摘要
配电网中本地可控发电资源能量有限,光伏和风电等可再生能源发电(variable renewable energy-distributed generation,VRE-DG)在天气条件良好时出力可观,可为大电网停电事故后配电网应急供电恢复提供有力支撑。然而,失去大电网支撑的电气孤岛抗扰动能力弱,而VRE-DG出力具有不确定性,如处理不当则会造成功率失衡甚至恢复失败。计及VRE-DG的配电网应急供电恢复策略,通过在每个时段初期求解多时段恢复模型和优化运行模型确定该时段的恢复策略和最优运行状态。算例表明,该策略可最小化VREDG出力不确定性带来的风险,充分利用VRE-DG对重要负荷供电。
In distribution systems, the energy stored in local controllable distributed generations is usually limited. In contrast, considerable energy can be obtained from variable renewable energy-distributed generation(VRE-DG) resources, such as photovoltaic cells and wind power, under suitable weather conditions. Thus, VRE-DG can be used to restore the power supply from distribution systems in extreme poweroutage scenarios. However, the resulting electrical island, without support from bulk grids, is susceptible to disturbances, and the VRE-DG output is uncertain. This may result in powersupply imbalance or even restoration failure. To address these concerns, this paper presents an emergency power-supplyrestoration strategy. By solving the multi-period restoration and optimal operation models at the beginning of each period, the proposed method is used to determine the restoration strategy and optimal operating state of the period. The results of case studies reveal that the proposed method minimizes the risk of restoration failure due to VRE-DG uncertainty, thereby facilitating the provision of necessary support from VRE-DG for power-supply restoration.
作者
刘家妤
张琪祁
王颖
许寅
LIU Jiayu;ZHANG Qiqi;WANG Ying;XU Yin(State Grid Shanghai Electrical Power Company Research Institute,Shanghai 200437,China;School of Electrical Engineering,Beijing Jiaotong University,Beijing 100044,China)
出处
《全球能源互联网》
2020年第6期600-606,共7页
Journal of Global Energy Interconnection
基金
国家电网公司科技项目(B30940190000)
关键词
配电网恢复
韧性
可再生能源
优化决策
distribution-system restoration
resilience
renewable energy
optimal decision-making