微网并网容量分析

将分布式发电以微网形式接入到主电网中并网运行,与主电网互为支撑,是充分发挥分布式发电的最有效方式之一.研究微网并网规模,明确主电网接纳微网的能力,将充分发挥新能源及可再生能源的优势,实现主电网与分布式新能源及可再生能源发电的协调发展,有利于引导与规范微网接入主电网,确保主电网的安全、稳定、经济、高效运行.从微网并网系统的特点出发,分析了微网并网的相关问题,研究了微网并网对主电网的影响,同时对微网并网容量即主电网接纳微网能力进行分析,最后结合算例针对微网并网的稳态分析,通过仿真实现了对微网并网容量的确定.

Acceptable Capacity of Microgrid Connected to the Main Power Grid

One of the most effective ways to fully develop the Distributed Generation （DG） is to connect DG with the main power grid by means of micrngrids, which support reeiprocally with the nlain power grid. Studies on the microgrid size to be connected and the accommodation capacity of the main power grid are beneficial to the best utilization of renewable energy resources, and to achieve the coordinated development between the DG and the main power grid. The studies also help to provide guidance and specifications for the connection of the microgrid with the main power grid and to ensure the safety, stability, and economical efficiency of the main grid. Starting with the charaeteristies of the interconnected system of the microgrid, this paper analyzes the related issues on the microgrid＇s connection with the main grid, and studies its impacts upon the later. Ⅱ also explores the microgrid＇s capacity for connection as well as the accommodation capacity of the main power grid for microgrid connection. Finally, simulations are condueted using MATLAB/SIMULINK based on the steadystate analysis, and the result confirms the acceptable capacity of microgrid connected to the main power grid.