CN101907661A - Offline temperature characteristic detection method for SiC (Silicon Carbide) deexcitation resistor - Google Patents
Offline temperature characteristic detection method for SiC (Silicon Carbide) deexcitation resistor Download PDFInfo
- Publication number
- CN101907661A CN101907661A CN2009100624150A CN200910062415A CN101907661A CN 101907661 A CN101907661 A CN 101907661A CN 2009100624150 A CN2009100624150 A CN 2009100624150A CN 200910062415 A CN200910062415 A CN 200910062415A CN 101907661 A CN101907661 A CN 101907661A
- Authority
- CN
- China
- Prior art keywords
- sic
- deexcitation
- excitation resistance
- resistor
- excitation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention discloses an offline temperature characteristic detection method for a SiC (Silicon Carbide) deexcitation resistor, belonging to the detection technology of SiC deexcitation resistors of synchronous generator excitation systems. The offline detection method is characterized by comprising the following steps of: connecting the SiC deexcitation resistor and a testing power supply according to a predetermined time length T; and meanwhile, monitoring the current, the voltage and the surface temperature value of the SiC deexcitation resistor by using an ammeter, a voltmeter and a thermodetector to obtain the temperature characteristic of the SiC deexcitation resistor, wherein the predetermined time length T for switching on the power supply is determined according to 20-50 percent of rated energy of the SiC deexcitation resistor. Aiming at the present circumstance that the complex online deexcitation testing detection method for the generator is adopted for the temperature characteristic of the SiC deexcitation resistor in China, the invention provides a new detection method which is economical and practical as well as safe and simple. Therefore, the SiC deexcitation resistor with defects can be found, the running deexcitation resistor is ensured in the sound condition, and the safety and the reliability of an excitation device and the generator are improved.
Description
Technical field
The present invention relates to synchronous generator excited system, is a kind of SiC de-excitation resistance temperature characterisitic off-line checking method specifically.
Background technology
Synchronous generator excited system demagnetization mode changes de-excitation resistance discharge demagnetization into by traditional switch demagnetization of past, and the security relationship of de-excitation resistance also is related to the safety of generator and electric system to the safety of excitation system.
Volt-ampere characteristic according to de-excitation resistance is divided, and de-excitation resistance is divided into linear resistance and non-linear resistance, and non-linear resistance is divided into zinc paste ZnO resistance and silit SiC resistance again.Because the SiC de-excitation resistance has volt-ampere characteristic " soft ", characteristics such as allowable temperature height, capacity are big are adopted by the high-rating generator excitation system more and more.
Non-linear resistance adopts semiconductor ceramic material to fire, and product quality indicator mainly is its volt-ampere characteristic and temperature characterisitic.For the user, the temperature characterisitic that detects the SiC de-excitation resistance is more actual, because can understand like this by characteristics such as the current-sharing of the series-parallel SiC de-excitation resistance of multi-disc assembly, equal energy, can judge the quality of SiC de-excitation resistance.At present, the volt-ampere characteristic that provides of SiC de-excitation resistance producer and temperature characterisitic all are to adopt large-scale professional equipment measured.If the user need detect this, there are two kinds of test methods at present, first kind is that user oneself carries out the eliminating magnetism of generator test, second kind is that the user entrusts scientific research institution to carry out the test of generator simulation demagnetization.These two kinds of methods all are to belong to the online demagnetization test of SiC de-excitation resistance, check volt-ampere characteristic by admission drop-out voltage and electric current, heat SiC de-excitation resistance assembly and detect its temperature characterisitic with this by the demagnetization energy.
Utilize the temperature test of eliminating magnetism of generator test carrying out SiC de-excitation resistance, from Fig. 1 SiC de-excitation resistance temperature measurement on-line test principle figure, can see, should in magnetism elimination circuit, connect demagnetization reometer and drop-out voltage table before the test.The degaussing switch main contact that closes then, interlock disconnect degaussing switch discharge contact, open three-phase full-controlled rectifier bridge and charge to the generator amature winding.When rechargeable energy reaches requirement, disconnect the degaussing switch main contact this moment, the degaussing switch discharge contact that closes that links, generator amature winding are to the discharge of SiC de-excitation resistance, and discharge energy is by drop-out voltage of being surveyed and electric current decision.After discharge finishes, measure the surface temperature of SiC de-excitation resistance with the infrared measurement of temperature imager at once, calculate the samming coefficient, obtain SiC de-excitation resistance temperature characterisitic according to temperature rise.
These large-scale experiments are very complicated, and wasting time and energy also has certain danger, and seldom the user adopts.That is to say, although the SiC de-excitation resistance extensively adopts in Chinese large-sized power plant, but the user does not mostly carry out any detection to its temperature characterisitic, so that some SiC de-excitation resistance burnout failures have taken place, has influenced the security of operation of excitation unit and generator.For this reason, be necessary this is studied, propose a not only economical and practical but also safe and simple SiC de-excitation resistance temperature characterisitic detection method.
Summary of the invention
Adopt the complicated online demagnetization method for testing and detecting of generator at present SiC de-excitation resistance temperature characterisitic, the utility model proposes a kind of simple offline inspection new method.
Described SiC de-excitation resistance temperature characterisitic off-line checking method, it is characterized in that: with the SiC de-excitation resistance according to scheduled duration T call through test power supply, utilize reometer, voltage table, temperature measurer to monitor the electric current of this SiC de-excitation resistance, voltage, surface temperature value simultaneously, obtain the temperature characterisitic of SiC de-excitation resistance, the scheduled duration T of described energized determines according to 20%～50% of this SiC de-excitation resistance rated energy.
Definite method of described reservation duration T: the call through test power supply, according to voltage, the electric current of measured SiC de-excitation resistance, determine to subscribe duration T according to following formula:
Described experiment power supply is 220 volts of common interchanges or 380 volts of power supplys, perhaps above-mentioned AC power is rectified into corresponding DC experiment power supply.
Described reometer, voltage table adopt common reometer and voltage table.
Described SiC de-excitation resistance is meant the de-excitation resistance assembly of being made up of multi-disc SiC de-excitation resistance.
The beneficial effects of the utility model are, shortcoming such as overcome the complexity that the online demagnetization test method of SiC de-excitation resistance temperature characterisitic is brought, waste time and energy provides a kind of not only economical and practical but also safe and simple detection new method.
Description of drawings
Fig. 1 is SiC de-excitation resistance temperature measurement on-line test principle figure,
Fig. 2 is SiC de-excitation resistance off-line thermometric test principle figure.
Among the figure: 1-three-phase full-controlled rectifier bridge, 2-degaussing switch main contacts, 3-degaussing switch discharge contact, 4-demagnetization reometer, 5-drop-out voltage table, 6-infrared thermometer, 7-SiC de-excitation resistance, 8-rotor winding, the 9-three-phase commutation bridge, 10-power switch, 11-reometer, 12-voltage table.
Embodiment
The present invention is further described below in conjunction with accompanying drawing: as Fig. 2, shown in the SiC de-excitation resistance off-line thermometric test principle figure, experiment power supply switch 10 closes, the time of record loop current and voltage and power turn-on switch 10, after external energy reaches testing requirements, open test power switch 10, and, obtain its temperature characterisitic at once with the surface temperature of infrared thermometer 6 measurement SiC de-excitation resistances 7.
With SiC de-excitation resistance 7 according to scheduled duration T call through test power supply, utilize electric current, voltage, the surface temperature value of reometer 11, voltage table 12, infrared thermometer 6 these SiC de-excitation resistances 7 of monitoring simultaneously, can obtain the temperature characterisitic of SiC de-excitation resistance 7, the scheduled duration T of described energized determines according to 20%～50% of these SiC de-excitation resistance 7 rated energies.
Definite method of described reservation duration T: call through test power supply 10, according to voltage, the electric current of measured SiC de-excitation resistance, determine to subscribe duration T according to following formula:
Described experiment power supply is 220 volts of common interchanges or 380 volts of power supplys, perhaps above-mentioned AC power is rectified into corresponding DC experiment power supply.Because the dirigibility of experiment power supply, and described reometer, voltage table can adopt common reometer and voltage table, and the also greatly convenient detection of de-excitation resistance has reduced the detection cost.
Described SiC de-excitation resistance is meant the de-excitation resistance assembly of being made up of multi-disc SiC de-excitation resistance.A kind of so not only economical and practical but also safe and simple detection new method can be found defective SiC de-excitation resistance timely, guarantees that operating de-excitation resistance is in serviceable condition, improves the safe reliability of excitation unit and generator.
Claims (5)
1. SiC de-excitation resistance temperature characterisitic off-line checking method, it is characterized in that: with the SiC de-excitation resistance according to scheduled duration T call through test power supply, utilize reometer, voltage table, temperature measurer to monitor the electric current of this SiC de-excitation resistance, voltage, surface temperature value simultaneously, obtain the temperature characterisitic of SiC de-excitation resistance, the scheduled duration T of described energized determines according to 20%～50% of this SiC de-excitation resistance rated energy.
2. SiC de-excitation resistance temperature characterisitic off-line checking method according to claim 1, it is characterized in that: definite method of described reservation duration T: call through test power supply, according to voltage, the electric current of measured SiC de-excitation resistance, determine to subscribe duration T according to following formula:
3. SiC de-excitation resistance temperature characterisitic off-line checking method according to claim 1 is characterized in that: described experiment power supply is 220 volts of common interchanges or 380 volts of power supplys, perhaps above-mentioned AC power is rectified into corresponding DC experiment power supply.
4. SiC de-excitation resistance temperature characterisitic off-line checking method according to claim 1 is characterized in that: described reometer, voltage table adopt common reometer and voltage table.
5. SiC de-excitation resistance temperature characterisitic off-line checking method according to claim 1, it is characterized in that: described SiC de-excitation resistance is meant the de-excitation resistance assembly of being made up of multi-disc SiC de-excitation resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100624150A CN101907661A (en) | 2009-06-03 | 2009-06-03 | Offline temperature characteristic detection method for SiC (Silicon Carbide) deexcitation resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100624150A CN101907661A (en) | 2009-06-03 | 2009-06-03 | Offline temperature characteristic detection method for SiC (Silicon Carbide) deexcitation resistor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101907661A true CN101907661A (en) | 2010-12-08 |
Family
ID=43263177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100624150A Pending CN101907661A (en) | 2009-06-03 | 2009-06-03 | Offline temperature characteristic detection method for SiC (Silicon Carbide) deexcitation resistor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101907661A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102998570A (en) * | 2012-12-11 | 2013-03-27 | 辽宁蒲石河抽水蓄能有限公司 | Device and method for testing temperature rising characteristics of nonlinear resistors of generator de-excitation systems |
| CN103616593A (en) * | 2013-11-28 | 2014-03-05 | 国家电网公司 | Energy capacity calculation method after parallel connection of multiple single-component SiC field suppression resistors |
| CN105093034A (en) * | 2015-09-01 | 2015-11-25 | 中国长江电力股份有限公司 | De-excitation time-based circuit and method for detecting performance of silicon carbide de-excitation resistor |
| CN107941364A (en) * | 2017-12-15 | 2018-04-20 | 中国长江电力股份有限公司 | A kind of generator excitation equipment temperature measuring equipment and method based on the more temperature transducers of infrared, fluorescence optical fiber |
| CN110514936A (en) * | 2019-09-17 | 2019-11-29 | 中国长江电力股份有限公司 | A kind of de-excitation resistance on-line monitoring and diagnostic method and system |
-
2009
- 2009-06-03 CN CN2009100624150A patent/CN101907661A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102998570A (en) * | 2012-12-11 | 2013-03-27 | 辽宁蒲石河抽水蓄能有限公司 | Device and method for testing temperature rising characteristics of nonlinear resistors of generator de-excitation systems |
| CN102998570B (en) * | 2012-12-11 | 2015-09-23 | 国家电网公司 | Eliminating magnetism of generator mission nonlinear resistance testing temperature rising characteristic device and method |
| CN103616593A (en) * | 2013-11-28 | 2014-03-05 | 国家电网公司 | Energy capacity calculation method after parallel connection of multiple single-component SiC field suppression resistors |
| CN103616593B (en) * | 2013-11-28 | 2015-12-02 | 国家电网公司 | Can capacity calculation methods after a kind of multiple unimodule SiC de-excitation resistance parallel connection |
| CN105093034A (en) * | 2015-09-01 | 2015-11-25 | 中国长江电力股份有限公司 | De-excitation time-based circuit and method for detecting performance of silicon carbide de-excitation resistor |
| CN107941364A (en) * | 2017-12-15 | 2018-04-20 | 中国长江电力股份有限公司 | A kind of generator excitation equipment temperature measuring equipment and method based on the more temperature transducers of infrared, fluorescence optical fiber |
| CN110514936A (en) * | 2019-09-17 | 2019-11-29 | 中国长江电力股份有限公司 | A kind of de-excitation resistance on-line monitoring and diagnostic method and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105807230B (en) | Remaining battery capacity and health status rapid detection method and device | |
| CN102981120B (en) | Full-performance detecting system of magnetic latching relay and detecting method thereof | |
| CN104677927B (en) | Distribution transformer winding wood properly test system and method | |
| CN101907661A (en) | Offline temperature characteristic detection method for SiC (Silicon Carbide) deexcitation resistor | |
| WO2011147222A1 (en) | Control method and system of intelligent detection, restoration for lead-acid battery group | |
| CN101769994A (en) | 50 percent discharge capacity test method for valve-controlled type sealed lead acid storage battery | |
| CN201141894Y (en) | Micro-resistance measurement system of high-voltage switch assembly | |
| KR101529975B1 (en) | The power supply test system for distribution automation system | |
| CN109870650A (en) | Battery cell monitoring method and system | |
| CN103176142A (en) | Grid-connection adaptability testing system and method for photovoltaic power stations | |
| CN108267695A (en) | A kind of analysis test method based on pressure lithium battery interior short circuit | |
| CN101592710A (en) | Action voltage test method for direct-current switch coil | |
| CN106054071A (en) | Relay calibration instrument | |
| TWI579575B (en) | Battery health detection method and its circuit | |
| CN207163590U (en) | Winding temperature rise detection means and equipment | |
| CN202562733U (en) | High voltage breaker mechanical property on-line live-line detection system | |
| CN203012095U (en) | Overall performance detecting system for magnetic latching relay | |
| CN209169935U (en) | A kind of power-off protection apparatus of gas chromatograph | |
| CN204514832U (en) | Substation transformer winding wood properly test system | |
| CN202661606U (en) | On-line performance monitoring system for storage batteries | |
| CN106057702A (en) | Detection method for solar battery piece with qualified hot spot temperature range | |
| CN103542437A (en) | Idle load prevention microwave oven and idle load detection method thereof | |
| CN217443499U (en) | Relay operating characteristic measuring device | |
| CN201449441U (en) | Integrated tester for action voltage of DC switch coil | |
| CN203688678U (en) | De-excitation resistor testing system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20101208 |