负载率对孤立海岛微电网暂态稳定性的影响

张贻娜; 高超峰; 王文明; 朱文江; 胡明

doi:10.16513/j.cnki.10-1427/tk.2018.04.005

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分布式能源 ›› 2018, Vol. 3 ›› Issue (4) : 32-40. DOI: 10.16513/j.cnki.10-1427/tk.2018.04.005

负载率对孤立海岛微电网暂态稳定性的影响

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Influence of Load Rate on Transient Stability of Isolated Island Microgrid

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摘要

孤立海岛微电网用户多为旅游业和工业等，这些负载的季节性、时节性较强，容易出现不同等级负载情况，这对系统的暂态稳定性有直接作用，为此研究了负载率对孤立海岛微电网暂态稳定性的影响。通过改变某孤立海岛微电网负载率，形成重度轻载、轻度轻载、水平适中、轻度重载、重度重载这5个负载水平，并对5种负载率下的海岛微电网进行一系列暂态稳定性仿真分析，包括切机、大负荷突增、大负荷突减，以探究负载率对孤立海岛微电网暂态稳定性的影响作用。结果表明：剩余容量足够的前提下，单台机切机时，负载率越大暂态稳定性越好；负荷阶跃百分比相同时，负载率越大暂态稳定性越差；负荷阶跃百分比不同时，暂态稳定性由负荷率及负荷阶跃百分比共同决定。

Abstract

The users of isolated island microgrid are mostly tourism and industry, etc, these loads are very seasonal and time-sensitive so that it is easy to have different levels of loads, which has a direct effect on the transient stability of system, the influence of load rate on the transient stability of isolated island microgrid is studied for this. By changing the load rate of an isolated island microgrid, we form five load levels which are heavy light load, mild light load, moderate load, mild heavy load, heavy heavy load, and analyze a series of transient stability simulation for these five scenes in order to study how load rate influences the transient stability, including generator tripping, sudden increase of load, and sudden decrease of load. The results show that the higher the load rate, the better the transient stability when a single generator is cut and the excess capacity is enough; when the load step percentage is the same, the higher the load rate, the worse the transient stability; when the load step percentage is different, the transient stability is determined by the combination of load rate and load step percentage.

导出引用

张贻娜, 高超峰, 王文明, 等. 负载率对孤立海岛微电网暂态稳定性的影响[J]. 分布式能源. 2018, 3(4): 32-40 https://doi.org/10.16513/j.cnki.10-1427/tk.2018.04.005

Yina ZHANG, Chaofeng GAO, Wenming WANG, et al. Influence of Load Rate on Transient Stability of Isolated Island Microgrid[J]. Distributed Energy Resources. 2018, 3(4): 32-40 https://doi.org/10.16513/j.cnki.10-1427/tk.2018.04.005

中图分类号： TM 732

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