CN104730334A - Electric energy metering method based on dynamic switching input signal - Google Patents
Electric energy metering method based on dynamic switching input signal Download PDFInfo
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- CN104730334A CN104730334A CN201310694286.3A CN201310694286A CN104730334A CN 104730334 A CN104730334 A CN 104730334A CN 201310694286 A CN201310694286 A CN 201310694286A CN 104730334 A CN104730334 A CN 104730334A
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Abstract
The invention discloses an electric energy metering method based on a dynamic switching input signal. The method comprises the following steps: a voltage transformer and a current transformer respectively acquire a voltage signal and a current signal from a current operation branch of equipment and transmit the voltage signal and the current signal to an electric energy metering unit; the electric energy metering unit records the electric energy on the current operation branch; a dynamic switching input signal is sent to a main control unit after the operation branch of the equipment is switched, the main control unit receives the signal and sends a switching command to a switching unit, the switching unit switches the electric energy metering unit to a secondary side of the voltage transformer and the current transformer on the current operation branch of the equipment, and the electric energy metering unit records the electric energy on the current operation branch; and the electric energy metering unit transmits an electric energy record to an operation unit, and the operation unit accumulates electric energy of the equipment on each operation branch to obtain the electric energy consumption value of the equipment in the metering cycle. By adopting the method, electric energy of multi-branch power supply equipment can be metered conveniently, the metering cost is reduced, and the accuracy and reliability of equipment electric energy metering are improved.
Description
Technical field
The present invention relates to a kind of electric energy gauging method based on switching at runtime input signal.
Background technology
Along with the development of modern industrial technology, the power supply mode of equipment there occurs great variety, brings new challenge to traditional way of energy measuring.Traditional equipment electric power system is comparatively simple, how to be powered by a branch road, only need install a set of electric energy metered system on this branch road, just the power consumption of energy accurate-metering equipment.
Along with the raising required equipment dependability, and converter technique is universal, the large more options multiple branch circuit of much important commercial unit is powered, and guarantees that equipment can operate in different patterns according to demand, improve the reliability of equipment simultaneously, but also for electric energy metered system brings a difficult problem.Electric energy metered system traditionally, needs to install electric energy meter respectively on each branch road, then fetches data by control system from every block electric energy meter, add up, draw the power consumption of equipment.So both cause the waste that electric energy meter uses, turn increase the burden of control system Communication Card, improve measuring cost, there is very large limitation.Traditional electric energy metered system does not have switching at runtime input signal function, is only applicable to the equipment that single spur track is powered, and cannot be applied to the electric energy metrical of multiple branch circuit power-supply unit.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of electric energy gauging method based on switching at runtime input signal, this method overcomes the defect of traditional electric energy metered system, conveniently electric energy metrical is implemented for multiple branch circuit power-supply unit, reduce measuring cost, improve accuracy and the reliability of equipment electric energy metrical.
For solving the problems of the technologies described above, the electric energy gauging method that the present invention is based on switching at runtime input signal comprises the steps:
Step one, voltage transformer (VT) summation current transformer obtain voltage and current signal from the current operation branch road of equipment and transfer to electric energy metrical unit respectively, and electric energy metrical unit record device is at the electric energy of current operation branch road;
Switching at runtime input signal is sent to main control unit after step 2, equipment switchover operation branch road, main control unit judges whether to meet switching condition after accepting switching at runtime input signal, if meet switching condition main control unit to send switching command to switch unit, electric energy metrical unit is switched to the voltage transformer (VT) summation current transformer secondary side of the current operation branch road of equipment by switch unit, and the voltage transformer (VT) summation current transformer signal of electric energy metrical unit accepting device current operation branch road is also recorded in the electric energy of current operation branch road;
Equipment is transferred to arithmetic element at the electric energy recording of each operation branch road by step 3, electric energy metrical unit, makes equipment after the electric energy of each operation branch road adds up, obtain the electric energy power consumption values of equipment in metering cycle by arithmetic element.
Further, above-mentioned electric energy metrical unit is connected by communication bus with between arithmetic element.
Further, above-mentioned electric energy metrical unit is active watt-hour meter.
Further, above-mentioned switch unit is relay group, and each coil of described relay group controls electric by main control unit and dead electricity, each contact are serially connected with the voltage transformer (VT) summation current transformer secondary side of each branch road respectively and between the voltage input end of electric energy metrical unit and current input terminal.
Because the electric energy gauging method that the present invention is based on switching at runtime input signal have employed technique scheme, namely this method is obtained voltage and current signal and transfers to electric energy metrical unit from the current operation branch road of equipment by voltage transformer (VT) summation current transformer respectively, and electric energy metrical unit record is at the electric energy of current operation branch road; Switching at runtime input signal is sent to main control unit after equipment switchover operation branch road, main control unit acknowledge(ment) signal Backward handoff unit sends switching command, electric energy metrical unit is switched to the voltage transformer (VT) summation current transformer secondary side of the current operation branch road of equipment by switch unit, and electric energy metrical unit record is at the electric energy of current operation branch road; Equipment is transferred to arithmetic element at the electric energy recording of each operation branch road by electric energy metrical unit, makes equipment after the electric energy of each operation branch road adds up, obtain the electric energy power consumption values of equipment in metering cycle by arithmetic element.This method overcomes the defect of traditional electric energy metered system, conveniently implements electric energy metrical, reduce measuring cost for multiple branch circuit power-supply unit, improves accuracy and the reliability of equipment electric energy metrical.
Accompanying drawing explanation
Below in conjunction with drawings and embodiments, the present invention is described in further detail:
Fig. 1 is the theory diagram of the electric energy gauging method that the present invention is based on switching at runtime input signal;
Fig. 2 is the physical circuit realizing this method.
Embodiment
As shown in Figure 1, the electric energy gauging method that the present invention is based on switching at runtime input signal comprises the steps:
Step one, voltage transformer (VT) summation current transformer obtain voltage and current signal from the current operation branch road of equipment and transfer to electric energy metrical unit 1 respectively, and electric energy metrical unit 1 recording unit is at the electric energy of current operation branch road;
Switching at runtime input signal is sent to main control unit 2 after step 2, equipment switchover operation branch road, main control unit 2 judges whether to meet switching condition after accepting switching at runtime input signal, if meet switching condition main control unit 2 to send switching command to switch unit 3, electric energy metrical unit 1 is switched to the voltage transformer (VT) summation current transformer secondary side of the current operation branch road of equipment by switch unit 3, and the voltage transformer (VT) summation current transformer signal of electric energy metrical unit 1 accepting device current operation branch road is also recorded in the electric energy of current operation branch road;
Equipment is transferred to arithmetic element 4 at the electric energy recording of each operation branch road by step 3, electric energy metrical unit 1, makes equipment after the electric energy of each operation branch road adds up, obtain the electric energy power consumption values of equipment in metering cycle by arithmetic element 4.
Further, above-mentioned electric energy metrical unit 1 is connected by communication bus with between arithmetic element 4.
Further, above-mentioned electric energy metrical unit 1 is active watt-hour meter.
Further, above-mentioned switch unit 3 is relay groups, and each coil of described relay group controls electric by main control unit 2 and dead electricity, each contact are serially connected with the voltage transformer (VT) summation current transformer secondary side of each branch road respectively and between the voltage input end of electric energy metrical unit 1 and current input terminal.
As shown in Figure 2, switch unit is made up of relay K 1 and relay K 2, normally opened contact K11, K12 and K13 of relay K 1 are serially connected with between the voltage transformer pt 1 summation current transformer CT1 of the first operation branch road 5 and electric energy metrical unit 1 respectively, normally closed contact K14, K15 and K16 of relay K 1 are serially connected with between the voltage transformer pt 2 summation current transformer CT2 of the second operation branch road 6 and electric energy metrical unit 1 respectively, and the normally closed contact K21 of relay K 2, normally opened contact K22 are serially connected with the secondary side of Current Transmit 1 summation current transformer CT2 respectively, original state equipment runs branch road 6 second and runs, and the Signal transmissions of voltage transformer pt 2 summation current transformer CT2 records electric energy to electric energy metrical unit 1, switching at runtime input signal is sent to main control unit when equipment switches to the first operation branch road 5, the coil of main control unit engage relay K1 and relay K 2, relay K 1 and relay K 2 energized action, the Signal transmissions of voltage transformer pt 1 summation current transformer CT1 is recorded electric energy to electric energy metrical unit 1, connection between off voltage mutual inductor PT2 summation current transformer CT2 and electric energy metrical unit 1, the contact of relay K 2 prevents Current Transformer Secondary side open circuit in handoff procedure simultaneously, play a protective role in the handoff procedure of current transformer, when Dang You mono-road power switching is powered to another road, main control unit is first by Current Transformer Secondary side short circuit to be retired, after main control unit confirms that current transformer two ends to be retired are in short-circuit condition, just can control this current transformer exit status, in metering cycle, the data of electric energy metrical unit 1 transfer to through communication bus the electric energy power consumption values that arithmetic element obtains equipment.
This method overcomes the defect of traditional electric energy metered system, convenient enforcement is by the electric energy metrical of multiple branch circuit power-supply unit, without the need to installing the Communication Card of electric energy meter and increase control system respectively at each branch road, reduce measuring cost, improve accuracy and the reliability of equipment electric energy metrical.
Claims (4)
1., based on an electric energy gauging method for switching at runtime input signal, it is characterized in that this method comprises the steps:
Step one, voltage transformer (VT) summation current transformer obtain voltage and current signal from the current operation branch road of equipment and transfer to electric energy metrical unit respectively, and electric energy metrical unit record device is at the electric energy of current operation branch road;
Switching at runtime input signal is sent to main control unit after step 2, equipment switchover operation branch road, main control unit judges whether to meet switching condition after accepting switching at runtime input signal, if meet switching condition main control unit to send switching command to switch unit, electric energy metrical unit is switched to the voltage transformer (VT) summation current transformer secondary side of the current operation branch road of equipment by switch unit, and the voltage transformer (VT) summation current transformer signal of electric energy metrical unit accepting device current operation branch road is also recorded in the electric energy of current operation branch road;
Equipment is transferred to arithmetic element at the electric energy recording of each operation branch road by step 3, electric energy metrical unit, makes equipment after the electric energy of each operation branch road adds up, obtain the electric energy power consumption values of equipment in metering cycle by arithmetic element.
2. the electric energy gauging method based on switching at runtime input signal according to claim 1, is characterized in that: described electric energy metrical unit is connected by communication bus with between arithmetic element.
3. the electric energy gauging method based on switching at runtime input signal according to claim 1 and 2, is characterized in that: described electric energy metrical unit is active watt-hour meter.
4. the electric energy gauging method based on switching at runtime input signal according to claim 3, it is characterized in that: described switch unit is relay group, each coil of described relay group controls electric by main control unit and dead electricity, each contact are serially connected with the voltage transformer (VT) summation current transformer secondary side of each branch road respectively and between the voltage input end of electric energy metrical unit and current input terminal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310694286.3A CN104730334A (en) | 2013-12-18 | 2013-12-18 | Electric energy metering method based on dynamic switching input signal |
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| CN201310694286.3A CN104730334A (en) | 2013-12-18 | 2013-12-18 | Electric energy metering method based on dynamic switching input signal |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106501761A (en) * | 2016-12-26 | 2017-03-15 | 烟台东方威思顿电气股份有限公司 | Three-phase intelligent electric-energy meter simulation detection system |
| CN111537792A (en) * | 2020-05-19 | 2020-08-14 | 广东电网有限责任公司东莞供电局 | Multi-power-supply electricity metering device and method |
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| CN102692559A (en) * | 2012-06-19 | 2012-09-26 | 上海贝电实业（集团）股份有限公司 | Multi-path collecting method of smart ammeter |
| CN202710744U (en) * | 2012-08-14 | 2013-01-30 | 河南弘正电气科技有限公司 | Main station structure of station electrical energy metering device monitoring management system |
| US20130057255A1 (en) * | 2010-05-18 | 2013-03-07 | Wuhan Guoce Science & Technology Co., Ltd. | Integrated device suspended at high voltage potential for power energy metering and protection of distribution network |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130057255A1 (en) * | 2010-05-18 | 2013-03-07 | Wuhan Guoce Science & Technology Co., Ltd. | Integrated device suspended at high voltage potential for power energy metering and protection of distribution network |
| CN102692559A (en) * | 2012-06-19 | 2012-09-26 | 上海贝电实业（集团）股份有限公司 | Multi-path collecting method of smart ammeter |
| CN202710744U (en) * | 2012-08-14 | 2013-01-30 | 河南弘正电气科技有限公司 | Main station structure of station electrical energy metering device monitoring management system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106501761A (en) * | 2016-12-26 | 2017-03-15 | 烟台东方威思顿电气股份有限公司 | Three-phase intelligent electric-energy meter simulation detection system |
| CN111537792A (en) * | 2020-05-19 | 2020-08-14 | 广东电网有限责任公司东莞供电局 | Multi-power-supply electricity metering device and method |
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Application publication date: 20150624 |