CN103616573A - Reverse recovery charge measurement system and measurement method for silicon controlled rectifier - Google Patents
Reverse recovery charge measurement system and measurement method for silicon controlled rectifier Download PDFInfo
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- CN103616573A CN103616573A CN201310683232.7A CN201310683232A CN103616573A CN 103616573 A CN103616573 A CN 103616573A CN 201310683232 A CN201310683232 A CN 201310683232A CN 103616573 A CN103616573 A CN 103616573A
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- thyristor
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- reverse recovery
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Abstract
The invention relates to a reverse recovery charge measurement system and a reverse recovery charging measurement method for a silicon controlled rectifier. The system is connected with a measured converter valve through a lead and comprises current transmitter units, a current sensor, an optical fiber transmission system, a data acquisition system and an upper computer, which are sequentially connected. The measurement method comprises the steps of inputting a silicon controlled rectifier measurement point in a valve to the current sensor through the lead, measuring current flowing through the silicon controlled rectifier in the valve by utilizing the current sensor, converting a detected current signal analogue value into a digital signal through a photoelectric conversion system by utilizing the current sensor, converting the digital signal into an optical signal by utilizing the optical fiber transmission system, converting the optical signal into a digital signal at the input end of the upper computer by utilizing the data acquisition system, reading a current value at each measurement point in real time by using a controller, running a background analysis unit by using the upper computer, and performing calculation by using the background analysis unit to generate reverse recovery charge data from reverse recovery current data to realize the real-time measurement of the reverse recovery charge of the silicon controlled rectifier.
Description
Technical field
The present invention relates to system and the method thereof of field of power electronics, be specifically related to a kind of thyristor QRR measuring system and measuring method thereof.
Background technology
Thyristor is the power electronic devices that is widely used in DC converter valve, it is easy to advantage that series connection used and high reliability, advantage cheaply, make it to become HVDC Transmission Technology field range of application device for high-power power electronic the most widely, the characteristic of thyristor has directly affected the safety and reliability of DC transmission system.QRR is one of thyristor key property, it is the important parameter that affects valve design, the reverse recovery characteristic of thyristor is not quite identical, easily cause and turn-off interior each thyristor both end voltage difference of valve constantly, cause the phenomenons such as single thyristor punctures, so thyristor QRR is measured, preferably the consistent thyristor of reverse recovery characteristic is connected most important.
Measurement for thyristor reverse recovery characteristic, classic method is that single thyristor is placed in to surveying instrument, the metering circuit corresponding to measurement of different qualities parameter, apply different voltage, current stress, utilize measurement data to draw family curve, the shortcoming of this kind of method is thyristor must be taken out and carries out independent measurement from circuit.
For in electric system with in valve or testing equipment with valve, put into operation for a long time, and stand different operating modes, especially test valve, its service condition compares to nominal situation and also wants severe, and the characterisitic parameter ratio of thyristor is easier to change, if utilizing classic method measures thyristor characteristics, thyristor must be taken out from valve, and be not easy to reappear same electric current and voltage stress, be unfavorable for case study.
Summary of the invention
For the deficiencies in the prior art, the object of this invention is to provide a kind of thyristor QRR measuring system, another object is to provide a kind of measuring method of thyristor QRR measuring system, the present invention measures thyristor QRR in operational process, is conducive to the real-time monitoring to thyristor characteristics.
The object of the invention is to adopt following technical proposals to realize:
The invention provides a kind of thyristor QRR measuring system, described system is connected with tested converter valve by lead-in wire, its improvements are, described system comprises current transducer unit, current sensor, fibre-optic transmission system (FOTS), data acquisition system (DAS) and the host computer connecting successively;
Described system is for the real-time measurement to thyristor QRR.
Further, at least two of described current transducer unit, described current transducer unit comprises capacitance-resistance branch road in parallel and current transducer-thyristor branch road; Electric capacity and resistance that the capacitance-resistance of described parallel connection is propped up route series connection form; Current transducer and thyristor that described current transducer-thyristor props up route series connection form.
Further, described current sensor is for measuring the current signal that converter valve thyristor flows through, and by current signal transfer to photo transmission system, described photo transmission system comprises AD converter and the optic fiber converter connecting successively, described AD converter is converted to digital signal by the analog quantity of current signal, described optic fiber converter is converted to light signal by digital signal, and is sent to digital collection system.
Further, described digital collection system is arranged on the inlet end of host computer, by optical fiber, is connected with host computer; Described digital collection system is converted to digital signal by light signal and is sent to host computer; The controller of described host computer reads the reverse recovery current value of each measuring point in real time, and moves the backstage analytic unit in host computer, and reverse recovery current value is generated to QRR data, realizes the real-time measurement to thyristor QRR.
The present invention is based on the measuring method of a kind of thyristor QRR measuring system that another object provides, its improvements are, described method comprises the steps:
(1) thyristor measuring point in converter valve is inputed to current sensor by lead-in wire;
(2) current sensor is for measuring the current signal that converter valve thyristor flows through, and by current signal transfer to photo transmission system;
(3) AD converter in photo transmission system is converted to digital signal by the analog quantity of current signal, and by digital data transmission to optic fiber converter, optic fiber converter is converted to light signal by digital signal, and is sent to digital collection system;
(4) digital collection system is converted to digital signal by light signal and is sent to host computer;
(5) controller of host computer reads the reverse recovery current value of each measuring point in real time, and moves the backstage analytic unit in host computer;
(6) backstage analytic unit generates QRR data by reverse recovery current value, realizes the real-time measurement to thyristor QRR.
Compared with the prior art, the beneficial effect that the present invention reaches is:
1, content of the present invention can Real-Time Monitoring engineering be used DC converter valve and DC converter valve voltage distribution under running status for test, be conducive to detect in time the thyristor of performance degradation, to reducing system failure rate and prolongation test unit life-span, there is important effect.
2, the present invention measures thyristor QRR in operational process, is conducive to the real-time monitoring to thyristor characteristics.It is less that reverse recovery current value compares to test current, and its duration is shorter, therefore current sensor requires the corresponding time short, survey frequency is high.Thyristor QRR measuring system has multi pass acquisition point, can measure in real time thyristor QRR, and can carry out real-time waveform demonstration and Data Management Analysis.
Accompanying drawing explanation
Fig. 1 is the structural representation of thyristor QRR measuring system provided by the invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Thyristor QRR measuring system provided by the invention, its structural drawing as shown in Figure 1, this system is connected with tested converter valve by lead-in wire, and this system comprises current transducer unit, current sensor, fibre-optic transmission system (FOTS), data acquisition system (DAS) and the host computer connecting successively.
At least two of current transducer unit, described current transducer unit comprises capacitance-resistance branch road in parallel and current transducer-thyristor branch road; Electric capacity and resistance that the capacitance-resistance of described parallel connection is propped up route series connection form; Current transducer and thyristor that described current transducer-thyristor props up route series connection form.
Current sensor is for measuring the current signal that converter valve thyristor flows through, and by current signal transfer to photo transmission system, described photo transmission system comprises AD converter and the optic fiber converter connecting successively, described AD converter is converted to digital signal by the analog quantity of current signal, described optic fiber converter is converted to light signal by digital signal, and is sent to digital collection system.
Digital collection system is arranged on the inlet end of host computer, and described digital collection system is converted to digital signal by light signal and is sent to host computer; The controller of described host computer reads the reverse recovery current value of each measuring point in real time, and moves the backstage analytic unit in host computer, and reverse recovery current value is generated to QRR data, realizes the real-time measurement to thyristor QRR.
The measuring method of a kind of thyristor QRR measuring system that the present invention also provides, comprises the steps:
(1) thyristor measuring point in converter valve is inputed to current sensor by lead-in wire;
(2) current sensor is for measuring the current signal that converter valve thyristor flows through, and by current signal transfer to photo transmission system;
(3) AD converter in photo transmission system is converted to digital signal by the analog quantity of current signal, and by digital data transmission to optic fiber converter, optic fiber converter is converted to light signal by digital signal, and is sent to digital collection system;
(4) digital collection system is converted to digital signal by light signal and is sent to host computer;
(5) controller of host computer reads the reverse recovery current value of each measuring point in real time, and moves the backstage analytic unit in host computer;
(6) backstage analytic unit generates QRR data by reverse recovery current value, realizes the real-time measurement to thyristor QRR.
It is less that reverse recovery current value compares to test current, and its duration is shorter, therefore current sensor requires the corresponding time short, survey frequency is high.Thyristor QRR measuring system has multi pass acquisition point, can measure in real time thyristor QRR, and can carry out real-time waveform demonstration and Data Management Analysis.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although the present invention is had been described in detail with reference to above-described embodiment, those of ordinary skill in the field are to be understood that: still can modify or be equal to replacement the specific embodiment of the present invention, and do not depart from any modification of spirit and scope of the invention or be equal to replacement, it all should be encompassed in the middle of claim scope of the present invention.
Claims (5)
1. a thyristor QRR measuring system, described system is connected with tested converter valve by lead-in wire, it is characterized in that, described system comprises current transducer unit, current sensor, fibre-optic transmission system (FOTS), data acquisition system (DAS) and the host computer connecting successively;
Described system is for the real-time measurement to thyristor QRR.
2. thyristor QRR measuring system as claimed in claim 1, is characterized in that, at least two of described current transducer unit, and described current transducer unit comprises capacitance-resistance branch road in parallel and current transducer-thyristor branch road; Electric capacity and resistance that the capacitance-resistance of described parallel connection is propped up route series connection form; Current transducer and thyristor that described current transducer-thyristor props up route series connection form.
3. thyristor QRR measuring system as claimed in claim 1, it is characterized in that, described current sensor is for measuring the current signal that converter valve thyristor flows through, and by current signal transfer to photo transmission system, described photo transmission system comprises AD converter and the optic fiber converter connecting successively, described AD converter is converted to digital signal by the analog quantity of current signal, and described optic fiber converter is converted to light signal by digital signal, and is sent to digital collection system.
4. thyristor QRR measuring system as claimed in claim 1, is characterized in that, described digital collection system is arranged on the inlet end of host computer, by optical fiber, is connected with host computer; Described digital collection system is converted to digital signal by light signal and is sent to host computer; The controller of described host computer reads the reverse recovery current value of each measuring point in real time, and moves the backstage analytic unit in host computer, and reverse recovery current value is generated to QRR data, realizes the real-time measurement to thyristor QRR.
5. a measuring method for thyristor QRR measuring system, is characterized in that, described method comprises the steps:
(1) thyristor measuring point in converter valve is inputed to current sensor by lead-in wire;
(2) current sensor is for measuring the current signal that converter valve thyristor flows through, and by current signal transfer to photo transmission system;
(3) AD converter in photo transmission system is converted to digital signal by the analog quantity of current signal, and by digital data transmission to optic fiber converter, optic fiber converter is converted to light signal by digital signal, and is sent to digital collection system;
(4) digital collection system is converted to digital signal by light signal and is sent to host computer;
(5) controller of host computer reads the reverse recovery current value of each measuring point in real time, and moves the backstage analytic unit in host computer;
(6) backstage analytic unit generates QRR data by reverse recovery current value, realizes the real-time measurement to thyristor QRR.
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| CN201310683232.7A CN103616573B (en) | 2013-12-12 | 2013-12-12 | A kind of IGCT QRR measures system and measuring method thereof |
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| CN201310683232.7A CN103616573B (en) | 2013-12-12 | 2013-12-12 | A kind of IGCT QRR measures system and measuring method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104967287A (en) * | 2015-06-30 | 2015-10-07 | 许继电气股份有限公司 | Method of automatically sending reverse recovery protection trigger state signal of converter valve |
| CN109239587A (en) * | 2017-07-10 | 2019-01-18 | 南京南瑞继保电气有限公司 | A kind of thyristor valve test macro based on transparent forwarding |
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| EP0170882A1 (en) * | 1984-07-17 | 1986-02-12 | Siemens Aktiengesellschaft | Circuit arrangement for monitoring a thyristor |
| JPS6280567A (en) * | 1985-10-03 | 1987-04-14 | Kawasaki Steel Corp | Deterioration diagnosing method for power converting element |
| CN201075123Y (en) * | 2007-09-10 | 2008-06-18 | 中国电力科学研究院 | Device for measuring high potential current |
| CN201886058U (en) * | 2010-06-25 | 2011-06-29 | 中国电力科学研究院 | Photoelectric measurement device for high-voltage direct current (DC) transmission converter valve |
| CN102709886A (en) * | 2012-06-08 | 2012-10-03 | 湖北三环发展股份有限公司 | Status monitoring and overvoltage protection system of high-voltage TCR (Thyristor Controlled Reactor) thyristor valve gate set |
| CN102998620A (en) * | 2012-12-17 | 2013-03-27 | 哈尔滨工业大学 | Device and method for quick online fault detection of high voltage thyristor valve block |
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2013
- 2013-12-12 CN CN201310683232.7A patent/CN103616573B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0170882A1 (en) * | 1984-07-17 | 1986-02-12 | Siemens Aktiengesellschaft | Circuit arrangement for monitoring a thyristor |
| JPS6280567A (en) * | 1985-10-03 | 1987-04-14 | Kawasaki Steel Corp | Deterioration diagnosing method for power converting element |
| CN201075123Y (en) * | 2007-09-10 | 2008-06-18 | 中国电力科学研究院 | Device for measuring high potential current |
| CN201886058U (en) * | 2010-06-25 | 2011-06-29 | 中国电力科学研究院 | Photoelectric measurement device for high-voltage direct current (DC) transmission converter valve |
| CN102709886A (en) * | 2012-06-08 | 2012-10-03 | 湖北三环发展股份有限公司 | Status monitoring and overvoltage protection system of high-voltage TCR (Thyristor Controlled Reactor) thyristor valve gate set |
| CN102998620A (en) * | 2012-12-17 | 2013-03-27 | 哈尔滨工业大学 | Device and method for quick online fault detection of high voltage thyristor valve block |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104967287A (en) * | 2015-06-30 | 2015-10-07 | 许继电气股份有限公司 | Method of automatically sending reverse recovery protection trigger state signal of converter valve |
| CN104967287B (en) * | 2015-06-30 | 2018-01-23 | 许继电气股份有限公司 | A kind of converter valve Reverse recovery protects triggering state signal upper delivery method automatically |
| CN109239587A (en) * | 2017-07-10 | 2019-01-18 | 南京南瑞继保电气有限公司 | A kind of thyristor valve test macro based on transparent forwarding |
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| CN103616573B (en) | 2016-08-17 |
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