摘要
机电暂态仿真已不能满足新型电力系统的仿真需求,但是若对包含大量同步发电机等传统机电元件的大电网进行电磁暂态仿真,将会面临“维数灾”。因此,对同步发电机进行简化是十分必要的。首先,提出了一套含两种等效电路的发电机组自定义建模方案,可根据实际仿真需求选择不同阶数的同步发电机模型,以达到简化仿真模型的目的。其次,针对发电机组需要超长启动时间,不适合电磁暂态仿真的问题,提出了一套适用于自定义发电机组的初始化方法,使得系统在仿真之初就能到达稳态。最后,基于PSCAD仿真软件分别搭建单机模型、美国西部电网3机9节点系统模型,验证了所提同步电机自定义建模方法及其等效电路的准确性,以及初始化方法的可行性。
Nowadays electromechanical transient simulations can no longer meet the simulation requirements of new power systems.However,electromagnetic transient simulations of large grids with numerous traditional electromechanical components,such as synchronous generators,would encounter a dimensional disaster.The simplification of synchronous generators is thus imperative.Firstly,a set of custom modeling scheme containing two equivalent circuits is proposed for the generator unit.According to the actual simulation requirements,synchronous generator models with different orders can be selected to simplify the simulation model.Secondly,in view of the fact that the generator set requires a lengthy starting time,rendering it unsuitable for electromagnetic transient simulation,a set of initialization methods suitable for custom modeling generator sets is proposed to ensure that the system can reach steady state at the beginning of simulation.Finally,the accuracy of the proposed custom modeling method for synchronous generators and its equivalent circuit,as well as the feasibility of the initialization method,are verified by building a single generator model and a WSCC three-generator nine-bus system model using PSCAD,respectively.
作者
王俊磊
王顺亮
马俊鹏
王鹏
何海林
刘天琪
WANG Junlei;WANG Shunliang;MA Junpeng;WANG Peng;HE Hailin;LIU Tianqi(College of Electrical Engineering,Sichuan University,Chengdu 610065,Sichuan Province,China)
出处
《现代电力》
北大核心
2025年第4期695-703,I0005-I0007,共12页
Modern Electric Power
基金
国家自然科学基金资助项目(51977135)。
关键词
同步发电机
PSCAD
电磁暂态仿真
自定义建模
初始化
synchronous generator
PSCAD
electromagnetic transient simulation
custom modeling
initialization
