The Research On Interconnection Safety Stablility Of Big Unit-Small Electric Network And Large Capacity Electric Power System

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 interconnectedwith 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 makes the damp infirmable. It tend to makes low- fiequency oscillation or high-frequency oscillation, The fault of heavy-load interconnected line break will make the problem of power system high-cycle or low-cycle seriously.This paper suggests to limit the transmission power and also suggest some countermeasures to enhance security and stability of the system.This paper is useful for reference for security and stability of Fujian power system and power system interconnection in engineering.