Flexible direct current power transmission system of energy storage type offshore wind plant and fault ride-through method of flexible direct current power transmission system
A DC fault ride-through and power transmission system technology, applied in wind power generation, power transmission AC network, electrical components, etc., can solve the problems of high manufacturing cost, complex structure, and high requirements for sub-module integration, and achieve improved utilization and communication requirements. Low, cost-reducing effect
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Embodiment 1
[0048] seefigure 1 , an energy storage type offshore wind farm flexible direct transmission system includes:
[0049] The offshore wind turbine is connected to the subsea AC cable through the wind turbine side transformer to connect to the confluence bus of the offshore confluence booster station; the confluence bus connects the cable to the step-up transformer to connect to the offshore converter station; the offshore converter station is connected to the onshore converter through the submarine DC cable Station connection; the onshore converter station is connected to the onshore AC power grid through the onshore AC cable.
[0050] The offshore converter station is equipped with a fault detection module and an offshore fault ride-through module; the onshore converter station is equipped with an onshore fault ride-through module. The fault detection module communicates with the offshore fault ride-through module to determine whether a DC fault occurs, and sends a fault signal ...
Embodiment 2
[0054] On the basis of Embodiment 1, the offshore converter station is connected with a DC voltage acquisition module. The DC voltage acquisition module collects the DC voltage data of the primary side of the offshore converter station and sends it to the DC fault detection module.
Embodiment 3
[0056] On the basis of Embodiment 1, the busbar of the offshore confluence booster station is electrically connected to a wind farm power acquisition module. The wind farm power collection module collects the wind farm output power P w sent to the energy storage control module. The energy storage module is electrically connected to the battery capacity acquisition module, and the battery capacity acquisition module detects the remaining capacity data of the energy storage module and sends it to the energy storage control module.
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