JP2013141370A - Automatic generator voltage regulation apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic generator voltage regulation apparatus that is inexpensively compatible with a different generator voltage regulation method in accordance with specifications of a generator to be controlled while maintaining the same reliability and availability factor as an existing duplex configuration.SOLUTION: The automatic generator voltage regulation apparatus includes: a plurality of service automatic voltage regulation devices 110 having electrical quantity input means 112 for capturing voltages/currents of a plurality of generators 101, means 114 for control outputs to the generators 101, and digital arithmetic means 111; and a single standby automatic voltage regulation device 410 having electrical quantity input means 412, digital arithmetic means 411 and control output means 414. An input/output switch 421 is further provided for, in the event of an anomaly in any one of the service automatic voltage regulation devices 110, detecting the anomaly and switching input/output signals from the anomalous service automatic voltage regulation device 110 to the standby automatic voltage regulation device 410. A voltage of the generator 101 having been controlled by the anomalous service automatic voltage regulation device 110 is regulated in accordance with characteristics of the generator 101.

Description

  The present invention relates to a generator automatic voltage regulator applied to a combined power generation facility.

In the automatic generator voltage regulator applied to the conventional power generation equipment, the control point to the input conversion unit that inputs voltage and current from the instrument transformer of the generator main circuit, the CPU unit that performs control calculation, and the thyristor excitation device It is composed of an ignition unit that outputs an arc pulse, etc., but these functional units are provided with two units, a normal system and a standby system, and have a highly reliable dual configuration. In the case of a combined power generation facility composed of a plurality of generators of different steam turbine generators and gas turbine generators, double generator automatic voltage regulators are installed for the number of generators.
As with the automatic generator voltage regulator, generator auxiliary equipment is an important facility, but providing all auxiliary equipment with spare auxiliary equipment has room for improvement in terms of installation space and cost. Therefore, a spare auxiliary machine control device that shares a spare auxiliary machine and can smoothly operate the spare auxiliary machine has been proposed (for example, see Patent Document 1).

JP-A-8-182224 (paragraph [0012], FIG. 1)

In the configuration in which dual automatic voltage regulators for the number of generators are applied to each generator, the operating rate is high, but the manufacturing cost is high. There is a problem in terms of.
Further, the apparatus proposed in Patent Document 1 is based on the premise that all of a plurality of common auxiliary machines are the same, and there is a problem that it cannot be applied as it is when the specifications of the common auxiliary machines are different.

  This invention has been made to solve the above problems, and according to the specifications of the generator to be controlled while maintaining the same reliability and operating rate as the conventional duplex configuration, It is an object of the present invention to provide a low-cost generator automatic voltage regulator that can be used even when the generator voltage regulation method of the normal system automatic voltage regulator is different.

  The generator automatic voltage regulator according to the present invention includes a normal system electric quantity input means for taking in a generator voltage / current of each of a plurality of generators operating in parallel as an electric quantity input signal, and to each generator. A plurality of normal system automatic voltage regulators, including a normal system control output means for generating a generator field current control command that is a control output signal of the system, and a normal system digital calculation means for automatically adjusting the generator voltage; In addition to the normal system automatic voltage regulator, a standby system electric quantity input means for taking in the generator voltage and current of each generator as an electric quantity input signal, respectively, and a generator field that is a control output signal to each generator. The standby system control output means for generating the current control command and the standby system digital calculation means for automatically adjusting the generator voltage are different from each other in the standby system automatic voltage regulator and the normal system automatic voltage regulator. When this occurs, an input / output switch that detects this abnormality and switches the input / output of the electric quantity input signal and the control output signal from the normal automatic voltage regulator in which the abnormality has occurred to the standby automatic voltage regulator is provided. The standby automatic voltage adjusting device has a function of adjusting the voltage of the generator according to the characteristics of the generator to be controlled by the normal automatic voltage adjusting device in which an abnormality has occurred.

  The generator automatic voltage regulator according to the present invention includes a normal system electric quantity input means for taking in a generator voltage / current of each of a plurality of generators operating in parallel as an electric quantity input signal, and to each generator. A plurality of normal system automatic voltage regulators, including a normal system control output means for generating a generator field current control command that is a control output signal of the system, and a normal system digital calculation means for automatically adjusting the generator voltage; In addition to the normal system automatic voltage regulator, a standby system electric quantity input means for taking in the generator voltage and current of each generator as an electric quantity input signal, respectively, and a generator field that is a control output signal to each generator. The standby system control output means for generating the current control command and the standby system digital calculation means for automatically adjusting the generator voltage are different from each other in the standby system automatic voltage regulator and the normal system automatic voltage regulator. When this occurs, an input / output switch that detects this abnormality and switches the input / output of the electric quantity input signal and the control output signal from the normal automatic voltage regulator in which the abnormality has occurred to the standby automatic voltage regulator is provided. The standby automatic voltage regulator is provided with a function of adjusting the voltage of the generator according to the characteristics of the generator to be controlled by the normal automatic voltage regulator in which an abnormality has occurred. Thus, it is possible to provide a low-cost automatic generator voltage regulator that can be used even when the generator voltage adjustment method of the regular automatic voltage regulator is different, while maintaining the same reliability and operating rate.

BRIEF DESCRIPTION OF THE DRAWINGS It is a system whole block diagram which concerns on the generator automatic voltage regulator of Embodiment 1 of this invention. It is a whole system block diagram concerning the generator automatic voltage regulator of Embodiment 2 of this invention. It is explanatory drawing of the backup priority order determination function which concerns on the generator automatic voltage regulator of Embodiment 3 of this invention. It is a processing flow figure of the backup priority order judgment function concerning the generator automatic voltage regulator of Embodiment 3 of this invention. It is explanatory drawing of the stand-by position which concerns on the generator automatic voltage regulator of Embodiment 4 of this invention. It is function explanatory drawing which concerns on the generator automatic voltage regulator of Embodiment 4 of this invention.

Embodiment 1 FIG.
The first embodiment is provided with each normal automatic voltage regulator corresponding to a plurality of generators in a combined power generation facility and one standby automatic voltage regulator, and the capacity and specifications of the plurality of generators. Therefore, the present invention relates to an automatic generator voltage regulator that can cope with the occurrence of an abnormality in the regular automatic voltage regulator even if the voltage regulation method is different.
Hereinafter, the configuration and operation of the first embodiment of the present invention will be described with reference to FIG. 1 which is an overall system configuration diagram of a generator automatic voltage regulator for combined power generation.

FIG. 1 shows a configuration of an entire electric system of a combined power plant including a generator automatic voltage regulator for combined power generation. In FIG. 1, the electric system includes three generators 101, 201, 301, generator breakers 107, 207, 307, a main transformer 108 that boosts the voltage to the power transmission system, and electric power such as the power transmission system 109. The facilities are connected to each other by circuit breakers and disconnectors to form a single power grid.
A dc field current is supplied from the thyristor excitation devices 103, 203, and 303 to the corresponding field windings 102, 202, and 302 of the generators via the field breakers 104, 204, and 304, respectively. Voltage control is performed by adjusting the field current.

Next, the configuration of the generator automatic voltage regulator 1 will be described.
In the first embodiment, as an example, the automatic generator voltage regulator 1 includes three normal automatic voltage regulators 110, 210, and 310 corresponding to three generators 101, 201, and 301 and one standby system. The case where it comprises the automatic voltage regulator 410 is demonstrated.
The first to third common system automatic voltage regulators 110, 210, and 310 have the same configuration and the same functions and operations. Therefore, in the following description, the first regular system automatic voltage regulator is described unless otherwise required. 110 will be described as a representative.
In addition, in the specification and drawings, for example, “formal system input conversion unit 112” should be officially described. However, when it is clear that “ordinary system” is indicated by a number or the like, “common system” is omitted. And described as “input conversion unit 112”.

The first common system automatic voltage regulator 110 is a regular system device that adjusts the field current of the field winding 102 of the generator 101, and includes a regular system CPU unit 111 that performs control calculation, and a generator main circuit. An input converter unit 112 for inputting voltage and current from the voltage detector 105 and the current detector 106, which are instrument transformers, and a digital signal that can be processed by the normal CPU unit 111 for the output of the normal input converter unit 112. A normal system analog input unit 113 for conversion and a normal system ignition unit 114 for outputting a control firing pulse output signal to the thyristor excitation device 103 in order to adjust the field current of the field winding 102 of the generator 101. It is configured and is a single-system configuration.
The normal system digital operation means corresponds to the normal system CPU unit 111, the normal system electric quantity input means corresponds to the normal system input conversion unit 112 and the normal system analog input unit 113, and the normal system control output means corresponds to the normal system point. The arc unit 114 corresponds, and the generator field current control command corresponds to a control firing pulse output signal.

  The second normal system automatic voltage regulator 210 and the third regular system automatic voltage regulator 310 also have the same single-layer configuration as the first regular system automatic voltage regulator 110, and each of the generators 201 and 301 has the same configuration. The field current of the field windings 202 and 302 is adjusted.

Each of the normal system automatic voltage regulators 110, 210, 310 has a self-diagnosis function (not shown) for detecting an abnormality inside, and the detected abnormal signal is transmitted to the standby system automatic voltage regulator 410, specifically Specifically, the data is output to the input / output switching devices 421, 422, and 423 described later.
Note that the generator automatic voltage regulator is normally provided with a voltage setting device that can be manually operated, but is omitted in FIG.

Next, the configuration of standby system automatic voltage regulator 410 will be described.
The standby system automatic voltage adjustment device 410 includes a standby system CPU unit 411, a standby system input conversion unit 412, a standby system analog input unit 413, and a standby system ignition unit 414, similarly to the first normal system automatic voltage adjustment device 110. Prepare. The standby system automatic voltage regulator 410 includes input / output switchers 421, 422, and 423 having a function of switching input / output from the normal system to the standby system. Further, the standby system automatic voltage regulator 410 determines which normal system automatic voltage regulator has become abnormal, and performs first voltage adjustment in order to perform voltage adjustment according to the capacity / specification of the corresponding generator. A digital input unit 415 is provided for receiving information on the normal automatic voltage regulator in which an abnormality has occurred from the switch 421.
The input / output switching devices 421, 422, and 423 have positions (input / output contacts) that can switch the connection of the generators 101, 201, and 301 to each other. A voltage and current input signal can be input from the circuit and a control firing pulse output signal can be output. Specifically, the voltage signal from the generator voltage detector and the current signal from the generator current detector are input to the standby system input conversion unit 412 of the standby system automatic voltage regulator 410, and the standby system ignition unit. A control firing pulse output signal is output from 414 to the thyristor excitation device of the generator.
The standby system digital operation means corresponds to the standby system CPU unit 411, the standby system electric quantity input means corresponds to the standby system input conversion unit 412 and the standby system analog input unit 413, and the standby system control output means corresponds to the standby system point. The arc unit 414 corresponds.

The standby system automatic voltage regulator 410 has a single system configuration like the first normal system automatic voltage regulator 110, but the field windings 102, 202 of the three generators 101, 201, 301, This is a standby shared device that adjusts the field current of 302. When the normal automatic voltage regulator loses its function due to an abnormality, the input / output switches 421, 422, and 423 input / output from the normal system to the standby system. And the standby CPU unit 411 is appropriately adapted to the capacity / specifications of the generator to which the standby system CPU unit 411 corresponds based on the information of the normal system automatic voltage regulator in which the abnormality received by the digital input unit 415 via the input / output switch 421 has occurred. Correct voltage adjustment.
The program necessary for voltage adjustment of each generator is stored in advance in the memory of the standby system CPU unit 411 of the standby system automatic voltage regulator 410. A corresponding program is selected and executed based on information indicating whether an abnormality has occurred in the normal system automatic voltage regulator.

Next, as an example, the operation of the standby system automatic voltage regulator 410 when an abnormality occurs in the first regular system automatic voltage regulator 110 and the function is lost will be described.
The standby automatic voltage regulator 410 detects an abnormality of the first normal automatic voltage regulator 110 and sets the input / output destination of the standby automatic voltage regulator 410 to be controlled by the first normal automatic voltage regulator 110. The voltage detector 105 and the current detector 106 in the main circuit of the generator 101 are switched to and the voltage and current signals of the generator 101 are input. Further, the standby system automatic voltage adjustment device 410 outputs an ignition pulse signal from the standby system ignition unit 414 to the thyristor excitation device 103 of the generator 101 to perform an appropriate voltage adjustment according to the capacity and specifications of the generator 101. .
For this reason, even if an abnormality occurs in the first normal system automatic voltage regulator 110 and the function is lost, the automatic voltage control of the generator 101 can be continued and the operating rate of the generator 101 is maintained. can do.

In the description of the first embodiment, the path for receiving the information of the normal automatic voltage regulator in which an abnormality has occurred is received by the digital input unit 415 via the input / output switch 421. However, the input / output switch 422 or the input / output switch 423. In addition, an abnormal signal of the normal system automatic voltage regulator can be directly received by the digital input unit 415.
In the first embodiment, the case of three generators is described as an example. However, the number of generators and the number of regular automatic voltage regulators corresponding to each generator are not limited thereto.

  As described above, in the generator automatic voltage regulator 1 according to the first embodiment, a plurality of normal automatic voltage regulators and a common standby automatic voltage regulator corresponding to a plurality of generators. The standby automatic voltage regulator stores the voltage adjustment method corresponding to the capacity and specifications of each of the multiple generators, and even if an abnormality occurs in the regular automatic voltage regulator, the corresponding generator The generator voltage can be adjusted according to the capacity and specifications. Therefore, it is not necessary for all the normal system devices to have a standby redundant dual configuration, while maintaining the same reliability and operating rate as the conventional dual configuration, Even if the voltage adjustment method is different, there is an effect that it is possible to provide a low-cost generator automatic voltage adjustment device with a simple configuration that can be handled.

Embodiment 2. FIG.
The automatic generator voltage regulator 2 according to the second embodiment has an input / output switching function for detecting an abnormality of the normal automatic voltage regulator in the standby automatic voltage regulator of the automatic generator voltage regulator 1 according to the first embodiment. A general service abnormality detector 530 is provided separately from the instrument.

  FIG. 2 is an overall system configuration diagram of the generator automatic voltage regulator 2 according to the second embodiment. In FIG. 2, the same or corresponding parts as in FIG.

  The difference between the generator automatic voltage regulator 2 according to the second embodiment and the generator automatic voltage regulator 1 according to the first embodiment is that the standby automatic voltage regulator 510, particularly the input / output switchers 521, 522, and 523. Since this is the common system abnormality detector 530, the difference will be mainly described.

First, the configuration of the generator automatic voltage regulator 2 according to the second embodiment will be described with a focus on the standby system automatic voltage regulator 510 that is a difference from the first embodiment.
Standby system automatic voltage regulator 510 includes standby system CPU unit 411, standby system input conversion unit 412, standby system analog input unit 413, and standby system ignition unit 414. The standby automatic voltage regulator 510 includes input / output switchers 521, 522, and 523 having a function of switching input / output from the normal system to the standby system. Further, the standby system automatic voltage adjustment device 510 receives the abnormality signal from the normal system automatic voltage adjustment device in an integrated manner, determines which normal system automatic voltage adjustment device is abnormal, and outputs it. A container 530 is provided. Further, a digital input unit 415 is provided for receiving information on the normal automatic voltage regulator in which an abnormality has occurred in order to perform voltage adjustment in accordance with the capacity / specification of the corresponding generator.
The input / output switchers 521, 522, and 523 have positions (input / output contacts) that can switch the connection of the generators 101, 201, and 301 to each other. A voltage and current input signal is input from the circuit, and a control firing pulse output signal is output.
The input / output switchers 521, 522, and 523 in the standby automatic voltage regulator 510 of the second embodiment do not have a function of receiving an abnormal signal from the normal automatic voltage regulator. The normal system abnormality detector 530 generally receives an abnormality signal from the normal system automatic voltage regulator, determines which normal system automatic voltage regulator has an abnormality, and uses this information as the input / output switch 521. 522, 523 and the digital input unit 415.

Next, as an example, the operation of the standby system automatic voltage regulator 510 when an abnormality occurs in the first normal system automatic voltage regulator 110 will be described.
When an abnormality occurs in the first normal system automatic voltage adjustment device 110 and the function is lost, the first normal system automatic voltage adjustment device 110 detects this abnormality by a self-diagnosis function, and the first normal system automatic voltage adjustment The fact that an abnormality has occurred in device 110 is output to normal system abnormality detector 530 of standby system automatic voltage regulator 510. The normal system abnormality detector 530 receives this abnormality signal, detects that an abnormality has occurred in the first normal system automatic voltage regulator 110, and uses this information as input / output switches 521, 522, 523 and digital information. Output to the input unit 415.
The input / output destination of the standby system automatic voltage regulator 510 is switched to the voltage detector 105 and the current detector 106 in the main circuit of the generator 101 that is the control target of the first normal system automatic voltage regulator 110 to change the generator 101. In addition, the standby system ignition unit 414 outputs an ignition pulse signal to the thyristor exciter 103 of the generator 101 to adjust the voltage appropriately according to the capacity and specifications of the generator 101. Do. For this reason, even if an abnormality occurs in the first normal system automatic voltage regulator 110 and the function is lost, the automatic voltage control of the generator 101 can be continued and the operating rate of the generator 101 is maintained. can do.

As described above, in the generator automatic voltage regulator 2 according to the second embodiment, a plurality of normal automatic voltage regulators and a common standby automatic voltage regulator corresponding to a plurality of generators are provided. The standby automatic voltage regulator stores the voltage adjustment method corresponding to the capacity and specifications of each of the multiple generators, and even if an abnormality occurs in the regular automatic voltage regulator, the corresponding generator The generator voltage adjustment method can be adjusted according to the capacity and specifications, while maintaining the same reliability and operating rate as the conventional dual configuration. Even if they are different, there is an effect that it is possible to provide a low-cost generator automatic voltage regulator with a simple configuration that can be handled.
Further, in the generator automatic voltage regulator 2 according to the second embodiment, compared with the first embodiment, the normal system abnormality detection function is separated from the input / output switch, and the normal system abnormality detector is provided separately. Therefore, there is an effect that the maintainability can be improved.

Embodiment 3 FIG.
The generator automatic voltage regulator according to the third embodiment is obtained by adding a backup priority determination function to the normal system abnormality detector 530 of the generator automatic voltage regulator 2 according to the second embodiment.

  FIG. 3 is an explanatory diagram of a backup priority setting function according to the generator automatic voltage regulator of Embodiment 3, and FIG. 4 is a process flow diagram of the backup priority setting function. In FIG. 3, the same or corresponding parts as those in FIG.

  The difference between the automatic generator voltage regulator according to the third embodiment and the automatic generator voltage regulator 2 according to the second embodiment is that the normal system abnormality detector 530 of the standby automatic voltage regulator 510 determines the backup priority order. Since this function is provided, the necessity and operation of this backup priority determination function will be mainly described.

In the case of a combined power generation facility, for example, a steam turbine generator and a gas turbine generator are provided, and the types and capacities of the turbines are different. Therefore, a plurality of generators have different capacities and specifications. For this reason, priority may be given to generator operation with respect to a plurality of generators.
The normal system abnormality detector 530 of the standby system automatic voltage adjustment device 510 of the second embodiment can receive each abnormality signal from the three normal system automatic voltage adjustment devices 110, 210, 310, but two or three at the same time. When an abnormality occurs in one normal automatic voltage regulator, the standby automatic voltage regulator 510 can back up only one normal automatic voltage regulator.
Therefore, in the unlikely event that a plurality of normal automatic voltage regulators fail at the same time, the priorities of the normal automatic voltage regulators to be backed up in accordance with the operation priority of the generator are set in advance. It is necessary to provide a backup function for a high normal system automatic voltage regulator.

In FIG. 3, the normal system abnormality detector 530 includes a first normal system automatic voltage regulator 110, a second regular system automatic voltage regulator 210, and a third regular system automatic voltage regulator 310. Abnormal information detected by the self-diagnosis function of the voltage regulator is received.
In the normal system abnormality detector 530, the priorities of the three normal system automatic voltage regulators are determined in advance in relation to the corresponding generator. For example, the first regular automatic voltage regulator corresponding to the maximum capacity generator 101 is given priority 1 and the second regular automatic voltage regulator corresponding to the medium capacity generator 201 is given priority 2 and the minimum capacity. The third common-system automatic voltage regulator corresponding to the generator 301 is set to priority 3.
If an abnormality occurs in three normal automatic voltage regulators at the same time, the backup priority is determined, and the first normal automatic voltage regulator 110 corresponding to the generator 101 having the highest priority is determined. Is selected, and the first regular automatic voltage regulator 110 is determined as the regular automatic voltage regulator that is backed up by the standby automatic voltage regulator 510, and this information is stored in the input / output switches 521, 522, and 523 and the digital It is output to the input unit 415.

Next, normal system electric quantity input means for taking in generator voltage / current of a plurality of generators operating in backup parallel as shown in FIG. 4 as electric quantity input signals, and a generator field that is a control output signal to the generator. What is a plurality of normal system automatic voltage regulators having a regular system control output means for generating a magnetic current control command and a regular system digital calculation means for automatically adjusting a generator voltage, and a regular system automatic voltage regulator? Separately, a standby system automatic voltage regulator having a standby system electrical quantity input means, a standby system control output means, and a standby system digital computing means, and a normal system automatic voltage regulator, an abnormality occurs, and a normal system abnormality detector The processing flow of the priority determination function will be described.
When the backup priority order determination process is started (step S1), preset priority order information is extracted in step S2. For example, in the above example, N1 = 110, N2 = 210, and N3 = 310 are set.
Next, in step S3, it is determined whether there are one or more abnormal devices. If there are one or more abnormal devices, the process proceeds to step S4. If no abnormality has occurred, the process ends (step S13).

In step S4, it is determined whether or not there are two or more abnormal devices. If there is one abnormal device, it is not necessary to determine the priority order, so the process proceeds to step S5, and the number of the device in which the abnormality has occurred is specified as the backup target device. The process is terminated as a number (step S13).
If there are two or more abnormal devices, the process proceeds to step S6. The process proceeds to step S6 when there are two or three abnormal devices. In step S6 and subsequent steps, two or three abnormal devices in which an abnormality has occurred are compared with a preset priority order.
In step S6, it is determined whether the first device in which an abnormality has occurred is N1 (110) having the highest priority. If they match, the process proceeds to step S9, and the backup target apparatus number is determined to be N1 (110).

If it is determined in step S6 that the first apparatus in which an abnormality has occurred is not the highest priority N1 (110), the process proceeds to step S7.
In step S7, it is determined whether the second device in which an abnormality has occurred is N1 (110) having the highest priority. If they match, the process proceeds to step S9, and the backup target apparatus number is determined to be N1 (110).
If it is determined in step S7 that the second device in which an abnormality has occurred is not the highest priority N1 (110), the process proceeds to step S8.
In step S8, it is determined whether the third device in which an abnormality has occurred is N1 (110) having the highest priority. If they match, the process proceeds to step S9, and the backup target apparatus number is determined to be N1 (110).

Here, if an abnormality occurs in three devices, the determination in steps S6 to S8 always matches in any step, so the backup target device number is determined in step S9, and the process ends ( Step S13).
In addition, when an abnormality occurs in two devices, and one of them is N1 (110) having the highest priority, it matches in the determination of step S6 to step S7, so the backup target device number is set in step S9. Then, the process is terminated (step S13).
There is a possibility that the determinations in steps S6 to S8 do not coincide with each other when neither of the two devices in which the abnormality has occurred is N1 (110) having the highest priority.

Next, a process when neither of the two devices in which this abnormality has occurred is N1 (110) having the highest priority will be described.
If they do not match in step S8, the process proceeds to step S10.
In step S10, it is determined whether the first device in which an abnormality has occurred is N2 (210) having the second priority. If they match, the process proceeds to S11, the backup target apparatus number is determined as N2 (210), and the process ends (step S13).
If they do not match in step S10, it is uniquely determined that the other device is N2 (210), so the process proceeds to step S12, the backup target device number is determined to be N2 (210), and the process ends. (Step S13).

For example, when the above priorities are set, that is, when N1 = 110, N2 = 210, and N3 = 310, the second normal system automatic voltage regulator 210 and the third normal system automatic are set. A case where abnormality has occurred in the voltage regulator 310 at the same time will be described.
When an abnormality occurs simultaneously in the second normal system automatic voltage regulator 210 and the third regular automatic voltage regulator 310, the standby automatic voltage regulator 510 is connected to the second regular automatic voltage regulator 210 and the second regular automatic voltage regulator 210. Since the abnormal signal is simultaneously received by the normal system automatic voltage regulator 310 of FIG. 3, in the flow chart of FIG. 4, in the determination of steps S6 to S8, the normal system automatic voltage regulator to be backed up is not determined, and step S10 To S12, it is determined that the backup target is the second regular automatic voltage regulator 210.

  In addition, when the standby automatic voltage regulator uses the priority judgment function to back up the low-priority normal automatic voltage regulator, the high-priority regular automatic voltage regulator When an abnormality occurs in the apparatus, the backup target of the standby automatic voltage regulator can be changed to the normal automatic voltage regulator having a higher priority. In this case, the combined power generation facility as a whole can ensure the maximum power generation capacity and perform efficient operation.

  As described above, in the generator automatic voltage regulator according to the third embodiment, the generator automatic voltage regulator 2 according to the second embodiment further includes a plurality of regular automatic voltage regulators in the regular system abnormality detector. A function to set the backup priority in the device and a function to determine the normal automatic voltage regulator to be preferentially backed up when an abnormality occurs in multiple regular automatic voltage regulators at the same time. In addition to having the effect of the automatic generator voltage regulator 2 according to the second embodiment, the standby automatic voltage regulator is given priority to the generator operation even if an abnormality occurs in a plurality of normal automatic voltage regulators at the same time. There is also an effect that it is possible to preferentially back up a specific regular automatic voltage regulator in accordance with the order.

Embodiment 4 FIG.
In the generator automatic voltage regulator of the fourth embodiment, the input / output switch of the generator automatic voltage regulator 2 of the second embodiment is provided with a standby position where input / output can be made offline.

FIG. 5 is an explanatory diagram of a standby position according to the generator automatic voltage regulator of Embodiment 4, and FIG. 6 is a functional explanatory diagram. 5 and 6, the same or corresponding parts as those in FIG. 2 are denoted by the same reference numerals.
In the fourth embodiment, in order to distinguish it from the generator automatic voltage regulator of the second embodiment, in the following description and FIGS. 5 and 6, the standby automatic voltage regulator is 610, the normal system abnormality detector. 630 and input / output switchers 621, 622, and 623.

  The difference between the generator automatic voltage regulator according to the fourth embodiment and the generator automatic voltage regulator 2 according to the second embodiment is that standby positions are provided in the input / output switchers 621, 622, and 623. The necessity and operation of this standby position will be mainly described.

  In the generator automatic voltage regulator 2 of the second embodiment, in addition to the normal system input conversion units 112, 212, and 312 of the regular system automatic voltage regulators 110, 210, and 310, the standby system automatic voltage regulator 510 is on standby. The generator main circuit electric quantity (the generator voltage and current obtained from the voltage detectors 105, 205, 305 and the current detectors 106, 206, 306 in FIG. 2) is also input to the system input conversion unit 412, and the standby system The electrical burden on the was a loss.

In FIG. 5, the input / output switching devices 621, 622, and 623 of the standby system automatic voltage regulator 610 have standby positions. When a switching position command for switching to the standby position is received from the normal system abnormality detector 630, the input / output switching units 621, 622, and 623 switch to the standby position.
Here, in the standby position, in order to prevent burning of the voltage detector and the current detector in the generator main circuit system, the voltage signal line is opened and the current signal line is short-circuited.

  In the normal state, each of the normal system automatic voltage regulators 110, 210, and 310 is in a normal operation, so that the normal system abnormality detector 630 has not received an abnormal signal from any of the regular system automatic voltage regulators. The input / output contacts (positions) of the input / output switchers 621, 622, and 623 of the standby system automatic voltage regulator 610 are positioned at the standby position.

Next, a case where the standby automatic voltage regulator 610 having the input / output switches 621, 622, and 623 having standby positions backs up the normal automatic voltage regulator in which an abnormality has occurred will be described with reference to FIG.
For example, when an abnormality occurs in the first normal automatic voltage regulator 110, the normal abnormality detector 630 detects an abnormality in the first automatic automatic voltage regulator 110, and the input / output switches 621 and 622 are detected. , 623 to switch the input / output contact (position) from the standby position to the normal system automatic voltage regulator 110 position.
If an abnormality occurs in a plurality of regular automatic voltage regulators at the same time, the regular automatic voltage regulator to be preferentially backed up by the backup priority determination function described in the third embodiment is determined and input / output The input / output contacts (positions) of the switching devices 621, 622, and 623 are switched to the positions of the regular automatic voltage regulator.

  In the fourth embodiment, the case has been described where a standby position where input / output can be made offline is provided in the input / output switch of the generator automatic voltage regulator 2 of the second embodiment, but the generators of the first and third embodiments are also described. It is also possible to provide a standby position where the input / output can be made offline in the input / output switch of the automatic voltage regulator.

  As described above, in the generator automatic voltage regulator according to the fourth embodiment, the standby position is provided in the generator automatic voltage regulator 2 according to the second embodiment and in the input / output switch of the standby automatic voltage regulator. Therefore, when the standby system automatic voltage regulator is in a standby state, it is possible to save electric energy without imposing an electric burden. This is effective in preventing burnout of the voltage detector and current detector in the generator main circuit system.

  In the present invention relating to the generator automatic voltage regulator, the embodiments can be appropriately modified and omitted within the scope of the invention.

1, 2, automatic generator voltage regulator, 101, 201, 301 generator,
105, 205, 305 voltage detector, 106, 206, 306 current detector,
110 1st regular system automatic voltage regulator, 111 regular system CPU unit,
112 regular input conversion unit, 113 regular analog conversion unit,
114 service system ignition unit, 210 second service system automatic voltage regulator,
310 third regular automatic voltage regulator,
410, 510, 610 Standby system automatic voltage regulator, 411 Standby system CPU unit,
412 Standby system input conversion unit, 413 Standby system analog conversion unit,
414 Standby system ignition unit, 415 digital input unit,
421,422,423,521,522,523,621,622,623 input / output switch,
530, 630 Regular system abnormality detector.

Claims (4)

Common-system electric quantity input means for taking in the generator voltage and current of each generator of each of a plurality of units operating in parallel as an electric quantity input signal, and the generator field current that is a control output signal to each of the generators A plurality of normal system automatic voltage regulators, comprising a normal system control output means for generating a control command and a normal system digital arithmetic means for automatically adjusting the generator voltage;
In addition to the normal system automatic voltage regulator, standby system electric quantity input means for taking in the generator voltage and current of each generator as an electric quantity input signal, and a generator that is a control output signal to each of the generators One standby system automatic voltage regulator comprising standby system control output means for generating a field current control command and standby system digital arithmetic means for automatically adjusting the generator voltage;
When an abnormality occurs in the normal system automatic voltage regulator, the standby system automatic voltage is detected from the normal system automatic voltage regulator in which the abnormality is detected and the input / output of the electric quantity input signal and the control output signal is abnormal. It has an input / output switch that switches to the adjustment device,
Further, the standby automatic voltage adjusting device has a function of adjusting the voltage of the generator according to the characteristics of the generator to be controlled by the normal automatic voltage adjusting device in which an abnormality has occurred. apparatus. 2. The generator automatic voltage regulator according to claim 1, wherein the input / output switch is provided with a normal system abnormality detector that detects an abnormality of the normal system automatic voltage regulator. 3. The normal system abnormality detector sets a backup priority in advance among a plurality of the normal system automatic voltage regulators, and when an abnormality occurs in a plurality of the normal system automatic voltage regulators at the same time, the backup priority The generator automatic voltage regulator of Claim 2 which has a function which determines the said normal system automatic voltage regulator of backup object based on order | rank. The input / output switch includes a standby position in which the current signal line is in a short circuit state and the voltage signal line is in an open state in a state where the normal system automatic voltage regulator is operating normally. Item 4. The automatic generator voltage regulator according to any one of items 3 to 4.

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