L/O/G/OThe development and applications of reactive power compensation（RPC ）www.themegallery.comThe improvement of RPCNext plan123contentsThe application in PV system1www.themegallery.com1.1 the function of RPCimprove the power factordecrease unbalancebetween voltage and current restrain the power or frequency oscillationsimprove the voltage adjustmentWe have Learned!2benefit to the economical improvingwww.themegallery.com1.2 the development of RPCAt the end of 19th century, AC power transmission appeared1970s,the development of Power electronic devices1980s, full controlled electronic devices were createdDynamic reactive compensation began to operateShunt ReactorsSynchronous CondensersStatic Var CompensatorStatic SynchronousCompensator 3www.themegallery.comsupply the continuous reactive power1.large loss and noiseSVC1.use the thyristor to control the circuit 2.response quicklygenerate harmonicSTATCOM1.higher accurate of regulation2.higher operational flexibility1.high investment price4meritsshortcomings1.3 compare of reactive compensation devices2.control complexSC2.speed of respond is slowwww.themegallery.com2 the necessity in PV power systemPV system need reactive power compensation5unbalance of Three-phase loadpower/ frequency oscillationsinstability of voltagewww.themegallery.com2 the application in PV power system6www.themegallery.com3 the next plan1Study the principle of STATCOM deeply2Study the bifurcation theory 3Search the relationship between the bifurcation and voltage/frequency oscillation7L/O/G/O