普侨特高压直流输电系统极测量系统结构分析及模拟量预处理方法

The Structure Analysis and the Method of Analog Preprocessing of the Pole Measurement System of Pu-qiao UHVDC Transmission System

与传统高压直流输电工程不同,云广和普侨特高压直流工程配置了独立的测量系统,主要包括阀组测量系统、极公共测量系统和极测量系统。经过预处理后的测量量在被控制、保护判断逻辑采用之前,仍需再次进行滤波处理。但是,在暂态过程中,切换TDM总线后,数据无法及时跟随实际采样值,易导致保护误动作。通过优化数据模块的参数,实现了输出量与输入量的快速响应功能。

Unlike traditional HVDC transmission projects,Yunguang and Puqiao UHVDC projects are equipped with independent measurement systems,which mainly include valve group measurement systems,pole public measurement systems,and pole measurement systems.The preprocessed measurement quantity still needs to be filtered again before being used by the control and protection judgment logic.However,in the transient process,after switching the TDM bus,the data cannot follow the actual sampled value in time,which may easily cause the protection malfunction.Therefore,by optimizing the parameters of the data module,the fast response function of the output and input is realized.