摘要
介绍了自备电厂的基本结构,建立了同步电机发电模型,分析了电机无功特性受电压暂降幅值与励磁磁链的影响,结合电网潮流分析理论研究了同步发电机发电功率变化对母线电压运行水平的影响。根据暂降发生后某建有自备电厂企业的实测数据,验证了暂降后同步电机运行功率变化对不同电压等级母线电压运行水平起到的支撑作用,母线电压平均被提升33.87%,依据同步电机功率特性和潮流分析理论计算母线残余电压误差小于5%,为企业自备电厂的规范化发展管理、电网的安全稳定运行提供了新的思路。
In this paper,the basic structure of self-owned power plants is introduced,the power generation model of the synchronous motor is established,and the effects of temporary voltage sag value and excitation flux linkage on the reactive power characteristics of the motor are analyzed.Then based on the power flow analysis theory,the influence of power variation of synchronous generator on busbar voltage operating level is studied.Finally,according to the measured data of self-owned power plant enterprise after a sag,it is verified that the change of the operating power of the synchronous motor after the temporary sag plays a supporting role in the busbar voltage operating level of different voltage levels.In the case,the busbar voltage is increased by 33.87 on average,and the residual voltage error of the busbar is calculated to be less than 5 according to the power characteristics of synchronous motors and the power flow analysis theory,which provides a new idea for the standardized development and management of enterprise with self-owned power plants and the safe and stable operation of power grids.
作者
赵忠斌
朱明星
ZHAO Zhongbin;ZHU Mingxing(State Power Investment Corporation Shanxi Aluminum Co.,Ltd.,Yuanping,Shanxi 034100,China;School of Electrical Engineering and Automation,Anhui University,Hefei,Anhui 230601,China)
出处
《山西电力》
2023年第6期36-40,共5页
Shanxi Electric Power
关键词
自备电厂
电压暂降
传变特性
母线电压
潮流分布
self-owned power plants
voltage sag
transmission characteristics
busbar voltage
power-flow distribution
