Parameter design method for high-voltage high-capacity VSC (voltage source converter)
A voltage source converter, parameter design technology, applied in AC network to reduce harmonics/ripple, harmonic reduction devices, etc., can solve the problem of difficult to accurately realize the control target of the converter, and avoid the problem of power loss , The effect of meeting the requirements of grid-connected power quality
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[0043] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0044] The main circuit topology of three-phase voltage source converter (VSC) using LCL filter is as follows: figure 1 As shown, the LCL filter includes a grid-side reactor, a valve-side reactor, and a filter capacitor connected in parallel between the valve-side reactor and the grid-side reactor.
[0045] The parameters involved in the LCL filter for high-voltage and large-capacity converters include the reactance value of the valve-side reactor, the reactance value of the grid-side reactor, the short-circuit resonant frequency, the open-circuit resonant frequency and the capacitance value of the filter capacitor. Its design method is:
[0046] (1) Calculate the reactance value parameters of the valve side reactor. The inductance of the valve side reactor is obtained by using the power operating range of the voltage ...
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