CN105004943A - Electric energy quality monitoring and electric energy metering device that can be mounted and dismounted in an electrified manner at a high-tension side - Google Patents
Electric energy quality monitoring and electric energy metering device that can be mounted and dismounted in an electrified manner at a high-tension side Download PDFInfo
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- CN105004943A CN105004943A CN201510303054.XA CN201510303054A CN105004943A CN 105004943 A CN105004943 A CN 105004943A CN 201510303054 A CN201510303054 A CN 201510303054A CN 105004943 A CN105004943 A CN 105004943A
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Abstract
The invention relates to an electric energy quality monitoring and electric energy metering device that can be mounted and dismounted in an electrified manner at a high-tension side, and belongs to the technical field of electric energy quality on-line monitoring and electric energy metering. The device includes three current and voltage acquisition units, a CPU module, a low-tension side voltage energy-supplying power supply module, and a wireless communication module. Each current acquisition unit is connected to the CPU module and the low-tension side voltage energy-supplying power supply module. The low-tension side voltage energy-supplying power supply module and the communication module are connected to the CPU module. The device can be mounted without power being cut or lines being cut, is suitable for indoor and outdoor environments, has electric energy quality monitoring and electric energy metering functions, and has the characteristics of wide measurement range, wide response frequency band width and high accuracy within a wide operational temperature range.
Description
Technical field
The invention belongs to quality of power supply on-line monitoring and Electric Energy Metering Technology field, particularly a kind of can the electric energy quality monitoring of the charged mounting or dismounting in high-pressure side and electric power meter.
Background technology
Due to electric power networks expansion and the appearance of interconnected, large-scale interconnected power system, electric network composition becomes increasingly complex, and user requires more and more higher to power quality, and power supply department is more paid attention to power quality; But the independence that existing each voltage power-less adjusting device only carries out doing things in his own way according to the measured value installed and measured a little controls cannot practical requirement.
Because power distribution network runs changeable, and all kinds of new forms of energy and distributed power source infiltration access, under existing monitoring equipment performance condition, cannot be in operation to increase fast and measure monitoring point, make effective monitoring and statistics of line loss and management to become more difficult.
Because user requires more and more higher to power supply reliability, power cut construction is more and more difficult, and monitoring, diagnosing must meet the demand of fast and flexible networking and large data, market extremely needs high-pressure side can charged Fast Installation, and reliability and the high high voltage electric energy quality monitoring device of accuracy.In addition, from the angle of anti-electricity-theft attenuating management line loss, high-pressure side installs the monitoring equipment possessing electric energy metrical function additional, is also anti-electricity-theft very effective mode.
Main high voltage measuring apparatus and the equipment of application at present in electrical network mainly contain two kinds, and all cannot not break the charged installation do not had a power failure, and in addition, also mainly there is following problem:
One is high-tension electricity magnetic-type batch meter, the design of general employing two elements electromagnetic transformer, there is due to electromagnetic transformer shortcomings such as " ferroresonance, easy magnetic saturation and own loss are large ", if a large amount of on the main feeder lines such as main line branch road, the safety and economic benefit that will reduce operation of power networks is installed.In addition, the secondary singal of high-tension electricity magnetic-type batch meter needs two times transfer could supply low pressure electricity Instrument use, because this increasing the secondary comprehension error of measurement, reduces accuracy.
Two is high-voltage electric energy meters, and generally still adopt two elements to design, purposes is limited to electric energy metrical, and the method for there is no meets to the more multiduty electrical quantities measurements such as the such as quality of power supply and power distribution automation and measures field.In addition, a part of high-voltage electric energy meter still adopts electromagnetic transformer, except portioned product take by improve turn ratio evaded except signal two times transfer, above-mentioned high-tension electricity magnetic-type batch meter Problems existing its still exist.
Summary of the invention
The object of the invention is to the weak point for overcoming prior art, there is provided a kind of can the electric energy quality monitoring of the charged mounting or dismounting in high-pressure side and electric power meter, this device is without the need to having a power failure and broken string installation, be applicable to environment indoor and outdoor, there is the function of electric energy quality monitoring and electric energy metrical, and measurement range and response band is wide, accuracy is high under wider operating temperature range characteristic.
The present invention propose a kind of can the electric energy quality monitoring of the charged mounting or dismounting in high-pressure side and electric power meter, it is characterized in that, this device comprises: three groups of current/voltage collecting units, CPU module, low-pressure side voltage energising power module and wireless communication modules; Often organize current acquisition unit to be connected with low-pressure side voltage energising power module with CPU module respectively, low-pressure side voltage energising power module and communication module are connected with CPU module respectively.
Describedly often organize that current acquisition unit includes high pressure equipotential opening current transformer, high pressure equipotential current signal collection module, high pressure equipotential voltage draw-out power supply module, electronic type voltage transformer, capacitor type are got can mutual inductor and voltage signal acquisition module; Wherein, high pressure equipotential opening current transformer output terminal, high pressure equipotential voltage draw-out power supply module output terminal are connected with high pressure equipotential current signal collection module input end respectively, and electronic type voltage transformer output terminal is connected with voltage signal acquisition module input; Capacitor type is got and can be connected with low-pressure side voltage draw-out power supply module input with high pressure equipotential voltage draw-out power supply module input respectively by mutual inductor output terminal, high pressure equipotential current signal collection module is connected with CPU module is two-way, and the output terminal of voltage signal acquisition module is connected with low-pressure side voltage draw-out power supply module, CPU module respectively with input end.
Described device also comprises three high-tension circuit shielding boxs, three sleeve pipes, three signal optical fibres, six fuses, metal cabinets; High pressure equipotential current signal collection module and the high pressure equipotential voltage draw-out power supply module of one group of current/voltage collecting unit is placed respectively in three high-tension circuit metal shielding boxes, other device of three groups of current/voltage collecting units is placed in a metal cabinet, comprise electronic type voltage transformer, capacitor type is got can mutual inductor, voltage signal acquisition module, and CPU module and low-pressure side voltage draw-out power supply module; Three high-tension circuit metal shielding boxes are connected with metal cabinet by three sleeve pipes; Six roots of sensation fuse, wherein three fuse upper ends are connected with the metal tube arm in three sleeve pipes respectively by three high-tension circuit metal shielding boxes, three fuse lower ends are connected with three electronic type voltage transformers of three groups of current/voltage collecting units respectively, other three fuse upper ends are respectively by three high pressure equipotential voltage draw-out power supply modules of the electrode in metal tube in three sleeve pipes and three groups of current/voltage collecting units, and three fuse lower ends are got with three capacitor types of three groups of current/voltage collecting units respectively and can be connected by mutual inductor high-pressure stage; Three of three groups of current/voltage collecting units high pressure equipotential current signal collection modules are connected with CPU module through three sleeve pipes by three signal optical fibres respectively.
Feature of the present invention:
Of the present inventionly in the electric energy quality monitoring of the charged mounting or dismounting in high-pressure side and electric power meter, electric current and voltage transformer (VT) can be three element design; Wherein current transformer is the high pressure equipotential design of opening or open-type, current acquisition module and be that the power module on-line operation of its energy supply is in high-pressure side; Voltage transformer (VT) adopts electronic mutual inductor; Often install a high-voltage capacitive divider mutually in addition additional and get energy type mutual inductor as voltage, be responsible for high-pressure side circuit module and the energy supply simultaneously of lower-voltage circuit module of every phase; Voltage transformer (VT) and voltage get energy type mutual inductor by the equipotential metal shielding pressure outside current transformer and high-pressure side operating circuit module; Current transducer signal after the acquisition module digitized processing of high-pressure side through Optical Fiber Transmission in CPU module, voltage transformer (VT) signal also transfers to CPU module in low-pressure side after voltage acquisition module digitized processing, CPU module is responsible for synchronous process and the calculating of current and voltage signals, and result of calculation transfers to far-end finally by communication module; In addition, communication module except except sending and receiving remote signal, also can receiving and dispatching closely signal, to complete the communication with equipment nearby.
Compared with prior art, the present invention has the following advantages:
1, charged installation can meet the requirement of power supply reliability, and be conducive to layouting in a large number and quickly networking;
2, without secondary connection, high pressure isopotential electrical current transformer is clamped on high voltage bus, also namely complete electric current, voltage measurement and energy supply pressure simultaneously;
3, current transformer high-pressure side equipotential is run and is simplified insulating Design;
4, current-voltage transformer is without magnetic saturation and ferroresonance, and measurement range is wide, the drift of accuracy high and low temperature, the accuracy requirement that can meet measurement, metering simultaneously and protect, and broad forehead determines the demand of ER effect ratio;
5, adopt mutual inductor three element design, while accuracy of measurement is superior to two elements design, does not increase the idle and out-of-balance current of circuit, meet the requirement of operation of power networks to safety and economic benefit;
6, capacitance partial pressure energy-provision way can meet the circuit energy supply of high and low pressure side simultaneously, guarantees that energy supply is without dead angle;
7, current and voltage signals loop is without two times transfer, or with the sampling of light digital data transmission, effectively improves the overall accuracy of measuring.
Accompanying drawing explanation
Fig. 1 is one-piece construction of the present invention and principle of work block diagram.
Fig. 2 is embodiment of the present invention general structure schematic diagram.
Fig. 3 is high pressure equipotential electric current sampling module embodiment composition frame chart of the present invention.
Fig. 4 is high pressure equipotential voltage draw-out power supply module embodiments circuit theory diagrams of the present invention.
Fig. 5 is the embodiment circuit diagram that electric capacity of the present invention gets energy mutual inductor.
Fig. 6 is the implementation block diagram of CPU module and communication module.
Embodiment
In order to achieve the above object, provided by the invention can the electric energy quality monitoring of the charged mounting or dismounting in high-pressure side and electric power meter by reference to the accompanying drawings and embodiment be described in detail as follows;
Provided by the invention can the electric energy quality monitoring of the charged mounting or dismounting in high-pressure side and electric power meter as shown in Figure 1, comprising: three groups of current/voltage collecting units, CPU module 12, low-pressure side voltage energising power module 14 and wireless communication modules 13; Often organize current acquisition unit to be connected with low-pressure side voltage energising power module 14 with CPU module 12 respectively, low-pressure side voltage energising power module 14 and communication module 13 are connected with CPU module 12 respectively.Describedly often organize that current acquisition unit includes high pressure equipotential opening current transformer 1, high pressure equipotential current signal collection module 2, high pressure equipotential voltage draw-out power supply module 3, electronic type voltage transformer 8, capacitor type are got can mutual inductor 9 and voltage signal acquisition module 11; Wherein, high pressure equipotential opening current transformer 1 output terminal, high pressure equipotential voltage draw-out power supply module 3 output terminal are connected with high pressure equipotential current signal collection module input end 2 respectively, and electronic type voltage transformer 8 output terminal is connected with voltage signal acquisition module 11 input end; Capacitor type is got and can be connected with low-pressure side voltage draw-out power supply module input 14 with high pressure equipotential voltage draw-out power supply module input 3 respectively by mutual inductor 9 output terminal, high pressure equipotential current signal collection module 2 is connected with CPU module 12 is two-way, and the output terminal of voltage signal acquisition module is connected with low-pressure side voltage draw-out power supply module 14, CPU module 12 respectively with input end 11.
The principle of work of apparatus of the present invention is: high pressure equipotential opening current transformer 1 gathers the electric current of bus, export the secondary singal becoming certain relation with bus current, deliver to high pressure equipotential electric current sampling module 2 and carry out digitized processing, then deliver to CPU module 12; Electronic type voltage transformer 8 exports the secondary singal becoming certain relation with busbar voltage, delivers to voltage signal sampling module 11 and carries out digitized processing, then deliver to CPU module 12.CPU module 12 obtains power quality parameter and the metric results such as active energy, reactive energy such as effective value, electric current and voltage angle, harmonic content, frequency, power after carrying out Spectrum Conversion to the current/voltage digital signal received, and result sends finally by communication module 13.
This device is specifically implemented also to comprise three high-tension circuit shielding boxs, 4, three sleeve pipes, 5, three signal optical fibres, 6, six fuses, 10, metal cabinet 7; High pressure equipotential current signal collection module 2 and the high pressure equipotential voltage draw-out power supply module 3 of one group of current/voltage collecting unit is placed respectively in three high-tension circuit metal shielding boxes 4, other device of three groups of current/voltage collecting units is placed in a metal cabinet 7, comprise electronic type voltage transformer 8, capacitor type is got can mutual inductor 9, voltage signal acquisition module 11, and CPU module 12 and low-pressure side voltage draw-out power supply module 14; Three high-tension circuit metal shielding boxes 4 are connected with metal cabinet 7 by three sleeve pipes 5; Six roots of sensation fuse, wherein three fuse upper ends are connected with the metal tube arm in three sleeve pipes 5 respectively by three high-tension circuit metal shielding boxes 4, three fuse lower ends are connected with three electronic type voltage transformers 8 of three groups of current/voltage collecting units respectively, other three fuse upper ends are got with three capacitor types of three groups of current/voltage collecting units respectively can be connected by mutual inductor 9 high-pressure stage respectively by three high pressure equipotential voltage draw-out power supply modules, 3, three fuse lower ends of the electrode in metal tube in three sleeve pipes 5 and three groups of current/voltage collecting units; Three of three groups of current/voltage collecting units high pressure equipotential current signal collection modules 2 are connected with CPU module 12 through three sleeve pipes 5 by three signal optical fibres 6 respectively, as shown in Figure 2;
Function and the embodiment of embodiments of the invention structure and each parts are described in detail as follows respectively:
Embodiments of the invention structure as shown in Figure 2, comprises high pressure equipotential opening current transformer 1, high pressure equipotential current signal collection module 2, high pressure equipotential voltage draw-out power supply module 3, high-tension circuit metal shielding box 4, sleeve pipe 5, signal optical fibre 6, metal cabinet 7, electronic type voltage transformer 8, capacitor type are got can mutual inductor 9, fuse 10, voltage signal acquisition module 11, CPU module 12, communication module 13, low-pressure side voltage draw-out power supply module 14; Its annexation and principle of work:
High pressure equipotential opening current transformer 1 is by the shielding line of shielding box, by Signal transmissions in high pressure isopotential electrical stream signal acquisition module 2, wherein, metal shielding outside high pressure equipotential opening current transformer 1 is connected with high-tension circuit metal shielding box by the shielded metal layer of shielding box, formed high pressure equipotential while and complete voltage pressure; High pressure equipotential current signal collection module 2 directly gathers the signal of high pressure equipotential opening current transformer 1 and completes digital processing, then transports to CPU module 12 through signal optical fibre 6; High pressure equipotential voltage get can high pressure on voltage module 3 high-tension circuit metal shielding box 4 as with reference to current potential, from capacitor type get can get mutual inductor 9 can, and complete the energy supply to high pressure equipotential current signal collection module 2; High-tension circuit metal shielding box 4 is connected with outer metal housing with the pickup electrode of shielding line with high pressure equipotential opening current transformer 1 by air plug, and completes the electromagnetic screen to high-tension circuit; Installation high-voltage electric circuit metal shielding box 4 in sleeve pipe 5 upper flanges, flange placed in the middle is arranged on metal cabinet 7, sleeve pipe except play high pressure caused respectively electronic type voltage transformer 8 and capacitor type are got can except the effect on mutual inductor 9, also play the effect of optical fiber insulator, namely signal optical fibre 6 passes from sleeve pipe 5; On high-tension side digital current signal is transferred to CPU module 12 by signal optical fibre 6, and plays the effect of high-low pressure signal isolation; Metal cabinet 7 supporting sleeve reliable ground, play the effects such as rainproof, dust-proof, antiultraviolet, also play effect electronic type voltage transformer 8 and other low-pressure side operating circuit being carried out to stray capacitance and electromagnetic screen in addition; Electronic type voltage transformer 8 is arranged in metal cabinet 7, and be responsible for measuring voltage, its signal is directly transferred to voltage signal acquisition module 11; Capacitor type is got and can is arranged in metal cabinet 7 by mutual inductor 9, and responsible voltage gets energy, and gives high pressure equipotential voltage draw-out power supply module 3 and the energy supply of low-pressure side voltage draw-out power supply module 14 respectively; Fuse 10 is for being built in metal cabinet, and every phase electronic type voltage transformer 8 and capacitor type are got and mutual inductor 9 can be filled one, play the effect of protective separation; Voltage signal acquisition module 11 gathers the signal of electronic type voltage transformer 8, is transferred to CPU module 12 after digitized processing; CPU module 12 is responsible for the calculating simultaneously gathering current and voltage signals and the quality of power supply and electric flux, and it sends data to communication module 13 after completing calculating; Communication module 13 is responsible for CPU module 12; Low-pressure side voltage draw-out power supply module 14 is responsible for voltage signal acquisition module 11, CPU module 12 and communication module 13 energy supply.
Embodiment and the function of each parts of the present embodiment are:
High pressure isopotential electrical current transformer 1 adopts working range to be-40 to+70 degree, accuracy of measurement be 0.5 and level more than flexible Luo-coil or opening hard skeleton Luo-coil or open magnetic core coil.
Voltage signal acquisition module 11 principle of high pressure equipotential electric current sampling module 2 and low-pressure side with form identical: as shown in Figure 3, primarily of the analog to digital converter AD7606, the microcontroller-STM32F103 that are connected successively, multimode optical fiber transmitter HFBR-1414 device composition, wherein current signal directly enters AD7606 and carries out digital collection conversion, and then the digital data transmission processed is carried out computing to STM32F103, the Signal transmissions finally processed sends to CPU module by it again to fiber optic transmitter HFBR-1414.
High pressure equipotential voltage draw-out power supply module 3 as shown in Figure 4, by rectifier bridge D9, two electric capacity C1, C2, form with DC-to-dc regulated converter U2, wherein, get and can become DC voltage by the voltage got of mutual inductor after rectifier bridge D9, through electric capacity C2, (ripple component of this DC voltage is larger, the smoothing filtering of electric capacity C2 of 1500uf need be not less than with one) after output to DC-to-dc regulated converter U2, the output of U2 connects electric capacity C1 filtering, obtains a stable voltage.The principle of work of low-pressure side energising power module 14 is identical with the principle of high pressure equipotential voltage draw-out power supply module 3, and the reference potential of just work is different.
Electric capacity gets the example structure of energy mutual inductor 9 as shown in Figure 5, employing dielectric level and dielectric loss index meet national standard, voltage factor is the dry-type capacitance voltage divider (be in series by three capacitors C4, C3, C5, high pressure equipotential voltage draw-out power supply module 3, low-pressure side energising power module 14 are connected to the two ends of C3) of 1.9.
Electronic type voltage transformer 8 adopts dielectric level and dielectric loss index to meet national standard, working range is for being-40 to+70 degree, accuracy of measurement be 0.5 grade and more than, voltage factor be 1.9, based on the dry electronic formula voltage transformer (VT) of electric resistance partial pressure or capacitance partial pressure or capacitance-resistance voltage division principle.
CPU module 12 and communication module 13: as shown in Figure 6, wherein CPU module 12 is formed primarily of fiber optic receiver HFBR-2412, chip MCU-STM32F103, communication module 13 adopts antenna and communication device S14432 to form, concrete principle of work is: the current and voltage signals that each road has calculated sends to fiber optic receiver HFBR-2412 by optical fiber, then chip MCU-STM32F103 is inputed to, and the calculating of the quality of power supply and electric energy is completed by it, result of calculation is transferred to communication module 13 and finally completes communication teletransmission by it.
Sleeve pipe 5, signal optical fibre 6, metal cabinet 7 all adopt this area conventional products.
Although with reference to some preferred embodiment of the present invention, to invention has been diagram and describing, the general professional and technical personnel of this area should be understood that and can do various change to the present invention in form and details, and without departing from the spirit and scope of the present invention.
Claims (9)
1. can the electric energy quality monitoring of the charged mounting or dismounting in high-pressure side and an electric power meter, it is characterized in that, this device comprises: three groups of current/voltage collecting units, CPU module, low-pressure side voltage energising power module and wireless communication modules; Often organize current acquisition unit to be connected with low-pressure side voltage energising power module with CPU module respectively, low-pressure side voltage energising power module and communication module are connected with CPU module respectively.
2. device as claimed in claim 1, it is characterized in that, describedly often organize that current acquisition unit includes high pressure equipotential opening current transformer, high pressure equipotential current signal collection module, high pressure equipotential voltage draw-out power supply module, electronic type voltage transformer, capacitor type are got can mutual inductor and voltage signal acquisition module; Wherein, high pressure equipotential opening current transformer output terminal, high pressure equipotential voltage draw-out power supply module output terminal are connected with high pressure equipotential current signal collection module input end respectively, and electronic type voltage transformer output terminal is connected with voltage signal acquisition module input; Capacitor type is got and can be connected with low-pressure side voltage draw-out power supply module input with high pressure equipotential voltage draw-out power supply module input respectively by mutual inductor output terminal, high pressure equipotential current signal collection module is connected with CPU module is two-way, and the output terminal of voltage signal acquisition module is connected with low-pressure side voltage draw-out power supply module, CPU module respectively with input end.
3. device as claimed in claim 1, it is characterized in that, described device also comprises three high-tension circuit shielding boxs, three sleeve pipes, three signal optical fibres, six fuses, metal cabinets; High pressure equipotential current signal collection module and the high pressure equipotential voltage draw-out power supply module of one group of current/voltage collecting unit is placed respectively in three high-tension circuit metal shielding boxes, other device of three groups of current/voltage collecting units is placed in a metal cabinet, comprise electronic type voltage transformer, capacitor type is got can mutual inductor, voltage signal acquisition module, and CPU module and low-pressure side voltage draw-out power supply module; Three high-tension circuit metal shielding boxes are connected with metal cabinet by three sleeve pipes; Six roots of sensation fuse, wherein three fuse upper ends are connected with the metal tube arm in three sleeve pipes respectively by three high-tension circuit metal shielding boxes, three fuse lower ends are connected with three electronic type voltage transformers of three groups of current/voltage collecting units respectively, other three fuse upper ends are respectively by three high pressure equipotential voltage draw-out power supply modules of the electrode in metal tube in three sleeve pipes and three groups of current/voltage collecting units, and three fuse lower ends are got with three capacitor types of three groups of current/voltage collecting units respectively and can be connected by mutual inductor high-pressure stage; Three of three groups of current/voltage collecting units high pressure equipotential current signal collection modules are connected with CPU module through three sleeve pipes by three signal optical fibres respectively.
4. device as claimed in claim 1, it is characterized in that, described high pressure isopotential electrical current transformer adopts working range be-40 to+70 to spend, accuracy of measurement be 0.5 and level more than flexible Luo-coil or opening hard skeleton Luo-coil or open magnetic core coil.
5. device as claimed in claim 1, it is characterized in that, described high pressure equipotential electric current sampling module is identical with the voltage signal acquisition module composition of low-pressure side: form primarily of the ADC-AD7606, the chip MCU-STM32F103 that are connected successively, fiber optic transmitter HFBR-1414 device, wherein current signal directly enters ADC-AD7606 and carries out digital collection conversion, and then the digital data transmission processed is carried out computing to MCU-STM32F103, the Signal transmissions finally processed sends to CPU module by it again to fiber optic transmitter HFBR-1414.
6. device as claimed in claim 1, it is characterized in that, described high pressure equipotential voltage draw-out power supply module is by full bridge rectifier, two electric capacity (C1, C2), commutator tube and DC-to-dc regulated converter composition, wherein, get and can become DC voltage by the voltage got of mutual inductor after commutator tube, full bridge rectifier rectification, DC-to-dc regulated converter is outputted to after the second electric capacity (C2) smoothing filtering, the output of DC-to-dc regulated converter connects the first electric capacity (C1) filtering, obtains a stable voltage.
7. device as claimed in claim 1, it is characterized in that, described electric capacity get can the voltage factor that is in series by three capacitors (C4, C3, C5) of mutual inductor be 1.9 dry-type capacitance voltage divider, high pressure equipotential voltage draw-out power supply module, low-pressure side energising power module are connected to the two ends being connected on middle electric capacity (C3).
8. device as claimed in claim 1, it is characterized in that, described electronic type voltage transformer 8 adopts dielectric level and dielectric loss index to meet national standard, working range is for being-40 to+70 degree, accuracy of measurement be 0.5 grade and more than, voltage factor be 1.9, based on the dry electronic formula voltage transformer (VT) of electric resistance partial pressure or capacitance partial pressure or capacitance-resistance voltage division principle.
9. device as claimed in claim 1, it is characterized in that, described CPU module is made up of fiber optic receiver HFBR-2412, chip MCU-STM32F103; Described communication module adopts antenna and communication device S14432 to form.
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| CN201510303054.XA CN105004943A (en) | 2015-06-04 | 2015-06-04 | Electric energy quality monitoring and electric energy metering device that can be mounted and dismounted in an electrified manner at a high-tension side |
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| CN201510303054.XA CN105004943A (en) | 2015-06-04 | 2015-06-04 | Electric energy quality monitoring and electric energy metering device that can be mounted and dismounted in an electrified manner at a high-tension side |
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| CN111751656A (en) * | 2020-06-05 | 2020-10-09 | 水木源华电气有限公司 | Voltage and current measurement energy-taking device for power transmission and distribution line |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105334375A (en) * | 2015-12-01 | 2016-02-17 | 国网河南省电力公司平顶山供电公司 | PT-CT combined device capable of being installed in charged mode |
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| CN111751656A (en) * | 2020-06-05 | 2020-10-09 | 水木源华电气有限公司 | Voltage and current measurement energy-taking device for power transmission and distribution line |
| CN112198356A (en) * | 2020-10-08 | 2021-01-08 | 北京豪锐达科技有限公司 | Current signal detection sensor of high-voltage overhead line |
| CN114264856A (en) * | 2021-11-16 | 2022-04-01 | 国网山西省电力公司忻州供电公司 | Voltage measurement and energy taking device capable of measuring small current |
| CN114252674A (en) * | 2021-12-15 | 2022-03-29 | 中国化学工程第十一建设有限公司 | Secondary wiring detection device and method |
| CN114252674B (en) * | 2021-12-15 | 2023-09-22 | 中国化学工程第十一建设有限公司 | Secondary wiring detection device and method |
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