地区电网光伏消纳能力的提升策略

针对大规模光伏发电功率倒送造成传输通道发生阻塞的问题,提出一种传输通道潮流评估模型。利用传输通道负载率期望评估传输通道的负载率水平,利用传输通道潮流熵确定传输通道功率波动剧烈程度,在此基础上采用传输通道阻塞二维评定等级值判定传输通道发生阻塞的可能性大小。应用模糊数学的隶属度函数来决策消纳能力提升措施类型,利用逐步扩展法和灵敏度系数法分别指导网络解与非网络解的实施。通过某地区实际电网算例对所提方法的有效性进行了验证。

Promotion strategy of photovoltaic accommodation ability for regional power grid

Aiming at the problem of transmission channel obstruction caused by large-scale photovoltaic power reversal, a power flow evaluation model for transmission channel is proposed. The load rate expectation of transmission channel is adopted to evaluate the load rate level, and the power flow entropy of transmission channel is used to determine the power fluctuation intensity, on this basis, the two-dimensional evaluation level of transmission channel obstruction is adopted to judge the possibility of blocking in the transmission channel. The membership function of fuzzy mathematics is applied to determine the type of accommodation ability promotion measure, and the stepwise expansion method and sensitivity coefficient method are used to guide the implementation of network solution and non-network solution respectively. The validity of the proposed method is verified by an actual power grid in a region.