混合式配电变压器数字控制系统离散域建模与稳定性分析  

Discrete domain modeling and stability analysis on digital control system of hybrid distribution transformer

作　　者：高亚晨 梁得亮[1,2] 柳轶彬 张立石 李大伟 吴子豪[3] GAO Yachen;LIANG Deliang;LIU Yibin;ZHANG Lishi;LI Dawei;WU Zihao(State Key Laboratory of Electrical Insulation and Power Equipmemt,Xi’an Jiaotong University,Xi’an 710049,China;Smart Grid Key Laboratory of Shaanxi Province,Xi’an Jiaotong University,Xi’an 710049,China;State Grid Shaanxi Province Electric Power Research Institute,Xi’an 710100,China)

机构地区：[1]西安交通大学电力设备与电气绝缘国家重点实验室,陕西西安710049 [2]西安交通大学陕西省智能电网重点实验室,陕西西安710049 [3]国网陕西省电力公司电力科学研究院,陕西西安710100

出　　处：《电力自动化设备》2022年第6期212-217,共6页Electric Power Automation Equipment

基　　金：国家电网公司科技项目(SGSNKY00KJJS1900039)。

摘　　要：为准确分析混合式配电变压器(HDT)数字控制系统的特性,构建了HDT连续-离散混合控制模型,并分析了HDT数字控制系统的稳定性。针对所建立的HDT数字控制系统离散域模型,考虑采样和零阶保持器引入的延时环节的作用,结合双线性变换并利用朱利判据推导了离散域下HDT控制系统比例积分参数的约束条件,进而分析并揭示了采样周期对于HDT数字控制系统稳定性的影响规律,并确定合理的数字控制参数。最后通过仿真以及实验验证了理论分析的正确性。For precisely analyzing the characteristics of HDT(Hybrid Distribution Transformer)digital control system,a continuous-discrete hybrid control model of HDT is built,then the stability of HDT digital control system is analyzed.Aiming at the established discrete domain model of HDT digital control system,considering the function of time delay introduced by sampling and zero-holder,and combined with Tusin transform and Jury stability criterion,the restrictions of PI parameters of HDT control system in discrete domain are deduced.Based on this,the influence law of sampling cycles on the stability of HDT digital control system is analyzed and revealed,and then reasonable digital control parameters are confirmed.Finally the correctness of theoretical analysis is verified by both simulation model and experiment.

关 键 词：混合式配电变压器 数字控制 采样延时 稳定性分析 

分 类 号：TM421[电气工程—电器]