基于源荷状态的跨区互联系统协调优化调度

随着跨区互联结构的日益完善及分布式电源的大规模接入电网,为充分利用区域间现有调度资源的互补效益,研究了基于源荷状态的跨区互联系统协调优化调度。以送、受端电网总运行成本及网损为目标函数,首先根据送、受端源荷状态,判断送端储能设备充放电状态及功率跨区流动状态。其次,考虑实际系统运行的各项约束,利用改进的基于粒子群优化算法的多目标搜索算法寻优,优化送端储能充放电功率、跨区联络计划及受端调峰火电机组出力。最后,以中国新疆地区实际电网为算例进行仿真计算。仿真结果表明,所提跨区优化调度策略可显著提升送、受端电网运行效益,充分发挥互联区域的互济合作。

Coordinated and Optimal Scheduling of Inter-regional Interconnection System Based on Source and Load Status

With the continuing improvement of inter-regional interconnection structure and large-scale distributed generators connecting to power grid, the coordinated and optimal scheduling of inter-regional interconnection system based on source and load status is studied in order to fully utilize the complementary benefits of the existing scheduling resources. Firstly, taking the total operation cost and network loss of power grid at the sending-end and receiving-end as the objective functions, the charging and discharging states of energy storage device at the sending-end and the inter-regional power flow state are judged according to the source and load status at the sending-end and receiving-end. Secondly, considering the operation constraints of the actual system, the improved multi-objective search algorithm based on particle swarm optimization algorithm is used to optimize the charging and discharging powers of energy storage at the sending-end, the inter-regional interconnection plan and the output of the peak-shaving thermal power units at the receiving-end. Finally, the actual power grid in Xinjiang of China is used as an example for simulation calculations. The simulation results show that the proposed inter-regional optimal scheduling strategy can significantly improve the operation efficiency of the sending-end and receiving-end power grids, and give full play to the collaboration of interconnected regions.