CN107907752A - The localization method of region direct-current ground potential fluctuation sources - Google Patents
The localization method of region direct-current ground potential fluctuation sources Download PDFInfo
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- CN107907752A CN107907752A CN201710868921.3A CN201710868921A CN107907752A CN 107907752 A CN107907752 A CN 107907752A CN 201710868921 A CN201710868921 A CN 201710868921A CN 107907752 A CN107907752 A CN 107907752A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
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Abstract
The present invention relates to T ＆ D Technology field, discloses a kind of localization method of region direct-current ground potential fluctuation sources, comprises the following steps：Establish substation grounding neutral point direct current monitoring network, obtain the DC current size and Orientation of grounded neutral, exploitation direct current distribution software for calculation based on the transformer dc current monitoring data under the method for operation are returned by the direct current transportation the earth in monitoring network, software for calculation is distributed by direct current and deduces the distribution of substation grounding neutral point direct current and the DC current size and Orientation contrast of the grounded neutral obtained with monitoring network, obtains position and the size of current of fluctuation sources.The localization method of direct-current ground potential fluctuation sources in region of the present invention utilizes existing regional exchange electricity grid substation system, is accurately positioned ground electric potential fluctuation source, without separately detection detection website, considerably reduces testing cost.
Description
Technical field
The present invention relates to T ＆ D Technology field, and in particular to a kind of localization method of region direct-current ground potential fluctuation sources.
Background technology
Nearest multinomial research finds that magnetic storm, high-altitude nuclear detonation, urban track traffic, DC transmission system monopole the earth are transported
The activity such as row can cause the obvious fluctuation of a wide range of surface potential, so that on the transformer neutral point of electric system ground connection operation
Produce the very low frequency electric current that DC current is either similar to DC current.This electric current not only jeopardizes the safety fortune of AC network
OK, can also numerous adverse effects be produced to underground metal pipes and industrial electricity apparatus, not only results in ground potential fluctuation sources
Electric system and the irregular working of underground metalliferous pipe network system, earthquake monitoring stations and networks wrong report in the neighbourhood, can also produce one
Serial chain reaction, causes great security incident and economic loss, huge negative effect is brought to modern society.
Power transmission network can be in electric system due to its wide geographical distribution and lowohmic network characteristic, ground electric potential fluctuation
Characteristic current distribution is produced, so power transmission network is a monitoring network that can find ground electric potential fluctuation well, state at present
The characteristic current distribution that internal and external pin returns to direct current transportation the earth under the method for operation in AC system has carried out substantial amounts of research, but
These researchs belong to the research of direct ideation, i.e., the fluctuation of ground potential are calculated in the case of known to fluctuation sources, so as to calculate electricity
DC current distribution in Force system, can not position ground electric potential fluctuation source.
The content of the invention
A kind of deficiency of the purpose of the present invention aiming at above-mentioned technology, there is provided positioning of region direct-current ground potential fluctuation sources
Method, can tentatively judge fluctuation sources position and direction by monitoring transformer neutral point electric current, then is distributed and calculated by direct current
Software deduces the specific location and size of current of fluctuation sources.
To achieve the above object, the localization method of the region direct-current ground potential fluctuation sources designed by the present invention, including it is following
Step：
A regional exchange electricity grid substation grounded neutral direct current monitoring network) is established, obtains the monitoring of grounded neutral direct current
The DC current size and Orientation of all grounded neutrals in network；
B) in the step A) establish grounded neutral direct current monitoring network in, take grounded neutral direct current monitoring network
The grounded neutral DC current direction of Zhong Ge edge placements substation is each in grounded neutral direct current monitoring network for fluctuation sources
The current direction of edge placement；
C) inwardly take substation grounding neutral point direct current electric successively from each edge placement of grounded neutral direct current monitoring network
Direction is flowed, until the substation grounding neutral point direct current direction taken and corresponding grounded neutral direct current monitoring network
Edge placement is in the step B) in obtain fluctuation sources current direction on the contrary, the substation region then taken for fluctuation source region
Domain；
D) according to the step A) in direct current transportation the earth in grounded neutral direct current monitoring network return to the method for operation
Under transformer dc current monitoring data, with reference to network DC current parameters and ground resistivity parameter, exploitation direct current distribution
Software for calculation；
E) combine substation's geographical location information, utilize the step D) in exploitation direct current distribution software for calculation, in institute
State step C) in determine fluctuation source region in be randomly provided fluctuation source position, by direct current be distributed software for calculation calculate power transformation
Stand the distribution of grounded neutral DC current, by the substation grounding neutral point direct current calculated distribution and the step A)
The DC current direction of all grounded neutrals contrasts in the grounded neutral direct current monitoring network of middle acquirement, by adjusting with
The position of machine fluctuation sources, until calculate substation grounding neutral point direct current distribution DC current direction with it is described
Step A) in obtain grounded neutral direct current monitoring network in all grounded neutrals DC current direction it is identical, that is, determine
The position in the random fluctuation source is the position of the fluctuation sources actually occurred；
F) in the step E) increase and decrease fluctuation sources size of current on definite fluctuation source position, calculated by direct current distribution soft
Part calculates the distribution of substation grounding neutral point direct current, and the substation grounding neutral point direct current calculated is distributed
With the step A) in the grounded neutral direct current monitoring network that obtains the DC current size of all grounded neutrals do pair
Than, to calculate substation grounding neutral point direct current distribution in DC current size with the step A) in obtain
Grounded neutral direct current monitoring network in all grounded neutrals DC current Size Error be less than 0.1% when, that is, determine
The size of current of the fluctuation sources is the size of current of the fluctuation sources actually occurred.
Preferably, the step D) in, the direct current distribution software for calculation is included in regional exchange power grid by node and branch
The DC current distributed model of road composition, the direct current distribution software for calculation combination field circuit method model foundation fluctuation sources and direct current
The relation of CURRENT DISTRIBUTION.
Preferably, the step D) in, the direct current distribution software for calculation will fluctuate source region and carry out mesh generation.
Preferably, the step E) in, fluctuation source position is gradually set in each grid, is calculated.
Compared with prior art, the present invention has the following advantages：
1st, the present invention is using power transmission network geographical distribution is wide, ground network resistor is low compared with electric resistance of soil and arbitrarily electric
Position fluctuation sources the characteristics of can producing characteristic current inside electric system, more easily realize the monitoring to the fluctuation of place position with
Positioning；
2nd, using power system network parameter and soil parameters, ground electric potential fluctuation source and substation grounding are established in theory
Relation mutually is pushed away between neutral point current, realizes that fluctuation sources are accurately positioned, and is verified in direct current distribution software, ensure that positioning
Accuracy；
3rd, the present invention utilizes existing regional exchange electricity grid substation system, is accurately positioned ground electric potential fluctuation source, Wu Xuling
Row detection detection website, considerably reduces testing cost.
Embodiment
With reference to specific embodiment, the present invention is described in further detail.
The localization method of direct-current ground potential fluctuation sources in region of the present invention, comprises the following steps：
A) according to the specific longitude and latitude in somewhere, regional exchange electricity grid substation grounded neutral direct current monitoring network is established, and
The DC current size and Orientation of all grounded neutrals in grounded neutral direct current monitoring network is obtained, region in the present embodiment
AC network substation grounding neutral point direct current monitoring network includes following 16 substations；
B) in step A) in the grounded neutral direct current monitoring network established, take in grounded neutral direct current monitoring network each
The grounded neutral DC current direction of edge placement substation is fluctuation sources at each edge of grounded neutral direct current monitoring network
The current direction of position；
C) inwardly take substation grounding neutral point direct current electric successively from each edge placement of grounded neutral direct current monitoring network
Direction is flowed, until the substation grounding neutral point direct current direction taken and corresponding grounded neutral direct current monitoring network
Edge placement is in step B) in obtain fluctuation sources current direction on the contrary, the substation region then taken for fluctuation source region；This
No. 15 substation regions are fluctuation source region in embodiment；
D) according to step A) in direct current transportation the earth in grounded neutral direct current monitoring network return under the method for operation
Transformer dc current monitoring data, with reference to network DC current parameters and ground resistivity parameter, exploitation direct current distribution calculates
Software, direct current distribution software for calculation will fluctuate source region and carry out mesh generation, and by node and branch in inclusion region AC network
The DC current distributed model of road composition, direct current distribution software for calculation combination field circuit method model foundation fluctuation sources and DC current
The relation of distribution；
E) combine substation's geographical location information, utilize step D) in exploitation direct current distribution software for calculation, in step C)
In determine fluctuation source region in each grid gradually set fluctuation source position, by direct current be distributed software for calculation calculate
The distribution of substation grounding neutral point direct current, by the substation grounding neutral point direct current calculated distribution and step A)
The DC current direction of all grounded neutrals contrasts in the grounded neutral direct current monitoring network of middle acquirement, by adjusting with
The position of machine fluctuation sources, until the DC current direction of the substation grounding neutral point direct current distribution calculated is and step
A the DC current direction of all grounded neutrals is identical in the grounded neutral direct current monitoring network obtained in), that is, determining should be with
The position of machine fluctuation sources is the position of the fluctuation sources actually occurred；The present embodiment result of calculation is 121.5019 ° of latitudes of longitude
30.9699°；
F) in step E) increase and decrease fluctuation sources size of current on definite fluctuation source position, pass through direct current and be distributed software for calculation meter
The distribution of substation grounding neutral point direct current is calculated, the substation grounding neutral point direct current calculated is distributed and walked
Rapid A) in the grounded neutral direct current monitoring network that obtains the DC current sizes of all grounded neutrals contrast, to calculating
Go out substation grounding neutral point direct current distribution in DC current size with step A) in obtain grounded neutral
When the DC current Size Error of all grounded neutrals is less than 0.1% in direct current monitoring network, that is, determine the electricity of the fluctuation sources
Stream size is the size of current of the fluctuation sources actually occurred, and the result of calculation in the present embodiment is 3002.5A.
The result being calculated is compareed with actual parameter, data match, such as following table：
The localization method of direct-current ground potential fluctuation sources in region of the present invention utilizes existing regional exchange electricity grid substation system,
Ground electric potential fluctuation source is accurately positioned, without separately detection detection website, considerably reduces testing cost, and utilize electric system
Network parameter and soil parameters, establish between ground electric potential fluctuation source and substation grounding neutral point current and mutually push away pass in theory
System, realizes that fluctuation sources are accurately positioned, and is verified in direct current distribution software, ensure that the accuracy of positioning.
Claims (4)
1. a kind of localization method of region direct-current ground potential fluctuation sources, it is characterised in that comprise the following steps：
A regional exchange electricity grid substation grounded neutral direct current monitoring network) is established, obtains grounded neutral direct current monitoring network
In all grounded neutrals DC current size and Orientation；
B) in the step A) in the grounded neutral direct current monitoring network established, take in grounded neutral direct current monitoring network each
The grounded neutral DC current direction of edge placement substation is fluctuation sources at each edge of grounded neutral direct current monitoring network
The current direction of position；
C) substation grounding neutral point direct current side is inwardly taken successively from each edge placement of grounded neutral direct current monitoring network
To until the substation grounding neutral point direct current direction taken and corresponding grounded neutral direct current monitoring network edge
Position is in the step B) in obtain fluctuation sources current direction on the contrary, the substation region then taken for fluctuation source region；
D) according to the step A) in direct current transportation the earth in grounded neutral direct current monitoring network return under the method for operation
Transformer dc current monitoring data, with reference to network DC current parameters and ground resistivity parameter, exploitation direct current distribution calculates
Software；
E) combine substation's geographical location information, utilize the step D) in exploitation direct current distribution software for calculation, in the step
Rapid C) in be randomly provided fluctuation source position in the fluctuation source region that determines, being distributed software for calculation by direct current calculates substation and connects
The distribution of ground neutral point direct current, by the substation grounding neutral point direct current calculated distribution and the step A) in take
The DC current direction of all grounded neutrals contrasts in the grounded neutral direct current monitoring network obtained, by adjusting random wave
The position in dynamic source, until the DC current direction of the substation grounding neutral point direct current distribution calculated with the step
A the DC current direction of all grounded neutrals is identical in the grounded neutral direct current monitoring network obtained in), that is, determining should be with
The position of machine fluctuation sources is the position of the fluctuation sources actually occurred；
F) in the step E) increase and decrease fluctuation sources size of current on definite fluctuation source position, pass through direct current and be distributed software for calculation meter
The distribution of substation grounding neutral point direct current is calculated, by the substation grounding neutral point direct current calculated distribution and institute
State step A) in the grounded neutral direct current monitoring network that obtains the DC current sizes of all grounded neutrals contrast, extremely
Calculate substation grounding neutral point direct current distribution in DC current size with the step A) in obtain connect
When the DC current Size Error of all grounded neutrals is less than 0.1% in ground neutral point direct current monitoring network, that is, determine the ripple
The size of current in dynamic source is the size of current of the fluctuation sources actually occurred.
2. the localization method of region direct-current ground potential fluctuation sources according to claim 1, it is characterised in that：The step D)
In, the direct current distribution software for calculation includes the DC current distributed model being made of in regional exchange power grid node and branch,
The direct current distribution software for calculation combination field circuit method model foundation fluctuation sources and the relation of DC current distribution.
3. the localization method of region direct-current ground potential fluctuation sources according to claim 1, it is characterised in that：The step D)
In, the direct current distribution software for calculation will fluctuate source region and carry out mesh generation.
4. the localization method of region direct-current ground potential fluctuation sources according to claim 3, it is characterised in that：The step E)
In, fluctuation source position is gradually set in each grid, is calculated.
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| CN201710868921.3A CN107907752B (en) | 2017-09-22 | 2017-09-22 | Method for positioning regional direct current ground potential fluctuation source |
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| CN102033151A (en) * | 2009-09-25 | 2011-04-27 | 华东电力试验研究院有限公司 | System and method for monitoring direct-current ground potential |
| CN102778634A (en) * | 2012-07-11 | 2012-11-14 | 福建省电力有限公司电力科学研究院 | Distribution network voltage fluctuation positioning method and device |
| US20160054363A1 (en) * | 2014-08-19 | 2016-02-25 | Southern States, Llc | Corona avoidance electric power line monitoring, communication and response system |
| CN105738772A (en) * | 2016-04-18 | 2016-07-06 | 东南大学 | Compulsory disturbance source positioning method based on power and frequency fluctuation phase |
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2017
- 2017-09-22 CN CN201710868921.3A patent/CN107907752B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7598625B2 (en) * | 2007-06-08 | 2009-10-06 | Honeywell International Inc. | Network-based aircraft secondary electric power distribution system |
| CN101267116A (en) * | 2008-03-20 | 2008-09-17 | 浙江工业大学 | An automatic method for power quality interference source of distribution grid |
| CN102033151A (en) * | 2009-09-25 | 2011-04-27 | 华东电力试验研究院有限公司 | System and method for monitoring direct-current ground potential |
| CN102778634A (en) * | 2012-07-11 | 2012-11-14 | 福建省电力有限公司电力科学研究院 | Distribution network voltage fluctuation positioning method and device |
| US20160054363A1 (en) * | 2014-08-19 | 2016-02-25 | Southern States, Llc | Corona avoidance electric power line monitoring, communication and response system |
| CN105738772A (en) * | 2016-04-18 | 2016-07-06 | 东南大学 | Compulsory disturbance source positioning method based on power and frequency fluctuation phase |
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