CN114439690A

CN114439690A - Control method of wind generating set

Info

Publication number: CN114439690A
Application number: CN202210086653.0A
Authority: CN
Inventors: 周治伊; 郝如海; 杨勇; 何欣; 张海龙; 冯文韬; 孙贺斌; 刘文飞; 陈仕彬; 牛浩明; 张旭军
Original assignee: STATE GRID GASU ELECTRIC POWER RESEARCH INSTITUTE
Current assignee: STATE GRID GASU ELECTRIC POWER RESEARCH INSTITUTE
Priority date: 2022-01-25
Filing date: 2022-01-25
Publication date: 2022-05-06

Abstract

The invention provides a control method of a wind generating set, which specifically comprises the following steps: step 1: recording the rotating speed of the blades under the conditions of the highest wind speed and the lowest wind speed every day, the temperatures of a hub, a generator and a converter under different speeds and the power flux of the generator and a power grid; step 2: setting a temperature fluctuation warning value and a fluctuation danger value, and setting a flux safety fluctuation value of a generator and a power grid; and step 3: detecting a fluctuating hazard value; and 4, step 4: detecting a fluctuating alert value; and 5: adjusting the rotating speed of the blades; step 6: detecting a safety fluctuation value; and 7: normal operation is carried out; and step 8: the wind driven generator can be adjusted when the wind driven generator set works and small-amplitude abnormal fluctuation occurs, so that the service life of the wind driven generator is prolonged, the wind driven generator can be stopped in time when major faults occur, and larger damage is avoided.

Description

Control method of wind generating set

Technical Field

The invention relates to the technical field of wind power generation, in particular to a control method of a wind generating set.

Background

The wind power generation power supply comprises a wind generating set, a tower frame for supporting the generating set, a storage battery charging controller, an inverter, an unloader, a grid-connected controller, a storage battery pack and the like; the wind generating set comprises a wind wheel and a generator; the wind wheel comprises blades, a hub, a reinforcing member and the like; it has the functions of wind driven rotation of the blades to generate electricity, rotation of the generator head, etc. Selecting wind speed: the low wind speed wind power generator can effectively improve the wind energy utilization of the wind power generator in a low wind speed area, and low wind speed products are recommended to be selected in areas with annual average wind speed less than 3.5m/s and no typhoon.

The wind generating set comprises a constant-speed constant-frequency wind generating set and a variable-speed constant-frequency wind generating set, and the variable-speed constant-frequency wind generating set can obtain the maximum wind energy utilization string in a low wind speed area due to the fact that the rotating speed of the variable-speed constant-frequency wind generating set can change along with the change of wind speed.

In view of the above-mentioned related technologies, the inventor believes that, because the frequency of the power grid is basically unchanged and the rotating speed of the wind turbine generator set changes within a certain range, it is required to add a fully-controlled converter between the generator and the power grid to realize the decoupling control between the frequency of the power grid and the rotating speed of the generator, so the control complexity of the wind turbine generator set is correspondingly increased, and the large inertia in the structure and control of the wind turbine generator set often causes a large time delay in emergency response, and if the wind turbine generator set fails to be processed in time, a large loss is caused, so a control method capable of early warning and adjusting in advance and shutting down the wind turbine generator set in time is required.

Disclosure of Invention

Aiming at the technical problems, the invention provides a control method of a wind generating set, which aims to solve the problems in the prior art.

In order to achieve the purpose, the invention adopts the technical scheme that:

the invention provides a control method of a wind generating set, which specifically comprises the following steps:

step 1: the rotation speed of the blades under the conditions of the highest wind speed and the lowest wind speed every day, the temperatures of the hub, the generator and the converter under different speeds, the output power of the generator and the electric power receiving quantity of a power grid at the same time are recorded through a meteorological forecast and wind speed sensor.

Step 2: and setting temperature fluctuation warning values and fluctuation danger values of the hub, the generator and the converter at different wind speeds during working, and setting safe fluctuation values of the output power of the generator and the power grid power receiving quantity at different wind speeds.

And step 3: and (4) detecting whether the temperatures of the hub, the generator and the converter are at a fluctuation dangerous value or not, if so, entering a step 8, and if not, entering a step 4.

And 4, step 4: and detecting whether the temperatures of the hub, the generator and the converter are at a fluctuation warning value, if so, entering a step 5, and if not, entering a step 6.

And 5: and (4) regulating the rotating speed of the blades by the speed regulating mechanism and the speed limiting mechanism, and entering the step (4) again after the regulation is finished.

Step 6: and (4) detecting whether the output power and the electric power receiving quantity of the generator are in a safe fluctuation value, if so, entering a step 7, and if not, entering a step 8.

And 7: and (5) normally running.

And 8: and stopping the machine for maintenance, and overhauling the machine set.

The technical scheme has the following advantages or beneficial effects:

1. the invention can adjust the wind driven generator when the wind driven generator set works and small-amplitude abnormal fluctuation occurs, prolongs the service life of the wind driven generator, and can stop the wind driven generator in time when major failure occurs to avoid larger damage.

Drawings

The invention and its features, aspects and advantages will become more apparent from reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference symbols in the various drawings indicate like elements. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention.

FIG. 1 is a control flow chart provided in embodiment 1 of the present invention;

FIG. 2 is a flow chart of the operation of a wind turbine generator system provided in embodiment 1 of the present invention;

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application.

It will be understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

For example, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like, as the terms refer to orientations or positional relationships illustrated in the accompanying drawings, are intended to facilitate description of the invention and to simplify description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the invention.

The appearances of the terms first, second, and third, if any, are used for descriptive purposes only and are not intended to be limiting or imply relative importance.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The technical solutions in the embodiments of the present invention are described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the invention without making creative efforts, belong to the protection scope of the invention.

Example 1:

a control method of a wind generating set is characterized in that: the method specifically comprises the following steps:

And 7: and (5) normally running.

The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or any other related technical fields, are included in the scope of the present invention.

Claims

1. A control method of a wind generating set is characterized in that: the method specifically comprises the following steps:

step 1: recording the rotating speed of the blades under the conditions of daily highest wind speed and lowest wind speed, the temperatures of a hub, a generator and a converter under different speeds, the output power of the generator and the electric power receiving quantity of a power grid at the same time section through a meteorological forecast and a wind speed sensor;

step 2: setting temperature fluctuation warning values and fluctuation danger values of the hub, the generator and the converter at different wind speeds during working, and setting safe fluctuation values of the output power of the generator and the power grid power receiving quantity at different wind speeds;

and step 3: detecting whether the temperatures of the hub, the generator and the converter are at a fluctuation danger value or not, if so, entering a step 8, and if not, entering a step 4;

and 4, step 4: detecting whether the temperatures of the hub, the generator and the converter are at a fluctuation warning value, if so, entering a step 5, and if not, entering a step 6;

and 5: regulating the rotating speed of the blades through the speed regulating mechanism and the speed limiting mechanism, and entering the step 4 again after the regulation is finished;

step 6: detecting whether the output power and the electric power receiving quantity of the generator are in a safe fluctuation value, if so, entering a step 7, and if not, entering a step 8;

and 7: normal operation is carried out;