电力电子接口电源的准功率特性降阶建模体系  

A Generic Reduced-order Modeling Hierarchy for Power-electronic Interfaced Generators With the Quasi-constant-power Feature

作　　者：叶一达[1] 魏林君[2] 阮佳阳 李琰[2] 鲁宗相[1] 乔颖[1] 

机构地区：[1]电力系统及发电设备控制和仿真国家重点实验室(清华大学电机系),北京市海淀区100084 [2]中国电力科学研究院,北京市海淀区100192 [3]ABB(中国)有限公司,北京市朝阳区100015

出　　处：《中国电机工程学报》2017年第14期3993-4001,共9页Proceedings of the CSEE

基　　金：国家电网公司科技项目(XTB17201500037)~~

摘　　要：系统级仿真中如何对电力电子接口电源降阶建模并分析其暂态稳定性成为新能源并网研究中亟待解决的难题。该文以蓄电池储能系统BESS为研究对象,根据电力电子接口特有的机电解耦原理解释这一类电源的准功率特性,并基于奇异摄动理论分析电源内部的精细时间尺度结构。据此,该文建立适应不同复杂度、精度要求的微分代数方程DAE降阶模型体系。在不同网侧外部扰动及电源内部参数配置的条件下验证降阶模型体系的有效性。模型可揭示具有准功率特性电源的暂态失稳模式,并保持电源外特性的模拟精度,计算出的暂态失稳临界指标满足实际需求。Reduced-order modeling and transient stability simulation are crucial for studying renewable energy generations＇ integration into power systems through power-electronic interfaces. The battery energy storage system （BESS） was selected to model power-electronic interfaced generators with quasi-constant-power feature caused by its electromechanical decoupling essence. Thus, a generic differential algebraic equation （DAE） modeling hierarchy was proposed, which is adaptive to different accuracy and complexity requirements, based on multiple-time-scale analysis and singular-perturbation equivalence theory. Performances of the proposed models were validated in simulation with various external disturbances and internal configurations of BESS. The models are able to reveal and quantify transient stability essence caused by power-electronic interface＇s quasiconstantpower feature.

关 键 词：电力电子接口电源 准功率特性 降阶模型体系 暂态稳定 

分 类 号：TM85[电气工程—高电压与绝缘技术]