Using double Fed induction generator to enhance voltage stability and solving economic issue

Traditionally, ancillary market is supported by a lot of conventional generators to produce or use reactive power with the purpose enhance voltage stability. However, in recently years, with the penetration of new wind generations (Double Fed Induction Generator (DFIG) and Direct Drive Synchronous Generator (DDSG)) and through different set of control possibility, wind power plants are able to partly participate in the provision of the ancillary market for control frequency and voltage. However, economic issue is one of a particular big challenge. Therefore, this paper study the method to calculate the price of reactive power with the purpose support wind farm provide reactive power in order to increase voltage stability for power system based on locational marginal price. This study used the Power World Program to simulate wind generator (DFIG) and calculate the locational marginal price. A sample wscc_9bus_Wind-DFIG is used to show the change of benefit of wind generator when the increasing load is applied.