文章摘要
苏粟,胡勇,王玮,等.基于电动汽车无功补偿的配电网电压调控策略[J].电力系统自动化,2017,41(10):72-81. DOI: 10.7500/AEPS20160915001.
SU Su,HU Yong,WANG Wei, et al.Voltage Regulation Strategy for Distribution Network Based on Reactive Power Compensation of Electric Vehicles[J].Automation of Electric Power Systems,2017,41(10):72-81. DOI: 10.7500/AEPS20160915001.
基于电动汽车无功补偿的配电网电压调控策略
Voltage Regulation Strategy for Distribution Network Based on Reactive Power Compensation of Electric Vehicles
DOI:10.7500/AEPS20160915001
关键词: 电动汽车  充电机运行功率因数  无功补偿  电压调控模型  充电机运行特性  出行行为特性
KeyWords: electric vehicles  operating power factor of charger  reactive power compensation  voltage regulation model  operating characteristic of charger  characteristic of travel behavior
上网日期:2017-03-28
基金项目:国家自然科学基金资助项目(51677004);中央高校基本科研业务费专项资金资助项目(E16JB00140)
作者单位E-mail
苏粟 北京交通大学国家能源主动配电网技术研发中心, 北京市 100044  
胡勇 北京交通大学国家能源主动配电网技术研发中心, 北京市 100044 14121415@bjtu.edu.cn 
王玮 北京交通大学国家能源主动配电网技术研发中心, 北京市 100044  
王世丹 国网北京市电力公司海淀供电公司, 北京市 100000  
摘要:
      大规模电动汽车充电负荷将加重局部配电网节点电压偏离标称电压程度,且在时间和地点上具有随机性,传统无功补偿方式虽能解决上述问题但经济性较差。因此,提出了一种基于电动汽车无功补偿的电压调控策略,该策略通过有效调节充电机的运行功率因数,对节点进行无功补偿的同时改变充电有功功率,从而在保证节点电压安全稳定的同时又不降低配电网经济性。通过分析符合国内一二线城市特征的工作区域的出行行为特性和充电机变功率因数运行特性,计算了充电机运行功率因数的可调控范围,进而提出了以接入某节点的所有电动汽车充电机运行功率因数为优化变量,以减小节点电压与额定值差距、减小电压波动、电动汽车单位时间段内充入电量尽可能多为优化目标的节点电压调控模型,并采用免疫优化算法对该模型进行求解。最后以实际局部配电网为例,通过仿真验证了该策略的有效性。
Abstract:
      Large scale charging load of electric vehicles will increase the degree of the deviation between node voltage and nominal voltage in a local distribution network, and the deviation which caused by the charging load is random on time and place, traditional reactive compensation method can solve the above problem, but the economy is bad. So a voltage control strategy based on reactive power compensation by electric vehicles is proposed, which aims at implementing reactive power compensation for distribution network and changing the charging active power at the same time through regulating the operating power factor of the chargers effectively. The strategy can ensure the security and stability of the node voltage and the efficiency of distribution network will not decrease. A strategy is proposed to calculate the controllable scope of operating power factors of chargers after analyzing the travel behavior characteristic in a working area of first-tier/second-tier city in China and the operating characteristic of charger. Then, the node voltage regulation model is used which considers all operating power factors of chargers as variables and considers the following conditions as the optimization objective: the deviation between node voltage and nominal voltage is minimum, the variance of the node voltage from current time to all time before is minimum, the state of charge charged in at unit duration is maximum. Finally, immune algorithm is used to get the values of variables. The rationality of the proposed node voltage regulation strategy can be validated through the simulation. This work is supported by National Natural Science Foundation of China(No. 51677004)and Fundamental Research Funds for the Central Universities(No. E16JB00140).
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