基于整流器无功功率控制的暂态电压抑制策略  

TRANSIENT VOLTAGE FLUCTUATION SUPPRESSION STRATEGY BASED ON RECTIFIER REACTIVE POWER CONTROL

作　　者：秦艳辉 尹纯亚 段青熙 马星 Qin Yanhui;Yin Chunya;Duan Qingxi;Ma Xing(School of Electrical Engineering,Southeast University,Nanjing 210096,China;State Grid Xinjiang Electric Power Research Institute,Urumqi 830011,China;School of Electrical Engineering,Xinjiang University,Urumqi 830017,China)

机构地区：[1]东南大学电气工程学院,南京210096 [2]国网新疆电力有限公司电力科学研究院,乌鲁木齐830011 [3]新疆大学电气工程学院,乌鲁木齐830017

出　　处：《太阳能学报》2024年第8期86-93,共8页Acta Energiae Solaris Sinica

基　　金：新疆维吾尔自治区自然科学基金(2022D01C363);新疆维吾尔自治区教育厅项目(XJEDU2022P019)。

摘　　要：针对高压直流输电系统换相失败引起送端换流母线电压波动的问题,首先推导送端换流母线电压与整流侧直流电压、直流电流之间的数学关系,分析得出换相失败及恢复期间直流电压与直流电流变化不协调是引起送端换流母线电压波动的主要原因。为抑制换流母线电压波动,基于整流器无功消耗与电压间定量分析,以换流母线耐压水平为约束,确定整流器无功消耗的期望值,并结合整流器无功特性分析,确定换相失败及恢复期间直流电流指令值补偿量,提出基于整流器无功功率控制的电压波动抑制策略。最后基于PSCAD/EMTDC仿真平台验证了电压波动机理的正确性以及抑制策略的有效性。In response to the problem of voltage fluctuation of the converter busbar at the sending end caused by the commutation failure in the high-voltage direct current transmission system,the mathematical relationship between the voltage of the converter busbar at the sending end and the DC voltage and DC current at the rectifier side is first derived.It is concluded that the main reason for the voltage fluctuation of the converter busbar at the sending end is the uncoordinated change of the DC voltage and DC current during the commutation failure and recovery period.To suppress voltage fluctuations in the converter bus,based on quantitative analysis between the reactive power consumption of the rectifier and the voltage,the expected value of the reactive power consumption of the rectifier is determined using the converter bus withstand voltage level as a constraint.Combined with the analysis of the rectifier′s reactive power characteristics,the compensation amount for the direct current command value during communication failure and recovery period is determined.A voltage fluctuation suppression strategy based on rectifier reactive power control is proposed.Finally,the correctness of and of the effectiveness of the voltage fluctuqtion suppression strategy are verified based on the PSCAD/EMTDC simulation platform.

关 键 词：高压直流输电 换相失败 无功功率 电压波动 整流器 

分 类 号：TK712[动力工程及工程热物理—流体机械及工程]