CN110516309A - Roof power frequency electric field forecast Control Algorithm near common-tower double-return 500kV transmission line of electricity - Google Patents
Roof power frequency electric field forecast Control Algorithm near common-tower double-return 500kV transmission line of electricity Download PDFInfo
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- CN110516309A CN110516309A CN201910698646.4A CN201910698646A CN110516309A CN 110516309 A CN110516309 A CN 110516309A CN 201910698646 A CN201910698646 A CN 201910698646A CN 110516309 A CN110516309 A CN 110516309A
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- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
- G06Q50/06—Electricity, gas or water supply
Abstract
The present invention relates to a kind of forecast Control Algorithms of house roof power frequency electric field near common-tower double-return 500kV ultrahigh-voltage alternating-current transmission line of electricity, the following steps are included: 1) determine the horizontal distance d of external wall of house Yu transmission line of electricity recent side conducting wire by the relative position between the house and common-tower double-return 500kV transmission line of electricity considered；2) the relative vertical elevational h where determining transmission line of electricity lower side conducting wire between plane and roofr；3) the electric field strength E being likely to occur by estimation formula predictions roof test point；4) exposure limit as defined in E value and power frequency electric field public's exposure limit standard is compared, until E value is less than exposure limit, roof power frequency electric field level is controlled within exposure limit as defined in standard.The present invention can quickly and easily predict roof power frequency electric field, and planning, design and the environmental impact assessment for 500kV high-voltage alternating double back transmission line engineering provide reference.
Description
Technical field
The present invention relates to ultra-high-tension power transmission line, roof power frequency electric near especially a kind of common-tower double-return 500kV transmission line of electricity
The forecast Control Algorithm of field.
Background technique
With the rapid development of the national economy, social electrical energy demands amount is continuously increased, surpass, the scale of UHV transmission line
Also increasing, electromagnetic environmental impact problem is also more and more concerned.In particular with subjective reflection height of house and density
Step up, the distortion of power frequency electric field in house roof is particularly acute, and is become and is restricted line project planning, design and environmental protection and comment
An important factor for valence.Currently, since the planning and designing stage in line project usually all presses the ground of modular design regular situation
Electric field considers, lacks to the pre- of the electromagnetic environment in the case of distortion electric field (such as route nearby the distortion electric field in house roof)
Survey method brings line project electromagnetic environment to control risk, if just discovery power-frequency electric field strength is exceeded when building up environmental protection inspection and acceptance,
Take the cost of modification measures will be very high, work also will be very passive.Therefore, in the route project planning design phase to route
The PREDICTIVE CONTROL of the power frequency electric field level of neighbouring house roof is very necessary.Current power transmission route is nearby in house roof
The PREDICTIVE CONTROL of power-frequency electric field strength usually all predicts electric field by complicated electromagnetic-field simulation modeling and Electric Field Numerical Calculation
Level, then compare relevant criterion exposure limit judge whether may it is exceeded, find it is doubtful it is exceeded after then need to adjust correlation
Complicated simulation calculation is repeated in parameter, until finding the scheme that can be controlled electric field level within exposure limit.Lack
The forecast Control Algorithm that the one line engineers and technicians such as planning, design easily grasp.
Summary of the invention
The present invention proposes a kind of forecast Control Algorithm of neighbouring roof power frequency electric field of common-tower double-return 500kV transmission line of electricity,
Purpose is to plan for line project, design, construction and environmental impact assessment check and accept relevant line technology personnel provide it is a kind of easily grasp and
The forecast Control Algorithm for considering certain nargin avoids just finding that power-frequency electric field strength risk of exceeding criterion is route after route is built up
Power frequency electric field PREDICTIVE CONTROL providing method of the engineering in planning, design and environmental impact assessment stage.
To achieve the above object, to achieve the above object, the present invention considers 500kV extra high voltage network house nearby
The power frequency electric field level standard limit value on roof, measuring point regulation, roof distortion electric field influence factor, as line levels, wire arrangements,
House distance and relative altitude, the shaft tower type of route etc., under various working conditions, with finite element emulation software to 500kV
The power frequency electric field distribution of house roof has carried out a large amount of emulation near transmission line of electricity, obtains different condition lower room roof by mark
Power frequency electric field data in measurement position as defined in standard, then using approximating method analyzing influence field distribution and electric field level
Key factor finds the relative altitude between distance and roof and line conductor of the house apart from transmission line of electricity to roof electric field water
It is flat to have conclusive influence, and the distance and roof and line conductor that roof distortion electric field is horizontal and house is apart from transmission line of electricity
Between relative altitude between relationship substantially conform to three rank multinomial fit correlations.After further considering certain nargin,
The PREDICTIVE CONTROL formula of power frequency electric field on roof test point is obtained, in conjunction with relevant criterion and engineering practical experience to formula
Application range has carried out certain limitation.Roof can be estimated by not having to complicated numerical value calculating using obtained predictor formula
Whether industrial frequency control level can be up to standard.
Technical solution of the present invention the following steps are included:
A kind of forecast Control Algorithm of the neighbouring roof power frequency electric field of common-tower double-return 500kV transmission line of electricity, comprising the following steps:
1) by the relative position between the house and common-tower double-return 500kV transmission line of electricity considered, determine the exterior wall in house with
The horizontal distance of transmission line of electricity recent side conducting wire is dm；
2) vertical height where determining transmission line of electricity lower side conducting wire between plane and roof is hrm；
3) the electric field strength E being likely to occur by following estimation formula predictions roof test point；
Wherein E is the electric field strength that roof test point is likely to occur, and d is external wall of house and transmission line of electricity recent side conducting wire
Horizontal distance, hrVertical height where the conducting wire of transmission line of electricity lower side between plane and roof.
4) exposure limit as defined in standard GB8702-2014 prevailing for the time being in force is 4kV/m, by E value and the power frequency electric field public
Exposure limit as defined in exposure limit standard compares, if E value is less than exposure limit, prediction power frequency electric field level in roof has been controlled
System is within exposure limit as defined in standard；If E value is more than or equal to exposure limit, i.e. prediction roof power frequency electric field level is exceeded,
Then h is improved by engineering enabled conditionrOr d, the power-frequency electric field strength being likely to occur again by formula (1) prediction roof test point,
Until E value is less than exposure limit, roof power frequency electric field level is controlled within exposure limit as defined in standard.
The beneficial effects of the present invention are:
The present invention can the neighbouring roof power frequency electric field of ground prediction 500kV transmission line of electricity, judge power-frequency electric field strength whether
To effective control, and can quick predict judge line levels and the change away from house distance to the effect for controlling electric field strength, line
Road project planning, design, construction and environmental impact assessment are checked and accepted relevant line technology personnel and are easily grasped.For super, extra-high-voltage alternating current double back
Work transmission line planning, design and the power frequency electric field PREDICTIVE CONTROL in environmental impact assessment stage provide method.
Domestic super-pressure only has 330kV, 500kV, 750kV at present, and wherein the route of two voltage of 330kV and 750kV is all
Seldom, 500kV is the most common supertension line and engineering encounters problems most routes, thus the present invention just for
The transmission line of electricity of 500kV voltage class.
Detailed description of the invention
Fig. 1 is the PREDICTIVE CONTROL of roof power frequency electric field near a kind of common-tower double-return 500kV transmission line of electricity proposed by the present invention
The flow chart of method；
Fig. 2 is route-shaft tower-house three-dimensional simulation model explanatory diagram in specific implementation method；
Fig. 3 is the relative position schematic top plan view of house and route.
Specific embodiment
With reference to the accompanying drawing, pre- with the power frequency electric field of house roof near an angle tower in certain 500kV work transmission line
Observing and controlling is made as preferred embodiment and elaborates to the method for the present invention.It is emphasized that following the description is only exemplary,
The range and its application being not intended to be limiting of the invention.
Fig. 1 is the forecast Control Algorithm of roof power frequency electric field near common-tower double-return 500kV transmission line of electricity provided by the invention
Flow chart, detailed analysis is done to detailed process of the invention in conjunction with preferred embodiment, is included the following steps:
(1) the horizontal distance d close to power transmission line trackside external wall of house and the projection of transmission line of electricity outermost conducting wire is determined, d's
Range is 5≤d≤25m.
(2) the plane interplanar parallel with roof with transmission line of electricity lower side conducting wire place where setting house roof is vertical
Directly distance hr, hrRange be 9≤hr≤25m。
(3) (d, the h that will be determined in (1), (2)r) substitute into estimation formula
Obtain the horizontal E of power frequency electric field being likely to occur on roof test point under this condition.
(4) if the E value being calculated in (3) is less than exposure limit, prediction power frequency electric field level in roof, which has controlled, to be marked
Within exposure limit as defined in standard；If E value is more than or equal to exposure limit, h must be improved by engineering enabled conditionrOr d, it presses again
The power-frequency electric field strength that estimation formula predictions roof test point is likely to occur, until E value is less than exposure limit.
In order to than than existing methods with the property of the method for the present invention and easy Grasping level and verify the accurate of the method for the present invention with
Reliability establishes the three-dimensional of residential house roof power frequency electric field simulation calculation near one angle tower of certain common-tower double-return 500kV transmission line of electricity
Simulation model, as shown in Fig. 2, carry out simulation calculation to the power frequency electric field on residential house roof, and with the estimated value of the method for the present invention into
Row comparative analysis.House is arranged in the different location of environmental impact assessment region-of-interest, the relative position signal such as Fig. 3 in house and angle tower
It is shown.Different house location numbers are 1~4, need to be answered using expensive professional electromagnetic simulation software using existing method
Miscellaneous electromagnetic-field simulation computation modeling, as shown in Fig. 2, and the electric field strength on roof test point is calculated by Multi simulation running
Simulation and prediction value E ' needs experienced Electromagnetic Simulation professional technician that could grasp.And the method for the present invention is used, corresponding
(d, hr) estimation formula proposed by the present invention is substituted into, it calculates simply, is analyzed without complicated modeling and simulation, that is, can be predicted summary
The power-frequency electric field strength E being likely to occur on the roof test point of conservative estimation.The roof electric field obtained using two methods it is pre-
Measured value and the comparison of simulation and prediction value are as shown in table 1.
The existing simulation and prediction control method of table 1 and the method for the present invention Comparative result table
In table 1, after No. 1 house just to be set to position substitution estimation formula, prediction electric field E value is greater than 4kV/m, and such as consideration increases
Distance d obtains No. 2 house locations between house and route, after No. 2 houses just to be set to position substitution estimation formula, predicts electric field E value
Less than 4kV/m, the roof power frequency electric field level in No. 2 houses has been effectively controlled at this time.Similar, such as consider No. 3 and No. 4
The house of position, after its position is substituted into estimation formula, prediction electric field E value is both less than 4kV/m.
Seen from table 1, using the electric field strength of the method for the present invention estimation and the deviation of existing simulation result 5%
Left and right, the nargin for having about 5% of the method for the present invention prediction can simple and fast and accurately PREDICTIVE CONTROL roof power frequency electric field
It is horizontal.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with scope of protection of the claims
Subject to.
Claims (1)
1. the forecast Control Algorithm of roof power frequency electric field near a kind of common-tower double-return 500kV transmission line of electricity, which is characterized in that including
Following steps:
1) by the relative position between house and common-tower double-return 500kV transmission line of electricity, the exterior wall and transmission line of electricity for determining house are most
The horizontal distance of proximal guidewire is d；
2) vertical height where determining transmission line of electricity lower side conducting wire between plane and the roof in house is hr；
3) the electric field strength E that prediction roof test point is likely to occur, formula are as follows；
Wherein, d is the exterior wall in house and the horizontal distance of transmission line of electricity recent side conducting wire, hrFor transmission line of electricity lower side conducting wire institute
Vertical height between plane and the roof in house；
4) exposure limit as defined in standard GB8702-2014 prevailing for the time being in force is 4kV/m, and E value and the power frequency electric field public are exposed to the open air
Exposure limit as defined in standard limit compares, if E value is less than exposure limit, prediction power frequency electric field level in roof has been controlled
Within exposure limit as defined in standard；If E value is more than or equal to exposure limit, i.e. prediction roof power frequency electric field level is exceeded, then presses
Engineering enabled condition improves hrOr d, the power-frequency electric field strength being likely to occur again by formula (1) prediction roof test point, until E
Value is less than exposure limit, and roof power frequency electric field level controls within exposure limit as defined in standard.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910698646.4A CN110516309B (en) | 2019-07-31 | 2019-07-31 | Method for predicting and controlling power frequency electric field of roof near same-tower double-circuit 500kV power transmission line |
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| CN201910698646.4A CN110516309B (en) | 2019-07-31 | 2019-07-31 | Method for predicting and controlling power frequency electric field of roof near same-tower double-circuit 500kV power transmission line |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112765773A (en) * | 2020-12-25 | 2021-05-07 | 浙江大学 | Method for determining public electric field exposure dose near extra-high voltage direct current transmission line |
| CN113009244A (en) * | 2019-12-20 | 2021-06-22 | 电力规划总院有限公司 | Method for calculating safe distance of overhead transmission line |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113009244A (en) * | 2019-12-20 | 2021-06-22 | 电力规划总院有限公司 | Method for calculating safe distance of overhead transmission line |
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| CN112765773A (en) * | 2020-12-25 | 2021-05-07 | 浙江大学 | Method for determining public electric field exposure dose near extra-high voltage direct current transmission line |
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