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Variable speed wind turbine generator frequency control method based on dynamic standby power

A variable-speed wind turbine and dynamic power technology, applied in wind power generation, single-grid parallel feeding arrangement, etc., to achieve the effects of ensuring frequency safety, improving grid-connected characteristics, and reducing frequency accidents

Active Publication Date: 2015-02-04
STATE GRID CORP OF CHINA +3
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are certain disadvantages in the variable-speed wind turbines participating in system frequency modulation simply through additional frequency control links

Method used

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  • Variable speed wind turbine generator frequency control method based on dynamic standby power
  • Variable speed wind turbine generator frequency control method based on dynamic standby power
  • Variable speed wind turbine generator frequency control method based on dynamic standby power

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Embodiment Construction

[0041] The specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0042] Such as figure 1 as shown, figure 1 It is a flow chart of variable speed wind turbine frequency control in the whole wind speed zone; the variable speed wind turbine frequency control method based on dynamic power reserve comprises the following steps: 1, determine the variable speed wind turbine frequency modulation operation strategy;

[0043] II. Judging the system frequency;

[0044] III. Determine whether the fan speed exceeds the limit;

[0045] IV. Activate the active frequency control module; modify the wind turbine active power set value;

[0046] V. Control the frequency of the wind turbine.

[0047] Specifically, the variable-speed wind turbine frequency control method based on dynamic power reserve includes:

[0048] Step 1: Determine the frequency regulation operation strategy of the variable speed wind tur...

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Abstract

The invention provides a variable speed wind turbine generator frequency control method based on dynamic standby power. The method comprises the following steps that I, a frequency modulation operation strategy of a variable speed wind turbine generator is determined according to operation conditions of the variable speed wind turbine generator; II, whether the variable speed wind turbine generator participates in system frequency modulation or not is judged; III, whether the rotating speed of the wind turbine generator is out of limit or not is judged; IV, an active frequency control module is activated, and an active power set value of the wind turbine generator is modified; V, control over the system frequency is achieved. The variable speed wind turbine generator frequency control method based on dynamic standby power can achieve frequency modulation capability of the wind turbine generator in a full wind speed region, when participating in the system frequency modulation to provide active support, the wind turbine generator is not affected by the operation conditions, and therefore electric system frequency stability is improved.

Description

technical field [0001] The present invention relates to a method in the technical field of grid-connected wind turbines in new energy power generation technology, in particular to a variable-speed wind turbine frequency control method based on dynamic power backup. Background technique [0002] The active power balance of the power system is the premise of the frequency stability of the power system. When the system encounters disturbances, such as short-circuit faults, tripping, disconnection of tie lines, system disconnection, etc., the total generating power and the total load power of the system often exist. Unbalanced; if the total generating power exceeds the total load power (including network loss), the system frequency will increase; otherwise, if the total generating power is less than the total load power, the system frequency will decrease. According to the different frequency fluctuations and the operating conditions of the system at that time, corresponding mea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38
CPCY02E10/76
Inventor 迟永宁王伟胜田新首李琰汤海雁张占奎王真孙蔚苏媛媛魏林君
Owner STATE GRID CORP OF CHINA
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