CN106991259A - Control the reactor noise selection method of outdoor substation site noise level - Google Patents

Abstract

The present invention relates to a kind of reactor noise selection method of control outdoor substation site noise level, comprise the following steps：A) initialize in reactor types, the transformer station at least provided with a reactor；B site noise control point) is determined according to each reactor distribution situation；C) noise level L during all reactor cooperations of calculating on the site noise control point_T；D L) is judged_TWhether L is met_T＜ L_S, L_SFor transformer station's site noise limit value, if so, then reactor noise type selecting is completed, if it is not, then changing after reactor types, return to step B).Compared with prior art, the present invention has the advantages that standardization, sequencing, workable, accuracy be high, strong applicability.

Description

Control the reactor noise selection method of outdoor substation site noise level

Technical field

The present invention relates to transformer station's site noise control and equipment for power transmission and distribution field of noise control, more particularly, to one kind control The reactor noise selection method of outdoor substation site noise level processed.

Background technology

The site noise of transformer station is to cause one of common cause of public's complaint, is also to be needed during transformer substation construction is run One of important environmental index of control.Substantial amounts of has been done to Noise measarement problem in the environmental protection research of conventional transformer station The technical measures of various control noise level are also taken in work, existing transformer station, but are focused mostly in research single measure Noise reduction.It is worth noting that at present in the PRACTICE OF DESIGN of transformer station, in terms of Noise Control Design majority be according to By lectotype selection and the rough design phase of experience, the Noise Control Design method with operability of quantization is not formed. Distance standardization, sequencing, accurately and reliably also there is a big difference for electric substation's Noise measarement and noise-reducing design target.It is used as power transformation The noise source stood, the noise type selecting (its noise level being considered in lectotype selection, provide its noise level limit) of equipment for power transmission and distribution It is still one of control most direct effective measures of boundary noise level.Reactor is as the important noise source in transformer station, in electricity The source noise level and noise (site noise) control of transformer station's boundary that anti-device type selecting is determined should be found out rationally between requiring Effective quantization control method.The effective ways of noise type selecting can effectively be carried out to reactor by also lacking at present.

The content of the invention

It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of simplicity, specification, can The control for Substation Design stage or acquisition phase reactor type selecting control transformer station site noise level of strong operability The reactor noise selection method of outdoor substation site noise level.

The purpose of the present invention can be achieved through the following technical solutions：

A kind of reactor noise selection method of control outdoor substation site noise level, comprises the following steps：

A) initialize in reactor types, the transformer station at least provided with a reactor；

B site noise control point) is determined according to each reactor distribution situation；

C) noise level L during all reactor cooperations of calculating on the site noise control point_T；

D L) is judged_TWhether L is met_T＜ L_S, L_SFor transformer station's site noise limit value, if so, then reactor noise type selecting is complete Into if it is not, then changing after reactor types, return to step B).

The step A) in, reactor types carry out initial according to the anti-device national standard of transforming plant or professional standard Change.

The site noise control point is noise highest position on transformer station border.

The step C) in, L_TCalculation formula be：

Wherein, n is reactor number of units, L_iThe noise produced for separate unit reactor on boundary Noise measarement point.

The L_iCalculated using reactor noisy segmentation attenuation model, be specially

Wherein, r_iFor the distance at site noise control point to the nearest side surface of reactor, S=2 (l+w) h, l, w and h points Not Wei reactor length and width and height.

Compared with prior art, the present invention has advantages below：

(1) the reactor selection method of existing control transformer station site noise level be mainly more rough empirical method and Can carry out acoustics simulation calculation checking reactor type selecting using large-scale numerical simulation software meet what site noise control was required Method.Compared with empirical method, there is no quantitative analysis the present invention overcomes empirical method and rely on the shortcoming of experience.It is imitative with numerical value True method is compared, and the present invention overcomes its technical requirements is too high, modeling is complicated, is difficult to the shortcoming applied in engineering.This hair Bright method can directly carry out quantitative estimation, method and step standardization, journey to the noise level at transformer station's site noise control point Sequence and workable.

(2) the inventive method is applicable not only to the situation of only separate unit reactor, is also applied for the feelings of many reactors Condition, including the existing part reactor of transformer station need to increase the situation of reactor, no matter the noise level of original each of reactor It is whether identical, it is applied widely.

(3) the inventive method directly can accurately estimate the noise level at transformer station's site noise control point, right The estimation precision of outdoor substation can meet the type selecting needs of reactor arrangement in engineering up to 3dB.

Brief description of the drawings

Fig. 1 is schematic flow sheet of the invention；

Fig. 2 is reactor noisy segmentation attenuation model schematic diagram；

Fig. 3 is arrangement schematic diagram of the reactor in transformer station in the present embodiment.

Embodiment

The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with technical solution of the present invention Premised on implemented, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to Following embodiments.

The present invention provides a kind of reactor noise type selecting by Substation Design stage or reactor acquisition phase to have Effect control transformer station site noise, and can sequencing, the reactance of the control outdoor substation site noise level of standardization application Device noise selection method.

By taking the reactor noise type selecting in certain 110kV transformer station as an example.The reactor arrangement schematic diagram of the transformer station is for example attached (downwards for the north to) shown in Fig. 3.Reactor north-south arranges that the width between the border of transformer station north-south is 72.5m.1# reactance The border 16.5m on the centre distance electric substation north of device, the center spacing between 1# reactors and 2# reactors is 18m, 2# reactance Centre-to-centre spacing is 18.5m between device and 3# reactors, and 3# reactors are apart from transformer station border 19.5m in the south.Need by reactance The site noise level of the noise type selecting control transformer station of device is no more than 55dB.As shown in figure 1, the outdoor change of the control of the present embodiment The reactor noise selection method of power station site noise level is specially：

A. reactor type first is selected to the limit value of reactor noise according to the national standard of the anti-device of transforming plant, should The noise level L of model reactor_N=75dB.

B. the principle of range noise source most nearby is appeared according to maximum noise, with reference to reactor in such as Fig. 3 in transformer station In arrangement, just to may occur in which highest noise at reactor on the border of the east, site noise control point will be set at the position, made an uproar Sound limit value L_S=55dB.

C. reactor appearance and size l × w × h=7 × 4 × 5m is pressed,Three reactors are apart from site noise The distance at control point is respectively r₁=13m, r₂=31m, r₃=49.5m, is calculated by using reactor noisy segmentation attenuation model, The noise L that three reactors are produced on boundary Noise measarement point is obtained as shown in Fig. 2 being calculated by formula (1)_i：

Wherein, r_iFor the distance at site noise control point to the nearest side surface of reactor, S=2 (l+w) h, l, w and h points Not Wei reactor length and width and height.

Noise respectively 65.1dB, 57.6dB and 53.5dB that then three reactors are produced on boundary Noise measarement point.

D. there are three reactors in transformer station, calculate when three reactors all work and made an uproar in transformer station's boundary by formula (2) Noise level L on acoustic control point_T：

Wherein, n is reactor number of units, L_iThe noise produced for separate unit reactor on boundary Noise measarement point.

Then L_T=10lg (10^65.1/10+10^57.6/10+10^53.5/10)=66.1dB.

E. by L_TWith L_SCompare.L_T=66.1dB ＞ L_S=55dB.Gravity treatment noise level is lower, L_NFor 60dB reactance Device, return to step C, D to E.Calculating the noise that three reactors produce on boundary Noise measarement point by formula (1) is respectively 50.1dB, 42.6dB and 38.5dB.Calculated by formula (2) when three reactors all work at transformer station's site noise control point On noise level L_T=51.1dB.Compare L_TWith L_S, L_T=51.1dB<L_S=55dB.The reactor that noise level is 60dB is selected, The requirement of site noise limit value and slightly allowance can be met, reactor type selecting is completed.

Preferred embodiment of the invention described in detail above.It should be appreciated that one of ordinary skill in the art without Need creative work just can make many modifications and variations according to the design of the present invention.Therefore, all technologies in the art Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea Technical scheme, all should be in the protection domain being defined in the patent claims.

Claims (5)

1. a kind of reactor noise selection method of control outdoor substation site noise level, it is characterised in that including following Step：

A) initialize in reactor types, the transformer station at least provided with a reactor；

B site noise control point) is determined according to each reactor distribution situation；

C) noise level L during all reactor cooperations of calculating on the site noise control point_T；

D L) is judged_TWhether L is met_T＜ L_S, L_SFor transformer station's site noise limit value, if so, then reactor noise type selecting is completed, if It is no, then change after reactor types, return to step B).

2. the reactor noise selection method of control outdoor substation site noise level according to claim 1, it is special Levy and be, the step A) in, reactor types are initialized according to the anti-device national standard of transforming plant or professional standard.

3. the reactor noise selection method of control outdoor substation site noise level according to claim 1, it is special Levy and be, the site noise control point is noise highest position on transformer station border.

4. the reactor noise selection method of control outdoor substation site noise level according to claim 1, it is special Levy and be, the step C) in, L_TCalculation formula be：

$L_T=10\lg \left(\underset{i=1}{\overset{n}{\&Sigma;}}{10}^{L_i/10}\right)$

Wherein, n is reactor number of units, L_iThe noise produced for separate unit reactor on boundary Noise measarement point.

5. the reactor noise selection method of control outdoor substation site noise level according to claim 4, it is special Levy and be, the L_iCalculated using reactor noisy segmentation attenuation model, be specially

$\left\{\begin{array}{c}{L}_i=L_N,r_i<\frac{h}{\mathrm{\&pi;}}\\ L_i=L_N-10\lg \frac{{\mathrm{\&pi;r}}_i}{h},\frac{h}{\mathrm{\&pi;}}<r_i<\frac{l+w}{\mathrm{\&pi;}}\\ L_i=\left(L_N-10\lg \frac{l+w}{h}\right)-\left(8-10\lg \frac{l+w}{h}\right)\frac{\lg \frac{{\mathrm{\&pi;r}}_i}{l+w}}{\lg \frac{\mathrm{\&pi;}\sqrt{S}}{l+w}},\frac{l+w}{\mathrm{\&pi;}}<r_i<\sqrt{S}\\ L_i\&ap;L_N-20\lg \left(r_i/\sqrt{S}\right)-8,r_i>\sqrt{S}\end{array}\right.$

Wherein, r_iFor the distance at site noise control point to the nearest side surface of reactor, S=2 (l+w) h, l, w and h is respectively The length and width and height of reactor.