摘要
为了研究定子绕组暂态对同步调相机动态无功特性及特高压直流近区系统电压的调节作用,对比分析了定子绕组暂态对同步调相机实用模型的影响。首先建立了同步调相机的时步有限元模型,并通过模型机的动态实验对计算结果进行了验证,从而获得了同步调相机的标准响应曲线;然后推导了计及定子绕组暂态与不及定子绕组暂态时同步调相机的饱和实用模型,计算了系统电压突变后不恢复、突变持续0.2 s恢复和突变持续1 s恢复时同步调相机的动态无功特性及机端电压的变化规律,最后对比分析了系统电压突升及突降时定子绕组暂态对同步调相机发出无功能力和吸收无功能力的影响。研究结果可为同步调相机的无功动态特性提供技术支撑,进一步保障电网电压稳定运行。
In order to study the influence of stator winding transient on the dynamic reactive power characteristics of synchronous condensers and the voltage regulation of ultra high voltage direct current(UHVDC)near-zone system,the influence of stator winding transient on the practical model of synchronous condensers was compared and analyzed.Firstly,the time-step finite element model of the synchronous condenser was established,and the calculation results were verified by the experiments of the model machine,thus the standard response curve of the synchronous condenser was obtained.Then the saturated practical model of the synchronous condenser with and without the stator winding transient was deduced,and the variation law of the dynamic reactive power characteristic and terminal voltage were calculated under different disturbance of the system voltage.At last,influence of the stator winding transient on the ability of the absorbing and delivering reactive power was studied under the rise and drop of the system voltage.The change rule of the contrast analysis of the system voltage rose and fell sharply when the stator winding transient synchronous condenser is on the influence of the reactive power ability and has the ability to absorb reactive power.The research results provide technical support for the reactive dynamic characteristics of synchronous condensers and further guarantee the stable operation of the power grid voltage.
作者
杨鹏程
徐东海
李志强
许国瑞
YANG Peng-cheng;XU Dong-hai;LI Zhi-qiang;XU Guo-rui(State Grid Corporation of China,Beijing 100031,China;NARI Technology Co.,LTD.,Nanjing 211106,China;Power System Department,China Electric Power Research Institute,Beijing 100192,China;School of Electric and Electronic Engineering,North China Electric Power University,Beijing 102206,China)
出处
《电机与控制学报》
EI
CSCD
北大核心
2020年第11期148-155,共8页
Electric Machines and Control
基金
国家自然科学基金(51977077)。
关键词
同步调相机
定子绕组暂态
电压调节
无功特性
时步有限元
实用模型
synchronous condenser
stator winding transient
voltage regulation
reactive power characteristic
time-stepping finite element
practical model
作者简介
杨鹏程(1985—),男,博士,高级工程师,研究方向为特高压直流输电技术、直流工程建设管理工作;徐东海(1984—),男,硕士,工程师,研究方向为国产大型抽水蓄能励磁系统的现场调试及试验;李志强(1978—),男,博士,教授级高工,研究方向为电力系统实测建模、参数辨识及电磁场数值计算;通信作者:许国瑞(1986—),男,博士,副教授,研究方向为大型发电机模型、参数及机网协调运行与控制。
