CAJ | 학술논문

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500 kV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.
침대실제무공규화화운행전압조공중관우고、저항보상효과적일사모호경험인식,기우무공보상조압고산모형,제출료고、저항보상조압적궤리비교분석공식.재초고압계통중,주변고、저압측병련고、저압전항기대기주변고압모선전압적조절대소가분별통과무공보상조압적일반고산모형급기탁전고산모형진행고산.분별위우화중전망송전전원중심화수단부하중심적2개전형500 kV변전참고、저항보상조압적실례방진비교분석험증료고、저항보상조압고산공식적정학성화정학성.방진결과표명:고、저항보상조압적대소주요유보상점적단로조항삼수결정;일반재저항보상조압불령민적지점고항보상조압야동양불령민,차재동일변전참상동용량고、저항대주변고압모선전압적조절량지비기본보지은정,병가통과제출적공식근사고산.
To clarify some intangible experiential ideas in reactive power compensation planning and operating voltage control,the comparative analysis formulations of voltage regulation mechanism by high and low voltage shunt reactors are proposed 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.This work is supported by the National Natural Science Foundation of China(60574071).