An integrated system of communicating energy storage devices for supplying an alternate power source to operating systems for a wind turbine connected to an electrical grid, the integrated system comprising: at least one wind turbine with a rotor, the wind turbine being connected to an electrical grid; at least one operating system (525,581,582) of the at least one wind turbine requiring an alternate power source during a wind turbine operating condition; a plurality of energy storage devices (431,432,433) capable of supplying the alternate power source; and a system of accumulators for providing communication of energy storage between at least two of the plurality of energy storage devices (431,432); wherein the plurality of energy storage devices (431,432,433) comprise: at least two energy storage devices, capable of supplying the alternate energy power source, being selected from a group consisting of a pneumatic accumulator, an electrical energy accumulator, a mechanical accumulator; and a chemical energy accumulator; characterised by: a hydraulic converter (121,125) operatively connected between a rotor and a generator in a wind turbine main drive train; and a hydraulic accumulator operatively coupled to the hydraulic converter (121,125), wherein when a wind turbine operating condition is normal wind turbine operation accompanied by short term irregularities of less than about 1 second duration for grid feed-in power, the hydraulic accumulator supplies power to the hydraulic converter (121,125), driving a generator to reduce the irregularities in a power grid, and wherein the wind turbine operating condition is a short-term disturbance on the grid of about 1 second to about 20 seconds duration in which the grid accepts less than the full output from the wind turbine, the excess power from the wind turbine is converted to pressure accumulation in the hydraulic accumulator, such that the hydraulic accumulator assists with low voltage ride through capability, wherein the hydraulic accumulator is tied to other energy storage devices and/or energy sources that are controlled to replenish or sustain the hydraulic accumulator. at least one wind turbine with a rotor, the wind turbine being connected to an electrical grid; at least one operating system (525,581,582) of the at least one wind turbine requiring an alternate power source during a wind turbine operating condition; a plurality of energy storage devices (431,432,433) capable of supplying the alternate power source; and a system of accumulators for providing communication of energy storage between at least two of the plurality of energy storage devices (431,432); wherein the plurality of energy storage devices (431,432,433) comprise: at least two energy storage devices, capable of supplying the alternate energy power source, being selected from a group consisting of a pneumatic accumulator, an electrical energy accumulator, a mechanical accumulator; and a chemical energy accumulator; characterised by: a hydraulic converter (121,125) operatively connected between a rotor and a generator in a wind turbine main drive train; and a hydraulic accumulator operatively coupled to the hydraulic converter (121,125), wherein when a wind turbine operating condition is normal wind turbine operation accompanied by short term irregularities of less than about 1 second duration for grid feed-in power, the hydraulic accumulator supplies power to the hydraulic converter (121,125), driving a generator to reduce the irregularities in a power grid, and wherein the wind turbine operating condition is a short-term disturbance on the grid of about 1 second to about 20 seconds duration in which the grid accepts less than the full output from the wind turbine, the excess power from the wind turbine is converted to pressure accumulation in the hydraulic accumulator, such that the hydraulic accumulator assists with low voltage ride through capability, wherein the hydraulic accumulator is tied to other energy storage devices and/or energy sources that are controlled to replenish or sustain the hydraulic accumulator. a hydraulic converter (121,125) operatively connected between a rotor and a generator in a wind turbine main drive train; and a hydraulic accumulator operatively coupled to the hydraulic converter (121,125), wherein when a wind turbine operating condition is normal wind turbine operation accompanied by short term irregularities of less than about 1 second duration for grid feed-in power, the hydraulic accumulator supplies power to the hydraulic converter (121,125), driving a generator to reduce the irregularities in a power grid, and wherein the wind turbine operating condition is a short-term disturbance on the grid of about 1 second to about 20 seconds duration in which the grid accepts less than the full output from the wind turbine, the excess power from the wind turbine is converted to pressure accumulation in the hydraulic accumulator, such that the hydraulic accumulator assists with low voltage ride through capability, wherein the hydraulic accumulator is tied to other energy storage devices and/or energy sources that are controlled to replenish or sustain the hydraulic accumulator.