Novel Var Compensator Based on Dual-rotary Phase-shifting Transformers and Its Dual-loop Control Strategy

被引：0
|
作者：
Yan X. [1 ]
Deng W. [1 ]
Peng W. [1 ]
Jia J. [1 ]
Shao C. [1 ]
Li T. [2 ]
机构：
[1] Hebei Key Laboratory of Distributed Energy Storage and Microgrid (North China Electric Power University), Hebei Province, Baoding
[2] State Grid Hebei Electric Power Research Institute, Hebei Province, Shijiazhuang
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2023年 / 43卷 / 22期
关键词：
compensation adjustment control mechanism; double closed loop decoupling control; instantaneous reactive power theory; novel rotary var compensator (NRVC); rotary phase shifting transformer;
D O I：
10.13334/j.0258-8013.pcsee.221562
中图分类号：
学科分类号：
摘要：
With the continuous increase in the penetration rate of distributed power sources with random fluctuation characteristics and the acceleration of the urban cableization rate, the phenomenon of excess reactive power and overvoltage in the active distribution is obvious, which puts forward higher requirements for the economy, reliability and precise control capabilities of dynamic reactive power compensators. This paper proposes a novel rotary var compensator (NRVC) topology circuit based on current source converter static synchronous compensator and combined with the continuous regulation characteristics of the dual rotary phase-shifting transformers. A steady-state mathematical model of NRVC is constructed. The compensation regulation mechanism and capacity constraint relationship of NRVC are analyzed in detail. A reactive power compensation control strategy based on instantaneous reactive power theory is proposed aiming at the structural characteristics of NRVC. The power outer loop can accurately control the power factor, and the current inner loop is added to the limiting link to effectively prevent overcurrent and improve reliability. The simulation and experimental results verify the effectiveness of the proposed topology and its control strategy, NRVC can adjust compensated reactive power bidirectionally and continuously, and it also has the advantages of high adjustment accuracy as well as low harmonic distortion rate. ©2023 Chin.Soc.for Elec.Eng.
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页码：8821 / 8832
页数：11
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