Unlock instant, AI-driven research and patent intelligence for your innovation.

Fan transformation method for realizing low voltage ride through of doubly-fed wind turbine

A low-voltage ride-through and wind turbine technology, applied in wind power generation, battery circuit devices, collectors, etc., can solve problems such as weakening the ability of the DFIG system to resist grid voltage drops

Active Publication Date: 2011-02-02
GUODIAN UNITED POWER TECH
View PDF1 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the DFIG wind power generation system uses a small-capacity converter, it weakens the ability of the DFIG system to withstand grid voltage drops

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] The present invention will be described in detail below in conjunction with the examples.

[0012] The fan transformation method for realizing the low-voltage ride-through of the doubly-fed wind turbine of the present invention has the following steps:

[0013] 1) According to the UPS (uninterruptible) power supply conditions of the fan in the prior art, an online UPS battery cabinet is installed on the main control system of the fan, the pitch control system and its control circuit, and the frequency converter control system respectively. To ensure that the control work of each control system can operate normally when the voltage drops; it includes the following steps:

[0014] ① In the main control system, pitch control system and frequency converter control system, a switching module is also installed to control the on / off work of each UPS battery;

[0015] ② When a voltage drop occurs, the low voltage ride through start signal is sent to each switching module, and ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a fan transformation method for realizing low voltage ride through of a doubly-fed wind turbine, which comprises the following steps of: (1) according to the uninterrupted power supply configuration condition of the fan, respectively arranging an online uninterrupted battery cupboard on a master control system, a pitch control system, a control loop of the pitch control system and a frequency converter control system of the fan; and (2) modifying control modes of the master control system and the pitch control system matched with the master control system and a control mode of the frequency converter control system matched with the master control system. Online Uninterrupted Power Supply (UPS) battery cupboards are respectively arranged on the master control system, the pitch control system, the control loop of the pitch control system and the frequency converter control system of the fan, so the normal running of the control function of each control system can be ensured when voltage sags. The fan transformation method can be applied in the wind power industry.

Description

technical field [0001] The invention relates to a wind turbine transformation method of a wind turbine, in particular to a wind turbine transformation method for realizing low-voltage ride-through of a doubly-fed wind turbine. Background technique [0002] In recent years, China's wind power industry has entered a stage of ultra-high-speed development, and its installed capacity has doubled year after year. However, with the large-scale development of wind power, the technical requirements for connecting large-scale wind farms to the grid are also increasing. For wind turbines, one of the most important technical requirements is the low-voltage ride-through capability of wind turbines. Low voltage ride through means that when the grid failure or disturbance causes the voltage drop at the grid-connected point of the wind farm, within a certain range of voltage drop, the wind turbine can run uninterruptedly connected to the grid. This makes the application of variable-speed ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J7/00
CPCY02E10/763Y02E10/76
Inventor 潘磊李佳奇孙黎翔袁凌张大同秦明
Owner GUODIAN UNITED POWER TECH