On the base of the fujian power system that has the special configuration of " large power generator with small power system " in 2000 , constructs power system models of fujian and fujian interconnected with other parts , does a lot of calculation and analysis and simulation , researches the security mechanism and rule of the fujian special power system interconnected with large power system . the above connection can keep security and stability and can make obvious benefits , but when the transmission power reach to excessive quantity the main power grid will increases interconnected flow - in or flow - out exchange power load . the power operation state tended to instability ; the infirmable interconnection make s the damp infirmable 本文以2000年前后具有“大机组小电网”特殊结构的福建电力系统为背景，建立了福建电力系统及其与外部互联的数学模型，开展大量的仿真计算分析，研究了“大帆组小电网”电力系统与大容量电力系统互联偏弱的安全稳定性的机理和规律：前述互联可以安全稳定运行，取得显著效益，当传输功率达到一定量后，主网架增加了送出或吸收互联交换功率的负载，系统运行状态向稳定性水平有所下降的方向转移；联络偏弱使阻尼偏弱，联络线小幅低频振荡和大幅低频振荡易被激发，联络线一旦重载断开，系统高周或低调严重。
