风光互补发电工程无功补偿容量配置及影响因素分析

Factors Analysis of Reactive Power Compensation Capacity for Wind-Solar Hybrid Power Generating Project

以由49.5 MW风电场和48 MW光伏电站构成的风光互补发电工程为例,结合无功出力能力、送出线路电压等级和送出线路长度,根据线路及设备的计算参数,进行无功补偿容量配置计算。结合计算结果,分析对无功补偿容量配置产生影响的3个因素,风光互补发电工程无功出力对无功补偿容量影响较大,计算时应根据风电机组或光伏逆变器的无功出力能力做无功出力安排;风光互补发电工程以110 kV接入系统比以220 kV接入系统需配置的容性无功补偿容量大,而需配置的感性无功补偿容量小;随着送出线路长度的增加,风光互补发电工程以110 kV和220 kV电压等级接入电网,容性和感性无功补偿容量配置比例的增减变化趋势与发电工程总容量有关。

Take a wind-solar hybrid power generating protect as an example, the wind-solar hybrid power generating composed of 49.5 MW wind farm and 48 MWp photovoltaic power plant, combing three influenced factors on reactive power compensation capacity, including reactive power capability, voltage level and power line length, based on the calculating parameters of line and equipment. The ananlysis of calculating result showed that： firstly, the reactive power compensation capacity is influenced heavily by reactive power output of the wind-solar hybrid power generating; secondly, the capacitive reactive power compensation capacity with 110 kV is higher under the conditions of access system voltage rank with 220 kV, but the inductive reactive power compensation capacity is lower; thirdly, with the increase of power line length, wind-solar hybrid power generating project access system voltage rank with 110 kV and 220 kV, the variation trend of reactive power compensation capacity proportion has a relationship with the total capacity of power engineering.