CN211405905U - Generator start-stop control device capable of automatically regulating voltage - Google Patents
Generator start-stop control device capable of automatically regulating voltage Download PDFInfo
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- CN211405905U CN211405905U CN202020499977.3U CN202020499977U CN211405905U CN 211405905 U CN211405905 U CN 211405905U CN 202020499977 U CN202020499977 U CN 202020499977U CN 211405905 U CN211405905 U CN 211405905U
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Abstract
The utility model discloses a generator start-stop control device capable of automatically regulating voltage, which comprises a PLC controller, an I/O interface module, an output execution circuit, a power supply unit, an HMI display screen and a three-phase electric power sensor; the PLC is connected with the generator through an output execution circuit to realize the start-stop control of the generator, and acquires the fault or alarm signal of the generator through an I/O interface module; the three-phase electric power sensor is connected with the output end of the generator to acquire output voltage, frequency, current and power parameters of the generator; the three-phase electric power sensor is connected with the PLC through the CAN communication bus, collected parameter signals are transmitted back to the PLC, and the PLC automatically adjusts and modulates the voltage and frequency of the generator according to the collected parameter signals; the utility model has the functions of automatic starting, automatic pressure regulation, automatic frequency modulation, automatic switch switching, automatic shutdown and the like; the running condition of the generator in the running process can be monitored in real time, and automatic control is realized.
Description
Technical Field
The utility model relates to an automatic control field especially relates to a but generator of automatic voltage regulation opens and stops controlling means.
Background
The starting and stopping processes of the old generator need to be manually controlled according to the operation process due to the technical condition limitation at the time, and the current environment temperature also needs to be measured in the operation process so as to correspond to different operation processes. The current operation condition can not be monitored in real time in the operation process, particularly, the output voltage, frequency, current and power of the generator can be abnormal when an external power supply is powered off, the cost for judging and automatically controlling the operation state of the generator by the conventional control device is high, the conventional control device is not suitable for an old generator, the structure for realizing stable voltage regulation and frequency regulation of the generator is very complicated, the stability and the reliability are low, early warning can not be timely realized when slight faults occur, and the generator can not be stopped in time when serious faults occur.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a generator start-stop control device capable of automatically regulating voltage aiming at the defects of the prior art, which comprises a PLC controller, an I/O interface module, an output execution circuit, a power supply unit, an HMI display screen and a three-phase electric power sensor; the PLC is connected with the generator through an output execution circuit to realize the start-stop control of the generator, and acquires the fault or alarm signal of the generator through an I/O interface module; the three-phase electric power sensor is connected with the output end of the generator to acquire output voltage, frequency, current and power parameters of the generator; the three-phase electric power sensor is connected with the PLC through the CAN communication bus, collected parameter signals are transmitted back to the PLC, and the PLC carries out automatic voltage regulation and frequency modulation on the generator according to the collected parameter signals.
Further, the power supply unit comprises a power supply change-over switch, a power supply control module and a standby battery pack; the power supply change-over switch is connected with an external power supply through the power supply control module, and the other end of the power supply change-over switch is connected with the PLC and provides a working power supply for the PLC.
Furthermore, the power supply change-over switch is connected with the standby battery pack, and the power supply control module sends a power supply change-over control signal to the power supply change-over switch to realize the automatic power supply change-over between the external power supply and the standby battery pack.
Furthermore, the output execution circuit comprises a relay expansion board, and the control output end of the PLC controller is connected to a generator control button through the relay expansion board in parallel to realize the start and stop, voltage regulation and frequency modulation control of the generator.
Further, the PLC is connected with the HMI display screen, sends generator faults or alarm signals and parameter signals to the HMI display screen, and receives control signals input by the HMI display screen.
The utility model has the advantages that: the utility model has the functions of automatic start, automatic pressure regulation, automatic frequency modulation, automatic switch switching, automatic shutdown and the like when the commercial power is suddenly cut off; the running condition of the generator in the running process can be monitored in real time, automatic control is realized, the dependence on operators is greatly reduced, and the automatic control cost of the old generator is reduced.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings.
As shown in fig. 1, the generator start-stop control device capable of automatically regulating voltage comprises a PLC controller, an I/O interface module, an output execution circuit, a power supply unit, an HMI display screen, and a three-phase power sensor; the PLC is connected with the generator through an output execution circuit to realize the start-stop control of the generator, and acquires the fault or alarm signal of the generator through an I/O interface module; the three-phase electric power sensor is connected with the output end of the generator to acquire output voltage, frequency, current and power parameters of the generator set; the three-phase electric power sensor is connected with the PLC through the CAN communication bus, collected parameter signals are transmitted back to the PLC, and the PLC carries out automatic voltage regulation and frequency modulation on the generator according to the collected parameter signals.
The power supply unit comprises a power supply change-over switch, a power supply control module and a standby battery pack; the power supply change-over switch is connected with an external power supply through the power supply control module, and the other end of the power supply change-over switch is connected with the PLC and provides a working power supply for the PLC.
The power supply changeover switch is bidirectionally connected with the standby battery pack, when the external power supply is electrified, the external power supply charges the standby battery pack and supplies power to the PLC, and when the external power supply is powered off, the standby battery pack supplies power to the PLC so as to ensure that the whole device is not influenced by the power failure condition; the power supply control module is used for sending a power supply switching control signal to the power supply switching switch to realize the automatic switching of the power supply between the external power supply and the standby battery pack.
When the external power supply is powered off, the power supply control module controls the power supply to switch on and switch to the standby battery pack for supplying power, and meanwhile, the PLC starts to execute the action of starting the generator; when the external power supply recovers the power supply, the power supply control module controls the power supply to switch on the light to supply power to the external power supply and charge the standby battery pack, and meanwhile, the PLC executes the shutdown action of the generator.
The output execution circuit comprises a relay expansion board, and the control output end of the PLC controller is connected to a generator control button in parallel through the relay expansion board to realize the start-stop, voltage regulation and frequency modulation control of the generator; and the analog quantity input end and the signal input end of the PLC are respectively connected to the generator fault or alarm signal output end through the I/O interface module, and the generator fault or alarm signal is displayed through an HMI display screen connected with the PLC.
The PLC sends output voltage, frequency, current and power parameter signals of the generator collected by the three-phase electric power sensor and generator faults or alarm signals read by the I/O interface module to the HMI display screen and receives control signals input by the HMI display screen, wherein the HMI display screen can manually operate through an operation interface to control the generator to work. The PLC reads the sensor signal, judges the working state of the generator according to the signal, and carries out emergency shutdown of the generator by combining the working state of the generator and a fault or alarm signal so as to ensure the reliable operation of the generator; when the output voltage, frequency, current and power parameter signals of the generator collected by the three-phase electric power sensor are abnormal, the working states of the generator such as the output voltage, the frequency, the current and the power are poor, the PLC judges the working state of the generator according to the parameter signals, controls a control button of the generator through the output execution circuit, adjusts the output of the generator and enables the generator to recover the normal working state.
In the embodiment, the original state of the generator can be accurately read, and the original manual control system of the generator can be ensured to normally operate without being influenced by a PLC control system; and the PLC controller can judge whether the instruction is sent by a manual system or an automatic system according to the read signal, so that the respective actions of the manual mode and the automatic mode are realized without being influenced.
The generator start-stop control device can be externally provided with a change-over switch for switching off the control output of the PLC, so that complete manual control is realized.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. A generator start-stop control device capable of automatically regulating voltage is characterized by comprising a PLC (programmable logic controller), an I/O (input/output) interface module, an output execution circuit, a power supply unit, an HMI (human machine interface) display screen and a three-phase electric power sensor; the PLC is connected with the generator through an output execution circuit to realize the start-stop control of the generator, and acquires the fault or alarm signal of the generator through an I/O interface module; the three-phase electric power sensor is connected with the output end of the generator to acquire output voltage, frequency, current and power parameters of the generator; the three-phase electric power sensor is connected with the PLC through the CAN communication bus, collected parameter signals are transmitted back to the PLC, and the PLC carries out automatic voltage regulation and frequency modulation on the generator according to the collected parameter signals.
2. The automatic voltage-regulating generator start-stop control device is characterized in that the power supply unit comprises a power supply change-over switch, a power supply control module and a standby battery pack; the power supply change-over switch is connected with an external power supply through the power supply control module, and the other end of the power supply change-over switch is connected with the PLC and provides a working power supply for the PLC.
3. The automatic voltage regulation generator start-stop control device as claimed in claim 2, wherein the power supply changeover switch is connected to the backup battery pack, and the power supply control module sends a power supply changeover control signal to the power supply changeover switch to realize automatic power supply changeover between the external power supply and the backup battery pack.
4. The generator start-stop control device capable of automatically regulating voltage according to claim 1, wherein the output execution circuit comprises a relay expansion board, and the control output end of the PLC controller is connected to a generator control button through the relay expansion board in parallel to realize the start-stop, voltage regulation and frequency regulation control of the generator.
5. The generator starting and stopping control device capable of automatically regulating voltage according to claim 1, wherein the PLC is connected with an HMI display screen, sends generator set faults or alarm signals and parameter signals to the HMI display screen, and receives control signals input by the HMI display screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020499977.3U CN211405905U (en) | 2020-04-08 | 2020-04-08 | Generator start-stop control device capable of automatically regulating voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020499977.3U CN211405905U (en) | 2020-04-08 | 2020-04-08 | Generator start-stop control device capable of automatically regulating voltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211405905U true CN211405905U (en) | 2020-09-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020499977.3U Active CN211405905U (en) | 2020-04-08 | 2020-04-08 | Generator start-stop control device capable of automatically regulating voltage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211405905U (en) |
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2020
- 2020-04-08 CN CN202020499977.3U patent/CN211405905U/en active Active
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