基于能量流含P2G电-热系统风电消纳优化运行

OPTIMAL OPERATION OF WIND POWER ACCOMMODATION IN ELECTRIC-THERMAL SYSTEM WITH P2G BASED ON ENERGY FLOW MODEL

传统的电-热系统以流动的工质为热力系统的研究对象,误差较大,且与电力系统的研究对象和研究方法存在本质的差异,增加了电-热系统统一建模的复杂性。该文通过热电比拟的方法,从能量流的角度将热力系统转化为类似于电力系统的网络构架,以能量流动为分析对象,实现和电力系统的统一。以系统的成本最小为目标函数,建立含P2G的基于能量流的电-热系统风电消纳优化运行模型,对比采用P2G设备前后和不同风电占比下电-热系统的风电利用率及所带来的效益,通过算例证明P2G设备的引入对促进风电的消纳,减少系统的运行成本具有重要意义。

The characteristics of the wind power peak shaving and the"power determined by heat"mode in the heating season lead to serious wind curtailment,resulting in waste of energy.The emergence of power to gas(P2 G)technology has provided a new method for the wind power accommodation.The flowing working fluid is the research object of traditional electric-thermal system.There are large errors and essential differences between the research object and method of the electric power system,which increase the complexity of the unified modeling of the electric-thermal system.To realize the unification of power system,the thermal system will be transformed into a network structure like the power system from the perspective of energy flow by analogy of heat and electricity.Optimal operation model was established of wind power accommodation of electric-thermal system with P2 G based on energy flow model with the minimum cost as the objective function.The wind power utilization rate and the benefits of electric-thermal system were compared in P2 G technology and different wind power proportions.The introduction of P2 G technology has great significance to promote the wind power accommodation and reduce the operating cost of the system.