Control method for online dynamically restraining power grid low frequency oscillation and subsynchronous oscillation
A sub-synchronous oscillation and low-frequency oscillation technology, applied in the direction of reducing/preventing power oscillation, wind power generation, flexible AC transmission system, etc., to achieve the effect of solving sub-synchronous oscillation, stabilizing wind power generation system, fast active power and reactive power
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[0028] The scheme of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments:
[0029] refer to figure 1 , 2, the present invention is based on the given feedforward equivalent damping control strategy of static var generator online dynamic suppression of grid subsynchronous oscillation, including filtering and screening of active power components and reactive power components of grid subsynchronous oscillation, modal filtering The design and implementation of the controller, the design of the given feedforward equivalent damping control strategy and the overall control scheme of SVG to suppress subsynchronous oscillation.
[0030] The present invention is specifically realized through the following steps:
[0031] Step 1: Collect the grid current i through the current sensor and the voltage sensor of the static var generator respectively a , i b , i c and grid voltage v a , v b , v c , the grid curr...
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