CN105510725B - The adaptive method of discrimination of high-voltage line voltage class - Google Patents
The adaptive method of discrimination of high-voltage line voltage class Download PDFInfo
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- CN105510725B CN105510725B CN201511000494.4A CN201511000494A CN105510725B CN 105510725 B CN105510725 B CN 105510725B CN 201511000494 A CN201511000494 A CN 201511000494A CN 105510725 B CN105510725 B CN 105510725B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/0807—Measuring electromagnetic field characteristics characterised by the application
- G01R29/0814—Field measurements related to measuring influence on or from apparatus, components or humans, e.g. in ESD, EMI, EMC, EMP testing, measuring radiation leakage; detecting presence of micro- or radiowave emitters; dosimetry; testing shielding; measurements related to lightning
- G01R29/0857—Dosimetry, i.e. measuring the time integral of radiation intensity; Level warning devices for personal safety use
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- General Physics & Mathematics (AREA)
- Electric Cable Installation (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention belongs to power transmission security fields, provide a kind of adaptive method of discrimination of high-voltage line voltage class, and often advance uses spacing distance μ first, records a sampled value, when forward travel distance is more than integration window length m μ, calculate integrated value ε in integration window；Then running integral window, often advance integration window sliding distance w μ, update an integrated value, and the size of more newest integrated value and its previous integrated value continues measurement updaue if newest integrated value is more than previous integrated value；If newest integrated value is less than its previous integrated value, assert that its previous integrated value is maximum integral value εmax；Finally by maximum integral value εmaxMaximum integral value corresponding with each voltage class that prestores in system is compared respectively, is found out and εmaxImmediate pre-stored values, corresponding voltage class regard as current voltage grade.The present invention can realize the adaptive differentiation to high-voltage line voltage class；Effective safety guarantee is provided for power worker's working environment.
Description
Technical field
The invention belongs to power transmission security fields, are related to a kind of neighbouring field distribution feature decision of utilization hv transmission line
The method of high-voltage line voltage class.
Background technology
With the high speed development of national economy, all trades and professions are increasing to the demand of electric power, supply power supply department
The quality requirement of electric power is also higher and higher, therefore the construction and service of power industry are particularly important；Safe and reliable electric power
It ensures social stability for reply and promotes economic development and have a very important significance.The safe and reliable operation of electric power facility is not from
The labour of power worker is opened, they often need to build, repair electric power facility, even in the case of equipment live；High pressure
Tape has very high voltage, and too close to the danger for having electric shock, but power worker is but in this danger often at work
Among danger.For the safety guarantee of power worker's construction, China has formulated stringent industry guideline and behavioral standard, but is applying
During work, the generation of accident still can be often caused because of carelessness.Due to different voltages grade high-voltage line minimum safe
Distance is different, so knowing that voltage class is to ensure the first step of power worker's safety, high voltage power transmission is realized from the level of technology
The automatic discrimination of line voltage grade is meaningful for improving construction safety.
Electric power source self generator, due to the limitation of generator insulating condition, the ceiling voltage of generator generally 22kV with
Under.In order to reduce the electric energy loss of transmission line of electricity, increase the distance of electrical energy transportation, the electricity that power plant is sent out is usually required by rising
Transmission system could be accessed after pressure.After power Transmission to power distribution station, and need to drop high-voltage electricity according to the classification of power consumer
It is pressed into different voltage and is conveyed to final power consumer；Power generation, transmission of electricity, the boosting of distribution, pressure reduction result in power transmission line
The voltage differences on road.Before 1949, China's electric power industry development is slow, and voltage class is various, there is 22/33/44/66/
The transmission line of electricity of the voltage class such as 110/154kV；As power industry construction is accelerated, China has gradually unified voltage class, passes through
After development for many years, the several voltage class of present 750/500/330/220/110/35/10/0.38kV are formd.
The danger of high voltage transmission line can be electrically shocked after being not only embodied in human body touching, more be to will not hit on when human body
When be possible to get an electric shock；So often all there are one minimum safe distance ranges for high-voltage line.Again due to different voltages grade
High-voltage line degree of danger is often different, and voltage class is higher, dangerous often also bigger, thus the safety of high-voltage line away from
From being different, such as following table：
Judge that human body is to have had exceeded safe distance to enter the voltage that the important criteria of danger zone one is exactly high-voltage line
Grade.First it is to be understood that the high-voltage line voltage class that worker faces when constructing, then could judge whether worker has the danger of electric shock
Danger.For above-mentioned background, this patent proposes a kind of adaptive method for differentiating high-voltage line voltage class.
Invention content
The purpose of the present invention is to provide a kind of adaptive method of discrimination of high-voltage line voltage class, this method utilizes high-voltage line
Neighbouring field distribution feature is realized by calculating to high voltage power transmission line voltage etc. according to the radiation power frequency electric field signal detected
The adaptive differentiation of grade.To achieve the above object, the technical solution adopted by the present invention is：
The adaptive method of discrimination of high-voltage line voltage class, includes the following steps：
Step 1. detects electric field strength, when electric field intensity value has been more than detection threshold τ, start recording；
Step 2. is often advanced sampling interval distance μ, and a sampled value is recorded, when forward travel distance is more than integration window length m μ
When, start to sum, obtains integrated value ε in integration window；
Step 3. running integral window, often advance integration window sliding distance w μ, update an integrated value, and more newest product
The size of score value and its previous integrated value continues measurement updaue if newest integrated value is more than previous integrated value；If most
New integrated value is less than its previous integrated value, then assert that its previous integrated value is maximum integral value εmax；
Step 4. is by step 3 gained maximum integral value εmaxMaximum integral value corresponding with each voltage class that prestores in system point
It is not compared, finds out and εmaxImmediate pre-stored values, corresponding voltage class regard as current voltage grade.
The beneficial effects of the present invention are：A kind of adaptive method of discrimination of high-voltage line voltage class is provided, this method utilizes
High-voltage line nearby according to the radiation power frequency electric field signal detected realized by calculating to high voltage transmission line by field distribution feature
The adaptive differentiation of voltage class；Effective safety guarantee is provided for power worker's working environment.
Description of the drawings
Fig. 1 is 220kV horizontal wiring high-voltage line ambient radiation electric-field intensity distribution figures.
Fig. 2 is 220kV quadripartion high-voltage line ambient radiation electric-field intensity distribution figures.
Fig. 3 is 110kV triangle wiring space electric field strengths and side conductor spacing relational graph.
Fig. 4 is that each voltage class triangle connects up high-voltage line surrounding electric field intensity and distance relation comparison diagram.
Fig. 5 is the adaptive method of discrimination block diagram of high-voltage line voltage class of the present invention.
Fig. 6 is to introduce electric-field intensity distribution curve under noise conditions.
Fig. 7, Fig. 8 are simulation performance curve.
Specific implementation mode
Invention is further described in detail with reference to the accompanying drawings and examples.
It is bright from the principle first：China's ultra-high-tension power transmission line is transmitted electricity using the alternating current of 50Hz, can be produced around power transmission line
The power frequency electromagnetic field of raw alternation；Magnetic field intensity discloses the size of electric current in transmission line of electricity, and electric field strength then reflects transmission of electricity
Voltage swing on circuit.It will produce induction field around high voltage transmission line, be 220kV solid conductor horizontal wirings as shown in Figure 1
Under the conditions of instantaneous electric field intensity distribution around power transmission line, the electric field around high-voltage line is each self-produced by three conducting wires as seen from the figure
Raw phase differ that 120 degree radiated electric fields are superimposed as a result, so having electric field strength very little at one among both threads wherein.Such as
Fig. 2 show 220kV conductors on quad bundled surrounding electric field intensity distributions, and compared with Fig. 1, surrounding electric field intensity is smaller, this
It is using place the reason of split conductor.Although it is strong to can be seen that various wirings mode high-voltage line surrounding electric field by Fig. 1, Fig. 2
Complex distribution and different is spent, but is essentially all as distance of wire is more and more remoter, electric field strength is also smaller and smaller.
Be illustrated in figure 3 under 110kV triangle wiring conditions intensity of radiation electric field with away from side conductor spacing relation curve, from figure
In as can be seen that high-voltage line intensity of radiation electric field exponentially decay with the increase away from side conductor spacing, by the ground of near side (ns) conducting wire
Square electric field intensity value can reach very big, but decay to the value of very little soon with the increase of distance.It is similar with 110kV, no
With voltage class high-voltage line surrounding electric field intensity value rule similar with distance all obediences, different voltages grade is provided as shown in Figure 4
High-voltage line surrounding electric field intensity is with to the relational graph of side conductor spacing, and as seen from the figure, different voltages grade is high at same position
Electric field strength may differ by more than 10 times under crimping, and with the increase of distance, and electric field strength decays rapidly.
Because electric-field intensity distribution difference is larger under different voltages grade high-voltage line, it is possible at a certain distance from
Electric field strength feature distinguishes the voltage class of high-voltage line, but this need accurately to know worker position to side conducting wire distance,
This is often not easy to realize in practice of construction.Therefore, the present invention declines according to transmission line of electricity surrounding electric field intensity with the increase of distance
Subtract violent characteristic, using human body by remote close power transmission line during the variation of electric field strength can be fairly obvious, propose a kind of
The adaptive method of discrimination of high-voltage line voltage class.
Worker is set in the present invention and is located at ground below high-voltage line, is advanced from remote location to high-voltage line direction, is often advanced
Sampling interval distance μ samples an electric field intensity value, then when it is from start position forward travel distance n μ, sampling obtains n electric field
Intensity value is denoted as E successively1,E2,…,En, and store spare；
Differentiate voltage class by the newest m electric field strength observed sum in an integration window
It arrives, integration window length is m μ, and integration window sliding distance is w μ：
As forward travel distance m μ, start to sum, obtains the 1st summing value
As forward travel distance (m+w) μ, the 2nd summing value is obtained
And so on, as forward travel distance (m+kw) μ, obtain+1 summing value of kth
Obtaining one group of summing value ε0,ε1,...,εkDuring, when occurring from some summing value εjStart to have occurred continuous
Decline, then it is assumed that εjFor maximum integral value；Q voltage class is obtained in the manner described above corresponds to maximum integral value
It is pre-stored in system.
In the present embodiment, high-voltage line voltage class adaptively differentiate procedural block diagram as shown in figure 5, the specific steps are：
Step 1. detects electric field strength, when electric field intensity value has been more than detection threshold τ, start recording；
Step 2. is often advanced sampling interval distance μ, and a sampled value is recorded, when forward travel distance is more than integration window length m μ
When, start to sum, obtains integrated value ε in integration window；It is as shown in Figure 6 that noise conditions Imitating electric field strength sampled value is added；
Step 3. running integral window, often advance integration window sliding distance w μ, update an integrated value, and more newest product
The size of score value and its previous integrated value continues measurement updaue if newest integrated value is more than previous integrated value；If most
New integrated value is less than its previous integrated value, then assert that its previous integrated value is maximum integral value εmax；
Step 4. is by step 3 gained maximum integral value εmaxMaximum integral value corresponding with each voltage class that prestores in systemIt is compared, finds out and ε respectivelymaxImmediate pre-stored valuesIts corresponding voltage class regards as current electricity
Press grade.
By εmaxRespectively withDifference is sought, obtaining one group of difference is：
Then the minimum value of this group of difference is searched：Dm=min (D1,D2,...Dq), then high-voltage line under preset test environment
Voltage class is pre-stored valuesCorresponding voltage class.
It is bent for the influence to various measurement errors and critical parameter to judgement accuracy in the present embodiment as shown in Figure 7, Figure 8
Line, wherein Fig. 7 is under 110kv, and fixed integration window length m μ are 3m, electric field strength under the conditions of different integration window sliding distance w μ
Influence of the measurement error to judgement accuracy；Fig. 8 is under 110kV, and fixed integration window length m μ are 3m, integration window sliding distance w μ
Identical value, and the performance under this value different condition are taken with sampling interval μ.It can be seen that working as integration window sliding distance w
μ and sampling interval μ takes 0.5m, integration window length m μ that can obtain preferable performance when being 3m.
The above description is merely a specific embodiment, any feature disclosed in this specification, except non-specifically
Narration, can be replaced by other alternative features that are equivalent or have similar purpose；Disclosed all features or all sides
Method or in the process the step of, other than mutually exclusive feature and/or step, can be combined in any way.
Claims (1)
1. the adaptive method of discrimination of high-voltage line voltage class, includes the following steps：
Step 1. detects electric field strength, when electric field intensity value has been more than detection threshold τ, start recording；
Step 2. is often advanced sampling interval distance μ, and a sampled value is recorded, and when forward travel distance is more than integration window length m μ, is opened
Begin to sum, obtains integrated value ε in integration window；
Step 3. running integral window, often advance integration window sliding distance w μ, update an integrated value, and more newest integrated value
Continue measurement updaue if newest integrated value is more than previous integrated value with the size of its previous integrated value；If newest
Integrated value is less than its previous integrated value, then assert that its previous integrated value is maximum integral value εmax；
Step 4. is by step 3 gained maximum integral value εmaxMaximum integral value corresponding with each voltage class that prestores in system respectively into
Row compares, and finds out and εmaxImmediate pre-stored values, corresponding voltage class regard as current voltage grade.
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| CN201511000494.4A CN105510725B (en) | 2015-12-28 | 2015-12-28 | The adaptive method of discrimination of high-voltage line voltage class |
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| CN201511000494.4A CN105510725B (en) | 2015-12-28 | 2015-12-28 | The adaptive method of discrimination of high-voltage line voltage class |
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| CN105510725A CN105510725A (en) | 2016-04-20 |
| CN105510725B true CN105510725B (en) | 2018-07-27 |
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| CN109521257B (en) * | 2019-01-30 | 2020-11-27 | 云南电网有限责任公司电力科学研究院 | Voltage grade identification system and method for high-voltage alternating current and direct current transmission line |
| CN111562447B (en) * | 2020-05-18 | 2022-07-15 | 国网江苏省电力有限公司无锡供电分公司 | System and method for identifying voltage class of high-voltage overhead transmission line |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101714748A (en) * | 2009-10-12 | 2010-05-26 | 中国电力科学研究院 | Method and system for determining serial and parallel connection gaps of overhead power transmission line insulators |
| CN202041588U (en) * | 2011-02-01 | 2011-11-16 | 重庆大学 | Ultra-high voltage DC transmission line total electric field strength on-line measuring instrument taking account of influence of wind speed, temperature and humidity |
| CN202720279U (en) * | 2012-05-17 | 2013-02-06 | 鞍山银宇电子科技有限公司 | Wireless digital electric field intensity monitoring sensor |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH11237420A (en) * | 1998-02-20 | 1999-08-31 | Matsushita Electric Ind Co Ltd | Radio-communication apparatus and method for measuring reception level of the apparatus |
| JP2012167966A (en) * | 2011-02-11 | 2012-09-06 | Sumitomo Electric Ind Ltd | Inspection method and inspection device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101714748A (en) * | 2009-10-12 | 2010-05-26 | 中国电力科学研究院 | Method and system for determining serial and parallel connection gaps of overhead power transmission line insulators |
| CN202041588U (en) * | 2011-02-01 | 2011-11-16 | 重庆大学 | Ultra-high voltage DC transmission line total electric field strength on-line measuring instrument taking account of influence of wind speed, temperature and humidity |
| CN202720279U (en) * | 2012-05-17 | 2013-02-06 | 鞍山银宇电子科技有限公司 | Wireless digital electric field intensity monitoring sensor |
Non-Patent Citations (1)
| Title |
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| 工频电场测量方法及安全警示***设计研究;刘聪汉;《中国优秀硕士学位论文全文数据库》;20130315;第9-28页 * |
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