含基于PI控制受端二次调频的特高压直流虚拟同步控制策略

doi:10.11930/j.issn.1004-9649.202105025

中国电力 ›› 2022, Vol. 55 ›› Issue (11): 66-72.DOI: 10.11930/j.issn.1004-9649.202105025

含基于PI控制受端二次调频的特高压直流虚拟同步控制策略

郭小龙¹, 张江飞², 亢朋朋¹, 杨桂兴¹, 孙谊媊¹, 袁铁江², 刘勇³

1. 国网新疆电力有限公司，新疆乌鲁木齐 830002;
2. 大连理工大学电气工程学院，辽宁大连 116024;
3. 安徽正广电电力技术有限公司，安徽合肥 230088

收稿日期:2021-05-08 修回日期:2021-06-05 发布日期:2022-11-29
作者简介:郭小龙（1983—），男，硕士，工程师，从事电力系统调度运行及分析研究，Email：1983@sina.com;张江飞（1998—），男，通信作者，硕士研究生，从事储能技术与新能源发电并网技术研究，Email：z_jiangfei@163.com;袁铁江（1975—），男，博士，教授，从事大规模储能与新能源发电并网技术、风/光-氢（储能）-煤/油综合供能技术研究，Email：xjuytj@163.com
基金资助:
国家自然科学基金资助项目（51577163）。

Virtual Synchronization Control Strategy for UHVDC with Secondary Frequency Modulation Based on PI Control

GUO Xiaolong¹, ZHANG Jiangfei², KANG Pengpeng¹, YANG Guixing¹, SUN Yiqian¹, YUAN Tiejiang², LIU Yong³

1. State Grid Xinjiang Electric Power Co., Ltd., Urumqi 830002, China;
2. School of Electrical Engineering, Dalian University of Technology, Dalian 116024, China;
3. Anhui Zhengguangdian Electric Power Technology Co., Ltd., Hefei 230088, China

Received:2021-05-08 Revised:2021-06-05 Published:2022-11-29
Supported by:
This work is supported by National Natural Science Foundation of China (No.51577163).

摘要/Abstract

摘要： 在传统控制策略下，特高压直流（ultra high voltage direct current, UHVDC）输电系统缺乏惯性和阻尼特征，不能响应交流系统频率变化。针对上述问题，首先，提出一种基于虚拟同步发电机（virtual synchronous generator，VSG）技术的UHVDC输电系统双端换流站控制策略，该方法保留了同步发电机转动惯量和阻尼系数2个关键参数；其次，改进了虚拟转子中频率的计算方法，并加入了基于PI控制器的受端二次调频环节；最后，针对负荷突变情况，在Matlab/Simulink中搭建了一个双端VSG系统模型进行仿真。结果表明，该控制策略具有惯性和阻尼特征，能够减小频率波动幅度、速度和超调量，抑制直流系统电压波动，同时实现频率的无差调节。

关键词: 特高压直流输电, 虚拟同步发电机, 转动惯量, 阻尼系数, 直流电压控制, 二次调频

Abstract: Under traditional control strategy, UHVDC transmission system lacks inertia and damping characteristics, so it can't effectively adjust the frequency of AC system dynamically. In order to solve this problem, a VSG (virtual synchronous generator)-based control strategy for UHVDC converter stations is proposed, in which two key parameters, including synchronous generator rotational inertia and damping coefficient, are retained. Meanwhile, the calculation method for frequency in virtual rotor is improved, and the PI controller-based secondary frequency regulation is added. Aiming at the situation of load mutation, a two-terminal VSG system model is built for simulation with Matlab/Simulink. The results show that the proposed control strategy has the characteristics of inertia and damping, which can reduce the amplitude, speed and overshoot of frequency fluctuation, suppress the voltage fluctuation of DC system, and realize isochronous control of frequency.

Key words: UHVDC, virtual synchronous generator, rotational inertia, damping coefficient, DC voltage control, secondary frequency modulation

郭小龙, 张江飞, 亢朋朋, 杨桂兴, 孙谊媊, 袁铁江, 刘勇. 含基于PI控制受端二次调频的特高压直流虚拟同步控制策略[J]. 中国电力, 2022, 55(11): 66-72.

GUO Xiaolong, ZHANG Jiangfei, KANG Pengpeng, YANG Guixing, SUN Yiqian, YUAN Tiejiang, LIU Yong. Virtual Synchronization Control Strategy for UHVDC with Secondary Frequency Modulation Based on PI Control[J]. Electric Power, 2022, 55(11): 66-72.

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含基于PI控制受端二次调频的特高压直流虚拟同步控制策略

Virtual Synchronization Control Strategy for UHVDC with Secondary Frequency Modulation Based on PI Control

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含基于PI控制受端二次调频的特高压直流虚拟同步控制策略

Virtual Synchronization Control Strategy for UHVDC with Secondary Frequency Modulation Based on PI Control

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