CN115808199A - Transformer comprehensive performance test system - Google Patents
Transformer comprehensive performance test system Download PDFInfo
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- CN115808199A CN115808199A CN202211410809.2A CN202211410809A CN115808199A CN 115808199 A CN115808199 A CN 115808199A CN 202211410809 A CN202211410809 A CN 202211410809A CN 115808199 A CN115808199 A CN 115808199A
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Abstract
The invention relates to the technical field of transformer testing, in particular to a comprehensive performance testing system of a transformer, which comprises an experimental operating platform, an experimental control system and an experimental measuring unit, wherein the experimental measuring unit comprises a transformation ratio tester, a power analyzer, a temperature patrol tester, an infrared thermal imager, a partial discharge detector, a dielectric loss tester, a transformer on-load tap changer tester, a sound level meter, a lightning impulse generator, a transformer oil analyzer, an insulating oil dielectric strength tester, a full-automatic insulating oil dielectric loss and volume resistivity tester, an oil trace moisture tester and a winding denaturation tester. The invention greatly improves the efficiency of transformer test and has high automation degree.
Description
Technical Field
The invention relates to the technical field of transformer testing, in particular to a comprehensive performance testing system of a transformer.
Background
Before the transformer is produced, various testing experiments need to be carried out on the transformer, so that the performance and the working stability of the transformer are detected.
At present, field test equipment lacks, needs to build a plurality of test platforms, lacks unified allotment, leads to test work inefficiency, and the automation level is low, influences the production efficiency of transformer, still has test equipment imperfect simultaneously, leads to the transformer can't carry out comprehensive test, in addition, still has the test equipment of building temporarily, lacks corresponding safeguard measure, and whole test process complex operation is complicated.
Disclosure of Invention
The invention provides a transformer comprehensive performance testing system which greatly improves the efficiency of transformer testing and has high automation degree.
In order to realize the purpose of the invention, the adopted technical scheme is as follows: transformer comprehensive properties test system, its characterized in that: the device comprises an experiment operating platform, an experiment control system and an experiment measuring unit;
the test control system comprises an industrial personal computer and a PLC (programmable logic controller), wherein the industrial personal computer is used for organizing a test flow and issuing an action command, the industrial personal computer and the PLC are in wireless transmission communication, and the PLC is mainly used for setting a logic relationship, integrating and executing a bottom layer action command and realizing a protection function; the test measuring unit comprises a transformation ratio tester, a power analyzer, a temperature inspection tester, an infrared thermal imager, a partial discharge detector, a dielectric loss tester, a transformer on-load tap changer tester, a sound level meter, a lightning impulse generator, a transformer oil analyzer, an insulating oil dielectric strength tester, a full-automatic insulating oil dielectric loss and volume resistivity tester, an oil trace moisture tester and a winding denaturation tester,
transformation ratio tester: measuring the voltage ratio of the transformer and verifying the connection label;
a power analyzer: no-load loss and no-load current measurement, load loss measurement and short-circuit impedance measurement of the transformer;
temperature polling appearance and infrared thermal imager: the temperature rise experiment device is used for temperature rise experiments of the transformer;
a partial discharge detector: testing partial discharge of the transformer;
dielectric loss tester: the device is used for measuring the dielectric loss factor of the transformer and the capacitance between windings;
the transformer on-load tap-changer tester comprises: the method is used for testing the on-load tap-changer of the transformer;
a sound level meter: the noise measurement test is used for the transformer;
lightning impulse generator: the method is used for lightning impulse test of the transformer;
transformer oil analyzer: the method is used for transformer oil chromatographic analysis;
insulating oil dielectric strength tester: the method is used for testing the dielectric strength of the transformer insulating oil;
full-automatic insulating oil dielectric loss and volume resistivity tester: the method is used for testing the dielectric loss of the transformer oil;
oil trace moisture tester: the method is used for testing trace moisture of the transformer oil;
the winding denaturation tester comprises: the method is used for the deformation test of the three-phase winding of the transformer.
As an optimization scheme of the invention, the comprehensive performance test system of the transformer also comprises a compensation capacitor device, and the compensation capacitor device is used for compensating reactive components during load and temperature rise tests of the transformer.
As an optimization scheme of the invention, the transformer comprehensive performance test system is provided with four-stage protection, including input stage protection, output stage protection, measurement stage protection and test article stage protection, so that the transformer comprehensive performance test system can timely warn and quickly make a protection action when a tested article or test equipment has a fault in the test process, and can give a corresponding prompt after the protection action so as to determine the fault reason.
As the optimization scheme of the invention, the input stage protection comprises the steps of arranging overcurrent relay protection at the input end; the output stage protection comprises the steps that current relay protection is arranged at the output end, and the measurement stage protection is that in the measurement process, after the voltage or current value of each tester exceeds the measuring range, a warning is sent out and the operation is stopped; the sample level protection is to set over-voltage and over-current protection according to the rated voltage and current value of the input end of the tested transformer.
The invention has the positive effects that: 1) The full-automatic testing device realizes full-automatic testing of various functions of the transformer, has high automation degree, adopts the PLC as a control core in a full-automatic mode, takes a computer as a human-computer interaction interface, and has the outstanding advantages of high reliability, intuitive interface, simple and convenient operation, perfect protection measures and the like;
2) The system comprehensively tests the transformer in all directions without temporary assembly, thereby improving the testing efficiency of the transformer and the delivery safety of the transformer;
3) The invention has perfect protection measures, is suitable for the severe environment of transformer test, and improves the safety of the transformer test.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a block diagram of the overall structure of the present invention.
Detailed Description
As shown in FIG. 1, the invention discloses a comprehensive performance testing system of a transformer, which is characterized in that: the device comprises an experiment operating platform, an experiment control system and an experiment measuring unit;
the test control system comprises an industrial personal computer and a PLC (programmable logic controller), wherein the industrial personal computer is used for organizing a test flow and issuing an action command, the industrial personal computer and the PLC are in wireless transmission communication, and the PLC is mainly used for setting a logic relationship, integrating and executing a bottom layer action command and realizing a protection function; the test measuring unit comprises a transformation ratio tester, a power analyzer, a temperature inspection tester, an infrared thermal imager, a partial discharge detector, a dielectric loss tester, a transformer on-load tap changer tester, a sound level meter, a lightning impulse generator, a transformer oil analyzer, an insulating oil dielectric strength tester, a full-automatic insulating oil dielectric loss and volume resistivity tester, an oil trace moisture tester and a winding denaturation tester,
transformation ratio tester: and measuring the voltage ratio of the transformer and verifying a connection label (GD-700A), wherein the GD-700A can check the correctness of the turn ratio of the transformer, the condition of a tap switch, whether the transformer is in turn-to-turn short circuit or not and whether the transformer can run in parallel or not, the three-phase transformation ratio or turn ratio test is completed at one time, and the minimum resolution is 0.0001.
A power analyzer: the method comprises the following steps of measuring no-load loss and no-load current of the transformer, measuring load loss and short-circuit impedance (a river WT 3000), and measuring a true effective value (phase and line) of Urms, a root mean square value (phase and line) of Urmc, a true effective value of Irms, active power P, harmonic wave, reactive power Q, a lambda power factor, f frequency and the like through the river WT 3000;
temperature polling instrument: the temperature polling instrument is used for temperature rise experiments of the transformer; 20 measurement channels with a basic error of +/-0.01% F.S; the number display range is 0-1999.99; 4 groups of lifting brackets and testing oil cups are matched; thermal resistance: pt100, cu50, pt1000; thermocouple: omega type K thermocouples. And an infrared thermal imager is Tis55.
A partial discharge detector: testing partial discharge of the transformer;
dielectric loss tester: the device is used for measuring the dielectric loss factor of the transformer and the capacitance between windings; GD-6000, GD6000 can be full automatic measure various high voltage power equipment dielectric loss tangent value and electric capacity precision instrument. The accurate measurement under the interference of strong electric field can be ensured. The device has the functions of data tracking, automatic measurement, liquid crystal display, data printing and the like. Once operation, the microcomputer automatically completes the whole process.
The transformer on-load tap-changer tester comprises: GD-810, GD-810 are used for on-load tap-changer testing of the transformer; the requirements of checking the action sequence of the on-load tap-changer, measuring the switching time and the like are required. The method can realize accurate measurement of parameters such as transition time, transition waveform, transition resistance, three-phase synchronism and the like of the on-load tap-changer.
A sound level meter: noise measurement test for transformer, sound level meter AWA5661, measurement range: 25dB (A) to 140dB (A);
lightning impulse generator: the lightning impulse test method is used for the lightning impulse test of the transformer; the lightning impulse generator consists of an oscilloscope, a voltage divider for sampling, a test transformer, a capacitor, a wave head resistor, a wave tail resistor, a spherical gap and a wave interception device; nominal voltage: 400KV, nominal energy: 20KJ. Automatic adjustment ball gap, automatic charging, standardized waveform editing.
Transformer oil analyzer: namely a chromatograph used for transformer oil chromatographic analysis; the model is GD-9860, which mainly comprises: the system comprises a chromatographic workstation, a chromatographic analyzer host, an air generator, an oscillator, a hydrogen generator, nitrogen, a computer host, a display screen, a printer, a 4L standard gas cylinder, a pressure reducing valve and the like. The GD-9860 gas chromatograph adopts a double-column parallel shunt system, is provided with three detectors of TCD and double FID and a nickel catalyst catalytic converter, and can realize one-time sample introduction for seven gas components dissolved in oil: when all H2, CH4, C2H2, C2H4, C2H6, CO and CO2 are measured, and the minimum detection concentration can satisfy the requirement that when the sample volume is 1mL, the volume of gas contained in the unit volume oil is in a pair of: h2 is less than or equal to 2ppm, C2H2 is less than or equal to 0.1ppm, and CO2 are less than or equal to 2ppm.
Insulating oil dielectric strength tester: the method is used for testing the dielectric strength of the transformer insulating oil; the model is as follows: ZIJJ-III. Maximum output voltage: 80kV, voltage measurement accuracy: plus or minus 1 percent; breakdown voltage display resolution: 0.01kV; pressure rise speed: (2000 + -200) V/s or (3000 + -300) V/s.
The full-automatic insulating oil dielectric loss and volume resistivity tester: the method is used for testing the dielectric loss of the transformer oil; GD-6100, capacitance: 5pF to 200pF, dielectric loss factor: 0.00001 to 100, direct current resistivity: 2.5M omega M to 20T omega M.
Oil trace moisture tester: the method is used for testing trace moisture of the transformer oil; GD6400, adopt classical theory-Carl.Fei Hu microcoulomb coulometry, the measuring range: 0 ug-100 mg; precision: the error of the tested water amount between 3ug and 1000ug is less than +/-3 ug; the water amount is more than 1000ug, and the error is less than +/-0.3%.
The winding denaturation tester comprises: the method is used for the deformation test of the three-phase winding of the transformer.
The experiment operating table is of a plane structure, has a wide visual field, and is simple and generous. The industrial computer hangs large-size screen curved surface display, and wireless mouse keyboard operation, stability can be good, shows clearly, and convenient operation is swift. The PLC is mainly used for setting a logic relation, integrating and executing bottom layer action commands and realizing a protection function, has the advantages of flexible programming, high reliability, high action execution speed and the like, and the industrial personal computer is used for organizing a test flow, issuing action commands and the like, is communicated with the PLC through RS-485, is completely isolated from the PLC, can effectively prevent communication signals from being interfered and ensures the safety of the computer when a test article fault discharges to the ground;
after each test is finished, the test data and the calculation result of the test are stored into a test database according to the number, the test data can be inquired according to the number and a test report can be generated according to a user-specified format through independent test data inquiry and report generation software, the test report can be stored as an office excel table and can be converted into PDF, word and other formats, and the test report can be directly printed and output by a desktop printer; the test report format may be generated according to customer requirements.
Taking the temperature rise test as an example:
the test is divided into two stages:
the first stage is as follows: applying total loss (total loss of the tested transformer), observing temperature change for three continuous hours, and determining that the tested transformer reaches a stable state if the temperature change rate does not exceed 1K in each hour, so that the second stage can be entered;
and a second stage: applying rated current, reducing the current value applied by the tested transformer to the rated current value of the high-voltage side of the tested transformer, maintaining for one hour, recording the current data of voltage, current, loss, temperature and the like, directly powering off the system after one hour, rapidly measuring the resistance values of the high-voltage side and the low-voltage side of the tested transformer, generally only adopting one different resistor, recording the resistance value every half minute or one minute, measuring for fifteen minutes, stopping measurement, calculating the high-voltage thermal resistance value and the low-voltage thermal resistance value of the tested transformer according to the recorded resistance values, and finally calculating all data to obtain the final temperature rise value as the final data required by the test.
The transformer comprehensive performance test system also comprises a compensation capacitor device, wherein the compensation capacitor device is used for compensating reactive components during load and temperature rise tests of the transformer, and the transformer test power supply adopts a 1250kVA intermediate transformer for voltage regulation, so that the load tests and the temperature rise tests of an 80MVA/132KV transformer cannot be met, and the reactive compensation device needs to be added for reactive compensation to compensate the capacities of the voltage regulator and the intermediate transformer. The power factor can be improved by adopting a mode of reactive compensation of the capacitor, and the investment cost can be reduced.
The transformer comprehensive performance test system is provided with four-level protection, including input-level protection, output-level protection, measurement-level protection and test-level protection, can timely warn and rapidly make a protection action when a tested object or test equipment fails in the test process, and can give a corresponding prompt after the protection action so as to determine the failure reason.
Input stage protection:
setting an overcurrent relay protection at an input end according to the input rated current of a voltage regulator to ensure that the input end is not overcurrent and can be used as a backup protection of output stage protection; a motor protector is arranged on the starting side of a generator set dragging motor and is set according to the rated current of the motor so as to ensure the safe starting of the generator set.
Protection of an output stage:
setting overcurrent relay protection at the output end, and respectively setting according to the rated current output by the voltage regulator and the generator set so as to ensure that the output end of the voltage regulator is not overcurrent; measuring voltage and current signals at an output end, converting the voltage and current signals into RS/485 signals through a digital quantity sensor, entering a PLC (programmable logic controller), and then carrying out protection setting in the PLC according to rated voltage and current values of the voltage regulator and the output end of a generator set, wherein the protection is used as a backup protection of an overcurrent relay;
protection in a measurement level:
the protection aiming at the measuring equipment is arranged, in the test process, if the measured voltage or current value exceeds the voltage and current range of the precision measuring mutual inductor or the power analyzer, the system firstly gives out a warning and stops the boosting operation within a certain safety margin, and if the voltage and current measured value exceeds the safety margin, the system immediately executes the emergency stop operation, cuts off all loop control components and gives a prompt.
Zero-rise voltage protection
In order to ensure that the system can carry out zero-lifting voltage power supply, the system automatically returns the voltage regulator to the zero position (low limit) after the output power supply is disconnected in each test, and before power supply, if the voltage regulator is not in the zero position, the voltage regulator is firstly lowered to the zero position, then power supply operation is executed, and if the voltage regulator cannot reach the zero position, the system prompts that the power supply operation cannot be executed.
Test article level protection
The overvoltage protection and the overcurrent protection are set according to the test setting of the rated voltage value and the current value of the input end of the tested transformer, corresponding prompts are given after the protection action occurs, the protection belongs to the protection set in a computer program, and the protection can be used as an effective means for protecting the tested transformer when the fault occurs in the test of the miniature transformer and the protection setting value does not reach the upper protection setting value.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. Transformer comprehensive properties test system, its characterized in that: the device comprises an experiment operating platform, an experiment control system and an experiment measuring unit;
the test control system comprises an industrial personal computer and a PLC (programmable logic controller), wherein the industrial personal computer is used for organizing a test flow and issuing an action command, the industrial personal computer and the PLC are in wireless transmission communication, and the PLC is mainly used for setting a logic relationship, integrating and executing a bottom layer action command and realizing a protection function; the test measuring unit comprises a transformation ratio tester, a power analyzer, a temperature inspection tester, an infrared thermal imager, a partial discharge detector, a dielectric loss tester, a transformer on-load tap changer tester, a sound level meter, a lightning impulse generator, a transformer oil analyzer, an insulating oil dielectric strength tester, a full-automatic insulating oil dielectric loss and volume resistivity tester, an oil trace moisture tester and a winding denaturation tester,
transformation ratio tester: measuring the voltage ratio of the transformer and verifying the connection label;
a power analyzer: no-load loss and no-load current measurement, load loss measurement and short-circuit impedance measurement of the transformer;
temperature patrol instrument and infrared thermal imager: the temperature rise experiment device is used for temperature rise experiments of the transformer;
a partial discharge detector: testing partial discharge of the transformer;
dielectric loss tester: the device is used for measuring the dielectric loss factor of the transformer and the capacitance between windings;
the transformer on-load tap-changer tester: the method is used for testing the on-load tap-changer of the transformer;
a sound level meter: the noise measurement test is used for the transformer;
lightning impulse generator: the method is used for lightning impulse test of the transformer;
transformer oil analyzer: the method is used for transformer oil chromatographic analysis;
insulating oil dielectric strength tester: the method is used for testing the dielectric strength of the transformer insulating oil;
the full-automatic insulating oil dielectric loss and volume resistivity tester: the method is used for testing the dielectric loss of the transformer oil;
oil trace moisture tester: the method is used for testing trace moisture of the transformer oil;
the winding denaturation tester: the method is used for deformation testing of the three-phase winding of the transformer.
2. The transformer comprehensive performance testing system of claim 1, characterized in that: the transformer comprehensive performance testing system further comprises a compensation capacitor device, and the compensation capacitor device is used for compensating reactive components during load and temperature rise tests of the transformer.
3. The transformer comprehensive performance test system of claim 2, characterized in that: the transformer comprehensive performance test system is provided with four-stage protection, including input stage protection, output stage protection, measurement stage protection and test article level protection, can timely warn and rapidly make a protection action when a tested article or test equipment breaks down in the test process, and can give a corresponding prompt after the protection action so as to determine the fault reason.
4. The transformer comprehensive performance test system of claim 3, characterized in that: the input stage protection comprises the steps that overcurrent relay protection is arranged at the input end; the output stage protection comprises the steps that current relay protection is arranged at the output end, and the measurement stage protection is that in the measurement process, after the voltage or current value of each tester exceeds the measuring range, a warning is sent out and the operation is stopped; the test level protection is to set over-voltage and over-current protection according to the rated voltage and current value of the input end of the tested transformer.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117665463A (en) * | 2023-12-14 | 2024-03-08 | 山东省产品质量检验研究院 | Transformer test system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117665463A (en) * | 2023-12-14 | 2024-03-08 | 山东省产品质量检验研究院 | Transformer test system and method |
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