1.清华大学电机工程与应用电子技术系,北京市100084;2.电力系统及发电设备控制和仿真国家重点实验室,清华大学,北京市100084
特高压接入给其近区电网的无功电压运行和控制带来挑战。结合工程实践,文中研究了面向特高压近区电网的自动电压控制方法。分析了特高压近区电网的无功电压运行控制特点,针对特高压有功潮流变化对近区电网母线电压影响大,电网电压波动大,多电厂、多变电站紧密耦合等运行特性,提出并实现了考虑特高压线路运行方式变化的敏捷电压优化控制技术,同时兼顾特高压近区电网内紧密耦合的多电厂之间、多变电站之间、电厂与变电站之间的协同,在保证电压安全的基础上,减少不合理的无功功率流动,避免不必要的电容电抗器等离散设备投切。所提出的方法已经在实际现场投入闭环运行,运行效果证明了其有效性和可行性。
1.Department of Electrical Engineering,Tsinghua University,Beijing100084,China;2.State Key Laboratory of Control and Simulation of Power Systems and Generation Equipments,Tsinghua University,Beijing100084,China
The connection of ultra-high voltage(UHV)transmission line has brought a challenge to the voltage operation and control of its neighboring power system.Facing engineering practice,this paper proposes an automatic voltage control(AVC)method for the UHV neighboring grids.The reactive voltage operation and control characteristics of UHV neighboring grids are analyzed,including the tremendous impact of UHV active power flow change on the bus voltage in UHV neighboring grids,the large voltage fluctuation,and the tight coupling among power plants and substations,etc.The smart voltage optimal control technology is proposed and implemented by taking into consideration these characteristics and the coordinated control among tightly coupled power plants and substations in the UHV neighboring grids.This method can reduce the irrational reactive power flow and bypass the unnecessary discrete device action,while ensuring voltage security.The proposed method is put into closed-loop field operation in China for its validated efficiency and practicability.
[1] | 王彬,郭庆来,孙宏斌,等.交流特高压近区电网自动电压控制研究与实践[J].电力系统自动化,2013,37(21):99-105. DOI:10.7500/AEPS20130826008. WANG Bin, GUO Qinglai, SUN Hongbin, et al. Automatic Voltage Control for Ultra-high Voltage AC Neighboring Grids[J]. Automation of Electric Power Systems, 2013, 37(21):99-105. DOI:10.7500/AEPS20130826008. |