Energy consumption module, offshore wind power flexible DC transmission system, and fault ride-through strategy
A technology of offshore wind power and external transmission system, which is applied in wind power generation, power transmission AC network, conversion of AC power input to DC power output, etc., and can solve the problem of high cost, small change rate, du/dt and di/dt change rate Large and other problems, to achieve the effect of small loss, prevent rejection failure, and ensure communication
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[0015] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0016] see figure 1 , a new type of DC chopper energy consumption scheme and its fault ride-through strategy of the present invention, including wind farms and their auxiliary equipment, offshore converter stations and onshore converter stations, the MMC of the onshore converter stations integrates distributed DC chopper DCChopper. The electric energy sent by the offshore wind farm is sent to the onshore AC system through the offshore converter station, the DC cable, and the onshore converter station in sequence.
[0017] The flexible direct current transmission system can adopt the symmetrical unipolar wiring mode, and can also adopt the symmetrical bipolar wiring mode. The modular DC energy consumption device is integrated in a modular multilevel converter (MMC). Each DM sub-module contains an energy consumption resistor R, which evenly ...
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