实时电力交易下的新能源电网能量管理策略

Energy Management Strategy of Microgrid Based on Real-time Power Trading

新能源微电网由多种分布式能量源组成,并具有不同动态特性和多样的能源管理需求,其能量管理是十分复杂的问题。为了提高微电网能源供应的经济效益和环境效益,文中针对由多分布式能源组成的微电网、考虑实时电力交易,提出了能源管理优化策略。该研究针对各分布式能源的运行特性和约束条件,构建了实时交易下的微电网的运行成本和污染排放目标函数,并将多目标函数转换为单目标函数。采用一种改进的粒子群优化方法对目标函数进行优化,求得能量管理策略,并对各分布式能源单元进行最佳功率调度。仿真验证了该能量管理策略的有效性。

A microgrid consists of many sorts of distributed energy resource units with different dynamical characteristics and multiple management requirements,thus the energy management problem of a microgrid is very complex. In order to ensure the power supply with high economical and environmental benefits,this paper focused on the energy management strategy of the microgrid composed by many sorts of distributed energy resources. Based on the dynamical characteristics and constraint conditions of the distributed energy resources,considering real-time power trade,two objective functions regarding the operating cost and the pollution emission are constructed,respectively. Moreover,the multi-objective functions are transformed into single objective function. By using an improved particle swarm op-timization method,the energy management strategy is solved,so that the optimal power dispatches of all distributed energy resource are implemented. The validity of the proposed the energy management strategy is demonstrated by simulation results.