柔性直流换流站内部暂态过电压数值模拟分析  

Numerical Simulation Analysis of Internal Transient Overvoltage in Flexible HVDC Converter Stations

作　　者：凌艺榕 农惠中 刘练文 LING Yirong;NONG Huizhong;LIU Lianwen(Baise Bureau of CSG EHV Power Transmission Company,Guangxi Baise 537300,China)

机构地区：[1]中国南方电网超高压输电公司百色局,广西百色537300

出　　处：《广西电力》2021年第5期53-56,63,共5页Guangxi Electric Power

摘　　要：针对传统电压数值模拟方法的模拟值与实际值存在一定误差的问题,提出柔性直流换流站内部暂态过电压数值模拟方法,构建柔性直流暂态过程中换流站的元件模型,近似等效各元件,提取模型参数,模拟换流站内部实际输电线路,得到由等值电感、换流站等值电容和等值电流源构成的等值电路,将额定电压作为等值电路的衡量标准,确定换流站内部的等值电势,计算暂态过电压,实现数值模拟。实验结果表明,此方法的模拟值更加接近真实值,降低了暂态过电压数值模拟误差。Aimed at solving the problem that there is an error between the actual value and the simulated value of the traditional voltage numerical simulation method.that,a numerical simulation method of internal transient overvoltage in flexible HVDC converter stations is proposed.By constructing the component models of the converter station in the flexible HVDC transient process,approximating equivalent components,extracting model parameters,and simulating the actual transmission line in the converter station,the equivalent circuit composed of the equivalent inductance and capacitance of the converter station and the equivalent current source is obtained.The rated voltage is taken as the measurement standard of the equivalent circuit,the equivalent potential in the converter station is determined,the transient overvoltage is calculated,and the numerical simulation is realized.The experimental results show that the simulation value of the method is closer to the actual value,and the numerical simulation error of transient overvoltage is reduced.

关 键 词：换流站 暂态过电压 无功功率 等值参数 

分 类 号：TM131[电气工程—电工理论与新技术]