摘要
随着配电网的建设和发展,以光伏为代表的分布式电源(distributed generation,DG)的渗透率逐渐提高,能为配电网的供电恢复提供短时支撑。然而,分布式电源出力的随机性给供电恢复的可靠性带来了新的挑战,可能造成已恢复区域出现二次甩负荷现象。基于此,文章以光伏为例,利用时变性衡量随机性,提出了一种考虑分布式电源出力时变性的配电网短时供电恢复策略。建立考虑SOP的配电网供电恢复模型;以该供电恢复模型为基础,基于光伏出力预测的配电网供电恢复策略的原理,以改进的IEEE-33节点模型为例,验证所提策略能降低光伏出力时变性对供电恢复可靠性的影响。结果表明所提策略能够提高故障后恢复方案的调用速度,对提高配电网供电恢复的可靠性具有积极意义。
With the construction and development of distribution network,the penetration rate of distributed generation(DG)represented by photovoltaics is gradually increasing.It becomes possible that DGs provide short-term support for power supply restoration in distribution network.However,the randomness of DG output brings new challenges to the reliability of power supply restoration,such as the possibility of secondary load shedding in the restored area.On this basis,this paper takes photovoltaic as an example and uses time variation to measure randomness,and proposes a short-term power supply restoration strategy for the distribution network considering the time variation of DG output.Firstly,a power supply restoration model for the distribution network with SOP is established.Then,based on the power supply restoration model,the principle of the power supply restoration strategy for distribution network based on the forecast of photovoltaic output is introduced,and the decision-making process of the power supply restoration plan is elaborated.Finally,the improved IEEE33 node model is taken as an example to verify the proposed restoration strategy,which can reduce the time-variation effect of the photovoltaic output on the reliability of the power supply restoration.The results show that the proposed strategy can improve the call speed of the recovery plan after a failure,and it has positive significance for improving the reliability of the power supply recovery of distribution network.
作者
侯祖锋
丘冠新
曹安瑛
赵瑞锋
李波
陈建钿
HOU Zufeng;QIU Guanxin;CAO Anying;ZHAO Ruifeng;LI Bo;CHEN Jiantian(Zhuhai Power Supply Bureau,Guangdong Power Grid Corporation,Zhuhai 519000,Guangdong,China;Power Dispatching Control Center,Guangdong Power Grid Corporation,Guangzhou 510600,China)
出处
《电测与仪表》
北大核心
2024年第8期90-96,共7页
Electrical Measurement & Instrumentation
基金
南方电网公司科技项目(030400KK52190115(GDKJXM20198145))。
关键词
配电网
光伏发电
时变性
智能软开关
供电恢复
distribution network
photovoltaic power generation
time variation
soft open point(SOP)
power supply restoration
