摘要
针对目前高压直流输电(HVDC)系统的比例-积分(PI)控制器参数优化方法中仅基于单一数学模型的局限性,提出了一种PI控制器参数的整定方法。通过建立高压直流输电逆变侧系统的传递函数模型,求出控制器参数的稳定边界,基于该稳定范围求取符合系统稳定裕度的区域;接着,建立了高压直流输电逆变侧系统的小干扰动态模型,验证了小干扰动态模型的正确性,求解得到符合系统渐进稳定的区域,并将2个区域进行叠加,得到既能满足系统稳定裕度要求,又能满足系统渐进稳定要求的PI控制器参数范围。在PSCAD/EMTDC仿真平台上搭建电磁暂态模型进行仿真验证,结果表明该整定方法能兼顾系统的稳定裕度和渐进稳定性。
Aiming at the current limitation which is only a single model is used in the optimization of PI controller parameters in HVDC systems,a method to tune the parameters is given.According to the transfer function model built firstly,the stability boundary locus is plotted.Then the small-signal model of system is established.After verifying the correctness of the model,the region which accords with the asymptotic stability of the system is found.Finally superpose the set satisfying the stability margin,and then the PI parameter set address both of the performance requirements is found out.The electromagnetic transient model is built and simulated in PSCAD/EMTDC.The results show that the stability margin and asymptotic stability of the system can be taken into account by this tuning method.
作者
黄星海
陈威
傅闯
汪娟娟
李欢
魏伟
HUANG Xinghai;CHEN Wei;FU Chuang;WANG Juanjuan;LI Huan;WEI Wei(School of Electric Power,South China University of Technology,Guangzhou 510641,China;State Key Laboratory of HVDC(Electric Power Research Institute,China Southern Power Grid Co.,Ltd.),Guangzhou 510663,China)
出处
《电力工程技术》
2019年第6期37-46,共10页
Electric Power Engineering Technology
基金
国家自然科学基金资助项目(51777079)
中国南方电网有限责任公司科技项目(ZBKJXM20180104)
