CN210270121U

CN210270121U - Short circuit test system between winding strands

Info

Publication number: CN210270121U
Application number: CN201920585922.1U
Authority: CN
Inventors: 陈梁远; 赵坚; 余长厅; 张玉波; 张磊
Original assignee: Electric Power Research Institute of Guangxi Power Grid Co Ltd
Current assignee: Electric Power Research Institute of Guangxi Power Grid Co Ltd
Priority date: 2019-04-26
Filing date: 2019-04-26
Publication date: 2020-04-07
Anticipated expiration: 2029-04-26

Abstract

The utility model discloses a short circuit test system between winding thigh, the on-line screen storage device comprises a host computer, measuring module, variable frequency power supply and temperature sensor, host computer and measuring module wireless connection, variable frequency power supply is connected with external power source through first cable, variable frequency power supply is connected and provides the required wide band voltage of measurement or electric current to the second cable through the second cable with the equipment under test, temperature sensor installs the temperature that is used for measuring the equipment under test on the equipment under test and with host computer wireless connection, measuring module and second cable junction measure the voltage and the electric current of second cable, the host computer receives measuring module and temperature sensor's measuring result and carries out the calculation. The utility model discloses set up variable frequency power supply and temperature sensor to adopt the wireless connection mode, can carry out the test of high frequency low-voltage undercurrent at the scene, equipment is simple moreover, and operation safety, convenience provide an effective method for the quick accurate measurement of short-circuit fault between the winding thigh.

Description

Short circuit test system between winding strands

Technical Field

The utility model relates to a power equipment detects technical field, especially relates to a short circuit test system between winding thigh.

Background

A transformer or a reactor is an electric device composed of a winding, an iron core, a sleeve, and the like, in which the winding is a main component. When the winding has faults such as short circuit between strands, the transformer operation process is abnormal if the fault is light, and the transformer is damaged or exploded if the fault is heavy, so that great loss is caused to a power grid. The winding is subjected to inter-strand short circuit test, so that whether the winding is normal or not can be judged, the problems of the winding can be found as soon as possible, measures are taken in advance, and the hidden danger of equipment is eliminated. When the short circuit occurs between strands of the transformer, the skin effect at the short circuit position of the transformer is obvious, the generated additional loss is increased, the skin effect is closely related to the frequency, and the loss generated by the skin effect can be obviously improved by improving the voltage frequency. At present, both a short-circuit test method and a no-load test method adopted on site need to be carried out at a power frequency of 50Hz and a rated current of about hundreds of amperes or a rated voltage of more than thousands of volts, equipment requirements are high, measurement accuracy is low, and a test system capable of carrying out on-site measurement is urgently needed.

SUMMERY OF THE UTILITY MODEL

The utility model provides a can carry out short circuit test system between winding thigh of high frequency low-voltage undercurrent test at the scene.

In order to achieve the above object, the embodiments of the present invention adopt the following technical solutions:

the utility model provides a winding intertwist short-circuit test system, includes host computer, measuring module, variable frequency power supply and temperature sensor, the host computer with measuring module wireless connection, variable frequency power supply is connected with external power source through first cable, variable frequency power supply pass through the second cable with be equipped with and be connected and to the second cable provides the required wide band voltage of measurement or electric current, temperature sensor install on being equipped with by the examination equipment be used for measuring by the temperature of equipment and with host computer wireless connection, measuring module with second cable junction and measurement the voltage and the electric current of second cable, the host computer is received measuring module with temperature sensor's measuring result carries out the calculation.

Further, the host computer includes host computer treater, display screen, host computer switch, receiver, host computer battery and host computer shell, host computer treater, receiver and host computer battery set up inside the host computer shell, display screen and host computer switch set up on the host computer shell, display screen and receiver with the host computer treater is connected, the host computer battery connects gradually with host computer switch and host computer treater.

Further, the measuring module comprises a voltage transformer, a current transformer, an acquisition module, a transmitter, a module processor, a module battery, a module switch and a module shell, wherein the voltage transformer, the acquisition module, the transmitter, the module processor and the module battery are arranged inside the module shell, the current transformer is arranged outside the module shell, the module switch is arranged on the module shell, the voltage transformer and the current transformer are respectively connected with the acquisition module, the acquisition module and the transmitter are connected with the module processor, the module battery is sequentially connected with the module switch and the module processor, and the receiver is wirelessly connected with the transmitter.

Furthermore, the output of the variable frequency power supply is a three-phase power supply, the voltage of each phase is 0-300V, the current of each phase is 0-24A, and the frequency is 0-1500 Hz.

Further, temperature sensor is for magnetic attraction formula wireless temperature sensor, the receiver with temperature sensor wireless connection. The magnetic wireless temperature sensor avoids risks caused by wiring and low efficiency caused by taking up and paying off wires.

The utility model has the advantages that: the utility model discloses utilize variable frequency power supply to provide the power of high frequency low-voltage undercurrent and apply on the equipment under test, measure winding loss and transformer oil temperature respectively through measuring module, temperature sensor, then calculate and show through the host computer, have characteristics such as operation safety, convenience, be applicable to the field measurement.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a schematic diagram of an embodiment of the present invention.

Wherein the labels shown in the figures are: 1: host, 2: measurement module, 3: variable frequency power supply, 4: first cable, 5: second cable, 6: temperature sensor, 7: device under test, 8: power supply, 11: host processor, 12: display screen, 13: host switch, 14: receiver, 15: host battery, 16: host housing, 21: voltage transformer, 22: current transformer, 23: acquisition module, 24: emitter, 25: module processor, 26: module battery, 27: module switch, 28: and a module housing.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1, the utility model provides a short circuit test system between winding strands, including host computer 1, measuring module 2, variable frequency power supply 3, first cable 4, second cable 5 and temperature sensor 6. Host computer 1 and measurement module 2 wireless connection, variable frequency power supply 3 is connected with external power supply through first cable 4, variable frequency power supply 3 is connected with the equipment under test and provides the required wide band voltage of measurement or electric current to second cable 5 through second cable 5, temperature sensor 6 installs the temperature that is used for measuring the equipment under test and with host computer 1 wireless connection on the equipment under test, measurement module 2 is connected with second cable 5 and measures the voltage and the electric current of second cable 5, host computer 1 receives the measuring result of measurement module 2 and temperature sensor 6 and calculates. The temperature sensor 6 is a magnetic wireless temperature sensor, preferably, the temperature sensor 6 is in the model number Wtem756 and adopts a Zigbee wireless communication mode. The output of the variable frequency power supply 3 is a three-phase power supply, the voltage of each phase is 0-300V, the current of each phase is 0-24A, the frequency is 0-1500 Hz, and preferably, the model of the variable frequency power supply 3 is IT 7627.

The host 1 includes a host processor 11, a display 12, a host switch 13, a receiver 14, a host battery 15, and a host housing 16. The host processor 11, receiver 14 and host battery 15 are inside the host housing 16, and the display 12 and host switch 13 are disposed on the host housing 16. The display screen 12 and the receiver 14 are connected to the host processor 11, the host processor 11 receives and stores voltage, current, and temperature information from the receiver 14, and performs power calculation at the current temperature, the display screen 12 displays voltage, current, temperature, and power values, preferably, the host processor 11 is of model MSP430F6638, the receiver 14 is of model CC2520, the host battery 15 is connected to the host switch 13 and the host processor 11 in sequence, the host battery 15 supplies power to the host processor 11, and the host switch 13 turns on/off the power supply of the host battery 15.

The measurement module 2 comprises a voltage transformer 21, a current transformer 22, an acquisition module 23, a transmitter 24, a module processor 25, a module battery 26, a module switch 27 and a module housing 28. The voltage transformer 21, the acquisition module 23, the transmitter 24, the module processor 25 and the module battery 26 are inside the module housing 28, the current transformer 22 is outside the module housing 28, the current transformer 22 is a perforated current transformer, and the module switch 27 is disposed on the module housing 28. The voltage transformer 21 and the current transformer 22 are respectively connected with the acquisition module 23, the voltage transformer 21 and the current transformer 22 respectively measure the voltage and the current in the second cable 5, the acquisition module 23 respectively acquires the voltage value and the current value of the voltage transformer 21 and the current transformer 22, the acquisition module 23 and the transmitter 24 are connected with the module processor 25, the module processor 25 receives the voltage and the current information from the acquisition module 23 and transmits the information to the receiver 14 through the transmitter 24, the module battery 26 is sequentially connected with the module switch 27 and the module processor 25, the module battery 26 supplies power to the module processor 25, the module switch 27 switches on/off the power supply of the module battery 26, preferably, the module processor 25 is of model MSP430F6638, the transmitter 24 is of model CC2520, the voltage transformer 21 is of model HVS-EVS-500P4O9, the current transformer 22 is of model HCS-LTR-100Ach, the model of the acquisition module 23 is AD 7606. The receiver 14 is wirelessly connected to the transmitter 24 and the temperature sensor 6.

When in use, referring to fig. 2, under the condition that the power supply 8 is disconnected, the first cable 4 is connected with the power supply 8, the current transformer 22 is sleeved on the second cable 5 and can measure the current in the second cable 5, the second cable 5 is connected with the variable frequency power supply 3 and the device under test 7, the temperature sensor 6 is powered on and attached to the upper surface of the device under test 7, the temperature sensor 6 can measure the upper layer temperature of the device under test 7, the voltage transformer 21 is connected with the output of the variable frequency power supply 3 or the joint of the second cable 5, the voltage transformer 21 can measure the voltage of the second cable 5, the power supply 8 is powered on, the host switch 13 and the module switch 27 are sequentially powered on, at this time, the host processor 11 and the module processor 25 are started, the acquisition module 23 receives the voltage information of the voltage transformer 21 and the current information of the current transformer 22, the emitter 24 and the module processor 25 receive the information of the acquisition module 23 and send the information through the emitter 24, the receiver 14 receives information of the transmitter 24 and the temperature sensor 6, displays a voltage value, a current value and a temperature value on the display screen 12, then switches on the variable frequency power supply 3, the variable frequency power supply 3 can output variable voltage, current and frequency, then sets the voltage of the variable frequency power supply 3 between 0-300V, the current between 0-24A and the frequency between 0-1500 Hz, for example, sets the voltage to 150V, the frequency to 50, 100, 200, 20, 1500Hz and the maximum current to 24A, and then the measurement results of the voltage, the current and the temperature and the calculation results of the power under different voltages or frequencies can be observed through the display screen 12. By the mode, the inter-winding short circuit test of the high-frequency low-voltage small current test can be realized on site.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A winding intertwist short circuit test system is characterized in that: including host computer (1), measuring module (2), variable frequency power supply (3) and temperature sensor (6), host computer (1) with measuring module (2) wireless connection, variable frequency power supply (3) are connected with external power source through first cable (4), variable frequency power supply (3) are connected and to with the equipment under test through second cable (5) provide the required wide band voltage of measurement or electric current, temperature sensor (6) install on the equipment under test be used for measuring the temperature of equipment under test and with host computer (1) wireless connection, measuring module (2) with second cable (5) are connected and are measured the voltage and the electric current of second cable (5), host computer (1) is received measuring module (2) with the measuring result of temperature sensor (6) carries out the calculation.

2. The winding intertwist short circuit test system of claim 1, wherein: host computer (1) includes host computer treater (11), display screen (12), host computer switch (13), receiver (14), host computer battery (15) and host computer shell (16), host computer treater (11), receiver (14) and host computer battery (15) set up inside host computer shell (16), display screen (12) and host computer switch (13) set up on host computer shell (16), display screen (12) and receiver (14) with host computer treater (11) are connected, host computer battery (15) and host computer switch (13) and host computer treater (11) connect gradually.

3. The winding intertwist short circuit test system of claim 2, wherein: the measuring module (2) comprises a voltage transformer (21), a current transformer (22), an acquisition module (23), a transmitter (24), a module processor (25), a module battery (26), a module switch (27) and a module shell (28), wherein the voltage transformer (21), the acquisition module (23), the transmitter (24), the module processor (25) and the module battery (26) are arranged inside the module shell (28), the current transformer (22) is arranged outside the module shell (28), the module switch (27) is arranged on the module shell (28), the voltage transformer (21) and the current transformer (22) are respectively connected with the acquisition module (23), the acquisition module (23) and the transmitter (24) are connected with the module processor (25), the module battery (26) is sequentially connected with the module switch (27) and the module processor (25), the receiver (14) is wirelessly connected to the transmitter (24).

4. The winding intertwist short circuit test system of claim 1, wherein: the output of the variable frequency power supply (3) is a three-phase power supply, the voltage of each phase is 0-300V, the current of each phase is 0-24A, and the frequency is 0-1500 Hz.

5. The winding intertwist short circuit test system of claim 2, wherein: temperature sensor (6) are for inhaling the wireless temperature sensor of formula, receiver (14) with temperature sensor (6) wireless connection.