Study About Wind Power Short Circuit And Impact On Power System Protection

A series of problem rises with the increasing of wind-generator capacity. the equipments match with the wind-electricity system are becoming more and complex. The serious problem is how to elect the type and disposition of' the protection equipment, for example,relay.Because the windy energy is promiscuouse and can' t be controlled,the short circuit of system poured by wind一electricity increases with the proportion of' wind-electricity in electricity system increasing. So the Simultaneity generator' s parameter of relay can' t be used partly.To these question, this article will give some theory analysis.(1) The 3-phase symmetrical short circuit fault near wind farm is set for theriotic and simulative study. The short circuit waveforms are compared between asynchronous wind turbine and DFIG,to evaluate the contribution of wind farm to system short curcuit current.(2) through operation of DFIG are presented——a crowbar protection circuit is often connected to the rotor windings to limit peak current s in the rotor during a voltage dip .simulative conclusion is compared between a crowbar protection circuit is often connected to the rotor windings and a crowbar protection circuit is not.result is crowbar protection circuit can protect electronics of wind turbine.(3) The power and current of wind farm dynamic process simulations have been studied in condition of variable velocity wind,in order to analyse variable velocity wind poure variable short circuit of system and impact on power system protection.(4) Study about an adaptive Relaying for the Protection of a Wind Farm Interconnected with power system. adaptive Relaying for the Protection add Protection adaptivity.(5) Study about wind farm become DG ,it impact on power system protection.(6) Impact of Dbcheng Wind Farm Integration on protection of Xinjiang Power Grid.