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Offshore full-direct-current wind power plant based on field side port starting resistor and starting method

A technology of starting resistors and wind farms, applied in the field of electric power, can solve the problems of long start-up time, complicated start-up steps, high cost, etc., and achieve the effect of safe start-up

Active Publication Date: 2021-04-09
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the offshore full DC wind farm and starting method based on the starting resistance of the field-side port provided by the present invention overcomes the high cost of medium and high-voltage DC circuit breakers in the prior art, complicated starting steps, and slow start-up time. longer defect

Method used

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  • Offshore full-direct-current wind power plant based on field side port starting resistor and starting method
  • Offshore full-direct-current wind power plant based on field side port starting resistor and starting method
  • Offshore full-direct-current wind power plant based on field side port starting resistor and starting method

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Embodiment 1

[0036]The embodiment of the present invention provides an offshore full-DC wind farm based on the start-up resistance of a field-side port, which is suitable for flexible start-up of the controllable charging of the full-DC wind farm in various scenarios. The embodiment of the present invention takes offshore as an example. figure 2 As shown, the full DC wind farm includes at least one collecting branch i=1~N, where N is a positive integer, each collecting branch is connected to at least one DC wind turbine, and the positive sub-branch and the negative sub-branch of each collecting branch The branches are respectively connected to the first resistor (R st-i-p ), the second resistance (R st-i-n ), the first resistance (R st-i-p ), the second resistance (R st-i-n ) respectively through the first isolation switch (DS i ~DS N ) positive and negative poles are connected to the positive and negative poles of the collecting bus, and the input terminal of the DC booster station i...

Embodiment 2

[0042] An embodiment of the present invention provides a start-up method for an offshore full DC wind farm based on field-side port start-up resistance, and based on the offshore full-DC wind farm based on field-side port start-up resistance of Embodiment 1, Figure 5 As shown, the startup method includes:

[0043] Step S1 : when the DC booster station is in the startup state, the wind farm station control system sends an input command to each DC wind turbine to control the DC wind turbine to be in the startup state.

[0044] In the embodiment of the present invention, the process of starting the DC booster station includes: starting the generator to establish a three-phase AC voltage auxiliary second power supply bus and a wind farm station control system; closing the second isolation switch (DS bus ), the third isolating switch (DS tr ), charge the HVDC transmission submarine cable, establish the grid-side port voltage of the DC booster station; close the first isolation sw...

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Abstract

The invention discloses an offshore full-direct-current wind power plant based on a field side port starting resistor and a starting method, the full-direct-current wind power plant comprises at least one collection branch, each collection branch is connected with at least one direct-current wind turbine generator, and a positive electrode sub-branch and a negative electrode sub-branch of each collection branch are connected with a first resistor and a second resistor respectively; the first resistor and the second resistor are connected with the anode and the cathode of the collection bus through the anode and the cathode of a first isolation switch respectively, the input terminal of the direct-current booster station is connected with the collection bus through a second isolation switch, and the output terminal of the direct-current booster station is connected with the converter station through a third isolation switch. The first resistor and the second resistor are arranged on the positive electrode sub-branch and the negative electrode sub-branch of each collection branch respectively, whether port voltage and current of the first resistor and the second resistor meet constraint conditions or not is judged, and when the constraint conditions are met, the direct-current wind turbine generator is started to work; therefore, safe starting of the full-direct-current wind power plant is realized without depending on a direct-current circuit breaker.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to an offshore full-DC wind farm based on a field-side port start-up resistance and a start-up method. Background technique [0002] The construction of offshore wind farms is an important way to develop and utilize offshore wind energy resources and promote the clean transformation of the energy structure. Offshore wind power needs to be transmitted through long-distance submarine cables before it can be connected to the onshore power grid. Affected by the distributed capacitance of the submarine cables, traditional high-voltage AC transmission is adopted. It is difficult for technology to achieve the effective delivery of large-scale offshore wind power. At present, offshore wind farms usually adopt the technical solutions of "35kV AC collection + offshore AC booster station + offshore flexible DC converter station" or "66kV AC collection + offshore flexible DC converter s...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/36
CPCH02J3/381H02J3/36H02J2300/28Y02E10/76Y02E60/60
Inventor 陈靖思阳岳希毛航银季兰兰程亭婷杨杰
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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