CN211698650U - Power distribution cabinet control system - Google Patents
Power distribution cabinet control system Download PDFInfo
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- CN211698650U CN211698650U CN201922500771.8U CN201922500771U CN211698650U CN 211698650 U CN211698650 U CN 211698650U CN 201922500771 U CN201922500771 U CN 201922500771U CN 211698650 U CN211698650 U CN 211698650U
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Abstract
The utility model discloses a power distribution cabinet control system, which comprises a signal input circuit, a voltage and current detection circuit, an AC/DC conversion circuit, a main controller, an overcurrent and overvoltage protection circuit and a voltage and current monitoring module; the signal input circuit inputs a voltage current signal to the voltage current detection circuit, and the voltage current detection circuit transmits the detected voltage current signal to the main controller through an AC/DC conversion circuit; the main controller respectively controls the overcurrent and overvoltage protection circuit and the voltage and current monitoring module; the voltage and current detection circuit inputs a voltage and current signal to the pulse width modulation signal circuit through capturing phase-locked current through a zero-crossing comparison circuit; the pulse width modulation signal circuit transmits signals to the AC/DC conversion circuit through a direct current side single chip microcomputer. The utility model provides a not only detect voltage electric current stable, accurate, monitoring function is various, has improved the switch board control system who produces the product performance.
Description
Technical Field
The utility model relates to a switch board control technology field especially relates to a switch board control system.
Background
The supply of electric power plays an important role in the normal production and operation of the society. The traditional low-voltage distribution control mode mainly realizes the functions of distribution, control, protection, monitoring and the like through a low-voltage switch control cabinet which is formed by combining a circuit breaker, a contactor, a thermal relay, a fuse protector, a control relay, various transformers and various electrical instruments. The state of the traditional power distribution cabinet to the power system cannot be well monitored in real time, manual direct operation is mainly used, intelligent management of a computer cannot be realized, and complex control logic is difficult to realize.
With the development of modern industry, the requirements on the automation and the intelligent degree of electrical equipment control are higher and higher, and the monitoring, protection, control and power measurement of electrical equipment under normal and accident conditions are integrated with a factory distributed control system by utilizing modern electronic technology, sensor technology, communication technology, computer and network technology, so that high-level and high-transparency good management is achieved, and the method becomes a necessary trend and development direction. However, the current intelligent power distribution cabinet control system is unstable in voltage and current detection, not accurate enough in voltage and current detection, single in monitoring means and incapable of meeting market demands.
The Chinese patent application numbers are: 201820833590.X, the application date is 31.05.2018, and the publication date is: year 2019, month 01, and title: be applied to intelligent temperature controller and temperature monitoring system of switch board temperature control, disclose an intelligent temperature controller and temperature monitoring system for switch board temperature control. The main control module comprises a second main control chip, and a second Ethernet communication module, a second carrier communication module and a second serial port communication module which are respectively connected with the second main control chip in a bidirectional way; the direct current quantity detection circuit, the linear optocoupler and the first main control chip of the submodule are connected, the metering module is connected with the first main control chip, the photoelectric isolation circuit, the level conversion circuit and the first main control chip are sequentially connected, the first main control chip is connected with the relay, and the first main control chip is respectively connected with the first Ethernet communication module, the first carrier communication module and the first serial port communication module; the second carrier communication module of the main control module is connected with the first carrier communication module of the sub-module through a power line. This novel possess measurement function, whether the threshold value that can also judge temperature control is reasonable to carry out remote control.
Although the above patent document discloses a control system for a power distribution cabinet, the system detects unstable voltage and current, resulting in inaccurate detection and incomplete functions, and cannot meet the requirements of consumers.
Disclosure of Invention
The utility model aims at overcoming the not enough of prior art, provide one kind and not only detect voltage electric current stable, accurate, monitoring function is various, has improved the switch board control system who produces the product performance.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
a power distribution cabinet control system comprises a signal input circuit, a voltage and current detection circuit, an AC/DC conversion circuit, a main controller, an overcurrent and overvoltage protection circuit and a voltage and current monitoring module; the signal input circuit is used for inputting voltage and current signals; the voltage and current detection circuit is used for detecting the frequency and the phase of the alternating voltage of the input circuit; the AC/DC conversion circuit is used for converting an analog signal into a digital signal; the main controller is used for controlling and analyzing signal information; the voltage and current monitoring module is used for monitoring the voltage and current information of the power distribution cabinet;
the signal input circuit inputs a voltage current signal to the voltage current detection circuit, and the voltage current detection circuit transmits the detected voltage current signal to the main controller through the AC/DC conversion circuit; the main controller respectively controls the overcurrent and overvoltage protection circuit and the voltage and current monitoring module;
the voltage and current detection circuit comprises a zero-crossing comparison circuit, a phase-locked current capturing circuit, a pulse width modulation signal circuit and a direct-current side single chip microcomputer; the zero-crossing comparison circuit is used for converting an analog signal into a digital signal, the capture phase-locked circuit is used for capturing and locking a direct-current signal of the zero-crossing comparison circuit, the pulse width modulation signal is used for modulating a signal, and the direct-current side single chip microcomputer is used for converting the direct-current signal into an alternating-current signal;
the zero-crossing comparison circuit inputs a voltage current signal to the pulse width modulation signal circuit through capturing phase-locked current; the pulse width modulation signal circuit transmits signals to the AC/DC conversion circuit through a direct current side single chip microcomputer.
In one embodiment, the main controller is a chip with model number UC 3846.
In one embodiment, the voltage and current detection circuit further comprises a sampling circuit, an alternating current side single chip microcomputer and a filter circuit; the sampling circuit samples the input alternating current signal, converts the alternating current signal into a direct current signal through the alternating current side single chip microcomputer, and inputs the direct current signal into the direct current side single chip microcomputer through the filter circuit.
In one embodiment, the main controller comprises a leakage protection circuit, and the main controller inputs a control signal to the leakage protection circuit through a relay.
In one embodiment, the voltage and current monitoring module includes a data transmission module, and the data transmission module is used for transmitting the monitored signal.
In one embodiment, the voltage and current monitoring module comprises an alarm module, and the alarm module is used for alarming voltage and current overload.
In one embodiment, the voltage and current monitoring module comprises a voltage and current metering module for metering voltage and current.
The utility model has the advantages that: 1. the utility model detects the voltage and the current through the voltage and current detection circuit, thereby not only stabilizing the voltage and the current, but also leading the input signal to be more reliable, leading the voltage and the current to be more accurate and leading the use to be more convenient; 2. the utility model has complete functions, various monitoring means, high safety and strong reliability; 3. the utility model discloses improve the performance of product greatly, can make control system miniaturized, greatly reduced the cost.
Drawings
Fig. 1 is a block diagram of a control system of a power distribution cabinet according to an embodiment of the present invention;
fig. 2 the embodiment of the utility model provides a switch board control system's voltage current detection circuit's circuit block diagram.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 and 2, the power distribution cabinet control system includes a signal input circuit 1, a voltage and current detection circuit 2, an AC/DC conversion circuit 3, a main controller 4, an overcurrent and overvoltage protection circuit 5, and a voltage and current monitoring module 7; the signal input circuit 1 is used for inputting a voltage current signal, and the signal input by the signal input circuit 1 can be a direct current signal or an alternating current signal;
the voltage and current detection circuit 2 is used for detecting the frequency and the phase of the alternating voltage of the input circuit; the AC/DC conversion circuit 3 is used for converting an analog signal into a digital signal; the main controller 4 is used for controlling and analyzing signal information; the voltage and current monitoring module 7 is used for monitoring the voltage and current information of the power distribution cabinet;
the signal input circuit 1 inputs a voltage current signal to the voltage current detection circuit 2, and the voltage current detection circuit 2 transmits the detected voltage current signal to the main controller 4 through the AC/DC conversion circuit 3; the main controller 4 respectively controls the overcurrent and overvoltage protection circuit 5 and the voltage and current monitoring module 7; the overcurrent and overvoltage protection circuit 5 is used for protecting overvoltage and overcurrent in the circuit.
The voltage and current detection circuit 2 comprises a zero-crossing comparison circuit 21, a capture phase-locked current 22, a pulse width modulation signal circuit 23 and a direct current side single chip microcomputer 24; the zero-crossing comparison circuit 21 is used for converting an analog signal into a digital signal, and the capture phase-locked circuit 22 is used for capturing and locking a direct-current signal of the zero-crossing comparison circuit 21 so as to improve the stability of a direct-current power supply;
the pulse width modulation signal (PWM)23 is used for timing analysis of the period and duty ratio of the pulse width modulation signal to obtain a digital signal; the direct-current side single chip microcomputer 24 is used for converting a direct-current signal into an alternating-current signal;
the zero-cross comparison circuit 21 inputs the input direct current signal to the pulse width modulation signal circuit (PWM)23 through the capture phase locking circuit 22; the pulse width modulation signal circuit (PWM)23 converts the signal into an alternating current signal through the direct current side single chip microcomputer 24; the DC-side single chip 24 transmits an AC signal to the AC/DC conversion circuit 3, converts the AC signal into a digital signal, and inputs the digital signal to the main controller 4.
In this embodiment, the main controller is a chip with a model of UC 3846.
In one embodiment, the voltage and current detection circuit 2 further includes a sampling circuit 25, an ac-side single chip 26, and a filter circuit 27; the sampling circuit 25 samples the input ac signal and transmits the sampled ac signal to the ac-side single chip microcomputer 26, and the ac-side single chip microcomputer 26 converts the ac signal into a dc signal, and the dc signal is filtered by the filter circuit 27 and then input to the dc-side single chip microcomputer 24.
The direct current side single chip microcomputer 24 converts the input direct current signal into an alternating current signal, and then converts the alternating current signal into a digital signal through the AC/DC conversion circuit 3 and transmits the digital signal to the main controller 4.
In one embodiment, the main controller 4 includes a leakage protection circuit 6, and the main controller 4 inputs a control signal to the leakage protection circuit 6 through a relay 61.
The earth leakage protection circuit 6 performs earth leakage protection by controlling the relay 61.
Example 2
Referring to fig. 1, the difference from the above embodiment is that the voltage and current monitoring module 7 of the present invention includes a data transmission module 71, and the data transmission module 71 is used for transmitting data of the monitored signal.
The voltage and current monitoring module 7 can remotely transmit the monitored voltage and current information in a wireless or wired manner through the data transmission module 71; therefore, the remote control center can monitor the voltage and current information of the power distribution cabinet conveniently, and the labor cost is saved by controlling the voltage and current of the power distribution cabinet.
In this embodiment, the voltage and current monitoring module 7 further includes an alarm module 72, where the alarm module 72 is configured to alarm for voltage and current overload.
When the monitoring control module 1 monitors that the voltage and the current in the power distribution cabinet are overloaded, an alarm is given through the alarm module 72 to remind maintenance personnel of processing faults in time.
In this embodiment, the voltage and current monitoring module 7 includes a voltage and current metering module 73, and the metering module 73 is configured to meter the voltage and the current. The voltage and current metering module 73 facilitates the statistics of the voltage and the current by maintenance personnel.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (7)
1. The utility model provides a switch board control system which characterized in that: the device comprises a signal input circuit, a voltage and current detection circuit, an AC/DC conversion circuit, a main controller, an overcurrent and overvoltage protection circuit and a voltage and current monitoring module; the signal input circuit is used for inputting voltage and current signals; the voltage and current detection circuit is used for detecting the frequency and the phase of the alternating voltage of the input circuit; the AC/DC conversion circuit is used for converting an analog signal into a digital signal; the main controller is used for controlling and analyzing signal information; the voltage and current monitoring module is used for monitoring the voltage and current information of the power distribution cabinet;
the signal input circuit inputs a voltage current signal to the voltage current detection circuit, and the voltage current detection circuit transmits the detected voltage current signal to the main controller through the AC/DC conversion circuit; the main controller respectively controls the overcurrent and overvoltage protection circuit and the voltage and current monitoring module;
the voltage and current detection circuit comprises a zero-crossing comparison circuit, a phase-locked current capturing circuit, a pulse width modulation signal circuit and a direct-current side single chip microcomputer; the zero-crossing comparison circuit is used for converting an analog signal into a digital signal, the capture phase-locked circuit is used for capturing and locking a direct-current signal of the zero-crossing comparison circuit, the pulse width modulation signal is used for modulating a signal, and the direct-current side single chip microcomputer is used for converting the direct-current signal into an alternating-current signal;
the zero-crossing comparison circuit inputs a voltage current signal to the pulse width modulation signal circuit through capturing phase-locked current; the pulse width modulation signal circuit transmits signals to the AC/DC conversion circuit through a direct current side single chip microcomputer.
2. The switch board control system of claim 1, characterized in that: the main controller is a chip with model UC 3846.
3. The switch board control system of claim 1, characterized in that: the voltage and current detection circuit also comprises a sampling circuit, an alternating current side singlechip and a filter circuit; the sampling circuit samples the input alternating current signal, converts the alternating current signal into a direct current signal through the alternating current side single chip microcomputer, and inputs the direct current signal into the direct current side single chip microcomputer through the filter circuit.
4. The switch board control system of claim 1, characterized in that: the main controller comprises a leakage protection circuit, and inputs a control signal to the leakage protection circuit through a relay.
5. The switch board control system according to any of claims 1-4, characterized in that: the voltage and current monitoring module comprises a data transmission module which is used for transmitting data of the monitored signals.
6. The switch board control system according to any of claims 1-4, characterized in that: the voltage and current monitoring module comprises an alarm module which is used for alarming voltage and current overload.
7. The switch board control system according to any of claims 1-4, characterized in that: the voltage and current monitoring module comprises a voltage and current metering module which is used for metering voltage and current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922500771.8U CN211698650U (en) | 2019-12-31 | 2019-12-31 | Power distribution cabinet control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922500771.8U CN211698650U (en) | 2019-12-31 | 2019-12-31 | Power distribution cabinet control system |
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| CN211698650U true CN211698650U (en) | 2020-10-16 |
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| CN201922500771.8U Active CN211698650U (en) | 2019-12-31 | 2019-12-31 | Power distribution cabinet control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113098298A (en) * | 2021-03-02 | 2021-07-09 | 国网河北省电力有限公司雄安新区供电公司 | Direct current power supply cabinet |
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2019
- 2019-12-31 CN CN201922500771.8U patent/CN211698650U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113098298A (en) * | 2021-03-02 | 2021-07-09 | 国网河北省电力有限公司雄安新区供电公司 | Direct current power supply cabinet |
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