TY - JOUR
T1 - Non-local harmonic current and reactive power compensation for a multi-microgrid system using a series-shunt network device
AU - John, Thomas
AU - Patsios, Charalampos
AU - Greenwood, David
N1 - Funding Information:
The work in this paper was supported by the Engineering and Physical Sciences Research Council (EPSRC) under grant no. EP/ N032888/1.
Publisher Copyright:
© 2020 The Institution of Engineering and Technology.
PY - 2020/12/4
Y1 - 2020/12/4
N2 - In this study, a new non-local active compensation method is developed for a multi-microgrid (MMG) system. The current industry practice is to utilise local harmonic current and reactive power compensation methods, however, local compensation methods are not practical for large MMG system with widely dispersed non-linear loads, because each non-linear load would require its own compensator. To overcome this problem, a novel compensating technology called a series-shunt network device (SSND) is installed between a pair of microgrids in the proposed MMG system. The SSND reduces the number of local compensators required while also performing additional functions in comparison with conventional devices. For effective control of the SSND, an improved model predictive control (MPC) algorithm, which gives better tracking accuracy and faster setpoint change than that of a conventional proportional-integral controller, is also presented. Analysis and simulations verify the capability of SSND in performing both local and non-local active compensation of harmonic current and reactive power in the proposed MMG system under various test scenarios. Simulation results show that the MPC-controlled SSND can achieve effective compensation, thereby resulting in a very low current total harmonic distortion value of 2.4% and a unity power factor at the distribution grid side.
AB - In this study, a new non-local active compensation method is developed for a multi-microgrid (MMG) system. The current industry practice is to utilise local harmonic current and reactive power compensation methods, however, local compensation methods are not practical for large MMG system with widely dispersed non-linear loads, because each non-linear load would require its own compensator. To overcome this problem, a novel compensating technology called a series-shunt network device (SSND) is installed between a pair of microgrids in the proposed MMG system. The SSND reduces the number of local compensators required while also performing additional functions in comparison with conventional devices. For effective control of the SSND, an improved model predictive control (MPC) algorithm, which gives better tracking accuracy and faster setpoint change than that of a conventional proportional-integral controller, is also presented. Analysis and simulations verify the capability of SSND in performing both local and non-local active compensation of harmonic current and reactive power in the proposed MMG system under various test scenarios. Simulation results show that the MPC-controlled SSND can achieve effective compensation, thereby resulting in a very low current total harmonic distortion value of 2.4% and a unity power factor at the distribution grid side.
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U2 - 10.1049/iet-gtd.2019.1675
DO - 10.1049/iet-gtd.2019.1675
M3 - Article (journal)
AN - SCOPUS:85095739654
SN - 1751-8687
VL - 14
SP - 5655
EP - 5666
JO - IET Generation, Transmission and Distribution
JF - IET Generation, Transmission and Distribution
IS - 23
ER -