A dynamic reactive power compensation and resonance suppression system for offshore wind farms

Abstract

The invention relates to a dynamic reactive power compensation and resonance suppression system for offshore wind farms, which has the functions of dynamic reactive power compensation, resonance suppression, voltage stability at the end of the power grid, and improvement of high / low voltage ride-through of wind farms, and can solve the problem of repetitive configuration of reactive power compensation, Low efficiency and reactive power circulation problems, making full use of the capacitive reactive power of submarine cables, saving investment and land occupation of offshore wind farms, eliminating resonance risks, ensuring safe and stable operation of the power grid, has significant technical and economic benefits.

Description

technical field [0001] The invention belongs to the field of offshore wind power generation, in particular to a dynamic reactive power compensation and resonance suppression system for an offshore wind farm. Background technique [0002] In recent years, as my country's onshore wind power construction technology has become increasingly mature and offshore wind power resources are more extensive, the national wind power development policy has gradually tilted towards offshore power generation. Compared with onshore wind farms, the advantages of offshore wind farms are mainly that they do not occupy land resources, are basically not affected by topography, have higher wind speeds, larger single-machine capacity of wind turbines, and higher annual utilization hours. Statistics show that China has become the world's largest wind energy producer. As of the end of April 2021, my country's offshore wind power grid-connected capacity reached 10.42 million kilowatts, surpassing the U...

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Problems solved by technology

[0007] Aiming at the deficiencies of the existing reactive power compensation device scheme of the offshore wind farm transmission system, the present invention proposes a dynamic reactive power compensation and resonance suppression system for the offshore wind farm, which has dynamic reactive power compensation, resonance suppression, stable voltage at the end of the power grid, and improved wind farm Functions such as high / low voltage ride-through can solve the problems of repeated configuration of reactive power compensation, low efficiency, and reactive power circulation, make full use of the capacitive reactive power of submarine cables, save investment and land occupation of offshore wind farms, and eliminate resonance risks, ensuring The safe and stable operation of the power grid has significant technical and economic benefits

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