Offshore full-direct-current wind power plant based on machine end starting resistor and starting method of offshore full-direct-current wind power plant

A technology for starting resistance and wind farms, applied in parallel operation of DC power supplies, etc., can solve problems such as complex starting methods, and achieve the effects of simple and reliable control strategy, short time consumption, and simple steps.

Active Publication Date: 2021-04-13
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that the starting method of the offshore full DC wind farm based on the starting resistance of the machine terminal is too complicated, thereby providing an offshore full DC wind power plant based on the starting resistance of the machine terminal. Fields and how to start them

Method used

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  • Offshore full-direct-current wind power plant based on machine end starting resistor and starting method of offshore full-direct-current wind power plant
  • Offshore full-direct-current wind power plant based on machine end starting resistor and starting method of offshore full-direct-current wind power plant
  • Offshore full-direct-current wind power plant based on machine end starting resistor and starting method of offshore full-direct-current wind power plant

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specific Embodiment approach

[0030] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0031] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, ...

Embodiment 1

[0035] The embodiment of the present invention provides an offshore full DC wind farm based on the starting resistance of the machine terminal, which is applied to the occasions that need to start the wind farm safely and reliably. The embodiment of the present invention takes the offshore wind farm as an example for illustration, as follows figure 2 As shown, it includes: a control system 1 , a DC step-up station 2 , a DC bus 3 , at least one set of DC wind turbines 4 , at least one set of converging branches 5 and at least one DC bus isolating switch 6 .

[0036] Such as figure 2 As shown, each group of collection branches 5 in the embodiment of the present invention is connected with a preset number of field-side power generation and conversion devices, and each group of collection branches 5 is connected to the DC bus 3 through a DC bus isolation switch 6, and the DC boost Station 2 is connected to DC bus 3;

[0037] Each group of DC wind turbines 4 includes a starting ...

Embodiment 2

[0051] An embodiment of the present invention provides a method for starting an offshore full DC wind farm based on the machine-side starting resistance, based on the offshore full-DC wind farm based on the machine-side starting resistance in Embodiment 1, such as Image 6 As shown, the startup methods include:

[0052] Step S11: the flexible DC control system controls the first DC boost converter to start by controlling the operating states of the DC boost station and the DC bus isolation switch.

[0053] Step S12: The station control system of the wind farm controls the input of each wind turbine by controlling the operating state of the DC wind turbine.

[0054] Step S13: The flexible DC control system controls the first DC boost converter to charge the collection branch and the wind turbine, and establishes the field-side port voltage of the first DC boost converter.

[0055] Step S14: The station control system of the wind farm controls the running state of the starting ...

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Abstract

The invention discloses an offshore full-direct-current wind power plant based on a machine end starting resistor and a starting method of the offshore full-direct-current wind power plant. The full-direct-current wind power plant is characterized in that: each group of collection branch circuit is connected with a preset number of field side power generation and conversion devices, the branch is connected with a direct-current bus through a direct-current bus isolation switch, and a direct-current booster station is connected with the direct-current bus; each direct-current wind turbine generator comprises a starting device; and the control system controls the running states of the direct-current booster station, the direct-current wind turbine generator, the starting device and the direct-current bus isolating switch. The starting devices are arranged in the direct-current wind turbine generators, before the direct-current wind turbine generators are controlled to charge the collection branch circuits, whether the port voltage and the port current of the starting device meet constraint conditions or not is judged, if so, the direct-current wind turbine generators can be controlled to charge the collection branch circuits, and 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 wind power generation and its full direct current collection networking, in particular to an offshore full direct current wind farm based on a machine terminal starting resistance and a starting method thereof. 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. In recent years, domestic and foreign scholars have proposed a new concept of DC integration in offshore wind farms, that is, using high-gain machine-side DC-DC to replace the grid-side converter and power frequency transformer in traditional AC wind turbines, and the machine-side converter The output DC voltage U link Raised to DC sink voltage U cl And realize the collection of electric energy, and finally through the DC booster station installed on the offshore platform, the voltage is further raised t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J1/12
CPCH02J1/12Y02E60/60
Inventor 李修一阳岳希孙同越杨杰陈靖思
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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