电工技术学报  2016, Vol. 31 Issue (13): 111-119    DOI:
电力系统及其自动化 |
基于虚拟同步发电机控制的VSC类同调等值方法
李承昱,许建中,赵成勇,刘炜
新能源电力系统国家重点实验室华北电力大学 北京 102206
Coherency Equivalence Method for Voltage Source Converter Based onVirtual Synchronous Generator
Li Chengyu,Xu Jianzhong,Zhao Chengyong,Liu Wei
State Key Laboratory of Alternate Electrical Power System With Renewable Energy Sources North China Electric Power University Beijing 102206 China
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摘要 针对含有采用虚拟同步发电机控制(VSG)策略的电压源型换流器(VSC)的电网,开展其局部的电磁暂态仿真等值方法研究。分析了VSC具有同步发电机特性后的功角特性在电网等值中的可行性。类比交流同调性判别的方法,设计了适合于VSC的类同调判据,提出了基于虚拟同步发电机控制的VSC参数聚合方法。在PSCAD/EMTDC仿真环境下搭建了基于虚拟同步发电机控制的VSC并联运行模型,划分了内部区域和外部区域。基于系统在单相接地故障扰动下各VSC的虚拟功角曲线,判断了其类同调性,划分了不同的类同调VSC群,并分别进行了参数聚合。最后对比了等值前、后的外部区域对内部区域的输出有功、无功曲线,误差分析结果表明等值前、后VSC群的潮流基本不变,从而验证了所提基于虚拟同步控制的VSC群类同调等值方法的正确性和有效性。
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李承昱
许建中
赵成勇
刘炜
关键词 虚拟同步发电机VSC等值同调等值参数聚合    
Abstract:This research is focusing on conducting partial equivalence method for the power grid which operates with voltage source converter (VSC) based on the virtual synchronous generator (VSG) control strategy.The feasibility of applying power grid equivalence method in VSC with synchronous generator power-angle characteristic features has been analyzed.Then, on the analogy of AC coherency-based method, a VSC type coherency criterion has been designed and a VSC parameter aggregation method based on virtual synchronous generator control has been put forward.Under PSCAD/EMTDC simulated environment, VSCs parallel operation model is built based on virtual synchronous generator control.This system is divided into internal area and external area.Based on the virtual power-angle curve after single-phase ground fault disturbance, the VSCs coherency is judged and divided them into different coherent groups.Each group is proceeded parameter aggregation respectively.Finally, the output curve of active and reactive power from external area to internal area is chosen as object.Based on comparing the output curve before and after equivalence, the error analysis result indicates that the power flow is invariant during the equivalence.This validates the correctness and effectiveness of the referred coherency equivalence method.
Key wordsVirtual synchronous generator    VSC equivalence    coherency equivalent    parameter aggregation   
收稿日期: 2015-06-23      出版日期: 2016-07-15
PACS: TM74  
基金资助:国家自然科学基金 (51177042)、国家高技术研究发展(863)计划 (2013AA050105)和中央高校基本科研业务专项资金(2015XS08)资助项目。
作者简介: 李承昱 男,1991年生,博士研究生,研究方向为柔性直流输电。E-mail:lichengyu0216@foxmail.com(通信作者);许建中 男,1987年生,博士,讲师,研究方向为柔性直流输电。E-mail:xujianzhong@ncepu.edu.cn
引用本文:   
李承昱,许建中,赵成勇,刘炜. 基于虚拟同步发电机控制的VSC类同调等值方法[J]. 电工技术学报, 2016, 31(13): 111-119. Li Chengyu,Xu Jianzhong,Zhao Chengyong,Liu Wei. Coherency Equivalence Method for Voltage Source Converter Based onVirtual Synchronous Generator. Transactions of China Electrotechnical Society, 2016, 31(13): 111-119.
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