CN103941082A - High-voltage electric energy direct metering device and method with double-channel data redundancy - Google Patents
High-voltage electric energy direct metering device and method with double-channel data redundancy Download PDFInfo
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- CN103941082A CN103941082A CN201410140530.6A CN201410140530A CN103941082A CN 103941082 A CN103941082 A CN 103941082A CN 201410140530 A CN201410140530 A CN 201410140530A CN 103941082 A CN103941082 A CN 103941082A
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Abstract
The invention discloses a high-voltage electric energy direct metering device with double-channel data redundancy. The high-voltage electric energy direct metering device with double-channel data redundancy comprises two current signal sensors, two metal shielding boxes and two voltage signal sensors. A high-voltage metering device which is composed of a working power supply, an electric energy metering unit and a communication module is arranged in each metal shielding box. The current signal sensors and the voltage signal sensors are both connected with the two electric energy metering units. The two electric energy metering units are connected through an optical fiber. Each working power supply is connected with the corresponding voltage signal sensor and the corresponding electric energy metering unit. Each electric energy metering unit transmits data to a display terminal through a communication module. The invention further discloses a high-voltage electric energy direct metering method with double-channel data redundancy. The high-voltage electric energy direct metering device with double-channel data redundancy is smaller in size, smaller in occupied area and simpler in structure; in addition, more materials are saved, the production cost of a high-voltage body is reduced, communication is more reliable and safer, and data are stored repeatedly, so that data are not prone to being lost.
Description
Technical field
The invention belongs to Electric Energy Metering Technology field, be specifically related to a kind of high pressure three-phase electric energy metering device and method, specially refer to a kind of noble potential metering and there is the electric power meter of communication redundancy feature between data redundancy and high-low pressure.
Background technology
Present existing high voltage electric energy gauging method has a variety of, is roughly divided into following three classes, but all has some problems:
The first kind, becomes general low-voltage, little electric current (for example: 100 volts of rated voltages, rated current 5 is pacified or 1A) with traditional electromagnetic type electric current, voltage transformer (VT) by high voltage, large current reduction respectively, then carries out electric energy metrical with low-voltage electric energy table.The advantage of this technology is: it is a kind of technology of classics, constant product quality.Its shortcoming mainly contains: expend lot of materials particularly non-ferrous metal, cannot overall inspection error, easily there is ferroresonance accident, the accuracy of measuring is low, the same current transformer of low-pressure meter meter, voltage transformer (VT) separate, easily there is wiring error, cause electric weight incorrect posting, error of omission.Particularly be not easy to avoid the generation of stealing activity.
Equations of The Second Kind, with the alternative traditional electromagnetic type mutual inductor of unconventional voltage and current signal transducer, forms electric power meter together with low-voltage electric energy table.Many present high-voltage electric energy meters just use this principle to make.The feature of this class technology is, signals collecting, the data processing of electric energy metrical and communicating by letter all completes in low-pressure side.Its advantage is electric current, voltage signal sensor miniaturization, and sensor and low-voltage electric energy table integrated, this can save material and reduce volume.Its shortcoming is, this technology is the same with traditional know-why in itself.Technology does not have essential progress, and data are easily lost.
The third, be placed in hot end by non-traditional electric current, voltage signal sensor, obtains the voltage and current signal of A, B, C three-phase in high-pressure side.The electric energy metrical unit that uses computer chip to become with electronics configuration, carries out signal processing and calculating at hot end to each phase current, voltage respectively, obtains the electric flux of every phase.Finally, three-phase electric flux separately is always added and obtains three-phase electric energy metering result.The principal feature of this technology is: signals collecting, the data processing of electric energy metrical and communicating by letter all completes in high-pressure side.It can significantly save metal material, is easy to realize integral verification, obtains global error.Its shortcoming is: three-phase electric energy metering is to conduct to B by the electric energy metrical carrying out separately mutually at A, C always to do and added mutually.This will cause the increase of alternate optical-fiber communication channel.Except increasing manufacturing cost, this structure also can increase the fault rate of high-voltage electric energy meter.
More than measure according to so-called " genuine standard ".To central point isolated neutral system, can also utilize " two meter technique " to complete three-phase electric energy metering.The principal feature of this technology is: use less current transformer, voltage transformer (VT) and a metering units, more save metal material than genuine standard.
Number of patent application is that " high voltage electric energy direct metered system and method " current acquisition module of 200810002310.1 lays respectively at A, C phase, with A, C same potential, metering units is divided into two parts, lays respectively at A, C phase, then comprehensively add up mutually at B, and with low pressure terminal communication.This scheme is to adopt single and data only to store once, once the communicating interrupt data that occur between high-low pressure just transmit not get off.
Summary of the invention
The object of the invention is to solve above-mentioned technical matters, a kind of direct measuring apparatus of high voltage electric energy of binary channels data redundancy is provided.At A, C two-phase measuring voltage, electric current and phase-splitting electric energy, then data are passed to the other side respectively, data obtain closing after phase electric energy through processing always to add, and two-phase to low pressure end transmission data, is guaranteed binary channels transmission respectively, and metering is all carried out at noble potential with data processing.Thereby the problem and shortage of avoiding existing electric energy gauging method to exist.
The present invention is achieved in that
A kind of direct measuring apparatus of high voltage electric energy of binary channels data redundancy, comprise two current signal sensor, two metal shielding boxes and two voltage signal sensor, in metal shielding box, it is the high-voltage metering device being formed by working power, electric energy metrical unit and communication module, current signal sensor is all connected with electric energy metrical unit with voltage signal sensor, between two electric energy metrical unit, connects by optical fiber; Working power is connected with voltage signal sensor and electric energy metrical unit respectively; Electric energy metrical unit transfers data to display terminal by communication module.
Further scheme is: the direct measuring apparatus of high voltage electric energy of described binary channels data redundancy is arranged on an insulation crust inside, and insulation crust inside is filled with insulating material.
Further scheme is: described communication module by optical fiber, wireless, infrared or GPRS or its combination of transmitted data to display terminal.
Further scheme is: described voltage signal sensor is used electromagnetic potential transformer, or uses non-ferromagnetic type sensor.
Further scheme is: described non-ferromagnetic type sensor is capacitive transducer or electric resistance sensor or resistive-capacitive sensor.
Another object of the present invention is to provide a kind of direct metering method of high voltage electric energy of binary channels data redundancy, specific as follows:
The direct metering method of high voltage electric energy of binary channels data redundancy, is used the direct measuring apparatus of high voltage electric energy of aforesaid binary channels data redundancy, and specifically comprises:
Be defined as mutually specifying the B of phase, three-phase alternating current to be defined as mutually benchmark phase with C the A phase of three-phase alternating current, adopt two meter technique principle to measure the method for three-phase electric energy, measure three-phase electricity energy in high-pressure side, concrete steps are as follows:
Step 1, electric energy metrical unit use A, C biphase current as current input signal;
Step 2, electric energy metrical unit use AB, BC voltage between phases as voltage input signal;
Step 3, two electric energy metrical cell operation are under noble potential, and the reference potential point using the current potential of A phase and the current potential of C phase as work respectively, gathers electric current and voltage signal, calculates the electric flux of phase-splitting separately;
Step 4, two electric energy metrical unit are passed to the data that calculate respectively by optical fiber the electric energy metrical unit of offside;
Step 5, receiving after the data of offside, two electric energy metrical unit are for further processing to data respectively, obtain needed phase electric flux and other electric parameters of closing;
Adopt the method for two-way collection, two-way calculating to reach data redundancy object, A phase metering units and C phase metering units calculate respectively and close phase energy data;
Step 6, two electric energy metrical unit are stored these electric parameters, utilize communication channel separately that continuous data is imported in display terminal simultaneously, realize the redundancy of communication channel between high-low pressure.
Further scheme is: record voltage between phases signal in high-pressure side by voltage signal sensor; Record the current signal of A phase and C phase by current signal sensor, the output signal of voltage signal sensor and current signal sensor is delivered to the metering units of A, C phase.
Further scheme is: described current signal sensor is arranged on the noble potential of A phase and C phase, and its input current and secondary output current are equipotential; The secondary output voltage of voltage signal sensor is to lay respectively on the noble potential of A phase and C phase.
Further scheme is: described electric energy metrical unit is main metering units and submeter unit each other, two electric energy metrical unit are being received after the output signal of this side voltage signal sensor and current signal sensor, carry out the calculating of this side voltage, electric current and phase-splitting electric energy, the data that calculate are passed to respectively to the electric energy metrical unit of offside by optical fiber; Receiving after the data of offside, two electric energy metrical unit are for further processing to data respectively, obtain needed phase electric flux and other electric parameters of closing; These electric parameters are passed to respectively the display terminal of low-pressure side in storing on the spot by communication module.
Further scheme is: described appointment is A phase and B phase mutually, and benchmark is C phase mutually; Or specifying is B phase and C phase mutually, and benchmark is A phase mutually.
The present invention can be packaged together them, forms an integrated single unit system.Also can encapsulate respectively and be fabricated to two or three splits, when in use they are connected to become to a single unit system.
Advantage of the present invention:
1. adopt integrated frame mode, be more conducive to user's installation; Integrated metering device has greatly reduced the use of metal, makes not only light but also low-carbon environment-friendly of device, has significantly saved manufacturing cost;
2. adopt binary channels calculating, storage means to reach the object of data redundancy, make the safer more easily recovery of data;
3. adopt binary channels communication mode, make communication more reliable, be more difficult for being affected by the external environment, reduce the generation of communication accident;
4. electric current, voltage signal acquisition part are encapsulated in the metal shielding box of noble potential with electric energy metrical unit, working power together with communication module.Object is to improve the anti-electromagnetic interference capability of device. ensure and improve the High-Voltage Insulation level of each parts and device.
The present invention is compared with prior art:
Device volume of the present invention less, take up room littlely, structure is simpler;
2. save more materials.Reduce high pressure body production cost;
3. communication is more reliably safer;
4. Data duplication is preserved, and data are difficult for losing.
Brief description of the drawings
Fig. 1 is electrical principle block diagram of the present invention;
Fig. 2 is structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described further.
As shown in attached Fig. 1 and 2, in high pressure three-phase alternating current, our selected A phase and C mutually as specifying phase, using B as benchmark phase.In A phase and C, current signal sensor La, Lc, electric energy metrical unit Ja, Jc, working power Da, Dc, communication module Ta, Tc are housed respectively mutually, voltage signal sensor Xab is housed between AB phase voltage, voltage signal sensor Xbc is housed between BC phase voltage, and the output signal of current signal sensor and voltage signal sensor accesses respectively electric energy metrical unit Ja, Jc.
After current signal and voltage signal are all inputted electric energy metrical unit separately, electric energy metrical unit Ja, Jc carry out data processing, the A module Ta that communicates imports the data of handling well into C phase, the C module Tc that communicates imports the data of handling well into A phase, then each metering units Ja, Jc carry out electric energy stack again, finally adopt twin-channel pattern to import data into display terminal or other metering systems.
Voltage between phases signal transducer Xab, Xbc can use electromagnetic potential transformer, also can use non-ferromagnetic type sensor, as capacitive transducer or electric resistance sensor or resistive-capacitive sensor; The secondary coil of electromagnetic potential transformer is in respectively on the noble potential of A phase and C phase.
The working power of electric energy metrical unit is supplied with by voltage between phases signal transducer Xab, Xbc.
Electric energy metrical unit Ja, Jc, working power Da, Dc and communication module Ta, Tc are encapsulated in metal shielding box Sa, a Sc, high-voltage electromagnetic field is shielded, weaken or avoid interference and the impact of high-voltage electromagnetic field on these parts and circuit thereof.
Utilize insulating material Y to be encapsulated in W in an insulation crust current signal sensor La, Lc, voltage signal sensor Xab, Xbc, electric energy metrical unit Ja, Jc, working power Da, Dc and communication module Ta, Tc, metal shielding box Sa, Sc, form the electric power meter of a high voltage direct access.
The invention is not restricted to taking A phase and C mutually as specifying phase, B mutually as benchmark phase, can A phase be also benchmark phase for specifying phase, C with B mutually mutually, or B phase and C are that appointment phase, A are benchmark phase mutually.
As shown in Figure 2, in the present invention program and in the device of making accordingly, sensor, electric energy metrical unit are all on the noble potential of specifying phase.So Electric energy measurement need to be delivered to electronegative potential by communication and also not discharge device or the network that other noble potential is specified, and offers the person of needs of Electric energy measurement.The table body of hot end can use and include but not limited to that optical fiber, wireless, infrared and GPRS complete and communicate by letter with the specified device of cold end or network as telecommunication media, metering and the measurement result of electric flux and other electric parameters are mail to object, thereby complete the communication transmission of metering result from hot end to cold end.
As shown in Figure 2, the measuring apparatus of the present invention program and formation thereof is by voltage signal sensor, current signal sensor and electric energy metrical cell formation.They can be packaged together, form an integrated single unit system.Also can encapsulate respectively and be fabricated to two or three splits, when in use they are connected to become to a single unit system.
Claims (10)
1. the direct measuring apparatus of high voltage electric energy of a binary channels data redundancy, it is characterized in that: comprise two current signal sensor, two metal shielding boxes and two voltage signal sensor, in metal shielding box, it is the high-voltage metering device being formed by working power, electric energy metrical unit and communication module, current signal sensor is all connected with electric energy metrical unit with voltage signal sensor, between two electric energy metrical unit, connects by optical fiber; Working power is connected with voltage signal sensor and electric energy metrical unit respectively; Electric energy metrical unit transfers data to display terminal by communication module.
2. the direct measuring apparatus of high voltage electric energy of binary channels data redundancy according to claim 1, it is characterized in that: the direct measuring apparatus of high voltage electric energy of described binary channels data redundancy is arranged on an insulation crust inside, and insulation crust inside is filled with insulating material.
3. the direct measuring apparatus of high voltage electric energy of binary channels data redundancy according to claim 1, is characterized in that: described communication module by wireless or the infrared or GPRS of optical fiber or their combination of transmitted data to display terminal.
4. the direct measuring apparatus of high voltage electric energy of binary channels data redundancy according to claim 1, is characterized in that: described voltage signal sensor is used electromagnetic potential transformer, or uses non-ferromagnetic type sensor; Described current signal sensor is used the current transformer of electromagnetic type, or low power consumption current mutual inductor.
5. the direct measuring apparatus of high voltage electric energy of binary channels data redundancy according to claim 4, is characterized in that: described non-ferromagnetic type sensor is capacitive transducer or electric resistance sensor or resistive-capacitive sensor.
6. the direct metering method of high voltage electric energy of binary channels data redundancy, is characterized in that: use the direct measuring apparatus of high voltage electric energy of the binary channels data redundancy as described in claim as arbitrary in claim 1-5, and specifically comprise:
Be defined as mutually specifying the B of phase, three-phase alternating current to be defined as mutually benchmark phase with C the A phase of three-phase alternating current, measure three-phase electricity energy in high-pressure side, concrete steps are as follows:
Step 1, electric energy metrical unit use A, C biphase current as current input signal;
Step 2, electric energy metrical unit use AB, BC voltage between phases as voltage input signal;
Step 3, two electric energy metrical cell operation are under noble potential, and the reference potential point using the current potential of A phase and the current potential of C phase as work respectively, gathers electric current and voltage signal, calculates the electric flux of phase-splitting separately;
Step 4, two electric energy metrical unit are passed to the data that calculate respectively by optical fiber the electric energy metrical unit of offside;
Step 5, receiving after the data of offside, two electric energy metrical unit are for further processing to data respectively, obtain needed phase electric flux and other electric parameters of closing;
Adopt the method for two-way collection, two-way calculating to reach data redundancy object, A phase metering units and C phase metering units calculate respectively and close phase energy data;
Step 6, two electric energy metrical unit are stored these electric parameters, utilize communication channel separately that continuous data is imported in display terminal simultaneously, realize the redundancy of communication channel between high-low pressure.
7. the direct metering method of high voltage electric energy of binary channels data redundancy according to claim 6, is characterized in that: record voltage between phases signal in high-pressure side by voltage signal sensor; Record the current signal of A phase and C phase by current signal sensor, the output signal of voltage signal sensor and current signal sensor is delivered to the metering units of A, C phase.
8. the direct metering method of high voltage electric energy of binary channels data redundancy according to claim 7, is characterized in that: described current signal sensor is arranged on the noble potential of A phase and C phase, and its input current and secondary output current are equipotential; The secondary output voltage of voltage signal sensor is to lay respectively on the noble potential of A phase and C phase.
9. the direct metering method of high voltage electric energy of binary channels data redundancy according to claim 8, it is characterized in that: described electric energy metrical unit is main metering units and submeter unit each other, two electric energy metrical unit are being received after the output signal of this side voltage signal sensor and current signal sensor, carry out the calculating of this side voltage, electric current and phase-splitting electric energy, the data that calculate are passed to respectively to the electric energy metrical unit of offside by optical fiber; Receiving after the data of offside, two electric energy metrical unit are for further processing to data respectively, obtain needed phase electric flux and other electric parameters of closing; These electric parameters are passed to respectively the display terminal of low-pressure side in storing on the spot by communication module.
10. the direct metering method of high voltage electric energy of binary channels data redundancy described in the arbitrary claim of claim 6 to 9, is characterized in that: described appointment is A phase and B phase mutually, and benchmark is C phase mutually; Or specifying is B phase and C phase mutually, and benchmark is A phase mutually.
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| CN107102201A (en) * | 2017-04-01 | 2017-08-29 | 国网山东省电力公司枣庄供电公司 | A kind of integrated high-pressure electric power meter |
| CN111308191A (en) * | 2020-03-26 | 2020-06-19 | 国家能源集团宁夏煤业有限责任公司 | Coal mine electric energy metering system |
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