基于PSCAD/EMTDC双馈风电场汇集站实验仿真平台(Ⅰ):暂态特性分析

An Experimental Simulation Platform for Doubly-fed Wind Farm Collecting Station Based on PSCAD/EMTDC (Ⅰ): Transient Characteristic Analysis

针对我国风力发电的发展和风力发电技术专业的实验教学情况,紧跟风电场并网实际场景,在PSCAD/EMTDC搭建双馈风电场汇集站实验仿真平台。考虑风电机组输入风速变化,分析短路时双馈变速风电机组故障特性以及其对汇集站三绕组变压器动态特性的影响;分析三绕组变压器传统保护的适应性。该平台可将理论教学与实验教学有机结合,让学生深入学习双馈变速风电机组故障特性与机组输入风速的关系,对三绕组变压器的影响以及对变压器传统继电保护适应性的影响,锻炼学生分析问题和解决问题的能力。

Aiming at the development of wind power generation in China and the experimental teaching situation of wind power technology major,following the actual scene of wind farm grid-connection,an experimental simulation platform of doubly-fed wind farm collection station is built in PSCAD/EMTDC.Firstly,considering the variation of input wind speed of wind turbine,the fault characteristics of doubly fed variable speed wind turbine under short circuit and its influence on the dynamic characteristics of three-winding transformer of gathering station are analyzed.Then,the adaptability of traditional protection of three-winding transformer is analyzed.The platform can organically combine theoretical teaching with experimental teaching,so that students can further learn the relationship between the fault characteristics of doubly fed variable speed wind turbine and the input wind speed of the unit,as well as its influence on the three-winding transformer and the adaptability to the traditional relay protection of the transformer,and exercise students’ability to analyze and solve problems.