Characteristic Analysis of UHVAC/DC Hybrid Power Grids and Construction of Power System Protection  

作　　者：Yinbiao Shu Guoping Chen Zhao Yu Jianyun Zhang Chao Wang Chao Zheng 

机构地区：[1]State Grid Corporation of China,Beijing 100031,China [2]China Electric Power Research Institute,Beijing 100192,China

出　　处：《CSEE Journal of Power and Energy Systems》2017年第4期325-333,共9页中国电机工程学会电力与能源系统学报（英文）

摘　　要：Strong DC coupling with weak AC and large-scale renewable energy integration are the two significant characteristics of ultra-high-voltage AC/DC(UHVAC/DC)hybrid power grids in China.Strong coupling between AC and DC grids and the different integration performance of renewable energy sources have profoundly changed the stability characteristics of the power system.The traditional stability control system is inadequate for the stability control of UHVAC/DC power grids.This paper analyzes the requirements for constructing an integrated defense system in a UHVAC/DC hybrid power grid(i.e.power system protection).The definition,connotation,and designing principles of power system protection are put forward.The relationship between the power system protection and the traditional three-defense lines is investigated.The design principles,general hardware structure and main functions of a power system protection are presented.Key problems and technologies are specified in the construction of the power system protection.

关 键 词：Design scheme general structure power system protection key technology renewable energy integration security and stability strong DC coupling with weak AC UHVAC/DC hybrid power grid 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]