A Load Shedding Control Method for Primary Frequency Regulation of Wind Power Generating Sets

A technology for a wind turbine generator set and a control method, which is applied to the control of wind turbines, wind turbines, wind energy power generation, etc., can solve problems such as increasing the mechanical wear of the device, and achieves reduction of wear and tear, simple and reliable control methods, and reduction of frequent adjustment of blades. the effect of the problem

CN109611270BActive Publication Date: 2020-07-03DONGFANG ELECTRIC AUTOMATIC CONTROL ENG CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2020-07-03

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Abstract

The invention belongs to the technical field of control of a wind force generation main control system, and discloses a deloading control method of primary frequency modulation of a wind force generator set. According to the condition that a variable pitch wind turbine generator set has different wind energy catching efficiency at different propeller pitch angles and different blade tip speed ratios, based on integrating advantages and disadvantages of a superspeed method and a propeller pitch angle control method during power standby application and control, a propeller pitch angle control strategy is used to realize deloading control of primary frequency modulation of a wind force generator set. The control method comprises a standby application control strategy for three kinds of powerat low wind speed, middle wind speed and high wind speed. The control method is simple and reliable. Alleviation of the mechanical wear and tear of the device caused by frequent regulation of propeller blades of a wind force generator set during primary frequency modulation deloading operation, is facilitated.
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Description

technical field

[0001] The invention belongs to the control technical field of a main control system of wind power generation, and in particular relates to a load reduction control method for primary frequency modulation of a wind power generating set. Background technique

[0002] The imbalance between power supply and power consumption in the power system will affect the stable operation of the power system, resulting in system frequency fluctuations and power quality degradation. Due to the intermittent and uncertain characteristics of wind power generation, the integration of large-scale wind power generation will lead to an increase in the demand for reserve capacity of conventional units in the power system. Direct-drive wind turbines usually operate in MPPT mode, and cannot provide continuous active power support to the grid like conventional wind turbines when the grid frequency drops. In order to reduce the impact of wind power access on frequency quality and grid ...

Examples

Embodiment Construction

[0035] According to the variable-pitch wind turbines having different wind energy capture efficiencies under different pitch angles and blade tip speed ratios, the present invention utilizes a pitch angle control strategy to realize power backup for primary frequency modulation of the wind turbines. The control method includes three power backup control strategies of low wind speed, medium wind speed and high wind speed. The technical solution for realizing the purpose of the present invention is further described below through a specific embodiment. It should be noted that the technical solution claimed in the present invention includes but is not limited to the following embodiments.

[0036] A load shedding control method for primary frequency regulation of a wind power generating set, specifically comprising the following steps:

[0037] a. Obtain the load reduction ratio of wind turbines η%, and the maximum wind energy capture coefficient C p-max and wind turbine C P -λ...