Cascading-type STATCOM DC side capacitor voltage balance control method
A technology of DC side capacitance and control method, which is applied in flexible AC power transmission systems, electrical components, and output power conversion devices, etc. The effect of improving reliability, reducing control difficulty and increasing hardware cost
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[0069] The specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0070] The STATCOM DC-side capacitor voltage balance control method provided by the present invention is used to solve the control problem of cascaded static synchronous compensator (Static Synchronous Compensator, referred to as STATCOM) DC-side capacitor voltage balance, and can also be used to solve other cascade-based multi-voltage DC voltage balance control problem of power electronic equipment with flat inverter technology.
[0071] The H-bridge multilevel STATCOM includes three-phase six bridge arms, and each phase is a cascaded H-bridge. Such as figure 2 as shown, figure 2 It is a single-phase cascaded H-bridge multi-level STATCOM topology diagram. Each phase cascaded H-bridge includes a high-voltage bus, a low-voltage bus, a single-phase transformer T, a reactor L, a resistor Rs, N cascaded H-bridge units, N A DC side...
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