CN104502881A - Device for eliminating and monitoring PT (Potential Transformer) secondary circuit voltage drop - Google Patents
Device for eliminating and monitoring PT (Potential Transformer) secondary circuit voltage drop Download PDFInfo
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- CN104502881A CN104502881A CN201410794976.0A CN201410794976A CN104502881A CN 104502881 A CN104502881 A CN 104502881A CN 201410794976 A CN201410794976 A CN 201410794976A CN 104502881 A CN104502881 A CN 104502881A
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Abstract
The invention discloses a device for eliminating and monitoring PT (Potential Transformer) secondary circuit voltage drop. The device comprises a voltage follower module circuit, a power module, a detection module, a CPU (Central Processing Unit) module and a switching module circuit, wherein the detection module is used for carrying out real-time sampling detection on an input/output end of the voltage follower module circuit; the CPU module decides the switching between the voltage follower module and an external resistance module through sampling, comparing and analyzing received electric power data so as to monitor a working condition of the voltage follower module; a circuit of the voltage follower module is packaged to form a first unit; circuits of the power module, the detection module, the CPU module and the switching module are packaged to form a second unit; the first unit and the second unit are movably connected through a pluggable connecting terminal; conductive contacts are arranged on the outer surface of the first unit, and paired conductive contacts are arranged on the second unit; part of the contacts are used for electrically connecting the voltage follower module circuit and the switching module, and the other part of the contacts are used for electrically connecting the voltage follower module circuit and the power module.
Description
Technical field
The present invention relates to field of power, the power industry PT secondary circuit voltage drop particularly based on voltage follower principle is eliminated and monitoring device.
Background technology
DL/T448 ?define the allowed band of all kinds of electric power meter PT secondary circuit voltage drop in 2000 " electric energy measuring management technical management codes ".Domestic based on voltage follower principle produce all adopt integration product structure for PT secondary circuit voltage drop cancellation element, in real work, there is following problem:
(1) follower circuit components and parts because of self-heating, ventilation and heat is not in place, external voltage suddenlys change, shove etc., and reason causes circuit devcie to damage maybe can not reach when serviceability requires and need timely repair and replacement, the device of integral structure needs integral replacing, change need of work and remove old device in PT secondary circuit, new equipment is installed.
(2) integral replacement device: need to relevant departments' application license before more changing jobs, need after replacing to mend to calculate to relevant departments to have a power failure the electricity of few meter because changing duration of work PT secondary circuit, program is loaded down with trivial details, and electricity ten is mended nine incomplete.
(3) existing most device lacks the function of monitoring PT secondary circuit operating mode (voltage, electric current, power, power factor), plant running management inconvenience.
Summary of the invention
Goal of the invention: technical matters to be solved by this invention is for the deficiencies in the prior art, provides a kind of PT secondary circuit voltage drop to eliminate and monitoring device.
In order to solve the problems of the technologies described above, the invention discloses a kind of PT secondary circuit voltage drop and eliminating and monitoring device, voltage follower modular circuit, power module, detection module, CPU module and switching module circuit,
Detection module carries out real-time sampling detection to voltage follower module input/output terminal, and collection electric power data is transferred to CPU module and processes;
Described CPU module, by the operating mode to the electric power data sampling comparative analysis monitoring voltage follower module received, determines the switching of voltage follower module and non-essential resistance module;
Described voltage follower modular circuit is encapsulated as first module; Power module, detection module, CPU module and switching module circuit package are second unit;
Detachable flexible connection between first module and second unit;
Described first module outside surface arranges three with upper terminal conductive contact, and described second unit arranges match with it three with upper terminal conductive contact; Wherein part (two or more) terminal conductive contact is used for the electrical connection of voltage follower modular circuit and switching module, and all the other (two or more) terminal conductive contacts are used for the electrical connection of voltage follower modular circuit and power module; The optional technical scheme of such as the present invention, described first module outside surface arranges 16 terminal conductive contacts, and described second unit arranges 16 the terminal conductive contacts matched with it; Wherein 8 terminal contact are used for the electrical connection of voltage follower modular circuit and switching module, and 6 terminal contact are used for the electrical connection of voltage follower modular circuit and power module;
Described switching module circuit is used for controlling first module according to the instruction of CPU and second unit is electrically connected or disconnects.
In the present invention, described first module comprises the first radiating module, and second unit comprises the second radiating module, and described first module and second unit are provided with 2 terminal contact, for the connection of the first radiating module and second unit.
In the present invention, described second unit comprises the display module be connected with CPU module.
In the present invention, described second module comprises the communication module be connected with CPU module.
In the present invention, by the detachable flexible connection of plug-in type connection terminal between described first module and second unit.
Compare with existing apparatus, the inventive method has following advantage
1, because have employed voltage follower module and its radiating module to form first module entirety absolute construction mode, first module is connected with pluggable mode by terminal with second unit, when changing first module, second unit switching module makes measuring apparatus return to former PT secondary circuit duty, maintenance more changes jobs to align often to measure and has no effect, safeguarding more changes jobs becomes very convenient, saves the maintenance cost of user and manufacturing firm.
2, because have employed voltage follower module and its radiating module forms first module absolute construction mode, first module is connected with pluggable mode by terminal with second unit, when secondary circuit bearing power changes within the specific limits, change the demand that the different follower module of power can meet bearing power change, spot replace first module can be dealt with problems, second unit, without the need to changing, saves improvement cost.
3, first module and second unit circuit are disconnected by switch and switching module, and on-the-spot plug is changed first module and belonged to not hot line job, and maintainer's security improves.
4, because add the real-time sampling of output end current, achieve the Real-Time Monitoring to PT secondary circuit operating mode, provide and the effective means managed is run to PT secondary circuit.
Accompanying drawing explanation
To do the present invention below in conjunction with the drawings and specific embodiments and further illustrate, above-mentioned and/or otherwise advantage of the present invention will become apparent.
Fig. 1 is embodiment 1 general structure schematic diagram.
Fig. 2 is embodiment 1 outer enclosure structural representation.
Embodiment
Embodiment 1
As shown in Figure 1, voltage follower modular circuit, follower radiating module circuit are formed independent integers 1 i.e. first module by the present embodiment, other modules such as power module, detection module, CPU module, communication module, display module, the switching module circuit of device form the i.e. second unit of an independent integers 2, overall 1 circuit is separated with overall 2 circuit, is connected with pluggable mode by conducting terminal.Described overall 1 outside surface arranges 16 terminal conductive contacts, and described overall 2 arrange 16 the terminal conductive contacts matched with it; Wherein 8 terminal contact are used for the electrical connection of voltage follower modular circuit and switching module, and 6 terminal contact are used for the electrical connection of voltage follower modular circuit and power module.Entirety 1 comprises the first radiating module, and overall 2 comprise the second radiating module, and described overall 1 and overall 2 are provided with 2 terminal contact, for the connection of the first radiating module with entirety 2.
Wherein, the radiating module of overall 1 inside connects outside 220V power supply by the switch of overall 2 inside.The power module of the voltage follower module difference connecting overall 2 of entirety 1, switching module, the power module of overall 2 is respectively communication module, display module, CPU module, detection module and switching module are powered, and CPU module is connecting communication module respectively, display module,, detection module and switching module power, communication module is connected with display module, and detection module is connected with switching module.Switching module connects outside PT secondary circuit, resistive module and electric energy meter simultaneously.
When detection module detects that follower damages or performance does not meet job requirement, device is by overall 2 switching module circuit momentary recovery former PT secondary circuit duty, and overall 1 circuit is disconnected or is connected with switching module circuit with overall 2 circuit by switch.
Voltage follower module, follower radiating module are formed independent integers 1, other modules such as power module, detection module, CPU module, communication module, display module, the switching module of device form an independent integers 2, overall 1 is connected with pluggable mode by conducting terminal with overall 2, and overall 1 is embedded in overall 2 surfaces.When detection module detects that follower damages or performance does not meet job requirement, device is by overall 2 switching module momentary recovery former PT secondary circuit duty, overall 1 is disconnected by switch and switching module and overall 2 on circuit, changes overall 1 as long as on-the-spot.Because be that plug-in connects, maintenance work is very convenient.
Detection module carries out real-time sampling detection to voltage follower module input/output terminal, and Gather and input terminal voltage, output end voltage, current parameters, processed by CPU module.CPU module, by the operating mode to the real-time sampling comparative analysis monitoring voltage follower module of input and output voltage, determines voltage follower module and resistive module switching simultaneously; Is analyzed by input terminal voltage (or output end voltage) and output end current parameter real-time sampling, no matter voltage follower module is in and throws or monitoring that the state of cutting can realize PT secondary circuit operating mode.
PT secondary circuit work information is transferred to backstage on the spot by device 485/ Ethernet, or by GPRS remote transmission to backstage, backstage is eliminated loop pressure drops all in system and monitoring device operating condition carries out operational management with the PT secondary circuit operating mode of having installed device.
As shown in Figure 2, after the present embodiment encapsulation, can be set to reeded structure by overall 2, overall 1 size is adaptive with the groove of overall 2, forms the entirety of a rectangular parallelepiped, Stability Analysis of Structures after installation, attractive in appearance, is easy to dismounting and change.
Embodiment 2
The present embodiment says the mode that concrete engineering is applied:
One, independent integers 1
1, independent integers 1 is formed with voltage follower circuit module and radiating module
2, independent integers 1 is connected with independent integers 2 by pluggable mode
3, independent integers 1 working power is provided by independent integers 2
Two, independent integers 2
1, independent integers 2 is formed with working power module, CPU module, switching module, detection module, radiating module, communication module
2, independent integers 2 is in electric power meter end series connection access PT secondary circuit
3, independent integers 2 output signal controls the resistive module switching synchronous with voltage follower exporting access PT secondary circuit in parallel in terminal box at PT
Three, annex
Installation accessories hanger (2), 4mm
2wire (four color 4x5), phoenix voltage terminal (2 groups), pin type (colding pressing) the end of a thread (26), bar frame (2), data connecting line (2), power lead (1), signal wire 2.5mm
2some length
The invention provides a kind of PT secondary circuit voltage drop to eliminate and monitoring device; the method and access of this technical scheme of specific implementation is a lot; the above is only the preferred embodiment of the present invention; should be understood that; for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.The all available prior art of each ingredient not clear and definite in the present embodiment is realized.
Claims (5)
1. PT secondary circuit voltage drop is eliminated and a monitoring device, comprises voltage follower modular circuit, power module, detection module, CPU module and switching module circuit,
Detection module carries out real-time sampling detection to voltage follower module input/output terminal, and collection electric power data is transferred to CPU module and processes;
Described CPU module, by the operating mode to the electric power data sampling comparative analysis monitoring voltage follower module received, determines the switching of voltage follower module and non-essential resistance module;
It is characterized in that, described voltage follower modular circuit is encapsulated as first module; Power module, detection module, CPU module and switching module circuit package are second unit;
Detachable flexible connection between first module and second unit;
Described first module outside surface arranges three with upper terminal conductive contact, and described second unit arranges match with it three with upper terminal conductive contact; Wherein part terminal conductive contact is used for the electrical connection of voltage follower modular circuit and switching module, and all the other terminal conductive contacts are used for the electrical connection of voltage follower modular circuit and power module;
Described switching module circuit is used for controlling first module according to the instruction of CPU and second unit is electrically connected or disconnects.
2. a kind of PT secondary circuit voltage drop according to claim 1 is eliminated and monitoring device, it is characterized in that, described first module comprises the first radiating module, second unit comprises the second radiating module, described first module and second unit are provided with 2 terminal contact, for the connection of the first radiating module and second unit.
3. a kind of PT secondary circuit voltage drop according to claim 1 is eliminated and monitoring device, and it is characterized in that, described second unit comprises the display module be connected with CPU module.
4. a kind of PT secondary circuit voltage drop according to claim 1 is eliminated and monitoring device, and it is characterized in that, described second unit comprises the communication module be connected with CPU module.
5. a kind of PT secondary circuit voltage drop according to claim 1 is eliminated and monitoring device, it is characterized in that, by the detachable flexible connection of plug-in type connection terminal between described first module and second unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410794976.0A CN104502881A (en) | 2014-12-18 | 2014-12-18 | Device for eliminating and monitoring PT (Potential Transformer) secondary circuit voltage drop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410794976.0A CN104502881A (en) | 2014-12-18 | 2014-12-18 | Device for eliminating and monitoring PT (Potential Transformer) secondary circuit voltage drop |
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| CN104502881A true CN104502881A (en) | 2015-04-08 |
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| CN201410794976.0A Pending CN104502881A (en) | 2014-12-18 | 2014-12-18 | Device for eliminating and monitoring PT (Potential Transformer) secondary circuit voltage drop |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105158539A (en) * | 2015-07-20 | 2015-12-16 | 钱坤 | Circuit for measuring voltage drop of PT secondary circuit on the basis of voltage drop eliminating device |
| CN106997002A (en) * | 2017-05-18 | 2017-08-01 | 贵州电网有限责任公司电力科学研究院 | Circuit structure and measuring method for measuring PT secondary circuit voltage drops and load |
| CN111063531A (en) * | 2020-01-07 | 2020-04-24 | 南方电网科学研究院有限责任公司 | Voltage transformer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105158539A (en) * | 2015-07-20 | 2015-12-16 | 钱坤 | Circuit for measuring voltage drop of PT secondary circuit on the basis of voltage drop eliminating device |
| CN106997002A (en) * | 2017-05-18 | 2017-08-01 | 贵州电网有限责任公司电力科学研究院 | Circuit structure and measuring method for measuring PT secondary circuit voltage drops and load |
| CN106997002B (en) * | 2017-05-18 | 2023-09-01 | 贵州电网有限责任公司电力科学研究院 | Circuit structure and method for measuring PT secondary circuit voltage drop and load |
| CN111063531A (en) * | 2020-01-07 | 2020-04-24 | 南方电网科学研究院有限责任公司 | Voltage transformer |
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Application publication date: 20150408 |