摘要
在大量分布式电源接入配电网的新形势下,对基于分布式电源孤岛运行的配电网供电恢复及孤岛黑启动策略进行了研究。首先提出根据配电网场景优选孤岛划分模式的新思路,并以4种配电网场景为例,针对具体场景选择不同孤岛划分模式。然后分析每个孤岛内的有功平衡,在DG出力无法满足全部负荷的情况下,搭建0-1整数背包模型,并采用动态规划算法,对孤岛内负荷进行了优化选择。孤岛黑启动操作时,为了实时保障黑启动过程中的孤岛稳定性,提出孤岛稳定裕度指标,评估孤岛稳定状态,随后根据稳定裕度指标制定了孤岛内电源和负荷的启动顺序。最后对10 k V典型配电系统进行了仿真分析,论证了停电区域因地制宜确定孤岛划分模式思路的可行性,同时验证了负荷选择策略和孤岛黑启动操作策略的正确性及有效性。
With the maturity of distributed generation （DG） technology, more and more distributed generators are connected to the distribution network. Distribution system power supply restoration based on DG island operation and its black start are studied in this paper. Firstly, according to the distribution network scene, different island division modes are selected. Then four typical power distribution network scenarios are given as examples. The active power balance is analyzed for each island. If the DG output cannot meet the full load, the dynamic programming algorithm is used to choose loads based on 0-1 integer knapsack model. For island black start operation, in order to ensure real time stability in the black start process, islanding stability margin index is proposed to evaluate the islanding stability state. Afterwards, the startup sequence of DGs and loads are determined. Finally, the simulation based on a typical 10 kV distribution system is implemented. The simulation results verify the feasibility of the island dividing mode based on local conditions, and the correctness and validity of the load selection and the black start operation strategy are validated.
出处
《电工技术学报》
EI
CSCD
北大核心
2015年第21期67-75,共9页
Transactions of China Electrotechnical Society
基金
国家自然科学基金(51407113)
上海绿色能源并网工程技术研究中心(13DZ2251900)资助项目
关键词
配电网
分布式电源
供电恢复
孤岛划分模式
黑启动
孤岛稳定裕度
Distribution network, distributed generator, restoration, island partitioning, black start,stability margin of island
