2013电力系统自动化专委会学术交流研讨会论文集
基于动态相量法的逆变型分布式电源微电网建模与仿真
胡 伟，查晓明，高明海，刘 飞
（武汉大学电气工程学院，湖北省武汉市 430072）
摘要：微电网中变流器的电磁暂态过程加剧了微电网的动态特性分析难度，为了快速准确的分析微电网的动态特性，本文采用动态相量法建立逆变型分布式电源微电网的动态相量模型。在MATLAB/Simulink中分别建立含2台并网逆变器的微电网的动态相量模型和电磁暂态模型，比较结果表明动态相量模型在较高精度范围内近似电磁暂态模型，验证了模型的正确性和有效性。同时，本文提出的微电网动态相量模型在保证较高精度时，提高了仿真速度，节省了仿真时间，为复杂微电网的建模提供了一种新方法。
关键词：微电网；逆变器；动态相量模型；电磁暂态模型
Modeling and Simulation of Micro-grid including
Inverter-interfaced Distributed Resources Based on
Dynamic Phasors
HU Wei, SUN Jianjun, GAO Minghai, LIU Fei, ZHA Xiaoming
(School of Electrical Engineer, Wuhan University, Wuhan 430077, China)
Abstract: The difficulty of the micro-grid dynamic characteristics analysis is exacerbated by the electromagnetic transient process of the converter. In order to analyze the dynamic characteristics of the micro-grid quickly and accurately, a dynamic phasor model of the micro-grid including inverter-interfaced distributed resources is presented. The dynamic phasors model and electromagnetic transient (EMT) model for the micro-grid including two inverter-interfaced distributed resources are simulated by the MATLAB/Simulink. Comparing with the electromagnetic transient model, the simulation results show that in the range of high accuracy, the simulation results of two models are approximate. The simulation results further verified the correctness and validity of the model. Meanwhile the proposed model not only obtains higher accuracy, but also reduces the calculation complexity and saves the simulation time. This model provides a new method for modeling complex micro-grid.
Key words: micro-grid; inverter-interfaced; distributed resources; dynamic phasor model; electromagnetic transient model
0 引言
与传统大电网不同，微电网中包含各种形式的微电源，如太阳能、风能、燃料电池等，其中很多能源转换为电能后输出一般为直流或高频交流电，需要利用电力电子装置变换为电网可用的交流电[1-3]。采用变流器为分布式能源接口组成的微电网因其具有灵活的运行模式和良好的可控性，
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