Cooperative robust operation control method of multi-VSG available for low- and medium-voltage distribution network

被引：0
|
作者：
Zhang C. [1 ]
Dou X. [1 ]
He G. [2 ]
Yang D. [2 ]
机构：
[1] School of Electrical Engineering, Southeast University, Nanjing
[2] NARI Group Corporation(State Grid Electric Power Research Institute), Nanjing
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2020年 / 40卷 / 09期
基金：
中国国家自然科学基金;
关键词：
Cooperative operation of multi-generator; Low- and medium-voltage distribution network; Power coup-ling; Robust control; Virtual synchronous generator;
D O I：
10.16081/j.epae.202009034
中图分类号：
学科分类号：
摘要：
As a new power grid friendly operation control method, VSG(Virtual Synchronous Generator) is generally integrated to distribution network in a decentralized way with multiple low- and medium-voltage nodes. There are many kinds of uncertainties and multi-generator cooperative operation control problems, which pose a certain challenge to the security and stability control of distribution network. For this reason, a cooperative robust operation control method of multi-VSG available for low- and medium-voltage distribution network is proposed, which mainly discusses the problems of bus voltage tracking, active power sharing among multiple generators, uncertainties of power coupling caused by line impedance parameter uncertainties of low- and medium-voltage distribution network, output uncertainties of system equipment, and so on. The uncertain power coupling is transformed into model uncertainties by establishing the VSG grid-connected model. Considering the possible problems of unknown topology and high order of model in low- and medium-voltage distribution network, a multi-VSG grid-connected cooperative control model is established by directly expanding the bus voltage state and the average power distribution state of multiple generators. The feedback controller of the whole system is designed by using robust control theory to suppress the influence of uncer-tain power coupling inside the model and uncertain output of external equipment on the control performance. The effectiveness of the proposed method is verified by the simulation model in MATLAB/Simulink. © 2020, Electric Power Automation Equipment Press. All right reserved.
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页码：64 / 71
页数：7
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