CN101888064A - Transformer substation main connection system based on medium frequency quenching transformer - Google Patents
Transformer substation main connection system based on medium frequency quenching transformer Download PDFInfo
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- CN101888064A CN101888064A CN 201010208152 CN201010208152A CN101888064A CN 101888064 A CN101888064 A CN 101888064A CN 201010208152 CN201010208152 CN 201010208152 CN 201010208152 A CN201010208152 A CN 201010208152A CN 101888064 A CN101888064 A CN 101888064A
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- circuit breaker
- load tap
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Abstract
The invention discloses a transformer substation main connection system based on a medium frequency quenching transformer, which is characterized by mainly comprising a medium frequency quenching on-load tap changing transformer T1, a medium frequency quenching on-load tap changing transformer T2, a circuit breaker D1, a circuit breaker D3 and a circuit breaker D2, wherein the circuit breaker D1 and the circuit breaker D3 are respectively connected with the medium frequency quenching on-load tap changing transformer T1 and the medium frequency quenching on-load tap changing transformer T2; the circuit breaker D2 is connected between a connecting point of the medium frequency quenching on-load tap changing transformer T1 and the circuit breaker D1 and a connecting point of the medium frequency quenching on-load tap changing transformer T2 and the circuit breaker D3, and an isolating switch DM is connected between the input end of the circuit breaker D1 and the input end of the circuit breaker D3. Meanwhile, the neutral points of the medium frequency quenching on-load tap changing transformer T1 and the medium frequency quenching on-load tap changing transformer T2 are both in graded insulation. The total quantity of devices and equipment adopted by the invention is obviously smaller than that of the devices and equipment in the prior art. The invention not only has simple overall structure and stable operation, but also has obviously 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 mid frequency induction hardening transformer.
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.Therefore, transformer station is that outwards of transmission of electric energy must be through the place in power plant (water conservancy power plant or firepower electrical plant).
At present, in the electric substation of the most frequently used 110KV, the reason that influences the normal electricity consumption of people is a lot, wherein topmost is exactly that choosing 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 owing to choosing of the mode of connection, the way of output and the transformer of transformer station's main electrical scheme is unreasonable cause the load equipment voltage of electric substation's end inferior, 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 mid frequency induction hardening transformer in useful life.
Purpose of the present invention is achieved through the following technical solutions: based on the transformer substation main connection system of mid frequency induction hardening transformer, mainly by mid frequency induction hardening on-load tap-changing transformer T1, mid frequency induction hardening on-load tap-changing transformer T2, circuit breaker D1 and the circuit breaker D3 that is connected with mid frequency induction hardening on-load tap-changing transformer T2 with mid frequency induction hardening on-load tap-changing transformer T1 respectively, and the circuit breaker D2 that is connected between the tie point of the tie point of mid frequency induction hardening on-load tap-changing transformer T1 and circuit breaker D1 and mid frequency induction hardening on-load tap-changing transformer T2 and circuit breaker D3 forms, and between the input of circuit breaker D1 and circuit breaker D3, also be connected with isolating switch DM, simultaneously, the neutral point of described mid frequency induction hardening on-load tap-changing transformer T1 and mid frequency induction hardening on-load tap-changing transformer T2 is graded insulation.
In order better to realize the present invention, the wiring group of described mid frequency induction hardening on-load tap-changing transformer T1 and mid frequency induction hardening on-load tap-changing transformer T2 is Y
o/ Y/ Δ-12-11; It is the 110KV circuit breaker of LW29-126/315-40 that described circuit breaker D1, D2, D3 all adopt model; It is the 110KV isolating switch of GW4-126IIDW/1250-31.5 that described isolating switch DM adopts model.
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.
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 of the present invention preferentially adopts the mid frequency induction hardening on-load tap-changing transformer, and promptly transformer T1 is that mid frequency induction hardening on-load tap-changing transformer, transformer T2 are the mid frequency induction hardening on-load tap-changing transformer.
As shown in Figure 1, the input of described mid frequency induction hardening on-load tap-changing transformer T1 (former limit) is connected with the input in power station through circuit breaker D1, and the input of mid frequency induction hardening on-load tap-changing transformer T2 (former limit) also is connected with the input in power station through circuit breaker D3.Simultaneously, between the tie point (being the input of mid frequency induction hardening on-load tap-changing transformer T1 and the input of mid frequency induction hardening on-load tap-changing transformer T2) of the input of the tie point of mid frequency induction hardening on-load tap-changing transformer T1 and circuit breaker D1 and mid frequency induction hardening on-load tap-changing transformer T2 and circuit breaker D3, also be connected with circuit breaker D2, and form an internal bridge by circuit breaker D1, short-circuiting device D2 and circuit breaker D3.Between the input of circuit breaker D1 and circuit breaker D3, also be connected with isolating switch DM.Consider the result of use of actual cost and actual time, the wiring group of described mid frequency induction hardening on-load tap-changing transformer T1 and mid frequency induction hardening on-load tap-changing transformer T2 is 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.
It is the 110KV circuit breaker of LW29-126/315-40 that described circuit breaker D1, circuit breaker D2, circuit breaker D3 all adopt model, and it is the 110KV isolating switch of GW4-126IIDW/1250-31.5 that isolating switch DM then adopts 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 mid frequency induction hardening on-load tap-changing transformer T1 and mid frequency induction hardening on-load tap-changing transformer T2, the neutral point of this mid frequency induction hardening on-load tap-changing transformer T1 and mid frequency induction hardening on-load tap-changing 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 is to guarantee the reliably insulation over the ground of mid frequency induction hardening on-load tap-changing transformer T1 and mid frequency induction hardening on-load tap-changing transformer T2, simultaneously, on mid frequency induction hardening on-load tap-changing transformer T1 and mid frequency induction hardening on-load tap-changing transformer T2, be equipped with lightning arrester.
During output (secondary) external load of mid frequency induction hardening on-load tap-changing transformer T1 of the present invention and T2, its structure as shown in Figure 2, an output (secondary) that is mid frequency induction hardening on-load tap-changing transformer T1 is drawn power supply buses as the 35KV power supply together through the output (secondary) of circuit breaker DR and mid frequency induction hardening on-load tap-changing transformer T2 after circuit breaker DR, and another output (secondary) of mid frequency induction hardening on-load tap-changing transformer T1 is drawn power supply buses as the 10KV power supply together through another output (secondary) of circuit breaker DR and mid frequency induction hardening on-load tap-changing transformer T2 after circuit breaker DR.According to actual needs, under each bus, can add a certain amount of load end, as long as the total capacity of its load end is no more than the total capacity of every bus.
As mentioned above, just can well realize the present invention.
Claims (4)
1. based on the transformer substation main connection system of mid frequency induction hardening transformer, it is characterized in that: mainly by mid frequency induction hardening on-load tap-changing transformer T1, mid frequency induction hardening on-load tap-changing transformer T2, circuit breaker D1 and the circuit breaker D3 that is connected with mid frequency induction hardening on-load tap-changing transformer T2 with mid frequency induction hardening on-load tap-changing transformer T1 respectively, and the circuit breaker D2 that is connected between the tie point of the tie point of mid frequency induction hardening on-load tap-changing transformer T1 and circuit breaker D1 and mid frequency induction hardening on-load tap-changing transformer T2 and circuit breaker D3 forms, and between the input of circuit breaker D1 and circuit breaker D3, also be connected with isolating switch DM, simultaneously, the neutral point of described mid frequency induction hardening on-load tap-changing transformer T1 and mid frequency induction hardening on-load tap-changing transformer T2 is graded insulation.
2. the transformer substation main connection system based on the mid frequency induction hardening transformer according to claim 1 is characterized in that: the wiring group of described mid frequency induction hardening on-load tap-changing transformer T1 and mid frequency induction hardening on-load tap-changing transformer T2 is Y
o/ Y/ Δ-12-11.
3. the transformer substation main connection system based on the mid frequency induction hardening transformer according to claim 1 and 2 is characterized in that: it is the 110KV circuit breaker of LW29-126/315-40 that described circuit breaker D1, D2, D3 all adopt model.
4. the transformer substation main connection system based on the mid frequency induction hardening transformer according to claim 1 and 2 is characterized in that: it is the 110KV isolating switch of GW4-126IIDW/1250-31.5 that described isolating switch DM adopts model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010208152 CN101888064A (en) | 2009-12-11 | 2010-06-11 | Transformer substation main connection system based on medium frequency quenching transformer |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910216700 | 2009-12-11 | ||
| CN200910216700.3 | 2009-12-11 | ||
| CN 201010208152 CN101888064A (en) | 2009-12-11 | 2010-06-11 | Transformer substation main connection system based on medium frequency quenching transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101888064A true CN101888064A (en) | 2010-11-17 |
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ID=43073841
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010208152 Pending CN101888064A (en) | 2009-12-11 | 2010-06-11 | Transformer substation main connection system based on medium frequency quenching transformer |
| CN2010202347216U Expired - Fee Related CN201699326U (en) | 2009-12-11 | 2010-06-11 | Substation main wiring system based on intermediate-frequency quenching transformer |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202347216U Expired - Fee Related CN201699326U (en) | 2009-12-11 | 2010-06-11 | Substation main wiring system based on intermediate-frequency quenching transformer |
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| CN (2) | CN101888064A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101888064A (en) * | 2009-12-11 | 2010-11-17 | 成都高新区尼玛电子产品外观设计工作室 | Transformer substation main connection system based on medium frequency quenching transformer |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2436515A1 (en) * | 1978-09-12 | 1980-04-11 | G P Izysk | HV switchgear for transformer coupling to several power lines - has two load switches for separate connection to each transmission line |
| US6118257A (en) * | 1997-11-24 | 2000-09-12 | Gec Alsthom T & D Sa | Switchgear for a power station generator and a transformer with a three-position disconnector |
| CN201219177Y (en) * | 2008-06-11 | 2009-04-08 | 中国石油辽阳石油化纤公司 | Low-voltage distribution main konode system |
| CN201286016Y (en) * | 2008-10-28 | 2009-08-05 | 西安电力高等专科学校 | Voltage passive control apparatus |
| CN201699326U (en) * | 2009-12-11 | 2011-01-05 | 成都高新区尼玛电子产品外观设计工作室 | Substation main wiring system based on intermediate-frequency quenching transformer |
-
2010
- 2010-06-11 CN CN 201010208152 patent/CN101888064A/en active Pending
- 2010-06-11 CN CN2010202347216U patent/CN201699326U/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2436515A1 (en) * | 1978-09-12 | 1980-04-11 | G P Izysk | HV switchgear for transformer coupling to several power lines - has two load switches for separate connection to each transmission line |
| US6118257A (en) * | 1997-11-24 | 2000-09-12 | Gec Alsthom T & D Sa | Switchgear for a power station generator and a transformer with a three-position disconnector |
| CN201219177Y (en) * | 2008-06-11 | 2009-04-08 | 中国石油辽阳石油化纤公司 | Low-voltage distribution main konode system |
| CN201286016Y (en) * | 2008-10-28 | 2009-08-05 | 西安电力高等专科学校 | Voltage passive control apparatus |
| CN201699326U (en) * | 2009-12-11 | 2011-01-05 | 成都高新区尼玛电子产品外观设计工作室 | Substation main wiring system based on intermediate-frequency quenching transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN201699326U (en) | 2011-01-05 |
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Application publication date: 20101117 |