基于广义注入电流节点模型的配电网潮流计算

摘要

通过引入广义注入电流节点模型，提出了一种改进的可兼顾分布式电源场景和弱环网场景的配电网潮流算法。首先，基于现有理论将各类分布式电源的注入功率和弱环网断点所在支路的交换功率变换为广义注入电流，从而实现将含分布式电源和弱环网的复杂配电网转换为常规的辐射状配电网；然后，分析了各类注入电流在每次迭代计算时的求解方法；进一步，设计了二维辐射状配电网模型的动态存储结构及改进的前推回代法；最后，利用 VC++编程语言和 MS SQL SERVER 数据库研制了相应的配电网潮流计算系统并以此系统进行了算例研究。算例结果表明：相对于现有算法，所改进的配电网潮流算法在计算速度上有一定的提高，同时也更容易实现。%By defining generalized injecting current node model, an improved power flow method is presented, which could be supplied into distribution network with weakly meshed network and distribution generation at the same time. Firstly, based on current theory, both the injecting power of DG and the breakpoint branch exchanging power are represented as generalized injecting current, so the complex distribution network with DG of PV and weakly meshed network are changed into traditional radial distribution network;then, the methods for calculating different generalized injecting current at the end of each iterative step are analyzed;further, the two dimension dynamic storage structure of radial distribution network model is designed and the improved forward/backward sweep method is presented;lastly, this corresponding power flow calculation system is developed based on VC++program language and MS SQL SERVER database system, and with this software system the example research is done. The calculating result has proved that the calculating speed is accelerated and the method is more easily to be realized.