CAJ | 학술논문

大量分布式光伏接入配电网可能引起电网电压偏差越限。首先建立了不同分布规律下负荷引起的电压损失计算模型和光伏引起的电压抬升计算模型，在母线电压偏差可达标准上限的前提下，导出了线路不出现过电压时允许接入的最大光伏容量。针对10 kV典型线路，给出了光伏与负荷相同分布规律下的最大光伏渗透率和不引起过电压条件下的馈线首端电压裕度。结果表明，架空线路比电缆线路可接纳更大的光伏容量，利用光伏电源的调压作用可防止过电压，降低母线电压可允许接入更多光伏容量。
대량분포식광복접입배전망가능인기전망전압편차월한。수선건립료불동분포규률하부하인기적전압손실계산모형화광복인기적전압태승계산모형，재모선전압편차가체표준상한적전제하，도출료선로불출현과전압시윤허접입적최대광복용량。침대10 kV전형선로，급출료광복여부하상동분포규률하적최대광복삼투솔화불인기과전압조건하적궤선수단전압유도。결과표명，가공선로비전람선로가접납경대적광복용량，이용광복전원적조압작용가방지과전압，강저모선전압가윤허접입경다광복용량。
Large amount of distributed PV generators connected into distribution feeder will cause the out-of-limit of voltage deviation. The calculation models of voltage drop caused by loads and voltage rise caused by PV generator are established under different loads or PV distribution along the line, and the maximum PV power injected into the feeder without causing over-voltages is proposed assuming the bus voltage deviation is reaching the upper limit. The maximum PV penetration level of 10 kV typical distribution line is derived under the condition that PV generation is of the same power distribution rule with load, and the voltage margin at the head end of feeder without causing over-voltage is provided. The analysis results show that over-head line can carry more PV power than cable, over-voltage will be avoided by controlling the PV power according to the connection point voltage, and suitably lowering the bus voltage will also allow more PV connecting to the feeder.