Abstract

As for renewable energy, the distributed generation (DG) technology has a promising outlook and is getting more concern in worldwide. In order to ensure the distribution network operate on the best performance when accessed by DG, DG must have a good reactive support for the distribution network. In this paper, the models of different DGs reactive power external characteristics are given. And in the modified case of IEEE37, the SVSA program which is developed by Tianjin University are used to analyze the reactive support of different DG. The case study shows that under some certain control strategies and operation conditions, when properly making use of the reactive support, the distribution network has a better performance in power loss and also has a positive impact on the stability and economical operation. Compare with traditional reactive power compensation device, the DG performs better in overall network voltage and economical operation of network.

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