CAJ | 학술논문

大规模风电集中接入电网造成的网架结构密集化和系统潮流复杂多变使得电网自组织临界状态的演化呈现新的特点。提出将网络拓扑熵和潮流熵应用到电网自组织临界状态演化特性研究中，表征风电场规模化集中接入电网环境下的网架结构和潮流分布变化规律。研究表明，大规模风电集中接入后，为外送风电功率建设的输送通道减小了系统的网络拓扑熵；风电接入规模超过当地负荷的吸纳能力时，会增加系统的潮流熵，同时，风电出力的波动也可能急剧增加系统的潮流熵。电网运行状态朝着自组织临界点演化。最后，以甘肃省河西地区酒泉风电基地为例验证了电网自组织临界性状态演化规律的正确性。
대규모풍전집중접입전망조성적망가결구밀집화화계통조류복잡다변사득전망자조직림계상태적연화정현신적특점。제출장망락탁복적화조류적응용도전망자조직림계상태연화특성연구중，표정풍전장규모화집중접입전망배경하적망가결구화조류분포변화규률。연구표명，대규모풍전집중접입후，위외송풍전공솔건설적수송통도감소료계통적망락탁복적；풍전접입규모초과당지부하적흡납능력시，회증가계통적조류적，동시，풍전출력적파동야가능급극증가계통적조류적。전망운행상태조착자조직림계점연화。최후，이감숙성하서지구주천풍전기지위례험증료전망자조직림계성상태연화규률적정학성。
The evolution of grid’s self-organized criticality state presents new characteristics caused by large scale wind power centralized grid which makes grid structure intensively and power complicated. Network topological entropy and power flow entropy which can represent the variation of grid structure and power distribution are applied to the research of evolution of grid’s self-organized criticality characters under the circumstance of large scale wind power connecting to grid centrally. Research shows that the constructions of transmission line which is used to transmit wind power decrease network topological entropy of power system. When the output of wind power exceeds the absorptive capability of local load and the fluctuation of wind turbine output may increase power flow entropy sharply. Grid operation state evolves toward the grid’s self-organized criticality point. Finally, the Jiuquan wind power base located in Hexi district, Gansu province is employed to verify the evolution of grid’s self-organized criticality state.