Conference and ECCE Asia (IFEEC 2017 - ECCE Asia). 2017; ():1445-1450.
Chicago/Turabian StyleJae-Hyuk Kim; Yoon-Seok Lee; Byung-Moon Han. 2017. "New pre-charging scheme for MMC-based back-to-back HVDC system operated in nearest level control." 2017 IEEE 3rd International Future Energy Electronics Conference and ECCE Asia (IFEEC 2017 - ECCE Asia) , no. : 1445-1450.
This letter proposes a new scheme of smooth operation transition for the stand-alone power system which is composed of engine generator (EG) and battery energy storage system (BESS) with photo voltaic (PV) panels. The proposed scheme offers smooth operation transition of BESS controller from the current control to the voltage control and vice versa. The feasibility of proposed scheme was verified through experiments with a scaled prototype.
Hyun-Jun Kim; Eun-Suk Shin; Yoon-Seok Lee; Jae-Hyuk Kim; Byung Moon Han. Smooth Operation Transition Scheme for Stand-Alone Power System With EG and BESS-PV Panels. IEEE Transactions on Smart Grid 2017, 8, 2042 -2044.
AMA StyleHyun-Jun Kim, Eun-Suk Shin, Yoon-Seok Lee, Jae-Hyuk Kim, Byung Moon Han. Smooth Operation Transition Scheme for Stand-Alone Power System With EG and BESS-PV Panels. IEEE Transactions on Smart Grid. 2017; 8 (4):2042-2044.
Chicago/Turabian StyleHyun-Jun Kim; Eun-Suk Shin; Yoon-Seok Lee; Jae-Hyuk Kim; Byung Moon Han. 2017. "Smooth Operation Transition Scheme for Stand-Alone Power System With EG and BESS-PV Panels." IEEE Transactions on Smart Grid 8, no. 4: 2042-2044.
This paper proposes a new seamless operation scheme for a stand-alone power system, which has a battery energy storage system (BESS), photo voltaic (PV) panels, and an engine generator (EG) to supply electric power to the customers in remote islands. The proposed scheme offers smooth operation change of the BESS from the current control to the voltage control or vice versa when the EG is connected or disconnected to the load. The feasibility of proposed scheme was verified through computer simulations and experiments with a scaled prototype. It was confirmed that the proposed scheme offers a seamless operation with a simple approach to reduce the usage of EG in a stand-alone power system.
Byung-Moon Han; Jae-Hyuk Kim. New seamless operation scheme for stand-alone power system with EG and BESS-PV panel. 2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC) 2017, 1 -5.
AMA StyleByung-Moon Han, Jae-Hyuk Kim. New seamless operation scheme for stand-alone power system with EG and BESS-PV panel. 2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC). 2017; ():1-5.
Chicago/Turabian StyleByung-Moon Han; Jae-Hyuk Kim. 2017. "New seamless operation scheme for stand-alone power system with EG and BESS-PV panel." 2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC) , no. : 1-5.
Najam Ul Hassan; Yoon-Jae Kim; Byung-Moon Han; Jun-Young Lee. A Hybrid DC/DC Converter for EV OBCs Using Full-bridge and Resonant Converters with a Single Transformer. Journal of Power Electronics 2017, 17, 11 -19.
AMA StyleNajam Ul Hassan, Yoon-Jae Kim, Byung-Moon Han, Jun-Young Lee. A Hybrid DC/DC Converter for EV OBCs Using Full-bridge and Resonant Converters with a Single Transformer. Journal of Power Electronics. 2017; 17 (1):11-19.
Chicago/Turabian StyleNajam Ul Hassan; Yoon-Jae Kim; Byung-Moon Han; Jun-Young Lee. 2017. "A Hybrid DC/DC Converter for EV OBCs Using Full-bridge and Resonant Converters with a Single Transformer." Journal of Power Electronics 17, no. 1: 11-19.
Improved Pre-charging Method for MMC-Based HVDC Systems Operated in Nearest Level Control High voltage direct current (HVDC) systems;Modular multilevel converter (MMC);Nearest level control (NLC);Pre-charging method;Sub-module (SM) capacitors; Recently the researches on modular multi-level converter (MMC) are being highlighted because high quality and efficient power transmission have become key issues in high voltage direct current (HVDC) systems. This paper proposes an improved pre-charging method for the sub-module (SM) capacitor of MMC-based HVDC systems, which operates in the nearest level control (NLC) modulation and does not need additional circuits or pulse width modulation (PWM) techniques. The feasibility of the proposed method was verified through computer simulations for a scaled 3-phase 10kVA MMC with 12 SMs per each arm. Hardware experiments with a scaled prototype have also been performed in the lab to confirm the simulation results.
Kyo-Min Kim; Jae-Hyuk Kim; Do-Hyun Kim; Byung-Moon Han; Jun-Young Lee. Improved Pre-charging Method for MMC-Based HVDC Systems Operated in Nearest Level Control. Journal of Power Electronics 2017, 17, 127 -135.
AMA StyleKyo-Min Kim, Jae-Hyuk Kim, Do-Hyun Kim, Byung-Moon Han, Jun-Young Lee. Improved Pre-charging Method for MMC-Based HVDC Systems Operated in Nearest Level Control. Journal of Power Electronics. 2017; 17 (1):127-135.
Chicago/Turabian StyleKyo-Min Kim; Jae-Hyuk Kim; Do-Hyun Kim; Byung-Moon Han; Jun-Young Lee. 2017. "Improved Pre-charging Method for MMC-Based HVDC Systems Operated in Nearest Level Control." Journal of Power Electronics 17, no. 1: 127-135.
This paper proposes an identification method for induction motor parameters at standstill using integral calculations. The rotor time constant and magnetizing inductance are identified. During the identification process, the induction motor to be tested is consistently excited according to a predetermined current reference. Using the predetermined current, the induction motor emulates the rated rotor flux and the rated slip condition, even at standstill. This method is based on an integral calculation so that the results are robust to measurement noise. Based on these features, the identification result of the proposed method is quite accurate, and the method shows excellent repeatability. Due to the simplicity of the proposed technique, this method can be easily applied to commercial inverter products. Simulation and experimental results confirm the effectiveness of the proposed method.
Sang-Hoon Lee; Anno Yoo; Hak-Jun Lee; Young-Doo Yoon; Byung-Moon Han. Identification of Induction Motor Parameters at Standstill Based on Integral Calculation. IEEE Transactions on Industry Applications 2017, 53, 2130 -2139.
AMA StyleSang-Hoon Lee, Anno Yoo, Hak-Jun Lee, Young-Doo Yoon, Byung-Moon Han. Identification of Induction Motor Parameters at Standstill Based on Integral Calculation. IEEE Transactions on Industry Applications. 2017; 53 (3):2130-2139.
Chicago/Turabian StyleSang-Hoon Lee; Anno Yoo; Hak-Jun Lee; Young-Doo Yoon; Byung-Moon Han. 2017. "Identification of Induction Motor Parameters at Standstill Based on Integral Calculation." IEEE Transactions on Industry Applications 53, no. 3: 2130-2139.
This paper proposes a new DC output voltage control for a battery energy storage system (BESS) with a lithium-ion battery based on the state of charge (SoC). The proposed control scheme was verified through computer simulations for a typical stand-alone DC microgrid, which consists of a BESS, photovoltaic (PV) panel, engine generator (EG), and DC load. A scaled hardware prototype for a stand-alone DC microgrid was set up in the lab, in which the proposed control scheme was loaded in a DSP controller. The experimental results were compared with the simulation results for performance verification. The proposed control scheme provides relatively lower variation of the DC grid voltage than the conventional droop control.
Seung-Yeong Yu; Hyun-Jun Kim; Jae-Hyuk Kim; Byung-Moon Han. SoC-Based Output Voltage Control for BESS with a Lithium-Ion Battery in a Stand-Alone DC Microgrid. Energies 2016, 9, 924 .
AMA StyleSeung-Yeong Yu, Hyun-Jun Kim, Jae-Hyuk Kim, Byung-Moon Han. SoC-Based Output Voltage Control for BESS with a Lithium-Ion Battery in a Stand-Alone DC Microgrid. Energies. 2016; 9 (11):924.
Chicago/Turabian StyleSeung-Yeong Yu; Hyun-Jun Kim; Jae-Hyuk Kim; Byung-Moon Han. 2016. "SoC-Based Output Voltage Control for BESS with a Lithium-Ion Battery in a Stand-Alone DC Microgrid." Energies 9, no. 11: 924.
New Pre-charging Method for Modular Multi-level Converter Operated in Nearest Level Control Modulation Modular multilevel converter (MMC);Sub-module (SM) capacitor;High voltage direct current (HVDC) system;Nearest level control (NLC) modulation;Pre-charging method; Recently the researches on Modular Multi-level Converter (MMC) are being highlighted because high quality and efficient power transmission are key issues in the High Voltage Direct Current (HVDC) transmission system. This paper proposes an improved pre-charging method for the sub-module capacitors in MMC that operates in Nearest Level Control (NLC) modulation. The proposed method does not require additional circuits or Pulse Width Modulation (PWM) techniques. The feasibility of proposed method was verified through computer simulations for a scaled 3-phase 10kVA MMC with 12 sub-modules per each arm. Hardware experiments with a scaled prototype were performed in the lab to confirm the simulation results.
Kyo-Min Kim; Jae-Hyuk Kim; Do-Hyun Kim; Byung-Moon Han. New Pre-charging Method for Modular Multi-level Converter Operated in Nearest Level Control Modulation. The Transactions of The Korean Institute of Electrical Engineers 2016, 65, 1655 -1663.
AMA StyleKyo-Min Kim, Jae-Hyuk Kim, Do-Hyun Kim, Byung-Moon Han. New Pre-charging Method for Modular Multi-level Converter Operated in Nearest Level Control Modulation. The Transactions of The Korean Institute of Electrical Engineers. 2016; 65 (10):1655-1663.
Chicago/Turabian StyleKyo-Min Kim; Jae-Hyuk Kim; Do-Hyun Kim; Byung-Moon Han. 2016. "New Pre-charging Method for Modular Multi-level Converter Operated in Nearest Level Control Modulation." The Transactions of The Korean Institute of Electrical Engineers 65, no. 10: 1655-1663.
This paper describes a prototype of modularized three-phase semiconductor transformer that was developed in the lab for feasibility study. The developed prototype is composed of three units of single-phase semiconductor transformer coupled in Y-connection. Each single-phase unit has multiple units of high-voltage high-frequency resonant AC–DC converter, a low-voltage hybrid-switching DC–DC converter, and a low-voltage hybrid-switching DC–AC inverter. Also, each single-phase unit has two digital signal processor (DSP) boards to control converter operation and to acquire monitoring data. The monitoring system was developed based on LabView by using controller area network (CAN) communication between the DSP board and the personal computer (PC). Through diverse experimental analyses it was verified that the prototype operates with proper performance under normal and sag conditions. The developed prototype confirms the possibility of fabricating a commercial high-voltage high-power semiconductor transformer by increasing the number of series-connected converter modules in high-voltage side and improving the system efficiency with a new switching device such as an SiC device.
Do-Hyun Kim; Byung-Moon Han; Jun-Young Lee. Modularized Three-Phase Semiconductor Transformer with Bidirectional Power Flow for Medium Voltage Application. Energies 2016, 9, 668 .
AMA StyleDo-Hyun Kim, Byung-Moon Han, Jun-Young Lee. Modularized Three-Phase Semiconductor Transformer with Bidirectional Power Flow for Medium Voltage Application. Energies. 2016; 9 (9):668.
Chicago/Turabian StyleDo-Hyun Kim; Byung-Moon Han; Jun-Young Lee. 2016. "Modularized Three-Phase Semiconductor Transformer with Bidirectional Power Flow for Medium Voltage Application." Energies 9, no. 9: 668.
Won-Mo Yang; Hyun-Jun Kim; Byung-Moon Han. Droop Control to Compensate Load Voltage Unbalance for Inverter-based Distributed Generations with Unequal Impedance Lines. The Transactions of The Korean Institute of Electrical Engineers 2016, 65, 1193 -1203.
AMA StyleWon-Mo Yang, Hyun-Jun Kim, Byung-Moon Han. Droop Control to Compensate Load Voltage Unbalance for Inverter-based Distributed Generations with Unequal Impedance Lines. The Transactions of The Korean Institute of Electrical Engineers. 2016; 65 (7):1193-1203.
Chicago/Turabian StyleWon-Mo Yang; Hyun-Jun Kim; Byung-Moon Han. 2016. "Droop Control to Compensate Load Voltage Unbalance for Inverter-based Distributed Generations with Unequal Impedance Lines." The Transactions of The Korean Institute of Electrical Engineers 65, no. 7: 1193-1203.
NeW Output Voltage Control Scheme Based on SoC Variation of BESS Applicable for Stand-alone DC Microgrid Stand-alone DC microgrid;Droop control;State-of-Charge(SoC);Photo-Voltaic(PV) panel;Engine Generator(EG);Battery Energy Storage System(BESS); This paper proposes a new output voltage control scheme based on the SoC variation of the battery energy storage system (BESS) applicable for the stand-alone DC microgrid. The proposed control scheme provides relatively lower variation of the DC grid voltage than the conventional droop method. The performance of proposed control scheme was verified through computer simulations for a typical stand-alone DC microgrid which consists of BESS, photo-voltaic (PV) panel, engine generator (EG), and DC load. A scaled hardware prototype for the stand-alone DC microgrid with DSP controller was set up in the lab, and the proposed control algorithm was installed in the DSP controller. The test results were compared with the simulation results for performance verification and actual system implementation.
Seung-Yeong Yu; Hyun-Jun Kim; Byung-Moon Han. NeW Output Voltage Control Scheme Based on SoC Variation of BESS Applicable for Stand-alone DC Microgrid. The Transactions of The Korean Institute of Electrical Engineers 2016, 65, 1176 -1185.
AMA StyleSeung-Yeong Yu, Hyun-Jun Kim, Byung-Moon Han. NeW Output Voltage Control Scheme Based on SoC Variation of BESS Applicable for Stand-alone DC Microgrid. The Transactions of The Korean Institute of Electrical Engineers. 2016; 65 (7):1176-1185.
Chicago/Turabian StyleSeung-Yeong Yu; Hyun-Jun Kim; Byung-Moon Han. 2016. "NeW Output Voltage Control Scheme Based on SoC Variation of BESS Applicable for Stand-alone DC Microgrid." The Transactions of The Korean Institute of Electrical Engineers 65, no. 7: 1176-1185.
On remote islands photovoltaic (PV) panels with battery energy storage systems (BESSs) supply electric power to customers in parallel operation with engine generators (EGs) to reduce fuel consumption and environmental burden. A BESS operates in voltage control mode when it supplies power to loads alone, while it operates in current control mode when it supplies power to loads in parallel with the EG. This paper proposes a smooth mode change of the BESS from current control to voltage control by using initial value at the output of integral part in the voltage controller, and a smooth mode change from voltage control to current control by tracking the EG output voltage to the BESS output voltage using a phase-locked loop (PLL). The feasibility of the proposed scheme was verified through computer simulations and experiments with a scaled prototype.
Hyun-Jun Kim; Yoon-Seok Lee; Byung-Moon Han; Young-Doo Yoon. New Scheme for Seamless Operation for Stand-Alone Power Systems. Energies 2016, 9, 457 .
AMA StyleHyun-Jun Kim, Yoon-Seok Lee, Byung-Moon Han, Young-Doo Yoon. New Scheme for Seamless Operation for Stand-Alone Power Systems. Energies. 2016; 9 (6):457.
Chicago/Turabian StyleHyun-Jun Kim; Yoon-Seok Lee; Byung-Moon Han; Young-Doo Yoon. 2016. "New Scheme for Seamless Operation for Stand-Alone Power Systems." Energies 9, no. 6: 457.
Yong-Hee Park; Do-Hyun Kim; Jae-Hyuk Kim; Byung-Moon Han. A New Scheme for Nearest Level Control with Average Switching Frequency Reduction for Modular Multilevel Converters. Journal of Power Electronics 2016, 16, 522 -531.
AMA StyleYong-Hee Park, Do-Hyun Kim, Jae-Hyuk Kim, Byung-Moon Han. A New Scheme for Nearest Level Control with Average Switching Frequency Reduction for Modular Multilevel Converters. Journal of Power Electronics. 2016; 16 (2):522-531.
Chicago/Turabian StyleYong-Hee Park; Do-Hyun Kim; Jae-Hyuk Kim; Byung-Moon Han. 2016. "A New Scheme for Nearest Level Control with Average Switching Frequency Reduction for Modular Multilevel Converters." Journal of Power Electronics 16, no. 2: 522-531.
This paper proposes a half-bridge voltage balancer with a new controller for bipolar DC distribution systems. The proposed control scheme consists of two cascaded Proportional Integral (PI) controls rather than one PI control for balancing the pole voltage. In order to confirm the excellence of voltage balancing performance, a typical bipolar DC distribution system including a half-bridge voltage balancer with proposed controller was analyzed by computer simulations. Experiments with a scaled prototype were also carried out to confirm the simulation results. The half-bridge voltage balancer with proposed controller shows better performance than the half-bridge voltage balancer with one PI control for balancing the pole voltage.
Byung-Moon Han. A Half-Bridge Voltage Balancer with New Controller for Bipolar DC Distribution Systems. Energies 2016, 9, 182 .
AMA StyleByung-Moon Han. A Half-Bridge Voltage Balancer with New Controller for Bipolar DC Distribution Systems. Energies. 2016; 9 (3):182.
Chicago/Turabian StyleByung-Moon Han. 2016. "A Half-Bridge Voltage Balancer with New Controller for Bipolar DC Distribution Systems." Energies 9, no. 3: 182.
The microgrid and demand response (DR) are important technologies for future power grids. Among the variety of microgrid operations, the multi-agent system (MAS) has attracted considerable attention. In a microgrid with MAS, the agents installed on the microgrid components operate optimally by communicating with each other. This paper proposes an operation algorithm for the individual agents of a test microgrid that consists of a battery energy storage system (BESS) and an intelligent load. A microgrid central controller to manage the microgrid can exchange information with each agent. The BESS agent performs scheduling for maximum benefit in response to the electricity price and BESS state of charge (SOC) through a fuzzy system. The intelligent load agent assumes that the industrial load performs scheduling for maximum benefit by calculating the hourly production cost. The agent operation algorithm includes a scheduling algorithm using day-ahead pricing in the DR program and a real-time operation algorithm for emergency situations using emergency demand response (EDR). The proposed algorithm and operation strategy were implemented both by a hardware-in-the-loop simulation test using OPAL-RT and an actual hardware test by connecting a new distribution simulator.
Hee-Jun Cha; Dong-Jun Won; Sang-Hyuk Kim; Il-Yop Chung; Byung-Moon Han. Multi-Agent System-Based Microgrid Operation Strategy for Demand Response. Energies 2015, 8, 14272 -14286.
AMA StyleHee-Jun Cha, Dong-Jun Won, Sang-Hyuk Kim, Il-Yop Chung, Byung-Moon Han. Multi-Agent System-Based Microgrid Operation Strategy for Demand Response. Energies. 2015; 8 (12):14272-14286.
Chicago/Turabian StyleHee-Jun Cha; Dong-Jun Won; Sang-Hyuk Kim; Il-Yop Chung; Byung-Moon Han. 2015. "Multi-Agent System-Based Microgrid Operation Strategy for Demand Response." Energies 8, no. 12: 14272-14286.
Seamless Transfer Method of BESS Connected by Engine Generator BESS(Battery energy storage system);Stand-alone;PLL synchronization;Seamless transfer; In remote islands PV (Photo Voltaic) panel with BESS (Battery Energy Storage System) supplies electric power to the customers in parallel operation with EG (Engine Generator) to save fuel consumption and to mitigate environmental load. BESS operates in voltage control mode when it supplies power to the load alone, while it operates in current control mode when it supplies power to the load in parallel with EG. This paper proposes a smooth mode change scheme from current control to voltage control of BESS by adding proper initial value to the integral part of voltage control, and a smooth mode change scheme from voltage control to current control by tracking the EG output voltage to the BESS output voltage using PLL (Phase-Locked Loop). The feasibility of proposed schemes was verified through computer simulations with PSCAD/EMTDC, and the feasibility of actual hardware system was verified by experiments with scaled prototype. It was confirmed that the proposed schemes offer a seamless operation in the stand-alone power system in remote islands.
Eun-Suk Shin; Hyun-Jun Kim; Kyo-Min Kim; Seung-Yeong Yu; Byung-Moon Han. Seamless Transfer Method of BESS Connected by Engine Generator. The Transactions of The Korean Institute of Electrical Engineers 2015, 64, 1709 -1717.
AMA StyleEun-Suk Shin, Hyun-Jun Kim, Kyo-Min Kim, Seung-Yeong Yu, Byung-Moon Han. Seamless Transfer Method of BESS Connected by Engine Generator. The Transactions of The Korean Institute of Electrical Engineers. 2015; 64 (12):1709-1717.
Chicago/Turabian StyleEun-Suk Shin; Hyun-Jun Kim; Kyo-Min Kim; Seung-Yeong Yu; Byung-Moon Han. 2015. "Seamless Transfer Method of BESS Connected by Engine Generator." The Transactions of The Korean Institute of Electrical Engineers 64, no. 12: 1709-1717.
This paper proposes an active islanding detection method for the BESS (Battery Energy Storage System) with a three-phase inverter which is connected to the unbalanced AC grid. The proposed method adopts the DDSRF (Decoupled Double Synchronous Reference Frame) PLL (Phase-Locked Loop) so that the independent control of positive-sequence and negative-sequence current is successfully carried out using the detected phase angle information. The islanding state can be detected by sensing the variation of negative-sequence voltage due to the injection of 2-3% negative-sequence current from the BESS. The proposed method provides secure and rapid detection under the sag and swell of AC grid voltage. The feasibility of the proposed method was verified by computer simulations with PSCAD/EMTDC and experiments with a 5kW hardware set-up, considering the test circuit of islanding detection suggested by IEEE 1547 and UL1741.
Hyun-Jun Kim; Do-Hyun Kim; Byung-Moon Han. Islanding detection method with negative-sequence current injection under unbalanced grid voltage. 2015 IEEE 2nd International Future Energy Electronics Conference (IFEEC) 2015, 1 -6.
AMA StyleHyun-Jun Kim, Do-Hyun Kim, Byung-Moon Han. Islanding detection method with negative-sequence current injection under unbalanced grid voltage. 2015 IEEE 2nd International Future Energy Electronics Conference (IFEEC). 2015; ():1-6.
Chicago/Turabian StyleHyun-Jun Kim; Do-Hyun Kim; Byung-Moon Han. 2015. "Islanding detection method with negative-sequence current injection under unbalanced grid voltage." 2015 IEEE 2nd International Future Energy Electronics Conference (IFEEC) , no. : 1-6.