CN106707046A - DC transmission line audible noise altitude correction method - Google Patents
DC transmission line audible noise altitude correction method Download PDFInfo
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- CN106707046A CN106707046A CN201510414152.0A CN201510414152A CN106707046A CN 106707046 A CN106707046 A CN 106707046A CN 201510414152 A CN201510414152 A CN 201510414152A CN 106707046 A CN106707046 A CN 106707046A
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Abstract
The invention relates to a DC transmission line audible noise altitude correction method. The method comprises the steps of (1) calculating a transmission line wire surface electric field intensity, (2) calculating the increment Delta AN of DC transmission line audible noise of an arbitrary altitude h relative to a 0m altitude according to the electric field intensity, and (3) determining a transmission line audible noise Anh of the arbitrary altitude h with a 0m altitude DC transmission line audible noise AN0 as a reference. According to the technical scheme of the invention, a disadvantage that an existing DC audible noise altitude correction method applies an alternating current line to correct a conclusion and has no experimental basis is solved.
Description
Technical field：
The present invention relates to the audible noise Forecasting Methodology caused by transmission line of electricity corona in power domain, more
Body is related to a kind of DC power transmission line audible noise altitude correcting method.
Background technology：
In recent years, the HVDC Transmission Technology of China quickly grows, voltage class covered ± 400kV, ±
500kV, ± 660kV and ± 800kV, future is also by construction ± 1100kV DC lines.But due to me
State's energy centre is generally within northwest, southwest and Tibet region, and above-mentioned regional height above sea level is universal higher.Sea
Increase is pulled out, atmospheric density is more thin, electronics free travel increases, conductive line surfaces corona discharge is easier
Occur, wire is substantially increased by the audible noise that line corona causes.Due to High aititude and low altitude area
Same environment protectment protection is performed, therefore DC line is built in high altitude localities, it is necessary to take corresponding
Measure meets environmentally friendly limit value requirement to ensure audible noise, and this is required will be to high altitude localities direct current transportation
Circuit audible noise level has an accurately prediction.High aititude DC power transmission line electromagnetic environment is pre-
Control technology will be the key issue for needing to solve during HVDC Transmission Technology develops.
On DC line audible noise altitude correcting method, typically all in zero height above sea level audible noise value
On the basis of add a height above sea level incrementss, wherein the audible noise value of zero height above sea level can be by calculating or testing
Go out, but how the height above sea level increase of audible noise determines, there is no national standard and professional standard to put into effect at present.
In engineering field, it is audible to predict high altitude localities DC line typically to continue to use the conclusion of transmission line of alternation current
Noise, i.e. U.S. EPRI (Electric Power Research Institute) propose " height above sea level often increases 300m, audible to make an uproar
The conclusion of 1 decibel of sound increase ".But because there is larger area in the corona characteristic of DC line and alternating current circuit
Not, therefore, the transmission line of alternation current audible noise modification method recommended in the world at present is not particularly suited for me
The DC transmission engineering of state.
Therefore, " ± 500kV DC power transmission lines total electric field, nothing have been carried out in State Grid Corporation of China's project verification
Line electrical interference and audible noise height above sea level amendment experimental study ", by height above sea level 50m, 1700m, 3400m,
4300m builds multiple DC experiment line segments, carries out the DC line audible noise pair under different altitude height
Than experimental study, the audible noise altitude correcting method of suitable China's geography and climate feature is obtained.
The content of the invention：
It is an object of the invention to provide a kind of DC power transmission line audible noise altitude correcting method, solve
Current DC power transmission line audible noise height above sea level revised law applies mechanically alternating current circuit amendment conclusion, without test basis
The drawbacks of.
To achieve the above object, the present invention uses following technical scheme：A kind of DC power transmission line is audible to make an uproar
Sound altitude correcting method, comprises the following steps：
1) computing electric power line conductive line surfaces electric-field intensity；
2) the DC power transmission line audible noise phase of any height above sea level h is calculated according to the electric-field intensity
To the incrementss Δ of 0m height above sea levelAN；
3) with 0m height above sea level DC power transmission line audible noise values AN0On the basis of, determine at height above sea level h
Transmission line of electricity audible noise ANh。
The step 1) in conductive line surfaces electric-field intensity E be the flat of all sub-conductors maximum surface electric field intensities
Average, and according to HVDC transmission line wire parameter and line construction parameter, using gradually image method
Or equivalent redius method is calculated.
The step 2) in incrementss ΔANDetermined by following formula：
ΔAN=kAN/[1+ea(h-b)]
In formula, a, b are constant, kANIt is correction factor.
The correction factor is determined by following formula：
kAN=β2E2+β1E+β0
In formula, β2、β1And β0Audible noise result of the test according under two height above sea level difference voltages is obtained
The constant for arriving.
The step 3) in audible noise ANhObtained by theoretical calculation or on-the-spot test.
The audible noise ANhDetermined by following formula：
ANh=AN0+ΔAN。
According to different transmission line wire patterns, the span of the constant a is -1.0 × 10-3~-3.0
×10-3, the span of the constant b is 2000~3500.
With immediate prior art ratio, the present invention provides technical scheme has following excellent effect
1st, technical solution of the present invention considers different conductor pattern and different conductor surface electric field intensity, is applicable model
Enclose wider；
2nd, the experiment that technical solution of the present invention is based under many height above sea levels of 0~4300m show that prediction is high
The audible noise of Altitude Regions is more accurate；
3rd, technical solution of the present invention provides technical basis for China's High aititude DC Transmission Line Design；
4th, technical solution of the present invention can better meet the environment when transmission line of electricity is built in high altitude localities
Protection is required.
Brief description of the drawings
Fig. 1 is the coefficient k of the embodiment of the present inventionANWith the graph of relation of conductive line surfaces electric-field intensity E；
Fig. 2 be the embodiment of the present invention in conductive line surfaces field intensity 24.3kV/cm, DC simulation test line segment
The comparative result figure of the modification method that audible noise measured value is recommended with the present invention；
Fig. 3 be the embodiment of the present invention in conductive line surfaces field intensity 27.6kV/cm, DC simulation test line segment
The comparative result figure of the modification method that audible noise measured value is recommended with the present invention；
Fig. 4 for the embodiment of the present invention be applied to ± 500kV DC lines when, audible noise height above sea level amendment side
The comparative result figure of method and foreign recommended method；
Fig. 5 is technical solution of the present invention method flow diagram.
Specific embodiment
With reference to embodiment, the invention will be described in further detail.
Embodiment 1：
The invention of this example provides a kind of DC power transmission line audible noise altitude correcting method, for High aititude
Regional HVDC transmission line audible noise predicts computational problem, can easily and accurately calculate High aititude high
The audible noise level of straightening Flow Line.
The specific steps of present invention method are as shown in figure 5, be：
(1) computing electric power line conductive line surfaces electric-field intensity
According to HVDC transmission line wire parameter and line construction parameter, using gradually image method or wait
Effect radius method calculates conductive line surfaces electric-field intensity E.
(2) audible noise height above sea level correction is calculated
The DC power transmission line audible noise of any height above sea level h (unit is m) is calculated with respect to 0m height above sea level
Incrementss ΔAN, ΔAN=kAN/[1+ea(h-b)], in formula, a, b are constant.kANIt is and conductive line surfaces
Electric-field intensity E relevant variable, kAN=β2E2+β1E+β0, β2、β1、β0It is according to result of the test
The constant for obtaining.
β2、β1、β0Acquisition methods be：One group of voltage is applied to the DC line under Different Altitude at two,
Under different conductive line surfaces field intensity E, by audible noise test result can Extrapolation obtain one group
kAN, by least square fitting, β can be obtained2、β1、β0Value.
(3) different altitude height DC power transmission line audible noise level is calculated
The audible noise ANhDetermined by following formula：
ANh=AN0+ΔAN。
The DC simulation test wire of Different Altitude everywhere in Beijing and Tibet is located at State Grid Corporation of China below
Effect of the invention is illustrated as a example by the audible noise result of the test of section.
DC simulation test line segment is located at Changping County, Beijing area, Tibet Chayu County, Tibet Gong Bujiang respectively everywhere
Daxian county and Tibet Dangxiong County, height above sea level are respectively 50m, 1700m, 3400m and 4300m, experiment
Line segment sets up 4 × 95mm of same types2Wire, line length is 100m.On test line segment
DC voltage is applied to bipolar conductor, will be produced after the surface electric field intensity of wire exceedes critical bloom field intensity
Audible noise, the audible noise under measurement Different Altitude test line segment, and test result is pushed away with the present invention
The method recommended is compared.
In experiment, test voltage value is respectively ± 220kV and ± 250kV, according to line construction and wire
Parameter, using gradually image method be calculated under voltage conductive line surfaces field intensity difference 24.3kV/cm and
27.6kV/cm, with reference to the accompanying drawings 1 k for being givenANWith the corresponding relation of conductive line surfaces field intensity, can be in the hope of kAN
Value be respectively 8.7 and 11.6.According to different transmission line wire patterns, the value of the constant a
Scope is -1.0 × 10-3~-3.0 × 10-3, the span of the constant b is 2000~3500.A, b's
Value is anti-by measuring the audible noise data that obtain under different altitude height DC power transmission line everywhere
Push away what is obtained, for different wire patterns, due to increasing in the interval audible noise height above sea level of Different Altitude
Amount is different, and the value of a, b can also change.
For 4 × 95mm2Wire, according to Different Altitude result of the test by Extrapolation, recommends constant
The value of a and b is respectively -0.0018 and 2900, and Different Altitude can be calculated using the computing formula
The incrementss of audible noise Relative Zero height above sea level under height.According to the audible noise result of the test under zero height above sea level,
Under ± 220kV and ± 250kV voltages audible noise measuring assembly average be respectively 34.7dB (A) and
41.4dB (A), adds foregoing audible noise height above sea level incrementss, it can be deduced that Different Altitude on the basis of the value
Audible noise level under height.Fig. 2 and Fig. 3 sets forth applied voltage be respectively ± 220kV and
The audible noise height above sea level fair curve and measured value being calculated according to recommendation method of the present invention during ± 250kV
Contrast.
As can be seen from Figure, using audible noise altitude correcting method proposed by the present invention, can relatively be defined
True prediction audible noise level under Different Altitude, and DC line audible noise can be objectively responded
The non-linear growth variation tendency showed with height above sea level increase.I.e. in the range of 0~1500m of height above sea level,
Audible noise is slowly increased with height above sea level increase, in the range of 1500~3500m, audible noise
As height above sea level increase increases sharply, more than after 3500m, audible noise is presented saturation state to height above sea level,
As height above sea level increases, gathering way for audible noise gradually ease up.
Fig. 4 gives the present invention audible noise height above sea level amendment side of recommendation by taking ± 500kV DC lines as an example
Method recommends the contrast of method with foreign countries ERPI.As can be seen that for ± 500kV DC lines, application
The audible noise that DC line audible noise height above sea level correction formula prediction proposed by the present invention is obtained is with height above sea level
Incrementss than by the small of U.S.'s EPRI formula predictions, by taking height above sea level 0m to 4300m as an example, by this report
The audible noise incrementss of formula predictions are 4.98dB, only by U.S. EPRI formula predictions values [14.3dB
(A)] 35%.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention rather than to it
Limitation, those of ordinary skill in the art with reference to above-described embodiment although should be understood：Still can be right
Specific embodiment of the invention is modified or equivalent, and these are without departing from spirit of the invention and model
Any modification enclosed or equivalent, apply pending claims of the invention it
It is interior.
Claims (7)
1. a kind of DC power transmission line audible noise altitude correcting method, it is characterised in that：Comprise the following steps：
1) computing electric power line conductive line surfaces electric-field intensity；
2) the DC power transmission line audible noise of any height above sea level h is calculated according to the electric-field intensity with respect to 0m
The incrementss Δ of height above sea levelAN；
3) with 0m height above sea level DC power transmission line audible noise values AN0On the basis of, determine to be transmitted electricity at height above sea level h
Circuit audible noise ANh。
2. a kind of DC power transmission line audible noise altitude correcting method as claimed in claim 1, its feature
It is：The step 1) in conductive line surfaces electric-field intensity E be the average of all sub-conductors maximum surface electric field intensities
Value, and according to HVDC transmission line wire parameter and line construction parameter, using gradually image method or waits
Effect radius method is calculated.
3. a kind of DC power transmission line audible noise altitude correcting method as claimed in claim 1, its feature
It is：The step 2) in incrementss ΔANDetermined by following formula：
ΔAN=kAN/[1+ea(h-b)]
In formula, a, b are constant, kANIt is correction factor.
4. a kind of DC power transmission line audible noise altitude correcting method as claimed in claim 3, its feature
It is：The correction factor is determined by following formula：
kAN=β2E2+β1E+β0
In formula, β2、β1And β0Audible noise result of the test according under two height above sea level difference voltages is obtained
Constant.
5. a kind of DC power transmission line audible noise altitude correcting method as claimed in claim 1, its feature
It is：The step 3) in audible noise ANhObtained by theoretical calculation or on-the-spot test.
6. a kind of DC power transmission line audible noise altitude correcting method as claimed in claim 5, its feature
It is：The audible noise ANhDetermined by following formula：
ANh=AN0+ΔAN。
7. a kind of DC power transmission line audible noise altitude correcting method as claimed in claim 3, it is special
Levy and be：According to different transmission line wire patterns, the span of the constant a is -1.0 × 10-3~-3.0
×10-3, the span of the constant b is 2000~3500.
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Cited By (6)
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| CN108345569A (en) * | 2018-02-07 | 2018-07-31 | 中国电力科学研究院有限公司 | A kind of method and system for calculating high voltage direct current conducting wire bloom field strength |
| CN108362926A (en) * | 2018-01-10 | 2018-08-03 | 云南电网有限责任公司电力科学研究院 | A kind of voltage class recognition methods and device |
| CN110307897A (en) * | 2019-06-26 | 2019-10-08 | 中国电力科学研究院有限公司 | A kind of hvdc transmission line uses audible noise when molded line to determine method and device |
| CN112130040A (en) * | 2020-09-24 | 2020-12-25 | 华北电力大学（保定） | Method for predicting field intensity of split conductor corona onset of power transmission line under plateau rain condition |
| CN112147431A (en) * | 2020-08-24 | 2020-12-29 | 中国电力科学研究院有限公司 | Noise determination method and system for strong influence of communication equipment on power transmission conductor field |
| CN113109638A (en) * | 2021-04-20 | 2021-07-13 | 中国电力科学研究院有限公司 | Audible noise sound power prediction method for alternating current transmission line in high-altitude area |
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| CN102735325B (en) * | 2012-06-06 | 2014-07-23 | 中国电力科学研究院 | Audible noise calculating method for high-voltage direct current electric transmission line |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108362926A (en) * | 2018-01-10 | 2018-08-03 | 云南电网有限责任公司电力科学研究院 | A kind of voltage class recognition methods and device |
| CN108345569A (en) * | 2018-02-07 | 2018-07-31 | 中国电力科学研究院有限公司 | A kind of method and system for calculating high voltage direct current conducting wire bloom field strength |
| CN108345569B (en) * | 2018-02-07 | 2023-04-18 | 中国电力科学研究院有限公司 | Method and system for calculating high-voltage direct-current lead corona starting field intensity |
| CN110307897A (en) * | 2019-06-26 | 2019-10-08 | 中国电力科学研究院有限公司 | A kind of hvdc transmission line uses audible noise when molded line to determine method and device |
| CN110307897B (en) * | 2019-06-26 | 2021-11-16 | 中国电力科学研究院有限公司 | Audible noise determination method and device for high-voltage direct current line adopting molded line |
| CN112147431A (en) * | 2020-08-24 | 2020-12-29 | 中国电力科学研究院有限公司 | Noise determination method and system for strong influence of communication equipment on power transmission conductor field |
| CN112147431B (en) * | 2020-08-24 | 2023-04-25 | 中国电力科学研究院有限公司 | Method and system for determining noise of influence of communication equipment on field intensity of power transmission wire |
| CN112130040A (en) * | 2020-09-24 | 2020-12-25 | 华北电力大学（保定） | Method for predicting field intensity of split conductor corona onset of power transmission line under plateau rain condition |
| CN112130040B (en) * | 2020-09-24 | 2023-10-13 | 电力规划总院有限公司 | Method for predicting corona-rising field intensity of split conductor of power transmission line under highland rain condition |
| CN113109638A (en) * | 2021-04-20 | 2021-07-13 | 中国电力科学研究院有限公司 | Audible noise sound power prediction method for alternating current transmission line in high-altitude area |
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