城市综合能源网统一前推回代能流计算方法

综合能源系统能流计算复杂且解耦后算法不统一，计及电力系统在综合能源系统中的核心地位，考虑将配电网常采用的前推回代法应用于城市综合能源网能流计算中并提出一种城市综合能源网统一前推回代能流计算方法。通过详细分析风电、光伏等新能源接入对实际配电网的影响以及热网的运行方式，对传统前推回代法进行改进，提高算法对实际电网和热网的适用性；对于天然气网络，采用解环的思想推导并得出线性化补偿气流法，实现对适用于天然气网络的前推回代法的改进。最后，采用算例验证所提算法的正确性并对综合能源系统静动态特性及风电消纳能力进行分析，算例结果表明该算法不仅实现了能流计算方法的统一，还具有编程简单、对初值要求不高等优点。

Unified energy flow calculation of back/forward sweep method in urban integrated energy system

The energy flow calculation of IES(Integrated Energy System) is complex and the algorithm is not uniform after decoupling, so taking into account the core position of the power system in IES, it is considered to apply the back/forward sweep method commonly used in distribution network to the urban IES, and a unified energy flow calculation of back/forward sweep method in urban IES is proposed. Through the detailed analysis of the impact of the integration of wind power, photovoltaic and other new energy sources on the actual distribution network and the operating mode of the heating network, the traditional back/forward sweep method is improved to increase the applicability of the algorithm to the actual power grid and heating network. For the natural gas network, the idea of de-looping is adopted to deduce and obtain the linearized compensated airflow method, so as to realize the improvement of the back/forward sweep method suitable for the natural gas network. Finally, the correctness of the proposed algorithm is verified, the static and dynamic characteristics of IES and the capacity of wind power absorption are analyzed through cases, and case results show that this algorithm not only realizes the unification of energy flow calculation methods, but also has the advantages of simple programming and low requirements for initial values.