电力建设2023，Vol.44Issue(12)：148-160,13.DOI:10.12204/j.issn.1000-7229.2023.12.013
常规直流送端近区电网中调相机和柔性直流的无功协调控制
Reactive Power-Coordinated Control of a Synchronous Condenser and VSC-HVDC in the Sending-Side Near Region Power Grid of an LCC-HVDC
摘要
Abstract
Commutation failure on the receiving side can be caused by a fault in the line commutated converter-based HVDC(LCC-HVDC)on the sending side,and an over-compensated reactive power increases the risk of commutation failure.In this paper,for a transmission system in which the sending-side LCC-HVDC is in parallel with a synchronous condenser and voltage source converter-based HVDC(VSC-HVDC),the reactive power control mechanisms and response characteristics of synchronous condenser and VSC-HVDC are discussed.We observe that the over-compensated reactive power of VSC-HVDC increases the risk of commutation failure of the LCC-HVDC,and the reactive power regulation capacity of the synchronous condenser is not fully utilized.Based on this,a reactive power-coordinated control scheme between the synchronous condenser and VSC-HVDC is proposed to accelerate the reactive power response of the VSC-HVDC,reduce the excess reactive power compensation to reduce the risk of commutation failure of the LCC-HVDC,and improve utilization of the reactive power regulation capacity of the synchronous condenser.Finally,simulation results of typical examples reveal that the proposed scheme can fully utilize the dynamic reactive power regulation capacity of the synchronous condenser,inhibit transient low voltage at the moment of fault,and reduce the risk of commutation failure after the fault is cleared.关键词
常规直流/送端/无功过补偿/换相失败/调相机/柔性直流/无功协调控制Key words
LCC-HVDC/sending side/over reactive power compensation/commutation failure/synchronous condenser/VSC-HVDC/reactive power coordinated control分类
信息技术与安全科学引用本文复制引用
李大虎,李佳,周悦,饶渝泽,周泓宇,姚伟..常规直流送端近区电网中调相机和柔性直流的无功协调控制[J].电力建设,2023,44(12):148-160,13.基金项目
This work is supported by National Natural Science Foundation of China(No.52022035)and Science and Technology Program of Hubei Electric Power Co.,Ltd.(No.52150521000W).国家自然科学基金项目(52022035) （No.52022035）
国网湖北省电力有限公司科技项目"面向多特高压直流馈入和新能源基地发展的湖北新型电力系统运行与控制关键技术研究"(52150521000W) （52150521000W）
