低效通信配电网的分布式电压控制

Distributed voltage control of low efficient communication distribution network

针对低效通信配电网的电压问题,结合模型预测控制(Model Predictive Control,MPC)方法提出了一种不依赖于高效通信的分布式电压控制系统,主要包括灵敏度计算、关键节点选取和指令分配三个模块。首先通过扰动分析法实现连续变量和离散变量电压灵敏度的精确计算,进而根据电压灵敏度计算结果定义节点的可观性、可控性和鲁棒性指标,综合评估后选出关键节点。然后以分布式电源容量利用比和慢速设备动作次数利用比为一致性变量实现指令分配。最后建立MPC模型并抽象为非线性混合整数规划问题求解,通过江苏某实际配电网验证了所提控制系统的有效性。

Aiming at the voltage problem of low-efficiency communication distribution network,a distributed voltage control system based on Model Predictive Control(MPC)is introduced.It mainly includes three modules of sensitivity calculation,key node selection and command distribution.First,the accurate calculation of the voltage sensitivity of continuous and discrete variables is realized by the disturbance analysis method.Then the observability,controllability and robustness indexes of the nodes are defined according to the voltage sensitivity calculation results,and the key nodes are selected after comprehensive evaluation.Then,the distributed power capacity utilization ratio and the slow equipment operation frequency utilization ratio are used as consistent variables to realize the command distribution.Finally,the MPC model is established and abstracted as a nonlinear mixed integer programming problem.The effectiveness of the proposed control system is verified through an actual distribution network in Jiangsu.