CN204479671U - A kind of DC converter station direct current arrester electrification detection system - Google Patents
A kind of DC converter station direct current arrester electrification detection system Download PDFInfo
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- CN204479671U CN204479671U CN201520116002.7U CN201520116002U CN204479671U CN 204479671 U CN204479671 U CN 204479671U CN 201520116002 U CN201520116002 U CN 201520116002U CN 204479671 U CN204479671 U CN 204479671U
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Abstract
The utility model discloses a kind of DC converter station direct current arrester electrification detection system, it comprises: high voltage dc bus, direct current arrester, bus-bar potential transformer, current sample module, voltage sample module and harmonic analysis instrument and resistance meter, harmonic analysis instrument and the equal received current sampling module of resistance meter, voltage sample module is respectively by direct current arrester, the current data sequence that bus-bar potential transformer extracts and voltage data sequence, thus by harmonic analysis instrument, current data sequence and voltage data sequence are shown, shown by the resistance value of resistance meter to direct current arrester, reach the reliability judging direct current arrester.The utility model decreases the aging factor such as to make moist to the adverse effect of direct current arrester, improves the security that straight-flow system is run.
Description
Technical field
The utility model relates to straight-flow system service technique field, is specifically related to a kind of on-line detecting system of DC converter station direct current arrester.
Background technology
Along with the rapid development of Chinese society's economy and the continuous progress of science and technology, the demand of entire society to electric energy is increasing, and therefore electrical network scale constantly expands.But there is serious asymmetric problem in Chinese energy distribution and economic development, the economically developed energy in east and south is few, Western Energy Resources enriches but economy comparatively backwardness, therefore Western Energy Resources is effectively transported to east and south, contributes to the sustainable development of national economy.High-voltage direct-current technology of transmission of electricity is with the obvious advantage in remote Large Copacity conveying because of it, and in the large ground of China, the super extra-high voltage DC transmission system of existing many friendships puts into operation.
Direct current arrester is a power equipment main in high-voltage direct-current technology of transmission of electricity; lightning arrester is mainly used in limiting the lightning surge that circuit transmits or the internal overvoltage having operation to cause; be one of important proterctive equipment ensureing safe operation of power system, its safe power supply of normal operation to the system of guarantee plays an important role.Generally use Zinc-Oxide Arrester MOA at present, in operation of power networks process, internal wetted is often there is and the defect such as valve block is aging due to MOA, the performance of MOA can change in long-time running, originally the impedance threshold of MOA can not meet the requirement of electric power netting safe running, thus has had a strong impact on the safe operation of electric power supply.Therefore a kind of direct current arrester on-line detecting system is developed, can control in real time and determine the impedance threshold of direct current arrester, the safe and stable operation of direct current power system is had great significance, electric power supply is ensured there is important technical support, brings great economic benefit simultaneously.
Utility model content
One of the purpose of this utility model is, for above-mentioned converter transformer valve side lightning arrester characteristic of accident, to provide the direct current arrester on-line detecting system that a kind of good stability, reliability are high.
For realizing above object, the utility model takes following technical scheme:
A kind of DC converter station direct current arrester electrification detection system, it comprises:
High voltage dc bus, for generation of d. c. voltage signal;
Direct current arrester, the primary side of described direct current arrester and high voltage dc bus are electrically connected, and described d. c. voltage signal, after flowing through direct current arrester, produces a DC current signal in the ground side of direct current arrester;
Bus-bar potential transformer, the primary side of described bus-bar potential transformer and high voltage dc bus are electrically connected, for converting described d. c. voltage signal, the direct voltage output signal after the secondary side of bus-bar potential transformer produces a conversion;
Current sample module, the input end of described current sample module and the ground loop of direct current arrester are electrically connected, and for carrying out multiple repairing weld to described DC current signal, obtain the current data sequence of sampling;
Voltage sample module, the input end of described voltage sample module and the secondary side of bus-bar potential transformer are electrically connected, for carrying out multiple repairing weld to described direct voltage output signal, obtain the voltage data sequence of sampling, the quantity of described current data sequence and voltage data sequence is equal;
Display unit, described display unit comprises harmonic analysis instrument and resistance meter; Wherein, described harmonic analysis instrument is for receiving and showing the information of described current data sequence, voltage data sequence; Described resistance meter for receive described current data sequence, voltage data sequence information and show the DC resistance of direct current arrester.
Described current sample module comprises current sensor, first a/d conversion device, first central processing unit and the first wireless transceiver terminal, the sampling probe of described current sensor is serially connected in the ground loop of direct current arrester, the output terminal of described current sensor is connected with the input end of the first central processing unit by the first a/d conversion device, for current sensor is sent to the first central processing unit to the current data sequence that described DC current signal carries out multiple repairing weld acquisition after analog to digital conversion, the output terminal of described first central processing unit and the input end of the first wireless transceiver terminal are electrically connected, for the current data sequence after the analog to digital conversion of acquisition is sent to harmonic analysis instrument and resistance meter by the first wireless transceiver terminal.
Described voltage sample module comprises voltage sensor, second a/d conversion device, second central processing unit and the second wireless transceiver terminal, the sampling probe of described voltage sensor is serially connected in bus-bar potential transformer secondary side, the output terminal of described voltage sensor is connected with the input end of the second central processing unit by the second a/d conversion device, for voltage sensor is sent to the second central processing unit to the voltage data sequence that described direct voltage output signal carries out multiple repairing weld acquisition after analog to digital conversion, the output terminal of described second central processing unit and the input end of the second wireless transceiver terminal are electrically connected, for the voltage data sequence after the analog to digital conversion of acquisition is sent to harmonic analysis instrument and resistance meter by the second wireless transceiver terminal.
Described harmonic analysis instrument and resistance meter all carry out wireless telecommunications by a wireless transceiver master station and voltage sample module, voltage sample module, the input end of described wireless transceiver master station respectively with the output terminal wireless connections of the first wireless transceiver terminal, the second wireless transceiver terminal, the output terminal of described wireless transceiver master station is connected with resistance meter respectively with harmonic analysis instrument.
Described wireless transceiver master station, the first wireless transceiver terminal, the second wireless transceiver terminal are wireless router.
Described direct current arrester is Zinc-Oxide Arrester.
The utility model compared with prior art, tool has the following advantages: the utility model take Zinc-Oxide Arrester as subjects, with high voltage dc bus, bus-bar potential transformer, current sensor, voltage sensor, a/d conversion device, central processing unit, wireless transceiver terminal, wireless transceiver master station, harmonic analysis instrument and resistance meter are hardware condition, the current sequence signal in arrester ground loop and voltage sampling apparatus is taked to take busbar voltage sequence signal by current sampling device, the DC current values of direct current arrester is obtained by harmonic analysis instrument, the DC resistance of direct current arrester is obtained by resistance meter, judge the running status of direct current arrester.Decision method is: when the DC resistance R of direct current arrester be less than 2.5G Ω or DC current values I be greater than 50 microamperes time, have a power failure change direct current arrester; When rate of change when between DC resistance R twice live detection adjacent with DC current values I of direct current arrester is all greater than 30%, the cycle of the adjacent secondary live detection of reduction direct current arrester is to strengthen monitoring.Thus ensure the available protecting effect of direct current arrester, have directly perceived, fast, the advanced feature such as safety, decrease the aging factor such as to make moist to the adverse effect of direct current arrester.
Accompanying drawing explanation
Fig. 1 is the structure principle chart of a kind of DC converter station direct current arrester of the utility model electrification detection system.
Wherein: 1, high voltage dc bus; 2, direct current arrester; 3, bus-bar potential transformer; 4, current sample module; 41, current sensor; 42, a/d conversion device; 43, wireless transceiver terminal; 44, central processing unit; 5, voltage sample module; 51, voltage sensor; 52, a/d conversion device; 53, wireless transceiver terminal; 54, central processing unit; 6, wireless transceiver master station; 7, harmonic analysis instrument; 8, resistance meter.
Embodiment
Below in conjunction with the drawings and specific embodiments, content of the present utility model is described in further details.
Embodiment:
Please refer to shown in Fig. 1: a kind of DC converter station direct current arrester charged (online) detection system, be applicable to the performance test of converter transformer valve side direct current arrester and calculate the threshold values of direct current arrester, in use breaking down to prevent it.This detection system comprises: for providing d. c. voltage signal to do the high voltage dc bus 1 analyzed, for providing the DC current signal flowing through lightning arrester to do the direct current arrester 2 analyzed, for converting DC voltage so that voltage sensor 51 takes the bus-bar potential transformer 3 of data, for taking the current signal of direct current arrester 2 ground side and carrying out the current sample module 4 of AD conversion process, for taking the d. c. voltage signal of voltage transformer secondary side and carrying out the voltage sample module 5 of AD conversion process, one end respectively with current sample module 4, voltage sample module 5 is connected, the other end is connected with resistance meter 8 with harmonic analysis instrument 7, for realizing current sample module 4 and harmonic analysis instrument 7, between resistance meter 8 and voltage sample module 5 and harmonic analysis instrument 7, the wireless transceiver master station 6 of the communication between resistance meter 8, the voltage of coming is received from wireless transceiver master station for receiving, current data sequence also carries out harmonic analysis instrument 7 and the resistance meter 8 of corresponding display, wherein, harmonic analysis instrument 7 receiver voltage data sequence and current data sequence, mainly the DC current values of the direct current arrester 2 shown in current data sequence is monitored, resistance meter 8 receiver voltage data sequence and current data sequence, generate the DC resistance of display direct current arrester 2 voluntarily.
Current sample module 4 comprises current sensor 41, a/d conversion device 42, wireless transceiver terminal 43 and central processing unit 44, wherein the sampling probe of current sensor 41 is serially connected in direct current arrester 2 ground loop to take current signal, a/d conversion device 42 is connected with current sensor 41 and wireless transceiver terminal 43 respectively, and central processing unit 44 is connected with remainder and realizes the control of whole module.
Voltage sample module 5 comprises voltage sensor 51, a/d conversion device 52, wireless transceiver terminal 43 and central processing unit 54, wherein the sampling probe of voltage sensor 51 is serially connected in secondary side (the i.e. Secondary Winding side of bus-bar potential transformer 3, in like manner, primary side refers to a winding side) to take voltage signal, a/d conversion device 52 is connected with voltage sensor 51 and wireless transceiver terminal 53 respectively, and central processing unit 54 is connected with remainder and realizes the control of whole module.
Wireless transceiver master station 6 one end is connected with resistance meter 8 with harmonic analysis instrument 7, and the other end is then connected by wireless network realizes communication with the wireless transceiver terminal 43 in current sample module 4, voltage sample module 5, wireless transceiver terminal 53.
In embodiment, high voltage dc bus 1 can adopt the one pole H type aluminium trolley HXPnR-H of Tian Bao, Yangzhou group company, direct current arrester 2 can adopt the AM type direct supply lightning protection device of Guangdong An Xun lightning protection Science and Technology Co., Ltd., bus-bar potential transformer 3 can adopt the TAK type of Yao Hua Dechang Electronics Co., Ltd., current sensor 41 can adopt the B1 DC leakage flow sensor LF-MI11-35B1-1.0/0 ~ ± 10mA model of Shenzhen Xin Ruida company, the voltage sensor 51 HV series voltage sensor of Beijing New Chuang Si Fang Electronic Co., Ltd., a/d conversion device 42, a/d conversion device 52 can adopt the AD876 model of Wei Xue Electronics Co., Ltd. of Shenzhen, central processing unit 44, central processing unit 54 can adopt the single-chip microcomputer of Weisheng, Shenzhen hundred million generation Science and Technology Ltd., wireless transceiver terminal 43, wireless transceiver terminal 53 and wireless transceiver master station 6 all can adopt the SOHO wireless router of B-Link, harmonic analysis instrument 7 can adopt the MI2092 type Electric Power Harmonic Analysis instrument of U.S. emerald green (METREL) company of Germany, resistance meter 8 can adopt the MIT1020/2 type Insulation Resistance Tester of megger company of the U.S..
Above-listed detailed description is illustrating for the utility model possible embodiments, and this embodiment is also not used to limit the scope of the claims of the present utility model, does not allly depart from the equivalence that the utility model does and implements or change, and all should be contained in the scope of the claims of this case.
Claims (6)
1. a DC converter station direct current arrester electrification detection system, is characterized in that, it comprises:
High voltage dc bus (1), for generation of d. c. voltage signal;
Direct current arrester (2), primary side and the high voltage dc bus (1) of described direct current arrester (2) are electrically connected, described d. c. voltage signal, after flowing through direct current arrester (2), produces a DC current signal in the ground side of direct current arrester (2);
Bus-bar potential transformer (3), primary side and the high voltage dc bus (1) of described bus-bar potential transformer (3) are electrically connected, for converting described d. c. voltage signal, the direct voltage output signal after the secondary side of bus-bar potential transformer (3) produces a conversion;
Current sample module (4), the input end of described current sample module (4) and the ground loop of direct current arrester (2) are electrically connected, for carrying out multiple repairing weld to described DC current signal, obtain the current data sequence of sampling;
Voltage sample module (5), the input end of described voltage sample module (5) and the secondary side of bus-bar potential transformer (3) are electrically connected, for carrying out multiple repairing weld to described direct voltage output signal, obtain the voltage data sequence of sampling, the quantity of described current data sequence and voltage data sequence is equal;
Display unit, described display unit comprises harmonic analysis instrument (7) and resistance meter (8); Wherein, described harmonic analysis instrument (7) is for receiving and showing the information of described current data sequence, voltage data sequence; Described resistance meter (8) for receive described current data sequence, voltage data sequence information and show the DC resistance of direct current arrester (2).
2. DC converter station direct current arrester electrification detection system according to claim 1, it is characterized in that, described current sample module (4) comprises current sensor (41), first a/d conversion device (42), first central processing unit (44) and the first wireless transceiver terminal (43), the sampling probe of described current sensor (41) is serially connected in the ground loop of direct current arrester (2), the output terminal of described current sensor (41) is connected with the input end of the first central processing unit (44) by the first a/d conversion device (42), for current sensor (41) is sent to the first central processing unit (44) to the current data sequence that described DC current signal carries out multiple repairing weld acquisition after analog to digital conversion, the output terminal of described first central processing unit (44) and the input end of the first wireless transceiver terminal (43) are electrically connected, for the current data sequence after the analog to digital conversion obtained is sent to harmonic analysis instrument (7) and resistance meter (8) by the first wireless transceiver terminal (43).
3. DC converter station direct current arrester electrification detection system according to claim 2, it is characterized in that, described voltage sample module (5) comprises voltage sensor (51), second a/d conversion device (52), second central processing unit (54) and the second wireless transceiver terminal (53), the sampling probe of described voltage sensor (51) is serially connected in bus-bar potential transformer secondary side, the output terminal of described voltage sensor (51) is connected with the input end of the second central processing unit (54) by the second a/d conversion device (52), for voltage sensor (51) is sent to the second central processing unit (54) to the voltage data sequence that described direct voltage output signal carries out multiple repairing weld acquisition after analog to digital conversion, the output terminal of described second central processing unit (54) and the input end of the second wireless transceiver terminal (53) are electrically connected, for the voltage data sequence after the analog to digital conversion obtained is sent to harmonic analysis instrument (7) and resistance meter (8) by the second wireless transceiver terminal (53).
4. DC converter station direct current arrester electrification detection system according to claim 3, it is characterized in that, described harmonic analysis instrument (7) and resistance meter (8) are all by a wireless transceiver master station (6) and voltage sample module (5), current sample module (4) carries out wireless telecommunications, the input end of described wireless transceiver master station (6) respectively with the first wireless transceiver terminal (43), the output terminal wireless connections of the second wireless transceiver terminal (53), the output terminal of described wireless transceiver master station (6) is connected with resistance meter (8) respectively with harmonic analysis instrument (7).
5. DC converter station direct current arrester electrification detection system according to claim 4, it is characterized in that, described wireless transceiver master station (6), the first wireless transceiver terminal (43), the second wireless transceiver terminal (53) are wireless router.
6. the DC converter station direct current arrester electrification detection system according to any one of claim 1-5, is characterized in that, described direct current arrester (2) is Zinc-Oxide Arrester.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520116002.7U CN204479671U (en) | 2015-02-25 | 2015-02-25 | A kind of DC converter station direct current arrester electrification detection system |
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| CN201520116002.7U CN204479671U (en) | 2015-02-25 | 2015-02-25 | A kind of DC converter station direct current arrester electrification detection system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104698312A (en) * | 2015-02-25 | 2015-06-10 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | System and method for electrically detecting DC arrester of DC converter station |
| CN106908646A (en) * | 2015-12-22 | 2017-06-30 | 国网辽宁省电力有限公司沈阳供电公司 | Portable arrester live detection instrument based on wireless synchronization technology |
| CN109188066A (en) * | 2018-10-18 | 2019-01-11 | 江苏久创电气科技有限公司 | A kind of lightning arrester monitoring device and system |
-
2015
- 2015-02-25 CN CN201520116002.7U patent/CN204479671U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104698312A (en) * | 2015-02-25 | 2015-06-10 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | System and method for electrically detecting DC arrester of DC converter station |
| CN106908646A (en) * | 2015-12-22 | 2017-06-30 | 国网辽宁省电力有限公司沈阳供电公司 | Portable arrester live detection instrument based on wireless synchronization technology |
| CN106908646B (en) * | 2015-12-22 | 2018-11-02 | 国网辽宁省电力有限公司沈阳供电公司 | Portable arrester live detection instrument based on wireless synchronization technology |
| CN109188066A (en) * | 2018-10-18 | 2019-01-11 | 江苏久创电气科技有限公司 | A kind of lightning arrester monitoring device and system |
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