结合长庆油田吴起区块的伴生气发电网络,对网损、无功功率和可靠性等三个方面进行了分析。针对网损贡献度的概念对不同情况下的网损变化进行了计算,提出伴生气发电机组的无功影响率观点,分析了机组无功出力不足及线路功率因数不达标的原因,最后采用网络等值方法对伴生气发电并网前后的油田电网进行了可靠性评估。 Combined with the associated gas power generation network in Wuqi block of Changqing Oilfield, the paper analyzes the three aspects of network loss, reactive power and reliability. According to the concept of contribution of network loss, the change of network loss under different conditions was calculated. The viewpoints of reactive power of associated gas generating units were put forward. The reasons of insufficient reactive power output and line power factor were analyzed. Finally, Equivalent method is used to evaluate the reliability of the oilfield grid before and after the associated gas-fired power generation.