Coordination control method of VSC-HVDC (voltage source converter based high voltage direct current) alternating-current voltage-frequency for improving transient stability of alternating-current system
A VSC-HVDC, AC system technology, applied in the field of power system control, can solve problems such as unfavorable AC system transient stability and conflict
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[0054] In order to describe the present invention more specifically, the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0055] In order to realize the four transient control objectives and priority order of the VSC AC voltage-frequency coordinated control strategy, this embodiment redesigns the VSC-HVDC control characteristics.
[0056] Such as figure 1 In the schematic diagram of the VSC basic structure shown, U s is the effective value of the AC voltage of the bus on the VSC network side, u sj Respectively, the three-phase AC voltage of the VSC grid-side bus, u sd and u sq are the d-axis component and q-axis component of the three-phase AC voltage of the VSC grid-side bus, respectively, i sj are the three-phase AC current at the outlet of the VSC grid side, i vd and i vq are the d-axis component and q-axis component of the three-phase AC current on the VSC valve si...
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