微电网系统准同期并网改进控制策略

发布时间：2018-06-10 02:52

本文选题：微电网 + 准同期　；参考：《电网技术》2014年11期

【摘要】：微电网中越来越多以电力电子装置为接口的分布式电源采用模拟同步发电机的下垂控制策略来实现并网和孤岛工况的运行及相互之间的切换。基于分布式电源下垂控制策略和传统电网自动准同期并列装置工作原理,分析了微电网系统准同期并网原理,将频率调节和相角调节进行了统一,提出了一种微电网系统准同期并网的改进简化方法。针对电网末端三相电压不平衡等实际工况,采用正负序角度之和实现通信的传输,降低了对通信实时性的要求,增加负序分量的同步环节,提出了一种弱电网工况微电网系统准同期并网
[Abstract]:In microgrid, more and more distributed power generation with power electronic device interface adopts droop control strategy of analog synchronous generator to realize the operation of grid-connected and islanding operation and the switching between each other. Based on the droop control strategy of distributed power generation and the working principle of traditional automatic quasi-synchronous parallel device, the principle of quasi-synchronous grid-connected microgrid system is analyzed, and the frequency regulation and phase angle regulation are unified. An improved and simplified method for quasi-synchronous grid-connected microgrid system is presented. Aiming at the unbalance of three-phase voltage at the end of power network, the sum of positive and negative sequence angle is used to realize the transmission of communication, which reduces the requirement of real-time communication and increases the synchronous link of negative sequence component. In this paper, a kind of quasi-synchronous grid-connected microgrid system under weak grid condition is proposed.
【作者单位】：国家能源主动配电网技术研发中心(北京交通大学);
【基金】：国家863高技术基金项目(2011AA05A306)~~
【分类号】：TM73

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