CN202975272U - On-line monitoring device for connecting and disconnecting time of high voltage breaker - Google Patents
On-line monitoring device for connecting and disconnecting time of high voltage breaker Download PDFInfo
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- CN202975272U CN202975272U CN 201220644293 CN201220644293U CN202975272U CN 202975272 U CN202975272 U CN 202975272U CN 201220644293 CN201220644293 CN 201220644293 CN 201220644293 U CN201220644293 U CN 201220644293U CN 202975272 U CN202975272 U CN 202975272U
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Abstract
An on-line monitoring device for connecting and disconnecting time of a high voltage breaker comprises a monitoring device, a main control panel, a communication front-end processor and a host computer. The on-line monitoring device is characterized in that the monitoring device is divided into two parts, a monitoring device I is provided with the main control panel, a high speed data processing unit, a DSP 2812 and a logic signal processing unit CPLD, an output interface of the main control panel is respectively connected with a main computer, waveform output, a network communication interface and a watchdog, a current measuring port and a stroke measuring port of the monitoring device are respectively connected with the breaker, a current measuring port and a stroke measuring port of a monitoring device II are respectively connected with a breaker II, and the monitoring device I and the monitoring device II are connected with the communication front-end processor and the host computer through a CAN bus. According to the on-line monitoring device, a photoelectric current sensor is employed to measure various current signals in a real-time manner, the signals are transmitted to a digital processing unit module through optical fiber communication under an IEC 61850 protocol, and the international general object-oriented language C++ is employed for programming, thereby measuring connecting and disconnecting time of the breaker on line and diagnosing faults of the breaker.
Description
Technical field:
The utility model relates to the on-Line Monitor Device of transformer station's primary cut-out, particularly the on-Line Monitor Device of cut-offfing, closing the time of closing and fault diagnosis of primary cut-out under the IEC61850 of International Electrotechnical Commission communication protocol.
Background technology:
In substation equipment, primary cut-out quantity is maximum, maintenance workload is huge, and current primary cut-out is carried out Maintenance Mode, has basically replaced traditional scheduled overhaul pattern fully.For improving the specific aim of maintenance, need to grasp in real time the performance quality of isolating switch self, in time find the defective of primary cut-out in service, in recent years, under the IEC61850 communication protocol, on-line monitoring technique requires more and more higher to the monitoring of mechanical characteristic of high-voltage circuit breaker and electrical specification.Particularly primary cut-out cut-off and time module is closed in the pass, it not only can obtain the status information of high-voltage circuit-breaker switching on-off electromagnet performance, operating mechanism and kinematic train, and can be convenient to analyze the variation tendency of sentencing primary cut-out key property parameter, enable the health status of accurate evaluation equipment, for the repair based on condition of component strategy provides basis of compilation.Therefore measure primary cut-out and close and close and switch off time, very necessary.
Define according to People's Republic of China's power industry standard " ac hv breaker parameters selection guide rule " DL/T615-1997: concerning isolating switch, operation in every not charged situation is called separating brake and combined floodgate, and the operation in every charged situation calls off disconnected and close the pass.Difference between them is there is no arc time and pre arcing time when not charged, and should notice that arc extinguishing moment and prebreakdown moment is different in the three-phase situation in three-phase, cut-off the monitoring of closing the time with the pass for contact of breaker, present existing technology has:
1, adopt outside current transformer, get moment that last phase current of isolating switch major loop has or not as the contact of breaker deciliter complete moment.The defective that this method exists is: (1) must have the existence of load current, in case operating process is not loaded, just can not monitor the existence of electric current, causes and can't locate; (2) precision in the affects isolating switch deciliter complete moment of the threshold value of judgement electric current existence.
2, add vibration transducer, adopt and judge the isolating switch deciliter complete moment based on mechanical oscillation signal.
Acceleration transducer is generally used in the collection of vibration signal, and acceleration transducer converts the contact vibration signal to charge signal, converts voltage signal to by charge amplifier, then obtains desired signal by the resonance and demodulation device.But the analysis to the contact of breaker vibration signal is the difficult point of mechanical property monitoring, disperse, reflection and refraction due to primary cut-out operation vibrations and various neighbourhood noise, signal, make the vibration signal that sensor obtains have interference component, the more difficult identification of small-signal.When the instantaneous amplitude of undesired signal and frequency reach can compare with vibration signal the time, use conventional methods and be difficult to effectively distinguish noise and useful signal.Shortcoming is to need a plurality of acceleration sensors to be placed on different positions.The analysis breaker operation mechanism vibration signal shortcomings such as employing frequency domain analysis, zoom spectrum analysis method are that the time signal of reflection is inadequate.
3. having document to propose monitoring prebreakdown this problem constantly, is to utilize the high voltage display device that is arranged on together with primary cut-out on switch cubicle to measure the contact of breaker divide-shut brake constantly.When power circuit was charged, capacitive transducer induced voltage by field coupled, and showed having or not of voltage signal by electrification display.Shortcoming is that to measure pre arcing time and the arc time error of isolating switch larger.
In a word, recommend to comprise at present the isolating switch on-Line Monitor Device of having used, exist shortcoming separately, especially isolating switch is cut-off the arc time of main circuit and close the monitoring of the pre arcing time close main circuit inadequate, majority can only carry out divide-shut brake monitoring actuation time of isolating switch when not charged.
Summary of the invention:
Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art, provide a kind of fast, the Measurement accuracy primary cut-out cut-offs the on-Line Monitor Device of closing the time with the pass, effectively carry out isolating switch and cut-off the on-line monitoring that closes the time with the pass.
The technical scheme that the utility model technical solution problem adopts is as follows:
a kind of primary cut-out cut-offs the on-Line Monitor Device of closing the time with the pass, by monitoring device, master control borad, prepositive communication computer and host computer consist of, it is characterized in that: monitoring device divides two parts, be provided with master control borad on monitoring device I, the high-speed data processing unit, DSP2812, logical signal processing unit CPLD, the master control borad output interface respectively with host computer, waveform output, network communication interface, house dog is connected, the current measurement of monitoring device, the stroke measurment port is connected with isolating switch respectively, the current measurement of monitoring device II, the stroke measurment port is connected with isolating switch II respectively, monitoring device I, II is connected with host computer with prepositive communication computer by the CAN bus.
The utility model adopts optical current transformer to measure in real time various current signals, under the IEC61850 stipulations by fiber-optic communications traffic to the digital processing element module; Utilize wavelet analysis technology, extract the various signal waveforms in the loop current waveform, recycle quick Fu Li industry conversion FFT deal with data, carrying out isolating switch cut-offs and the analyzing and processing of closing the various current waveforms in the closing operation process, high-speed data processing unit DSP2812 and logical signal processing unit CPLD are the hardware components of digital processing element, adopt international object oriented language C++ to write, the time is closed in cut-offfing with the pass of on-line measurement isolating switch, carries out the circuit breaker failure diagnosis.
Implementation result of the present utility model is as follows:
1, utilize the remote signalling sampling of current signal, obtain that isolating switch cut-offs and conducting constantly, comprise expectation in the primary cut-out making process that is incorporated into the power networks and wear arc time in time and separating brake process, make the isolating switch dynamic perfromance monitor that science is accurate more.
2, adopt wavelet analysis technology, carrying out main circuit current signal clocking value sets, and carry out the calibration of personal monitoring's analyzing and diagnosing according to signal record ripple, and solving the time zero problem to the current signal sampling, the isolating switch of having realized being incorporated into the power networks cut-offs the time measurement of closing time point with the pass and determines.
3, arc time and the pre arcing time in on-line monitoring primary cut-out course of action, provide foundation to Fault Diagnosis for HV Circuit Breakers and judgement.
Description of drawings:
Accompanying drawing is structural representation of the present utility model.
In the accompanying drawings, the 1st, monitoring device I, the 2nd, master control borad, the 3rd, prepositive communication computer, the 4th, host computer, the 5th, monitoring device II, the 6th, DSP2812, the 7th, CPLD, the 8th, current measurement A, the 9th, current measurement B, the 10th, current measurement C, the 11st is flow measurement D, the 12nd, isolating switch I, the 13rd, current measurement E, the 14th, current measurement F, the 15th, isolating switch II, the 16th, CAN bus.
Embodiment:
The utility model is described in further detail below in conjunction with accompanying drawing.
as shown in the figure, a kind of primary cut-out cut-offs the on-Line Monitor Device of closing the time with the pass, by monitoring device, master control borad 2, prepositive communication computer 3 and host computer 4 consist of, it is characterized in that: monitoring device divides two parts, be provided with master control borad 2 on monitoring device I, the high-speed data processing unit, DSP2812, logical signal processing unit CPLD7, master control borad 2 output interfaces respectively with host computer, waveform output, network communication interface, house dog is connected, the current measurement of monitoring device, the stroke measurment port is connected with isolating switch respectively, the current measurement of monitoring device II, the stroke measurment port is connected with isolating switch II respectively, monitoring device I, II is connected with host computer with prepositive communication computer by the CAN bus.
Its operation steps is as follows:
(1) to isolating switch minute, closing coil carries out the remote signalling sampling of voltage signal, when isolating switch is received minute, rise during the closing operation instruction, begin to record respectively the displacement moment that remote signals is grown out of nothing, the moment Tf that when being separating brake, voltage signal is set up in switching winding,, moment Th that when closing a floodgate, voltage signal is set up in closing coil, and with Tf, Th as breaker open operation coil, the charged initial time of closing coil:
(2) utilize photoelectric sensor to gather each phase current waveform of major loop, utilize wavelet analysis method to record the main circuit current waveform and have or not constantly.When closing closing operation, main circuit current waveform three-phase grows out of nothing and is designated as Ta1h, Tb1h, Tc1h constantly, with Ta1h, Tb1h, Tc1h as closing each phase major loop pre arcing time initial time in the closing operation process; Cut-off when operation main circuit current waveform from having to without constantly being designated as Ta1f, Tb1f, Tc1f, with Ta1f, Tb1f, Tc1f as cut-offfing in operating process each phase major loop finish time arc time; Last phase current signal is set up constantly as circuit turn-on constantly, and last phase current signal is disappeared to be disconnected constantly as circuit constantly;
(3) displacement transducer is measured connecting lever actuation time, displacement two-end-point when setting the connecting lever regular event according to breaker apparatus explanation and device field condition, and isolating switch is in when closing a floodgate, connecting lever position A point, when isolating switch is in separating brake, connecting lever position B point.When closing closing operation, connecting lever moves to the A point and is designated as Tsah, Tsbh, Tsch constantly, with Tsah, Tsbh, Tsch as isolating switch three-phase contact closure constantly; When cut-offfing operation, connecting lever moves to the B point and is designated as Tsaf, Tsbf, Tscf constantly, and Tsaf, Tsbf, Tscf are disconnected constantly as isolating switch three-phase contact;
(4) calculate the mistiming that the charged initial time Tf of brake division loop of circuit breaker and connecting lever move to B point moment Tsaf, Tsbf, Tscf, be breaker open operation time T 02; Calculate isolating switch and cut-off initial time Tf and main circuit current blackout mistiming constantly, be isolating switch switch off time T0; Calculate isolating switch and close and close loop band electrical initiation Th and main circuit current conducting constantly mistiming of Ta1h, Tb1h, Tc1h constantly, be the isolating switch pass and close time T 1; Calculate isolating switch close close the loop band electrical initiation constantly Th and connecting lever move to mistiming of A point moment Tsah, Tsbh, Tsch, be breaker closing time T 12.
(5) calculating isolating switch switch off time and the mistiming of breaker open operation time are isolating switch arc time T01; Calculating breaker closing time and isolating switch pass closes the mistiming of time and is isolating switch pre arcing time T11; Calculating in the isolating switch interrupting process major loop three-phase current signal mistiming constantly that disappears is isolating switch and cut-offs not the time T tq0 same period; Calculating isolating switch closes and closes in process the major loop three-phase current signal conducting mistiming constantly and be isolating switch and close and close not the time T tq1 same period.
DSP2812 master control borad software is the core that system controls, and the software of CPLD plate depends on the data of DSP2812 master control borad.The program of DSP2812 master control borad can be divided into watchdog routine, communication program, sampling routine and four main functional modules of calculation procedure.Watchdog routine is major cycle, adopts the Task Scheduling Mechanism of imitative embedded real-time multi-task operating system, and to self-check of device.Sampling routine is completed input quantity high-speed sampling, record ripple, the tasks such as generated clock.Seizure and the calculating of all kinds of on-line monitoring indexs when calculation procedure is completed breaker operator.Communication program encapsulates communication data by stipulations, and transmission or receive data.
Claims (1)
1. a primary cut-out cut-offs and the time on-Line Monitor Device is closed in the pass, by monitoring device, master control borad, prepositive communication computer and host computer consist of, it is characterized in that: monitoring device divides two parts, be provided with master control borad on monitoring device I, the high-speed data processing unit, DSP2812, logical signal processing unit CPLD, the master control borad output interface respectively with host computer, waveform output, network communication interface, house dog is connected, the current measurement of monitoring device, the stroke measurment port is connected with isolating switch respectively, the current measurement of monitoring device II, the stroke measurment port is connected with isolating switch II respectively, monitoring device I, II is connected with host computer with prepositive communication computer by the CAN bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220644293 CN202975272U (en) | 2012-11-23 | 2012-11-23 | On-line monitoring device for connecting and disconnecting time of high voltage breaker |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220644293 CN202975272U (en) | 2012-11-23 | 2012-11-23 | On-line monitoring device for connecting and disconnecting time of high voltage breaker |
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| CN202975272U true CN202975272U (en) | 2013-06-05 |
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| CN 201220644293 Expired - Fee Related CN202975272U (en) | 2012-11-23 | 2012-11-23 | On-line monitoring device for connecting and disconnecting time of high voltage breaker |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018664A (en) * | 2012-11-23 | 2013-04-03 | 安徽省电力公司阜阳供电公司 | Equipment for monitoring switching-off and on time of high-voltage circuit breaker on line |
| CN106601534A (en) * | 2016-11-22 | 2017-04-26 | 平高集团有限公司 | High-voltage isolating switch and high-voltage isolating switch transmission mechanism fault monitoring method |
| CN107861058A (en) * | 2017-11-07 | 2018-03-30 | 山东泰开高压开关有限公司 | A kind of measurement apparatus and measuring method of vacuum circuit breaker divide-shut brake speed |
| RU2748784C1 (en) * | 2018-03-28 | 2021-05-31 | Абб Швайц Аг | Device and method for fault diagnosis for circuit breaker |
-
2012
- 2012-11-23 CN CN 201220644293 patent/CN202975272U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018664A (en) * | 2012-11-23 | 2013-04-03 | 安徽省电力公司阜阳供电公司 | Equipment for monitoring switching-off and on time of high-voltage circuit breaker on line |
| CN106601534A (en) * | 2016-11-22 | 2017-04-26 | 平高集团有限公司 | High-voltage isolating switch and high-voltage isolating switch transmission mechanism fault monitoring method |
| CN106601534B (en) * | 2016-11-22 | 2019-01-11 | 平高集团有限公司 | High voltage isolator and high-voltage isolating switch transmission mechanism fault monitoring method |
| CN107861058A (en) * | 2017-11-07 | 2018-03-30 | 山东泰开高压开关有限公司 | A kind of measurement apparatus and measuring method of vacuum circuit breaker divide-shut brake speed |
| RU2748784C1 (en) * | 2018-03-28 | 2021-05-31 | Абб Швайц Аг | Device and method for fault diagnosis for circuit breaker |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130605 Termination date: 20131123 |