CN103453942B - Measure the method for 500kV substation operation human contact power frequency electric field, magnetic field intensity - Google Patents
Measure the method for 500kV substation operation human contact power frequency electric field, magnetic field intensity Download PDFInfo
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- CN103453942B CN103453942B CN201310418189.1A CN201310418189A CN103453942B CN 103453942 B CN103453942 B CN 103453942B CN 201310418189 A CN201310418189 A CN 201310418189A CN 103453942 B CN103453942 B CN 103453942B
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- 230000005684 electric field Effects 0.000 title claims abstract description 86
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Abstract
The present invention relates to a kind of method measuring 500kV substation operation human contact power frequency electric field, magnetic field intensity, it can reflect the level of substation operation human contact power frequency electric field, power frequency magnetic field intensity the most really, and concrete steps are: A records the times N that operations staff makes an inspection tour in a shift; The total distance L of patrol route when B determines that operations staff makes an inspection tour, single patrol route
alwaysand need each inspection point provided of stop; When C records the tour of operations staff's single, the Annual distribution on patrol route; D layouts 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 the residence time T in pulpit
control, the power-frequency electric field strength of detection control room and magnetic field intensity; G contacts power-frequency electric field strength to operating personnel and magnetic field intensity carries out computational analysis, draws the level of substation operation human contact power frequency electric field, power frequency magnetic field intensity.
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 method measuring 500kV substation operation human contact power frequency electric field, magnetic field intensity.
Background technology:
Research shows, the impact on human body of power frequency electric field, power frequency magnetic field is of short duration effect, and does not have cumulative function.Power frequency electric field, power frequency magnetic field be transformer station exist may to human body produce harm principal element, but about operations staff contact power frequency electric field, power frequency magnetic field intensity research few.
At present, " workplace harmful factors occupational exposure limit part 2: physics adverse factor " (GBZ2.2-2007) specifies, the exposure limit of power frequency electric field is 5kVm, " power industry work situation Specifications of Monitoring Technology " (DL/T799-2010) specifies, 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, the measuring method to substation operation human contact power frequency electric field, power frequency magnetic field intensity is lacked.
Summary of the invention:
The present invention is for overcoming above-mentioned the deficiencies in the prior art, there is provided a kind of and measure 500kV substation operation human contact power frequency electric field, the method of magnetic field intensity, it effectively can measure power frequency electric field, magnetic field intensity, thus reflect substation operation human contact power frequency electric field the most really, the level of power frequency magnetic field intensity, substation operation human contact power frequency electric field and power frequency magnetic field intensity can be specified exceed standard activity duration of setting, and particular location and duration of contact that operations staff contacts the setting that exceeds standard can be specified, thus can the patrol route of operating personnel be adjusted for next step or adjust its activity duration reference frame is provided.
For achieving the above object, the object of the invention is to adopt following technical proposals to realize:
Measure a method for 500kV substation operation human contact power frequency electric field, magnetic field intensity, concrete steps are:
A records the times N that operations staff makes an inspection tour in a shift;
The total distance L of patrol route when B determines that operations staff makes an inspection tour, single patrol route
alwaysand need each inspection point provided of stop;
When C records the tour of operations staff's single, the Annual distribution on patrol route;
D layouts 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 the residence time T in pulpit
control, the power-frequency electric field strength of detection control room and magnetic field intensity;
G contacts power-frequency electric field strength to operating personnel and magnetic field intensity carries out computational analysis, draws the level of substation operation human contact power frequency electric field, power frequency magnetic field intensity.
The detailed process of described step C is:
C1 investigates the tour time T that single is maked an inspection tour
patrol;
C2 investigation is at the residence time T of each inspection point provided
point is total=t
1+ t
2+ ... t
n, t
nrepresent the residence time at the n-th inspection point provided;
The walking 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:
Layout according to the same manner between each two adjacent inspection point provideds of D1, namely first the mid point of two adjacent inspection point provided spacing is labeled as No. 1 and layouts;
Then No. 1 layouted and be labeled as No. 2 respectively with the mid point of the spacing of adjacent inspection point provided and layout by D2;
Two No. 2 are layouted and are labeled as No. 3 respectively with the mid point of inspection point provided adjacent separately and No. 1 cloth dot spacing and layout by D3 more respectively;
D4 two No. 3 layout respective two consecutive point be inspection point provided and No. 2 layout and No. 1 layout and No. 2 layout, then select all No. 3 to layout and be labeled as No. 4 with the mid point of the spacing of its each consecutive point and layout respectively;
D5 proceeds to select according to mentioned above principle, until to layout and distance between consecutive point is no more than 1m;
D6 detects above-mentioned power-frequency electric field strength of respectively layouting and magnetic field intensity;
If the power-frequency electric field strength at the D7 place of layouting is more than 5kV/m, and the testing result of consecutive point does not exceed above-mentioned value, then needs to select the place of layouting to carry out continuing to layout with the distance mid point at consecutive point place according to aforementioned principle, and detect the power-frequency electric field strength of layouting; If the testing result of this point still exceedes above-mentioned value, then 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, then power-frequency electric field strength can draw more than all inspection point provideds of 5kV/m and the tour time sum of above-mentioned inspection point provided, uses T
electric field, point is superrepresent;
Power frequency magnetic field intensity can draw more than all inspection point provideds of 0.5mT and the tour time sum of above-mentioned inspection point provided, uses T
magnetic field, point is superrepresent;
The power-frequency electric field strength that G2 patrol route is layouted is layouted to add up draw more than 5kV/m's, this type of layout at least 3 adjacent and can line segment be connected into, add up each line segment adjacent two layout between distance, represent with Ln; Then the summation of two distances of layouting that all line segments are adjacent is
The power frequency magnetic field intensity that patrol route is layouted is layouted to add up draw more than 0.5mT's, this type of layout at least 3 adjacent and can line segment be connected into, add up each line segment adjacent two layout between distance, represent with Dn; Then the summation of two distances of layouting that all line segments are adjacent is
Total distance that G3 investigates patrol route is L
always, then the speed of walking about on the patrol route except inspection point provided is L
always/ T
route;
G4 then contacts on patrol route
On patrol route, power frequency magnetic field intensity contact more than the time sum of 0.5mT is
It is T that G5 single contacts power-frequency electric field strength more than the time of 5kV/m in making an inspection tour
electric field, singly patrols super=T
electric field, point is super+ T
electric field, line surpasses;
It is T that single contacts power frequency magnetic field intensity more than the time of 0.5mT in making an inspection tour
magnetic field, singly patrols super=T
magnetic field, point is super+ T
magnetic field, line surpasses;
Contacting power-frequency electric field strength in the single shift of G6 in all tour processes is T more than the time of 5kV/m
electric field, patrols super=N × T
electricity , singly patrol super;
Contacting power frequency magnetic field intensity in single shift in all tour processes is T more than the time of 0.5mT
magnetic field, patrols super=N × T
magnetic , singly patrol super;
G7 finally calculates, if the power-frequency electric field strength of pulpit is more than 5kV/m, then in single shift, operating personnel contacts power-frequency electric field strength more than the time of 5kV/m is T
electric field, patrols super+ T
control; If the power-frequency electric field strength of pulpit is not more than 5kV/m, then in single shift, operating personnel contacts power-frequency electric field strength more than the time of 5kV/m is T
electric field, patrols super;
If the power frequency magnetic field intensity of pulpit is more than 0.5mT, then in single shift, operating personnel contacts power frequency magnetic field intensity more than the time of 0.5mT is T magnetic field, patrols super+T and controls; If the power frequency magnetic field intensity of pulpit is not more than 0.5mT, then in single shift, operating personnel contacts power frequency magnetic field intensity more than the time of 0.5mT is T
magnetic field, patrols super.
The invention has the beneficial effects as follows, the present invention can reflect the level of substation operation human contact power frequency electric field, power frequency magnetic field intensity the most really, substation operation human contact power frequency electric field and power frequency magnetic field intensity can be specified exceed standard activity duration of setting, and operations staff's contact can be specified exceed standard the particular location of setting and duration of contact, thus can the patrol route of operating personnel be adjusted for next step or adjust its activity duration reference frame is provided.
Embodiment:
Below in conjunction with embodiment, the present invention is further described.
A kind of method assessing substation operation human contact power-frequency electric field strength is as follows:
1. certain 500kV operations staff shift is 2 days 48 hours, makes an inspection tour 6 times altogether in a shift.
2. the total distance of the tour of operations staff is 1020 meters, needs the inspection point provided stopped to be 69, comprising: #1 bus (CVT), mother I, the change of #1 station, #2B are low anti-etc.
3. when operations staff's single is maked an inspection tour, total tour time T
patrolbe 70 minutes, the residence time of inspection point provided is 50 minutes, and the walking time of patrol route is 20 minutes.
4. power-frequency electric field strength is more than the inspection point provided totally 7 of 5kV/m, and the residence time is 5 minutes altogether.
5. on patrol route power-frequency electric field strength more than layout totally 80 of 5kV/m, all line segments that formed of respectively exceeding standard adjacent two to layout that distance sum gathers 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 surpasses=120/ (1020/20)=2.4 minute, T
electric field, singly patrols super=T
electric field, point is super+ T
electricity , line surpasses=5+2.4=7.4 minute, T
electric field, patrols super=N × T
electric field, singly patrols super=6 × 7.4=44.4 minute.
8. final statistics draws, operations staff shift, in 2 days 48 hours, has 44.4 minutes contact power-frequency electric field strengths more than 5kV/m.
A kind of method assessing substation operation human contact power frequency magnetic field intensity is as follows:
1. certain 500kV operations staff shift is 2 days 48 hours, makes an inspection tour 6 times altogether in a shift.
2. the total distance of the tour of operations staff is 1020 meters, needs the inspection point provided stopped to be 69, comprising: #1 bus (CVT), mother I, the change of #1 station, #2B are low anti-etc.
3. when operations staff's single is maked an inspection tour, total tour time T
patrolbe 70 minutes, the residence time of inspection point provided is 50 minutes, and the walking time of patrol route is 20 minutes.
4. power frequency magnetic field intensity is more than the inspection point provided totally 2 of 0.5mT, and the residence time is 1.5 minutes altogether.
5. on patrol route power frequency magnetic field intensity more than layout totally 10 of 0.5mT, all line segments that formed of respectively exceeding standard adjacent two to layout that distance sum gathers 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 surpasses=15/ (1020/20)=0.3 minute, T
magnetic field, singly patrols super=T
magnetic field, point is super+ T
magnetic field, line surpasses=1.5+0.3=1.8 minute, T
magnetic field, patrols super=N × T
magnetic field, singly patrols super=6 × 1.8=10.8 minute.
8. final statistics draws, operations staff shift, in 2 days 48 hours, has 10.8 minutes contact power frequency magnetic field intensities more than 0.5mT.
Claims (1)
1. measure a method for 500kV substation operation human contact power frequency electric field, magnetic field intensity, it is characterized in that, concrete steps are:
A records the times N that operations staff makes an inspection tour in a shift;
The total distance L of patrol route when B determines that operations staff makes an inspection tour, single patrol route
alwaysand need each inspection point provided of stop;
When C records the tour of operations staff's single, the Annual distribution on patrol route;
D layouts 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 the residence time T in pulpit
control, the power-frequency electric field strength of detection control room and magnetic field intensity;
G contacts power-frequency electric field strength to operating personnel and magnetic field intensity carries out computational analysis, draws the level of substation operation human contact power frequency electric field, power frequency magnetic field intensity;
The detailed process of described step D is:
Layout according to the same manner between each two adjacent inspection point provideds of D1, namely first the mid point of two adjacent inspection point provided spacing is labeled as No. 1 and layouts;
Then No. 1 layouted and be labeled as No. 2 respectively with the mid point of the spacing of adjacent inspection point provided and layout by D2;
Two No. 2 are layouted and are labeled as No. 3 respectively with the mid point of inspection point provided adjacent separately and No. 1 cloth dot spacing and layout by D3 more respectively;
D4 two No. 3 layout respective two consecutive point be inspection point provided and No. 2 layout and No. 1 layout and No. 2 layout, then select all No. 3 to layout and be labeled as No. 4 with the mid point of the spacing of its each consecutive point and layout respectively;
D5 proceeds to select according to mentioned above principle, until to layout and distance between consecutive point is no more than 1m;
D6 detects above-mentioned power-frequency electric field strength of respectively layouting and magnetic field intensity;
If the power-frequency electric field strength at the D7 place of layouting is more than 5kV/m, and the testing result of consecutive point does not exceed above-mentioned value, then needs to select the place of layouting to carry out continuing to layout with the distance mid point at consecutive point place according to aforementioned principle, and detect the power-frequency electric field strength of layouting; If the testing result of this point still exceedes above-mentioned value, then 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 C is:
C1 investigates the tour time T that single is maked an inspection tour
patrol;
C2 investigation is at the residence time T of each inspection point provided
point is total=t
1+ t
2+ ... t
n, t
nrepresent the residence time at the n-th inspection point provided;
The walking 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 G is:
G1 adds up power-frequency electric field strength and the power frequency magnetic field intensity of each inspection point provided, then power-frequency electric field strength can draw more than all inspection point provideds of 5kV/m and the tour time sum of above-mentioned inspection point provided, uses T
electric field, point is superrepresent;
Power frequency magnetic field intensity can draw more than all inspection point provideds of 0.5mT and the tour time sum of above-mentioned inspection point provided, uses T
magnetic field, pointsuper expression;
The power-frequency electric field strength that G2 patrol route is layouted is layouted to add up draw more than 5kV/m's, this type of layout at least 3 adjacent and can line segment be connected into, add up each line segment adjacent two layout between distance, represent with Ln; Then the summation of two distances of layouting that all line segments are adjacent is
The power frequency magnetic field intensity that patrol route is layouted is layouted to add up draw more than 0.5mT's, this type of layout at least 3 adjacent and can line segment be connected into, add up each line segment adjacent two layout between distance, represent with Dn; Then the summation of two distances of layouting that all line segments are adjacent is
Total distance that G3 investigates patrol route is L
always, then the speed of walking about on the patrol route except inspection point provided is L
always/ T
road line;
G4 then contacts on patrol route
On patrol route, power frequency magnetic field intensity contact more than the time sum of 0.5mT is
It is T that G5 single contacts power-frequency electric field strength more than the time of 5kV/m in making an inspection tour
electric field, singly patrols super=T
electric field, point is super+ T
electric field, line surpasses;
It is T that single contacts power frequency magnetic field intensity more than the time of 0.5mT in making an inspection tour
magnetic field, singly patrols super=T
magnetic field, point is super+ T
magnetic field, line surpasses;
Contacting power-frequency electric field strength in the single shift of G6 in all tour processes is T more than the time of 5kV/m
electric field, patrols super=N × T
electricity , singly patrol super;
Contacting power frequency magnetic field intensity in single shift in all tour processes is T more than the time of 0.5mT
magnetic field, patrols super=N × T
magnetic field, singly patrol super;
G7 finally calculates, if the power-frequency electric field strength of pulpit is more than 5kV/m, then in single shift, operating personnel contacts power-frequency electric field strength more than the time of 5kV/m is T
electric field, patrols super+ T
control; If the power-frequency electric field strength of pulpit is not more than 5kV/m, then in single shift, operating personnel contacts power-frequency electric field strength more than the time of 5kV/m is T
electric field, patrols super;
If the power frequency magnetic field intensity of pulpit is more than 0.5mT, then in single shift, operating personnel contacts power frequency magnetic field intensity more than the time of 0.5mT is T
magnetic field, patrols super+ T
control; If the power frequency magnetic field intensity of pulpit is not more than 0.5mT, then in single shift, operating personnel contacts power frequency magnetic field intensity more than the time of 0.5mT is T
magnetic field, patrols super.
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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 |
| CN103810355B (en) * | 2014-03-12 | 2018-01-30 | 国家电网公司 | Transformer station's high-voltage switch gear field power frequency electric field three dimensional analysis method |
| 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 |
| CN112924765B (en) * | 2021-02-02 | 2023-05-05 | 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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2013
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