CN210669620U - Electric energy meter control system with double-loop power supply - Google Patents
Electric energy meter control system with double-loop power supply Download PDFInfo
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- CN210669620U CN210669620U CN201921461137.1U CN201921461137U CN210669620U CN 210669620 U CN210669620 U CN 210669620U CN 201921461137 U CN201921461137 U CN 201921461137U CN 210669620 U CN210669620 U CN 210669620U
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Abstract
The utility model discloses an electric energy meter control system with double-loop power supply, which comprises a first power supply loop, a second power supply loop, a mutual inductor a, a mutual inductor b, a single chip microcomputer, a power module, a first control switch and a second control switch, wherein the power module is connected with the single chip microcomputer; the transformer a is used for detecting voltage and current data in a first power supply loop, the output end of the transformer a is connected with the single chip microcomputer, the transformer b is used for detecting voltage and current data in a second power supply loop, the output end of the transformer b is connected with the single chip microcomputer, the output end of the single chip microcomputer is respectively connected with the first control switch and the second control switch, a wiring terminal is led out from a loop for supplying power to the electric energy meter a through the mains supply a and is connected with the power supply end of the electric energy meter b through the first control switch, and a wiring terminal is led out from a loop for supplying power to the electric energy meter b through the mains supply b and is connected. The electric energy meters of the two loops can be controlled to be powered on to work through the control circuit, and timely uploading of information such as electric quantity is guaranteed.
Description
Technical Field
The utility model relates to a power supply control field, in particular to electric energy meter power supply system of two return circuits power supply.
Background
Some consumers with electricity use the design of double-loop power supply at present, and each loop is provided with an independent electric energy meter, metering equipment and collecting equipment. The double-loop power supply flexibly switches the power supply loop, so that the power utilization rights of users can be guaranteed to the maximum extent; however, when a single loop supplies power, the other standby loop comprises the electric energy meter which is completely power-off, so that information such as electric quantity, data and the like cannot be acquired, and the operation index of a power supply company is seriously influenced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a double-loop power supply electric energy meter control system which is used for ensuring that an electric energy meter is in a power supply state when a power supply loop is switched.
In order to achieve the purpose, the invention adopts the technical scheme that: a double-loop power supply electric energy meter control system comprises a first power supply loop consisting of an electric energy meter a and a junction box a, a second power supply loop consisting of an electric energy meter b and a junction box b, wherein a mains supply a is respectively connected with the electric energy meter a and a load through the junction box a, the mains supply b is respectively connected with the electric energy meter b and the load through the junction box b, the control system further comprises a mutual inductor a, a mutual inductor b, a single chip microcomputer, a power supply module, a first control switch and a second control switch, and the power supply module is connected with the single chip microcomputer; mutual-inductor a is arranged in detecting the voltage current data in the first power supply circuit, and its output is connected with the singlechip, mutual-inductor b is arranged in detecting the voltage current data in the second power supply circuit, and its output is connected with the singlechip, first control switch, second control switch are connected respectively to the singlechip output, draw forth binding post on the return circuit that is electric energy meter a power supply from commercial power a and be connected with electric energy meter b's supply end through first control switch, draw forth binding post on the return circuit that is electric energy meter b power supply from commercial power b and be connected with electric energy meter a through second control switch.
The power module supplies power to the single chip microcomputer, the power module comprises an ACDC converter, and the ACDC converter is respectively connected with a commercial power a and a commercial power b and is used for converting alternating current into direct current to supply power to the single chip microcomputer.
The single chip microcomputer is respectively connected with the indicator lamp a and the indicator lamp b and used for controlling the indicator lamp a and the indicator lamp b to work to display the power supply states of the electric energy meter a and the electric energy meter b.
A third control switch is arranged between the junction box a and the power supply input end of the electric energy meter a in series, and a fourth control switch is arranged between the junction box b and the power supply input end of the electric energy meter b in series; and the output end of the singlechip is respectively connected with the third control switch and the fourth control switch.
The power module further comprises a battery unit, the output end of the ACDC converter is connected with the battery unit, and the battery unit is connected with the single chip microcomputer.
The control system further comprises a timing unit, and the timing unit is connected with the single chip microcomputer.
The utility model has the advantages that: the control circuit can control the electric energy meters of the two loops to be powered on to work, ensures the timely uploading of information such as electric quantity and the like, avoids the inconvenience caused by the disconnection of one-loop power supply when switching in double-loop power supply in the prior art, and improves the meter reading rate and the acquisition rate; the control system has simple structure and low cost, changes the wiring of the double-loop system less and is convenient for the application of the system.
Drawings
The contents of the expressions in the various figures of the present specification and the labels in the figures are briefly described as follows:
FIG. 1 is a schematic diagram of a double-circuit power supply electric energy meter control system of the present invention;
fig. 2 is a schematic diagram of the control principle of the single chip microcomputer of the present invention.
Detailed Description
The following description of preferred embodiments of the invention will be made in further detail with reference to the accompanying drawings.
Among the prior art, among the power supply system of two return circuits, the electric energy meter in each return circuit adopts this return circuit power supply and statistics electric quantity, however when needs switch another return circuit power supply, the return circuit that is disconnected then can be in the outage state, can't work, its electric quantity data also can't in time upload to the control, very inconvenient to operations such as checking meter, but this application realizes the electric energy meter power supply work in two ways through the control circuit who increases the electric energy meter with its power supply based on this, concrete scheme is as follows:
as shown in fig. 1 and 2, a double-circuit power supply electric energy meter control system includes a first power supply circuit composed of an electric energy meter a and a junction box a, and a second power supply circuit composed of an electric energy meter b and a junction box b, wherein a mains supply a is respectively connected with the electric energy meter a and a load through the junction box a, and the mains supply b is respectively connected with the electric energy meter b and the load through the junction box b, so that the two circuits respectively supply power and count electric quantity through the respective junction box and the electric energy meter. On the basis, the control system further comprises a mutual inductor a, a mutual inductor b, a single chip microcomputer, a power supply module, a first control switch and a second control switch, wherein the power supply module is used for outputting electric energy for supplying power to the single chip microcomputer, and the output end of the power supply module is connected with a VCC power supply port of the single chip microcomputer. The mutual inductor a is used for mutually inducting a power supply signal of a first power supply loop, the mutual inductor b is used for mutually inducting a power supply signal of a second power supply loop, the output ends of the mutual inductor a and the mutual inductor b are both connected with the input end of the single chip microcomputer, the output end of the single chip microcomputer is respectively connected with the first control switch and the second control switch, the wiring terminal is led out from the loop of the mains supply a for supplying power to the electric energy meter a and is connected with the power supply end of the electric energy meter b through the first control switch, and the wiring terminal is led out from the loop of the mains supply b for supplying power to the electric energy meter.
When the single chip microcomputer works, the power supply states of the first power supply loop and the second power supply loop are detected by the single chip microcomputer through the mutual inductor a and the mutual inductor b, when the first power supply loop works, alternating current output by the junction box supplies power to a load, and meanwhile, the alternating current is input to a power supply input end of the electric energy meter to supply power to the electric energy meter and is input to a charging input end of the electric energy meter to record power consumption in real time. At this moment, because the second power supply loop is disconnected, the electric energy meter b is in a disconnected state, in order to avoid the situation, when the first power supply loop is detected to be in a power supply state, the second power supply loop is in the disconnected state, the single chip microcomputer outputs a control signal to the first control switch, the second control switch enables the first control switch to be closed (the second control switch is disconnected at this moment), and therefore power supply connected with the power supply input end of the electric energy meter a through the junction box a can be led into the power supply input end of the electric energy meter b, the electric energy meter b is enabled to work, and uploading of data such as electric quantity of the electric energy meter b is facilitated. Similarly, when the second power supply loop is detected to work and the second power supply loop is detected to be disconnected, the second control switch is controlled to be closed (the first control switch is disconnected), and the junction box b is led out of the power supply loop of the electric energy meter b to the power supply input end of the electric energy meter a, so that the power supply work of the electric energy meter a is met.
The first control switch and the second control switch are both realized by adopting relays, the coils of the relays are driven by the single chip microcomputer to control the closing of the contacts of the relays, and the contacts are correspondingly arranged in a loop to be controlled. The mutual inductor a and the mutual inductor b are used for voltage and current data in the mutual inductance loop so as to facilitate the single chip microcomputer to determine the working states of the first power supply loop and the second power supply loop at the moment. The transformer may be a voltage transformer or a current transformer. The electric energy meter possesses the function of long-range data transmission of checking meter and uploads for the present commonly used smart electric meter, its inside control circuit board needs the power supply work, thereby it realizes statistics of the electric quantity to connect the power supply circuit through the electric quantity statistics terminal simultaneously, this technical scheme connects the power supply input of electric energy meter respectively the power supply circuit of the electric energy meter of another return circuit through control switch, thereby realize that the power supply of the electric energy meter in the power supply circuit that adopts being supplying power draws the electric energy meter for another way in the double power supply return circuit and supplies power the work, thereby guarantee that two ways of electric energy meters are all in operating condition, and because only the internal circuit board power supply work of electric energy meter makes it can upload data and the power supply circuit that the electric quantity statistics port of this reserve electric energy meter corresponds belongs to the disconnection, so it can not repeatedly. When the single chip microcomputer detects that the two power supply loops are not in a power supply state through the mutual inductor a and the mutual inductor b, the single chip microcomputer needs to send alarm reminding at the moment, the single chip microcomputer is connected with the alarm and used for sending an alarm signal or the single chip microcomputer is connected with the monitoring server through the communication chip and used for sending reminding to the monitoring server of a user powered by the double circuits to remind of timely reminding of power failure, and the user powered by the double circuits has strict requirements on power supply stability, so that the reminding is very important.
The singlechip adopts any one of the commonly used 51 series singlechips, and the work of the singlechip is realized by building a minimum system of the singlechip. The power supply vcc end of the single chip microcomputer is connected with a power module, the power module can supply power in two modes, one mode is that a mains supply a and a mains supply b are connected with the single chip microcomputer after passing through an ACDC converter to supply power to the single chip microcomputer, and alternating current of the mains supply is directly rectified and converted into power supply direct current required by the single chip microcomputer; the secondary battery unit supplies power to the single chip microcomputer through the standby battery unit, the battery unit adopts a rechargeable lithium battery, the input end of the ACDC converter is connected with the commercial power a and/or the commercial power b, the output end of the ACDC converter is connected with the lithium battery and used for charging the lithium battery, and then the lithium battery supplies power to the single chip microcomputer.
The preferable single chip microcomputer is respectively connected with the indicator lamp a and the indicator lamp b and used for controlling the indicator lamp a and the indicator lamp b to work to display the power supply states of the electric energy meter a and the electric energy meter b. The working states of the two electric energy meters and the corresponding power supply loops in working are monitored and patrolled conveniently by personnel.
Preferably, a third control switch is arranged between the junction box a and the power supply input end of the electric energy meter a in series, and a fourth control switch is arranged between the junction box b and the power supply input end of the electric energy meter b in series; the output end of the singlechip is respectively connected with the third control switch and the fourth control switch. When the first power supply loop works, the first control switch is controlled to be closed to supply power to the electric energy meter b, and in order to prevent power return, the fourth control switch is switched off, and at the moment, the third control switch belongs to a closed state; meanwhile, when the second power supply loop works, the third control switch is switched off, and at the moment, the fourth control switch is in a closed state. Preferably, the third and fourth control switches are normally closed control switches, such as normally closed contacts of a relay.
Preferably, in order to further realize the accuracy of control, a timing unit is arranged, the timing unit is connected with the single chip microcomputer and provides a time delay timing function for the single chip microcomputer, and the preferable timing unit can be realized by adopting a self-contained timing unit in the single chip microcomputer. When the electric energy meter is in work, when power supply in the first power supply loop is detected, the junction box a and the electric energy meter a are in working states, voltage (in a power-off state) in a loop corresponding to the junction box b is detected, timing is started to control the timing unit to time at the moment, when the condition that no voltage is detected by the mutual inductor b within 5 minutes is met, the first control switch is controlled to be closed, the second control switch is switched off at the moment, then the first power supply loop supplies power to the power supply input end of the electric energy meter b, the electric energy meter b is in the working state, meanwhile, the power supply input end of the electric energy meter b is connected with the junction box b, namely, the fourth control switch is switched off, and therefore the electric energy meter a and the electric energy meter b can supply power to work, uploading of data of the electric energy meter b is facilitated, meanwhile. When the second power supply loop supplies power and the first power supply loop does not supply power, the principle is the same, and the two electric energy meters can be kept to work in a charged mode.
Compared with the prior art, the prior dual-power-supply client can not complete related actions, can not enable two sets of metering equipment to be electrified simultaneously, and always has one meter to upload electric quantity when power supply switching is met. The technical scheme overcomes the defects, and can simultaneously copy the electric quantity of two sets of metering equipment when the meter is read at the bottom of a moon, thereby avoiding missing copying, avoiding the line loss statistical defect and perfecting the line loss index. Moreover, the improvement point of the existing circuit is small, convenience is brought to users, modification and transformation cost is low, the simultaneous power supply function of the dual-power electric energy meter is increased, monitoring and data uploading are facilitated, potential safety hazards of reverse power transmission are avoided, all control is written into the single chip microcomputer for automatic operation, and the dual-power electric energy meter is safe and convenient. The two sets of metering points of the customer with dual power supplies are guaranteed to operate in an electrified mode simultaneously, timely collection and uploading of information such as electric quantity are guaranteed, the ammeter rate and the collection rate are improved, line loss statistics is improved, on-site manual meter reading is avoided, working intensity is reduced, safety risks are reduced, and partial voltage line loss statistical indexes are prevented from being examined.
It is clear that the specific implementation of the invention is not restricted to the above-described embodiments, but that various insubstantial modifications of the inventive process concept and technical solutions are within the scope of protection of the invention.
Claims (6)
1. The utility model provides an electric energy meter control system of two return circuits power supply, includes the first power supply loop that comprises electric energy meter a, terminal box a and the second power supply loop that comprises electric energy meter b, terminal box b, and electric supply a connects electric energy meter a and load respectively through terminal box a, and electric supply b connects electric energy meter b and load respectively through terminal box b, its characterized in that: the control system also comprises a mutual inductor a, a mutual inductor b, a single chip microcomputer, a power supply module, a first control switch and a second control switch, wherein the power supply module is connected with the single chip microcomputer; mutual-inductor a is arranged in detecting the voltage current data in the first power supply circuit, and its output is connected with the singlechip, mutual-inductor b is arranged in detecting the voltage current data in the second power supply circuit, and its output is connected with the singlechip, first control switch, second control switch are connected respectively to the singlechip output, draw forth binding post on the return circuit that is electric energy meter a power supply from commercial power a and be connected with electric energy meter b's supply end through first control switch, draw forth binding post on the return circuit that is electric energy meter b power supply from commercial power b and be connected with electric energy meter a through second control switch.
2. The dual-circuit powered electric energy meter control system of claim 1, wherein: the power module supplies power to the single chip microcomputer, the power module comprises an ACDC converter, and the ACDC converter is respectively connected with a commercial power a and a commercial power b and is used for converting alternating current into direct current to supply power to the single chip microcomputer.
3. The dual-circuit powered electric energy meter control system of claim 1, wherein: the single chip microcomputer is respectively connected with the indicator lamp a and the indicator lamp b and used for controlling the indicator lamp a and the indicator lamp b to work to display the power supply states of the electric energy meter a and the electric energy meter b.
4. A dual circuit powered electricity meter control system according to any of claims 1-3, wherein: a third control switch is arranged between the junction box a and the power supply input end of the electric energy meter a in series, and a fourth control switch is arranged between the junction box b and the power supply input end of the electric energy meter b in series; and the output end of the singlechip is respectively connected with the third control switch and the fourth control switch.
5. The dual-circuit powered electric energy meter control system of claim 2, wherein: the power module further comprises a battery unit, the output end of the ACDC converter is connected with the battery unit, and the battery unit is connected with the single chip microcomputer.
6. A dual circuit powered electricity meter control system according to any of claims 1-3, wherein: the control system further comprises a timing unit, and the timing unit is connected with the single chip microcomputer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921461137.1U CN210669620U (en) | 2019-09-04 | 2019-09-04 | Electric energy meter control system with double-loop power supply |
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| CN201921461137.1U CN210669620U (en) | 2019-09-04 | 2019-09-04 | Electric energy meter control system with double-loop power supply |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112615424A (en) * | 2020-12-25 | 2021-04-06 | 南京工业职业技术大学 | Temporary power supply state monitoring system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112615424A (en) * | 2020-12-25 | 2021-04-06 | 南京工业职业技术大学 | Temporary power supply state monitoring system and method |
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