摘要
随着直流输电技术的发展,交直流混合系统的相关算法也日益完善。提出了在外网包含直流线路的情况下进行外网等值的方法。将外网中的直流线路用交流线路代替,应用扩展Ward等值法进行外网等值计算。建立交直流混合系统的缓冲网等值模型,用36节点交直流混合系统检验直流输电线用交流输电线代替后外网等值模型的合理性,通过开断实验检验模型的计算误差和精度。实验表明,用交流线路代替直流线路方法可行,所建的外网等值模型能够保证实时网络分析的正确性。
With the developing of DC transmission technology, the algorithm of the AC/DC system is also improved. Based on the study of the external equivalence, the idea of using the AC branch instead of DC branch was presented, then using the extended Ward equivalent to reduce the external system and form an external equivalent model. The external equivalent model of AC/DC system including DC branch in external system was established using 36 nodes system to test the accuracy of the algorithm which firstly uses AC branch instead of DC branch. The result indicates that the equivalent model is reasonable, and the method can ensure the correct analysis of real-time network.
出处
《中国电力》
CSCD
北大核心
2008年第8期12-15,共4页
Electric Power
关键词
直流输电
缓冲网
外网等值
DC transmission
buffer system
external equivalence
