CN106936214B - 380V distribution line power transmission warning system based on power line carrier communication and implementation method thereof - Google Patents
380V distribution line power transmission warning system based on power line carrier communication and implementation method thereof Download PDFInfo
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- CN106936214B CN106936214B CN201611267460.6A CN201611267460A CN106936214B CN 106936214 B CN106936214 B CN 106936214B CN 201611267460 A CN201611267460 A CN 201611267460A CN 106936214 B CN106936214 B CN 106936214B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00007—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using the power network as support for the transmission
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/121—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using the power network as support for the transmission
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Abstract
The invention discloses a 380V distribution line power transmission warning system based on power line carrier communication, which comprises a distribution room transformer, wherein the distribution room transformer is connected with four voltages of an A phase line, a B phase line, a C phase line and an N phase line, the distribution room transformer is connected with an alternating current contactor, the C phase line and the N phase line output by the distribution room transformer are connected with a signal sending module, the alternating current contactor is connected with an air switch, the A phase line and the N phase line which are connected with the air switch are connected with the signal sending module, the air switch is connected with meter boxes or distribution ends of a plurality of users, and the A phase line and the N phase line which are connected with the air switch. Has the following advantages: the early warning can be carried out before power transmission, and personal safety and property loss caused by misoperation of other personnel are prevented.
Description
Technical Field
The invention relates to a 380V distribution line power transmission warning system based on power line carrier communication and an implementation method thereof, and belongs to the technical field of wireless communication and early warning electronics.
Background
In a 380V resident power distribution system, power failure is often required due to line faults, line changes, line maintenance and the like, and personnel on the line can operate conveniently. And after the line maintenance is finished, line power transmission is carried out. Under normal conditions, all maintenance personnel can be informed, the exposed part of the line is kept away, and other people can not be avoided approaching the dangerous part. Based on this situation, a real-time warning device is needed to remind people who are not notified due to accidents.
Disclosure of Invention
The invention aims to solve the technical problem that a 380V distribution line power transmission warning system based on power carrier communication and an implementation method thereof are provided, and the 380V distribution line power transmission warning system has the advantages that early warning can be performed before power transmission, and personal safety and property loss caused by misoperation of other personnel are prevented.
In order to solve the technical problems, the invention adopts the following technical scheme:
380V distribution lines power transmission warning system based on power line carrier communication, including the electricity distribution room transformer, the electricity distribution room transformer connects out A phase line, B phase line, C phase line, N phase line four-way voltage, and the electricity distribution room transformer is connected with ac contactor, the C phase line and the N phase line of electricity distribution room transformer output are connected and are sent the signal module, and ac contactor connects and send the signal module, and ac contactor connects has air switch, connects A phase line, N phase line connection after the air switch and sends the signal module, and air switch is connected with a plurality of user's table case or distribution end, and A phase line, N phase line after connecting air switch are connected with a plurality of received signal module.
Furthermore, the signal sending module comprises a first rectifying and voltage-reducing chopper circuit, a first digital processor and peripheral circuits thereof, an alternating current contactor or circuit breaker trigger circuit, a signal sending circuit, a state display circuit, a signal transmission circuit inside the first digital processor and a power supply circuit inside the signal sending module.
Furthermore, the signal receiving module comprises a second rectifying and voltage-reducing chopper circuit, a line voltage detection circuit, a second digital processor and a peripheral circuit thereof, a buzzer sound production circuit, a warning light circuit, a signal transmission circuit inside the second digital processor, and a power supply circuit inside the signal receiving module.
Further, the first rectifying and buck chopper circuit comprises a 220V ac power supply 91, one end of the 220V ac power supply 91 is connected with pin 1 of a transformer 97, pin 2 of the transformer 97 is connected with the other end of the 220V ac power supply 91, pin 4 of the transformer 97 is connected with the anode of a diode D1 and the cathode of a diode D2, the anode of a diode D2 is grounded, the anode of a diode D1 is connected with the cathode of a diode D4, the anode of a diode D4 is connected with the cathode of a diode D3, the anode of a diode D3 is grounded, the anode of a diode D4 is connected with pin 3 of the transformer 97, the cathode of a diode D4 is connected with one end of a capacitor C1 and pin 1 of a three-terminal voltage-stabilizing integrated circuit 7812, the other end of the capacitor C1 is grounded, pin 2 of the three-terminal voltage-stabilizing integrated circuit LM7812 is grounded, pin 3 of the three-terminal voltage-stabilizing integrated circuit LM7812 is connected with pin 1 of a capacitor C3, one, and 12V direct current voltage is output, the other end of the capacitor C3 is grounded, the other end of the 15V super capacitor module 94 is grounded, the 2 pin of the three-terminal voltage-stabilizing integrated circuit LM7805 is grounded, the 3 pin of the three-terminal voltage-stabilizing integrated circuit LM7805 is connected with one end of a capacitor C3 and outputs 5V direct current voltage, and the other end of the capacitor C3 is grounded.
Furthermore, the warning light circuit comprises a constant current control module 101, the constant current control module is a constant current control circuit mainly composed of a chip PAM2861CBR, the constant current control module 101 is connected with three groups of diodes connected in parallel, each group of diodes is composed of four diodes connected in series, the constant current control module 101 is connected with a pin 1 of a relay T1, a pin 2 of the relay T1 is connected with a 12V direct-current power supply, a pin 4 of the relay T1 is connected with a negative electrode of a diode D5 and is connected with a 5V direct-current power supply, a pin 5 of the relay T1 is connected with a positive electrode of a diode D5, a positive electrode of the diode D5 is connected with a collector of a triode Q1, an emitter of a triode Q1 is grounded, a base of the triode Q1 is connected with a negative electrode of a diode D6, and a positive electrode.
Further, ac contactor or circuit breaker trigger circuit include STC12 singlechip I/O mouth, STC12 singlechip I/O mouth is connected with diode D7 anodal, diode D7 negative pole is connected with the base of triode Q2, triode Q2's emitter ground, triode Q2's collector is connected with diode D8's anodal, diode D8's negative pole is connected with relay T2's 2 feet, and insert 5V DC power supply, relay T2's 1 foot is connected with diode D8 negative pole, relay T2's 3 feet are connected with 220V AC power supply, relay T2's 5 feet are connected with ac contactor control port, the singlechip pin is through controlling the relay after the triode amplifies, and then control ac contactor.
Further, the line voltage detection circuit comprises an AD sampling circuit 131, the AD sampling circuit 131 is an AD7682 circuit, the AD sampling circuit 131 is connected with pin 1 of a dual operational amplifier 132, the dual operational amplifier 132 is of the type LM358, pin 2 of the dual operational amplifier 132 is connected to a 12V dc power supply, pin 5 of the dual operational amplifier 132 is grounded, pin 4 of the dual operational amplifier 132 is connected with one end of a resistor R9, the other end of the resistor R9 is connected with pin 1 of the dual operational amplifier 132, pin 3 of the dual operational amplifier 132 is connected with one end of a resistor R8 and one end of a resistor R6, the other end of the resistor R8 is grounded, the other end of the resistor R6 is connected with one end of a capacitor C8 and one end of a resistor R5, the other end of a capacitor C8 is connected with one end of a resistor R7, the other end of the resistor R7 is connected with pin 4 of the dual operational amplifier 132, the other end of the resistor R5, the other end of the capacitor C7 is connected with the other end of the resistor R4, the other end of the resistor R3 is connected with the cathode of the diode D17 and the cathode of the diode D14, the anode of the diode D17 is connected with the cathode of the diode D16, the anode of the diode D16 is connected with the resistor R4, the anode of the diode D14 is connected with the cathode of the diode D15, and the anode of the diode D15 is connected with the anode of the diode D16.
Further, the implementation method of the power transmission warning system comprises a control method of a signal sending module and a control method of a signal receiving module.
Further, the control method of the signal sending module includes the following steps:
and step 79, finishing the whole power transmission warning process and waiting for the next operation.
Further, the control method of the signal receiving module includes the following steps:
and step 812, ending the whole power transmission warning process and waiting for the next operation.
The 380V distribution line power transmission warning system based on power carrier communication and the implementation method thereof have the following advantages:
the power transmission warning system of the power grid line based on wireless communication is characterized in that a power transmission early warning device is added in the conventional 380V power distribution network, and warning before power transmission can be realized without changing a circuit, so that the phenomenon that personnel threatens personal safety when personnel approach to a lead exposed part after line maintenance is avoided. The system improves the safety of personnel, avoids unnecessary disputes and improves the operability of maintenance personnel.
In addition, when the signal needs to be transmitted in real time in a short distance, the warning device can also be used
The present invention will be described in detail below with reference to the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic structural diagram of a power transmission warning system according to an embodiment of the present invention;
fig. 2 is a block diagram of a signal sending portion of the power transmission warning system according to the embodiment of the present invention;
fig. 3 is a block diagram of a signal receiving portion of the power transmission warning system according to the embodiment of the present invention;
FIG. 4 is a schematic diagram of a rectifying buck chopper circuit according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a warning light circuit according to an embodiment of the present invention;
fig. 6 is a circuit breaker trip circuit in an embodiment of the present invention;
FIG. 7 is a schematic diagram of a circuit for detecting line voltage according to an embodiment of the present invention;
FIG. 8 is a control flow chart of a signal transmission section in the embodiment of the present invention;
FIG. 9 is a control flow chart of a received signal portion according to an embodiment of the present invention;
the list of parts listed in the drawings is as follows:
11: the transmission signal module 21: distribution transformer (10 kV:0.4 kV)
31: the ac contactor 32: air switch
41: user 1 meter box or distribution terminal 142: user 2 meter box or distribution terminal 2
4 n: user n meter box or distribution terminal n 411: 41 additional received signal module
421: 42 additional received signal module 4n 1: 4n additional received signal module
1: the power end 2 of the zero line of the signal sending module: c-phase line power supply end of signal sending module
3: trigger end 4 of ac contactor: a phase line output end of signal sending module
5: zero line end of signal sending module
51: rectifying step-down chopper circuit 52: digital processor and peripheral circuit thereof
53: ac contactor or circuit breaker triggering circuit 54: signal transmission circuit
55: the status display circuit 56: digital processor and peripheral circuit internal signal circuit thereof
511: internal power circuit of signal sending module
61: the rectifying step-down chopper circuit 62: line voltage detection circuit
63: digital processor and its peripheral circuits 64: buzzer sound production circuit
65: warning light circuit 66: digital processor and peripheral circuit internal signal line thereof
611: internal power line 621 of signal receiving module: line voltage detection circuit test wire
71: start signal generator 72: send out early warning signal
73: start countdown 30s 74: whether or not
75: end of countdown 76: is that
77: trigger a.c. contactor
78: the signal lamp flickers, the buzzer prompts, and the processor enters a dormant state after 20s
79: end up
81: grid outage trigger start 82: whether or not
83: whether the detected voltage is a warning signal 84: is that
85: triggering the warning light, triggering the buzzer 86: count down for 30s
87: end of countdown 88: whether or not
89: is 810: stop all actions
811: the processor enters the sleep state 812: end up
91: 220V AC power supply 92: LM7812
93: LM 780594: super capacitor module
95: 12V dc power supply 96: 5V DC power supply
97: transformer with transformation ratio of 10:1
101: constant current control module 102: I/O port of single chip microcomputer
103: triode 9013
111: singlechip I/O port 113: circuit breaker control port
131: AD sampling circuit 132: LM 358.
Detailed Description
The signal sending module 11 is mainly used for sending an early warning signal to the tail end of the power distribution network before power transmission and automatically transmitting power; the signal receiving modules 411, 421, … …, and 4n1 are mainly used for receiving the power line warning signal in real time and responding to the signal to warn the staff and other nearby staff; existing distribution lines, mainly for providing communication channels; the alternating current contactor 31 on the low-voltage outgoing line side of the distribution transformer is mainly used for controlling delayed power transmission; distribution transformer low voltage outlet side air switch 32.
As shown in fig. 2, the transmission signal module 11 includes a first rectifying and buck chopper circuit 51, a first digital processor and its peripheral circuit 52, an ac contactor or circuit breaker trigger circuit 53, a signal transmission circuit 54, a status display circuit 55, a first digital processor internal signal transmission circuit 56, and a transmission signal module internal power supply circuit 511, the first rectifying and buck chopper circuit 51 is connected to the transmission signal module internal power supply circuit 511, the transmission signal module internal power supply circuit 511 is connected to the first digital processor and its peripheral circuit 52, the ac contactor or circuit breaker trigger circuit 53, the signal transmission circuit 54, and the status display circuit 55, the status display circuit 55 is connected to the first digital processor and its peripheral circuit 52, the first digital processor and its peripheral circuit 52 are connected to the ac contactor or circuit breaker trigger circuit 53 and the signal transmission circuit 54, the first digital processor internal signal transmission circuit 56 is connected to the first digital processor and its peripheral circuits 52, the ac contactor or circuit breaker triggering circuit 53, and the status display circuit 55.
The signal sending module has 3 parts of wiring and comprises single-phase alternating current power lines 1 and 2, an alternating current contactor or circuit breaker triggering circuit line 3 and signal sending circuit lines 4 and 5.
The first rectifying and voltage-reducing chopper circuit 51 is used for dividing 220V alternating current by a resistor and capacitor parallel circuit, then connecting the 220V alternating current to a rectifying circuit to obtain direct current, stabilizing the voltage to obtain stable voltage suitable for the interior of a module, and simultaneously connecting an energy storage element in parallel; the internal power circuit 511 of the signal sending module is used for sending the direct-current voltage output by the rectification step-down chopper circuit 51 to the power supply end of other functional areas in the module; the first digital processor and its peripheral circuit 52 is a single chip or a digital signal processor with basic control function, and has a basic peripheral circuit; the peripheral circuit mainly refers to a crystal oscillator circuit, an output port pull-up circuit, an interrupt auxiliary circuit and the like; the alternating current contactor or circuit breaker trigger circuit 53 is a circuit for amplifying signals of the digital processor and peripheral circuits thereof to enable the alternating current contactor to be controlled; the signal transmitting circuit 54 is a circuit capable of responding to the early warning signal of the digital processor and the peripheral circuits thereof and transmitting a voltage signal to the distribution line; the state display circuit 55 is a display circuit capable of reflecting the working state of the current digital processor and its peripheral circuits; the first digital processor internal signal transfer circuit 56 is an internal circuit for issuing commands to other internal functional areas by the index word processor and its peripheral circuits.
As shown in fig. 3, the signal receiving module mainly includes a second rectifying buck chopper circuit 61, a line voltage detection circuit 62, a second digital processor and its peripheral circuit 63, a buzzer sound-generating circuit 64, a warning light circuit 65, a second digital processor internal signal transmission circuit 66, a signal receiving module internal power supply circuit 611, etc., the second rectifying buck chopper circuit 61 is connected to the signal receiving module internal power supply circuit 611, the signal receiving module internal power supply circuit 611 is connected to the line voltage detection circuit 62, the second digital processor and its peripheral circuit 63, the buzzer sound-generating circuit 64, and the warning light circuit 65, the line voltage detection circuit 62 is connected to the second digital processor and its peripheral circuit 63, the second digital processor and its peripheral circuit 63 are connected to the buzzer sound-generating circuit 64, the buzzer circuit 64 is connected to the warning light circuit 65, and the second digital processor internal signal transmission circuit 66 is connected to the line voltage detection circuit 62, A second digital processor and its peripheral circuit 63, a buzzer sounding circuit 64.
The signal receiving module is provided with 1 wiring, namely an A-phase line and a zero line.
The second rectifying and voltage-reducing chopper circuit 61 is a circuit which divides 220V alternating current by a resistor and capacitor parallel circuit, then is connected with a rectifying circuit to obtain direct current, stabilizes voltage to obtain stable voltage suitable for the interior of the module, is connected with an energy storage element in parallel, and supplies power to an internal circuit under the condition of power failure; the internal power circuit 611 of the signal receiving module is used for sending the direct-current voltage output by the second rectifying and voltage-reducing chopper circuit 61 to the power supply terminals of other functional areas in the module; the second digital processor and its peripheral circuit 63 is a single chip or a digital signal processor with basic control function, and has a basic peripheral circuit; the peripheral circuit mainly refers to a crystal oscillator circuit, an output port pull-up circuit, an interrupt auxiliary circuit and the like; the line voltage detection circuit 62 is a circuit for detecting the voltage on the line and judging whether the power supply is normal or an early warning signal; the buzzer sounding circuit 64 is a circuit capable of recognizing early warning signals of the digital processor and peripheral circuits thereof and sounding; the warning light circuit 65 is a circuit capable of identifying the early warning signals of the digital processor and the peripheral circuits thereof and enabling the warning light to act; the digital processor internal signal transfer circuit 66 is an internal circuit for issuing commands to other internal functional areas by the digital processor and its peripheral circuits.
The existing distribution line refers to a line from a distribution transformer outlet end switch to a user distribution meter box or a user terminal.
As shown in FIG. 4, the first rectifying buck chopper circuit 51 and the second rectifying buck chopper circuit 61 are connected in the same circuit, the rectifying buck chopper circuit includes a 220V AC power source 91, one end of the 220V AC power source 91 is connected with pin 1 of a transformer 97, pin 2 of the transformer 97 is connected with the other end of the 220V AC power source 91, pin 4 of the transformer 97 is connected with the anode of a diode D1 and the cathode of a diode D2, the anode of a diode D2 is grounded, the anode of a diode D1 is connected with the cathode of a diode D4, the anode of a diode D4 is connected with the cathode of a diode D3, the anode of a diode D3 is grounded, the anode of a diode D4 is connected with pin 3 of the transformer 97, the cathode of the diode D4 is connected with one end of a capacitor C1 and pin 1 of a three-terminal voltage stabilizing integrated circuit LM7812, the other end of the capacitor C1 is grounded, pin 2 of the three-terminal voltage stabilizing integrated circuit LM7812 is grounded, the 3 pin, 15V super capacitor module 94 one end, three-terminal regulator integrated circuit LM 7805's 1 foot to output 12V direct current voltage, electric capacity C3 other end ground connection, 15V super capacitor module 94 other end ground connection, three-terminal regulator integrated circuit LM 7805's 2 feet ground connection, three-terminal regulator integrated circuit LM 7805's 3 feet are connected with electric capacity C3 one end, and output 5V direct current voltage, electric capacity C3 other end ground connection.
The rectification step-down chopper circuit reduces alternating voltage through the transformer, the diode rectifies and filters to obtain direct current voltage, and the direct current voltage is reduced through the chopper circuit to obtain a set direct current voltage signal.
As shown in fig. 5, the warning light circuit 65 includes a constant current control module 101, the constant current control module is a constant current control circuit mainly composed of a chip PAM2861CBR, the constant current control module 101 is connected with three groups of diodes connected in parallel, each group of diodes is composed of four diodes connected in series, the constant current control module 101 is connected with pin 1 of a relay T1, pin 2 of the relay T1 is connected with a 12V dc power supply, pin 4 of the relay T1 is connected with the negative electrode of a diode D5 and is connected to a 5V dc power supply, pin 5 of the relay T1 is connected with the positive electrode of a diode D5, the positive electrode of a diode D5 is connected with the collector of a triode Q1, the emitter of a triode Q1 is grounded, the base of the triode Q1 is connected with the negative electrode of a diode D6, and the positive electrode of the diode D36.
As shown in fig. 6, the ac contactor or circuit breaker triggering circuit 53 includes an STC12 single chip microcomputer I/O port, the STC12 single chip microcomputer I/O port is connected with the anode of a diode D7, the cathode of the diode D7 is connected with the base of a transistor Q2, the emitter of the transistor Q2 is grounded, the collector of the transistor Q2 is connected with the anode of a diode D8, the cathode of the diode D8 is connected with a pin 2 of a relay T2 and is connected with a 5V dc power supply, a pin 1 of the relay T2 is connected with the cathode of a diode D8, a pin 3 of the relay T2 is connected with a 220V ac power supply, a pin 5 of the relay T2 is connected with an ac contactor control port, and the pin of the single chip microcomputer is amplified by the.
As shown in fig. 7, the line voltage detection circuit includes an AD sampling circuit 131, the AD sampling circuit 131 is an AD7682 circuit, the AD sampling circuit 131 is connected to pin 1 of a dual operational amplifier 132, the dual operational amplifier 132 is of the type LM358, pin 2 of the dual operational amplifier 132 is connected to a 12V dc power supply, pin 5 of the dual operational amplifier 132 is grounded, pin 4 of the dual operational amplifier 132 is connected to one end of a resistor R9, the other end of the resistor R9 is connected to pin 1 of the dual operational amplifier 132, pin 3 of the dual operational amplifier 132 is connected to one end of a resistor R8 and one end of a resistor R6, the other end of the resistor R8 is grounded, the other end of the resistor R6 is connected to one end of a capacitor C8 and one end of a resistor R5, the other end of a capacitor C8 is connected to one end of a resistor R7, the other end of the resistor R7 is connected to pin 4 of the dual operational amplifier 132, the other end of the, the other end of the capacitor C7 is connected with the other end of the resistor R4, the other end of the resistor R3 is connected with the cathode of the diode D17 and the cathode of the diode D14, the anode of the diode D17 is connected with the cathode of the diode D16, the anode of the diode D16 is connected with the resistor R4, the anode of the diode D14 is connected with the cathode of the diode D15, and the anode of the diode D15 is connected with the anode of the diode D16.
The line voltage detection circuit is a circuit for detecting the voltage on the line and judging whether the power supply is normal or an early warning signal; mainly comprises the following components: the line voltage is rectified and converted, is divided by a large resistor, is filtered and then is connected with a differential amplifier circuit (LM358), and an AD circuit (AD7682) measures a voltage value and judges whether the voltage value is an early warning signal according to the magnitude of the voltage value.
As shown in fig. 8 and 9, the method for implementing the 380V distribution line power transmission warning system based on power carrier communication includes a control method for a signal transmission portion and a control method for a signal reception portion.
The control method of the signal transmission part comprises the following steps:
and step 79, finishing the whole power transmission warning process and waiting for the next operation.
The control method of the received signal part comprises the following steps:
and step 812, ending the whole power transmission warning process and waiting for the next operation.
In this embodiment, the warning signal is a dc voltage with a specific voltage value; the specific voltage value is determined by factors such as field distribution lines, personnel safety, line loss and the like.
The 380V distribution line power transmission warning lamp system based on the improved power carrier communication is characterized in that a power transmission warning device is added into the existing 380V distribution network, and warning before power transmission can be realized without changing a circuit, so that the problem that personnel threatens personal safety when personnel approach to a lead exposed position after line maintenance is avoided. The system improves the safety of personnel, avoids unnecessary disputes and improves the operability of maintenance personnel.
The foregoing is illustrative of the best mode of the invention and details not described herein are within the common general knowledge of a person of ordinary skill in the art. The scope of the present invention is defined by the appended claims, and any equivalent modifications based on the technical teaching of the present invention are also within the scope of the present invention.
Claims (4)
1. 380V distribution lines power transmission warning system based on power line carrier communication, including distribution room transformer (21), distribution room transformer (21) connect out A phase line, B phase line, C phase line, N phase line four-way voltage, and distribution room transformer (21) are connected with ac contactor (31), its characterized in that: c phase lines and N phase lines output by the distribution room transformer (21) are connected with the signal sending module (11), the alternating current contactor (31) is connected with the air switch (32), the A phase lines and the N phase lines after being connected with the air switch (32) are connected with the signal sending module (11), the air switch (32) is connected with meter boxes or distribution ends of a plurality of users, and the A phase lines and the N phase lines after being connected with the air switch (32) are connected with a plurality of signal receiving modules;
the sending signal module (11) comprises a first rectifying and voltage-reducing chopper circuit (51), a first digital processor and peripheral circuits (52) thereof, an alternating current contactor or circuit breaker trigger circuit (53), a signal sending circuit (54), a state display circuit (55), a first digital processor internal signal transmission circuit (56) and a sending signal module internal power supply circuit (511), the first rectifying and voltage-reducing chopper circuit (51) is connected with the sending signal module internal power supply circuit (511), the sending signal module internal power supply circuit (511) is connected with the first digital processor and peripheral circuits (52) thereof, the alternating current contactor or circuit breaker trigger circuit (53), the signal sending circuit (54) and the state display circuit (55), the state display circuit (55) is connected with the first digital processor and peripheral circuits (52) thereof, and the first digital processor and peripheral circuits (52) are connected with the alternating current contactor or circuit breaker trigger circuit (53) and the signal sending circuit (54) ) The internal signal transmission circuit (56) of the first digital processor is connected with the first digital processor and a peripheral circuit (52) thereof, an alternating current contactor or circuit breaker trigger circuit (53) and a state display circuit (55);
the first rectifying and voltage-reducing chopper circuit (51) comprises a 220V alternating current power supply (91), one end of the 220V alternating current power supply (91) is connected with a pin 1 of a transformer (97), a pin 2 of the transformer (97) is connected with the other end of the 220V alternating current power supply (91), a pin 4 of the transformer (97) is connected with the anode of a diode D1 and the cathode of a diode D2, the anode of a diode D2 is grounded, the cathode of a diode D1 is connected with the cathode of a diode D4, the anode of a diode D4 is connected with the cathode of a diode D3, the anode of a diode D3 is grounded, the anode of a diode D4 is connected with a pin 3 of the transformer (97), the cathode of a diode D4 is connected with one end of a capacitor C1 and a pin 1 of a three-terminal voltage-stabilizing integrated circuit LM7812, the other end of the capacitor C1 is grounded, the pin 2 of the three-terminal voltage-stabilizing integrated circuit LM7812 is connected with one end of a super capacitor C36, A pin 1 of the three-terminal voltage-stabilizing integrated circuit LM7805 outputs 12V direct-current voltage, the other end of the capacitor C2 is grounded, the other end of the 15V super capacitor module (94) is grounded, a pin 2 of the three-terminal voltage-stabilizing integrated circuit LM7805 is grounded, a pin 3 of the three-terminal voltage-stabilizing integrated circuit LM7805 is connected with one end of a capacitor C3 and outputs 5V direct-current voltage, and the other end of the capacitor C3 is grounded;
the signal receiving module comprises a second rectifying and voltage-reducing chopper circuit (61), a line voltage detection circuit (62), a second digital processor and a peripheral circuit (63) thereof, a buzzer sound production circuit (64), a warning light circuit (65), a signal transmission circuit (66) inside the second digital processor and a signal receiving module internal power circuit (611), wherein the second rectifying and voltage-reducing chopper circuit (61) is connected with the signal receiving module internal power circuit (611), the signal receiving module internal power circuit (611) is connected with the line voltage detection circuit (62), the second digital processor and the peripheral circuit (63) thereof, the buzzer sound production circuit (64) and the warning light circuit (65), the line voltage detection circuit (62) is connected with the second digital processor and the peripheral circuit (63) thereof, and the second digital processor and the peripheral circuit (63) thereof are connected with the buzzer sound production circuit (64), the buzzer sounding circuit (64) is connected with the warning lamp circuit (65), and the internal signal transmission circuit (66) of the second digital processor is connected with the circuit voltage detection circuit (62), the second digital processor and the peripheral circuit (63) thereof and the buzzer sounding circuit (64);
the alternating current contactor or circuit breaker trigger circuit (53) comprises an STC12 single chip microcomputer I/O port, the STC12 single chip microcomputer I/O port is connected with the anode of a diode D7, the cathode of the diode D7 is connected with the base of a triode Q2, the emitter of the triode Q2 is grounded, the collector of the triode Q2 is connected with the anode of a diode D8, the cathode of the diode D8 is connected with a pin 2 of a relay T2 and is connected with a 5V direct current power supply, a pin 1 of the relay T2 is connected with the cathode of a diode D8, a pin 3 of the relay T2 is connected with a 220V alternating current power supply, a pin 5 of the relay T2 is connected with an alternating current contactor control port, and the pin of the single chip microcomputer.
2. The 380V distribution line power transmission warning system based on power carrier communication of claim 1, wherein: the warning light circuit (65) comprises a constant current control module (101), the constant current control module is a constant current control circuit mainly composed of a chip PAM2861CBR, the constant current control module (101) is connected with three groups of diodes connected in parallel, each group of diodes is composed of four diodes connected in series, the constant current control module (101) is connected with a pin 1 of a relay T1, a pin 2 of the relay T1 is connected with a 12V direct-current power supply, a pin 4 of the relay T1 is connected with a negative electrode of a diode D5 and is connected into a 5V direct-current power supply, a pin 5 of the relay T1 is connected with a positive electrode of a diode D5, a positive electrode of a diode D5 is connected with a collector of a triode Q2, an emitter of a triode Q2 is grounded, a base of the triode Q2 is connected with a negative electrode of a diode D6, and a.
3. The 380V distribution line power transmission warning system based on power carrier communication of claim 1, wherein: the line voltage detection circuit comprises an AD sampling circuit (131), the AD sampling circuit (131) adopts an AD7682 circuit, the AD sampling circuit (131) is connected with a pin 1 of a double operational amplifier (132), the model of the double operational amplifier (132) is LM358, a pin 2 of the double operational amplifier (132) is connected with a 12V direct-current power supply, a pin 5 of the double operational amplifier (132) is grounded, a pin 4 of the double operational amplifier (132) is connected with one end of a resistor R9, the other end of the resistor R9 is connected with the pin 1 of the double operational amplifier (132), a pin 3 of the double operational amplifier (132) is connected with one end of a resistor R8 and one end of a resistor R6, the other end of the resistor R8 is grounded, the other end of the resistor R6 is connected with one end of a capacitor C8 and one end of a resistor R5, the other end of the capacitor C8 is connected with one end of a resistor R7, the other end of the resistor R7 is connected with a pin, One end of a resistor R3 and one end of a resistor R4, the other end of a capacitor C7 is connected with the other end of a resistor R4, the other end of the resistor R3 is connected with the cathode of a diode D17 and the cathode of a diode D14, the anode of the diode D17 is connected with the cathode of the diode D16, the anode of a diode D16 is connected with the resistor R4, the anode of a diode D14 is connected with the cathode of the diode D15, and the anode of the diode D15 is connected with the anode of the diode D16.
4. A380V distribution line power transmission warning system implementation method based on power carrier communication is characterized in that: the method is implemented based on the 380V distribution line power transmission warning system based on power carrier communication of claim 1;
the implementation method of the power transmission warning system comprises a control method of a signal sending module and a control method of a signal receiving module;
the control method of the signal sending module comprises the following steps:
step 71, starting a signal generator, and entering step 72 after the signal generator is started;
step 72, the signal sending module sends out an early warning signal, after receiving the starting signal, the signal sending circuit in the signal sending module sends out a voltage signal to one phase circuit of the power distribution network, and step 73 is executed after the voltage signal is sent out;
step 73, starting to count down for 30s, and entering step 75 after the counting is finished;
step 75, judging whether the countdown is finished, if the countdown is not finished, returning to continue executing the step 75, and if the countdown is finished, entering the step 77;
step 77, the action of sending the signal by the signal sending circuit is stopped after 30s, the alternating current contactor or the circuit breaker trigger circuit triggers the closing of the alternating current contactor, and the step 78 is executed after the action is finished;
step 78, flashing a signal lamp, prompting by a buzzer, finishing power transmission of the power distribution network, displaying that the current power transmission is finished through a state display circuit, entering a sleep mode after 20s, and entering step 79 after finishing;
step 79, finishing the whole power transmission warning process and waiting for the next operation;
the control method of the signal receiving module comprises the following steps:
step 81, triggering a second digital processor and peripheral circuits thereof after power failure of the power grid, starting the second digital processor, and entering step 83 after the second digital processor is started;
step 83, the line voltage detection circuit detects the line voltage value, the second digital processor judges whether the line voltage value is an early warning signal or not, if the line voltage value is the early warning signal, the step 85 is entered, and if the line voltage value is not the early warning signal, the step 83 is returned to be continuously executed;
step 85, once the second digital processor detects the early warning signal, the buzzer sounding circuit triggers the buzzer, the warning lamp circuit triggers the warning lamp, and the step 86 is entered after the completion;
step 86, starting to count down for 30s, and entering step 87 after the counting is finished;
step 87, judging whether the countdown of 30s is finished, if so, entering step 810, otherwise, returning to continue to execute the step 87;
step 810, when the countdown is finished, stopping all actions by a buzzer circuit and a warning light circuit which are connected with the second digital processor, and entering step 811 after the countdown is finished;
step 811, the second digital processor goes to sleep, and then goes to step 812;
and step 812, ending the whole power transmission warning process and waiting for the next operation.
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| CN201611267460.6A CN106936214B (en) | 2016-12-31 | 2016-12-31 | 380V distribution line power transmission warning system based on power line carrier communication and implementation method thereof |
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| CN202472890U (en) * | 2012-03-09 | 2012-10-03 | 河北省电力研究院 | Power line carrier alarming device |
| CN103259276A (en) * | 2013-06-04 | 2013-08-21 | 长沙高升电子电器科技有限公司 | Automatic intelligent power distribution system and power distribution method |
| CN105007084A (en) * | 2015-08-05 | 2015-10-28 | 成都君禾天成科技有限公司 | Alarm transmitting circuit using power line carrier to transmit and communicate |
| CN105024735A (en) * | 2015-08-05 | 2015-11-04 | 成都君禾天成科技有限公司 | Alarm receiving circuit employing power line communication |
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| CN100544150C (en) * | 2007-08-22 | 2009-09-23 | 董右云 | Intelligentized electric energy management system assembled device |
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|---|---|---|---|---|
| CN202472890U (en) * | 2012-03-09 | 2012-10-03 | 河北省电力研究院 | Power line carrier alarming device |
| CN103259276A (en) * | 2013-06-04 | 2013-08-21 | 长沙高升电子电器科技有限公司 | Automatic intelligent power distribution system and power distribution method |
| CN105007084A (en) * | 2015-08-05 | 2015-10-28 | 成都君禾天成科技有限公司 | Alarm transmitting circuit using power line carrier to transmit and communicate |
| CN105024735A (en) * | 2015-08-05 | 2015-11-04 | 成都君禾天成科技有限公司 | Alarm receiving circuit employing power line communication |
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