Emergency power control method and system of offshore wind power flexile and direct access system

An offshore wind power and power control technology, which is applied in wind power generation, electrical components, circuit devices, etc., can solve the problem of inability to accurately, quickly and effectively control the power injected into the main network, and achieve reliable removal, avoid excessive lift, Provides the effect of power support

Pending Publication Date: 2019-10-18
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the above-mentioned existing technologies, the offshore wind power system connected to the main grid through the flexible direct current transmission system cannot accurately, quickly and effectively control the power injected into the main grid in the event of a major fault in the main grid or other dispatching requirements. The present invention proposes an emergency power control method and system in which offshore wind power is directly connected to the system via a flexible cable, and combined with the power dissipation capability of the braking resistor at the DC outlet of the onshore converter station, the active power injected into the main grid can be realized. The power can be adjusted accurately, quickly and effectively, which improves the flexibility of wind power regulation

Method used

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  • Emergency power control method and system of offshore wind power flexile and direct access system
  • Emergency power control method and system of offshore wind power flexile and direct access system
  • Emergency power control method and system of offshore wind power flexile and direct access system

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Embodiment 1

[0062] The schematic flow chart of an emergency power control method for an offshore wind power directly fed into the system through a flexible system provided by the present invention is as follows figure 1 shown, including:

[0063] Step 1: Based on the pre-established communication system, receive the control signal sent by the system dispatching center;

[0064] Step 2: According to the type of the control signal, start the corresponding emergency power control method;

[0065] Among them, the emergency power control method can be applied to the land brake resistor and / or the AC system of the offshore wind farm; the land brake resistor is set at the DC outlet of the land converter station.

[0066] Specifically, the present invention provides an emergency power control method for offshore wind power directly connected to the system. According to the actual system control requirements, three emergency power control functions and their implementation methods are designed, a...

Embodiment 2

[0083] Based on the same inventive concept, the present invention also provides an emergency power control system for the offshore wind power direct access system. Since the principle of these devices to solve technical problems is similar to the emergency power control method for the offshore wind power direct access system, the overlap No longer.

[0084] The basic structure of the system is as Figure 9 As shown, including: signal module and control module;

[0085] Among them, the signal module is used to receive the control signal sent by the system dispatching center based on the pre-established communication system;

[0086]A control module, configured to start a corresponding emergency power control method according to the type of the control signal;

[0087] Among them, the emergency power control method can be applied to the land brake resistor and / or the AC system of the offshore wind farm; the land brake resistor is set at the DC outlet of the land converter stat...

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Abstract

The invention provides an emergency power control method and system of an offshore wind power flexile and direct access system. The emergency power control method comprises the steps of receiving a control signal sent from a system dispatching center by a communication system built in advance; starting a corresponding emergency power control method according to the type of the control signal, wherein the emergency power control method can act on a land braking resistor and / or offshore wind power field AC system; and arranging the land braking resistor at a DC outlet of a land converter station. The characteristic that a flexible DC active power can be rapidly and independently adjusted is utilized, an emergency power control method is designed, the power injected to a main grid system canbe effectively adjusted, and the offshore wind power control flexibility is improved.

Description

technical field [0001] The invention belongs to the technical field of control of flexible direct current transmission systems, and in particular relates to an emergency power control method and system for offshore wind power directly connected to the system through a flexible system. Background technique [0002] Compared with onshore wind power, offshore wind power resources are more abundant, less affected by the geographical and natural environment, and wind energy sustainability is better. Therefore, offshore wind power has become one of the main trends in the development of green and sustainable energy, and has now entered the engineering stage. [0003] In the prior art, the main method is to transmit the electric energy generated by offshore wind power to the main grid through the flexible direct current transmission (HVDC) system, but wind power generation has the characteristics of volatility, intermittent and randomness, which puts forward high requirements on the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/48
CPCH02J3/386H02J3/48Y02E10/76
Inventor 杜镇宇杨杰许韦华阳岳希涂莉巴维孙同越程婷婷潘武略张静
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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