CN101834410A - Shock-proof reinforced reforming method for existing transformer substation bus equipment system - Google Patents
Shock-proof reinforced reforming method for existing transformer substation bus equipment system Download PDFInfo
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- CN101834410A CN101834410A CN201010175634A CN201010175634A CN101834410A CN 101834410 A CN101834410 A CN 101834410A CN 201010175634 A CN201010175634 A CN 201010175634A CN 201010175634 A CN201010175634 A CN 201010175634A CN 101834410 A CN101834410 A CN 101834410A
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Abstract
The invention discloses a shock-proof reinforced reforming method for an existing transformer substation bus equipment system. The method comprises the following steps: measuring the natural vibration frequency of equipment in a group of bus connection equipment systems in a transformer substation, finding out the intermediate frequency of the equipment frequencies, and adjusting the frequencies of the group of the equipment to be close to the intermediate frequency; and the method for adjusting the equipment frequency is as follows: reforming the structural form of the bottom base of the equipment to ensure the frequency of the whole equipment-base to be close to the intermediate frequency of the group of the equipment. The invention has the advantages of convenient operation, low manufacturing cost, obvious effect and the like, can be widely applied to the shock-proof reinforced reforming of the existing transformer substation and the design of a newly built transformer substation, and can effectively avoid the adverse interaction between electrical equipment and the bus.
Description
Technical field
The present invention relates to the seismic hardening remodeling method that a kind of existing substation bus bar connects electric equipment.
Background technology
After the earthquake, rebuild rapidly after the rapid conveying of the disaster relief supplies of the existence of life line system after and the calamity and have great importance earthquake, wherein very important life line system is an electric power distribution system, it almost is distributed in each place, be dwelling house, hospital, factory and other mechanism distribute electric energy.Yet in the earthquake in recent years, transformer station has demonstrated the anti-seismic performance of its fragility, and the key event of electric power distribution system antidetonation is the anti-seismic performance of substation equipment fragility.Although its rehabilitation expense only accounts for the sub-fraction of whole earthquake reconstruction expenses, the indirect loss that the electric power system inefficacy causes is huge.
A typical transformer station comprises a whole set of and uses the interconnective equipment of bus, for example: circuit breaker, lightning arrester, capacitor, isolating switch etc.Because the different characteristic of these equipment, under geological process, can produce different horizontal displacements, if the relative displacement of equipment room is bigger, and the connection flexibility of these equipment rooms is when not enough, equipment room can produce very strong interaction.Shake back field investigation shows that the interaction between substation equipment is the reason that damages in the earthquake.Yet, the domestic research that mainly concentrates on the equipment monomer about the research of substation equipment anti-seismic performance at present.The seismic response of estimating bus connection electric equipment is the comparison difficulty, and reason is: 1, can not analyze separately equipment because of interactional existence.2, connector is non-linear.3, earthquake motion essence is at random, shakes by several chosen places and carries out deterministic parsing and may get the wrong sow by the ear.
For fear of disadvantageous dynamic interaction between bus and electric equipment, the foreign scholar proposes to increase the slackness of bus to increase the feasible value of equipment room relative displacement.Jean-Bernard Dastous in 2004, Andre Filiatrault etc. show by test, under high slackness, and the influence that interconnective equipment is connected hardly.Yet under lower slackness, even under lower amplitude, equipment room also can produce nonlinear interaction clearly.Therefore, the lead of equipment room must possess enough slacknesses, equipment is exerted an influence because lacking slackness to stop.
Because the requirement of electric insulation, bus and ground, bus and equipment room need satisfy certain insulation distance, so the slackness of bus cannot increase arbitrarily.In order to address this problem, this paper proposes improves one's methods is that seat structure form by changing electric equipment is adjusted into the frequency of one group of equipment more approaching, thereby reduced the difference of device structure characteristic and the relative displacement of equipment room, avoided because equipment that bigger relative displacement causes between electric equipment and the interaction between bus.
Summary of the invention
Disadvantageous interaction between soft bus and electric equipment under the geological process the present invention proposes a kind of seismic hardening remodeling method of easy to operate, cheap, the existing substation bus bar connection device of obvious results system.
Under the geological process, the displacement response difference of the electric equipment of different structure characteristic.The displacement of substation equipment under geological process mainly is the function of the equipment natural frequency of vibration, and when two device frequencies that connect when bus were close, the relative displacement between them was less, and the interaction of bus and both sides equipment room is less.Therefore reduce the frequency-splitting that bus connects two side apparatus, make that the displacement response of two side apparatus is comparatively approaching under the geological process, the relative displacement of equipment room is less, thereby can avoid disadvantageous dynamic interaction between equipment and bus.
The seismic hardening remodeling method of the existing transformer substation bus equipment system that the present invention proposes, concrete steps are as follows:
For one group of electric equipment that adopts bus to connect in the transformer station, electric equipment is made of electric equipment body and electric equipment lower seat usually, described electric equipment body such as isolating switch, current transformer and circuit breaker etc., be mainly used in and satisfy the electric function requirement, the electric equipment lower seat is mainly used in and supports top electric equipment body, guarantees that there is certain insulation distance on itself and ground.Employing artificial excitation's free vibration method obtains the natural frequency of vibration of each electric equipment in one group of electric equipment, the natural frequency of vibration to these electric equipments is averaged, calculate intermediate frequency, the frequency of electric equipment is adjusted to the intermediate frequency difference is controlled in the 1.5Hz; The frequency adjustment of electric equipment can change the frequency of electric equipment integral body by the frequency that changes the electric equipment lower seat.
Among the present invention, the frequency shift mode that is arranged in each electric equipment lower seat adopt the sectional dimension size that changes the seat structure form, changes bearing or increase diagonal brace etc. any, change the frequency of electric equipment body-bearing integral body.The change of electric equipment bearing does not influence the electric function of electric equipment, and cost is relatively low.
Among the present invention, the frequency shift mode of electric equipment integral body adopts the reforming mode of calculation Design electric equipment bearing.
Among the present invention, the frequency difference that reduces one group of electric equipment that connects with bus is avoided the dynamic interaction between equipment and bus.
The natural frequency of vibration of electric equipment is comprehensively to be determined by the natural frequency of vibration of the natural frequency of vibration of each electric equipment bearing and each electric equipment body.Because the dynamic characteristics of electric equipment body (not comprising bearing) is just determined after the equipment typing is produced, can not be changed.And the rigidity of equipment-support system integral body is to be connected with the rigidity of apparatus body by the rigidity of bearing to obtain, the rigidity of bearing is big more, and then the integral rigidity of equipment-support system is also big more, otherwise, bearing rigidity is more little, and the integral rigidity of equipment-support system is also more little.The quality of equipment support changes the frequency size that also can influence entire equipment-support system.Frequency by the rigidity and the quality of adjustment electric equipment bearing are adjusted electric equipment body-support system makes equipment integral frequency and intermediate frequency difference in 1.5Hz.
In order to make process improved equipment integral frequency of bearing and intermediate frequency difference in 1.5Hz, need carry out calculation Design to seat structure according to the natural frequency of vibration of apparatus body, reach target frequency with the frequency that guarantees adjusted apparatus body-support system.
In order to change the version of electric equipment bearing, several different methods is arranged: as bearing is changed into the annular steel column by the Space Angle bridle iron; Can change the sectional dimension of bearing, as changing the diameter and the wall thickness of annular steel column; The method that also can set up diagonal brace increases rigidity of bearing etc.
Compared with prior art, the beneficial effect of patent of the present invention, be not change to satisfy electric function electric equipment body, the equipment support relatively low to cost carries out simple structure of modification, come the frequency of adjustment equipment-support system, make that the frequency of equipment room is comparatively approaching in the equipment system that one group of bus connects, relative displacement is less, thereby has avoided because the dynamic interaction that the equipment room relative displacement causes more greatly.Construction is convenient in the present invention, and is workable, cheap; The expense of electric equipment bearing accounts for the very little part of entire equipment cost, and is economical and practical; Can effectively change the frequency of entire equipment-support system by the frequency that changes the electric equipment bearing, effect is remarkable.
Description of drawings
Fig. 1 is common substation bus bar connection device structural diagrams.
Fig. 2 is the seat structure diagram of equipment.
Fig. 3 is for adjusting the seat structure diagram of improved equipment.
Fig. 4 is adjusted substation bus bar connection device structural diagrams.
Number in the figure: 1 is isolating switch, and 2 is soft bus, and 3 is current transformer, and 4 is circuit breaker, and 5 is the former bearing of isolating switch, and 6 is the former bearing of current transformer, and 7 is the former bearing of circuit breaker, and 8 are isolating switch transformation rear support, and 9 is that circuit breaker is transformed rear support.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
Embodiment 1: in a certain outlet at interval of transformer station isolating switch-current transformer-the circuit breaker connected system as shown in Figure 1.The horizontal loading that applies a certain size at the equipment top makes equipment integral produce displacement, removes this load then suddenly, can obtain the natural frequency of vibration of electric equipment body and apparatus body-bearing integral body by the structural response of measuring equipment and equipment support.If obtain the natural frequency of vibration of isolating switch, current transformer and three equipment of circuit breaker is respectively by said method: 5Hz, 3Hz, 1Hz.The natural frequency of vibration of selected current transformer is an intermediate frequency, the frequency of isolating switch is adjusted between the 3Hz-4.5Hz scope, and as far as possible near 3Hz; The frequency of circuit breaker is adjusted between the 1.5Hz-3Hz scope, and as far as possible near 3Hz.
In order to adjust the frequency of isolating switch and circuit breaker, need the bearing of reforming equipment bottom.Calculate the version of the bearing of equipment when obtaining device frequency and being target frequency by the basic mechanical principle.Former bearing of isolating switch and the former bearing of circuit breaker as shown in Figure 2, improved isolating switch and circuit breaker bearing are as shown in Figure 3.
In the site operation, at first, the soft bus between isolating switch summation current transformer, current transformer and circuit breaker is removed, recorded the natural frequency of vibration of equipment by artificial excitation's method according to the structural response of single devices; Then, remove isolating switch and the body of circuit breaker and the coupling part of bearing, the electric equipment body of isolating switch and circuit breaker is deposited.The 3rd, the bearing of isolating switch is replaced by transformation rear support 8 by former bearing 5, the bearing of circuit breaker is replaced by by former bearing 7 transforms rear support 9.The 4th, the equipment that removes before is reinstalled on the new bearing, improved device frequency is carried out the second time measure, check whether reach the target frequency value, if do not reach, need recomputate the replacing bearing, till the equipment integral frequency satisfies target frequency.At the isolating switch summation current transformer, soft bus is installed between current transformer and circuit breaker at last.New bus connection device system is because the difference of equipment room is less, under the geological process relative displacement less, avoided the disadvantageous interaction between bus and electric equipment.
Claims (4)
1. the seismic hardening remodeling method of an existing transformer substation bus equipment system is characterized in that concrete steps are as follows:
For one group of electric equipment that adopts bus to connect in the transformer station, this electric equipment is made of electric equipment body and electric equipment lower seat, described electric equipment is used to satisfy the electric function requirement, the electric equipment lower seat is used to support top electric equipment body, guarantees that there is certain insulation distance on itself and ground; Employing artificial excitation's free vibration method obtains the natural frequency of vibration of each electric equipment in one group of electric equipment, the natural frequency of vibration to these electric equipments is averaged, calculate intermediate frequency, the frequency of each electric equipment is adjusted to the intermediate frequency difference is controlled in the 1.5Hz; The frequency adjustment of each electric equipment can change the frequency of electric equipment integral body by the frequency that change is positioned at the bearing of each electric equipment bottom.
2. the seismic hardening remodeling method of existing transformer substation bus equipment system according to claim 1, the frequency shift mode that it is characterized in that being arranged in each electric equipment lower seat adopt the sectional dimension size that changes the seat structure form, changes bearing or increase diagonal brace any.
3. the seismic hardening remodeling method of existing transformer substation bus equipment system according to claim 1, the frequency shift mode that it is characterized in that electric equipment integral body adopts the reforming mode of calculation Design electric equipment bearing.
4. the seismic hardening remodeling method of existing transformer substation bus equipment system according to claim 1, the frequency difference that it is characterized in that reducing one group of electric equipment that connects with bus is avoided the dynamic interaction between equipment and bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101756342A CN101834410B (en) | 2010-05-13 | 2010-05-13 | Shock-proof reinforced reforming method for existing transformer substation bus equipment system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101756342A CN101834410B (en) | 2010-05-13 | 2010-05-13 | Shock-proof reinforced reforming method for existing transformer substation bus equipment system |
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| Publication Number | Publication Date |
|---|---|
| CN101834410A true CN101834410A (en) | 2010-09-15 |
| CN101834410B CN101834410B (en) | 2012-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101756342A Expired - Fee Related CN101834410B (en) | 2010-05-13 | 2010-05-13 | Shock-proof reinforced reforming method for existing transformer substation bus equipment system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105735732A (en) * | 2016-03-17 | 2016-07-06 | 同济大学 | Rigidity-adjustable energy dissipation and damping support for extra-high voltage transformation equipment and application thereof |
| CN106021730A (en) * | 2016-05-20 | 2016-10-12 | 武汉理工大学 | Method for calculating self-vibration frequency of suspension type bus based on ANSY |
-
2010
- 2010-05-13 CN CN2010101756342A patent/CN101834410B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105735732A (en) * | 2016-03-17 | 2016-07-06 | 同济大学 | Rigidity-adjustable energy dissipation and damping support for extra-high voltage transformation equipment and application thereof |
| CN106021730A (en) * | 2016-05-20 | 2016-10-12 | 武汉理工大学 | Method for calculating self-vibration frequency of suspension type bus based on ANSY |
| CN106021730B (en) * | 2016-05-20 | 2019-05-10 | 武汉理工大学 | A kind of calculation method of the suspension type bus natural frequency of vibration based on ANSYS |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101834410B (en) | 2012-01-25 |
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