摘要
频率是受发电供给和负荷需求平衡关系变化影响的电气量,是有功功率不平衡的指示器,频率研究是系统稳定分析的一个重要分支。本文采用传统的分析方法,通过对单机带负荷模型系统的研究,在系统受到大的干扰或者过负荷情况下,分析发电机输出功率和负荷电压的变化,确定系统可能出现的最大不平衡功率,研究系统的频率稳定情况。仿真结果表明:系统不平衡功率受到发电机电压、系统阻抗和负荷特性共同作用的影响,进而影响系统频率和电压稳定。该结论对系统频率稳定紧急控制研究具有重要的现实意义。
Frequency is a continuously changing variable that is a function of generation supply and load demand.It is an active power imbalance indicator and an important branch of the system stability researches.In this paper,the traditional analytical method is adopted and the single generator load model power system is researched.Following the system disturbance or overload cases,the generator power output and load voltage are analyzed,and the maximum possible system load power is confirmed.Meanwhile,the frequency stability is discussed.Based on the simulation results,the system imbalance power is commonly influenced by generator voltage,system impedance and load characteristics.This will affect system frequency and voltage stability.This conclusion has important practical significance for the system frequency stability emergency control research.
出处
《石河子大学学报（自然科学版）》
CAS
2012年第6期771-775,共5页
Journal of Shihezi University(Natural Science)
基金
国家自然科学基金项目(50837002)
关键词
单机负荷系统
有功功率平衡
频率稳定
电压稳定
紧急控制
single generator load system
active power imbalance
frequency stability
voltage stability
emergency control
