基于扰动后暂态量的戴维南等值参数辨识方法  

Identification Method for Thevenin Equivalent Parameters under Transient Disturbance Data

作　　者：肖俊 司徒友 袁炜灯 杨阳 XIAO Jun;SITU You;YUAN Wei-deng;YANG Yang(Dongguan Power Supply Bureau of Guangdong Power Grid Co., Ltd., Dongguan Guangdong 523008, China)

机构地区：[1]广东电网有限责任公司东莞供电局,广东东莞523008

出　　处：《西南师范大学学报（自然科学版）》2020年第6期113-119,共7页Journal of Southwest China Normal University(Natural Science Edition)

基　　金：广东电网有限责任公司科技项目GDKJXM20162533(031900KK52160081)。

摘　　要：针对现有戴维南等值参数辨识算法对等值系统发生扰动时适应能力不强的情况,提出了基于系统扰动后暂态量的戴维南等值参数辨识方法.首先对等值系统扰动下传统等值方法无法辨识戴维南等值参数进行了分析,然后阐明了基于扰动后暂态电压电流信号辨识等值参数的实现原理,利用最小二乘法求出端口电流电压约束关系下微分方程的系数,对比等值网络稳态时的等值参数,从而获得该等值网络暂态状态的戴维南等值参数.通过对简单电路网络和IEEE9节点系统进行仿真分析,结果验证了此方法在等值系统扰动后对戴维南等值参数进行跟踪辨识的可行性和有效性.Aiming at the fact that the existing Thevenin equivalent parameter identification algorithm can not adapt to the disturbance of the equivalent system,a Thevenin equivalent parameter identification method based on transient components after disturbance has been proposed.Firstly,the reason has been analyzed that the traditional equivalent method cannot be used to identify the Thevenin equivalent parameter under the equivalent system disturbance.Then the realization principle of the equivalent parameter identification with the transient voltage and current signals has been clarified.The coefficients of the differential equation under the constraint of the port current and voltage have been obtained by the least squares method,and then been correlated with the equivalent parameters of the equivalent network under steady state to obtain the equivalent parameters.The simulation analysis of the simple circuit network and the IEEE 9 bus system demonstrated the feasibility and effectiveness of the method for tracking and identifying the Thevenin equivalent parameters under the disturbance of the equivalent system.

关 键 词：戴维南等值 参数辨识 扰动 暂态分量 

分 类 号：TM74[电气工程—电力系统及自动化]