考虑DG、DS和EV协同运行的配电网无功优化方法

doi:10.11985/2017.08.007

摘要/Abstract

摘要：

综合考虑分布式电源、电动汽车充放电和分布式储能运行的协调配合,并与不同类型无功补偿装置输出无功功率的协同控制,以配电网有功网损及电压波动量最小化为目标函数,建立配电网无功优化的多目标优化模型。考虑风速的概率特性、日照强度的不确定性、荷电状态和充放电特性以及运行效率,构建分布式风电机组出力、光伏发电系统出力、电动汽车充放电功率以及储能装置充放电功率的随机模型。选择DG、DS和EV等无功功率作为控制变量,采用遗传算法对优化问题进行求解。仿真计算表明了本文构建的无功优化模型的适应性和所提算法的可行性和有效性。

关键词: 新能源配电网, 无功优化, DG、DS和EV协同运行, 无功补偿装置

Abstract:

A reactive power optimization model is presented considering operation coordination of distributed generation, electric vehicle charging and distributed storage systems, and coordinative control of DG, DS, EV and other different types of reactive power compensation devices in power distribution network. In the proposed model, power loss and voltage fluctuation minimization is taken as the objective function. Considering the probabilistic characteristics of wind speed, the uncertainty of sunshine intensity, charge state and charge discharge characteristics,and the operation efficiency, a stochastic probabilistic model is constructed for power output of distributed wind turbine power output of PV system, charging and discharging power of electric vehicle, and charging and discharging power of energy storage device. The reactive power of DG, DS and EV is chosen as control variable, and genetic algorithm is used to solve the optimization problem. The simulation results show the adaptability of the proposed reactive power optimization model, and the feasibility and effectiveness of the proposed algorithm.

Key words: Distribution grids with renewable energy, reactive power optimization, coordinative operation of DG、DS and EV, reactive power compensation devices

中图分类号:

TM315

陈嘉威,吴杰康,郭清元,赵守安,徐宏海. 考虑DG、DS和EV协同运行的配电网无功优化方法[J]. 电气工程学报, 2017, 12(8): 42-49.

Chen Jiawei,Wu Jiekang,Guo Qingyuan,Zhao Shouan,Xu Honghai. Reactive Power Optimization Method for Distribution Network Considering DG, DS and EV Cooperative Operation[J]. Journal of Electrical Engineering, 2017, 12(8): 42-49.

图/表 3

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控制变量	最优值
无功补偿/kvar	309.7
储能放电（节点3）/kW	26
储能放电（节点26）/kW	29
电动汽车放电（节点3）/kW	38.7
电动汽车放电（节点26）/kW	48.4
DG无功输出（节点3）/kvar	154.8
DG无功输出（节点26）/kvar	206.5