CN213457265U - PT high-voltage fuse slow-melting monitoring device - Google Patents
PT high-voltage fuse slow-melting monitoring device Download PDFInfo
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- CN213457265U CN213457265U CN202022681474.0U CN202022681474U CN213457265U CN 213457265 U CN213457265 U CN 213457265U CN 202022681474 U CN202022681474 U CN 202022681474U CN 213457265 U CN213457265 U CN 213457265U
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Abstract
The utility model provides a PT high-voltage fuse slow melting monitoring device, which comprises a host and a monitoring module, wherein a control unit is arranged in the monitoring module, the control unit is connected with an infrared thermal imaging unit, a vibration detection unit and a measurement acquisition unit, a processor is arranged in the host, and the processor is connected with a display unit and an alarm unit; the control unit is wirelessly connected with the processor. The utility model discloses can 1PT in the real-time supervision generator outlet voltage transformer (PT) cabinet, 2PT, 3PT high pressure insurance and contact temperature and real-time supervision PT secondary side output voltage value, compare analysis 1PT through the treater, 2PT, 3PT secondary voltage pressure difference value and each alternate pressure difference compare data and the temperature data arrangement that each infrared thermal imagery unit acquireed is compared, send alarm information when reaching the settlement alarm value, the emergence of prevention high pressure PT insurance melting slowly.
Description
Technical Field
The utility model belongs to the technical field of the electricity generation controlling means is relevant, concretely relates to generator terminal voltage transformer once high-voltage fuse melts monitoring devices slowly.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
When the power of the generator is protected, monitored and controlled, the data of voltage, power, phase, power factor and the like all depend on the secondary voltage signal at the generator terminal, the secondary voltage signal provided by a voltage transformer at the generator outlet terminal is needed, and the automatic power generation control system also adjusts the power output of the generator according to the power measurement condition of the generator.
Case one: in a power plant 2019, 2, 10, and 10 nights, a centralized control operator finds that the active power of the #5 machine excitation regulator control panel shows that the deviation exists between the active power of the unit and the actual active power. And (3) on-site measurement of maintainers finds that the phase B of the terminal voltage of the #5 machine is relatively low, phase measurement and infrared temperature measurement are further carried out, and analysis confirms that the slow melting phenomenon of the phase B fuse of the phase 2PT at the terminal of the #5 machine occurs, so that the major potential safety hazard of tripping of a unit exists. In the UNTROL F type device manufactured by ABB corporation used in #5 machine excitation regulator, the voltage used in the channel I, II is supplied from terminals 2PT and 1PT, respectively, and the channel runs in channel I. At night of 2 months and 10 days, centralized control operators find that the active power of a display unit of a control panel of the #5 machine excitation regulator is 85MW, the active power of an actual unit is 90MW, and the display of an excitation system has deviation from the load of the actual unit. It was measured that the terminal voltages A, C of the #5 machine excitation regulator are 57.7V and B is 48.9V, and the power deviation is caused by the low phase voltage B. And measuring the root voltage of the 2PT at the #5 machine end, wherein the value is consistent with the value, and the primary judgment is that the primary side of the 2PT at the #5 machine end is abnormal. The phase sequence of the secondary side voltage of the 2PT at the machine end of the #5 machine is measured and still is the positive sequence voltage, and infrared imaging measurement is used, so that the phase B fuse is found to be slightly heated, the temperature is 16.4 ℃, and the temperature is about 8 ℃ higher than that of the phase A and the phase C. After analysis, it is determined that the primary side fuse of the terminal 2PT is not completely fused and a slow fusing phenomenon occurs.
Case two: a power plant generates active 468MW and reactive 63MVar of a #4 unit in 2019, 7, 10, 12, 30, and DCS pictures of 'generating and transforming protection A cabinet device alarm', 'generating and transforming protection PT disconnection' light character plate flashing, then 'excitation total alarm', 'AVR V/H limiter action', 'rotor overcurrent inverse time limit protection', 'AVC PT disconnection', 'PMU alarm' alarm signals are sent, and ACDF grinds all coal feeders, an electric pump auxiliary oil pump to trip, and a 4B booster fan to be power frequency. Checking the reactive power, active power and generator voltage parameters of the generator set to display abnormity, immediately putting an AB layer oil gun for stable combustion, removing AVC of the #4 generator, reducing reactive load, starting each tripping coal feeder, adjusting the parameters of the generator set to be normal, and operating the #4 generator excitation regulator in a channel 2. The local inspection generator-transformer group protects the A cabinet from 'TV disconnection' alarm. And the local inspection is carried out to protect the A cabinet alarm of 'TV disconnection', the voltage is measured at the terminal row, and the Ua phase voltage is reduced to 22.5V. And a #4 excitation regulator, wherein an LCP control panel displays a Machine P.T.fail alarm, and the excitation regulator is switched from one channel to two channels to operate.
Referring to relevant documents, common reasons for fusing PT high-voltage fuses are:
(1) the movable and static contacts of the primary plug of the outlet voltage transformer are poor in frequent contact of oxide layers due to different materials, and the connecting bolt is loose, so that extra temperature rise is brought to the fuse.
(2) The PT fuse is a metal wire made of a metal material having a low melting point and is exposed to a high temperature environment, and is broken even by external vibration due to its extremely fine size.
(3) The fuse of the PT is deteriorated during a long time operation to be blown.
(4) The fuse of the first side and the second side of the voltage transformer can be fused due to ferromagnetic resonance overvoltage caused by sudden switching-on of a switch, interrupted arc grounding and the like;
(5) the low-frequency saturation current can cause the fuses of the primary side and the secondary side of the voltage transformer to be fused.
(6) Single-phase grounding occurs, causing the voltage transformer to burn out.
(7) The insulation reduction of the primary winding and the secondary winding of the voltage transformer, short circuit fault or insulation reduction of a harmonic eliminator can cause the fuses of the primary side and the secondary side to be fused.
The inventor finds that on one hand, the PT fuse at the machine end is not easy to be found in the process of forming, once the PT fuse occurs, the safe operation of the generator set is influenced, the judgment and elimination time of operators and the judgment and elimination accuracy are directly influenced in the problem elimination processing process, misoperation is easy to occur, the accident range is expanded, and serious accidents such as load reduction, trip and the like are caused.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve above-mentioned problem, provided a PT high pressure insurance monitoring devices that melts slowly, the utility model discloses a monitoring machine end PT high pressure insurance whether has insurance phenomenon of melting slowly, in time discover to melt insurance slowly and form the environment that melts slowly easily, can real-time supervision and judge machine end PT high pressure insurance function of melting slowly and sending out the warning through the device and method.
According to some embodiments, the utility model adopts the following technical scheme:
a PT high-voltage fuse slow-melting monitoring device comprises a host and a monitoring module, wherein a control unit is arranged in the monitoring module and connected with an infrared thermal imaging unit, a vibration detection unit and a measurement acquisition unit; the control unit is wirelessly connected with the processor.
Furthermore, the control unit is also connected with a first Bluetooth transmission unit, and the processor is also connected with a second Bluetooth transmission unit.
Furthermore, the monitoring module further comprises a power supply unit, and the power supply unit is respectively connected with the infrared thermal image unit, the vibration detection unit, the measurement acquisition unit, the control unit and the first Bluetooth transmission unit.
Furthermore, the monitoring modules are arranged in a plurality and are respectively installed in the A-phase generator outlet voltage transformer cabinet, the B-phase generator outlet voltage transformer cabinet and the C-phase generator outlet voltage transformer cabinet.
Further, the host is installed in a safe location where the operation or inspection personnel can observe and reach.
Furthermore, the monitoring module monitors 1PT, 2PT and 3PT high-voltage fuses, contact temperature and secondary side output voltage values in the cabinets of the A-phase, B-phase and C-phase generator outlet voltage transformers in real time.
Furthermore, the measurement acquisition unit is connected with the output end of the secondary side of the generator terminal voltage transformer.
Furthermore, the monitoring module adopts a miniaturized design, and the shell is made of a high-strength nonflammable insulating material.
Further, the processor adopts an ARM chip, and the model is STM32F103VET6 or ATMEGA328P of a 32-bit microcontroller of an STM32 series single chip microcomputer.
Further, the control unit and the measurement acquisition unit adopt STM8L series low-power-consumption nA level units and measurement sampling precision 12-bit ADCs.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses can 1PT in the real-time supervision generator outlet voltage transformer (PT) cabinet, 2PT, 3PT high pressure insurance and contact temperature and real-time supervision PT secondary side output voltage value, compare analysis 1PT through the treater, 2PT, 3PT secondary voltage pressure difference value and each alternate pressure difference compare data and the temperature data arrangement that each infrared thermal imagery unit acquireed is compared, send alarm information when reaching the settlement alarm value, the emergence of prevention high pressure PT insurance melting slowly.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention.
Fig. 1 is a block diagram of the present invention;
FIG. 2 is a schematic view of the installation of the thermal infrared image unit of the present invention;
the system comprises an infrared thermal image unit 1, an infrared thermal image unit 2, a vibration detection unit 3, a measurement acquisition unit 4, a power supply unit 5, a control unit 6, a first Bluetooth transmission unit 7, a second Bluetooth transmission unit 8, a display unit 9, a processor 10 and an alarm unit.
The specific implementation mode is as follows:
the present invention will be further explained with reference to the accompanying drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
As shown in figure 1, the PT high-voltage fuse slow-melting monitoring device comprises a host and monitoring modules, wherein the monitoring modules are respectively installed in an A-phase generator outlet voltage transformer (PT) cabinet, a B-phase generator outlet voltage transformer (PT) cabinet and a C-phase generator outlet voltage transformer (PT) cabinet, and the host is installed in a safe position where an operator or an inspection worker can observe and touch the safe position. The monitoring module adopts the miniaturized design, and the shell adopts the nonflammable insulating material of high strength to make, and the monitoring module embeds there are infrared thermal imagery unit 1, vibrations detecting element 2, measurement acquisition unit 3, the control unit 5, first bluetooth transmission unit 6, power supply unit 4, and the host computer embeds there is treater 9, second bluetooth transmission unit 7, display element 8, alarm unit 10.
The utility model discloses can real-time detection A, B, C three-phase generator export voltage transformer (PT) 1PT in the cabinet, 2PT, 3PT high-pressure insurance and contact temperature, monitoring module is respectively infrared thermal image unit 1 separately, vibrations detecting element 2, measure the processor 9 that collection unit 3 data sent the host computer to through the bluetooth, the processor 9 of host computer is arranged and is compared each monitoring module data, the voltage pressure difference value and each interphase pressure difference that reach A, B, C three-phase generator export voltage transformer secondary side compare data, through infrared thermal image unit 1 measurement homophase 1PT, 2PT, 3PT and the interphase temperature difference value and the vibration condition, send alarm signal when measured data is greater than the setting value and inform the operating personnel, and give the display element with relevant data and show the convenient for reference.
The monitoring module is through the infrared thermal imagery unit 1 of connecting, vibrations detecting element 2, measure the data acquisition unit 3 and obtain relevant data and give the host computer through first bluetooth transmission unit 6 transmission data, the built-in treater 9 of host computer connects second bluetooth transmission unit 7 respectively, display element 8 and alarm unit 10, second bluetooth transmission unit 7 receives the data that come of transmission, when according with the alarm set value after the treater 9 is compared the data arrangement that each module conveys and is judged, send alarm unit to and send alarm signal, display element 8 corresponds the relevant data that show each module conveying.
The measurement acquisition unit 3 is connected with the secondary output end of the generator terminal voltage transformer, the measured voltage value data is sent to the control unit 5, is sent to the second Bluetooth transmission unit 7 through the first Bluetooth transmission unit 6, and is sent to the processor 9 for data processing, so that the generator terminal voltage value is obtained.
The infrared thermal imaging unit 1, the vibration detection unit 2, the measured temperature and the vibration data are sent to the control unit 5, sent to the second Bluetooth transmission unit 7 through the first Bluetooth transmission unit 6 and sent to the processor 9 to process the data, and the data are used for acquiring the temperature of the high-voltage fuse, the stationary contact seat and the contact and the vibration data in the cabinet.
The processor 9 is used for sorting, analyzing and comparing relative data obtained according to 1PT, 2PT and 3PT in the A-phase, B-phase and C-phase three-phase voltage transformer cabinet at the generator end to a fixed value, sending an alarm through the alarm unit 10 when the relative data reach the set value, and sending the data to the display unit 8 for display; prevent the occurrence of slow melting of the high-voltage PT fuse.
The processor 9 can adopt an ARM chip, and the model can be STM32F103VET6 or ATMEGA328P of an STM32 series single chip microcomputer 32-bit microcontroller. The control unit 5 and the measurement acquisition unit 3 can adopt STM8L series low-power-consumption nA level units and measurement sampling precision 12-bit ADCs, the infrared thermal imaging unit 1 can adopt AMG8833 IR 8 multiplied by 8 infrared thermal imaging sensor array temperature measurement units, the vibration detection unit 2 can adopt an aviation level professional algorithm WT31S triaxial vibration sensor, the range +/-2 g awakens the low-power-consumption vibration measurement unit with adjustable sensitivity of 1-128, the display unit 8 can adopt a low-power-consumption section type liquid crystal screen, and the first Bluetooth transmission unit 6 and the second Bluetooth transmission unit 7 can adopt DA14585 Bluetooth 5.0 industry ultra-low-power-consumption PW02 chips of Germany Dialog company.
The utility model provides a monitoring devices is melted slowly to PT high pressure insurance of generator export machine end, whether the PT high pressure insurance of machine end exists insurance and melts the phenomenon slowly, in time discovers melts the environment that insurance and form slowly easily slowly, can real-time supervision and judge the function that PT high pressure insurance of machine end melts slowly and send out the warning through the device.
Meanwhile, according to the actual situation of the site, when the power of the generator is protected, monitored and controlled, the voltage, power, phase, power factor and other data depend on the secondary voltage signal at the generator terminal, the secondary voltage signal provided by a voltage transformer at the generator outlet terminal is needed, the automatic generation control system also adjusts the power output of the generator according to the power measurement condition of the generator, the health state of the generator terminal high-voltage fuse is monitored in real time in view of the importance of the automatic generation control system, the safety hazard is avoided being influenced by the safe operation of the generator set, and the load reduction and the trip accidents of the generator set are avoided.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.
Claims (10)
1. A PT high-voltage fuse slow-melting monitoring device is characterized by comprising a host and a monitoring module, wherein a control unit is arranged in the monitoring module and is connected with an infrared thermal imaging unit, a vibration detection unit and a measurement acquisition unit; the control unit is wirelessly connected with the processor.
2. The PT high-voltage fuse slow-melting monitoring device as claimed in claim 1, wherein the control unit is further connected with a first Bluetooth transmission unit, and the processor is further connected with a second Bluetooth transmission unit.
3. The PT high-voltage fuse slow-melting monitoring device as claimed in claim 2, wherein the monitoring module further comprises a power supply unit, and the power supply unit is respectively connected with the thermal infrared image unit, the vibration detection unit, the measurement acquisition unit, the control unit and the first Bluetooth transmission unit.
4. The PT high-voltage fuse slow-melting monitoring device as claimed in claim 1, wherein a plurality of monitoring modules are arranged and respectively installed in an A-phase generator outlet voltage transformer cabinet, a B-phase generator outlet voltage transformer cabinet and a C-phase generator outlet voltage transformer cabinet.
5. A PT high-voltage fuse slow-melting monitoring device as claimed in claim 1, wherein the main unit is installed in a safe location to be observed and reached by a person operating or inspection.
6. The PT high-voltage fuse slow-melting monitoring device as claimed in claim 1, wherein the monitoring module is arranged in an A-phase, B-phase and C-phase generator outlet voltage transformer cabinet, and monitors 1PT, 2PT, 3PT high-voltage fuses, contact temperature and secondary side output voltage values in the A-phase, B-phase and C-phase generator outlet voltage transformer cabinet in real time.
7. The PT high-voltage fuse slow-melting monitoring device as claimed in claim 1, wherein the measurement acquisition unit is connected with a secondary side output end of a generator terminal voltage transformer.
8. The PT high-voltage fuse slow-melting monitoring device as claimed in claim 1, wherein the monitoring module is miniaturized and the housing is made of high-strength non-flammable insulating material.
9. The PT high-voltage fuse slow-melting monitoring device as claimed in claim 1, wherein the processor adopts ARM chip, microcontroller STM32F103VET6 or ATMEGA328P of 32 bit type STM32 series single chip microcomputer.
10. The PT high-voltage fuse slow-melting monitoring device according to claim 1, wherein the control unit and the measurement acquisition unit adopt STM8L series low-power-consumption nA level units and measurement sampling precision 12-bit ADCs.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022681474.0U CN213457265U (en) | 2020-11-18 | 2020-11-18 | PT high-voltage fuse slow-melting monitoring device |
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| CN202022681474.0U CN213457265U (en) | 2020-11-18 | 2020-11-18 | PT high-voltage fuse slow-melting monitoring device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113671423A (en) * | 2021-07-22 | 2021-11-19 | 中国大唐集团科学技术研究院有限公司华东电力试验研究院 | Fuse fault detection device |
| CN113899455A (en) * | 2021-08-18 | 2022-01-07 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | PT one-time fuse slow-melting monitoring device and method |
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2020
- 2020-11-18 CN CN202022681474.0U patent/CN213457265U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113671423A (en) * | 2021-07-22 | 2021-11-19 | 中国大唐集团科学技术研究院有限公司华东电力试验研究院 | Fuse fault detection device |
| CN113899455A (en) * | 2021-08-18 | 2022-01-07 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | PT one-time fuse slow-melting monitoring device and method |
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