基于主导轨迹断面阻尼比灵敏度的仿真关键参数诊断  

Simulation parameter diagnosis based on the dominant trajectory section damping ratio sensitivity

作　　者：李峰 彭慧敏 李威 袁虎玲 鲍颜红 LI feng;PENG Huimin;LI Wei;YUAN Huling;BAO Yanhong(NARI Group Corporation(State Grid Electric Power Research Institute),Nanjing 211106,China)

机构地区：[1]南瑞集团有限公司(国网电力科学研究院有限公司)

出　　处：《电力工程技术》2019年第3期67-73,共7页Electric Power Engineering Technology

基　　金：国家电网有限公司总部科技项目“大电网仿真收敛性能诊断方法研究”

摘　　要：电力系统机电暂态仿真中,励磁、调速、电力系统稳定器(PSS)等控制系统参数不合理,易引起控制系统稳定性弱化,导致仿真可信度降低。基于轨迹断面阻尼比灵敏度指标,提出一种机电暂态仿真中控制系统关键参数的实用诊断方法。由仿真中各控制系统的输出变量振荡特性确定主导断面时刻、主导发电机及其对应控制系统,针对主导断面时刻和主导发电机进行单机无穷大(OMIB)等值后,经阻尼比灵敏度分析给出参数调整建议,多个算例验证了所提方法的有效性。该法是轨迹特征根思想的一种工程应用,结合数值积分提供的控制系统振荡信息与平衡点特征根技术提供的阻尼比灵敏度解析信息,可快速定位不合理的控制系统参数,适用于复杂多机系统的参数诊断。Unreasonable excitation,speed regulation,PSS and other control system parameters in electromechanical transient simulation of power system will lead to the weakening of control system stability and the reduction of simulation credibility.A practical diagnostic method for this problem is presented based on the dominant trajectory section damping ratio sensitivity.The dominant time section,the dominant generator and its corresponding control system are determined automatically by the output variable oscillation characteristics of each control system in the simulation.After the single-machine infinite(OMIB)equivalent is performed for the dominant time section and the dominant generator,the suggestion of parameter adjustment is given by the sensitivity analysis of damping ratio.The effectiveness of the proposed method is verified by several examples.This method is an engineering application of the idea of trajectory eigenvalue.In combination with the oscillation information of the control system provided by numerical integration and the damping ratio sensitivity analytical information provided by eigenvalue technology,unreasonable control system parameters can be quickly located.It is suitable for parameter diagnosis of complex multi-machine system.

关 键 词：机电暂态仿真 控制系统 参数诊断 轨迹特征根 阻尼比灵敏度 

分 类 号：TM712[电气工程—电力系统及自动化]