同伦摄动模态子区间算法在微电网孤岛潮流计算中的应用

Application of Homopoty Perturbation Modal Subinterval Algorithm in Power Flow Computation of Islanded Micro-Grid

与传统输电网和配电网络不同,微电网中的分布式发电装置通过电力变换装置给负荷供电,所以考虑并网整流/逆变装置的影响,同时建立包含微电源、柔性交流输电系统、线路以及不同负荷类型的微电网精确数学模型。此外,计及负荷及微电源出力的时间波动性,引入同伦摄动子区间理论构造求解孤岛微电网区间潮流方程,并通过模态分析法提高区间运算精度。算例结果验证了所建模型及求解方法的有效性。

Different from the traditional transmission network and distribution network,the distributed generation devices in micro-grid supply power energy for the loads through the power electronic device.This paper describes the accurate mathematics models including micro-sources,flexible AC transmission system（FACTS）,feeders and different types of loads considering the influence of the rectifier/inverter device.In addition,taking variation of loads and DG output power into consideration,the homopoty perturbation subinterval theory is introduced in the analysis and solution of interval power flow in the islanded micro-grid as well as the modal interval to improve the accuracy.Results validate the correctness of models and algorithms.