CN103076514A - Sound level measuring test method for dry-type smoothing reactor - Google Patents
Sound level measuring test method for dry-type smoothing reactor Download PDFInfo
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- CN103076514A CN103076514A CN201210565453XA CN201210565453A CN103076514A CN 103076514 A CN103076514 A CN 103076514A CN 201210565453X A CN201210565453X A CN 201210565453XA CN 201210565453 A CN201210565453 A CN 201210565453A CN 103076514 A CN103076514 A CN 103076514A
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Abstract
The invention relates to a sound level measuring test method for a dry-type smoothing reactor, belonging to the technical field of reactor tests. The technical scheme is that a high-capacity single-phase variable-frequency power supply (1), a first-stage boosting transformer (2), a low-voltage compensation capacitor set (3), a second-stage boosting transformer (4) and a high-voltage compensation capacitor set (5) are connected and then are connected with a tested smoothing reactor (6). The sound level measuring and sound pressure calculating method related in the invention is carried out according to national standard; the related measuring and calculating method of background noise and a correcting method for measurement results are carried out according to national standard; and the related current reducing method and total sound pressure calculating method are carried out according to national standard. In a laboratory for transformers, reactors and the like, test current required for measuring the sound level of the smoothing reactor can be provided for finishing sound level measurement of the dry-type smoothing reactor by using traditional test equipment, purchasing a variable-frequency power supply and using parameter calculation and reasonable matching of equipment.
Description
Technical field
The present invention relates to a kind of dry smoothing reactor sound level measurement test method, belong to reactor experimental technique field.
Background technology
Smoothing reactor is the visual plant in the DC power transmission line, and two types of dry type and oil immersed types are arranged.It is installed in the harmonic wave that the converter valve back is used for suppressing output current, makes the direct current of output close to desirable direct current, thereby improves the transmission of electricity quality, reduces circuit and equipment loss.In actual motion, the DC current that flows through smoothing reactor still contains a small amount of harmonic wave, and its working current is comprised of some harmonic currents and DC current.When the smoothing reactor winding passes through electric current, the electric current of winding of flowing through can innerly at reactor, outside produce magnetic field, magnetic field acts on the winding of current-carrying conversely, winding is produced magnetic field force, when by electric current in time during alternation, the size and Orientation in magnetic field changes thereupon, so the suffered magnetic field force of winding conducting wire changes in size, cause the vibration of winding, single DC current can not make the smoothing reactor basket vibration.When in the smoothing reactor during by two alternating currents with upper frequency, each frequency current produces respectively magnetic field force, and the magnetic field of simultaneously its generation also interacts and forms the magnetic field force of other frequency.And when in the smoothing reactor by with the DC current of harmonic wave the time, all harmonic currents respectively with the DC current reciprocation, form the vibration magnetic field force identical with the harmonic current frequency.Smoothing reactor individual harmonic current amplitude generally is no more than 5% of DC current, even at below 1% of DC current.Therefore the vibration electromagnetic force amplitude that produces of any two harmonic current interactions is far smaller than the magnetic field force that harmonic current and DC current interaction produce, the frequency spectrum of the main electromagnetic noise of smoothing reactor is that all the other compositions generally can be ignored by harmonic current and the interactional result of DC current.National standard is pointed out: because the restriction of the power supply aspect that is put to the test, the several main harmonic current that can propose according to the smoothing reactor technical manual, smoothing reactor is applied the unifrequency test current one by one carry out sound level measurement, and calculate thus smoothing reactor overall sound pressure level and total acoustic power level.The magnetic field force that test current produces equates when interacting with DC current with main harmonic current.The frequency of test current is got 1/2 of harmonic current frequency, and the root-mean-square valve of test current is calculated as follows:
In the formula :-harmonic current root-mean-square valve;--rated direct current
Based on above testing requirements, each device fabrication producer basis equipment situation is separately sought separately testing program and is finished the smoothing reactor sound level measurement; How can require to finish test according to GB, be the technical matters that this area needs to be resolved hurrily.
Summary of the invention
The purpose of this invention is to provide a kind of dry smoothing reactor sound level measurement test method, reasonable coordination by each device parameter in the circuit, the test current that can provide the smoothing reactor sound level measurement to need, finish the dry smoothing reactor sound level measurement, solve the problems referred to above that background technology exists.
Technical scheme of the present invention is:
A kind of dry smoothing reactor sound level measurement test method, large capacity single phase inverter power supply, first class boost transformer, low-voltage compensation capacitor group, secondary step-up transformer and after the high voltage compensating capacitor group is connected connect by the test smoothing reactor again;
Large capacity single phase inverter power supply, input power three-phase 380V ± 10%, 50Hz, output rating ≮ 300kW, the single-phase 0～350V of rated output voltage is adjustable continuously, and output waveform is standard sine wave, and maximum output frequency ≮ 300Hz has the reactive load ability;
First class boost transformer and secondary step-up transformer are used in conjunction with, and have continuous voltage ratio, satisfy the voltage ratio of smoothing reactor trial voltage and variable-frequency power sources output voltage;
The high voltage compensating capacitor group works under frequency ≮ 300Hz, has multiple adjustable compensation way, and adjusting offset current that can be careful, continuous, offset current satisfy smoothing reactor test current needs;
Low-voltage compensation capacitor group, under frequency ≮ 300Hz, work, have multiple adjustable compensation way, adjusting offset current that can be careful, continuous, close use with the high voltage compensating capacitor assembly, the output voltage of control variable-frequency power sources, electric current are in rated range;
Test comprises following steps:
1. the harmonic current that provides according to the smoothing reactor technical manual according to the computing method that national standard provides, calculates test current root-mean-square valve and the frequency of corresponding harmonic current, calculates the smoothing reactor trial voltage according to test current again;
2. select the voltage ratio of first class boost transformer and secondary step-up transformer according to trial voltage;
3. determine the connected mode of high voltage compensating capacitor group according to test current, the offset current of calculating equals test current;
4. connect conductor cross-section and satisfy corresponding test current requirement; Insulation distance satisfies corresponding trial voltage requirement between each testing equipment, wire; Tested smoothing reactor arranged around measuring point according to standard-required;
5. close a floodgate step by step and send electricity, and monitoring wire voltage, current conditions, the each side situation normally stable and meet the requirements of test current after carry out sound level measurement;
6. carry out one by one sound level measurement and the result of calculation of each test current according to abovementioned steps, and calculate accordingly the smoothing reactor overall sound pressure level.
The present invention can also arrange 50Hz three-phase generation unit and triphase step-down transformer before large capacity single phase inverter power supply, 50Hz three-phase generation unit and triphase step-down transformer are used in conjunction with, lacking 380V, input voltage, the electric current of variable-frequency power sources is being provided during the power supply of ≮ 1000A.
Test product sound level measurement and the sound pressure level computing method that the present invention relates to are carried out according to national standard; The modification method of the measurement of the ground unrest that relates to and calculating, measurement result carries out according to national standard; The electric current conversion, the overall sound pressure level that relate to calculate and carry out according to national standard.
Good effect of the present invention: the testing laboratory that is engaged in transformer, reactor series products, utilize existing testing equipment, only need purchase variable-frequency power sources, reasonable coordination by calculation of parameter and equipment, the test current that can provide the smoothing reactor sound level measurement to need is finished the dry smoothing reactor sound level measurement.
Description of drawings
Fig. 1 is the embodiment of the invention one connection schematic diagram;
Fig. 2 is the embodiment of the invention two circuit connection diagrams;
Among the figure: large capacity single phase inverter power supply 1, first class boost transformer 2, low-voltage compensation capacitor group 3, secondary step-up transformer 4, high voltage compensating capacitor group 5, quilt are tested smoothing reactor 6,50Hz three-phase generation unit 7, triphase step-down transformer 8.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described by embodiment.
Embodiment one, with reference to accompanying drawing 1, a kind of dry smoothing reactor sound level measurement test method, large capacity single phase inverter power supply 1, first class boost transformer 2, low-voltage compensation capacitor group 3, secondary step-up transformer 4 are connected with the high voltage compensating capacitor group connect after, connect again by test smoothing reactor 6;
Large capacity single phase inverter power supply, input power three-phase 380V ± 10%, 50Hz, output rating ≮ 300kW, the single-phase 0～350V of rated output voltage is adjustable continuously, and output waveform is standard sine wave, and maximum output frequency ≮ 300Hz has the reactive load ability;
First class boost transformer and secondary step-up transformer are used in conjunction with, and have continuous voltage ratio, satisfy the voltage ratio of smoothing reactor trial voltage and variable-frequency power sources output voltage;
The high voltage compensating capacitor group works under frequency ≮ 300Hz, has multiple adjustable compensation way, and adjusting offset current that can be careful, continuous, offset current satisfy smoothing reactor test current needs;
Low-voltage compensation capacitor group, under frequency ≮ 300Hz, work, have multiple adjustable compensation way, adjusting offset current that can be careful, continuous, close use with the high voltage compensating capacitor assembly, the output voltage of control variable-frequency power sources, electric current are in rated range;
Test comprises following steps:
1. the harmonic current that provides according to the smoothing reactor technical manual according to the computing method that national standard provides, calculates test current root-mean-square valve and the frequency of corresponding harmonic current, calculates the smoothing reactor trial voltage according to test current again;
2. select the voltage ratio of first class boost transformer and secondary step-up transformer according to trial voltage;
3. determine the connected mode of high voltage compensating capacitor group according to test current, the offset current of calculating equals test current;
4. connect conductor cross-section and satisfy corresponding test current requirement; Insulation distance satisfies corresponding trial voltage requirement between each testing equipment, wire; Tested smoothing reactor arranged around measuring point according to standard-required;
5. close a floodgate step by step and send electricity, and monitoring wire voltage, current conditions, the each side situation normally stable and meet the requirements of test current after carry out sound level measurement;
6. carry out one by one sound level measurement and the result of calculation of each test current according to abovementioned steps, and calculate accordingly the smoothing reactor overall sound pressure level.
Embodiment two, with reference to accompanying drawing 2,50Hz three-phase generation unit 7 and triphase step-down transformer 8 are set before large capacity single phase inverter power supply 1,50Hz three-phase generation unit and triphase step-down transformer are used in conjunction with, and are lacking 380V, and input voltage, the electric current of variable-frequency power sources is provided during the power supply of ≮ 1000A.
Claims (2)
1. dry smoothing reactor sound level measurement test method, it is characterized in that large capacity single phase inverter power supply (1), first class boost transformer (2), low-voltage compensation capacitor group (3), secondary step-up transformer (4) be connected 5 with the high voltage compensating capacitor group) connect after, connect again by test smoothing reactor (6);
Large capacity single phase inverter power supply, input power three-phase 380V ± 10%, 50Hz, output rating ≮ 300kW, the single-phase 0～350V of rated output voltage is adjustable continuously, and output waveform is standard sine wave, and maximum output frequency ≮ 300Hz has the reactive load ability;
First class boost transformer and secondary step-up transformer are used in conjunction with, and have continuous voltage ratio, satisfy the voltage ratio of smoothing reactor trial voltage and variable-frequency power sources output voltage;
The high voltage compensating capacitor group works under frequency ≮ 300Hz, has multiple adjustable compensation way, and adjusting offset current that can be careful, continuous, offset current satisfy smoothing reactor test current needs;
Low-voltage compensation capacitor group, under frequency ≮ 300Hz, work, have multiple adjustable compensation way, adjusting offset current that can be careful, continuous, close use with the high voltage compensating capacitor assembly, the output voltage of control variable-frequency power sources, electric current are in rated range;
Test comprises following steps:
1. the harmonic current that provides according to the smoothing reactor technical manual according to the computing method that national standard provides, calculates test current root-mean-square valve and the frequency of corresponding harmonic current, calculates the smoothing reactor trial voltage according to test current again;
2. select the voltage ratio of first class boost transformer and secondary step-up transformer according to trial voltage;
3. determine the connected mode of high voltage compensating capacitor group according to test current, the offset current of calculating equals test current;
4. connect conductor cross-section and satisfy corresponding test current requirement; Insulation distance satisfies corresponding trial voltage requirement between each testing equipment, wire; Tested smoothing reactor arranged around measuring point according to standard-required;
5. close a floodgate step by step and send electricity, and monitoring wire voltage, current conditions, the each side situation normally stable and meet the requirements of test current after carry out sound level measurement;
6. carry out one by one sound level measurement and the result of calculation of each test current according to abovementioned steps, and calculate accordingly the smoothing reactor overall sound pressure level.
2. a kind of dry smoothing reactor sound level measurement test method according to claim 1, it is characterized in that at large capacity single phase inverter power supply (1) the front 50Hz of setting three-phase generation unit (7) and triphase step-down transformer (8), 50Hz three-phase generation unit and triphase step-down transformer are used in conjunction with, lacking 380V, input voltage, the electric current of variable-frequency power sources is being provided during the power supply of ≮ 1000A.
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| CN201210565453XA CN103076514A (en) | 2012-12-24 | 2012-12-24 | Sound level measuring test method for dry-type smoothing reactor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103512652A (en) * | 2013-09-12 | 2014-01-15 | 国家电网公司 | Boundary background noise testing method suitable for transformer substation during operation |
| CN105784105A (en) * | 2016-03-04 | 2016-07-20 | 广东美的制冷设备有限公司 | Noise detecting device and noise detecting method for reactor in air conditioner |
| CN107390055A (en) * | 2017-07-20 | 2017-11-24 | 上海思源电力电容器有限公司 | A kind of power capacitor noise equivalent current test method |
| CN112345855A (en) * | 2020-10-30 | 2021-02-09 | 浙江大学 | System and method for detecting running state of shunt reactor |
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| JP2005072198A (en) * | 2003-08-22 | 2005-03-17 | Toyota Motor Corp | Method and device for reducing noise of reactor |
| US20100277886A1 (en) * | 2006-12-28 | 2010-11-04 | Abb Technology Ltd. | Power transformer/reactor |
| CN102435874A (en) * | 2011-09-09 | 2012-05-02 | 国网电力科学研究院 | Method for measuring high-voltage power transmission equipment noise |
| CN202454417U (en) * | 2012-02-22 | 2012-09-26 | 明珠电气有限公司 | Dry type smoothing reactor |
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2012
- 2012-12-24 CN CN201210565453XA patent/CN103076514A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005072198A (en) * | 2003-08-22 | 2005-03-17 | Toyota Motor Corp | Method and device for reducing noise of reactor |
| US20100277886A1 (en) * | 2006-12-28 | 2010-11-04 | Abb Technology Ltd. | Power transformer/reactor |
| CN102435874A (en) * | 2011-09-09 | 2012-05-02 | 国网电力科学研究院 | Method for measuring high-voltage power transmission equipment noise |
| CN202454417U (en) * | 2012-02-22 | 2012-09-26 | 明珠电气有限公司 | Dry type smoothing reactor |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103512652A (en) * | 2013-09-12 | 2014-01-15 | 国家电网公司 | Boundary background noise testing method suitable for transformer substation during operation |
| CN103512652B (en) * | 2013-09-12 | 2015-05-20 | 国家电网公司 | Boundary background noise testing method suitable for transformer substation during operation |
| CN105784105A (en) * | 2016-03-04 | 2016-07-20 | 广东美的制冷设备有限公司 | Noise detecting device and noise detecting method for reactor in air conditioner |
| CN107390055A (en) * | 2017-07-20 | 2017-11-24 | 上海思源电力电容器有限公司 | A kind of power capacitor noise equivalent current test method |
| CN112345855A (en) * | 2020-10-30 | 2021-02-09 | 浙江大学 | System and method for detecting running state of shunt reactor |
| CN112345855B (en) * | 2020-10-30 | 2021-10-08 | 浙江大学 | System and method for detecting running state of shunt reactor |
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Application publication date: 20130501 |