交直流混合系统负荷功率裕度分析  

Research on load margin of AC/DC hybrid power grid

作　　者：张尧[1] 张建设[1] 武志刚[1] 张志朝[1] 

机构地区：[1]华南理工大学电力学院,广东广州510640

出　　处：《电力自动化设备》2005年第9期1-4,共4页Electric Power Automation Equipment

基　　金：国家自然科学基金重点资助项目(50337010);高等学校博士学科点专项科研基金资助项目(20020561004)~~

摘　　要：定义了区域有功负荷裕度指标,运用该指标研究了给定负荷增长方式下2005年广东实际交直流电网的静态电压稳定状况,结果表明,珠江三角洲重负荷区域、粤东地区负荷裕度小,是静态电压稳定薄弱区域。针对给定负荷增长方式确定系统负荷功率极限结果偏乐观的缺陷,提出了交直流混合系统最临近负荷功率极限算法,采用交直流潮流交替迭代方法,同时可计及稳态时直流不同控制方式和换流站无功补偿对功率裕度的影响。算例分析表明,该算法能方便地计算交直流混合系统在最恶化负荷增长方向下的负荷功率裕度。The regional load margin index（IRLM） is defined,with which the static voltage stability of Guangdong AC/DC hybrid power grid in 2005 is studied. The research results show that the heavy load regions of the Pearl River Delta and the eastern regions of Guangdong power grid have small load margin,which are the weak regions of static voltage stability. Because the load margin calculated by the given load increase is overestimated,CCLP（the-Closest-Critical-Load-Point） algorithm is proposed. Alternate iteration of AC/DC power flow calculations is applied and the influence of different HVDC stable control modes and reactive power compensation in the converts on load margin are considered at the same time. The test results show that the closest critical load margin can be easily calculated using CCLP algorithm. This project is supported by National Natural Science Foundation of China（50337010） and Special Scientific and Research Funds for Doctoral Speciality of Higher Education（20020561004）.

关 键 词：交直流混合系统 静态电压稳定 区域负荷裕度 弱区域 最临近负荷功率极限点 

分 类 号：TM712[电气工程—电力系统及自动化]