阅读说明：本技术 一种风力发电输出过载保护装置及使用方法 (Wind power generation output overload protection device and use method ) 是由 马昱 于 2020-11-03 设计创作，主要内容包括：本发明公开的属于风力发电技术领域,具体为一种风力发电输出过载保护装置及使用方法,包括保护装置、输入连接线、输出连接线、分流连接线和调节器,所述保护装置包括壳体、分流器、输出稳压器、输出变压器、分流稳压器和分流变压器,所述分流器、输出稳压器、输出变压器、分流稳压器和分流变压器均安装在壳体内,所述输入连接线输出连接分流器,所述分流稳压器和输出稳压器分别输出连接分流变压器和输出变压器,所述输出变压器和分流变压器分别通过分流连接线和输出连接线输出连接调节器,本申请文件中,通过采用电压分流的方式,并通过定时器时分流的电压再次的输出到输出线路上,减少电力损耗,同时防止了线路输出电压过载的情况发生。(The invention discloses a wind power generation output overload protection device and a using method, belonging to the technical field of wind power generation, comprising a protection device, an input connecting line, an output connecting line, a shunt connecting line and a regulator, wherein the protection device comprises a shell, a shunt, an output voltage stabilizer, an output transformer, a shunt voltage stabilizer and a shunt transformer, the shunt, the output voltage stabilizer, the output transformer, the shunt voltage stabilizer and the shunt transformer are all arranged in the shell, the output of the input connecting line is connected with the shunt, the shunt voltage stabilizer and the output voltage stabilizer are respectively connected with the shunt transformer and the output transformer in an output way, the output transformer and the shunt transformer are respectively connected with the regulator in an output way through the shunt connecting line and the output connecting line, in the application document, the voltage shunt way is adopted, and the voltage shunted when passing through a timer is output to an, the power loss is reduced, and the condition that the line output voltage is overloaded is prevented.)

1. The utility model provides a wind power generation output overload protection device which characterized in that: including protection device (100), input connecting wire (200), output connecting wire (170), reposition of redundant personnel connecting wire (160) and regulator (180), protection device (100) are including casing, shunt (110), output voltage regulator (120), output transformer (130), reposition of redundant personnel stabiliser (140) and shunt transformer (150) are all installed in the casing, input connecting wire (200) output connection shunt (110), shunt (110) output connection reposition of redundant personnel stabiliser (140) and output voltage regulator (120), reposition of redundant personnel stabiliser (140) and output voltage regulator (120) output connection shunt transformer (150) and output transformer (130) respectively, output transformer (130) and reposition of redundant personnel transformer (150) are respectively through reposition of redundant personnel connecting wire (160) and output connecting wire (170) output connection A connection adjuster (180);

shunt (110) include controller, reposition of redundant personnel switch, undervoltage protection system, open-phase protection system and phase sequence protection system and constitute, reposition of redundant personnel switch's reposition of redundant personnel mode is as follows:

when the shunt switch is turned on, two output ends of the shunt switch are respectively connected with the output voltage stabilizer (120) and the shunt voltage stabilizer (140) in an output connection mode;

when the shunt switch is closed, a line connected with the output voltage stabilizer (120) is in a connection state, a line connected with the shunt voltage stabilizer (140) is in a closed state, and the voltage output to the output voltage stabilizer (120) is full-load voltage;

regulator (180) comprise controller, circuit breaker, solid state relay, expand a class circuit and 555 timer, output connecting wire (170) and reposition of redundant personnel connecting wire (160) all are connected, two with solid state relay output connection circuit breaker, the controller is connected with the 555 timer, 555 timer output connection expands a class circuit, expand a class circuit output connection circuit breaker.

2. A wind power generation output overload protection apparatus as claimed in claim 1, wherein: the on-off state of a shunt switch on the shunt (110) is determined by input voltage, and the specific steps are as follows:

when the input voltage is greater than the full load voltage of the output terminal, the shunt switch is turned on, and when the input voltage is less than or equal to the full load voltage of the output terminal, the shunt switch is turned off.

3. A wind power generation output overload protection apparatus as claimed in claim 1, wherein: the regulator (180) operates as follows:

the solid state relay in regulator (180) is connected with output connecting wire (170) and reposition of redundant personnel connecting wire (160), exports the circuit breaker, and two interfaces on the circuit breaker are input interface, and an interface is output interface, and two input interface of circuit breaker are controlled by 555 timer and controller, and the switch of two input interface of 555 timer control specifically is as follows:

when the control output connecting line (170) connecting switch is turned on, the power only passes through the output connecting line (170), and when the control shunt connecting line (160) connecting switch is turned on, the power only passes through the shunt connecting line (160).

4. A wind power generation output overload protection apparatus as claimed in claim 1, wherein: and a voltage division circuit is arranged on the shunt connecting wire (160).

5. Use of a wind power generation output overload protection apparatus according to any one of claims 1 to 4, characterised in that: the use method of the protection device (100) is as follows:

the method comprises the following steps: the output electricity enters the protection device (100) through the input connecting line (200);

step two: the shunt (110) obtains the maximum bearing voltage of the output end according to a set program, then the maximum bearing voltage is output to the output voltage stabilizer (120) through the controller, and the voltage exceeding the bearing range is output from the shunt voltage stabilizer (140) after being shunted;

step three: the output voltage is respectively regulated through an output transformer (130) and a shunt transformer (150) to obtain redundant voltage bearing space in a voltage bearing range;

step four: the output voltage enters the regulator (180), and then a circuit breaker in the regulator (180) is controlled by a 555 timer and a controller, so that the switch is performed for multiple times per second;

step five: according to the switch state, the voltages of the output connecting line (170) and the shunt connecting line (160) are respectively output after passing through the regulator (180), and the voltage division circuit is started to reduce the voltage on the shunt connecting line (160) under the condition of overload on the shunt connecting line (160) so as to enable the voltage to be lower than the full-load voltage.

Technical Field

The invention relates to the technical field of wind power generation, in particular to a wind power generation output overload protection device and a using method thereof.

Background

The principle of wind power generation is that wind power drives windmill blades to rotate, and then the rotating speed is increased through a speed increaser, so that a generator is promoted to generate electricity. According to the windmill technique, a breeze speed (of the order of three meters per second) can be used to generate electricity. Wind power generation is forming a hot tide in the world because it does not require the use of fuel and does not produce radiation or air pollution.

When the electric wind generating set generates electricity, the constant output electric frequency is ensured. The wind power generation system is very necessary for wind power grid-connected power generation and wind-solar hybrid power generation. To ensure the constant frequency of wind power, one way is to ensure the constant rotating speed of the generator, i.e. the constant speed and constant frequency operation way, because the generator is driven by the wind turbine through the transmission device to operate, the rotating speed of the wind turbine needs to be undoubtedly constant, and the way can influence the conversion efficiency of wind energy; the other mode is that the rotating speed of the generator changes along with the wind speed, and the constant frequency of the output electric energy is ensured by other means, namely, the variable-speed constant-frequency operation is realized. The wind energy utilization coefficient of the wind turbine is related to the tip speed ratio (the ratio of the linear speed of the impeller tip to the wind speed), and a certain determined tip speed ratio exists, so that the Cp reaches the maximum value. Therefore, under the variable speed constant frequency operation mode, the rotating speed of the wind turbine and the generator can be changed in a large range without influencing the frequency of the output electric energy. Therefore, the wind generating set always uses a variable speed constant frequency method to ensure constant output frequency.

The method makes the output frequency of the wind power generation constant, but cannot ensure that the output voltage is always within the bearable range of the wind power generator set, so that the output frequency is output in a stable state when the wind power is too large, but the output voltage is increased, the output voltage is easy to exceed the voltage bearing range of the generator set, the overload condition is caused, and the extremely damaged condition is caused after too long time, which is not beneficial to use.

Disclosure of Invention

This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.

The present invention has been made in view of the above and/or other problems occurring in the conventional wind turbine generator system.

Therefore, the invention aims to provide a wind power generation output overload protection device and a using method thereof, which can effectively prevent the motor equipment from being damaged due to overlarge output voltage and prolong the service life of a generator set.

To solve the above technical problem, according to an aspect of the present invention, the present invention provides the following technical solutions:

a wind power generation output overload protection device comprises a protection device, an input connecting line, an output connecting line, a shunt connecting line and a regulator, wherein the protection device comprises a shell, a shunt, an output voltage stabilizer, an output transformer, a shunt voltage stabilizer and a shunt transformer;

the shunt comprises a controller, a shunt switch, an undervoltage protection system, a phase-failure protection system and a phase sequence protection system, wherein the shunt mode of the shunt switch is as follows:

when the shunt switch is turned on, two output ends of the shunt switch are respectively connected with the output voltage stabilizer and the shunt voltage stabilizer in an output connection mode;

when the shunt switch is closed, a circuit connected with the output voltage stabilizer is in a connection state and a circuit connected with the shunt voltage stabilizer is in a closed state in two output ends of the shunt switch, and the voltage output to the output voltage stabilizer is full-load voltage;

the regulator comprises controller, circuit breaker, solid state relay, the circuit that expands and 555 timer, output connecting wire and reposition of redundant personnel connecting wire all are connected with solid state relay, two the circuit breaker is connected in the output of solid state relay, the controller is connected with the 555 timer, 555 timer output connection expands the circuit, expand the circuit output connection circuit breaker.

As a preferable aspect of the wind power generation output overload protection apparatus according to the present invention, wherein: the on-off state of the shunt switch on the shunt is determined by input voltage, and the on-off state is specifically as follows:

when the input voltage is greater than the full load voltage of the output terminal, the shunt switch is turned on, and when the input voltage is less than or equal to the full load voltage of the output terminal, the shunt switch is turned off.

As a preferable aspect of the wind power generation output overload protection apparatus according to the present invention, wherein: the regulator works as follows:

solid state relay in the regulator is connected with output connecting wire and reposition of redundant personnel connecting wire, exports the circuit breaker, and two interfaces on the circuit breaker are input interface, and an interface is output interface, and two input interface of circuit breaker are controlled by 555 timer and controller, and the switch of two input interface of 555 timer control specifically as follows:

when the control output connecting line connecting switch is turned on, the electric power only passes through the output connecting line, and when the control shunt connecting line connecting switch is turned on, the electric power only passes through the shunt connecting line.

As a preferable aspect of the wind power generation output overload protection apparatus according to the present invention, wherein: and the shunt connecting line is provided with a voltage division circuit.

As a preferable aspect of the method for using the wind power generation output overload protection device according to the present invention, wherein: the use method of the protection device is as follows:

the method comprises the following steps: the output power enters the protection device through the input connecting line;

step two: the shunt acquires the maximum bearing voltage of the output end according to a set program, then outputs the maximum bearing voltage to the output voltage stabilizer through the controller, and outputs the maximum bearing voltage from the shunt voltage stabilizer after voltage exceeding the bearing range is shunted;

step three: the output voltage is respectively regulated through an output transformer and a shunt transformer to obtain redundant voltage bearing space in a voltage bearing range;

step four: the output voltage enters a regulator, and then a circuit breaker in the regulator is controlled by a 555 timer and a controller, so that the circuit breaker is switched on and off for many times per second;

step five: according to the switch, the voltages of the output connecting line and the shunt connecting line are respectively output after passing through the regulator, and the voltage division circuit can be started to reduce the voltage on the shunt connecting line under the condition of overload on the shunt connecting line, so that the voltage is lower than the full-load voltage.

Compared with the prior art: the output frequency that prior art only can make wind power generation is invariable, but can not guarantee that its output voltage is in wind generating set's bearable within range all the time, this causes when wind-force is too big, the frequency of output is stable state output, but its output voltage increases, cause the voltage that surpasss generating set to bear the scope easily, cause the condition of transshipping to take place, the time overlength will be taking place causing the extremely condition of damaging, be unfavorable for the use, in this application document, through the mode that adopts the voltage reposition of redundant personnel, and output to the output line of voltage reposition of redundant personnel once more when passing through the timer, reduce power loss, the condition that line output voltage overloads has been prevented simultaneously from taking place.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail with reference to the accompanying drawings and detailed embodiments, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise. Wherein:

FIG. 1 is a schematic structural diagram of a wind power generation output overload protection apparatus and a method of using the same according to the present invention;

FIG. 2 is a schematic diagram of a voltage divider circuit of a wind power generation output overload protection apparatus and a method for using the same according to the present invention;

fig. 3 is a schematic diagram of a 555 timer circuit structure of a wind power generation output overload protection device and a using method thereof.

In the figure: 100 protective devices, 110 shunt, 120 output voltage stabilizer, 130 output transformer, 140 shunt voltage stabilizer, 150 shunt transformer, 160 shunt connecting line, 170 output connecting line, 180 regulator, 200 input connecting line.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described herein, and it will be apparent to those of ordinary skill in the art that the present invention may be practiced without departing from the spirit and scope of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Next, the present invention will be described in detail with reference to the drawings, wherein for convenience of illustration, the cross-sectional view of the device structure is not enlarged partially according to the general scale, and the drawings are only examples, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention provides a wind power generation output overload protection device, please refer to fig. 1-3, comprising a protection device 100, an input connection line 200, an output connection line 170, a shunt connection line 160 and a regulator 180, the protection device 100 includes a case, a shunt 110, an output regulator 120, an output transformer 130, a shunt regulator 140 and a shunt transformer 150, the shunt 110, the output regulator 120, the output transformer 130, the shunt regulator 140 and the shunt transformer 150 are all installed in the housing, the output of the input connection line 200 is connected with a shunt 110, the output of the shunt 110 is connected with a shunt voltage regulator 140 and an output voltage regulator 120, the shunt regulator 140 and the output regulator 120 are respectively connected with the shunt transformer 150 and the output transformer 130, the output transformer 130 and the shunt transformer 150 are respectively connected with the regulator 180 through a shunt connection line 160 and an output connection line 170;

the shunt 110 comprises a controller, a shunt switch, an undervoltage protection system, a phase-failure protection system and a phase sequence protection system, wherein the shunt mode of the shunt switch is as follows:

when the shunt switch is turned on, two output ends of the shunt switch are respectively connected with the output voltage stabilizer 120 and the shunt voltage stabilizer 140 in an output mode;

when the shunt switch is turned off, of the two output ends of the shunt switch, the line connected to the output regulator 120 is in a connected state, the line connected to the shunt regulator 140 is in a turned-off state, and the voltage output to the output regulator 120 is a full-load voltage;

regulator 180 comprises controller, circuit breaker, solid state relay, the circuit that expands and flows and 555 timer, output connecting wire 170 and reposition of redundant personnel connecting wire 160 all are connected, two with solid state relay the circuit breaker is connected in the output of solid state relay, the controller is connected with the 555 timer, 555 timer output connection expands the circuit, expand the circuit output connection circuit breaker.

Referring to fig. 1 again, the on/off state of the shunt switch of the shunt 110 is determined by the input voltage, which is as follows:

when the input voltage is greater than the full load voltage of the output terminal, the shunt switch is turned on, and when the input voltage is less than or equal to the full load voltage of the output terminal, the shunt switch is turned off.

Referring again to fig. 3, the regulator 180 operates as follows:

the solid state relay in the regulator 180 is connected with the output connection 170 and the reposition of redundant personnel connecting wire 160, exports the circuit breaker, and two interfaces on the circuit breaker are input interface, and an interface is output interface, and two input interface of circuit breaker are controlled by 555 timer and controller, and the switch of two input interface of 555 timer control specifically as follows:

when the control output connection line 170 connection switch is turned on, power passes only through the output connection line 170, and when the control shunt connection line 160 connection switch is turned on, power passes only through the shunt connection line 160.

Referring to fig. 2 again, a voltage divider circuit is installed on the shunt connection line 160.

The invention also provides a using method of the wind power generation output overload protection device 100, and the using method of the protection device 100 is as follows:

the method comprises the following steps: the output power enters the protection device 100 through the input connecting line 200;

step two: the shunt 110 obtains the maximum bearing voltage of the output end according to a set program, then outputs the maximum bearing voltage to the output voltage stabilizer 120 through the controller, and outputs the voltage which exceeds the bearing range after shunting from the shunt voltage stabilizer 140;

step three: the output voltage is respectively regulated through the output transformer 130 and the shunt transformer 150 to obtain redundant voltage bearing space in the voltage bearing range;

step four: the output voltage enters the regulator 180, and then a circuit breaker in the regulator 180 is controlled by a 555 timer and a controller, so that the switch is performed for multiple times per second;

step five: according to the switch, the voltages of the output connection line 170 and the shunt connection line 160 are respectively output after passing through the regulator 180, and the voltage dividing circuit is started to reduce the voltage on the shunt connection line 160 to be lower than the full load voltage under the condition of overload on the shunt connection line 160.

While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the various features of the disclosed embodiments of the invention may be used in any combination, provided that no structural conflict exists, and the combinations are not exhaustively described in this specification merely for the sake of brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.