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This paper presents a proposal for potential bioelectrochemical power to gas stations. It consists of a two-level voltage source converter interfacing the electrical grid on the AC side and an electromethanogenesis based bioelectrochemical system (EMG-BES) working as a stacked module on the DC side. The proposed system converts CO2 and electrical energy into methane, using wastewater as the additional chemical energy input. This energy storage system can contribute to dampening the variability of renewables in the electrical network, provide even flexibility and grid services by controlling the active and reactive power exchanged and is an interesting alternative technology in the market of energy storage for big energy applications. The big challenge for controlling this system lays in the fact that the DC bus voltage of the converter has to be changed in order to regulate the exchanged active power with the grid. This paper presents a cascade approach to control such a system by means of combining external control loops with fast inner loops. The outer power loop, with a proportional-integral (PI) controller with special limitation values and anti-windup capability, is used to generate DC bus voltage reference. An intermediate loop is used for DC bus voltage regulation and current reference generation. A new proportional resonant controller is used to track the current reference. The proposed scheme has been validated through real-time simulation in OPAL OP4510.
Mahdi Shahparasti; Amirhossein Rajaei; Andres Tarraso; Jose Vidal Leon Romay; Alvaro Luna. Control and Validation of a Reinforced Power Conversion System for Upcoming Bioelectrochemical Power to Gas Stations. Electronics 2021, 10, 1470 .
AMA StyleMahdi Shahparasti, Amirhossein Rajaei, Andres Tarraso, Jose Vidal Leon Romay, Alvaro Luna. Control and Validation of a Reinforced Power Conversion System for Upcoming Bioelectrochemical Power to Gas Stations. Electronics. 2021; 10 (12):1470.
Chicago/Turabian StyleMahdi Shahparasti; Amirhossein Rajaei; Andres Tarraso; Jose Vidal Leon Romay; Alvaro Luna. 2021. "Control and Validation of a Reinforced Power Conversion System for Upcoming Bioelectrochemical Power to Gas Stations." Electronics 10, no. 12: 1470.
Nowadays, modern power converters installed in renewable power plants can provide flexible electromechanical characteristics that rely on the developed control technologies such as Synchronous Power Controller (SPC). Since high renewable penetrated power grids result in a low-inertia system, this electromechanical characteristic provides support to the dynamic stability of active power and frequency in the power generation area. This goal can be achieved through the proper tuning of virtual electromechanical parameters that are embedded in the control layers of power converters. In this paper, a novel mathematical pattern and strategy have been proposed to adjust dynamic parameters in Renewable Static Synchronous Generators controlled by SPC (RSSG-SPC). A detailed dynamic modeling was obtained for a feasible design of virtual damping coefficient and virtual moment of inertia in the electrometrical control layer of RSSG-SPC’s power converters. Mathematical solutions, modal analysis outcomes, time-domain simulation results, and real-time validations of the test in IEEE-14B benchmark confirm that the proposed method is an effective procedure for the dynamic design of RSSG-SPC to provide these dynamic stability supports in grid connection.
Mostafa Abdollahi; Jose Candela; Andres Tarraso; Mohamed Elsaharty; Elyas Rakhshani. Electromechanical Design of Synchronous Power Controller in Grid Integration of Renewable Power Converters to Support Dynamic Stability. Energies 2021, 14, 2115 .
AMA StyleMostafa Abdollahi, Jose Candela, Andres Tarraso, Mohamed Elsaharty, Elyas Rakhshani. Electromechanical Design of Synchronous Power Controller in Grid Integration of Renewable Power Converters to Support Dynamic Stability. Energies. 2021; 14 (8):2115.
Chicago/Turabian StyleMostafa Abdollahi; Jose Candela; Andres Tarraso; Mohamed Elsaharty; Elyas Rakhshani. 2021. "Electromechanical Design of Synchronous Power Controller in Grid Integration of Renewable Power Converters to Support Dynamic Stability." Energies 14, no. 8: 2115.
The variable and unpredictable behavior of renewable energies impacts the performance of power systems negatively, threatening their stability and hindering their efficient operation. Flexible ac transmission systems (FACTS) devices are able to emulate the connection of parallel and series impedances in the transmission system, which improves the regulation of power systems with a high share of renewables, avoiding congestions, enhancing their response in front of contingencies and, in summary, increasing their utilization and reliability. Proper control of voltage and current under distorted and unbalanced transient grid conditions is one of the most critical issues in the control of FACTS devices to emulate such apparent impedances. This paper describes how the synchronous power controller (SPC) can be used to implement virtually synchronous FACTS. It presents the SPC functionalities, emphasizing in particular the importance of virtual admittance emulation by FACTS devices in order to control transient unbalanced currents during faults and attenuate harmonics. Finally, the results demonstrate the effectiveness of SPC-based FACTS devices in improving power quality of electrical networks. This is a result of their contribution to voltage balancing at point of connection during asymmetrical faults and the improvement of grid voltage quality by controlling harmonics flow.
Andres Tarraso; Ngoc-Bao Lai; Gregory N. Baltas; Pedro Rodriguez. Power Quality Services Provided by Virtually Synchronous FACTS. Energies 2019, 12, 3292 .
AMA StyleAndres Tarraso, Ngoc-Bao Lai, Gregory N. Baltas, Pedro Rodriguez. Power Quality Services Provided by Virtually Synchronous FACTS. Energies. 2019; 12 (17):3292.
Chicago/Turabian StyleAndres Tarraso; Ngoc-Bao Lai; Gregory N. Baltas; Pedro Rodriguez. 2019. "Power Quality Services Provided by Virtually Synchronous FACTS." Energies 12, no. 17: 3292.