含小水电分布式电源的配网线路串联补偿优化

Optimization of Series Compensation for Distribution Network with Small Hydropower Distributed Generation

随着科技的发展,发电技术的经济性、环保清洁性等越受关注。分布式电源可以有效避免传统能源带来的环境污染,缓解传统化石能源的使用危机,是一种前景可观的发电技术,同时还具备消峰填谷的作用,提升电网运行的灵活性及安全性。但其接入电网,也给电网带来了运行稳定性的问题,分布式电源的有功出力输出随机性大,会给配电网的无功优化带来一定的影响。本文以小水电接入电网为例进行分析研究,深入分析小水电给电网带来的不利影响,重点分析对变压器损耗和线路损耗这两方面的影响。最后,举例某地区小水电接入配电网进行分析研究,对丰水期的小水电加入串联补偿装置后线路电压的变化情况展开研究。

With the development of science and technology,more attention has been paid to the economy,environmental protection and cleanliness of power generation technology.Distributed generation can effectively avoid the environmental pollution caused by traditional energy and alleviate the use crisis of traditional fossil energy.It is a promising power generation technology.At the same time,it has the function of peak elimination and valley filling,and improves the flexibility and security of power grid operation.However,its access to the power grid also brings problems of operation stability.The randomness of the active power output of the distributed generation has a certain impact on the reactive power optimization of the distribution network.In this paper,small hydropower connected to the power grid as an example for analysis and research,in-depth analysis of the impact of small hydropower on the grid loss,including the impact on transformer loss and line loss.Finally,taking a small hydropower station in a certain area as an example,the change of line voltage after the series compensation device is added to the small hydropower station in wet season is studied.