CN203164258U - High-voltage direct current wide frequency domain corona current measuring system - Google Patents
High-voltage direct current wide frequency domain corona current measuring system Download PDFInfo
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- CN203164258U CN203164258U CN 201320020348 CN201320020348U CN203164258U CN 203164258 U CN203164258 U CN 203164258U CN 201320020348 CN201320020348 CN 201320020348 CN 201320020348 U CN201320020348 U CN 201320020348U CN 203164258 U CN203164258 U CN 203164258U
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Abstract
The utility model provides a high-voltage direct current wide frequency domain corona current measuring system, comprising a sampling resistance sensor, an extra-high voltage local end measuring unit, a fiber transmission unit, a safe position measuring end unit and a host computer; the fiber transmission unit comprises fibers and a fiber insulator; the sampling resistance sensor is in series connection with a to be measured extra-high voltage direct current circuit and combines an integrated extra-high voltage local unit with the extra-high voltage local end measuring unit; the integrated extra-high voltage local unit is in connection with the safe position measuring end unit through the fiber transmission unit; the host computer is in connection with the safe position measuring end unit; a sampling resistor in the sampling resistance sensor employs a zinc oxide ceramic tube type non-inductive resistor. The high-voltage direct current wide frequency domain corona current measuring system possesses the advantages of wide measuring frequency scope, strong anti-electromagnetic interference capability, etc, can stably operate under high voltage direct current environment and various bad natural environment conditions for a long term and provides effective technical means for deep research of high voltage direct current corona characteristics.
Description
Technical field
The utility model belongs to high-voltage testing equipment and field of measuring technique, is specifically related to a kind of high voltage direct current wide frequency domain corona current measuring system.
Background technology
For implementing national energy policy, guarantee power industry comprehensively, coordination, continuable sound development, State Grid Corporation of China has proposed to accelerate development the great strategic measure of alternating current-direct current extra-high voltage grid according to China's national situation.UHV transmission is to grow up on the basis of EHV transmission, can realize remote, big volume transport electric energy, and it is interconnected to be fit to large regional grid.Different with ultra-high voltage AC transmission, the circuit cost of extra-high voltage direct-current transmission is lower, and power attenuation is littler, is more suitable for the big capacity power delivery of overlength distance.
Because electric pressure is higher, inevitably corona phenomenon can take place on the extra-high voltage direct-current transmission lead.The extra high voltage direct current transmission line corona effect comprises corona loss, field effect, radio interference, audible noise and space ion stream etc.The raising of transmission voltage grade makes a lot of countries have higher requirement to anticorona phenomenon.In recent years, power delivery capacity and distance further improve in China, built and finished Xiang Jiaba-Shanghai ± 800kV extra-high voltage direct-current transmission engineering, simultaneously State Grid Corporation of China starts ± previous research work of 1100kV extra-high voltage direct-current transmission technology at present.Because China's extra high voltage direct current transmission line will be through different geographical and varying environment areas, along with the raising of electric pressure, the corona effect problem will be more outstanding.And the atmosphere quality of developed country and China differ greatly, and in association areas such as extra-high voltage direct-current line corona effects, the test figure that these are national and method for designing are difficult to directly use for China.Therefore need further investigate the corona effect of DC line.
More than the problem source relevant with electromagnetic environment be corona discharge mostly, and corona current to produce the space radiation electromagnetic field be exactly radio interference; The high-speed motion that corona produces ion causes the air compression and produces audible noise, and the DC line corona produces space charge, and then produces space electric field.Therefore, necessary primary study discloses the corona current of electromagnetic environment parameter and corona discharge essential characteristic.Corona discharge belongs to the randomness pulsed discharge, and frequency spectrum is very wide.On the engineering, to electromagnetic environment parameter such as radio interference, generally need measure more than the 30MHz.From the research angle, need consider more wide frequency domain.For this reason, must possess round-the-clock wide frequency domain corona current means of testing, for the extra high voltage line of studying Different Altitude and different climatic environments from now on, the corona current characteristic under the AC mixed set-up provide necessary condition.
The environmental effect that corona loss and corona cause is to need the two big key issues that solve in the DC transmission engineering, and corona current is the physical quantity directly related with corona loss and environmental effect, simultaneously also be to characterize the most direct physical quantity of line corona discharge scenario, can provide foundation to the conductor configurations of improving UHV transmission line by the research corona current.The power system measuring corona current only paid attention to studying corona loss in the past, and traditional measuring system sample frequency low (usually below 2MHz), measurement performance far can not satisfy the research demand of UHV transmission line audible noise, radio interference and direct current total electric field.Research by corona current needs to promote, China Electric Power Research Institute successfully develops the sampling detector that frequency response is 30MHz, Southern Power Grid Technology Research Center and Tsing-Hua University have developed the corona current measuring system that bandwidth is 50MHz, but these can't satisfy the demand of extra-high voltage direct-current corona characteristic research, need the further higher measuring system of development sample frequency.
The utility model content
In order to overcome above-mentioned the deficiencies in the prior art, the utility model provides a kind of high voltage direct current wide frequency domain corona current measuring system, have advantages such as survey frequency wide ranges, anti-electromagnetic interference capability be strong, can under extra-high voltage direct-current environment and various extreme natural environment condition, long-term stability move, for further investigation high voltage direct current corona characteristic provides effective technical means.
To achieve these goals, the utility model is taked following scheme:
A kind of high voltage direct current wide frequency domain corona current measuring system, described system comprise sample resistance sensor, the local end of extra-high voltage measuring unit, Optical Fiber Transmission unit, home measuring junction unit and host computer; Described Optical Fiber Transmission unit comprises optical fiber and optical fiber insulator, described sample resistance sensor is connected in the measured extra-high voltage direct-current circuit, itself and the local end of extra-high voltage measuring unit are formed the local unit of integrated extra-high voltage, the local unit of described integrated extra-high voltage connects home measuring junction unit by described Optical Fiber Transmission unit, described host computer connects described home measuring junction unit, and the sample resistance in the described sample resistance sensor adopts zinc oxide ceramics tubular type noninductive resistance.
The local unit of described integrated extra-high voltage comprises grading ring A, sample resistance sensor, optical fiber waterproof connector, extra-high voltage local end measuring unit and shading ring; Both sides, the local unit of integrated extra-high voltage are respectively equipped with sample resistance sensor and the local end of extra-high voltage measuring unit, the outside of the local end of described sample resistance sensor and extra-high voltage measuring unit is equipped with shading ring, the shading ring junction in described extra-high voltage local end measuring unit and its outside is provided with the optical fiber waterproof connector, in order to draw light signal.
Described sample resistance sensor comprises radome, epoxy resins insulation flange, PE insulation framework, envelope and sample resistance; The resistance of described sample resistance is identical, and parallel form is evenly arranged and adopted to circumference; Be positioned at described envelope inside, described envelope uses described PE insulation framework to do stressed supporting bracket, the outside in the PE insulation framework is provided with radome, and described sample resistance sensor two ends are connected with the pipe bus with the local end of extra-high voltage measuring unit by described epoxy resins insulation flange respectively.
The local end of described extra-high voltage measuring unit comprises high-speed broadband numeric field data collecting unit, USB interface, photoelectric conversion unit A, serial line interface, Integrated Energy control module and independently-powered unit; Described high-speed broadband numeric field data collecting unit is connected with described sample resistance sensor, and it is gathered described voltage signal, and described voltage signal is imported described photoelectric conversion unit A by described USB interface, through being converted to described light signal; Described Integrated Energy control module is connected with photoelectric conversion unit A by serial line interface; Described independently-powered unit is high-speed broadband numeric field data collecting unit, Integrated Energy control module and photoelectric conversion unit A power supply.
Described independently-powered unit comprises accumulator, and described accumulator comprises battery protecting plate, and described accumulator adopts LiFePO 4 material, and its nominal capacity is 40Ah.
Described accumulator comprises the optical fiber charhing unit, utilizes optical fiber that described accumulator is carried out the light signal charging.
Described high-speed broadband numeric field data collecting unit comprises AD converting unit, FPGA unit, ARM control module, buffer cell and network transmission unit; Described AD converting unit is controlled according to sampling clock in described FPGA unit will be converted to digital signal through the corona current signal that the sample resistance sensor obtains, and control buffer cell A digital signal carry out buffer memory, described ARM control module control FPGA unit and buffering unit B are to the transmission of described digital signal, and described network transmission unit is transferred to described photoelectric conversion unit A with digital signal by described USB interface.
Described Integrated Energy control module comprises power input interface, power conversion unit, power-supplying circuit, central control unit, holding circuit, power output interface A and power output interface B; Described power conversion unit connects described independently-powered unit by described power input interface; it is the power supply of described CPU (central processing unit) and power-supplying circuit on the one hand; control described power output interface A on the other hand and export different voltages respectively with power output interface B; described central control unit is controlled described holding circuit and power-supplying circuit; realize the control of power supply output by the break-make of described power-supplying circuit; described holding circuit comprises gas-discharge tube and the TVS pipe in parallel with it, so that described Integrated Energy control module is not impacted by instantaneous high pressure.
Described optical fiber adopts outdoor multimode optical cable, and described optical fiber insulator is transferred to described light signal to described home measuring junction unit from the local end of extra-high voltage measuring unit.
Described home measuring junction unit comprises photoelectric conversion unit B, USB interface, serial line interface and power supply unit; Described USB interface is connected with described photoelectric conversion unit respectively with serial line interface, and described power supply unit is photoelectric conversion unit B power supply.
Described host computer is connected with described home measuring junction unit by USB interface and serial line interface, and its reception, preservation are also handled described voltage signal, and then obtain the corona current signal.
The sampling frequency of described corona current signal is 1kHz～1GHz, and sampling depth is 1kB～128MB.
Compared with prior art, the beneficial effects of the utility model are:
1. the sample resistance sensor adopts the form of sample resistance circumference parallel connection, and distorted signals is little, the survey frequency wide ranges, can reach 500MHz, and does not produce corona discharge under the extra-high voltage environment; The spread pattern of this electric resistance sensor can more effective reduction sample resistance inductance and distributed capacitance parameter, improve the frequency response parameter greatly;
2. adopt high-speed broadband numeric field data collecting unit, sample frequency height, storage depth are big, can better gather the corona current signal;
3. sample resistance sensor and the unification of the local end of extra-high voltage measuring unit are installed in the local unit of integrated extra-high voltage, make sampling, collection and the processing procedure of corona current signal not be subjected to the influence of extraneous extra-high voltage electromagnetic environment to greatest extent, have good effectiveness;
4. adopt the digital optical fiber transmission unit, bandwidth, decay are lacked, and antijamming capability is strong, and coverage is big, can satisfy the remote measurement demand;
5. optical fiber insulator is effectively isolated high-low pressure, and the data transmission in the protection optical fiber is not subjected to the influence of extra-high voltage special electromagnetic environment, guarantees corona current data high-speed, safe and reliable transmission;
6. the wide frequency domain corona current measuring system that proposes of the utility model can operation steady in a long-term under extra-high voltage direct-current environment and various extreme natural environment condition.
Description of drawings
Fig. 1 is high voltage direct current wide frequency domain corona current measuring system structured flowchart;
Fig. 2 is the local cellular construction synoptic diagram of integrated extra-high voltage in the high voltage direct current wide frequency domain corona current measuring system;
Fig. 3 is optical fiber insulator synoptic diagram in the high voltage direct current wide frequency domain corona current measuring system;
Fig. 4 is that high voltage direct current wide frequency domain corona current measuring system high speed wide frequency domain data acquisition unit is formed synoptic diagram;
Fig. 5 is Integrated Energy control module synoptic diagram in the high voltage direct current wide frequency domain corona current measuring system;
Fig. 6 is that host computer receives, preserves and handle the voltage signal process flow diagram in the high voltage direct current wide frequency domain corona current measuring system;
Fig. 7 is corona current measurement result synoptic diagram among the embodiment.
Wherein: 1. grading ring A, 2. radome, 3. epoxy resins insulation flange, 4.PE insulation framework, 5. envelope, 7. accumulator, 8. optical fiber waterproof connector, the 9. local end of extra-high voltage measuring unit, 10. shading ring, 11. sample resistance, 12. low pressure end connects gold utensil, 13. low pressure measurement end optical fiber interconnecting devices, and 14. optical fiber insulators prolong gold utensil, 15. high-tension measurement end optical fiber interconnecting device, 16. optical fiber insulator is coil tension spring fixedly, 17. optical fiber insulators and outdoor optical fiber connecting interface, 18. optical fiber insulators and measuring system optical fiber connecting interface, 19. grading ring B, 20. insulators.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
As Fig. 1, a kind of high voltage direct current wide frequency domain corona current measuring system, described system comprise sample resistance sensor, the local end of extra-high voltage measuring unit, Optical Fiber Transmission unit, home measuring junction unit and host computer; Described Optical Fiber Transmission unit comprises optical fiber and optical fiber insulator, described sample resistance sensor is connected in the measured extra-high voltage direct-current circuit, itself and the local end of extra-high voltage measuring unit are formed the local unit of integrated extra-high voltage, the local unit of described integrated extra-high voltage connects home measuring junction unit by described Optical Fiber Transmission unit, described host computer connects described home measuring junction unit, and the sample resistance 11 in the described sample resistance sensor adopts zinc oxide ceramics tubular type noninductive resistance.
As Fig. 2, the local unit of described integrated extra-high voltage comprises grading ring A1, sample resistance sensor, optical fiber waterproof connector 8, extra-high voltage local end measuring unit 9 and shading ring 10; Both sides, the local unit of integrated extra-high voltage are respectively equipped with sample resistance sensor and the local end of extra-high voltage measuring unit, the outside of the local end of described sample resistance sensor and extra-high voltage measuring unit is equipped with shading ring, the shading ring junction in described extra-high voltage local end measuring unit and its outside is provided with the optical fiber waterproof connector, it adopts four-core optical fiber waterproof plug, being used for being connected with optical fiber insulator, is the transmission interface of light signal.Grading ring A prevents surface-discharge for reducing the local cell surface field intensity of integrated extra-high voltage.
Described sample resistance sensor comprises the sample resistance 11 of radome 2, epoxy resins insulation flange 3, PE insulation framework 4, envelope 5 and 4 similar resistance; Parallel form is evenly arranged and adopted to 4 sample resistance 11 circumference; Be positioned at described envelope 5 inside, described envelope 5 uses described PE insulation framework 4 to do stressed supporting bracket, be provided with radome 2 in the outside of PE insulation framework 4, described sample resistance sensor two ends are connected with the pipe bus with the local end of extra-high voltage measuring unit 9 by described epoxy resins insulation flange 3 respectively.10 shielding actions of radome 2 and shading ring, better protection sample resistance sensor is not subjected to the interference of extra-high voltage direct-current electromagnetic field.Epoxy resins insulation flange 3, PE insulation framework 4 play a part fixing and support, and these strengths of materials are very high, can satisfy actual needed installation strength.
The local end of described extra-high voltage measuring unit 9 comprises high-speed broadband numeric field data collecting unit, USB interface, photoelectric conversion unit A, serial line interface, Integrated Energy control module and independently-powered unit; Described high-speed broadband numeric field data collecting unit is connected with described sample resistance sensor, and it is gathered described voltage signal, and described voltage signal is imported described photoelectric conversion unit A by described USB interface, through being converted to described light signal; Described Integrated Energy control module is connected with photoelectric conversion unit A by serial line interface; Described independently-powered unit is high-speed broadband numeric field data collecting unit, Integrated Energy control module and photoelectric conversion unit A power supply.
Described independently-powered unit comprises accumulator 7, and described accumulator 7 comprises battery protecting plate, and described accumulator 7 adopts LiFePO 4 material, and its nominal capacity is 40Ah.
Described accumulator 7 comprises the optical fiber charhing unit, utilizes optical fiber that described accumulator 7 is carried out the light signal charging.
As Fig. 3, described Optical Fiber Transmission unit comprises optical fiber and optical fiber insulator; Described optical fiber adopts outdoor multimode optical cable, and described optical fiber insulator is transferred to described light signal to described home measuring junction unit from the local end of extra-high voltage measuring unit.
Optical fiber insulator comprises that low pressure end connects gold utensil 12, low pressure measurement end optical fiber interconnecting device 13, optical fiber insulator prolongation gold utensil 14, high-tension measurement end optical fiber interconnecting device 15, optical fiber insulator fixedly coil tension spring 16, optical fiber insulator and outdoor optical fiber connecting interface 17, optical fiber insulator and measuring system optical fiber connecting interface 18, grading ring B19 and insulator 20; Wherein low pressure end connection gold utensil 12 is connected on the point of fixity of low potential side, low pressure measurement end optical fiber interconnecting device 13, high-tension measurement end optical fiber interconnecting device 15 is used for the switching of outdoor optical fiber and optical fiber insulator, optical fiber insulator and outdoor optical fiber connecting interface 17, optical fiber insulator and measuring system optical fiber connecting interface 18 are respectively the connecting interfaces of optical fiber insulator and outdoor optical fiber and the local unit of integrated extra-high voltage, optical fiber insulator fixedly coil tension spring 16 is used for providing the certain installation nargin of optical fiber insulator and mobility among a small circle, grading ring 19 is used for preventing surface-discharge, and insulator 20 is used for the insulation of circuit high-pressure side and test tower installation hanging point.
Described home measuring junction unit comprises photoelectric conversion unit B, USB interface, serial line interface and power supply unit; Described USB interface is connected with described photoelectric conversion unit respectively with serial line interface, and described power supply unit is photoelectric conversion unit B power supply;
As Fig. 4, described high-speed broadband numeric field data collecting unit comprises AD converting unit, FPGA unit, ARM control module, buffer cell and network transmission unit; Described AD converting unit is controlled according to sampling clock in described FPGA unit will be converted to digital signal through the corona current signal that the sample resistance sensor obtains, and control buffer cell A digital signal carry out buffer memory, described ARM control module control FPGA unit and buffering unit B are to the transmission of described digital signal, and described network transmission unit is transferred to described photoelectric conversion unit A with digital signal by described USB interface.
As Fig. 5, described Integrated Energy control module comprises power input interface, power conversion unit, power-supplying circuit, central control unit, holding circuit, power output interface A and power output interface B; Described power conversion unit connects described independently-powered unit by described power input interface; it is the power supply of described CPU (central processing unit) and power-supplying circuit on the one hand; control described power output interface A on the other hand and export different voltages respectively with power output interface B; described central control unit is controlled described holding circuit and power-supplying circuit; realize the control of power supply output by the break-make of described power-supplying circuit; described holding circuit comprises gas-discharge tube and the TVS pipe in parallel with it, so that described Integrated Energy control module is not impacted by instantaneous high pressure.
As Fig. 6, described host computer is connected with described home measuring junction unit by USB interface and serial line interface, and its reception, preservation are also handled described voltage signal, and then obtain the corona current signal.And will control the Integrated Energy control module, to reach the effect that reduces power consumption.
The sampling frequency of described corona current signal is 1kHz～1GHz, and sampling depth is 1kB～128MB.
This system has been installed in State Grid Corporation of China extra-high voltage direct-current test base and has come into operation, has carried out a large amount of corona currents and has measured research work.This test base has the test line segment of 1084 meters of total lengths, can do the common-tower double-return test, two times can reach ± 1200kV of the highest grade of DC voltage.Its extra-high voltage bipolar DC generator is as the direct supply of extra-high voltage direct-current test base, and output voltage is the highest can be reached for ± 1200kV, and output current is 0.5A.
As Fig. 7, can draw different polar conductors to the influence rule of ground level to the corona current measurement result.
Should be noted that at last: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit, although with reference to above-described embodiment the utility model is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or be equal to replacement embodiment of the present utility model, and do not break away from any modification of the utility model spirit and scope or be equal to replacement, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (12)
1. high voltage direct current wide frequency domain corona current measuring system is characterized in that: described system comprises sample resistance sensor, the local end of extra-high voltage measuring unit, Optical Fiber Transmission unit, home measuring junction unit and host computer; Described Optical Fiber Transmission unit comprises optical fiber and optical fiber insulator, described sample resistance sensor is connected in the measured extra-high voltage direct-current circuit, itself and the local end of extra-high voltage measuring unit are formed the local unit of integrated extra-high voltage, the local unit of described integrated extra-high voltage connects home measuring junction unit by described Optical Fiber Transmission unit, described host computer connects described home measuring junction unit, and the sample resistance in the described sample resistance sensor adopts zinc oxide ceramics tubular type noninductive resistance.
2. high voltage direct current wide frequency domain corona current measuring system according to claim 1 is characterized in that: the local unit of described integrated extra-high voltage comprises grading ring A, sample resistance sensor, optical fiber waterproof connector, extra-high voltage local end measuring unit and shading ring; Both sides, the local unit of integrated extra-high voltage are respectively equipped with sample resistance sensor and the local end of extra-high voltage measuring unit, the outside of the local end of described sample resistance sensor and extra-high voltage measuring unit is equipped with shading ring, the shading ring junction in described extra-high voltage local end measuring unit and its outside is provided with the optical fiber waterproof connector, in order to draw light signal.
3. high voltage direct current wide frequency domain corona current measuring system according to claim 1, it is characterized in that: described sample resistance sensor comprises radome, epoxy resins insulation flange, PE insulation framework, envelope and sample resistance; The resistance of described sample resistance is identical, and parallel form is evenly arranged and adopted to circumference; Be positioned at described envelope inside, described envelope uses described PE insulation framework to do stressed supporting bracket, the outside in the PE insulation framework is provided with radome, and described sample resistance sensor two ends are connected with the pipe bus with the local end of extra-high voltage measuring unit by described epoxy resins insulation flange respectively.
4. high voltage direct current wide frequency domain corona current measuring system according to claim 1 is characterized in that: the local end of described extra-high voltage measuring unit comprises high-speed broadband numeric field data collecting unit, USB interface, photoelectric conversion unit A, serial line interface, Integrated Energy control module and independently-powered unit; Described high-speed broadband numeric field data collecting unit is connected with described sample resistance sensor, and it is gathered described voltage signal, and described voltage signal is imported described photoelectric conversion unit A by described USB interface, through being converted to described light signal; Described Integrated Energy control module is connected with photoelectric conversion unit A by serial line interface; Described independently-powered unit is high-speed broadband numeric field data collecting unit, Integrated Energy control module and photoelectric conversion unit A power supply.
5. high voltage direct current wide frequency domain corona current measuring system according to claim 4, it is characterized in that: described independently-powered unit comprises accumulator, and described accumulator comprises battery protecting plate, described accumulator adopts LiFePO 4 material.
6. high voltage direct current wide frequency domain corona current measuring system according to claim 5, it is characterized in that: described accumulator comprises the optical fiber charhing unit, utilizes optical fiber that described accumulator is carried out the light signal charging.
7. high voltage direct current wide frequency domain corona current measuring system according to claim 4, it is characterized in that: described high-speed broadband numeric field data collecting unit comprises AD converting unit, FPGA unit, ARM control module, buffer cell and network transmission unit; Described AD converting unit is controlled according to sampling clock in described FPGA unit will be converted to digital signal through the corona current signal that the sample resistance sensor obtains, and control buffer cell A digital signal carry out buffer memory, described ARM control module control FPGA unit and buffering unit B are to the transmission of described digital signal, and described network transmission unit is transferred to described photoelectric conversion unit A with digital signal by described USB interface.
8. high voltage direct current wide frequency domain corona current measuring system according to claim 4, it is characterized in that: described Integrated Energy control module comprises power input interface, power conversion unit, power-supplying circuit, central control unit, holding circuit, power output interface A and power output interface B; Described power conversion unit connects described independently-powered unit by described power input interface; it is the power supply of described CPU (central processing unit) and power-supplying circuit on the one hand; control described power output interface A on the other hand and export different voltages respectively with power output interface B; described central control unit is controlled described holding circuit and power-supplying circuit; realize the control of power supply output by the break-make of described power-supplying circuit; described holding circuit comprises gas-discharge tube and the TVS pipe in parallel with it, so that described Integrated Energy control module is not impacted by instantaneous high pressure.
9. high voltage direct current wide frequency domain corona current measuring system according to claim 1, it is characterized in that: described optical fiber adopts outdoor multimode optical cable, and described optical fiber insulator is transferred to described light signal to described home measuring junction unit from the local end of extra-high voltage measuring unit.
10. high voltage direct current wide frequency domain corona current measuring system according to claim 1, it is characterized in that: described home measuring junction unit comprises photoelectric conversion unit B, USB interface, serial line interface and power supply unit; Described USB interface is connected with described photoelectric conversion unit respectively with serial line interface, and described power supply unit is photoelectric conversion unit B power supply.
11. high voltage direct current wide frequency domain corona current measuring system according to claim 1, it is characterized in that: described host computer is connected with described home measuring junction unit by USB interface and serial line interface, its reception, preservation are also handled described voltage signal, and then obtain the corona current signal.
12. high voltage direct current wide frequency domain corona current measuring system according to claim 1, it is characterized in that: the sampling frequency of described corona current signal is 1kHz～1GHz, and sampling depth is 1kB～128MB.
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| CN 201320020348 CN203164258U (en) | 2012-08-07 | 2013-01-15 | High-voltage direct current wide frequency domain corona current measuring system |
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| CN201220389836.1 | 2012-08-07 | ||
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| CN 201320020348 CN203164258U (en) | 2012-08-07 | 2013-01-15 | High-voltage direct current wide frequency domain corona current measuring system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103499735A (en) * | 2013-07-02 | 2014-01-08 | 华北电力大学 | Device for collecting high-potential corona current |
| CN103558515A (en) * | 2013-10-22 | 2014-02-05 | 国家电网公司 | Corona generating and measuring device of high-voltage DC wire |
| WO2014023227A1 (en) * | 2012-08-07 | 2014-02-13 | 国家电网公司 | High-voltage direct current broad frequency-domain corona current measurement system |
| CN106645865A (en) * | 2016-09-19 | 2017-05-10 | 中国电力科学研究院 | Device for measuring corona current of high-voltage transmission line |
| CN116953451A (en) * | 2023-08-01 | 2023-10-27 | 华北电力大学（保定） | Test system and test method for negative polarity corona discharge |
-
2013
- 2013-01-15 CN CN 201320020348 patent/CN203164258U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014023227A1 (en) * | 2012-08-07 | 2014-02-13 | 国家电网公司 | High-voltage direct current broad frequency-domain corona current measurement system |
| CN103499735A (en) * | 2013-07-02 | 2014-01-08 | 华北电力大学 | Device for collecting high-potential corona current |
| CN103558515A (en) * | 2013-10-22 | 2014-02-05 | 国家电网公司 | Corona generating and measuring device of high-voltage DC wire |
| CN106645865A (en) * | 2016-09-19 | 2017-05-10 | 中国电力科学研究院 | Device for measuring corona current of high-voltage transmission line |
| CN106645865B (en) * | 2016-09-19 | 2020-07-24 | 中国电力科学研究院 | Device for measuring corona current of high-voltage transmission line |
| CN116953451A (en) * | 2023-08-01 | 2023-10-27 | 华北电力大学（保定） | Test system and test method for negative polarity corona discharge |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130828 |