| 引用本文: | 金砚秋,张哲任,严铭,徐政.结合阀侧STATCOM的电容换相换流拓扑及基本控制策略[J].电力自动化设备,2025,45(5):177-184. |
| JIN Yanqiu,ZHANG Zheren,YAN Ming,XU Zheng.Topology and basic control strategy of capacitor commutated converter combined with STATCOM on valve side[J].Electric Power Automation Equipment,2025,45(5):177-184. |
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| 摘要: |
| 在新型电力系统背景下，为了改善基于电网换相换流器的传统直流输电技术无功功率消耗大、在弱电网中容易换相失败等问题，提出了结合阀侧静止同步补偿器(STATCOM)和电容换相换流器(CCC)的换流拓扑(简称为SCCC换流拓扑)及其基本控制策略。阐明了SCCC的拓扑结构，推导了SCCC阀侧的数学模型；提出了SCCC阀侧STATCOM的控制策略，设计了基于解耦双同步坐标系的正、负序控制器，提出了基于直接电流补偿控制的动态无功补偿和有源滤波方法；研究了STATCOM容量的选取方法以及CCC的控制策略。在PSCAD/EMTDC中搭建基于SCCC的直流输电系统的电磁暂态仿真模型，仿真结果表明：阀侧STATCOM能够为换流站提供动态无功补偿和交流滤波，SCCC能够在弱电网中稳定运行且具有较好的故障穿越能力。 |
| 关键词: 高压直流输电 电容换相换流器 静止同步补偿器 直接电流补偿 控制策略 |
| DOI：10.16081/j.epae.202412003 |
| 分类号:TM721.1 |
| 基金项目: |
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| Topology and basic control strategy of capacitor commutated converter combined with STATCOM on valve side |
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JIN Yanqiu, ZHANG Zheren, YAN Ming, XU Zheng
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Department of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
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| Abstract: |
| In the context of new power system, to address the issues of high reactive power consumption and susceptibility to commutation failure in weak power grids of the traditional line commutated converter-based high voltage direct current transmission technology, a commutation topology combining a static synchronous compensator(STATCOM) on valve side and a capacitor commutated converter(CCC),which is called SCCC commutation topology for short, and its fundamental control strategy are proposed. The topology structure of SCCC is explained and the SCCC valve side mathematical model is derived. The control strategy of STATCOM on SCCC valve side is proposed, and the positive and negative sequence controllers based on decoupled double synchronous reference frame are designed. The dynamic reactive power compensation and active filter method based on direct current compensation control is proposed. The selection method of STATCOM capacity and the control strategy of CCC are studied. The electromagnetic transient simulation model of the direct current transmission system based on SCCC is built in PSCAD/EMTDC. The simulative results show that STATCOM on the valve side can provide dynamic reactive power compensation and AC filtering for the converter station, and SCCC can operate stably in weak power grid with good fault ride-through capability. |
| Key words: high voltage direct current transmission capacitor commutated converter STATCOM direct current compensation control strategy |
