CN209658908U - A kind of power plant neighbour machine HV auxiliary power s ystem is mutually for system - Google Patents
A kind of power plant neighbour machine HV auxiliary power s ystem is mutually for system Download PDFInfo
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Abstract
The utility model provides a kind of power plant neighbour machine HV auxiliary power s ystem mutually for system, and structure is simple, can effectively improve unit HV auxiliary power s ystem security of system, economy and flexibility.It includes station-service the first inter-bay B1, station-service the second inter-bay B2, and at least two generating sets；Every generating set includes a generator, a main transformer, Liang Taigao factory transformer and four sections of auxiliary bus bars；Generator accesses power grid through outlet breaker and main transformer；The input terminal of every Tai Gao factory transformer is connected between outlet breaker and main transformer, and output end is correspondingly connected with two sections of auxiliary bus bars through incoming breaker respectively；Two sections of auxiliary bus bars for connecting same Tai Gao factory transformer connect station-service the first inter-bay B1 and the second inter-bay of station-service B2 through back-up breaker respectively；The connection of four sections of auxiliary bus bars and station-service the first inter-bay B1 and the second inter-bay of station-service B2 in every generating set is all the same.
Description
Technical field
The utility model belongs to adjacent machine HV auxiliary power s ystem mutually for field, and specially a kind of power plant neighbour machine HV auxiliary power s ystem is mutual
For system.
Background technique
In the prior art, the G1 generator in power plant, G2 generator, G3 generator and G4 generator are all made of power generation
Machine-transformer-unit connection is respectively connected to 500kV power grid.
Every generating set sets 2 on-load voltage regulation type three winding transformer with split winding (one or two Ji Gao factory varying capacity 50/26-
26MVA, three No. four Ji Gao factory varying capacity 45/25-25MVA) and four sections of 6kV buses, that is, A, B, C, D sections.Machine furnace workload tap
On two sections of 6kV buses of B, D；Defeated coal section connects in 6kV bus A section, and desulfurization air compressor machine section and harbour section connect at C sections of 6kV bus.
It is connected between transformer and switchgear using common box bus.When system operates normally, the 6kV station-service electric load difference of every unit
Become by each self generator through high pressure factory and is powered.When 1 or several units need to overhaul, 6kV station-service electric load is by accordingly leading
Become the power supply of falling power transmission.
Some drawbacks will appear using this connection type in actual operation, when certain main transformer have maintenance task or
When failure exits, which will lose 6kV station service, will be unable to run so as to cause its important house-service equipment, substantially reduce
The safety of unit operation.
The main transformer electricity price of falling power transmission is higher than the cost of electricity-generating in power plant oneself, if power plant installed capacity is big, long operational time
A large amount of main transformer will be generated and fall power transmission, 6kV station-service electric load is by the main transformer power supply of falling power transmission during unit maintenance, and power transmission is every
Year consumption about 13,200,000 KW.h of average electricity, needs to pay to power grid according to every degree 0.5016 yuan/kwh of electricity, directly affects enterprise
Economic benefit, unit outage maintenance during it is especially prominent.
Utility model content
Aiming at the problems existing in the prior art, the utility model provides a kind of power plant neighbour machine HV auxiliary power s ystem mutually for being
System, structure is simple, can effectively improve unit HV auxiliary power s ystem security of system, economy and flexibility.
The utility model is to be achieved through the following technical solutions:
Mutually for system, including station-service the first inter-bay B1, station-service second is interconnected for a kind of power plant neighbour machine HV auxiliary power s ystem
Bus B2, and at least two generating sets；
Every generating set includes a generator, a main transformer, Liang Taigao factory transformer and four sections of auxiliary bus bars；
Generator accesses power grid through outlet breaker and main transformer；The input terminal of every Tai Gao factory transformer be connected to outlet breaker and
Between main transformer, output end is correspondingly connected with two sections of auxiliary bus bars through incoming breaker respectively；Connect same Tai Gao factory transformer
Two sections of auxiliary bus bars respectively through back-up breaker connect station-service the first inter-bay B1 and the second inter-bay of station-service B2；
Four sections of auxiliary bus bars and station-service the first inter-bay B1 and the second inter-bay of station-service B2 in every generating set
Connection it is all the same.
Preferably, high factory's transformer is on-load voltage regulation type three winding transformer with split winding.
Preferably, in power plant, machine furnace workload is tapped in four sections of auxiliary bus bars on two sections, two sections of auxiliary bus bars
Respectively by Liang Taigao factory transformer-supplied；Defeated coal section connects on remaining one section of auxiliary bus bar, desulfurization air compressor machine section and harbour Duan Jun
It connects on remaining another section of auxiliary bus bar.
Preferably, the power grid is 500kV power grid；Station-service the first inter-bay B1, station-service the second inter-bay B2, with
And four sections of auxiliary bus bars are 6kV bus.
Preferably, when any one maintenance for generation companies, the outlet breaker of generating set is overhauled in quartile, inlet wire is disconnected
Road device is in quartile, and back-up breaker is in coincidence；Any one unit in work generating set is as power generator；Power supply hair
The outlet breaker of motor group is in coincidence, and for incoming breaker in coincidence, two for connecting the first inter-bay of station-service B1 are spare disconnected
Road device in quartile and coincidence, connects two back-up breakers of the second inter-bay of station-service B2 respectively in quartile and coincidence respectively；
Power generator group is through being separately connected the spare open circuit of station-service the first inter-bay B1 and station-service the second inter-bay B2 and coincidence
Device to maintenance electric set electric supply.
Further, when the quantity for the generating set that works is greater than one, the outlet breaker of remaining non-power generator group
In coincidence, incoming breaker is in coincidence, and back-up breaker is in quartile.
Preferably, when all generating sets overhaul, in quartile, incoming breaker exists the outlet breaker of generating set
Coincidence, back-up breaker is in coincidence；Four sections of auxiliary bus bars fall power transmission by each unit main transformer by external power supply and are powered.
Compared with prior art, the utility model has technical effect beneficial below:
The utility model interconnects the station service of four units, is equivalent to every unit and increases 3 station service standby electricities
Source can be stoppage in transit unit by operating unit and the interconnection of stoppage in transit unit station service when main transformer overhauls task or failure is exited
Reliable maintenance power supply is provided, the flexibility and safety of unit high-voltage Auxiliary electric system are greatly improved.The utility model is direct
Using the power generation in power plant, cost is about 0.3 yuan/kwh；The outer power purchase of 13,200,000 KWh can be saved every year, and use cost is lower
Operating unit station service can at least reduce by 2,660,000 yuan of electric cost during unit maintenance every year, and economic benefit is obvious.
Detailed description of the invention
Fig. 1 is four unit 6kV station service communication charts described in the example of the utility model.
Fig. 2 is 6kV station service communication chart when four units described in the example of the utility model operate normally.
Fig. 3 is G1 unit maintenance described in the example of the utility model, 6kV station service communication chart when other units operate normally.
Fig. 4 is G1, G2 unit maintenance described in the example of the utility model, and 6kV station service is got in touch with when other units operate normally
Figure.
Fig. 5 is G1, G2, G3 unit maintenance described in the example of the utility model, and 6kV station service is got in touch with when G4 unit operates normally
Figure.
6kV station service communication chart when Fig. 6 is the maintenance of four machine sets described in the example of the utility model.
In figure: G1, G2, G3, G4 are generator；T1A, T1B, T2A, T2B, T3A, T3B, T4A, T4B are that high factory becomes
Depressor；T1, T2, T3, T4 are main transformer；801,802,803,804 be outlet breaker；61A, 61B, 61C, 61D,
62A, 62B, 62C, 62D, 63A, 63B, 63C, 63D, 64A, 64B, 64C, 64D are incoming breaker；061A, 061B, 061C,
061D, 062A, 062B, 062C, 062D, 063A, 063B, 063C, 063D, 064A, 064B, 064C, 064D are spare open circuit
Device；6kV station-service the first inter-bay B1,6kV the second inter-bay of station-service B2.
Specific embodiment
The following describes the utility model in further detail with reference to the accompanying drawings, it is described be the explanation to the utility model and
It is not to limit.
As shown in Figure 1, with a kind of power plant neighbour machine HV auxiliary power s ystem mutually for system, including G1 generator, G2 generator, G3
Generator, G4 generator, every generator are equipped with a main transformer and 2 Tai Gao factory transformers, respectively T1 main transformer, T2
Main transformer, T3 main transformer, T4 main transformer, T1A high factory transformer, T1B high factory transformer, T2A high factory transformer, T2B
High factory's transformer, T3A high factory transformer, T3B high factory transformer, T4A high factory transformer, T4B high factory transformer, the G1 power generation
Machine is connected by breaker 801 and T1 main transformer, T1A high factory transformer and T1B high factory transformer, and the T1A high factory becomes
Depressor by 61A, 61B breaker respectively with 6kV station service bus 1A, 1B sections be connected, 1A, 1B sections of the 6kV station service bus
It is connected for B1, B2 sections by 061A, 061B breaker with the first and second inter-bay of 6kV station-service respectively, T1B high factory transformer
By 61C, 61D breaker respectively with 6kV station service bus 1C, 1D sections be connected, 1C, 1D sections of difference of the 6kV station service bus
It is connected by 061C, 061D breaker with 6kV station-service second, B2, B1 sections of an inter-bay, the G2 generator passes through breaker
802 are connected with T2 main transformer, T2A high factory transformer and T2B high factory transformer, T2A high factory transformer by 62A,
62B breaker respectively with 6kV station service bus 2A, 2B sections be connected, 2A, 2B sections of the 6kV station service bus respectively by 062A,
062B breaker is connected with 6kV station-service second, B2, B1 sections of an inter-bay, and for T2B high factory transformer by 62C, 62D is disconnected
Road device respectively with 6kV station service bus 2C, 2D sections be connected, 2C, 2D sections of the 6kV station service bus respectively pass through 062C, 062D
Breaker is connected for B1, B2 sections with the first and second inter-bay of 6kV station-service, and the G3 generator passes through breaker 803 and T3 main transformer pressure
Device, T3A high factory transformer and T3B high factory transformer are connected, and T3A high factory transformer is distinguished by 63A, 63B breaker
Be connected for 3A, 3B sections with 6kV station service bus, 3A, 3B sections of the 6kV station service bus respectively by 063A, 063B breaker with
B1, B2 sections of the first and second inter-bay of 6kV station-service are connected, T3B high factory transformer by 63C, 63D breaker respectively with 6kV
3C, 3D sections of station service bus are connected, and 3C, 3D sections of the 6kV station service bus passes through 063C, 063D breaker and 6kV factory respectively
It is connected with B2, B1 sections of second, one inter-bay, the G4 generator is become by breaker 804 and T4 main transformer, T4A high factory
Depressor and T4B high factory transformer are connected, T4A high factory transformer by 64A, 64B breaker respectively with the 6kV station-service goddess of lightning
4A, 4B sections of line are connected, and 4A, 4B sections of the 6kV station service bus passes through 064A, 064B breaker and 6kV station-service second, one respectively
B2, B1 sections of inter-bay are connected, T4B high factory transformer by 64C, 64D breaker respectively with 6kV station service bus 1C,
1D sections are connected, and 4C, 4D sections of the 6kV station service bus is interconnected by 064C, 064D breaker and 6kV station-service first and second respectively
B1, B2 sections of bus are connected.
The working principle of the utility model is as follows:
When four units operate normally, as shown in Fig. 2, the 6kV service power of every unit is passed through by each self generator
High factory becomes power supply, and 801,802,803,804 outlet breakers are in coincidence；61A,61B,61C,61D,62A,62B,62C,62D,
63A, 63B, 63C, 63D, 64A, 64B, 64C, 64D incoming breaker are in coincidence；1A, 1B sections of 6kV station service bus is by T1A high factory
Become power supply, 1C, 1D section are become by T1B high factory and power, 2A, 2B section of 6kV station service bus by the change power supply of T2A high factory, 2C, 2D sections by
T2B high factory becomes power supply, and 3A, 3B sections of 6kV station service bus become power supply by T3A high factory, and 3C, 3D sections are powered by the change of T3B high factory, 6kV
4A, 4B sections of station service bus become power supply by T4A high factory, and 4C, 4D sections become power supply by T4B high factory.061A,061B,061C,061D,
062A, 062B, 062C, 062D, 063A, 063B, 063C, 063D, 064A, 064B, 064C, 064D, 6kV back-up breaker are dividing
Position.
One unit maintenance, as shown in figure 3, when other units operate normally (by taking G1 unit maintenance as an example), the inspection of G1 unit
It repairs, when other units operate normally, G1 unit 6kV station service is powered by G2 unit 6kV station service electrical system by inter-bay,
His unit 6kV station service is become by respectively high factory powers, and 801 outlet breakers are in quartile；802,803,804 outlet breakers are closing
Position；61A, 61B, 61C, 61D incoming breaker are in quartile；62A,62B,62C,62D,63A,63B,63C,63D,64A,64B,
The 6kV incoming breaker of 64C, 64D are in coincidence；061A, 061B, 061C, 061D, 062A, 062C back-up breaker are in coincidence；
The 6kV back-up breaker of 062B, 062D, 063A, 063B, 063C, 063D, 064A, 064B, 064C, 064D are in quartile.
Two unit maintenances, as shown in figure 4, when other units operate normally (by taking G1, G2 unit maintenance as an example), G1, G2
Unit maintenance, when other units operate normally.G1, G2 unit 6kV station service pass through interconnection by G3 unit 6kV station service electrical system
Bussed supply, other units 6kV station service become power supply by respectively high factory, and 801,802 outlet breakers are in quartile；803,804 go out
Mouth breaker is in coincidence；61A, 61B, 61C, 61D, 62A, 62B, 62C, 62D incoming breaker are in quartile；63A,63B,63C,
The 6kV incoming breaker of 63D, 64A, 64B, 64C, 64D are in coincidence；061A,061B,061C,061D,062A,062B,062C,
062D, 063A, 063C back-up breaker are in coincidence；The 6kV back-up breaker of 063B, 063D, 064A, 064B, 064C, 064D exist
Quartile.
Three unit maintenances, as shown in figure 5, when other units operate normally (by taking G1, G2, G3 unit as an example), G1, G2,
G3 unit maintenance, when other units operate normally.G1, G2, G3 unit 6kV service power are by G4 unit 6kV station service electrical system
It is powered by inter-bay, G4 unit 6kV station service becomes power supply by its high factory, and 801,802,803 outlet breakers are in quartile；
804 outlet breakers are in coincidence；61A, 61B, 61C, 61D, 62A, 62B, 62C, 62D, 63A, 63B, 63C, 63D incoming breaker
In quartile；The 6kV incoming breaker of 64A, 64B, 64C, 64D are in coincidence；061A,061B,061C,061D,062A,062B,
062C, 062D, 063A, 063B, 063C, 063D, 064A, 064C back-up breaker are in coincidence；The 6kV of 064B, 064D are spare disconnected
Road device is in quartile.
When four unit maintenances, as shown in fig. 6, powered by external power supply by each unit main transformer change of falling power transmission, G1, G2,
G3, G4 unit maintenance, 801,802,803,804 outlet breakers are in quartile；61A,61B,61C,61D,62A,62B,62C,
62D, 63A, 63B, 63C, 63D, 64A, 64B, 64C, 64D incoming breaker are in coincidence；061A,061B,061C,061D,062A,
The 6kV back-up breaker of 062B, 062C, 062D, 063A, 063B, 063C, 063D, 064A, 064B, 064C, 064D are in quartile.
Claims (7)
1. a kind of power plant neighbour machine HV auxiliary power s ystem is mutually for system, which is characterized in that including station-service the first inter-bay B1, station-service
Second inter-bay B2, and at least two generating sets；
Every generating set includes a generator, a main transformer, Liang Taigao factory transformer and four sections of auxiliary bus bars；Power generation
Machine accesses power grid through outlet breaker and main transformer；The input terminal of every Tai Gao factory transformer is connected to outlet breaker and main transformer
Between depressor, output end is correspondingly connected with two sections of auxiliary bus bars through incoming breaker respectively；Connect the two of same Tai Gao factory transformer
Section auxiliary bus bar connects station-service the first inter-bay B1 and the second inter-bay of station-service B2 through back-up breaker respectively；
The company of four sections of auxiliary bus bars and station-service the first inter-bay B1 and the second inter-bay of station-service B2 in every generating set
It connects all the same.
2. a kind of power plant neighbour machine HV auxiliary power s ystem according to claim 1 is mutually for system, which is characterized in that high factory's transformation
Device is on-load voltage regulation type three winding transformer with split winding.
3. a kind of power plant neighbour machine HV auxiliary power s ystem according to claim 1 is mutually for system, which is characterized in that power plant
In, machine furnace workload is tapped in four sections of auxiliary bus bars on two sections, and two sections of auxiliary bus bars are respectively by Liang Taigao factory transformer
Power supply；Defeated coal section connects on remaining one section of auxiliary bus bar, and desulfurization air compressor machine section and harbour Duan Jun connect in remaining another section of station-service
On bus.
4. a kind of power plant neighbour machine HV auxiliary power s ystem according to claim 1 is mutually for system, which is characterized in that the electricity
Net is 500kV power grid；Station-service the first inter-bay B1, station-service the second inter-bay B2 and four sections of auxiliary bus bars are 6kV mother
Line.
5. a kind of power plant neighbour machine HV auxiliary power s ystem according to claim 1 is mutually for system, which is characterized in that when any one
When platform maintenance for generation companies, the outlet breaker of generating set is overhauled in quartile, incoming breaker exists in quartile, back-up breaker
Coincidence；Any one unit in work generating set is as power generator；The outlet breaker of power generator group is closing
Position, incoming breaker connect two back-up breakers of the first inter-bay of station-service B1 respectively in quartile and coincidence, even in coincidence
Two back-up breakers of the second inter-bay of station-service B2 are connect respectively in quartile and coincidence；Power generator group is through being separately connected factory
With the first inter-bay B1 and station-service the second inter-bay B2 and the back-up breaker of coincidence is to maintenance electric set electric supply.
6. a kind of power plant neighbour machine HV auxiliary power s ystem according to claim 5 is mutually for system, which is characterized in that when work is sent out
When the quantity of motor group is greater than one, the outlet breaker of remaining non-power generator group in coincidence, incoming breaker in coincidence,
Back-up breaker is in quartile.
7. a kind of power plant neighbour machine HV auxiliary power s ystem according to claim 1 is mutually for system, which is characterized in that when all hairs
When motor group is overhauled, the outlet breaker of generating set is in quartile, and incoming breaker is in coincidence, and back-up breaker is in coincidence；
Four sections of auxiliary bus bars fall power transmission by each unit main transformer by external power supply and are powered.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111478425A (en) * | 2020-04-17 | 2020-07-31 | 齐鲁工业大学 | High-voltage station service power fast switching system, power supply system and method |
| CN112910004A (en) * | 2021-03-15 | 2021-06-04 | 大唐淮南洛河发电厂 | Method for synthesizing manual shutdown signal and accident shutdown signal of 600MW thermal generator set |
-
2019
- 2019-05-24 CN CN201920769592.1U patent/CN209658908U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111478425A (en) * | 2020-04-17 | 2020-07-31 | 齐鲁工业大学 | High-voltage station service power fast switching system, power supply system and method |
| CN111478425B (en) * | 2020-04-17 | 2021-07-30 | 齐鲁工业大学 | High-voltage station service power fast switching system, power supply system and method |
| CN112910004A (en) * | 2021-03-15 | 2021-06-04 | 大唐淮南洛河发电厂 | Method for synthesizing manual shutdown signal and accident shutdown signal of 600MW thermal generator set |
| CN112910004B (en) * | 2021-03-15 | 2024-02-02 | 大唐淮南洛河发电厂 | Method for synthesizing manual shutdown signal and accident shutdown signal of 600MW thermal generator set |
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