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A high-voltage ride-through control device for wind power generators

A technology for wind turbines and control devices, which is applied in wind power generation, parallel feeding arrangement of a single network, etc., can solve the problems of power grid power shock, damage to the grid, system paralysis, etc.

Active Publication Date: 2018-09-18
CHENGDU FORWARD TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] When the voltage of the power grid suddenly rises due to faults, if it is not controlled, it may cause damage to the converter and wind turbines. The system is paralyzed, endangering other equipment in the power grid and even causing more serious losses

Method used

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  • A high-voltage ride-through control device for wind power generators
  • A high-voltage ride-through control device for wind power generators
  • A high-voltage ride-through control device for wind power generators

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Embodiment Construction

[0035] In order to describe the technical content, structural features, goals and effects of the present invention in detail, the following examples are given and described in detail with accompanying drawings.

[0036] see figure 1 , Figure 2A and Figure 2B , a high-voltage ride-through control method for a wind power generating set according to one of the present inventions, comprising:

[0037] Step S1: The pitch controller judges whether the voltage signal of the main power supply at the input side is a high voltage ride-through signal or a low voltage ride through signal. If it is a low voltage ride through signal, the pitch controller activates the low voltage ride through control mode and enters the low voltage ride through control model;

[0038] Step S2: If it is a high-voltage ride-through signal, the pitch controller activates the high-voltage ride-through mode and enters the high-voltage ride-through control mode, and the pitch controller further determines th...

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Abstract

The invention relates to a wind power generating set high voltage ride-through control method and device. A voltage monitor is adopted as a voltage withstanding device; under a situation that a pitch system is disconnected from a power grid, a voltage withstanding device such as the voltage monitor is utilized to withstand transient high voltage for at least 2 seconds, so that high voltage ride-through can be realized under the condition that a wind power generating set is connected with the power grid; and therefore, huge impact on the power grid and accidents endangering the safety of the wind power generating set can be avoided; and the wind power generating set high voltage ride-through control device can be matched with the corresponding wind power generating set high voltage ride-through control method, so that the pitch system can be automatically disconnected from the power grid so as to work according to the condition of the power grid.

Description

technical field [0001] The invention relates to the field of wind power generation control, in particular to a high-voltage ride-through control method and device thereof applied to wind power generating sets. Background technique [0002] At present, with the development of large-scale offshore wind power and onshore wind power, large-scale wind power is connected to the grid. Because of the volatility of the wind power system, it brings many problems to the power system, such as: voltage fluctuation, power imbalance, harmonic Phenomena such as large wave content have buried hidden dangers for the stable operation of the power system. [0003] Based on safe and stable operation and control and protection requirements, many countries have formulated new grid-connected technical regulations. In recent years, high-voltage ride-through has been paid more and more attention. Foreign countries such as the United States, Canada, Australia, Ireland, and Denmark have formulated deta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38
CPCY02E10/76
Inventor 费许华赵伟冯永刚刘进付小林
Owner CHENGDU FORWARD TECH
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