CN103453942A - Method for measuring power frequency electric field intensity and magnetic field intensity which are in contact with operating worker in 500kV transformer substation - Google Patents
Method for measuring power frequency electric field intensity and magnetic field intensity which are in contact with operating worker in 500kV transformer substation Download PDFInfo
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- CN103453942A CN103453942A CN2013104181891A CN201310418189A CN103453942A CN 103453942 A CN103453942 A CN 103453942A CN 2013104181891 A CN2013104181891 A CN 2013104181891A CN 201310418189 A CN201310418189 A CN 201310418189A CN 103453942 A CN103453942 A CN 103453942A
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Abstract
The invention relates to a method for measuring power frequency electric field intensity and magnetic field intensity which are in contact with an operating worker in a 500kV transformer substation. The level of the power frequency electric field intensity and the magnetic field intensity which are in contact with the operating worker in the transformer substation can be really reflected. The method comprises the specific steps of B, recording the inspection times N of the operating worker within a shift; B, conforming an inspection route of the operating worker, a total distance L of the inspection route for one time and inspection points where the operating worker is required to stay; C, recording time distribution on the inspection route of the operating worker for one time; D, performing point distribution on the inspection route and detecting the power frequency electric field intensity at the point distribution positions; E, detecting the power frequency electric field intensity and the magnetic field intensity at the positions of the inspection points required to stay; F, confirming the staying time T in a control room and detecting the power frequency electric field intensity and the magnetic field intensity in the control room; G, calculating and analyzing the power frequency electric field intensity and the magnetic field intensity which are in contact with the operating worker to obtain the level of the power frequency electric field intensity and the magnetic field intensity which are in contact with the operating worker in the transformer substation.
Description
Technical field:
The present invention relates to the measuring method of a kind of power frequency electric field, power frequency magnetic field intensity, specifically a kind of 500kV of measurement substation operation personnel contact the method for power frequency electric field, magnetic field intensity.
Background technology:
Research shows, power frequency electric field, power frequency magnetic field are of short duration effects on the impact of human body, and do not have cumulative function.Power frequency electric field, power frequency magnetic field be transformer station exist may produce to human body the principal element of harm, but it is few to contact the research of power frequency electric field, power frequency magnetic field intensity about the operations staff.
At present, " workplace harmful factors Exposed limit value part 2: physics adverse factor " (GBZ2.2-2007) stipulated, the exposure limit of power frequency electric field is 5kVm, " power industry work situation Specifications of Monitoring Technology " (DL/T799-2010) stipulated, the exposure limit of power frequency magnetic field is 0.5mT.
500kV substation operation personnel contact power frequency electric field, power frequency magnetic field in daily substation inspection.At present, lack the measuring method that the substation operation personnel is contacted to power frequency electric field, power frequency magnetic field intensity.
Summary of the invention:
The present invention is for overcoming above-mentioned the deficiencies in the prior art, provide a kind of measurement 500kV substation operation personnel to contact power frequency electric field, the method of magnetic field intensity, it can effectively measure power frequency electric field, magnetic field intensity, thereby reflect that the most really the substation operation personnel contact power frequency electric field, the level of power frequency magnetic field intensity, can clear and definite substation operation personnel contacting power frequency electric field and power frequency magnetic field intensity exceeds standard activity duration of setting, and can be clear and definite operations staff's contact exceed standard particular location and the duration of contact of setting, thereby can adjust operating personnel's patrol route or adjust its activity duration for next step reference frame is provided.
For achieving the above object, the objective of the invention is to adopt following technical proposals to realize:
A kind of 500kV of measurement substation operation personnel contact the method for power frequency electric field, magnetic field intensity, and concrete steps are:
A records the times N that the operations staff makes an inspection tour in a shift;
B determines patrol route, the total distance L of single patrol route when the operations staff makes an inspection tour
alwaysand each inspection point provided that needs stop;
When C records the tour of operations staff's single, the time on patrol route distributes;
D is layouted for patrol route, and detects power-frequency electric field strength and the magnetic field intensity at the place that layouts;
E detects power-frequency electric field strength and the magnetic field intensity at the inspection point provided place stopped;
F determines at the residence time of pulpit T
control, power-frequency electric field strength and the magnetic field intensity of detection pulpit;
The operating personnel is contacted to power-frequency electric field strength to G and magnetic field intensity is carried out computational analysis, show that the substation operation personnel contact the level of power frequency electric field, power frequency magnetic field intensity.
The detailed process of described step C is:
The tour time T that C1 investigation single is maked an inspection tour
patrol;
The C2 investigation is at the residence time of each inspection point provided T
point is total=t
1+ t
2+ ... t
n, t
nbe illustrated in the residence time of n inspection point provided;
The walk about time of C3 on the patrol route except inspection point provided is T
route, T
route=T
patrol-T
point is total.
The detailed process of described step D is:
Layouted according to the same manner between each two adjacent inspection point provideds of D1, first the mid point of two adjacent inspection point provided spacings is labeled as to No. 1 and layouts;
D2 then No. 1 is layouted and adjacent inspection point provided between the mid point of distance be labeled as respectively No. 2 and layout;
D3 is labeled as respectively No. 3 by two mid points of layouting for No. 2 with adjacent separately inspection point provided and No. 1 cloth dot spacing respectively again and layouts;
Two of D4, two consecutive point of layouting for No. 3 separately are inspection point provided and layout for No. 2 and layout for No. 1 and layout for No. 2, then select respectively all layout for No. 3 and its each consecutive point between the mid point of distance be labeled as No. 4 and layout;
D5 proceeds to select according to mentioned above principle, until institute layouts and consecutive point between apart from being no more than 1m;
D6 detects above-mentioned power-frequency electric field strength of respectively layouting and magnetic field intensity;
If D7 layouts, the power-frequency electric field strength at place surpasses 5kV/m, and the testing result of consecutive point surpasses above-mentioned value, need to according to aforementioned principle select the place of layouting and consecutive point place apart from mid point, continued to layout, and the detection power-frequency electric field strength of layouting; If the testing result of this point still surpasses above-mentioned value, continue to layout, until the testing result of layouting is less than above-mentioned value;
Limit value for power frequency magnetic field intensity is 0.5mT, and all the other are identical with the cloth point process of power-frequency electric field strength.
The detailed process of described step G is:
G1 adds up power-frequency electric field strength and the power frequency magnetic field intensity of each inspection point provided, and power-frequency electric field strength can draw over all inspection point provideds of 5kV/m and the tour time sum of above-mentioned inspection point provided, uses T
electric field, point is supermean;
Power frequency magnetic field intensity surpasses all inspection point provideds of 0.5mT and the tour time sum of above-mentioned inspection point provided can draw, uses T
magnetic field, point is supermean;
The power-frequency electric field strength of layouting on the G2 patrol route surpasses layouting to add up and drawing of 5kV/m, this type of layout at least 3 adjacent and can connect into line segment, add up two distances between layouting that each line segment is adjacent, with Ln, mean; The summation of two distances of layouting that all line segments are adjacent is
The power frequency magnetic field intensity of layouting on patrol route surpasses layouting to add up and drawing of 0.5mT, this type of layout at least 3 adjacent and can connect into line segment, add up two distances between layouting that each line segment is adjacent, with Dn, mean; The summation of two distances of layouting that all line segments are adjacent is
Total distance of G3 investigation patrol route is L
always, the speed of walking about on the patrol route except inspection point provided is L
always/ T
route;
G4 contacts the time sum that surpasses 5kV/m on patrol route
On patrol route, the power frequency magnetic field intensity contact over the time sum of 0.5mT is
In the tour of G5 single, the contact power-frequency electric field strength is T over the time of 5kV/m
electric field, singly patrol super=T
electric field, point is super+ T
electric field, line is super;
In the single tour, the contact power frequency magnetic field intensity is T over the time of 0.5mT
magnetic field, singly patrol super=T
magnetic field, point is super+ T
magnetic field, line is super;
The time that in the single shift of G6, in all tour processes, the contact power-frequency electric field strength surpasses 5kV/m is T
electric field, patrol super=N * T
electricity , singly patrol super;
The time that in single shift, in all tour processes, the contact power frequency magnetic field intensity surpasses 0.5mT is T
magnetic field, patrol super=N * T
magnetic , singly patrol super;
G7 finally calculates, if the power-frequency electric field strength of pulpit surpasses 5kV/m, in single shift the operating personnel to contact the time that power-frequency electric field strength surpasses 5kV/m be T
electric field, patrol super+ T
control; If the power-frequency electric field strength of pulpit surpasses 5kV/m, in single shift the operating personnel to contact the time that power-frequency electric field strength surpasses 5kV/m be T
electric field, patrol super;
If the power frequency magnetic field intensity of pulpit surpasses 0.5mT, in single shift the operating personnel to contact the time that power frequency magnetic field intensity surpasses 0.5mT be T magnetic field, patrol super+T control; If the power frequency magnetic field intensity of pulpit surpasses 0.5mT, in single shift the operating personnel to contact the time that power frequency magnetic field intensity surpasses 0.5mT be T
magnetic field, patrol super.
The invention has the beneficial effects as follows, the present invention can reflect that the substation operation personnel contact the level of power frequency electric field, power frequency magnetic field intensity the most really, can clear and definite substation operation personnel contacting power frequency electric field and power frequency magnetic field intensity exceeds standard activity duration of setting, and can be clear and definite operations staff's contact exceed standard particular location and the duration of contact of setting, provide reference frame thereby can adjust operating personnel's patrol route or adjust its activity duration for next step.
Embodiment:
Below in conjunction with embodiment, the present invention is further described.
A kind ofly assess the substation operation personnel to contact the method for power-frequency electric field strength as follows:
1. shift of certain 500kV operations staff is 2 days 48 hours, in a shift, makes an inspection tour altogether 6 times.
2. the total distance of operations staff's tour is 1020 meters, and needing the inspection point provided stopped is 69, comprising: #1 bus (CVT), mother I, #1 station with becoming, #2B is low anti-etc.
3., when operations staff's single is maked an inspection tour, always make an inspection tour time T
patrolbe 70 minutes, the residence time of inspection point provided is 50 minutes, and the time of walking about of patrol route is 20 minutes.
4. power-frequency electric field strength surpasses totally 7 of the inspection point provideds of 5kV/m, and the residence time is 5 minutes altogether.
5. what on patrol route, power-frequency electric field strength surpassed 5kV/m layouts totally 80, and what all line segments of a formation that respectively exceeds standard were adjacent two layouts that to gather apart from sum be 120 meters.
6. the electric field intensity of pulpit is 4.063V/m.
7. therefore, T
electric field, point is super=5 minutes, T
electric field, line is super=120/ (1020/20)=2.4 minute, T
electric field, singly patrol super=T
electric field, point is super+ T
electricity , line is super=5+2.4=7.4 minute, T
electric field, patrol super=N * T
electric field, singly patrol super=6 * 7.4=44.4 minute.
8. final statistics draws, in shift of operations staff 2 days 48 hours, has 44.4 minutes contact power-frequency electric field strengths and surpasses 5kV/m.
A kind ofly assess the substation operation personnel to contact the method for power frequency magnetic field intensity as follows:
1. shift of certain 500kV operations staff is 2 days 48 hours, in a shift, makes an inspection tour altogether 6 times.
2. the total distance of operations staff's tour is 1020 meters, and needing the inspection point provided stopped is 69, comprising: #1 bus (CVT), mother I, #1 station with becoming, #2B is low anti-etc.
3., when operations staff's single is maked an inspection tour, always make an inspection tour time T
patrolbe 70 minutes, the residence time of inspection point provided is 50 minutes, and the time of walking about of patrol route is 20 minutes.
4. power frequency magnetic field intensity surpasses totally 2 of the inspection point provideds of 0.5mT, and the residence time is 1.5 minutes altogether.
5. what on patrol route, power frequency magnetic field intensity surpassed 0.5mT layouts totally 10, and what all line segments of a formation that respectively exceeds standard were adjacent two layouts that to gather apart from sum be 15 meters.
6. the magnetic field intensity of pulpit is 0.111 * 10
-3mT.
7. therefore, T
magnetic field, point is super=1.5 minutes, T
magnetic field, line is super=15/ (1020/20)=0.3 minute, T
magnetic field, singly patrol super=T
magnetic field, point is super+ T
magnetic field, line is super=1.5+0.3=1.8 minute, T
magnetic field, patrol super=N * T
magnetic field, singly patrol super=6 * 1.8=10.8 minute.
8. final statistics draws, in shift of operations staff 2 days 48 hours, has 10.8 minutes contact power frequency magnetic field intensities and surpasses 0.5mT.
Claims (4)
1. measure the method that 500kV substation operation personnel contact power frequency electric field, magnetic field intensity for one kind, it is characterized in that, concrete steps are:
A records the times N that the operations staff makes an inspection tour in a shift;
B determines patrol route, the total distance L of single patrol route when the operations staff makes an inspection tour
alwaysand each inspection point provided that needs stop;
When C records the tour of operations staff's single, the time on patrol route distributes;
D is layouted for patrol route, and detects the power-frequency electric field strength at the place that layouts;
E detects power-frequency electric field strength and the magnetic field intensity at the inspection point provided place stopped;
F determines at the residence time of pulpit T
control, power-frequency electric field strength and the magnetic field intensity of detection pulpit;
The operating personnel is contacted to power-frequency electric field strength to G and magnetic field intensity is carried out computational analysis, show that the substation operation personnel contact the level of power frequency electric field, power frequency magnetic field intensity.
2. measurement 500kV substation operation personnel as claimed in claim 1 contact the method for power frequency electric field, magnetic field intensity, it is characterized in that, the detailed process of described step C is:
The tour time T that C1 investigation single is maked an inspection tour
patrol;
The C2 investigation is at the residence time of each inspection point provided T
point is total=t
1+ t
2+ ... t
n, t
nbe illustrated in the residence time of n inspection point provided;
The walk about time of C3 on the patrol route except inspection point provided is T
route, T
route=T
patrol-T
point is total.
3. measurement 500kV substation operation personnel as claimed in claim 1 contact the method for power frequency electric field, magnetic field intensity, it is characterized in that, the detailed process of described step D is:
Layouted according to the same manner between each two adjacent inspection point provideds of D1, first the mid point of two adjacent inspection point provided spacings is labeled as to No. 1 and layouts;
D2 then No. 1 is layouted and adjacent inspection point provided between the mid point of distance be labeled as respectively No. 2 and layout;
D3 is labeled as respectively No. 3 by two mid points of layouting for No. 2 with adjacent separately inspection point provided and No. 1 cloth dot spacing respectively again and layouts;
Two of D4, two consecutive point of layouting for No. 3 separately are inspection point provided and layout for No. 2 and layout for No. 1 and layout for No. 2, then select respectively all layout for No. 3 and its each consecutive point between the mid point of distance be labeled as No. 4 and layout;
D5 proceeds to select according to mentioned above principle, until institute layouts and consecutive point between apart from being no more than 1m;
D6 detects above-mentioned power-frequency electric field strength of respectively layouting and magnetic field intensity;
If D7 layouts, the power-frequency electric field strength at place surpasses 5kV/m, and the testing result of consecutive point surpasses above-mentioned value, need to according to aforementioned principle select the place of layouting and consecutive point place apart from mid point, continued to layout, and the detection power-frequency electric field strength of layouting; If the testing result of this point still surpasses above-mentioned value, continue to layout, until the testing result of layouting is less than above-mentioned value;
Limit value for power frequency magnetic field intensity is 0.5mT, and all the other are identical with the cloth point process of power-frequency electric field strength.
4. measurement 500kV substation operation personnel as claimed in claim 1 contact the method for power frequency electric field, magnetic field intensity, it is characterized in that, the detailed process of described step G is:
G1 adds up power-frequency electric field strength and the power frequency magnetic field intensity of each inspection point provided, and power-frequency electric field strength can draw over all inspection point provideds of 5kV/m and the tour time sum of above-mentioned inspection point provided, uses T
electric field, point is supermean;
Power frequency magnetic field intensity surpasses all inspection point provideds of 0.5mT and the tour time sum of above-mentioned inspection point provided can draw, uses T
magnetic field, point is supermean;
The power-frequency electric field strength of layouting on the G2 patrol route surpasses layouting to add up and drawing of 5kV/m, this type of layout at least 3 adjacent and can connect into line segment, add up two distances between layouting that each line segment is adjacent, with Ln, mean; The summation of two distances of layouting that all line segments are adjacent is
The power frequency magnetic field intensity of layouting on patrol route surpasses layouting to add up and drawing of 0.5mT, this type of layout at least 3 adjacent and can connect into line segment, add up two distances between layouting that each line segment is adjacent, with Dn, mean; The summation of two distances of layouting that all line segments are adjacent is
Total distance of G3 investigation patrol route is L
always, the speed of walking about on the patrol route except inspection point provided is L
always/ T
route;
G4 contacts the time sum that surpasses 5kV/m on patrol route
On patrol route, the power frequency magnetic field intensity contact over the time sum of 0.5mT is
In the tour of G5 single, the contact power-frequency electric field strength is T over the time of 5kV/m
electric field, singly patrol super=T
electric field, point is super+ T
electric field, line is super;
In the single tour, the contact power frequency magnetic field intensity is T over the time of 0.5mT
magnetic field, singly patrol super=T
magnetic field, point is super+ T
magnetic field, line is super;
The time that in the single shift of G6, in all tour processes, the contact power-frequency electric field strength surpasses 5kV/m is T
electric field, patrol super=N * T
electricity , singly patrol super;
The time that in single shift, in all tour processes, the contact power frequency magnetic field intensity surpasses 0.5mT is T
magnetic field, patrol super=N * T
magnetic , singly patrol super;
G7 finally calculates, if the power-frequency electric field strength of pulpit surpasses 5kV/m, in single shift the operating personnel to contact the time that power-frequency electric field strength surpasses 5kV/m be T
electric field, patrol super+ T
control; If the power-frequency electric field strength of pulpit surpasses 5kV/m, in single shift the operating personnel to contact the time that power-frequency electric field strength surpasses 5kV/m be T
electric field, patrol super;
If the power frequency magnetic field intensity of pulpit surpasses 0.5mT, in single shift the operating personnel to contact the time that power frequency magnetic field intensity surpasses 0.5mT be T
magnetic field, patrol super+ T
control; If the power frequency magnetic field intensity of pulpit surpasses 0.5mT, in single shift the operating personnel to contact the time that power frequency magnetic field intensity surpasses 0.5mT be T
magnetic field, patrol super.
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| CN103760427A (en) * | 2014-01-15 | 2014-04-30 | 国家电网公司 | Statistical method of power frequency electromagnetic field distribution rules in transformer substation |
| CN103810355A (en) * | 2014-03-12 | 2014-05-21 | 国家电网公司 | Power frequency electric field three-dimensional analysis method for high voltage switching field of substation |
| CN104134172A (en) * | 2014-08-20 | 2014-11-05 | 国网上海市电力公司 | Method for estimating average level of long-term magnetic field exposure of households |
| CN111812414A (en) * | 2020-07-21 | 2020-10-23 | 广东电网有限责任公司电力科学研究院 | Early warning method and system for power frequency electromagnetic field contact of electric power worker |
| CN112229446A (en) * | 2020-10-12 | 2021-01-15 | 云南电网有限责任公司电力科学研究院 | Monitoring and warning system for power frequency electromagnetic field and noise of transformer substation |
| CN112924765A (en) * | 2021-02-02 | 2021-06-08 | 江苏方天电力技术有限公司 | Method and device for setting electromagnetic environment monitoring points of transformer substation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103760427A (en) * | 2014-01-15 | 2014-04-30 | 国家电网公司 | Statistical method of power frequency electromagnetic field distribution rules in transformer substation |
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| CN112229446A (en) * | 2020-10-12 | 2021-01-15 | 云南电网有限责任公司电力科学研究院 | Monitoring and warning system for power frequency electromagnetic field and noise of transformer substation |
| CN112924765A (en) * | 2021-02-02 | 2021-06-08 | 江苏方天电力技术有限公司 | Method and device for setting electromagnetic environment monitoring points of transformer substation |
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