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微型电网运行及控制设计

, PP. 268-275

Keywords: 分布式发电系统,微型电网,协调保护,控制模式

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Abstract:

在研究了目前国内外微电网发展的基础上,构造了一个由多微电源组成的典型微电网,利用PSCAD软件搭建其动态仿真模型。研究了该微型电网在并网模式、孤网模式以及过渡模式下的动态运行特性,在分析了分布式电源功率、电压以及频率变化规律的基础上,给出了微网系统在3种运行方式下的运行、控制和保护策略。仿真结果证明了控制方式与保护策略的有效性。结果表明基于电力电子接口的分布式发电系统,在合理的控制策略下,微电网可以并网或孤网运行,并可实现运行状态的平滑过渡和转换,减少孤网运行时的暂态影响并保证系统稳定性和电压质量。

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