摘要
针对实际无功规划和运行电压调控中关于高、低抗补偿效果的一些模糊经验认识,基于无功补偿调压估算模型,提出了高、低抗补偿调压的机理比较分析公式。在超高压系统中,主变高、低压侧并联高、低压电抗器对其主变高压母线电压的调节大小可分别通过无功补偿调压的一般估算模型及其拓展估算模型进行估算。分别位于华中电网送电电源中心和受端负荷中心的2个典型500kV变电站高、低抗补偿调压的实例仿真比较分析验证了高、低抗补偿调压估算公式的正确性和精确性。仿真结果表明:高、低抗补偿调压的大小主要由补偿点的短路阻抗参数决定;一般在低抗补偿调压不灵敏的地点高抗补偿调压也同样不灵敏,且在同一变电站相同容量高、低抗对主变高压母线电压的调节量之比基本保持稳定,并可通过提出的公式近似估算。
operating and low clarify some intangible experiential ideas in reactive power compensation planning voltage control,the comparative analysis voltage shunt reactors are proposed formulations of voltage regulation mechanism by and high based on the estimation model of reactive power compensation and voltage regulation. In EHV transmission system,the voltage range regulated by high or low voltage reactor connected respectively to the high and low voltage sides of main transformer can be estimated respectively by the general estimation model and expanded estimation model. With two real typical 500 kV substations located respectively in generation and load centers of Central China Power Grid as examples,the simulative results show the correctness and accuracy of the estimation models,as well as the following conclusions：the voltage range regulated by high or low yoltage reactor is mainly determined by the short circuit impedance of compensation location;generally,the compensation location with low regulation sensitivity for low voltage reactor has also low regulation sensitivity for high voltage reactor,the ratio of voltage regulated by high and low voltage reactors with same capacity at same substation is basically stable and can be estimated by the proposed formulations.
出处
《电力自动化设备》
EI
CSCD
北大核心
2010年第2期63-66,共4页
Electric Power Automation Equipment
基金
国家自然科学基金项目(60574071)~~
关键词
超高压输电系统
无功补偿:电压调节
并联电抗器
拓展估算模型
EHV transmission system
reactive power compensation
voltage regulation
shunt reactor
expanded estimation model
