CN101872939A - Transformer substation main wiring system based on main and transfer busbar - Google Patents
Transformer substation main wiring system based on main and transfer busbar Download PDFInfo
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- CN101872939A CN101872939A CN201010208168A CN201010208168A CN101872939A CN 101872939 A CN101872939 A CN 101872939A CN 201010208168 A CN201010208168 A CN 201010208168A CN 201010208168 A CN201010208168 A CN 201010208168A CN 101872939 A CN101872939 A CN 101872939A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The invention discloses a transformer substation main wiring system based on a main and transfer busbar, mainly consisting of a transformer T1, a transformer T2, a breaker D1 and a breaker D2, wherein the breaker D1 and the breaker D2 are respectively connected with the primary sides of the transformer T1 and the transformer T2. The transformer substation main wiring system is characterized by also comprising a main open circuit unit consisting of a breaker D3, a breaker D4 and a breaker D5 which are connected to each other in parallel, one end of the main open circuit unit is respectively connected with the breaker D1 and the breaker D2, and the other end of the main open circuit unit forms a terminal connected with a high-voltage circuit. In addition, the transformer T1 and the transformer T2 both adopt middle frequency induction hardening on-load regulating transformetap changers. The total amount of devices and equipment adopted in the invention is obviously less than the total amount of devices and equipment in the prior art, and the invention has the advantages of simple integral structure, stable operation and remarkably reduced cost.
Description
Technical field
The present invention relates to a kind of electric power supply system, specifically be meant the transformer substation main connection system that is used for electric substation based on the bypass of single busbar connection band.
Background technology
Transformer station is the flow direction of voltage of transformation in the electric power system, acceptance and distribution electric energy, control electric power and the electric power facility of adjusting voltage, and it gets up by the grid contact of its transformer with each step voltage.The stand equipment of voltage of transformation effect of power transformation is transformer; in addition; the equipment of transformer station opens and closes the switchgear of circuit in addition, compiles the bus of electric current, metering and control instrument transformer, instrument, protective relaying device and lightning protection device, dispatching communication apparatus etc.
At present, in the electric substation of the most frequently used 110KV, the reason that influences the normal electricity consumption of people is more, wherein topmost is exactly that selecting for use of transformer station's main electrical scheme mode of connection, the way of output and the transformer that are adopted is reasonable inadequately, cause line loss very big, and then making that the equipment voltage that is in electric substation's end is inferior, quality of voltage is defective, seriously influences the useful life of equipment.
Summary of the invention
The objective of the invention is to overcome at present cause the load equipment voltage of electric substation's end inferior owing to transformer station's main electrical scheme is unreasonable, quality of voltage is defective, have a strong impact on the defective in load equipment life-span, provide a kind of not only rational in infrastructure, and can effectively improve the load equipment working voltage and prolong the load equipment transformer substation main connection system based on the bypass of single busbar connection band in useful life.
Purpose of the present invention is achieved through the following technical solutions: based on the transformer substation main connection system of single busbar connection band bypass, mainly by transformer T1, transformer T2, and circuit breaker D1 that is connected with the former limit of transformer T1 and transformer T2 respectively and circuit breaker D2 composition, this system also comprises by circuit breaker D3, circuit breaker D4 and the circuit breaker D5 main breaking units that forms parallel with one another, and an end of this main breaking units is connected with circuit breaker D2 with circuit breaker D1 respectively, and the other end then forms the terminals that are connected with high-tension line; Simultaneously, described transformer T1 and transformer T2 all adopt the mid frequency induction hardening on-load tap-changing transformer.
Further, the wiring group of described transformer T1 and transformer T2 is Y
o/ Y/ Δ-12-11 in order to prevent thunderbolt, also is provided with zinc oxide arrester simultaneously on every transformer T1 and transformer T2.
In order better to realize the present invention, it is the 110KV circuit breaker of LW29-126/315-40 that described circuit breaker D1, circuit breaker D2, circuit breaker D3, circuit breaker D4 and circuit breaker D5 all adopt model, and the neutral point of described transformer T1 and transformer T2 is a graded insulation, and also is parallel with Electric capacity compensation device on the secondary bus of transformer T1 and transformer T2.
The present invention compared with prior art has the following advantages and beneficial effect:
(1) total quantity of device of the present invention and equipment is starkly lower than the total quantity of one type of prior art syringe and equipment, and not only overall structure is simple, stable, and its cost obviously reduces.
(2) transformer of the present invention all adopts the mid frequency induction hardening on-load tap-changing transformer, this kind transformer can not only be adjusted voltage by on-load in the rated capacity scope, and its range of regulation is big, can effectively reduce and avoid voltage to fluctuate widely, therefore can guarantee end load quality of voltage stable of transformer.
(3) because bus of the present invention has hospital bus bar, therefore when wherein any bus broke down, the present invention just can enable another bussed supply automatically, and needn't cut off the power supply.
Description of drawings
Fig. 1 is an overall structure schematic diagram of the present invention.
The overall structure schematic diagram of Fig. 2 during for bringing onto load of the present invention.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment
In the input-output equipment of all transformer stations, transformer has conclusive effect, the most frequently used transformer of people can be divided into two kinds in on-load tap-changing transformer No-load changer transformer at present, because on-load tap-changing transformer can be adjusted voltage by on-load in the rated capacity scope, range of regulation is big, can reduce and avoid voltage to fluctuate widely, and the No-load changer transformer can only change tap joint position when having a power failure, influence power supply reliability, the output quality of power supply is relatively poor.Therefore, transformer T1 of the present invention, transformer T2 all adopt the mid frequency induction hardening on-load tap-changing transformer.
As shown in Figure 1, the former limit of described transformer T1 is connected with the end of circuit breaker D1, and the former limit of transformer T2 then is connected with the end of circuit breaker D2.In order to ensure the safety of control, also be connected with main breaking units at the other end of circuit breaker D1 and circuit breaker D2.
This main breaking units is by three models and parallel with one another the forming of all identical circuit breaker of performance, promptly be connected in parallel by bus L between circuit breaker D3 as shown in the figure, circuit breaker D4 and the circuit breaker D5, and the end after its parallel connection is connected with circuit breaker D2 with circuit breaker D1 respectively, the other end then forms terminals, is connected with the 110KV AC power that draw in the power station.
Consider the result of use of actual cost and actual time, it is SFSZ7-31500/110 that described transformer T1 and transformer T2 all adopt model, wiring group Yo/Y/ Δ-12-11, range of regulation is: 110 ± 8*1.5%/38.5 ± 5%/10.5, each coil volume ratio is: 31500/31500/31500 mid frequency induction hardening transformer.It is the 110KV circuit breaker of LW29-126/315-40 that described circuit breaker D1, circuit breaker D2, circuit breaker D3, circuit breaker D4 and circuit breaker D5 all adopt model.
In use, electric equipment is in operation and bears outside the operating voltage, also usually can suffer superpotential effect, and as the overvoltage that thunder and lightning causes, its numerical value as not taking measures, will make insulation be damaged considerably beyond operating voltage, shorten service life of equipment.Therefore, safe in utilization in order to ensure transformer T1 and transformer T2, the neutral point of this transformer T1 and transformer T2 is adopted as graded insulation, be that the transformer neutral point insulation level is more much lower than phase line end, the 110K transformer neutral point class of insulation is the 35KV electric pressure, thus neutral point should install additional lightning arrester or the protection gap protection should satisfy following requirement to the neutral point lightning arrester: its impulse sparkover voltage should be lower than the impulse withstand voltage of transformer neutral point; The voltage stabilizing value U (U=0.6UXG) that the neutral point current potential that its extinguishing voltage should cause greater than the electrical network single-phase earthing raises simultaneously, is equipped with lightning arrester to guarantee the reliably insulation over the ground of transformer T1 and transformer T2 on transformer T1 and transformer T2.
Select lightning arrester for use, should use the rated voltage of lightning arrester identical with the voltage class of electric power system that this lightning arrester is installed, and the highest power-frequency voltage that the extinguishing voltage that makes lightning arrester may occur greater than its installation place working bus bar, the power-frequency sparkover voltage of lightning arrester should be greater than 1.8 times of extinguishing voltage.Therefore in the present invention, this lightning arrester adopts zinc oxide arrester.This zinc oxide arrester has the following advantages: (1) no gap; (2) no afterflow; (3) the suffered overvoltage of electric equipment can reduce; (4) discharge capacity is big; (5) voltage-current characteristic is smooth, residual voltage is low, does not produce and dams.
During the secondary external load of transformer T1 of the present invention and T2, its structure as shown in Figure 2, a secondary that is transformer T1 is drawn power supply buses as the 35KV power supply together through the secondary of circuit breaker DR and transformer T2 after circuit breaker DR, and another secondary of transformer T1 is drawn power supply buses as the 10KV power supply together through another secondary of circuit breaker DR and transformer T2 after circuit breaker DR.
For the operating quality of power supply of raising system, reduce active loss, improve power factor, need compensate, regulate system.According to the rules regulation, parallel condenser compensation device generally is located at the 10KV side, and its capacity can be considered by 10%～30% of main transformer rated capacity, when selecting, selecting capacity for use is two of 3600KVAR compensation arrangements, is divided into two groups by star-star connection, is connected on respectively on the bus of 10KV.In order better to realize the present invention, it is the Electric capacity compensation device of TBB 1-3600 that this Electric capacity compensation device adopts model.
For guaranteeing the person and device security, suitable ground connection of electric equipment or connecting to neutral, for electric equipment ground connection with various different voltages, should use a total earthing device, voltage to earth was evenly distributed near the artificial earth electrode of electric equipment should make the electric equipment site as far as possible, electric equipment at earth short circuit current, must install Ring earth electrode, and install equal pressure zone additional transformer, the base of electrical equipment and shell, the instrument transformer secondary winding, the metal screening hurdle of the metal of power distribution equipment and reinforced concrete frame and close live part and metallic door etc. all are the ground connection scopes outside the room.The present invention is arranged as earthing device as required: earthing device system constitutes earthing device as vertical junction terrain and-60 * 6 band steels as the horizontal grounding body by the angle steel of L50 * 5, long 2.5M, buries dark multitudinous 0.8 meter underground; Earth rod is buried one underground every 6M, and is linked to be ring-type with one 60 * 6 band steels; Shaft tower, metal architecture, electric equipment metal shell etc., operating mechanism, electric equipment working earthing etc. all need to locate ground connection, and its branch's lead-in wire all adopts ￠ 16 round steel to draw ground except that working earthing, and its extraction location should be provided with the most nearby by the distance grounding apparatus; The earth connection of underground cable ditch adopts one 60 * 6 band steels to be connected with cable bearer, and centre and termination are connected with main ground network, and outdoor overground cable support is connected with ground network with ￠ 16 round steel; The total earth resistance of earthing device should be no more than 0.5, otherwise increases earth rod, and extremely total earth resistance is not more than till 0.5.
As mentioned above, just can well realize the present invention.
Claims (5)
1. based on the transformer substation main connection system of single busbar connection band bypass, mainly by transformer T1, transformer T2, and circuit breaker D1 that is connected with the former limit of transformer T1 and transformer T2 respectively and circuit breaker D2 composition, it is characterized in that: this system also comprises by circuit breaker D3, circuit breaker D4 and the circuit breaker D5 main breaking units that forms parallel with one another, and an end of this main breaking units is connected with circuit breaker D2 with circuit breaker D1 respectively, and the other end then forms the terminals that are connected with high-tension line; Simultaneously, described transformer T1 and transformer T2 all adopt the mid frequency induction hardening on-load tap-changing transformer.
2. the transformer substation main connection system based on the bypass of single busbar connection band according to claim 1 is characterized in that: the wiring group of described transformer T1 and transformer T2 is Y
o/ Y/ Δ-12-11.
3. the transformer substation main connection system based on the bypass of single busbar connection band according to claim 1 is characterized in that: also be provided with zinc oxide arrester on every transformer T1 and transformer T2.
4. according to the transformer substation main connection system of each described single busbar connection band bypass of claim 1～3, it is characterized in that: it is the 110KV circuit breaker of LW29-126/315-40 that described circuit breaker D1, circuit breaker D2, circuit breaker D3, circuit breaker D4 and circuit breaker D5 all adopt model.
5. the transformer substation main connection system of single busbar connection band according to claim 4 bypass, it is characterized in that: the neutral point of described transformer T1 and transformer T2 is a graded insulation, and also is parallel with Electric capacity compensation device on the secondary bus of transformer T1 and transformer T2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010208168A CN101872939A (en) | 2009-12-11 | 2010-06-11 | Transformer substation main wiring system based on main and transfer busbar |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910216689 | 2009-12-11 | ||
| CN200910216689.0 | 2009-12-11 | ||
| CN201010208168A CN101872939A (en) | 2009-12-11 | 2010-06-11 | Transformer substation main wiring system based on main and transfer busbar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101872939A true CN101872939A (en) | 2010-10-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010208168A Pending CN101872939A (en) | 2009-12-11 | 2010-06-11 | Transformer substation main wiring system based on main and transfer busbar |
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| CN (1) | CN101872939A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104701747A (en) * | 2015-03-18 | 2015-06-10 | 榆林学院 | Single busbar sectioned PT automatically splitting paralleling entrance system and implementation method |
-
2010
- 2010-06-11 CN CN201010208168A patent/CN101872939A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104701747A (en) * | 2015-03-18 | 2015-06-10 | 榆林学院 | Single busbar sectioned PT automatically splitting paralleling entrance system and implementation method |
| CN104701747B (en) * | 2015-03-18 | 2016-09-14 | 榆林学院 | Sectionalized single busbar connection PT divides row juxtaposed inlet system and implementation method automatically |
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Application publication date: 20101027 |