CN205176096U - Eliminate or suppression secondary pressure drop device - Google Patents
Eliminate or suppression secondary pressure drop device Download PDFInfo
- Publication number
- CN205176096U CN205176096U CN201520993745.2U CN201520993745U CN205176096U CN 205176096 U CN205176096 U CN 205176096U CN 201520993745 U CN201520993745 U CN 201520993745U CN 205176096 U CN205176096 U CN 205176096U
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- relay
- working cell
- resistance
- drop device
- diode
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Abstract
The utility model discloses an eliminate or suppression secondary pressure drop device, including working cell, relay, working cell and relay parallel connection are between input ui and output uo, and input ui links to each other with output uo through working cell or relay. The working cell was prevented volt circuit, voltage follower, was prevented compensating circuit including what establish ties in proper order. Beneficial effect: the harm to eliminate or suppression secondary pressure drop device by the electromagnetic pulse that attacks thunder or thunder and lightning directly can be prevented effectively, eliminate or suppression secondary pressure drop device's normal steady operation is guaranteed, accurate transmission voltage signal. Simultaneously, through setting up the relay that connects in parallel mutually with the working cell, guaranteed when the working cell breaks down that the electric energy metering circuit is normally worked.
Description
Technical field
The utility model relates to a kind of elimination or suppression secondary voltage drop device, belongs to electric energy metrical and the protection field of total errors of electric energy countings.
Background technology
Should ensure the accuracy of electric energy metrical in the day-to-day operation of electric system, reasonably to protect the legitimate interests of power department and user both sides, therefore, the error of electric energy metrical should within the scope of de jure standards.
The error of current transformer, voltage transformer (VT), electric energy meter and Voltage Transformer Secondary Circuit Voltage Drop together constitute the principal element affecting electric energy metrical accuracy, and wherein the secondary circuit voltage of voltage transformer (VT) falls and arrived in the impact of present stage the situation that can not be ignored.
In order to eliminate or reduce the impact of secondary voltage drop on electric energy metrical, through the many-sided research of scientific and technical personnel with explore oneself and have many new methods, new technology to occur, but measurement loop is of crucial importance, can not be in operation generation mistake, job stability requires very high, otherwise can cause harmful effect to safe operation of power system.
Therefore, how effectively to ensure the stable operation eliminating or suppress secondary voltage drop device, accurate transmission voltage signal, taking suitable guard method to ensure the safe operation of electric system in time, is the gordian technique that electric energy metrical and protection field must solve.
Summary of the invention
The purpose of this utility model is for solving the problem, and the utility model discloses a kind of elimination or suppression secondary voltage drop device.
The utility model solves the technical scheme that its technical matters adopts: a kind ofly eliminate or suppress secondary voltage drop device, comprise working cell (1), relay (K), working cell (1) and relay (K) are connected in parallel between input end Ui and output terminal Uo, and input end Ui is connected with output terminal Uo through working cell (1) or relay (K).Described working cell (1) comprises anti-overvoltage circuit (101), voltage follower (102), anti-over-compensation circuit (103), and described anti-overvoltage circuit (101), described voltage follower (102), described anti-over-compensation circuit (103) are connected successively.
Described anti-overvoltage circuit (101), comprise resistance R1, voltage dependent resistor (VDR) RV1, electric capacity C1, described resistance R1 one end connects the contact 1 of input end Ui, voltage dependent resistor (VDR) RV1, relay (K) respectively, the resistance R1 other end connects the normal phase input end of electric capacity C1, voltage follower (102) respectively, voltage dependent resistor (VDR) RV1 other end ground connection, electric capacity C1 other end ground connection.
Described voltage follower (102) inverting input is connected with described voltage follower (102) output terminal through resistance R2.
Described anti-over-compensation circuit (103), comprise the first diode D1, the second diode D2, resistance R3, the first described diode D1 negative pole is connected with power Vcc, first diode D1 positive pole is connected with one end of the second diode D2 negative pole, resistance R2, voltage follower (102) output terminal, resistance R3 respectively, second diode D2 plus earth, the resistance R3 other end is connected with the contact 2 of relay K, output terminal Uo respectively.
The elimination that the utility model provides or suppression secondary voltage drop device, have following beneficial effect:
1. can effectively prevent by the electromagnetic pulse of direct lightning strike or thunder and lightning the infringement eliminating or suppress secondary voltage drop device by arranging anti-compensated volt circuit (103) after the output terminal that arranges anti-overvoltage circuit (101) and voltage follower (102) before the normal phase input end of voltage follower (102), ensure to eliminate or suppress the normal table of secondary voltage drop device to run, accurate transmission voltage signal.
2., by arranging the relay (K) be in parallel with working cell (1), ensure that ic for energy metering normally works when working cell (1) breaks down.
Accompanying drawing explanation
Fig. 1 is schematic block diagram of the present utility model.
Fig. 2 is circuit theory diagrams of the present utility model.
In FIG, 1 is working cell, and 101 is anti-overvoltage circuit, and 102 is voltage follower, and 103 is anti-over-compensation circuit.
Embodiment
Below with reference to specific embodiment, the technical scheme that the utility model provides is described in detail, following embodiment should be understood and be only not used in restriction scope of the present utility model for illustration of the utility model.
In FIG, described one is eliminated or is suppressed secondary voltage drop device to comprise working cell (1), relay (K), working cell (1) and relay (K) are connected in parallel between input end Ui and output terminal Uo, and input end Ui is connected with output terminal Uo through working cell (1) or relay (K).Described working cell (1) comprises anti-overvoltage circuit (101), voltage follower (102), anti-over-compensation circuit (103), and described anti-overvoltage circuit (101), described voltage follower (102), described anti-over-compensation circuit (103) are connected successively.
In fig. 2, described anti-overvoltage circuit (101), comprise resistance R1, voltage dependent resistor (VDR) RV1, electric capacity C1, described resistance R1 one end connects the contact 1 of input end Ui, voltage dependent resistor (VDR) RV1, relay (K) respectively, the resistance R1 other end connects the normal phase input end of electric capacity C1, voltage follower (102) respectively, voltage dependent resistor (VDR) RV1 other end ground connection, electric capacity C1 other end ground connection.
In fig. 2, described voltage follower (102) inverting input is connected with described voltage follower (102) output terminal through resistance R2.
In fig. 2, described anti-over-compensation circuit (103), comprise the first diode D1, the second diode D2, resistance R3, the first described diode D1 negative pole is connected with power Vcc, first diode D1 positive pole is connected with one end of the second diode D2 negative pole, resistance R2, voltage follower (102) output terminal, resistance R3 respectively, second diode D2 plus earth, the resistance R3 other end is connected with the contact 2 of relay (K), output terminal Uo respectively.
Workflow of the present utility model is:
Elimination of the present utility model or suppress in secondary voltage drop device place in circuit, when eliminating or suppress secondary voltage drop device to work, contact 1 and the contact 2 of relay (K) disconnect, working cell (1) works, and voltage exports through input end Ui, resistance R1, voltage follower (102) normal phase input end, voltage follower (102) output terminal, resistance R3 to output terminal Uo.
When eliminating or in suppression secondary voltage drop device, break down in working cell (1), the contact 1 of relay (K) and contact 2 adhesive, voltage from input end Ui through the contact 1 of relay (K) and contact 2 to output terminal Uo, ensure that ic for energy metering normally works.
Can effectively prevent by the electromagnetic pulse of direct lightning strike or thunder and lightning the infringement eliminating or suppress secondary voltage drop device by arranging anti-compensated volt circuit (103) after the output terminal that arranges anti-overvoltage circuit (101) and voltage follower (102) before the normal phase input end of voltage follower (102), effective stable operation ensureing elimination or suppress secondary voltage drop device, accurate transmission voltage signal.
Technological means disclosed in the utility model scheme is not limited only to the technological means disclosed in above-mentioned embodiment, also comprises the technical scheme be made up of above technical characteristic combination in any.
Claims (4)
1. eliminate or suppress secondary voltage drop device for one kind, comprise working cell (1), relay (K), it is characterized in that: working cell (1) and relay (K) are connected in parallel between input end Ui and output terminal Uo, input end Ui is connected with output terminal Uo through working cell (1) or relay (K), described working cell (1) comprises anti-overvoltage circuit (101), voltage follower (102), anti-over-compensation circuit (103), described anti-overvoltage circuit (101), described voltage follower (102), described anti-over-compensation circuit (103) is connected successively.
2. elimination according to claim 1 or suppression secondary voltage drop device, it is characterized in that: described anti-overvoltage circuit (101), comprise resistance R1, voltage dependent resistor (VDR) RV1, electric capacity C1, described resistance R1 one end connects the contact 1 of input end Ui, voltage dependent resistor (VDR) RV1, relay (K) respectively, the resistance R1 other end connects the normal phase input end of electric capacity C1, voltage follower (102) respectively, voltage dependent resistor (VDR) RV1 other end ground connection, electric capacity C1 other end ground connection.
3. elimination according to claim 1 or suppression secondary voltage drop device, is characterized in that: described voltage follower (102) inverting input is connected with described voltage follower (102) output terminal through resistance R2.
4. elimination according to claim 1 or suppression secondary voltage drop device, it is characterized in that: described anti-over-compensation circuit (103), comprise the first diode D1, the second diode D2, resistance R3, the first described diode D1 negative pole is connected with power Vcc, first diode D1 positive pole is connected with one end of the second diode D2 negative pole, resistance R2, voltage follower (102) output terminal, resistance R3 respectively, second diode D2 plus earth, the resistance R3 other end is connected with the contact 2 of relay (K), output terminal Uo respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520993745.2U CN205176096U (en) | 2015-12-05 | 2015-12-05 | Eliminate or suppression secondary pressure drop device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520993745.2U CN205176096U (en) | 2015-12-05 | 2015-12-05 | Eliminate or suppression secondary pressure drop device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205176096U true CN205176096U (en) | 2016-04-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520993745.2U Expired - Fee Related CN205176096U (en) | 2015-12-05 | 2015-12-05 | Eliminate or suppression secondary pressure drop device |
Country Status (1)
| Country | Link |
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| CN (1) | CN205176096U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106843355A (en) * | 2017-03-01 | 2017-06-13 | 广州今闰能源科技有限公司 | A kind of zero current secondary voltage drop dynamic compensating device |
-
2015
- 2015-12-05 CN CN201520993745.2U patent/CN205176096U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106843355A (en) * | 2017-03-01 | 2017-06-13 | 广州今闰能源科技有限公司 | A kind of zero current secondary voltage drop dynamic compensating device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180626 Address after: 211100 No. 1009 Tianyuan East Road, Jiangning District, Nanjing, Jiangsu. Patentee after: NANJING LANGXI ENVIRONMENTAL PROTECTION TECHNOLOGY CO.,LTD. Address before: 210024 Geotechnical Engineering Institute, 43 Research Institute of water research, Gulou Guan, Gulou District, Nanjing, Jiangsu Patentee before: Zhao Guozhu |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160420 Termination date: 20211205 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |