输配协同分布式电源最大接入容量计算方法

Transmission-distribution-network-coordinated Calculation Method of Maximum Integration Capacity of Distributed Generations

随着光伏、风机等分布式电源的迅速发展,输电网与配电网间的耦合关系大大增强。为适应日益增强的输配耦合关系,首先提出广义输配全局优化模型,确定模型的最优性条件。在此基础上,综合考虑火电机组、分布式电源、无功补偿装置,提出输配协同分布式电源最大接入容量计算模型。基于输配电网的不同特点,利用异构分解算法进行优化模型的求解,输配电网交替进行各自区域的优化计算,并通过边界节点电压、注入功率等参量构建辅助函数保证全网最优性条件满足。经算例测试,所提算法的准确度高,与其他分解算法相比收敛性能好,具有工程应用的价值。

With rapid development of distributed generations, such as photovoltaics and wind turbines, the coupling of transmission and distribution network is significantly increased. To adapt to this, a generalized global optimization model and optimal conditions of the model are correspondingly determined. On this basis, considering the thermal units, distributed generators and reactive power compensation devices, a transmission-distribution-network-coordinated calculation model of maximum integration capacity of distributed generations is proposed. Based on the different characteristics of transmission and distribution networks, heterogeneous decomposition algorithm is used to solve the optimization model. Optimization calculation for transmission and distribution networks is alternately carried out within their own regions, and an auxiliary function is constructed with the voltage and injected power of boundary nodes to ensure the optimal conditions of whole network satisfied. Case analysis shows that the proposed algorithm has higher accuracy and better convergence performance compared with other decomposition algorithms, and has engineering applicable values.