CN103116114B - Fault distance-finding method under a kind of DC de-icing device ground wire deicing pattern and system - Google Patents

Fault distance-finding method under a kind of DC de-icing device ground wire deicing pattern and system Download PDF

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Publication number
CN103116114B
CN103116114B CN201310025842.8A CN201310025842A CN103116114B CN 103116114 B CN103116114 B CN 103116114B CN 201310025842 A CN201310025842 A CN 201310025842A CN 103116114 B CN103116114 B CN 103116114B
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absolute value
icing device
positive pole
ground wire
cathode voltage
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CN103116114A (en
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朱坚
蔡延雷
唐金昆
顾保全
冯鸫
王奇
王一智
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Maintenance and Test Center of Extra High Voltage Power Transmission Co
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Maintenance and Test Center of Extra High Voltage Power Transmission Co
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Abstract

The present invention relates to DC de-icing device, particularly relate to the fault distance-finding method under a kind of DC de-icing device ground wire deicing pattern and system, comprising: obtain the cathode voltage absolute value U+ of fault moment DC de-icing device output, positive pole current absolute value I+, cathode voltage absolute value U-and cathodal current absolute value I-; According to described cathode voltage absolute value U+, positive pole current absolute value I+, cathode voltage absolute value U-and cathodal current absolute value I-, calculate the resistance between the positive pole of trouble spot and DC de-icing device or negative pole; According to the resistance per unit length r of described ground wire, obtain the distance between the positive pole of trouble spot and DC de-icing device or negative pole.The quick localization of faults position of the present invention.Thus realize the fault localization under DC de-icing device ground wire deicing pattern.

Description

Fault distance-finding method under a kind of DC de-icing device ground wire deicing pattern and system
Technical field
The present invention relates to DC transmission system, particularly relate to the fault distance-finding method under a kind of DC de-icing device ground wire deicing pattern and system.
Background technology
DC ice melting is a kind of practical, cost-effective anti-ice damage measure, substantially increases the defensive ability/resistance ability of electrical network to extreme climate, major natural disasters.Current DC de-icing device is applied to wire ice-melt more, effectively prevent to fall the generation of the serious accident such as tower, broken string because of the serious icing of wire.For meeting the ice-melt needs of aerial earth wire, improve the anti-ice ability of transmission line of electricity, domestic many covering devices have possessed ground wire deicing function by transformation comprehensively.In ground wire deicing transformation process, ground wire needs to increase insulation and segmented ground disconnecting link, so when device carries out ground wire deicing, the earth fault single-point metallic earthing that mainly clearance for insulation punctures or grounding switch is not opened and produced, if can not determine earth point in the short time during line ice coating and eliminate fault, will will threaten to the safety of electrical network.
Summary of the invention
The invention provides the fault distance-finding method under a kind of DC de-icing device ground wire deicing pattern and system, cannot the technical matters of the localization of faults fast to solve under DC de-icing device ground wire deicing pattern that prior art exists.
A fault distance-finding method under DC de-icing device ground wire deicing pattern, comprising:
Obtain the cathode voltage absolute value U+ of fault moment DC de-icing device output, positive pole current absolute value I+, cathode voltage absolute value U-and cathodal current absolute value I-;
According to described cathode voltage absolute value U+, positive pole current absolute value I+, cathode voltage absolute value U-and cathodal current absolute value I-, calculate the resistance between the positive pole of trouble spot and DC de-icing device or negative pole;
According to the resistance per unit length r of described ground wire, obtain the distance between the positive pole of trouble spot and DC de-icing device or negative pole.
Further, described according to described cathode voltage absolute value U+, positive pole current absolute value I+, cathode voltage absolute value U-and cathodal current absolute value I-, in order to avoid obscuring with positive and negative compute sign, with Id 1represent positive pole current absolute value I+, with Id 2represent cathodal current absolute value I-, the circular calculating the resistance between the positive pole of trouble spot and DC de-icing device or negative pole is:
Calculate a=U +id 2, b=(2U ++ U -) Id 2-(2U -+ U +) Id 1and c=-U -id 1;
Calculate k = - b + b 2 - 4 ac 2 a ;
Calculate the resistance of the positive pole of trouble spot and DC de-icing device
Calculate the resistance of the negative pole of trouble spot and DC de-icing device
Further, the distance between described trouble spot and the positive pole of DC de-icing device
Further, the distance between described trouble spot and the negative pole of DC de-icing device
A fault localization system under DC de-icing device ground wire deicing pattern, comprising:
Parameter acquisition module, for obtaining cathode voltage absolute value U+ that fault moment DC de-icing device exports, positive pole current absolute value I+, cathode voltage absolute value U-and cathodal current absolute value I-;
Resistance calculations module, for according to described cathode voltage absolute value U+, positive pole current absolute value I+, cathode voltage absolute value U-and cathodal current absolute value I-, in order to avoid obscuring with positive and negative compute sign, with Id 1represent positive pole current absolute value I+, with Id 2represent cathodal current absolute value I-, calculate the resistance between the positive pole of trouble spot and DC de-icing device or negative pole;
Fault distance computing module, for the resistance per unit length r according to described ground wire, obtains the distance between the positive pole of trouble spot and DC de-icing device or negative pole.
Further, described resistance calculations module, specifically for:
Calculate a=U +id 2, b=(2U ++ U -) Id 2-(2U -+ U +) Id 1and c=-U -id 1;
Calculate k = - b + b 2 - 4 ac 2 a ;
Calculate the resistance of the positive pole of trouble spot and DC de-icing device
Calculate the resistance of the negative pole of trouble spot and DC de-icing device
Further, in described fault distance computing module, the distance between described trouble spot and the positive pole of DC de-icing device
Further, in described fault distance computing module, the distance between described trouble spot and the negative pole of DC de-icing device
The cathode voltage absolute value U+ that the present invention is exported by acquisition fault moment DC de-icing device, positive pole current absolute value I+, cathode voltage absolute value U-and cathodal current absolute value I-, calculate the resistance between the positive pole of trouble spot and DC de-icing device or negative pole, thus the distance fast between the positive pole of the localization of faults and DC de-icing device or negative pole.Thus realize the fault localization under DC de-icing device ground wire deicing pattern.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams figure of DC de-icing device ground wire deicing pattern;
Fig. 2 is the simplified mathematical model figure of DC de-icing device ground wire deicing pattern;
Fig. 3 is workflow diagram of the present invention;
Fig. 4 is construction module figure of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described in detail.
Be illustrated in figure 3 the workflow diagram of the fault distance-finding method under a kind of DC de-icing device ground wire deicing pattern, comprise:
Step S301, obtains the cathode voltage absolute value U+ of fault moment DC de-icing device output, positive pole current absolute value I+, cathode voltage absolute value U-and cathodal current absolute value I-;
Step S302, according to described cathode voltage absolute value U+, positive pole current absolute value I+, cathode voltage absolute value U-and cathodal current absolute value I-, calculates the resistance between the positive pole of trouble spot and DC de-icing device or negative pole;
Step S303, according to the resistance per unit length r of described ground wire, obtains the distance between the positive pole of trouble spot and DC de-icing device or negative pole.
Wherein, in step S302, according to cathode voltage absolute value U+, positive pole current absolute value I+, cathode voltage absolute value U-and cathodal current absolute value I-, calculate the method for the resistance between the positive pole of trouble spot and DC de-icing device or negative pole, those of ordinary skill in the art can supplement after reading this patent.
Wherein in an embodiment, described according to described cathode voltage absolute value U+, positive pole current absolute value I+, cathode voltage absolute value U-and cathodal current absolute value I-, the circular calculating the resistance between the positive pole of trouble spot and DC de-icing device or negative pole is:
Calculate a=U +id 2, b=(2U ++ U -) Id 2-(2U -+ U +) Id 1and c=-U -id 1;
Calculate k = - b + b 2 - 4 ac 2 a ;
Calculate the resistance of the positive pole of trouble spot and DC de-icing device
Wherein, the distance between described trouble spot and the positive pole of DC de-icing device
Wherein in an embodiment, described according to described cathode voltage absolute value U+, positive pole current absolute value I+, cathode voltage absolute value U-and cathodal current absolute value I-, the circular calculating the resistance between the positive pole of trouble spot and DC de-icing device or negative pole is:
Calculate a=U +id 2, b=(2U ++ U -) Id 2-(2U -+ U +) Id 1and c=-U -id 1;
Calculate k = - b + b 2 - 4 ac 2 a ;
Calculate the resistance of the negative pole of trouble spot and DC de-icing device
Wherein, the distance between described trouble spot and the negative pole of DC de-icing device
Above-mentioned computation process is discussed below:
With reference to Fig. 1, Fig. 2, actual track mode of connection when Fig. 1 is ground wire deicing, namely by wire as the line of return, the ice-melt mode of connection of two commonly line parallels.The simplified model that Fig. 2 makes when being and earth fault occurs, earth point is assumed to be place shown in arrow in figure, and described metallic earthing fault is mainly for modal single-point metallic earthing fault.Earth point to positive electrode resistance is R 1, be R to negative pole resistance 2, according to formula:
U + R 1 - U - R 2 = Id 1 - Id 2 - - - ( 1 )
U + + U - R 1 + R 2 + U - R 2 = Id 2 - - - ( 2 )
R 2＝kR 1(3)
In formula, U+, U_ are the DC voltage absolute value that fault moment DC de-icing device both positive and negative polarity exports, Id 1, Id 2for the DC current absolute value that device both positive and negative polarity exports.
According to above-mentioned formula, can obtain
R 1 = k U + - U - k ( Id 1 - Id 2 ) - - - ( 4 )
U +Id 2k 2+[(2U ++U -)Id 2-(2U -+U +)Id 1]k-U -Id 1＝0 (5)
Suppose:
a＝U +Id 2
b＝(2U ++U -)Id 2-(2U -+U +)Id 1
c＝-U -Id 1
Then have basis again with R 2=kR 1, thus calculate R 1and/or R 2.
Be illustrated in figure 4 the construction module figure of the fault localization system under a kind of DC de-icing device ground wire deicing pattern, comprise:
Parameter acquisition module 410, for obtaining cathode voltage absolute value U+ that fault moment DC de-icing device exports, positive pole current absolute value I+, cathode voltage absolute value U-and cathodal current absolute value I-;
Resistance calculations module 420, for according to described cathode voltage absolute value U+, positive pole current absolute value I+, cathode voltage absolute value U-and cathodal current absolute value I-, calculates the resistance between the positive pole of trouble spot and DC de-icing device or negative pole;
Fault distance computing module 430, for the resistance per unit length r according to described ground wire, obtains the distance between the positive pole of trouble spot and DC de-icing device or negative pole.
Wherein in an embodiment, described resistance calculations module 420, specifically for:
Calculate a=U +id 2, b=(2U ++ U -) Id 2-(2U -+ U +) Id 1and c=-U -id 1;
Calculate k = - b + b 2 - 4 ac 2 a ;
Calculate the resistance of the positive pole of trouble spot and DC de-icing device
Wherein, in described fault distance computing module 430, the distance between described trouble spot and the positive pole of DC de-icing device
Wherein in an embodiment, described resistance calculations module 420, specifically for:
Calculate a=U +id 2, b=(2U ++ U -) Id 2-(2U -+ U +) Id 1and c=-U -id 1;
Calculate k = - b + b 2 - 4 ac 2 a ;
Calculate the resistance of the negative pole of trouble spot and DC de-icing device
Wherein, in described fault distance computing module 430, the distance between described trouble spot and the negative pole of DC de-icing device
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.

Claims (6)

1. the fault distance-finding method under DC de-icing device ground wire deicing pattern, is characterized in that, comprising:
Obtain the cathode voltage absolute value U+ of fault moment DC de-icing device output, positive pole current absolute value I+, cathode voltage absolute value U-and cathodal current absolute value I-;
According to described cathode voltage absolute value U+, positive pole current absolute value I+, cathode voltage absolute value U-and cathodal current absolute value I-, calculate the resistance between the positive pole of trouble spot and DC de-icing device or negative pole, in order to avoid obscuring with positive and negative compute sign, with Id 1represent positive pole current absolute value I+, with Id 2represent cathodal current absolute value I-, circular is:
Calculate a=U +id 2, b=(2U ++ U -) Id 2-(2U -+ U +) Id 1and c=-U -id 1;
Calculate k = - b + b 2 - 4 ac 2 a ;
bit length resistance r, obtains the distance between the positive pole of trouble spot and DC de-icing device or negative pole.
2. the fault distance-finding method under DC de-icing device ground wire deicing pattern according to claim 1, is characterized in that, the distance between described trouble spot and the positive pole of DC de-icing device
3. the fault distance-finding method under DC de-icing device ground wire deicing pattern according to claim 1, is characterized in that, the distance between described trouble spot and the negative pole of DC de-icing device
4. the fault localization system under DC de-icing device ground wire deicing pattern, is characterized in that, comprising:
Parameter acquisition module, for obtaining cathode voltage absolute value U+ that fault moment DC de-icing device exports, positive pole current absolute value I+, cathode voltage absolute value U-and cathodal current absolute value I-;
Resistance calculations module, for according to described cathode voltage absolute value U+, positive pole current absolute value I+, cathode voltage absolute value U-and cathodal current absolute value I-, calculate the resistance between the positive pole of trouble spot and DC de-icing device or negative pole, in order to avoid obscuring with positive and negative compute sign, with Id 1represent positive pole current absolute value I+, with Id 2represent cathodal current absolute value I-, specifically for:
Calculate a=U +id 2, b=(2U ++ U -) Id 2-(2U -+ U +) Id 1and c=-U -id 1;
Calculate k = - b + b 2 - 4 ac 2 a ;
Calculate the resistance of the positive pole of trouble spot and DC de-icing device
Calculate the resistance of the negative pole of trouble spot and DC de-icing device
Fault distance computing module, for the resistance per unit length r according to described ground wire, obtains the distance between the positive pole of trouble spot and DC de-icing device or negative pole.
5. the fault localization system under DC de-icing device ground wire deicing pattern according to claim 4, is characterized in that, in described fault distance computing module, and the distance between described trouble spot and the positive pole of DC de-icing device l 1 = R 1 r .
6. the fault localization system under DC de-icing device ground wire deicing pattern according to claim 4, is characterized in that, in described fault distance computing module, and the distance between described trouble spot and the negative pole of DC de-icing device l 2 = R 2 r .
CN201310025842.8A 2013-01-23 2013-01-23 Fault distance-finding method under a kind of DC de-icing device ground wire deicing pattern and system Active CN103116114B (en)

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CN105467269A (en) * 2015-11-23 2016-04-06 中国南方电网有限责任公司超高压输电公司贵阳局 System and method for ground wire ice-melting fault localization of power transmission line

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3341485B2 (en) * 1994-09-29 2002-11-05 日新電機株式会社 Transmission line fault location method
CN101509949A (en) * 2009-03-20 2009-08-19 华南理工大学 Direct current transmission line double-end asynchronous and parameter self-adapting fault distance measuring time-domain method
CN101604833A (en) * 2009-06-05 2009-12-16 湖南省电力公司试验研究院 A kind of ground wire deicing device of use capable of being combined
CN101877470A (en) * 2010-03-30 2010-11-03 南方电网技术研究中心 Direct current thawing apparatus with special rectiformer and protection method thereof
CN102611061A (en) * 2012-03-13 2012-07-25 云南电力试验研究院（集团）有限公司电力研究院 Single-pole ground loop type direct-current deicing method for overhead ground wire and OPGW (optical fiber composite overhead ground wire)
CN102707190A (en) * 2012-01-10 2012-10-03 成都唐源电气有限责任公司 Direct-current-side short-circuit fault distance measuring device and method of metro tractive power supply system
CN102768325A (en) * 2012-06-26 2012-11-07 华北电力大学 Fault location method for low-current grounding system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0235379A (en) * 1988-07-25 1990-02-05 Fuji Electric Co Ltd Locating method of ground fault point
JP2000074978A (en) * 1998-08-31 2000-03-14 Nissin Electric Co Ltd Fault point locator at parallel two-line transmission line
KR100578451B1 (en) * 2004-08-25 2006-05-10 피앤씨테크 주식회사 A fault locating method and apparatus in electric railway system
KR101093030B1 (en) * 2010-09-13 2011-12-13 한국철도기술연구원 A fault location estimation technique using fault current ratio flowing catenary of the both sides between fault zone in ac feeding system and method

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3341485B2 (en) * 1994-09-29 2002-11-05 日新電機株式会社 Transmission line fault location method
CN101509949A (en) * 2009-03-20 2009-08-19 华南理工大学 Direct current transmission line double-end asynchronous and parameter self-adapting fault distance measuring time-domain method
CN101604833A (en) * 2009-06-05 2009-12-16 湖南省电力公司试验研究院 A kind of ground wire deicing device of use capable of being combined
CN101877470A (en) * 2010-03-30 2010-11-03 南方电网技术研究中心 Direct current thawing apparatus with special rectiformer and protection method thereof
CN102707190A (en) * 2012-01-10 2012-10-03 成都唐源电气有限责任公司 Direct-current-side short-circuit fault distance measuring device and method of metro tractive power supply system
CN102611061A (en) * 2012-03-13 2012-07-25 云南电力试验研究院（集团）有限公司电力研究院 Single-pole ground loop type direct-current deicing method for overhead ground wire and OPGW (optical fiber composite overhead ground wire)
CN102768325A (en) * 2012-06-26 2012-11-07 华北电力大学 Fault location method for low-current grounding system

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
直流电阻法在护层故障测试中的应用;刘领校;《中国优秀硕士学位论文全文数据库 工程科技II辑》;20100915(第9期);正文第13页倒数第3段-第14页第1段、第23页第1段-倒数第2段及图4-1、4-2 *
直流融冰运行模式下直流故障对交流保护的影响;卢志良等;《电力系统保护与控制》;20101016;第38卷(第20期);第172-175、178页 *

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