Static var generator (SVG)-based given feedforward control method for dynamically inhibiting power grid subsynchronous oscillation
A technology of subsynchronous oscillation and control method, which is applied in the direction of flexible AC power transmission system, multiphase network asymmetry reduction, multiphase network elimination/reduction of asymmetry, etc., and can solve subsynchronous oscillation without fully controlled power devices The suppression effect is limited and other problems, to achieve the effect of solving the problem of subsynchronous oscillation, low cost and easy to implement
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[0041] Such as figure 1 As shown, this embodiment provides a given feed-forward control method based on SVG for online dynamic suppression of power grid subsynchronous oscillation, which includes the following steps:
[0042] S100. Acquire the grid three-phase current i a ,i b ,i c .
[0043] Preferably, the built-in current sensor of SVG is used to realize the three-phase current i of the power grid a ,i b ,i c collection.
[0044] S200. The grid three-phase current i a ,i b ,i c Transformed into the actual value of active current i d and the actual value of reactive current i q .
[0045] Preferably, step S200 is specifically: make the grid three-phase current i in the three-phase static coordinate system a ,i b ,i c Through the abc / dq coordinate transformation, the actual value i of the active current in the two-phase rotating coordinate system is obtained d and the actual value of reactive current i q .
[0046] Specifically, for the grid three-phase curren...
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