CAJ | 학술논문

负荷是电力系统的重要组成部分，建立合理的负荷模型对电力系统安全稳定分析和实时监控具有重要意义。目前综合负荷模型被广泛采用，但完整描述其动态特性需要十余个参数，在线辨识全部参数几乎不可能。文中从综合负荷模型状态方程入手，在保证暂态响应近似相等的准则下提出一种综合负荷模型简化方法，并在此基础上分析不同的参数对负荷动态特性的影响以及参数之间的相关关系，最终选取了感应电动机比例、电动机暂态电抗、电动机稳态滑差以及电动机转子时间常数组成辨识参数集，并通过仿真验证了相关结论。
부하시전력계통적중요조성부분，건립합리적부하모형대전력계통안전은정분석화실시감공구유중요의의。목전종합부하모형피엄범채용，단완정묘술기동태특성수요십여개삼수，재선변식전부삼수궤호불가능。문중종종합부하모형상태방정입수，재보증잠태향응근사상등적준칙하제출일충종합부하모형간화방법，병재차기출상분석불동적삼수대부하동태특성적영향이급삼수지간적상관관계，최종선취료감응전동궤비례、전동궤잠태전항、전동궤은태활차이급전동궤전자시간상수조성변식삼수집，병통과방진험증료상관결론。
Load is an important part of the power system,a rational model of load is of significance to security and stability analysis of power systems.Currently,the most widely used is the model for composite load.However,more than 10 dynamic parameters of a composite load model are needed for its complete description,which makes it difficult to identify all of them for online analysis and use.By proceeding from the state equation of the composite load model while ensuring the criterion for transient responses to be approximately equal,a method for composite load model simplification is proposed.On this basis,an analysis is made on the influences of different parameters on the load dynamic characteristics as well as the correlation between parameters.Finally selecting the percentage of motor load,the transient reactance of motor,the initial slip of motor and the rotor inertia constant of motor as the parameter set to be identified with the conclusions proved by simulation results.