多直流馈入背景下的河南电压稳定分析及改善措施研究  

Study on voltage stability analysis and improvement measures for Henan province with a background of multiple DC feeding

作　　者：边宏宇 潘晓杰 刘芳冰 高泽 黄畅想 吕鹏 BIAN Hongyu;PAN Xiaojie;LIU Fangbing;GAO Ze;HUANG Changxiang;Lü Peng(Central China Branch of China State Grid Corp,Wuhan 430077,China;State Grid Henan Electric Power Research Institute,Zhengzhou 450052,China;NARI Group Corporation,Nanjing 210000,China;Beijing Kedong Electric Power Control System Co.,Ltd.,Beijing 100192,China)

机构地区：[1]国家电网公司华中分部,湖北武汉430077 [2]国网河南省电力科学研究院,河南郑州450052 [3]南瑞集团,江苏南京210000 [4]北京科东电力控制系统有限公司,北京100192

出　　处：《电力系统保护与控制》2020年第21期125-131,共7页Power System Protection and Control

基　　金：国家电网有限公司科技项目资助(521700190010)“电化学储能电站群在特高压交直流混联受端电网应用关键技术研究及示范”。

摘　　要：为提高西北电网清洁能源消纳能力和华中电网供电能力,青海—河南特高压直流低端及其配套的南阳—驻马店特高压交流工程将于2020年接入河南电网。主要分析以上工程投运后河南电网电压稳定特性及其改善措施。计算结果表明,若青海—河南特高压直流工程馈入河南电网功率替代河南电网常规电源,将导致河南电网动态无功支撑能力降低,部分负荷中心近区发生交流故障后郑州东北片区暂态电压无法恢复,需要对河南电网火电机组及调相机开机方式提出要求。针对上述问题提出南阳—驻马店特高压交流工程与青海-河南特高压直流工程同步投运、郑州火电机组留取旋转备用等建议,并验证了建议的有效性。研究结果对电网规划、运行及国内同类直流工程设计都具有参考价值。In order to improve the clean energy absorption capacity of the northwest China power grid and the power supply capacity of the central China power grid,the UHVDC project between Qinghai and Henan and the UHVAC project between Nanyang and Zhumadian will be put into operation in 2020.This paper mainly analyzes the voltage stability characteristics of and improvement measures for the Henan power grid after the above projects are put into operation.The calculation results show that,if the UHVDC project between Qinghai and Henan replaces the conventional power supply,the dynamic reactive power support capacity of the Henan power grid will be reduced,and the transient voltage in the northeast area of Zhengzhou cannot be recovered after AC failure in the near area of part of the load center.It is necessary to put forward requirements for the thermal power units and the synchronous condenser start-up mode in the Henan power grid.In view of the above problems,this paper proposes that the UHVAC project and the UHVDC project should be put into operation synchronously,and thermal power units in the Zhengzhou areas should possess spinning reserve capacity.The effectiveness of the proposal is also verified.This study has reference value for power grid planning and operation and other similar HVDC transmission projects.

关 键 词：特高压直流 河南电网 电压稳定 调相机 旋转备用 多馈入短路比 

分 类 号：TM712[电气工程—电力系统及自动化]