JP2005012938A - Synchronous closing unit in generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a synchronous closing unit of a generator integrating an automatic synchronous closing unit and a manual synchronous closing unit in which the voltage difference and the frequency difference can be manually confined within an allowable value in a short time at the time of automatic synchronous closing and a check synchronization function is prevented from malfunctioning at the time of manual synchronous closing. <P>SOLUTION: The synchronous closing unit of a generator comprises a means for detecting the voltage difference and the frequency difference between a bus and a generator, a regulating means issuing a signal for confining the voltage difference and the frequency difference within an allowable value in response to a command from a means for commanding regulation of the voltage and frequency on an operating panel. Consequently, the voltage difference and the frequency difference can be regulated manually even at the time of manual closing, and a manual synchronous closing button can output a signal only when the voltage difference, the frequency difference and the phase difference fall within an range capable of synchronous closing. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a synchronous input device for supplying a generator such as a diesel generator or a micro gas turbine generator in synchronism with a commercial power source or a generator already in operation, and in particular, automatic synchronous input and manual synchronous input. It is related with the synchronous injection | throwing-in apparatus in the generator which enabled it to carry out by one.
[0002]
[Prior art]
When adding generator power to a bus that is supplied with power from a commercial power source or another generator, the voltage difference and frequency difference between the bus and the newly added generator are within the allowable values, and the phase Must match within a predetermined range. For this reason, various automatic synchronization devices and manual synchronization devices have been proposed that can automatically do this, and automatic synchronization operations can take time, so manual synchronization is required in a short time. There has also been proposed a synchronous input device in which an automatic synchronous input device and a manual synchronous input device are integrated so that the input can be performed.
[0003]
However, the conventional manual synchronizer makes it possible to check the voltage and frequency of the power generator and the newly introduced generator with a voltmeter or frequency meter, and to select the optimal timing while checking the phase matching state with a synchronous tester. However, there are problems such as damage to the generator in the worst case, and this is also the case with a synchronous charging device that integrates an automatic synchronous charging device and a manual synchronous charging device. there were. For this reason, Patent Document 1 automatically controls the voltage difference and the frequency difference to be within a certain value, and automatically synchronizes the circuit breaker that shuts off the bus and the generator when the phase difference reaches the optimum value. It has a circuit and manually controls the voltage difference and frequency difference between the bus and the generator so that they are within a certain value and confirms that the phase is within a specified range. In the synchronous input device that is an integrated automatic synchronous input device and manual synchronous input device, a relay input capable of synchronous input is provided in series with the manual synchronous input switch, and the voltage difference and frequency in the automatic synchronous input circuit are provided. When the voltage difference, frequency difference, and phase difference that can be synchronized are detected by using the difference and phase difference monitoring circuit, the relay contact that can be synchronized is connected. To have a Ekkushinkuro function, thereby being suitable voltage difference, frequency difference, sync-on device which can see manual synchronization turned when the phase difference is shown. Further, in the device of Patent Document 1, since the automatic synchronous closing device fails and the synchronous closing possible relay contact is not closed, a switch is provided in parallel with the synchronous closing possible relay contact and the switch is closed. It also shows that manual synchronization can be performed at any time.
[0004]
[Patent Document 1]
JP-A-5-344656 (FIG. 1)
[0005]
[Problems to be solved by the invention]
However, in the synchronization input device disclosed in Patent Document 1, since the relationship between the automatic synchronization input device and the manual synchronization input device is only the check sync part, for example, at the time of automatic synchronization input, the voltage difference and the frequency difference are manually reduced. It is not possible to make it within the allowable value in time. In addition, a switch is provided in parallel with the synchronous closing enable relay contact because the automatic synchronous closing circuit fails and the synchronous closing possible relay contact is not closed, but if this switch is accidentally left closed When manual synchronization is turned on, the check sync function does not work, and there is a possibility that the generator is damaged in the worst case due to erroneous insertion.
[0006]
Therefore, in the present invention, in the synchronous input device integrating the automatic synchronous input function and the manual synchronous input function, the voltage difference and the frequency difference can be manually set within the allowable values in a short time even during automatic synchronous input. In addition, it is a problem to provide a synchronization input device in a generator that allows a switch operation only when a voltage difference, a frequency difference, and a phase difference can be synchronized when manual synchronization is applied.
[0007]
[Means for Solving the Problems]
Therefore, in the present invention,
A synchronization input device for automatically synchronizing or manually synchronizing generator power via a circuit breaker to a bus that is supplied with power from a commercial power source or another generator,
In order to make the voltage difference and the frequency difference within an allowable value by an instruction from the detection means for detecting a voltage difference and a frequency difference between the bus and the generator, and an instruction from the detection means and the voltage and frequency adjustment instruction means on the operation panel. Adjusting means for emitting a signal of the above, a phase synchronization point confirmation means for detecting that the phase of the bus and the generator coincides within a predetermined range, and a bus indicated by the detection means to the adjusting means when automatic synchronization is selected. The interruption is performed by a signal in which the voltage difference and the frequency difference are within an allowable value due to a signal within which the voltage difference and the frequency difference of the generator are within an allowable value, and a signal in which the phase from the phase synchronization point confirmation unit coincides within a predetermined range. A means for outputting a device input signal, and provided on the operation panel so that signal output is not normally possible. When manual synchronization is selected, the bus and power generation indicated by the voltage and frequency adjustment instruction means on the operation panel are selected. Machine A signal in which the detection means detects that the voltage difference and the frequency difference are within allowable values by a signal that changes the voltage difference and the frequency difference, and a signal in which the phase from the phase synchronization point confirmation means coincides within a predetermined range. It is characterized by comprising circuit breaker manual closing instruction means for enabling the circuit breaker closing signal to be output.
[0008]
By configuring the synchronizer in this way, the adjusting means for generating a signal for keeping the voltage difference and the frequency difference within the allowable values can be changed manually even when the automatic synchronism is applied. Therefore, the voltage difference and the frequency difference can be within the allowable values in a short time. Also, when manual operation is turned on, the manual circuit breaker closing means will manually turn on manually because the voltage difference and frequency difference are within the allowable values, and the circuit breaker closing signal cannot be output if the phase does not match within the predetermined range. Therefore, accidents such as damage to the generator can be prevented.
[0009]
And when selecting manual synchronization input, by locking the signal from the detection means to the adjustment means, for example, when the phase difference is within the allowable range and the phase is synchronized without adjusting the voltage difference, etc. This makes it possible to perform synchronous input more quickly.
[0010]
Further, the circuit breaker manual input instruction means can be switched between display / non-display on the operation panel, and the detection means detects that the voltage difference and the frequency difference are within an allowable value, and the phase synchronization By displaying on the operation panel and outputting the circuit breaker input signal when a signal with the phase from the point confirmation means within a predetermined range is received, the operator can view the meter etc. even during manual synchronization input There is no need to make a judgment and manual synchronization can be performed safely.
[0011]
By configuring the operation panel with a display device that displays each instruction means and a touch panel, it is possible to arbitrarily display / hide various instructions, operation buttons, and the like, making the device easier for the operator to understand. be able to.
[0012]
Further, the communication unit is provided with a communication unit, and when the plurality of generators are connected to the bus by connecting the respective synchronization unit provided corresponding to a plurality of generators by the communication unit, the communication unit is By using the input control, even when a large number of generators are synchronously supplied to the bus, they can be supplied synchronously while checking the input data of each other, and the synchronous input can be performed more safely.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be exemplarily described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention only to those unless otherwise specified. This is just an example.
[0014]
FIG. 1 is a schematic block diagram of a synchronous input device in a generator according to the present invention, FIG. 2 is a flow chart of automatic synchronous input, and FIG. 3 is a schematic block diagram when synchronous input is performed using a plurality of synchronous input devices in the generator of the present invention. It is. In the figure, 1 is a synchronous input device of the present invention, 2 is a commercial power supply, or an input terminal from a bus to which electric power from another generator is supplied, and 3 is electric power from a generator (this device) to be input from now on. The input to these input terminals 2 and 3 is connected to a transformer or the like as necessary, and the input from the bus and the input from the generator may be reversed. The generator is connected to the bus bar via a circuit breaker (not shown). 4 and 5 are analog / digital (A / D) converters that perform analog / digital conversion of the voltage to the input terminals 2 and 3, and 6 is a voltage comparison circuit that compares the voltage of the bus and the generator and outputs a voltage difference, Reference numeral 7 denotes a frequency comparison circuit that compares frequencies and outputs a frequency difference.
[0015]
Reference numeral 8 denotes an operation panel of a synchronization input device composed of a display device using liquid crystal or plasma and a touch panel superimposed on the display device. This operation panel includes an automatic synchronization input button 9 for selecting automatic synchronization input, and manual synchronization. There are provided a manual synchronous closing button 10 for selecting charging, a voltage increasing instruction button 11 for increasing the generator voltage, a voltage decreasing instruction button 12, a frequency increasing instruction button 13, a frequency decreasing instruction button 14, a circuit breaker manual closing button 15, and the like. It has been. Of these, the breaker manual closing button 15 is not always displayed and does not output a signal even when touched, and the signal sent via the knot circuit 34 when the manual synchronization closing button 10 is pressed, and the voltage and frequency. The voltage difference between the generator voltage and the frequency bus adjusted by the operation of the adjustment buttons 11 to 14 and the frequency difference are within the allowable values, and a signal whose phase is matched within a predetermined range is sent to the AND circuit 31. The circuit breaker manual closing button display circuit 32 is displayed, and only when it is displayed, the circuit breaker closing signal is generated by pressing the button. The automatic synchronization input button 9 and the manual synchronization input button 10 are turned on when the automatic synchronization input button 9 is pressed and an ON (1 output) signal is output by the switching circuit 33 and the manual synchronization input button 10 is pressed. Is configured to output an OFF (0 output) signal. In addition, it is obvious that this operation panel may be configured not only using liquid crystal, plasma, or a touch panel, but also using ordinary switches. In this case, the manual circuit breaker button 15 is displayed. However, it is only necessary to prevent the output by operating the button until the synchronization can be made.
[0016]
16 and 17 are interlock circuits that lock the outputs of the voltage comparison circuit 6 and the frequency comparison circuit 7 when the manual synchronization input button 10 is pressed, and 18 is a voltage difference signal from the voltage comparison circuit 6 and a manual voltage increase. And a voltage forced correction signal generating circuit for generating a signal for forcibly correcting the voltage of the generator by a voltage adjustment signal from the descending buttons 11 and 12, and the voltage forced correction signal generating circuit 18 includes a voltage forced correction signal. When the generator does not reach the specified voltage after a certain period of time has elapsed, a watch timer for informing the abnormality may be incorporated. 19 is a frequency forcible correction signal generation for generating a signal for forcibly correcting the frequency of the generator by the frequency difference signal from the frequency comparison circuit 7 and the frequency adjustment signal from the manual frequency increase and decrease buttons 13 and 14. In the circuit, the frequency forced correction signal generating circuit 19 is also informed of an abnormality if the frequency does not reach the specified frequency when a frequency forcible correction signal is generated and a predetermined time elapses as in the voltage forced correction signal generating circuit 18. A watch timer may be incorporated. Reference numerals 20 and 21 denote a voltage increase signal and a decrease signal output from the voltage forcible correction signal generation circuit 18, and the output current is adjusted by adjusting the excitation current of the generator and the like based on these signals. Reference numerals 22 and 23 denote an increase signal and a decrease signal of the frequency output from the frequency forced correction signal generation circuit 19, which adjust the governor of the engine that drives the generator by this signal and adjust the rotation speed to output the generator. Adjust the frequency.
[0017]
Reference numeral 24 denotes a phase / synchronization point confirmation circuit that detects a phase difference between the bus and the generator and generates a phase synchronization signal when the phases coincide with each other within a predetermined range, and 25 denotes a malfunction immediately after turning on the power of the synchronization input device 1. A malfunction prevention lock circuit for locking the AND circuit 26 in order to prevent reverse power, 27 is a circuit breaker closing signal 28 is output, the signal that the circuit breaker has been switched on does not return even after a certain period of time Is a watch timer and counter that outputs a misscross (breaker is not turned on) signal, 29 is a voltage display device that displays the bus voltage and generator voltage detected by the voltage comparison circuit 6, and 30 is also detected by the frequency comparison circuit 7 The frequency display device displays the generated bus frequency and generator frequency. The voltage display device 29 and the frequency display device 30 are either in a meter format or a digital display format. Good. In FIG. 3, 50 is a commercial power bus, 51 and 52 are PTs (transformers), 53 is a generator bus, and 54 is a communication provided in each of the synchronizers 1 ₀ , 1 ₁ , 1 ₂ , 1 ₃ ,. A cable connecting the means, 55 is a circuit breaker, G ₁ , G ₂ , G ₃ ,... Are generators.
[0018]
Next, the operation of the synchronizing device 1 will be described. When the power of the synchronizing device 1 is turned on, the malfunction prevention circuit 25 locks the AND circuit 26 for a certain period of time in order to avoid an initial malfunction. When it disappears, the lock is released. When the power of the generator is synchronously input to the bus by automatic control, the synchronous input is performed according to the procedure shown in the flow of FIG. That is, first, in step S10, when the automatic synchronization input button 9 on the operation panel 8 is pressed, the voltage of the bus sent to the input terminals 2 and 3 in step S11 and the voltage of the generator (this machine) to be supplied to the bus. Are compared by the voltage comparison circuit 6 and displayed on the voltage display device 29, and it is determined in step S12 whether the voltage difference is within an allowable range. If it is not within the allowable range, the process proceeds to step S13, and the voltage difference is sent to the voltage forced correction signal generation circuit 18 through the interlock circuit 16. Therefore, the voltage forcible correction signal generation circuit 18 sends the voltage increase signal 20 or the voltage decrease signal 21 to the power supply circuit (not shown) of the generator so that the transmitted voltage difference falls within the allowable range, thereby exciting the generator. Increase or decrease the current to adjust the output voltage.
[0019]
When the voltage difference is adjusted in this way and it is determined that it is within the permissible range in step S12, the process proceeds to the next step S14. 7 and displayed on the frequency display device 30, and in step S15, it is determined whether or not the frequency difference is within an allowable range. If it is not within the allowable range, the process proceeds to step S16, and this frequency difference is sent to the frequency forced correction signal generation circuit 19 through the interlock circuit 17. Therefore, the frequency forcible correction signal generation circuit 19 sends the frequency increase signal 22 or the decrease signal 23 to the governor of the engine driving the generator (not shown) so that the transmitted frequency difference falls within the allowable range. Adjust and adjust the frequency.
[0020]
In this way, the frequency difference is adjusted, and when it is determined in step S15 that it is within the allowable range, signals are sent from the voltage comparison circuit 6 and the frequency comparison circuit 7 to the AND circuit 26. Then, in step S17, the phase / synchronization point confirmation circuit 24 monitors the phases of the bus and the generator, and determines whether or not both phases are within an allowable range necessary for synchronous input. If it is not within the allowable range, the process returns to step S11 and the same operation is repeated. If it is within the allowable range, a signal is sent to the AND circuit 26. Therefore, the AND circuit 26 includes a lock release signal from the malfunction prevention lock circuit 25, a signal from the automatic synchronization input button 9 on the operation panel, a signal from the voltage comparison circuit 6 and the frequency comparison circuit 7, and a phase / synchronization point. Since the signal from the confirmation circuit 24 is sent, this gate is opened in step S18, and the breaker closing signal 28 of the generator is sent to the breaker (not shown) through the watch timer and the counter circuit 27. In the next step S19, the watch timer and the counter circuit 27 are updated, and it is determined whether or not a predetermined time has passed in the next step S20. If not, it is determined whether or not a circuit breaker closing completion signal has been received in the next step S21. If a completion signal has been received, the automatic synchronous closing is completed and the process proceeds to step S23, and no completion signal has been received. Returns to step S19. In this case, if a completion signal does not come even after a predetermined time in step S20, the process proceeds to step S22 to display that the synchronization input is abnormal (miscross) and to end.
[0021]
On the other hand, when manually applying synchronization, when the manual synchronization input button 10 on the operation panel 8 is pressed, an OFF (0 output) signal is output by the switching circuit 33, and the interlock circuits 16, 17, and AND circuit 26 are output. The voltage difference and the frequency difference between the bus and the generator inserted into the bus detected by the voltage comparison circuit 6 and the frequency comparison circuit 7 are sent to the voltage forced correction signal generation circuit 18 and the frequency forced correction signal generation circuit 19. The AND circuit 26 is locked, and an ON (1 signal) signal is sent to the AND circuit 31 through the knot circuit 34. As described above, the bus voltage and the generator voltage detected by the voltage comparison circuit 6 are displayed on the voltage display device 29, and the bus frequency and the generator frequency detected by the frequency comparison circuit 7 are displayed on the frequency display device 30. Therefore, the operator sees the voltage increase instruction button 11, voltage drop instruction button 12, frequency increase instruction button 13, and frequency decrease instruction button 14 on the operation panel, so that the voltage difference and the frequency difference are within the allowable values. Operate as follows. Then, the signal output from each button is sent to the voltage forced correction signal generation circuit 18 and the frequency forced correction signal generation circuit 19, and the voltage forced correction signal generation circuit 18 and the frequency forced correction signal generation circuit 19 are sent. The voltage increase signal 20 or the voltage decrease signal 21 is sent to a power supply circuit (not shown) of the generator in accordance with the instruction, and the output voltage is adjusted by increasing or decreasing the excitation current of the generator, and the frequency increase signal 22 or the decrease signal 23 is sent to the governor of the engine that drives the generator to adjust the speed and the frequency.
[0022]
Then, the voltage difference and the frequency difference are monitored by the voltage comparison circuit 6 and the frequency comparison circuit 7, and when these voltage difference and the frequency difference fall within the allowable range necessary for synchronous input, signals from the voltage comparison circuit 6 and the frequency comparison circuit 7 are transmitted. It is sent to the AND circuit 31. On the other hand, the phase / synchronization point confirmation circuit 24 monitors the phases of the bus and the generator during this period, and also sends a signal to the AND circuit 31 when both phases fall within an allowable range necessary for synchronous input. For this reason, the AND circuit 31 sends one signal through the knot circuit 34 when the manual synchronization input button 10 is pressed, a signal from the voltage comparison circuit 6 and the frequency comparison circuit 7, and a signal from the phase / synchronization point confirmation circuit 24. The circuit breaker manual closing button display control circuit 3 displays the circuit breaker manual closing button 15 on the operation panel 8 so that a signal can be output when the circuit breaker manual closing button 15 is pressed at the same time. Is done. Therefore, when the operator presses the manual circuit breaker button 15, a circuit breaker closing signal 28 is sent through a watch timer and a counter circuit 27, the circuit breaker (not shown) is closed and the power of the generator is turned on to the bus. . At this time, the watch timer and the counter circuit 27 measure the time from when the circuit breaker is turned on, and if the circuit breaker is not turned on within a certain time, an indication that the synchronous turn is abnormal (miscross) is displayed. And exit.
[0023]
The above is the outline of the operation of the synchronous charging device in the generator according to the present invention. In the above description, the automatic synchronous charging is described without using an operator at all. In the device, even when automatic synchronization is applied, the voltage increase instruction button 11, the voltage decrease instruction button 12, the frequency increase instruction button 13, and the frequency decrease instruction button 14 are manually operated to forcibly correct voltage signal generation circuit 18 and frequency compensatory correction. By sending to the signal generation circuit 19, these manually designated voltage and frequency are added to the voltage difference and frequency difference signals sent from the voltage comparison circuit 6 and frequency comparison circuit 7, so that automatic synchronization can be achieved in a short time. When it is desired to input the voltage and frequency, the adjustment of the voltage and the frequency can be accelerated manually while viewing the display on the voltage display device 29 and the frequency display device 30.
[0024]
Moreover, in the above description, the case where one synchronous input device according to the present invention is synchronously input to a place where power from a bus or another generator is supplied has been described as an example. In the case where the power is input to the bus, the synchronous input device of the present invention can be used. In Figure 3 that shows an example of this case, each generator G ₁ is the example of FIG. _3, G 2, _{G 3,} synchronous feeding device 1 ₁ of each invention in _......, 1 _2, 1 _3, the ...... provided, and these synchronization dosing device _{1 1,} 1 2, _{1 3,} provided with a synchronous-on device _{1 0} that comprehensively controls the ...., all synchronous dosing device _{1 0,} 1 1, _{1 2} , _{1 3,} ... Conclusion a communication cable 54 provided with a communication means, such as RS-485, synchronous feeding device by the synchronous insertion device _{1 0} that comprehensively controls _{1 1,} 1 2, _{1 3,} can be integrally controls ...... It is what I did.
[0025]
In this case, each synchronization dosing device _{1 1,} 1 2, _{1 3,} synchronous feeding device _{1 0} that comprehensively controls the ...... is obtained voltage of the bus 50, the data of the frequency via the PT (transformer) 51, PT The voltage and frequency data of the generator-side bus 53 are obtained via the (transformer) 52. Then, these data are transmitted to each of the synchronous input devices 1 ₁ , 1 ₂ , 1 ₃ ,... Via a communication cable 54 that connects communication means such as RS-485. Then, each of the synchronizers 1 ₁ , 1 ₂ , 1 ₃ ,... Is based on this information, and the voltage at the bus 50 and the generators G ₁ , G ₂ , G ₃ ,. Then, the circuit breakers 55 ₁ , 55 ₂ , 55 ₃ ,... Therefore, the generator-side bus 53 is supplied with the power of the generators G ₁ , G ₂ , G ₃ ,... Whose voltage, frequency, and phase are within the allowable ranges from the bus 50. breaker _{55 1,} 55 2, 55 _3, after ...... is turned on, connecting the line 53 of the synchronous feeding device _{1 0} and bus 50 by introducing a breaker 55 ₀ generator side, the synchronization is turned on Complete.
[0026]
In this way, even when a plurality of generators are synchronously turned on to the bus 50, it is possible to perform control in exactly the same manner as when a single generator is synchronously turned on. It can be carried out.
[0027]
As described above, according to the present invention, the detection means for detecting the voltage difference and the frequency difference between the bus and the generator, the detection means, and the instructions from the voltage and frequency adjustment instruction means on the operation panel are used. By providing an adjusting means for generating a signal for setting the voltage difference and the frequency difference within the allowable value, the adjusting means for generating a signal for setting the voltage difference and the frequency difference within the allowable value is However, since the manual adjustment signal for the voltage difference and the frequency difference can be changed, the voltage difference and the frequency difference can be within the allowable values in a short time. When manual synchronization is turned on, it is provided on the operation panel so that signal output is always disabled.When manual synchronization is selected, the bus and generator specified by the voltage and frequency adjustment instruction means on the operation panel are selected. A signal in which the detection means detects that the voltage difference and the frequency difference are within allowable values by a signal that changes the voltage difference and the frequency difference, and a signal in which the phase from the phase synchronization point confirmation means coincides within a predetermined range. By providing the circuit breaker manual closing instruction means that enables the circuit breaker closing signal output, the manual circuit breaker closing means has a voltage difference and a frequency difference within an allowable value, and the phase is predetermined. If they do not match within the range, the circuit breaker closing signal cannot be output, so there is no accidental manual switching on, thereby preventing accidents such as damaging the generator.
[0028]
And when selecting manual synchronization input, by locking the signal from the detection means to the adjustment means, for example, when the phase difference is within the allowable range and the phase is synchronized without adjusting the voltage difference, etc. This makes it possible to perform synchronous input more quickly.
[0029]
Further, the circuit breaker manual input instruction means can be switched between display / non-display on the operation panel, and the detection means detects that the voltage difference and the frequency difference are within an allowable value, and the phase synchronization By displaying on the operation panel and outputting the circuit breaker input signal when a signal with the phase from the point confirmation means within a predetermined range is received, the operator can view the meter etc. even during manual synchronization input There is no need to make a judgment and manual synchronization can be performed safely.
[0030]
By configuring the operation panel with a display device that displays each instruction means and a touch panel, it is possible to arbitrarily display / hide various instructions, operation buttons, and the like, making the device easier for the operator to understand. be able to.
[0031]
Further, the communication unit is provided with a communication unit, and when the plurality of generators are connected to the bus by connecting the respective synchronization unit provided corresponding to a plurality of generators by the communication unit, the communication unit is By using the input control, even when a large number of generators are synchronously supplied to the bus, they can be supplied synchronously while checking the input data of each other, and the synchronous input can be performed more safely.
[0032]
【The invention's effect】
As described above, according to the present invention, the adjusting means for generating a signal for keeping the voltage difference and the frequency difference within the allowable values can change the manual adjustment signal for the voltage difference and the frequency difference even when automatic synchronization is applied. The voltage difference and the frequency difference can be within the allowable values in a short time. Also, when manual operation is turned on, the manual circuit breaker closing means will manually turn on manually because the voltage difference and frequency difference are within the allowable values, and the circuit breaker closing signal cannot be output if the phase does not match within the predetermined range. Therefore, accidents such as damage to the generator can be prevented.
[Brief description of the drawings]
FIG. 1 is a schematic block diagram of a synchronous input device in a generator according to the present invention.
FIG. 2 is a flow chart of automatic synchronous charging in the synchronous charging device in the generator of the present invention.
FIG. 3 is a schematic block diagram when using a plurality of synchronous input devices in the generator of the present invention for synchronous input.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Synchronizing device 2 Input terminal from bus 3 Input terminal 4 from generator 4, 5 Analog / digital converter 6 Voltage comparison circuit 7 Frequency comparison circuit 8 Operation panel 9 Automatic synchronization input button 10 Manual synchronization input button 11 Voltage increase instruction Button 12 Voltage drop instruction button 13 Frequency increase instruction button 14 Frequency drop instruction button 15 Circuit breaker manual closing button 16, 17 Interlock circuit 18 Voltage forced correction signal generation circuit 19 Frequency forced correction signal generation circuit 20 Voltage increase signal 21 Voltage drop signal 22 Frequency increase signal 23 Frequency decrease signal 24 Phase / synchronization point confirmation circuit 25 Malfunction prevention lock circuit 26 AND circuit 27 Watch-out timer and counter 28 Circuit breaker input signal 29 Voltage display device 30 Frequency display device 31 AND circuit 32 Circuit breaker manual input button Display control circuit 33 switching times Road 34 knot circuit

Claims (5)

A synchronization input device for automatically synchronizing or manually synchronizing generator power via a circuit breaker to a bus that is supplied with power from a commercial power source or another generator,
In order to make the voltage difference and the frequency difference within an allowable value by an instruction from the detection means for detecting a voltage difference and a frequency difference between the bus and the generator, and an instruction from the detection means and the voltage and frequency adjustment instruction means on the operation panel. Adjusting means for emitting a signal of the above, a phase synchronization point confirmation means for detecting that the phase of the bus and the generator coincides within a predetermined range, and a bus indicated by the detection means to the adjusting means when automatic synchronization is selected. The interruption is performed by a signal in which the voltage difference and the frequency difference are within an allowable value due to a signal within which the voltage difference and the frequency difference of the generator are within an allowable value, and a signal in which the phase from the phase synchronization point confirmation unit coincides within a predetermined range. A means for outputting a device input signal, and provided on the operation panel so that signal output is not normally possible. When manual synchronization is selected, the bus and power generation indicated by the voltage and frequency adjustment instruction means on the operation panel are selected. Machine A signal in which the detection means detects that the voltage difference and the frequency difference are within allowable values by a signal that changes the voltage difference and the frequency difference, and a signal in which the phase from the phase synchronization point confirmation means coincides within a predetermined range. And a circuit breaker manual turn-on instruction means that enables the circuit breaker turn-on signal to be output. 2. The generator according to claim 1, further comprising means for locking a signal from the detection unit to the adjustment unit when the manual synchronization input is selected. The circuit breaker manual input instruction means can be switched between display and non-display on the operation panel, and the detection means detects that the voltage difference and the frequency difference are within allowable values, and the phase synchronization point confirmation 2. A synchronous closing device for a generator according to claim 1, wherein when a signal having a phase in phase within a predetermined range is received, the signal is displayed on an operation panel and the breaker closing signal can be output. . The synchronous operation device in the generator according to claim 1, wherein the operation panel includes a display device that displays each instruction unit and a touch panel. The communication unit is provided with a communication unit, and when the plurality of generators are connected to the bus by connecting the respective synchronization unit provided corresponding to a plurality of generators by the communication unit, the communication unit is used. The synchronous charging device in the generator according to claim 1, wherein the charging control is performed.

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