适用于交直流混联受端电网的电压弹性评估方法  

Voltage⁃resilience Assessment Method for AC/DC Hybrid Receiving⁃end Power Grid

作　　者：张宁宇 赵欣[3] 周前 陈哲 ZHANG Ningyu;ZHAO Xin;ZHOU Qian;CHEN Zhe(Jiangsu Electric Power Test Research Institute Co.,Ltd.,Nanjing 211103,China;State Grid Jiangsu Electric Power Co.,Ltd.Research Institute,Nanjing 211103,China;School of Electrical Engineering,Southeast University,Nanjing 210096,China)

机构地区：[1]江苏省电力试验研究院有限公司,南京211103 [2]国网江苏省电力有限公司电力科学研究院,南京211103 [3]东南大学电气工程学院,南京210096

出　　处：《高压电器》2023年第4期90-97,共8页High Voltage Apparatus

基　　金：国家自然科学基金资助项目(51707090);江苏省电力试验研究院有限公司项目(考虑极端故障的电力电子化电力系统弹性力评估技术研究)。

摘　　要：为精准、定量地计算交直流混联受端电网遭受短路故障后,电压恢复至正常运行水平的能力,提出了基于直流逆变站交流母线电压和熄弧角关键特征的受端电网电压弹性评估方法。首先,建立考虑多短路故障的交直流混联受端电网电压弹性评估模型,以故障后电压恢复标准为约束,提出同时计及逆变站交流母线电压和熄弧角变化特征的电压弹性评估指标;然后,基于潮流计算和机电暂态仿真实现上述评估模型的求解;最后,以江苏电网多种运行方式为例进行仿真验证,结果表明文中提出的方法可用于实际电网电压恢复能力的精准评估,并实现不同运行方式下电压弹性恢复力的量化计算。For accurately and quantitatively calculating the ability of the voltage recovers to normal operation level after the AC/DC hybrid receiving⁃end power grid suffers from short circuit fault,a kind of voltage⁃resilience assess⁃ment method of the receiving⁃end power grid based on key characteristic of AC busbar voltage and extinction angle of DC inverter station is proposed.Firstly,voltage⁃resilience assessment model of AC/DC hybrid receiving⁃end power grid considering multiple short circuit fault is set up.Then,with the voltage recovery standard after the fault as the constraints,the voltage⁃resilience assessment index considering simultaneously variation characteristic of AC busbar voltage and extinction angle of inverter station is proposed.After that,the solution of above assessment model is achieved on the basis of power flow calculation and electromechanical transient simulation.Finally,the multiple oper⁃ation modes of Jiangsu Power Grid is used as an example for simulation verification.The result shows that the method proposed in this paper can be used for precision assessment of voltage recovery ability of actual power grid,and can achieve the quantitative calculation of voltage⁃esilience recovery under different operation modes.

关 键 词：交直流混联电网 电压弹性 评估模型 熄弧角 

分 类 号：TM721.3[电气工程—电力系统及自动化]