JP2000249036A - Controller for wind power generator, and control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce burden on a load of an outside such as a battery, and control a wind power generator so as to correspond the wind power device to fluctuation of wind without complicating a structure of the wind power generator. SOLUTION: A controller 20 is connected between a wind power generator provided with a decelerating circuit and a battery 2. When voltage or current of the battery 2 exceeds a predetermined value, electric connection of the wind power generator and the battery 2 is released, and control is carried out so as to output boost-up voltage to the wind power generator. Even in the case where a voltage outputted by the wind power generator exceeds voltage allowed by the battery 2, or in the case where current outputted by the wind power generator is rapidly increased at the time of gust, burden is not applied to the windmill or the battery 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device and a control method for a wind turbine generator, and more particularly to a control device and a control method for a wind turbine generator with an automatic speed reducer.

[0002]

2. Description of the Related Art In recent years, in order to protect the global environment from environmental destruction such as global warming and air pollution, wind power generators and solar power generators that generate power using natural power without using fossil energy. Equipment is being reviewed around the world.

[0003] Electric power obtained by a wind power generator, a solar power generator, or the like is usually used directly as electric power for lighting or electromotive force of a motor, or as various electric power after being temporarily stored in a storage battery. Used.

[0004] In particular, a wind power generator is obtained by generating electric power by utilizing a natural wind that fluctuates from a very strong wind such as a typhoon or a gust to a slight wind, and in an extreme case, a large wind such as no wind. Since the power becomes unstable, a wind power generator that stably obtains high-quality power that is highly efficient and easily accepted by users has been desired, and various devices have been devised.

For example, in response to a sudden change in wind speed, the rotation speed of the wind turbine is maintained at about 50% to 125% of the rated rotation speed, and the generated power (AC) is once converted to DC and then converted to AC again. There is a wind power generation device that generates electric power with stable quality by being configured to send power to an external load via a cycloconverter.

[0006]

However, the above-mentioned conventional wind turbine has the following problems.

That is, in the above wind power generator,
Although the frequency fluctuation of the generator output (AC) caused by the fluctuation of the rotation speed of the wind turbine is once converted to DC and then converted to AC again, the above-mentioned frequency fluctuation is eliminated. Because of the centrifugal force applied by the governor,
Automatic control of the blade pitch angle is performed. Therefore, the pitch control is performed frequently, and the wear of the sliding portion of the pitch angle control mechanism occurs and progresses, so that frequent maintenance is required. Further, in the case of wind energy exceeding the rated output, the wind energy is immediately released by the pitch angle control, so that precious energy is discarded. When the rate of increase of the wind speed is high, the output limitation by the pitch angle control is not enough,
In some cases, the generator output greatly exceeds the rated output value and adversely affects the voltage fluctuation to the load connected to the generator.

SUMMARY OF THE INVENTION It is an object of the present invention to reduce the load on external loads such as storage batteries, and to provide a wind power generator that can flexibly cope with wind fluctuations without complicating the structure of the wind power generator. An object of the present invention is to provide a control device and a control method capable of controlling a power generation device.

[0009]

The present invention employs the following means in order to solve the above-mentioned problems. That is, according to one aspect of the present invention, the control device of the present invention is configured such that the load voltage is greater than the first predetermined voltage, and the load is provided between the wind power generator and the load, which includes a deceleration circuit that decelerates the rotation of the wind turbine. In the control device that is connected and controls the wind power generation device,
A voltage determining unit that detects a voltage applied to the load and determines a voltage state of the load; and a voltage boosted from the detected voltage detected by the voltage determining unit to a voltage exceeding the first predetermined voltage. When the output boosting unit and the voltage detected by the voltage determination unit exceed a second predetermined voltage, disconnect the electrical connection between the wind power generator and the load, and connect the wind power generator to the wind power generator. A control unit that controls the boosting unit so that the boosting unit outputs the boosted voltage that has been boosted to a voltage higher than the predetermined voltage.

[0010] Thus, when the load is in an overvoltage state, no load is applied to the load. Note that the first predetermined voltage is a voltage that is used as a reference in determining whether the voltage of the load has an adverse effect on the wind turbine generator or the load itself, and the second predetermined voltage is an excessive voltage applied to the load. This is a reference voltage for determining whether or not a proper voltage is applied.

Further, according to one aspect of the present invention, the control device of the present invention is characterized in that the control unit is configured to connect to the wind power generation device when the voltage detected by the voltage determination unit falls below a third predetermined voltage. The load is controlled so as to be electrically connected.

[0012] Thus, when the load is in a power transmission enabled state, power can be output to the load. It should be noted that the third predetermined voltage is a reference voltage for determining whether or not the load is sufficient to permit application.

Further, according to one aspect of the present invention, a control device of the present invention includes a wind power generator having a deceleration circuit for decelerating the rotation of a windmill when a load voltage exceeds a first predetermined voltage, and a load; A current detector that detects a current flowing through the load, a booster that outputs a voltage higher than the first predetermined voltage, and a current detector that is connected to the wind turbine generator. Disconnects the electrical connection between the wind power generator and the load, and boosts the wind power generator with a voltage exceeding the first predetermined voltage when the current detected exceeds the first predetermined current. A control unit that controls the boosting unit so that the unit outputs the voltage.

Accordingly, when the load is in an overcurrent state, no load is applied to the wind turbine or the load.
Further, according to one aspect of the present invention, the control device of the present invention includes:
When the current detected by the current detection unit is lower than a second predetermined current, the control unit controls the wind power generator and the load to be electrically connected.

[0015] Thus, when the load is in a power transmission enabled state, power can be output to the load. Further, according to one aspect of the present invention, the control device of the present invention is configured such that the load voltage is higher than the first predetermined voltage, and the load is provided between the wind power generator and the load, which includes a deceleration circuit that decelerates the rotation of the wind turbine. A control device connected to the wind power generator for detecting the voltage applied to the load and determining a voltage state of the load; and a current detection unit detecting a current flowing through the load. A boosting unit that outputs a voltage obtained by boosting the detection voltage detected by the voltage determination unit to a voltage higher than the first predetermined voltage; and a voltage detected by the voltage determination unit exceeds a second predetermined voltage. Or when the current detected by the current detection unit exceeds a first predetermined current, disconnects the electrical connection between the wind power generator and the load, and The boosted voltage boosted to a voltage above a first predetermined voltage and a control section for controlling the boosting section to the booster unit outputs.

Thus, when the load is over-voltage or over-current, no load is applied to the windmill or the load. Further, according to one aspect of the present invention, the control device according to the present invention is configured such that the control unit detects when the voltage detected by the voltage determination unit falls below a third predetermined voltage, or when the voltage is detected by the current detection unit. When the generated current falls below a second predetermined current, the wind power generator is controlled to be electrically connected to the load.

Thus, when the load is in a power transmission enabled state, power can be output to the load. Further, according to one aspect of the present invention, the control device of the present invention is configured such that, when the control unit receives an external instruction, regardless of a detection result of the voltage detection unit or the current detection unit, Based on an external instruction, disconnect the electrical connection between the wind power generator and the load, and raise the boosted voltage of the wind power generator to a voltage exceeding the first predetermined voltage. The booster is controlled so as to output the voltage.

Thus, it is possible to prevent a burden on the windmill or the load based on an external instruction. Further, according to one aspect of the present invention, the control device of the present invention is configured such that, when the control unit receives an external instruction, regardless of a detection result of the voltage detection unit or the current detection unit, The wind turbine is controlled to be substantially stopped by short-circuiting the wind power generator based on an external instruction.

Thus, the decelerated wind turbine can be further substantially stopped based on an external instruction.
Further, according to one aspect of the present invention, the control device of the present invention includes:
When the control unit receives an external instruction, regardless of the detection result of the voltage detection unit or the current detection unit,
The wind power generator and the load are controlled to be electrically connected based on the external instruction.

Thus, when the load is in a power transmission enabled state, power can be output to the load according to an external instruction.

[0021]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic diagram of a configuration example of a wind power generation system to which the control device of the present invention is applied.

In FIG. 1, a wind turbine 1 is connected to a wind power generator 10 via a rotating shaft, and sends rotational energy obtained by receiving wind to the wind power generator 10. The wind power generator 10 converts (generates) rotational energy sent from the wind turbine 1 into electric energy. The control device 20
The wind turbine generator 10 is connected to the wind power generator 10 and sends the power generated by the wind power generator 10 to a load such as the storage battery 2 while controlling the wind power generator 10. Usually, windmill 1 and wind power generator 1
0 is installed outdoors, and the storage battery 2 and the control device 20 are installed indoors. Therefore, the wind power generator 10 and the control device 20 are separated by several meters or more.

FIG. 2 is a schematic circuit diagram for explaining the features of the wind power generator controlled by the control device of the present invention. In FIG. 2, a wind power generator 10 includes an AC generator 11,
Rectifier circuit 12, voltage detection circuit 13, and reduction circuit 14
And an external load (such as a storage battery) via the connection terminal ab
Connected directly or indirectly to the

The AC generator 11 converts the rotational energy of the windmill, which rotates by receiving the wind, into an AC current and outputs the AC current. The rectifier circuit 12 rectifies the AC current output from the AC generator 11 into a DC current. The voltage detection circuit 13 includes the AC generator 1
1 or the external voltage of an external load connected via the connection terminal ab. Reduction circuit 14
When the output voltage or the external voltage detected by the voltage detection circuit 13 conforms to a predetermined condition, a triac, which is one of the semiconductor switching elements, is controlled to keep the rotation of the wind turbine 1 at a constant rotation speed. The rotation of the wind turbine 1 is reduced to the constant rotation speed by turning it on and off at regular intervals.

Note that the predetermined condition is, for example,
If the detection voltage exceeds 24V, or 1
In some cases, the voltage of 4.4 V or more is maintained for 15 seconds. The wind turbine generator 10 having the above-described configuration operates as follows.

When the windmill starts to rotate in response to the wind, the AC generator 11 converts the rotational energy of the windmill into electric energy and outputs an AC current. The AC current output from the AC generator 11 is converted into a DC current by the rectifier circuit 12 and used directly as power for lighting equipment or power for power equipment, or temporarily stored in the storage battery 2. Alternatively, the electric power is transmitted to an external load via the connection terminal ab for use as commercial power.

The wind speed of the windmill increases as the wind increases, and accordingly, the AC current output from the AC generator 11 increases, and the DC current output to the outside also increases. On the other hand, if the voltage detection circuit 13 detects the output voltage of the AC generator 11 so that the external device such as a connected motor or a storage battery is not overloaded, and exceeds a predetermined voltage value, for example, 24 V, If the voltage detection circuit 13
Transmits to the deceleration circuit 14 a signal that the output voltage of the AC generator 11 has exceeded 24 V. Upon receiving the above signal, the speed reduction circuit 14 gradually reduces the rotation of the windmill 1 independently of the strength of the blowing wind, and in some cases, substantially stops the rotation thereafter.

The state in which the wind turbine is substantially stopped is a state in which the wind turbine is slightly rotated in order to prevent the freezing of the wind turbine and the like. Does not affect circuits. The state where the wind turbine is completely stopped is also included in the substantially stopped state.

Similarly, when the external voltage of the load detected by the voltage detection circuit 13 reaches the predetermined voltage value, the voltage detection circuit 13 similarly sets the external voltage to the predetermined voltage value. Is transmitted to the deceleration circuit 14, and the deceleration circuit 4 can gradually reduce the rotation of the wind turbine 1 to a constant rotation speed, and can further substantially stop the rotation.

On the other hand, when the rotation of the windmill 1 is decelerated by the deceleration circuit 14, the direct current output to the outside also decreases.
Then, when the voltage of the AC generator 11 falls below a predetermined voltage value, the speed reduction circuit 14 releases the deceleration of the windmill, and accordingly, the windmill 1 returns to the rotation speed according to the wind intensity.

That is, the wind power generator 10 generates power according to the strength of the wind, and when too strong wind blows,
The rotation of the windmill 1 is decelerated so that the windmill 1 or a connected external transmission system is not overloaded.

FIG. 3 is a block diagram of the control device according to the first embodiment of the present invention. In FIG. 3, the control device 2
Numeral 0 includes a voltage determination circuit 21, a current detection circuit 22, a control circuit 23, and a DC boost circuit 24, and is connected to the storage battery 2.

The voltage determination circuit 21 detects the voltage of the storage battery 2 and notifies the control circuit 23 of the detected voltage value when a predetermined condition is met. When the storage battery 2 has the temperature detection mechanism T, the voltage determination circuit 21 detects a voltage in consideration of the temperature information of the storage battery 2,
More accurate voltage can be detected.

The current detection circuit 22 detects a current flowing through the storage battery 2 and, when a predetermined condition is satisfied, notifies the control circuit 23 of the detected current value. The control circuit 23 controls the on / off of the electrical connection between the wind turbine generator 10 and the storage battery 2 based on the voltage value from the voltage determination circuit 21 or the current value from the current detection circuit 22, and the switch S2 and the switch The DC booster circuit 24 is controlled by turning on / off S3 (the switch S2 in FIG. 3 is in an off state, and the switch S3 is in an on state). The control circuit 23 has a timer function.

The DC boosting circuit 24 outputs a voltage value obtained by adding a predetermined voltage value to the voltage value applied to the storage battery 2 based on a control signal from the control circuit 23. FIG. 4 is an operation flowchart of the control device according to the first embodiment of the present invention.

Referring to FIG. 4, the control device 2 having the above-described configuration will be described.
An operation example of 0 will be described. First, in step ST41, the voltage determination circuit 21 detects a voltage value of the storage battery 2,
In step ST42, the detected voltage value of the storage battery 2 detected in step ST41 and a predetermined voltage value (for example, 12
V) to determine the voltage state of the storage battery 2. Here, the predetermined voltage value is a voltage value that substantially matches the maximum allowable voltage value of the storage battery 2. When the storage battery 2 has the temperature detection mechanism T, the voltage determination circuit 21
By detecting the voltage in consideration of the temperature information of the storage battery 2, a more accurate voltage is detected.

If it is determined in step ST42 that the detected voltage value is higher than the predetermined voltage value (ST42: YE
S) In step ST43, the control circuit 23
Upon receiving the detected voltage value from the voltage determination circuit 21, the wind turbine generator 10 and the storage battery 2 are electrically disconnected, and at the same time, the built-in timer is operated (start, restart, or continue). Further, in step ST44, the control circuit 23 controls the DC step-up circuit 24 by turning off the switch S3 which is in the on state and turning on the switch S2 which is in the off state.
The above-described wind power generation is performed through the connection terminals a′b ′ and ab via the connection terminals a′b ′ and ab. Send to device 10. Here, the fact that the detected voltage value is higher than the predetermined voltage value means that a voltage equal to or higher than the voltage value that can be tolerated by the storage battery 2 is stored in the storage battery 2.
Means to join.

When it is not determined in step ST42 that the detected voltage value exceeds a predetermined voltage value (ST4).
2: NO), in step ST45, the current detection circuit 22 detects the value of the current flowing through the storage battery 2, and in step ST46, compares the detected current value detected in step ST45 with a predetermined current value.

When it is determined in step ST46 that the detected current value exceeds a predetermined current value (ST46: YE
S) In step ST43, the control circuit 23
The wind turbine generator 10 and the storage battery 2 are electrically separated from each other, as in the case where the detected current value is received from the current detection circuit 22 and the detected voltage value is determined to be higher than the predetermined voltage value in step ST42. At the same time, activate (start, restart or continue) the built-in timer. Further, in step ST44, the control circuit 23 controls the DC step-up circuit 24 by turning off the switch S3 which is in the on state and turning on the switch S2 which is in the off state. The detected voltage value is increased until the circuit 14 meets the condition for decelerating the wind turbine 1. Then, the boosted voltage value is applied to the connection terminal a '.
It is sent to the wind power generator 10 via b 'and ab. Here, that the detected current value exceeds the predetermined current value means that an excessive current flows through the storage battery 2.

If it is not determined in step ST46 that the detected current value exceeds the predetermined current value (ST46:
NO) In step ST47, it is detected whether or not a timer built in the control circuit 23 is operating.

If it is determined in step ST47 that the timer is running (ST47: YES), the process returns to step ST41. That is, the fact that the timer is running means that the detected voltage value detected by the voltage determination circuit 21 is higher than the predetermined voltage value, or that the detected current value detected by the current detection circuit 22 is equal to the predetermined current value. This is because the value has exceeded the value, and it is necessary to maintain the state as it is.

If it is not detected in step ST47 that the timer is running (ST47: NO), in step ST48, the control circuit 23 electrically connects the wind power generator 10 and the storage battery 2 to each other. The power generated by the wind power generator 10 can be stored in the storage battery 2. That is, the fact that the timer is not operating means that the detected voltage value detected by the voltage determination circuit 21 does not exceed the predetermined voltage value and the current detection circuit 22
Means that the detected current value does not exceed the predetermined current value, or the voltage determination circuit 2
1 has exceeded the predetermined voltage value, or the detection current value detected by the current detection circuit 22 has exceeded the predetermined current value. Cut).

In the above description, the deceleration circuit 14 decelerates the wind turbine 1, but the deceleration circuit 14
After the wind turbine 1 is decelerated, the wind turbine 1 can be substantially stopped. Further, similarly to a second embodiment described later,
The control circuit 23 makes the wind power generator 1 substantially stop after the deceleration.
It can also be performed by controlling 0.

After the end of step ST48 or step ST44, the process returns to step ST41, and since steps ST41 to ST48 are repeatedly executed, in the description of step ST43, the wind power generator 10 and the storage battery 2 are connected. Although the electrical disconnection has been performed, the electrical disconnection state may already be established, and in that case, the state is maintained.
In the description of step ST44, the DC booster circuit 24 is controlled by turning off the switch S3 in the on state and turning on the switch S2 in the off state. S
3 may be in an off state and the switch S2 may be in an on state. In that case, the off state or the on state is maintained, respectively.

The timer built in the control circuit 23 can set an arbitrary time. According to the first embodiment of the present invention described above, when the storage battery 2 is in an overvoltage state or an overcurrent state, the charging of the storage battery 2 is stopped and the charging voltage of the storage battery 2 is used. By supplying the boosted voltage to the wind turbine generator 10, the boosted voltage is detected by the voltage detection circuit 13, and the storage battery 2 is made to appear as if it is fully charged. 11 can reduce the generated power. As a result, even when the generated power of the wind power generator 10 is increased by a strong wind or a gust, the generated power can be forcibly operated to reduce the generated power. An overvoltage state or an overcurrent state can be immediately avoided, and the storage battery 2 can be protected effectively and reliably.

FIG. 5 is a configuration diagram of a control device according to the second embodiment of the present invention. The same reference numerals are used for the same components as those in the first embodiment. In FIG. 5, a control device 20 'is different from the control device 20 in the first embodiment in that an interface unit 50, a button unit 51, and a remote control unit 5 are further provided.
2 and a network connection unit 53.

Hereinafter, the second embodiment will be described focusing on the differences from the above-described first embodiment. The interface unit 50 is an interface for transmitting an instruction from an external operator or device (hereinafter, referred to as an operator) to the control circuit 23 '. The button unit 51 has one or a plurality of button switches and the like.
3 '. The remote control unit 52 controls the control circuit 2 based on the content of the operator's instruction from a remote controller or the like.
3 '. Further, the network connection unit 53 can instruct the control circuit 23 'of the operator's instruction content from a network line such as a telephone line or a wireless line.

The control circuit 23 ′ controls the wind power generator 10 and the storage battery 2 based on an instruction from the operator via the interface section 50, the voltage value from the voltage determination circuit 21 or the current value from the current detection circuit 22. The DC booster circuit 24 is controlled by turning on / off the electrical connection of the switch and turning on / off the switches S2 and S3 (the switch S2 in FIG. 5 is in an off state, and the switch S3 is in an on state). Further, based on an instruction from the operator via the interface unit 50, the switch S1 is turned on (FIG. 5).
When the middle switch S1 is turned off, the wind power generator 10 is short-circuited and the wind turbine 1 is substantially stopped. Note that the control circuit 23 'has a timer function. Further, the diode D is such that the switches S2 and S3 are F
When the switch is turned on when the switch is configured by an ET (field effect transistor), the wind power generator 1
This is a diode for preventing backflow of the current of the storage battery 2 when 0 is short-circuited.

FIG. 6 is an operation flowchart of the control device according to the second embodiment of the present invention. The same steps as those in the first embodiment are denoted by the same step numbers.

Referring to FIG. 6, an operation example of the control device 20 'having the above-described configuration will be described focusing on steps different from those of the first embodiment. First, in step ST61, it is determined whether or not there is an instruction from the operator using the button unit 51, the remote control unit 52, or the network connection unit 53 via the interface unit 50.

If it is determined in step ST61 that there is an instruction from the operator (ST61: YES), the process proceeds to step S61.
At T62, it is determined whether the instruction is an instruction to decelerate the windmill 1 or an instruction to return the rotation of the windmill 1 that has been decelerated to the original state.

If the determination in step ST62 is an instruction to decelerate the windmill 1 (ST62: YES),
In step ST43, similarly to the case described with reference to FIG. 4 in the first embodiment, the wind power generator 10 and the storage battery 2 are electrically disconnected, and at the same time, the built-in timer is activated (startup, restart). Or continue). Further, in step ST44, the control circuit 23 'controls the DC booster circuit 24 by turning off the switch S3 in the on state and turning on the switch S2 in the off state. The detected voltage value is increased until the speed reduction circuit 14 meets the condition for decelerating the wind turbine 1. Then, the boosted voltage value is sent to the wind turbine generator 10 via the connection terminals a'b 'and ab.
When an instruction for substantially stopping after the deceleration is included together with an instruction for decelerating the wind turbine 10, the switch S <b> 1 that is in the off state is turned on, thereby turning on the wind turbine 10. 10 is short-circuited, and the wind turbine 1 is substantially stopped.

When the judgment in step ST62 is not an instruction to decelerate the wind turbine 1 (ST62: NO)
As in the case described with reference to FIG. 4 in the first embodiment, in step ST47, it is detected whether or not the timer incorporated in the control circuit 23 'is operating, and in step ST47, the timer is activated. If it is detected that the operation is performed (ST47: YES), the process returns to step ST61.
Here, the fact that the timer is running is because the operator has issued the instruction under the intention of decelerating the windmill 1, so that it is necessary to maintain the state as it is.

It should be noted that the fact that the timer is not running in step ST47 following the flow from step ST46 means that the voltage determination circuit 21 detects the same as in the case of the first embodiment described with reference to FIG. The detected voltage value does not exceed the predetermined voltage value, and the current detection circuit 2
2 means that the detected current value has not exceeded the predetermined current value, or whether the detected voltage value detected by the voltage determination circuit 21 has exceeded the predetermined voltage value, or Although the detected current value detected by the detection circuit 22 was higher than the predetermined current value, it means that a predetermined time has elapsed (the timer has expired). However, step ST following the flow from step 62
The fact that the timer is not running at 47 means that the operator has no intention to decelerate the windmill 1 or that the timer has expired because the time set by the operator has elapsed.

The first and second embodiments of the present invention have been described above. However, as long as the functions of the present invention are executed, the present invention is not limited to these embodiments. Needless to say, the present invention can be applied to a single device, a system including a plurality of devices, or an integrated device, or a system in which processing is performed via a network such as a LAN or a WAN.

Further, a CPU connected to the bus, a memory such as a ROM or a RAM, an input device, an output device, an external recording device,
The present invention can also be realized by a system including a medium driving device, a portable recording medium, and a network connection device. That is, a ROM or RAM memory, an external recording device, or a portable recording medium storing the program code of software for realizing the system of each of the embodiments described above is supplied to the system or the device, and the computer of the system or the device is supplied. Can also be achieved by reading and executing the program code.

In this case, the program code itself read from the recording medium realizes the novel function of the present invention, and a portable recording medium or the like on which the program code is recorded constitutes the present invention. .

As a portable recording medium for supplying the program code, for example, a floppy disk, hard disk, optical disk, magneto-optical disk, CD-RO
M, CD-R, DVD-ROM, DVD-RAM, magnetic tape, nonvolatile memory card, ROM card, various types of data recorded via a network connection device (in other words, a communication line) such as e-mail and personal computer communication. A recording medium or the like can be used.

Further, the functions of the above-described embodiment are realized by the computer executing the program code read out on the memory, and the OS running on the computer is executed based on the instructions of the program code.
Perform part or all of the actual processing, and the functions of the above-described embodiments are also realized by the processing.

Further, after the program code read from the portable recording medium is written to a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer, the program code is transmitted according to the instruction of the program code. Based on this, the CPU or the like provided in the function expansion board or function expansion unit performs part or all of the actual processing, and the functions of the above-described embodiments can also be realized by the processing.

That is, the present invention is not limited to the above-described embodiments, and can take various configurations or shapes without departing from the gist of the present invention.

[0062]

As described in detail above, the control device or the control method of the present invention reduces the load on an external load such as a storage battery, and furthermore, does not complicate the structure of the wind power generation device. The wind power generator can be controlled so that the device can flexibly respond to wind fluctuations.

Further, according to one aspect of the present invention, the control device of the present invention includes a wind power generator having a deceleration circuit for decelerating the rotation of a windmill when a load voltage exceeds a first predetermined voltage, and a load. A control circuit for controlling the wind turbine generator, which detects a voltage applied to the load, determines a voltage state of the load, and detects a current flowing through the load. A current detection circuit, a booster circuit that outputs a voltage obtained by boosting the detection voltage detected by the voltage determination circuit to a voltage exceeding the first predetermined voltage, and a voltage detected by the voltage determination circuit being a second predetermined voltage When the current exceeds the first predetermined current, or when the current detected by the current detection circuit exceeds a first predetermined current, disconnect the electrical connection between the wind turbine generator and the load, and A control circuit that controls the booster circuit so that the booster circuit outputs a voltage higher than the boosted voltage that has been boosted to the first predetermined voltage for the wind power generation device. Even when the voltage output by the wind power generator exceeds the above, no load is placed on the wind turbine or the transmission system, and the current output by the wind power generator suddenly increases in a gust or the like. Even if it increases, no load is imposed on the windmill or the load.

Further, according to one aspect of the present invention, the control device of the present invention is arranged such that the control circuit detects whether the voltage detected by the voltage determination circuit falls below a third predetermined voltage, When the current detected by the circuit falls below a second predetermined current, the wind power generator and the load are controlled so as to be electrically connected to each other, so that the wind power generator with respect to the voltage allowed by the load is controlled. Even if the output voltage of the wind power generation device falls, or even if the current output by the wind power generation device suddenly decreases due to the weakening of the wind, the power is immediately re-output to the load. be able to.

Further, according to one aspect of the present invention, the control device of the present invention is arranged such that, when the control circuit receives an instruction from outside, the control circuit is irrelevant to the detection result of the voltage detection circuit or the current detection circuit. Without, based on the instruction from the outside, disconnect the electrical connection between the wind power generator and the load,
In addition, by controlling the booster circuit so that the booster circuit outputs the boosted voltage that has been boosted to a voltage higher than the first predetermined voltage for the wind power generation device, an operator from the outside desires. Based on the instruction, the load on the windmill or the load can be prevented.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a configuration example of a wind power generation system to which a control device of the present invention is applied.

FIG. 2 is a schematic circuit diagram for explaining features of a wind turbine generator controlled by a control device of the present invention.

FIG. 3 is a configuration diagram of a control device according to the first embodiment of the present invention.

FIG. 4 is an operation flowchart of the control device according to the first embodiment of the present invention.

FIG. 5 is a configuration diagram of a control device according to a second embodiment of the present invention.

FIG. 6 is an operation flowchart of a control device according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Windmill 2 Storage battery 10 Wind power generator 11 AC generator 12 Rectifier circuit 13 Voltage detection circuit 14 Reduction circuit 20, 20 'Control device 21 Voltage judgment circuit 22 Current detection circuit 23, 23' Control circuit 24 DC booster circuit 50 Interface part 51 Button 52 Remote control 53 Network connection

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3H078 AA26 BB06 BB19 BB30 CC13 CC32 CC66 CC73 5G004 AA01 AB02 BA08 CA03 DC01 FA01 5H590 AA30 AB01 AB02 CA14 CB10 CD01 CD10 CE05 CE08 EB02 EB21 FA01 FA08 FB01 FC02 HA04 HA18 JA02 JA09 JB02

Claims (20)

[Claims] A control device is connected between a load and a wind power generator having a deceleration circuit for decelerating the rotation of a wind turbine when a load voltage exceeds a first predetermined voltage, and controls the wind power generator. Voltage determining means for detecting a voltage applied to the load and determining a voltage state of the load; and a voltage boosted from the detected voltage detected by the voltage determining means to a voltage exceeding the first predetermined voltage. When the voltage detected by the voltage determining means exceeds a second predetermined voltage, the electrical connection between the wind power generator and the load is disconnected, and the wind power generator is connected to the wind power generator. A control unit for controlling the boosting means so that the boosting means outputs the boosted voltage boosted to a voltage higher than the first predetermined voltage. 2. The control means controls the wind power generator and the load to be electrically connected when a voltage detected by the voltage determination means falls below a third predetermined voltage. The control device according to claim 1. 3. A control device connected between a load and a wind power generator having a deceleration circuit for decelerating rotation of a wind turbine when a load voltage exceeds a first predetermined voltage, and controlling the wind power generator. Current detecting means for detecting a current flowing through the load; boosting means for outputting a voltage higher than the first predetermined voltage; and when the current detected by the current detecting means exceeds a first predetermined current, Control means for disconnecting an electrical connection between the wind power generator and the load, and controlling the booster so that the booster outputs a voltage exceeding the first predetermined voltage to the wind power generator. A control device, comprising: 4. The control means controls the wind power generator to be electrically connected to the load when a current detected by the current detection means falls below a second predetermined current. The control device according to claim 3, wherein 5. A control device connected between a load and a wind power generator having a deceleration circuit for decelerating the rotation of a wind turbine when a load voltage exceeds a first predetermined voltage and controlling the wind power generator. Voltage detecting means for detecting a voltage applied to the load and determining a voltage state of the load; current detecting means for detecting a current flowing through the load; and detecting the detected voltage detected by the voltage determining means. A booster for outputting a voltage boosted to a voltage higher than the first predetermined voltage; and a current detected by the current detector when the voltage detected by the voltage determiner exceeds a second predetermined voltage. When the current exceeds a first predetermined current, an electrical connection between the wind power generator and the load is disconnected, and the boosted power that has been boosted to a voltage higher than the first predetermined voltage is applied to the wind power generator. A control device, characterized in that it comprises a control means for controlling the booster means so as to output the said boosting means. 6. The control means, when the voltage detected by the voltage determination means falls below a third predetermined voltage, or when the current detected by the current detection means falls below a second predetermined current, The control device according to claim 5, wherein the control is performed so as to electrically connect the wind power generation device and the load. 7. When there is an instruction from the outside, the control means, based on the instruction from the outside, regardless of the detection result of the voltage detection means or the current detection means, Disconnecting the electrical connection with the load,
7. The boosting unit according to claim 1, wherein the boosting unit controls the boosting unit so as to output the boosted voltage to the wind power generator to a voltage higher than the first predetermined voltage. The control device according to claim 1. 8. When there is an instruction from the outside, the control means controls the wind power generator based on the instruction from the outside irrespective of the detection result of the voltage detection means or the current detection means. The control device according to claim 7, wherein the control is performed such that the wind turbine is substantially stopped by short-circuiting. 9. When there is an instruction from the outside, the control means, based on the instruction from the outside, regardless of the detection result of the voltage detection means or the current detection means, The control device according to claim 7, wherein the control is performed so as to be electrically connected to the load. 10. The control device according to claim 1, wherein the load is a storage battery that stores an amount of electricity. 11. The control device according to claim 10, wherein the voltage detection means detects a voltage in consideration of temperature information of the storage battery. 12. A control method for controlling a wind power generator connected to a load and including a deceleration circuit for decelerating the rotation of a wind turbine when a load voltage exceeds a first predetermined voltage, wherein the control is applied to the load. Detecting a voltage and determining a voltage state of the load; outputting a voltage obtained by boosting the detected voltage to the first predetermined voltage; and when the detected voltage exceeds a second predetermined voltage, Disconnecting the electrical connection between the wind power generator and the load, and controlling the wind power generator to output the boosted voltage boosted to a voltage exceeding the first predetermined voltage. A control method characterized in that: 13. The control method according to claim 12, wherein when the detected voltage is lower than a third predetermined voltage, the wind turbine generator is electrically connected to the load. The control method described in 1. 14. A control method for controlling a wind power generator connected to a load and including a deceleration circuit for decelerating the rotation of a wind turbine when a load voltage exceeds a first predetermined voltage, wherein a current flowing through the load is detected. Performing the first predetermined voltage; disconnecting an electrical connection between the wind power generation device and the load when the detected current exceeds the first predetermined current; Controlling the device to output a voltage higher than the first predetermined voltage. 15. The control method according to claim 14, wherein when the detected current falls below a second predetermined current, the wind power generator and the load are electrically connected. The control method described in 1. 16. A control method for controlling a wind turbine generator having a deceleration circuit connected to a load and decelerating the rotation of a wind turbine when a load voltage exceeds a first predetermined voltage, wherein the control is applied to the load. Detecting a voltage to determine a voltage state of the load; detecting a current flowing through the load; outputting a voltage obtained by increasing the detected voltage to a voltage higher than the first predetermined voltage; When the detected voltage exceeds a second predetermined voltage, or when the detected current exceeds a first predetermined current, disconnects an electrical connection between the wind power generator and the load, and
Controlling the wind power generation device to output the boosted voltage that has been boosted to a voltage higher than the first predetermined voltage. 17. The method according to claim 17, wherein the controlling step includes: electrically connecting the wind power generator and the load when the detected voltage is lower than a third predetermined voltage or when the detected current is lower than a second predetermined current. The control method according to claim 16, wherein the control is performed such that the connection is established. 18. The control step, when an external instruction is received, regardless of a detection result of the voltage detection step or the current detection step, based on the external instruction, An electrical connection with the load is cut off, and control is performed such that the wind turbine generator outputs the boosted voltage boosted to a voltage exceeding the first predetermined voltage. 1
8. The control method according to any one of items 7 to 7. 19. The method according to claim 19, wherein the control step further comprises: receiving a command from the outside, based on the command from the outside, regardless of a detection result of the voltage detecting step or the current detecting step. 19. The control method according to claim 18, wherein the control is performed so that the wind turbine is substantially stopped by short-circuiting the device. 20. The control step, when an external instruction is received, regardless of a detection result of the voltage detection step or the current detection step, based on the external instruction, 19. The control method according to claim 18, wherein control is performed so as to electrically connect the load.