两类逆变侧控制策略对系统电压与直流主回路设计影响  

Effect of Two Inverter-side Control Strategies on System Voltage and DC Main Circuit Design

作　　者：黄勇[1] HUANG Yong(State Grid Corporation of China,Beijing 100032,China)

机构地区：[1]国家电网公司,北京100032

出　　处：《电力系统及其自动化学报》2018年第8期87-92,共6页Proceedings of the CSU-EPSA

基　　金：国家电网公司科技项目

摘　　要：针对高压直流输电工程逆变站通常采用的定关断角与定电压两类控制策略对系统电压与直流主回路设计的影响进行研究。首先从控制系统原理入手,分析了逆变侧定电压与定关断角两种控制策略的逻辑区别;然后利用电力系统分析计算软件PSD-BPA,模拟了换流站投切滤波器分组的实际工况,明确了两种控制策略在系统电压调节特性方面的差异;最后基于某实际高压直流工程的系统条件和运行参数,借助实时数字仿真系统,校核了定电压与定关断角两种控制策略下系统电压的暂态与稳态恢复特性,进一步验证了相关结论。在此基础上,研究并论证了两种控制策略对于直流换流站无功补偿容量、额定空载直流电压等直流主回路设计基本结论以及主要设备参数的影响。For an inverter station in a high voltage direct current(HVDC)transmission project,constant-extinction-angle-control and constant-voltage-control strategies are usually adopted.In this paper,the effect of these two control strategies on system voltage and DC main circuit design is studied.First,based on the principle of control system,the logic difference between the two inverter-side control strategies are analyzed.Then,PSD-BPA is used to simulate the working condition when switching filter banks in the converter station,and the differences in the system’s voltage regulation characteristics are specified under the two control strategies.Finally,according to the system condition and operation parameters of one real HVDC project,real-time digital simulation(RTDS)system is used to check the voltage recovery characteristics in the transient and steady states under the two control strategies,which further verifies the corresponding conclusions.On this basis,the effect of these two control strategies on the basic conclusions for the DC main circuit design(e.g.,reactive compensation capacity and rated no-load DC voltage of the DC converter station),as well as the main device parameters,is analyzed and verified.

关 键 词：高压直流输电 定电压控制 定关断角控制 实时数字仿真系统 直流主回路设计 

分 类 号：TM72[电气工程—电力系统及自动化]