A DC Power Flow Controller
A DC power flow and controller technology, applied in the direction of power transmission AC network, etc., can solve the problem of many switching devices, achieve the effects of fewer switching devices, simple circuit structure, improved control ability and transmission line transmission capacity
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[0022] The present invention will be further described below in conjunction with the accompanying drawings.
[0023] The present invention is applicable to multi-terminal (three-terminal and more than three-terminal) high-voltage direct current transmission systems, and the following only takes three-terminal direct current transmission systems as an example to describe in detail.
[0024] A three-terminal DC power transmission system comprising a DC power flow controller of the present invention such as figure 1 As shown, VSC3 operates in constant DC voltage mode, and VSC1 and VSC2 operate in constant power mode. The DC power flow control scheme includes two converters, and the converters are installed in the converter station VSC2. The output of the converters (V x and V y ) are respectively connected in series in the two transmission lines at VSC2. The equivalent circuit of the three-terminal DC transmission system including the DC power flow control method of the presen...
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