High-frequency oscillation suppression method and device for new energy storage system
An energy storage system, high-frequency oscillation technology, applied in circuit devices, reducing/preventing power oscillation, power transmission AC network, etc., can solve problems such as poor suppression effect, achieve high-frequency oscillation suppression, good suppression effect, and improve the system The effect of running stability
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Embodiment 1
[0067] Embodiment 1 of the present invention provides a high-frequency oscillation suppression method for a new energy storage system, the specific flow chart is as follows figure 1 As shown, the specific process is as follows:
[0068] S101: Obtain the AC voltage of the grid-connected point of the new energy storage system in the VSC-HVDC system and the output current of the VSC-HVDC system;
[0069] S102: Determine the modulation voltage of the sending end converter station in the VSC-HVDC system based on the AC voltage of the grid-connected point of the new energy storage system and the output current of the VSC-HVDC system;
[0070] S103: Suppress the high-frequency oscillation of the new energy storage system based on the modulation voltage of the sending-end converter station.
[0071] Based on the AC voltage of the grid-connected point of the new energy storage system and the output current of the VSC-HVDC system, the modulation voltage of the sending-end converter sta...
Embodiment 2
[0107] Based on the same inventive concept, Embodiment 2 of the present invention also provides a high-frequency oscillation suppression device for a new energy storage system, such as Figure 4 shown, including:
[0108] The obtaining module is used to obtain the AC voltage of the grid-connected point of the new energy storage system in the VSC-HVDC system and the output current of the VSC-HVDC system;
[0109] The determination module is used to determine the modulation voltage of the sending end converter station in the VSC-HVDC system based on the AC voltage of the grid-connected point of the new energy storage system and the output current of the VSC-HVDC system;
[0110] The suppression module is used to suppress the high-frequency oscillation of the new energy storage system based on the modulation voltage of the converter station at the sending end.
[0111] Identify modules include:
[0112] The transformation module is used for coordinate transformation of the AC v...
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