CN202393849U - Excitation characteristic quick testing device of voltage transformer - Google Patents
Excitation characteristic quick testing device of voltage transformer Download PDFInfo
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- CN202393849U CN202393849U CN 201120519896 CN201120519896U CN202393849U CN 202393849 U CN202393849 U CN 202393849U CN 201120519896 CN201120519896 CN 201120519896 CN 201120519896 U CN201120519896 U CN 201120519896U CN 202393849 U CN202393849 U CN 202393849U
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Abstract
The utility model discloses an excitation characteristic quick testing device of a voltage transformer, which comprises a current leakage protector, a power supply, a digital-to-analog (D/A) control output circuit, an analog-to-digital (A/D) measuring circuit, a power supply source, an E2 memory, a U-disk memory, a main chip circuit, a displayer, a control panel and the like, wherein the A/D measuring circuit comprises a current transformer, a voltage transformer and two rectifier filtering operation amplifiers; and the output end of the device is directly connected with a device to be measured, and the different portfolios of seven voltage value measuring points, i.e. 0.2Un, 0.5Un, 0.8Un, 1.0Un, 1.2Un, 1.5Un and 1.9Un are measured with 1V stepper voltage by boosting from 0V through an embedded program, and the results are automatically displayed and stored on corresponding equipment; and the device has a compact structure, high testing precision and is convenient to operate.
Description
Technical field
The utility model relates to electric system High-Voltage Experimentation Technology field, relates in particular to the quick proving installation of a kind of voltage transformer (VT) excitation property.
Background technology
Various high voltage electric equipments in the electric system; Requirement according to the electric equipment test rules; All should carry out commissioning test or regular routine test before putting into operation and after the operation, the excitation characteristic test of voltage transformer (VT) just belongs in the middle of the commissioning test project.Requirement according to the rules, voltage transformer (VT) exciting characteristic curve measurement point is respectively 20%, 50%, 80%, 100% and 120% of rated voltage; For the voltage transformer (VT) of neutral-point solid ground, electric pressure 35kV and following voltage transformer (VT) highest measurement point are 190%; Electric pressure 110kV and above voltage transformer (VT) highest measurement point are 150%.At present; General method of testing is artificial operational testing, in the test site wiring, by manually-operated, reading of data, draw a diagram; Because the action of different tests personnel operation pressure regulator is inconsistent; Also be limited by the sensitivity of pressure regulator, inevitably have operate miss, the collimation error, the measurement result precision is not high; This method takies several testing crews, and the test duration is long, and requires also higher to the skills involved in the labour of testing crew.
The quick proving installation of the utility model, the requirement of collection test regulation utilizes embedded program; By master chip circuit output D/A signal, act on power power-supply, control its output voltage and carry out automatic Regulation; Realize the stepless voltage regulation in the process of the test, and automatic log.
Summary of the invention
The purpose of the utility model is to provide a kind of voltage transformer (VT) excitation property quick proving installation, realizes the robotization of voltage transformer (VT) excitation characteristic test.
The utility model is realized through following technical scheme: device is constituted by earth leakage protective device, power power-supply, D/A controlling output circuit, A/D metering circuit, power supply, E2 storer, USB flash disk interface, master chip circuit, display, control panel; Electric connecting relation between them is: the two-way output of earth leakage protective device is connected to the input of power supply and power power-supply respectively; Another road input of power power-supply is from the D/A output circuit; The output of power power-supply connects the A/D metering circuit; The A/D metering circuit has two-way output; One the tunnel connects both voltage transformer secondary coils of tested device, and another road connects the master chip circuit, the master chip circuit in addition 2 the tunnel import self powered supply and control panel; The master chip circuit has 4 tunnel outputs, corresponding D/A output circuit, E2 storer, USB flash disk interface, display respectively.
The general input and output I/O of master chip circuit mouth PB14, PB15, PD9, PD10, PD11 select input pin to be connected with secondary, opening selection input pin and waver two 1.0Un, 1.5Un, the 1.9Um of control panel medium wave band switch one respectively.
The master chip circuit is connected with voltage input pin U, the electric current input pin I of A/D metering circuit through integrated analog quantity input pin PB0, PB1; It is analog quantity input first passage and second channel that PB0, PB1 are set, and realizes 12 A/D samplings to trial voltage, electric current.
The A/D metering circuit of quick proving installation; Constitute by current transformer, voltage transformer (VT) and 2 rectifying and wave-filtering operational amplifiers; One tunnel output of power power-supply connects the primary winding of voltage transformer (VT); The primary winding other end is connected to tested device, and another road output of power power-supply connects the primary winding of current transformer, another termination tested device of primary winding; The output of voltage transformer (VT), current transformer connects the input end of 2 rectifying and wave-filtering operational amplifiers respectively, and its output is connected to the master chip circuit.
The electric connecting relation of master chip circuit also comprises: the integrated SPI1 mouth of the kernel PD2 of the CS of E2 storer, SI, SO, SCK pin and master chip circuit, PD1, PD3, PD0 terminal join; The integrated SPI2 mouth of the kernel PA2 of the CS of USB flash disk interface, SI, SO, SCK pin and master chip circuit, PC4, PA7, PA6 pin join; The CS of D/A output circuit, SI, SO, SCK pin, correspondence connect PD12, PD13, PD14, the PD15 pin of master chip circuit SPI3 mouth.
On the control panel of quick proving installation; USB flash disk/printer output mouth of conveniently asking for metrical information also is installed; Two waveres that selection operation is used, 4 function manipulation keys (confirm, printing, time-out, ESC Escape), display, power interface, air switch and output interface.
Owing to the quick proving installation of this voltage transformer (VT) excitation property is to combine the electric equipment test rules to design, device practical, convenient can satisfy the actual needs of testing ground.
Description of drawings
Fig. 1 is the total block scheme of the quick proving installation of voltage transformer (VT) excitation property;
In the drawings, 1-earth leakage protective device, 2-power power-supply, 3-D/A controlling output circuit, 4-A/D metering circuit, 5-power supply, 6-E2 storer, 7-USB flash disk memory interface circuit, 8-master chip circuit, 9-display, 10-control panel;
Fig. 2 is the master chip wiring diagram;
Fig. 3 is A/D metering circuit figure;
In the drawings, 11-current transformer, 12-voltage transformer (VT), 13,14-rectifying and wave-filtering operational amplifier;
Fig. 4 is the power power-supply wiring diagram;
Fig. 5 is the control panel synoptic diagram;
In the drawings, 15-display, 16-power interface, 17-air switch, 18-output interface.
Embodiment
Below in conjunction with accompanying drawing the utility model is done further explain:
Can know by Fig. 1; This quick proving installation is made up of earth leakage protective device 1, power power-supply 2, D/A controlling output circuit 3, A/D metering circuit 4, power supply 5, E2 storer 6, USB flash disk memory interface circuit 7, master chip circuit 8, display 9, control panel 10 and the box body combinations that takes up components and parts; Annexation between electric, the electronic component is: the two-way output of earth leakage protective device 1 is connected to the input of power supply 5 and power power-supply 2 respectively; Another road input of power power-supply 2 is from D/A output circuit 3; The output of power power-supply 2 connects A/D metering circuit 4, and A/D metering circuit 4 has two-way output, and one the tunnel connects tested voltage transformer secondary coil; Another road connects master chip circuit 8, master chip circuit 8 in addition 2 the tunnel import self powered supply 5 and control panel 10; Master chip circuit 8 has 4 tunnel outputs, respectively corresponding D/A output circuit 3, E2 storer 6, USB flash disk interface 7, display 9.
Visible by Fig. 2, proving installation uses master chip ARM (adopting the STM32F107VCT6 type), and the PD2 of the integrated SPI1 mouth of kernel, PD1, PD3, PD0 pin are connected with CS, SI, SO, the SCK pin hardware of E2 storer respectively; It is full duplex master mode of operation that the SPI1 mouth is set, and realizes that speed is the data transmission of 1M/S; Utilize 32k byte space storage AD calibration factor and 100 historical records of E2 storer.
Master chip is connected to the USB flash disk memory interface circuit: the PA2 of the integrated SPI2 mouth of master chip ARM kernel, PC4, PA7, PA6 pin are connected with CS, SI, SO, the SCK pin hardware of USB flash disk control chip CH376 chip respectively.It is full duplex master mode of operation that the SPI2 mouth is set, and realizes that speed is the data transmission of 1M/S; Utilize the built-in reading and writing of files journey function library of CH376, realize the USB flash disk upload function of 100 historical records.
Master chip is connected to the D/A output circuit: the PD12 of the integrated SPI3 mouth of master chip ARM kernel, PD13, PD14, PD15 pin are connected with CS, SI, SO, the SCK stiffness of foot in children spare of D/A chip MAX531 respectively; It is full duplex master mode of operation that the SPI3 mouth is set, and realizes that speed is the data transmission of 100K/S.Utilize the D/A output function of MAX531, generate 0～5V DC voltage, accomplish D/A input control power model up to 12 bit resolutions.Realize the function of power model output voltage rise and fall.
Master chip is connected to display: PE10, the PE11 pin of the inner integrated USART1 mouth of master chip ARM are connected with LCD-DIN, the LCD-DOUT stiffness of foot in children spare of Liquid Crystal Module respectively, and the PE15 input mode that is configured to open a way is connected with Liquid Crystal Module LCD-BUSY stiffness of foot in children spare.The USART1 mouth be set be the half-duplex state of 115200 baud rates, 8 data bit, 1 position of rest, no parity check position; That realizes test findings tables of data and oscillogram refreshes demonstration in real time.
Master chip is connected to control panel: the general input and output I/O mouth PB14 of master chip ARM, PB15, PD9, PD10, PD11 carry out hardware and are connected with secondary, opening selection input pin and waver two 1.0Un, 1.5Un, the 1.9Um selection input pin of control panel medium wave band switch one respectively.5 I/O mouths that connection is set draw input pattern on being, program is confirmed the waver state through reading the I/O input register, are used to be provided with test specimen type and test ceiling voltage.
Master chip is connected to the A/D metering circuit: the inner integrated analog quantity input pin PB0 of master chip ARM, PB1 are connected with voltage input pin U, the electric current input pin I hardware of A/D metering circuit; It is analog quantity input first passage and second channel that PB0, PB1 are set, and opens conversion continuously; Realization is to 12 A/D samplings of trial voltage, electric current.
Visible by Fig. 3; A/D metering circuit 4 is made up of current transformer 11 (adopting TA5211), voltage transformer (VT) 12 (adopting TV3154) and 2 rectifying and wave-filtering operational amplifiers 13,14 (adopting LM324); One tunnel output of power power-supply 2 connects the primary winding of voltage transformer (VT) 12, and the coil other end is connected to tested device, and another road output of power power-supply 2 connects the primary winding of current transformer 11; Another termination tested device of its coil; Voltage transformer (VT) 12, the output of current transformer 11 connects the input end of rectifying and wave-filtering operational amplifier 13 and 14, and its output is connected to master chip circuit 8.
Visible by Fig. 4, the input of power power-supply is from earth leakage protective device 1, and two output voltage 1,2 is to A/D metering circuit 4, and control signal is imported from D/A output circuit 3, and power power-supply module adopts HAT2000-220H150-NFCI.
Visible by Fig. 5; On the control panel 10 of device; USB flash disk/printer output mouth of conveniently asking for metrical information also is installed; Two waveres that selection operation is used, 4 function manipulation keys (confirm, printing, time-out, ESC Escape), display 15, power interface 16, air switch 17, output interface 18.
The output of this quick proving installation directly connects tested device; Utilize embedded program to boost by 0V; Stepped voltage with 1V is carried out the measurement of various combination to 7 magnitude of voltage measurement points such as 0.2Un, 0.5Un, 0.8Un, 1.0Un, 1.2Un, 1.5Un, 1.9Um respectively, automatically the result is shown and is stored on the relevant device; The compact conformation of device, measuring accuracy is high, simple operation.
The whole devices and the control panel of this quick proving installation are installed in the portable hand suitcase; Elements such as the electronics that device is selected for use, electrical equipment; All select electrician general in the international standard, electronic devices and components for use, the concrete wiring of each element is carried out by the element requirement, does not do detailed explanation at this.
Claims (4)
1. quick proving installation of voltage transformer (VT) excitation property; It is characterized in that: said device is constituted by the electric connecting relation of setting by earth leakage protective device (1), power power-supply (2), D/A controlling output circuit (3), A/D metering circuit (4), power supply (5), E2 storer (6), USB flash disk interface (7), master chip circuit (8), display (9), control panel (10); Circuit between them is connected to: the two-way output of earth leakage protective device (1) is connected to the input of power supply (5) and power power-supply (2) respectively; Another road input of power power-supply (2) is from D/A output circuit (3); The output of power power-supply (2) connects A/D metering circuit (4); A/D metering circuit (4) has two-way output; One the tunnel connects both voltage transformer secondary coils of tested device, and another road connects master chip circuit (8), master chip circuit (8) in addition 2 the tunnel import self powered supply (5) and control panel (10); Master chip circuit (8) has 4 tunnel outputs, corresponding D/A output circuit (3), E2 storer (6), USB flash disk interface (7), display (9) respectively;
The general input and output I/O of master chip circuit (8) mouth PB14, PB15, PD9, PD10, PD11 select input pin to be connected with secondary, opening selection input pin and waver two 1.0Un, 1.5Un, the 1.9Um of control panel (10) medium wave band switch one respectively;
Master chip circuit (8) is connected with voltage input pin U, the electric current input pin I of A/D metering circuit (4) through integrated analog quantity input pin PB0, PB1; It is analog quantity input first passage and second channel that PB0, PB1 are set, and realizes 12 A/D samplings to trial voltage, electric current.
2. the quick proving installation of voltage transformer (VT) excitation property according to claim 1; It is characterized in that: A/D metering circuit (4) is made up of current transformer (11), voltage transformer (VT) (12) and 2 rectifying and wave-filtering operational amplifiers (13), (14); One tunnel output of power power-supply (2) connects the primary winding of voltage transformer (VT) (12); The primary winding other end is connected to tested device; Another road output of power power-supply (2) connects the primary winding of current transformer (11), another termination tested device of primary winding, voltage transformer (VT) (12); The output of current transformer (11) connects the input end of rectifying and wave-filtering operational amplifier (13) and (14), and its output is connected to master chip circuit (8).
3. the quick proving installation of voltage transformer (VT) excitation property according to claim 1 is characterized in that: the electric connecting relation of master chip circuit (8) also comprises: the integrated SPI1 mouth of the kernel PD2 of the CS of E2 storer (6), SI, SO, SCK pin and master chip circuit (8), PD1, PD3, PD0 terminal join; The integrated SPI2 mouth of the kernel PA2 of the CS of USB flash disk interface (7), SI, SO, SCK pin and master chip circuit (8), PC4, PA7, PA6 pin join; The CS of D/A output circuit (3), SI, SO, SCK pin, correspondence connect PD12, PD13, PD14, the PD15 pin of master chip circuit (8) SPI3 mouth.
4. the quick proving installation of voltage transformer (VT) excitation property according to claim 3; It is characterized in that: on the control panel (10) of said device, USB flash disk/printer output mouth of conveniently asking for metrical information is installed, 2 waveres that selection operation is used; 4 function manipulation keys; Display (15), power interface (16), air switch (17) and output interface (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120519896 CN202393849U (en) | 2011-12-14 | 2011-12-14 | Excitation characteristic quick testing device of voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120519896 CN202393849U (en) | 2011-12-14 | 2011-12-14 | Excitation characteristic quick testing device of voltage transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202393849U true CN202393849U (en) | 2012-08-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120519896 Expired - Fee Related CN202393849U (en) | 2011-12-14 | 2011-12-14 | Excitation characteristic quick testing device of voltage transformer |
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| Country | Link |
|---|---|
| CN (1) | CN202393849U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103487705A (en) * | 2013-10-12 | 2014-01-01 | 江苏思源赫兹互感器有限公司 | Quality control method for excitation characteristics of C-type iron core voltage transformer |
| CN109655777A (en) * | 2019-01-15 | 2019-04-19 | 昆明理工大学 | A kind of method and device for distribution PT magnetic saturation nargin performance of testing and assessing |
| CN110672958A (en) * | 2019-10-15 | 2020-01-10 | 云南电网有限责任公司文山供电局 | Test device for testing excitation characteristic of voltage transformer |
| CN111257817A (en) * | 2020-01-17 | 2020-06-09 | 广西电网有限责任公司桂林供电局 | Method for testing excitation characteristic of voltage transformer |
| CN111474430A (en) * | 2020-04-20 | 2020-07-31 | 广东电网有限责任公司 | Excitation characteristic testing device of voltage transformer |
-
2011
- 2011-12-14 CN CN 201120519896 patent/CN202393849U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103487705A (en) * | 2013-10-12 | 2014-01-01 | 江苏思源赫兹互感器有限公司 | Quality control method for excitation characteristics of C-type iron core voltage transformer |
| CN103487705B (en) * | 2013-10-12 | 2016-03-23 | 江苏思源赫兹互感器有限公司 | A kind of C shaped iron core voltage transformer (VT) excitation property method of quality control |
| CN109655777A (en) * | 2019-01-15 | 2019-04-19 | 昆明理工大学 | A kind of method and device for distribution PT magnetic saturation nargin performance of testing and assessing |
| CN110672958A (en) * | 2019-10-15 | 2020-01-10 | 云南电网有限责任公司文山供电局 | Test device for testing excitation characteristic of voltage transformer |
| CN111257817A (en) * | 2020-01-17 | 2020-06-09 | 广西电网有限责任公司桂林供电局 | Method for testing excitation characteristic of voltage transformer |
| CN111474430A (en) * | 2020-04-20 | 2020-07-31 | 广东电网有限责任公司 | Excitation characteristic testing device of voltage transformer |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120822 Termination date: 20171214 |
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| CF01 | Termination of patent right due to non-payment of annual fee |