CN201352235Y - Three-phase multifunctional electric energy meter - Google Patents

Three-phase multifunctional electric energy meter Download PDF

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Publication number
CN201352235Y
CN201352235Y CNU2009201319112U CN200920131911U CN201352235Y CN 201352235 Y CN201352235 Y CN 201352235Y CN U2009201319112 U CNU2009201319112 U CN U2009201319112U CN 200920131911 U CN200920131911 U CN 200920131911U CN 201352235 Y CN201352235 Y CN 201352235Y
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CN
China
Prior art keywords
phase
energy meter
electric energy
power
voltage
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Application number
CNU2009201319112U
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Chinese (zh)
Inventor
高伟
王志强
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深圳市森晖电子有限公司
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Priority to CNU2009201319112U priority Critical patent/CN201352235Y/en
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Publication of CN201352235Y publication Critical patent/CN201352235Y/en

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Abstract

The utility model discloses a three-phase multifunctional electric energy meter which comprises: a power supply system, a voltage sampling circuit and a current sampling circuit which are accessed to an electric fence and respectively sample a phase voltage and a phase current of the electric fence, a metering unit carrying out metering and calculating to the sampled phase voltage and phase current and connected with the voltage sampling circuit and the current sampling circuit, and an MCU controller charging the electric energy according to set time-sharing rate, carrying out accumulation and calculation to the obtained active electric energy and reactive electric energy and calculating the maximum demand, and judging whether loss of pressure or phase failure occurs, connected with the metering unit, and accessed to an LCD display, a memory, a real-time clock and a key. The electric energy meter has the advantages of simple structure and strong function, integrates partial functions of an active electric energy meter, a reactive electric energy meter, a maximum demand meter and an electric power parameter measuring instrument into a whole, is beneficial to the electric power users to improve the load situation, reduces electric energy consumption, and improves the efficiency of the electric fence.

Description

Three-phase multifunctional electrical energy meter

Technical field

The utility model relates to a kind of measuring appliance, especially relates to a kind of three-phase multifunctional electrical energy meter that is used for electric energy measurement and power network monitoring.

Background technology

Energy scarcity is a common recognition of current society, and energy savings, to cut the waste be necessary and urgent task at present, and utilizing economy and technological means is the effective ways that reach energy-conservation purpose.

Along with the social development power consumer increases in numbers swiftly, electric energy instrument quantity also increases thereupon fast, and this makes and has checked meter into a hard work.The increase of power consumer makes that also electric load increases fast, and the unbalanced problem of electricity consumption also becomes increasingly conspicuous, and electrical network be can't bear the heavy load in peak times of power consumption, the power cuts to limit consumption of having to; In the low power consumption phase, electric power is unmanned to be used, and causes supply voltage to raise, when serious even can damage power equipment.Some consumer moves under low power factor for a long time simultaneously, and reactive loss is big, and waste of energy is serious, causes the electrical network inefficiency.

Therefore, stabilize load and reduce loss, improve electrical network efficient, become the problem that electric power enterprise is needed solution badly.Traditional mechanical power energy meter function singleness can't address these problems; And electric multi-functional electric energy meter makes its cost high because function is too complicated, can not be used widely.

The utility model content

The utility model is to propose a kind of three-phase multifunctional electrical energy meter, is used for electric energy measurement and power network monitoring, improving present electric energy meter function singleness and the higher defective of cost, thereby improves electrical network efficient and work efficiency.

For solving technical matters of the present utility model, the utility model discloses a kind of three-phase multifunctional electrical energy meter, and it comprises: power-supply system; Insert electrical network and respectively to the voltage sample circuit and the current sampling circuit of electrical network phase voltage and phase current sampling; Phase voltage and phase current to sampling carry out calculating correction values, obtain the metering units of voltage, electric current, frequency, active power, reactive power, applied power, power factor, active energy and reactive energy data, it connects voltage sample circuit and current sampling circuit; Be used for electric energy being chargeed, the active energy that obtains and reactive energy being carried out cumulative calculation and calculate maximum demand, judge whether to take place the MCU controller of decompression or phase failure incident by the time-division charge rate that is provided with, it connects metering units, and inserts LCD display, storer, real-time clock and button.

Wherein, power-supply system comprises: the primary power that is used for just often providing to electric energy meter at line voltage working power; Being used for behind grid cut-off by the power management module switching controls, is the backup battery of real-time clock power supply; The power management module that connects primary power and backup battery simultaneously.

Wherein, voltage sample circuit is a resistor voltage divider circuit; Current sampling circuit is a current transformer.

In addition, described three-phase multifunctional electrical energy meter also comprises: be used for accuracy test or insert the impulse output circuit that other electric instrument measures electric energy, it is that photoelectricity is isolated output, inserts the MCU controller.

In addition, described three-phase multifunctional electrical energy meter also comprises: be used for the long-range remote communication interface that reads the electric energy meter data or the electric energy meter parameter is set, this remote communication interface inserts the MCU controller.

Wherein, remote communication interface is infrared interface or RS485 interface.

And described electric energy meter inserts electrical network with three-phase and four-line, and voltage sample circuit and current sampling circuit insert respectively among phase line A, phase line B and the phase line C, and zero line inserts metering units.Perhaps, electric energy meter inserts electrical network with phase three-wire three, and voltage sample circuit and current sampling circuit insert respectively among phase line A and the phase line C.

Compared with prior art, the utlity model has following beneficial effect:

The utility model is by metering units COMPREHENSIVE CALCULATING voltage and current sampled signal, obtain multinomial power consumption parameter and power supply parameters such as line voltage, frequency such as active energy, reactive energy, active power, reactive power, maximum demand, power factor, load current, and carry out comprehensive intelligent by the MCU controller and control, thereby can measure and write down multiple electricity consumption data and electrical network parameter, understanding the user load situation and improve power supply quality for the power supply enterprise front provides technological means; And the time-division charge rate function that the MCU controller provides can be impelled power consumer to change consumption habit, thereby reach the effect that peak load shifting is stabilized network load; In addition, the utility model uses RS485 interface or infrared interface to realize remote concentrated ammeter reading and parameter setting, is convenient to the electrical network situation is monitored in real time, increases work efficiency.Therefore, the utlity model has simple in structure and powerful advantage, integrate the partial function of active electric energy meter, reactive energy-meter, maximum demand meter and electric parameter measurement instrument, help power consumer and improve load state, reduce electric energy loss, improve electrical network efficient.

Description of drawings

Fig. 1 is the structural representation of the three-phase and four-line electric energy meter that the utility model proposes;

Fig. 2 is the structural representation of the three-phase three-wire electric energy meter that the utility model proposes

Embodiment

In conjunction with illustrated in figures 1 and 2, the three-phase simple multifunctional electric energy meter that the utility model proposes comprises: primary power 1; Backup battery 2; Primary power 1 and backup battery 2 are made the power management module 3 of handover management control; Insert the voltage sample circuit 4 and the current sampling circuit 5 of three phase network; Connect voltage sample circuit 4 and current sampling circuit 5, be used for carrying out the metering units 6 of electric energy metrical computing according to the sampling result of voltage sample circuit 4 and current sampling circuit 5; The MCU controller 8 that connects metering units 6, this MCU controller 8 inserts LCD display 7, storer 9, real-time clock 10, button 11, impulse output circuit 12, infrared interface 13 and RS485 interface 14.

Described voltage sample circuit 4 is a resistor voltage divider circuit; Described current sampling circuit 5 is a current transformer.Wherein, to the electric energy meter of three-phase and four-line as shown in Figure 1, wherein voltage sample circuit 4 and current sampling circuit 5 are connected on respectively on three-phase phase line A phase line, B phase line and the C phase line; And to the electric energy meter of phase three-wire three as shown in Figure 2, wherein voltage sample circuit 4 and current sampling circuit 5 are connected on respectively on the A phase line and C phase line in the three-phase phase line.

And tested voltage and current is taken a sample respectively by voltage sample circuit 4 and current sampling circuit 5, and sampled signal is sent into described metering units 6.6 pairs of sampled signals of described metering units carry out filtering, amplification, carry out A/D then and be converted to digital quantity, 6 pairs of digital quantity computings of described metering units draw voltage, electric current, frequency, active power, reactive power, applied power, power factor, active energy and reactive energy data.

Described MCU controller 8 reads measurement data from described metering units 6, and active energy and the reactive energy that obtains carried out cumulative calculation, and accumulative total electric energy result of calculation is stored in the storer 9 that is connected with MCU controller 8; 8 pairs of measurement data of described MCU controller are done further processing, calculate maximum demand, and are stored in described storer 9; The voltage and current that obtains is compared judgement, takes place, as detect decompression or the phase failure incident of taking place to have determined whether decompression or phase failure incident, then with relevant information records in described storer 9.

In addition, described MCU controller 8 can also be provided with time-division charge rate, supports 4 rates, 4 time zones, 12 holidays, 5 cover tariff period tables and can divide every day the time-division charge rate of 10 periods to move.Described real-time clock 10 switches base and calendar when providing for the period, and the leap year is adjusted automatically.

Described infrared interface 13 is used for communicating by letter with handheld reading meter device or Infrared remote controller, and by 13 pairs of electric energy meter parameters of described infrared interface with data are provided with and copy reading, infrared signal is the 38kHz modulation signal, and antijamming capability is strong, and communication distance is far away.

Described RS485 interface 14 is used for the telecommunication with main website, long-range copy reading electric energy meter data and the electric energy meter parameter is set.And carried out the photoelectricity isolation between other circuit of this described RS485 interface 14 and this electric energy meter inside, the damage of described RS485 interface 14 can not influence the function of other circuit.

Described LCD display 7 cooperates described button 11, can show measurement data and configuration parameter, and described LCD display has backlight, conveniently checks demonstration when insufficient light.Described impulse output circuit 12 is isolated output for photoelectricity, is used for accuracy test, also can insert other electric instrument metering electric energy.

At line voltage just often, working power is provided by described primary power 1; Behind the grid cut-off, described power management module 3 switches to described backup battery 2 with working power, and electric energy meter enters dormant state simultaneously, and described backup battery 2 is kept described real-time clock 10 operations; After described button 11 or infrared waking up, described LCD display 7 can video data, and this moment can the copy reading data by described infrared interface 13.After operation was finished, described LCD display 7 was closed, and reenters dormant state.Described MCU controller 8 can be monitored the capacity of described backup battery 2, provides warning message when described backup battery 2 off-capacities, so that the user in time changes.

The measuring accuracy calibration of the electric energy meter that the utility model proposes is adopted software algorithm and is cooperated correcting device to come auto-adjustment, there is not traditional hardware short circuit point, so error is difficult for drift, stop the generation of the unacceptable product that manually-operated causes, improved calibration efficient simultaneously.And the key parameter of electric energy meter and The data register, storer checking algorithm are stored respectively, ensure correctness.

Claims (10)

1, a kind of three-phase multifunctional electrical energy meter is characterized in that comprising:
Power-supply system;
Insert electrical network and respectively to the voltage sample circuit (4) and the current sampling circuit (5) of electrical network phase voltage and phase current sampling;
Phase voltage and phase current to sampling carry out calculating correction values, obtain the metering units (6) of voltage, electric current, frequency, active power, reactive power, applied power, power factor, active energy and reactive energy data, it connects voltage sample circuit (4) and current sampling circuit (5);
Be used for electric energy being chargeed, the active energy that obtains and reactive energy being carried out cumulative calculation and calculate maximum demand, judge whether to take place the MCU controller (8) of decompression or phase failure incident by the time-division charge rate that is provided with, it connects metering units (6), and inserts LCD display (7), storer (9), real-time clock (10) and button (11).
2, according to the described three-phase multifunctional electrical energy meter of claim 1, it is characterized in that power-supply system comprises:
Be used for just often providing the primary power (1) of working power to electric energy meter at line voltage;
Being used for behind grid cut-off by power management module (3) switching controls, is the backup battery (2) of real-time clock (10) power supply;
The power management module (3) that connects primary power (1) and backup battery (2) simultaneously.
According to the described three-phase multifunctional electrical energy meter of claim 1, it is characterized in that 3, voltage sample circuit (4) is a resistor voltage divider circuit.
According to the described three-phase multifunctional electrical energy meter of claim 1, it is characterized in that 4, current sampling circuit (5) is a current transformer.
5, according to the described three-phase multifunctional electrical energy meter of claim 1, it is characterized in that, also comprise: be used for accuracy test or insert the impulse output circuit (12) that other electric instrument measures electric energy, it is that photoelectricity is isolated output, inserts MCU controller (8).
6, according to the described three-phase multifunctional electrical energy meter of claim 1, it is characterized in that, also comprise: be used for the long-range remote communication interface that reads the electric energy meter data or the electric energy meter parameter is set, this remote communication interface inserts MCU controller (8).
According to the described three-phase multifunctional electrical energy meter of claim 6, it is characterized in that 7, remote communication interface is for inserting the infrared interface (13) of MCU controller (8).
According to the described three-phase multifunctional electrical energy meter of claim 6, it is characterized in that 8, remote communication interface is for inserting the RS485 interface (14) of MCU controller (8).
9, according to any one described three-phase multifunctional electrical energy meter of claim 1 to 8, it is characterized in that, this electric energy meter inserts electrical network with three-phase and four-line, and voltage sample circuit (4) and current sampling circuit (5) insert respectively among phase line A, phase line B and the phase line C, and zero line inserts metering units (6).
10, according to any one described three-phase multifunctional electrical energy meter of claim 1 to 8, it is characterized in that this electric energy meter inserts electrical network with phase three-wire three, voltage sample circuit (4) and current sampling circuit (5) insert respectively among phase line A and the phase line C.
CNU2009201319112U 2009-05-18 2009-05-18 Three-phase multifunctional electric energy meter CN201352235Y (en)

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Application Number Priority Date Filing Date Title
CNU2009201319112U CN201352235Y (en) 2009-05-18 2009-05-18 Three-phase multifunctional electric energy meter

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101893668A (en) * 2010-06-24 2010-11-24 福建师范大学 Three-phase three-wire and three-phase four-wire compatible electrical parameter signal measurement and process system
CN102680896A (en) * 2012-06-06 2012-09-19 深圳市海亿达能源科技股份有限公司 Motor management device with online energy efficiency monitoring function and monitoring method thereof
CN102735922A (en) * 2012-07-04 2012-10-17 江苏林洋电子股份有限公司 Low-cost single-phase harmonic electric energy meter
CN102879619A (en) * 2012-09-07 2013-01-16 上海申瑞继保电气有限公司 Method for identifying full-scale jump of active electric measure
CN102928659A (en) * 2012-11-06 2013-02-13 昆山北极光电子科技有限公司 High-precision power measuring circuit
CN103197138A (en) * 2013-02-22 2013-07-10 王金泽 Intelligent electric meter with function of detecting power supply reliability and voltage qualified rate and detecting method thereof
CN103630740A (en) * 2012-08-27 2014-03-12 成都众山科技有限公司 Three-phase electric energy metering system
CN103728489A (en) * 2012-10-16 2014-04-16 苏州工业园区新宏博通讯科技有限公司 High-voltage direct current meter
CN103777071A (en) * 2012-10-26 2014-05-07 苏州工业园区新宏博通讯科技有限公司 High voltage DC electric energy meter
CN104316114A (en) * 2014-11-21 2015-01-28 国家电网公司 Intensive type touch screen intelligent power meter
CN104678159A (en) * 2013-11-28 2015-06-03 哈尔滨市三和佳美科技发展有限公司 Industrial three-phase isolation ampere meter
CN104865440A (en) * 2015-06-01 2015-08-26 中国科学院电工研究所 Intelligent electric power router DC unit resonance parameter testing method
CN104914304A (en) * 2015-06-25 2015-09-16 烟台东方威思顿电气股份有限公司 Electric energy accurate measurement method and electric energy accurate measurement device under fluctuating load

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101893668A (en) * 2010-06-24 2010-11-24 福建师范大学 Three-phase three-wire and three-phase four-wire compatible electrical parameter signal measurement and process system
CN102680896A (en) * 2012-06-06 2012-09-19 深圳市海亿达能源科技股份有限公司 Motor management device with online energy efficiency monitoring function and monitoring method thereof
CN102735922A (en) * 2012-07-04 2012-10-17 江苏林洋电子股份有限公司 Low-cost single-phase harmonic electric energy meter
CN102735922B (en) * 2012-07-04 2014-07-23 江苏林洋电子股份有限公司 Low-cost single-phase harmonic electric energy meter
CN103630740A (en) * 2012-08-27 2014-03-12 成都众山科技有限公司 Three-phase electric energy metering system
CN102879619A (en) * 2012-09-07 2013-01-16 上海申瑞继保电气有限公司 Method for identifying full-scale jump of active electric measure
CN102879619B (en) * 2012-09-07 2015-04-01 上海申瑞继保电气有限公司 Method for identifying full-scale jump of active electric measure
CN103728489A (en) * 2012-10-16 2014-04-16 苏州工业园区新宏博通讯科技有限公司 High-voltage direct current meter
CN103777071A (en) * 2012-10-26 2014-05-07 苏州工业园区新宏博通讯科技有限公司 High voltage DC electric energy meter
CN102928659A (en) * 2012-11-06 2013-02-13 昆山北极光电子科技有限公司 High-precision power measuring circuit
CN103197138A (en) * 2013-02-22 2013-07-10 王金泽 Intelligent electric meter with function of detecting power supply reliability and voltage qualified rate and detecting method thereof
CN103197138B (en) * 2013-02-22 2015-09-23 王金泽 A kind of intelligent electric meter and monitoring method with power supply reliability and rate of qualified voltage monitoring function
CN104678159A (en) * 2013-11-28 2015-06-03 哈尔滨市三和佳美科技发展有限公司 Industrial three-phase isolation ampere meter
CN104316114A (en) * 2014-11-21 2015-01-28 国家电网公司 Intensive type touch screen intelligent power meter
CN104865440A (en) * 2015-06-01 2015-08-26 中国科学院电工研究所 Intelligent electric power router DC unit resonance parameter testing method
CN104914304A (en) * 2015-06-25 2015-09-16 烟台东方威思顿电气股份有限公司 Electric energy accurate measurement method and electric energy accurate measurement device under fluctuating load
CN104914304B (en) * 2015-06-25 2017-08-18 烟台东方威思顿电气有限公司 Electric energy accurate measurement method and metering device under a kind of fluctuating load

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20091125

Termination date: 20130518

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