考虑电动汽车协同优化的电力系统灵活经济调度

Flexible and Economical Dispatching of Power System Considering Cooperative Optimization of Electric Vehicles

大规模电动汽车(EV)并网后,将对系统的安全运行构成挑战。由于EV运行约束的限制,传统经济调度问题也要重新分析。以总调度成本最优,计及短期优化过程中EV的时间和空间约束,建立了考虑EV协同运行的电力系统灵活经济调度模型。算例仿真结果表明,所提方法合理地调度了系统内资源,有效降低了总调度成本,考虑EV双运行模式(充/放电)的系统发电策略缓解了峰值负荷。另外,采用牛顿-拉夫逊法(NR)比近似损耗法更易获得经济的调度方案,EV并网后的协同运行极大提高了系统经济性和可靠性。

After large-scale electric vehicles(EV)are connected to the grid,it poses challenges to the safe operation of the system.Due to the constraints of EV operation,the traditional economic scheduling problem also needs to be reanalyzed.In the paper,a flexible economic dispatching model of power system considering EV cooperative operation is established based on the optimal total dispatching cost and the time and space constraints of EV in the short-term optimization process.The simulation results show that the proposed method can reasonably schedule the resources in the system,effectively reduce the total dispatching cost.The power generation strategy considering EV dual operation mode(charge/discharge)alleviates the peak load.In addition,the Newton-Raphson(NR)method is easier to obtain an economic dispatching scheme than the approximate loss method.The coordinated operation after EV grid connection greatly improves the economy and reliability of the system.