摘要
机电?电磁混合仿真既能够对大规模复杂电网进行机电暂态仿真,也可对局部网络进行电磁暂态仿真,实现仿真规模和仿真精度的协调统一,其仿真结果反映真实情况的程度,决定仿真结果的可信度,通过一种多时间、多位置和多物理量的3级精度评估体系,定量和定性描述机电?电磁混合仿真结果的精度。首先,介绍Prony分析法和特征选择验证这两种典型特征量提取算法的基本原理及相关指标;然后,根据机电?电磁混合仿真各目标观测量的特性,将目标观测量分为3类:电磁系统观测量、接口状态观测量和机电系统观测量,结合两种方法的特点建立分层分级的评估体系;最后,通过评估某系统的两种电流源混合仿真结果和全电磁仿真结果的差异,验证所提评估体系的适用性。
Electromechanical-electromagnetic hybrid simulation can both do electromechanical transient simulation for the large-scale complex power grid and do electromagnetic transient simulation for a local network. It achieves harmonization on simulation scale and simulation accuracy. Whether the simulation results can accurately reflect the real situation will determine the reliability of the simulation results. This paper proposes a multiple time quantum,multiple locations and multiple variables three-level accuracy evaluation system,which can give quantitative value and qualitative interpretation for electromechanical-electromagnetic hybrid simulation. First of all,this paper introduces the basic principles and the relevant indicators of two typical feature extraction algorithms of power system simulation,which are prony method and feature selective validation. Then taking into account the properties of each object observations in electromechanical-electromagnetic hybrid simulation,the object observation is divided into three categories： electromagnetic system observables,the interface state observables and electromechanical system observables. By combining the two methods,a hierarchical accuracy evaluation system is set up. Finally,through evaluating the differences between the results of the two current sources hybrid simulation and full electromagnetic simulation,the applicability of the proposed accuracy evaluation system is verified.
出处
《智能电网》
2016年第1期13-19,共7页
Smart Grid
基金
中央高校基金项目(2015XS22)~~
关键词
机电-电磁混合仿真
精度评估
Prony分析法
特征选择验证法
electromechanical-electromagnetic hybrid simulation
accuracy evaluation
Prony method
feature selective validation
