This paper aims at the problem that the traditional linkage control of doubly fed fan is difficult to realize voltage support due to the voltage fluctuation of parallel network of doubly fed fan. A reactive power linkage control strategy of energy storage doubly fed induction generator（DFIG） and static var generator（SVG） is proposed. According to the reactive power demand in case of voltage drop at the parallel node

the energy storage DFIG is linked with SVG to carry out reactive power compensation by stages. In the first stage

the reactive power support is completed by the unit itself

the grid side converter is converted from the unit power factor mode to the reactive power compensation mode and the remaining reactive power deficiency is put into SVG to assist the unit in reactive power compensation.In the second level

the reactive power capacity allocated to the wind turbine is distributed to each unit one by one

according to the real-time regulation range of reactive power of each unit. When the voltage drop of the parallel node is greater than 30%

it is necessary to consider putting the super capacitor into operation to ensure the normal operation of the unit. The simulation results show that the strategy can suppress 15% voltage drop when the voltage drop is 30%; 98% reactive power and voltage support can be realized within 2 seconds

which can quickly and effectively improve the low-voltage ride through capability of doubly fed wind farm.