摘要
光伏电源的出力受环境温度、光照强度等因素的影响,其输出功率具有不确定性,会导致光伏电源接入点的电压波动,甚至越限。采用定点迭代的配电网潮流算法,对三相不平衡的光伏并网发电系统进行了潮流计算。根据潮流计算结果,结合IEEE13节点馈线系统,研究了光伏电源接入容量的变化对配电网电压分布及网损的影响。研究结果表明,光伏电源渗透率增大到一定程度后就会产生反向的潮流,并且系统节点电压及功率损耗也会有大的变化。
The output of photovoltaic ceils is affected by environment temperature, solar irradiance and other factors, and its uncertainty leads to voltage fluctuations and even out of range at the access points of the PV systems. Fixed-point iteration method is introduced and the power flow of three-phase unbalanced grid-connected PV system is calculated. Then according to the power flow calculation results and combined with the IEEE13 node feeder system, the changes in the grid voltage and power losses are researched with the different capacities of PV. Finally it can be shown that the trend of power flow will reverse when the PV power penetration increases to a certain extent, and the system node voltage and power loss have changed a lot.
出处
《可再生能源》
CAS
北大核心
2013年第4期11-14,19,共5页
Renewable Energy Resources
基金
山西省自然科学基金项目(2010011024-1)
关键词
光伏电源
光照强度
潮流计算
定点迭代法
系统损耗
photovohaic cells
solar irradiance
power flow
fixed-point iteration method
power loss
