CN205911810U - Electric system for generating set in power plant - Google Patents
Electric system for generating set in power plant Download PDFInfo
- Publication number
- CN205911810U CN205911810U CN201620634563.0U CN201620634563U CN205911810U CN 205911810 U CN205911810 U CN 205911810U CN 201620634563 U CN201620634563 U CN 201620634563U CN 205911810 U CN205911810 U CN 205911810U
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
-
- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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- Stand-By Power Supply Arrangements (AREA)
Abstract
The utility model provides a set up isolator on 2 low tension side branch generating lines respectively of electric system for generating set in power plant, at the spare transformer to insert the 2nd circulating water pump transformer on the 3A section house generating line of no. 3 units. The utility model provides high 4 generator operation's of group reliabilities are guaranteed when taking place the 500kV circuit full cut -off condition, and the circulating water pump omnibus system can normal operating, and the full factory omnibus system that relates to no. 3 units and no. 4 units simultaneously can obtain resumeing as early as possible.
Description
Technical field
The utility model is related to generating set electrical system in a kind of power plant.
Background technology
Lv Si port genco 4 generating sets of one phase are 660mw ultra supercritical steam turbine generating set, as shown in figure 1, all
Employ generator-main transformer unit connection, wherein No. 1 unit is accessed in factory by the first HV Auxiliary Transformer 101
500kv bus, No. 2 units access 500kv bus in factory by the second HV Auxiliary Transformer 102, and No. 3 units pass through the 3rd height
Pressure house transformer 103 accesses 220kv bus in factory, and No. 4 units are accessed in factory by the 4th HV Auxiliary Transformer 104
220kv bus, the normal working power of 4 units passes through HV Auxiliary Transformer from corresponding 500kv or 220kv bus respectively
The offer of falling power transmission.4 units share 1 spare transformer 3 as shutting down stand-by power supply, and this spare transformer 3 accesses in factory
500kv bus.First HV Auxiliary Transformer 101 and the second HV Auxiliary Transformer 102 comprise 1 transformer with split winding respectively
(capacity is 50/28-28mva) and 1 two-fold transformer (capacity is 28mva), the 3rd HV Auxiliary Transformer 103 and the 4th is high
Pressure house transformer 104 comprises 1 transformer with split winding (capacity is 50/28-28mva) respectively, and spare transformer 3 comprises 1 point
Fission depressor (capacity is 50/28-28mva), transformer neutral point is grounded.The 6kv auxiliary bus bar of No. 1 unit is divided into 1a, 1b, 1c
Three sections, correspond to 3 low-pressure side windings of the first HV Auxiliary Transformer 101 respectively, the 6kv auxiliary bus bar of No. 2 units be divided into 2a,
Tri- sections of 2b, 2c, corresponds to 3 low-pressure side windings of the second HV Auxiliary Transformer 102 respectively, and the 6kv auxiliary bus bar of No. 3 units divides
For two sections of 3a, 3b, correspond respectively to 2 low-pressure side windings of the 3rd HV Auxiliary Transformer 103, the 6kv station-service of No. 4 units is female
Line is divided into two sections of 4a, 4b, corresponds respectively to 2 low-pressure side windings of the 4th HV Auxiliary Transformer 104, and spare transformer 3 has
There are 2 low-pressure side branch bars, the corresponding 1a section connecting No. 1 unit of one of low-pressure side branch bar, 1c section, No. 2 units
1a section, the 1a section of 1c section, the 1a section of No. 3 units and No. 4 units, another low-pressure side branch bar is corresponding to connect No. 1 unit
1b section, the 4b section of the 2b section of No. 2 units, the 3b section of No. 3 units and No. 4 units.The power supply of the sharing system in power plant is even
It is connected between the 1c section bus of No. 1 unit and the 2c section bus of No. 2 units, first circulation water pump transformer 201 accesses No. 1 unit
1c section bus, second circulation water pump transformer 202 access No. 2 units 2c section bus.
According to current electrical system connection type, when 500kv circuit hinders for some reason or electrical network adjustment faces power failure,
The 6kv auxiliary bus bar of No. 1 unit and No. 2 units will be lost the job power supply and standby incoming power, and due to being total in power plant
It is connected between the 1c section bus of No. 1 unit and the 2c section bus of No. 2 units with the power supply overwhelming majority of system, first circulation water
Pump transformer 201 and second circulation water pump transformer 202 also will lose power supply, directly result in power supply and be derived from 380v circulating pump room
The 1-4 unit circulating cooling water pump forced outage of transformer bus section, water circulating pump cooling water interrupts, and full factory water circulating pump is jumped
Lock, ultimately causes No. 3 units and No. 4 units are forced to stop transport.In addition, remaining the synergic system load in addition to circulating pump room
Break period surpasses and also will threaten the safe operation of 3, No. 4 units within more than 1 hour it is therefore necessary to recover public in a short period of time
Use system power supply.And no breaker or isolation knife between spare transformer 3 low-pressure side branch bar and spare transformer low-pressure side
The breakpoints such as lock, therefore, such as need to recover the power supply of No. 1 unit and No. 2 unit 6kv c section buses it is necessary to will be low for spare transformer 3
Being flexible coupling of side of pressure is untied, and then realizes No. 3 units and the 6kv power supply of No. 4 units delivers to No. 1 unit and No. 2 unit 6kv c sections
The purpose of bus, process time of entirely taking out stitches is longer, and is affected larger by weather, and 6kv system recovery time is slower.
Utility model content
The utility model provides generating set electrical system in a kind of power plant, improves what 4 groups of generating sets ran
Reliability is it is ensured that when there is 500kv circuit full cut-off situation, water circulating pump synergic system can normally be run, and is related to No. 3 simultaneously
The full factory synergic system of unit and No. 4 units can be restored as early as possible.
In order to achieve the above object, the utility model provides generating set electrical system in a kind of power plant, comprises:
No. 1 unit, it passes through the first HV Auxiliary Transformer and accesses 500kv bus in factory, and No. 1 unit has 1a, 1b, 1c
Three sections of 6kv auxiliary bus bars, are connected respectively 3 low-pressure side windings of the first HV Auxiliary Transformer；
No. 2 units, it passes through the second HV Auxiliary Transformer and accesses 500kv bus in factory, and No. 2 units have 2a, 2b, 2c
Three sections of 6kv auxiliary bus bars, are connected respectively 3 low-pressure side windings of the second HV Auxiliary Transformer；
No. 3 units, it passes through the 3rd HV Auxiliary Transformer and accesses 220kv bus in factory, and No. 3 units have 3a, 3b two
Section 6kv auxiliary bus bar, is connected respectively 2 low-pressure side windings of the 3rd HV Auxiliary Transformer；
No. 4 units, it passes through the 4th HV Auxiliary Transformer and accesses 220kv bus in factory, and No. 4 units have 4a, 4b two
Section 6kv auxiliary bus bar, is connected respectively 2 low-pressure side windings of the 4th HV Auxiliary Transformer；
Spare transformer, it accesses 500kv bus in factory, and spare transformer has 2 low-pressure side branch bars, and wherein one
The corresponding 1a section auxiliary bus bar connecting No. 1 unit of individual low-pressure side branch bar, 1c section auxiliary bus bar, the 1a section station-service of No. 2 units
Bus, the 1a section auxiliary bus bar of 1c section auxiliary bus bar, the 1a section auxiliary bus bar of No. 3 units and No. 4 units, another low-pressure side is divided
The corresponding 1b section auxiliary bus bar connecting No. 1 unit of branch bus, the 2b section auxiliary bus bar of No. 2 units, the 3b section station-service mother of No. 3 units
The 4b section auxiliary bus bar of line and No. 4 units, 2 low-pressure side branch bars of this spare transformer are respectively provided with disconnecting switch；
First circulation water pump transformer, it accesses the 1c section auxiliary bus bar of No. 1 unit；
Second circulation water pump transformer, it accesses the 3a section auxiliary bus bar of No. 3 units.
The low-pressure side branch bar of described spare transformer adopts all insulation to pour into a mould bus pattern.
The disconnecting switch of described spare transformer is in closing position in the case of normal power supply.
The disconnecting switch of described spare transformer adopts handcart-type switch.
The utility model improves 4 groups of generating set reliabilities of operation it is ensured that there is 500kv circuit full cut-off situation
When, water circulating pump synergic system can normally be run, and be related to No. 3 units simultaneously and the full factory synergic system of No. 4 units can be use up
It is restored soon.
Brief description
Fig. 1 is the schematic diagram of generating set electrical system in power plant in background technology.
Fig. 2 is the schematic diagram of generating set electrical system in a kind of power plant that the utility model provides.
Specific embodiment
Below according to Fig. 2, illustrate preferred embodiment of the present utility model.
As shown in Fig. 2 the utility model provides generating set electrical system in a kind of power plant, comprise:
No. 1 unit, it accesses 500kv bus in factory by the first HV Auxiliary Transformer 101, No. 1 unit have 1a,
Tri- sections of 6kv auxiliary bus bars of 1b, 1c, are connected respectively 3 low-pressure side windings of the first HV Auxiliary Transformer 101；
No. 2 units, it accesses 500kv bus in factory by the second HV Auxiliary Transformer 102, No. 2 units have 2a,
Tri- sections of 6kv auxiliary bus bars of 2b, 2c, are connected respectively 3 low-pressure side windings of the second HV Auxiliary Transformer 102；
No. 3 units, it accesses 220kv bus in factory by the 3rd HV Auxiliary Transformer 103, and No. 3 units have 3a, 3b
Two sections of 6kv auxiliary bus bars, are connected respectively 2 low-pressure side windings of the 3rd HV Auxiliary Transformer 103；
No. 4 units, it accesses 220kv bus in factory by the 4th HV Auxiliary Transformer 104, and No. 4 units have 4a, 4b
Two sections of 6kv auxiliary bus bars, are connected respectively 2 low-pressure side windings of the 4th HV Auxiliary Transformer 104；
Spare transformer 3, it accesses 500kv bus in factory, and spare transformer 3 has 2 low-pressure side branch bars, wherein
The 1a section auxiliary bus bar of one low-pressure side branch bar No. 1 unit of corresponding connection, 1c section auxiliary bus bar, the 1a section factory of No. 2 units
With the 1a section auxiliary bus bar of bus, 1c section auxiliary bus bar, the 1a section auxiliary bus bar of No. 3 units and No. 4 units, another low-pressure side
The corresponding 1b section auxiliary bus bar connecting No. 1 unit of branch bar, the 2b section auxiliary bus bar of No. 2 units, the 3b section station-service of No. 3 units
The 4b section auxiliary bus bar of bus and No. 4 units, low-pressure side branch bar adopts all insulation to pour into a mould bus pattern, this spare transformer
It is respectively provided with disconnecting switch 4, this disconnecting switch 4 is in closing position in the case of normal power supply on 32 low-pressure side branch bars
Put, in the present embodiment, low-pressure side branch bar overall length is about 40 meters, rated current is 3150a, disconnecting switch 4 adopts handcart-type
Switch, switching voltage grade is 10kv, and rated current is 4000a, the function such as a configuration distant place shows, remote operation；
First circulation water pump transformer 201, it accesses the 1c section auxiliary bus bar of No. 1 unit；
Second circulation water pump transformer 202, it accesses the 3a section auxiliary bus bar of No. 3 units.
After second circulation water pump transformer 202 Power supply alteration finishes, by the fortune of Reasonable adjustment water circulating pump cooling water pump
Line mode, makes first circulation water pump transformer 201 and second circulation water pump transformer 202 respectively carry a part of cooling water pump to run,
Under this method of operation, even if 500kv system burst power outage, still ensure that No. 3 units and No. 4 unit water circulating pumps are normal
Run, so that it is guaranteed that No. 3 units and No. 4 unit reliability services.
After the completion of spare transformer low-pressure side branch bar being carried out install disconnecting switch transformation additional, have a power failure when 500kv happens suddenly
During accident, operations staff can shorten the operating time to greatest extent, through confirmation after can be by spare transformer low-pressure side branch
Disconnecting switch on bus disconnects, then according to actual conditions, disconnecting switch will be closed a floodgate, and the 6kv of No. 3 units and No. 4 units is female
The 2c section bussed supply through the 6kv 1c bus to No. 1 unit for the spare transformer low-pressure side branch bar and No. 2 units for the line, recovers
Full factory synergic system is powered.
The utility model improves 4 groups of generating set reliabilities of operation it is ensured that there is 500kv circuit full cut-off situation
When, water circulating pump synergic system can normally be run, and be related to No. 3 units simultaneously and the full factory synergic system of No. 4 units can be use up
It is restored soon.
Although content of the present utility model has been made to be discussed in detail by above preferred embodiment, but it should be appreciated that on
The description stated is not considered as to restriction of the present utility model.After those skilled in the art have read the above, for
Multiple modifications and substitutions of the present utility model all will be apparent from.Therefore, protection domain of the present utility model should be by appended
Claim limiting.
Claims (4)
1. in a kind of power plant generating set electrical system it is characterised in that comprising:
No. 1 unit, it accesses 500kv bus in factory by the first HV Auxiliary Transformer (101), No. 1 unit have 1a, 1b,
Tri- sections of 6kv auxiliary bus bars of 1c, are connected respectively 3 low-pressure side windings of the first HV Auxiliary Transformer (101)；
No. 2 units, it accesses 500kv bus in factory by the second HV Auxiliary Transformer (102), No. 2 units have 2a, 2b,
Tri- sections of 6kv auxiliary bus bars of 2c, are connected respectively 3 low-pressure side windings of the second HV Auxiliary Transformer (102)；
No. 3 units, it passes through the 3rd HV Auxiliary Transformer (103) and accesses 220kv bus in factory, and No. 3 units have 3a, 3b two
Section 6kv auxiliary bus bar, is connected respectively 2 low-pressure side windings of the 3rd HV Auxiliary Transformer (103)；
No. 4 units, it passes through the 4th HV Auxiliary Transformer (104) and accesses 220kv bus in factory, and No. 4 units have 4a, 4b two
Section 6kv auxiliary bus bar, is connected respectively 2 low-pressure side windings of the 4th HV Auxiliary Transformer (104)；
Spare transformer (3), it accesses 500kv bus in factory, and spare transformer (3) has 2 low-pressure side branch bars, wherein
The 1a section auxiliary bus bar of one low-pressure side branch bar No. 1 unit of corresponding connection, 1c section auxiliary bus bar, the 1a section factory of No. 2 units
With the 1a section auxiliary bus bar of bus, 1c section auxiliary bus bar, the 1a section auxiliary bus bar of No. 3 units and No. 4 units, another low-pressure side
The corresponding 1b section auxiliary bus bar connecting No. 1 unit of branch bar, the 2b section auxiliary bus bar of No. 2 units, the 3b section station-service of No. 3 units
The 4b section auxiliary bus bar of bus and No. 4 units, 2 low-pressure side branch bars of this spare transformer (3) are respectively provided with isolation
Switch (4)；
First circulation water pump transformer (201), it accesses the 1c section auxiliary bus bar of No. 1 unit；
Second circulation water pump transformer (202), it accesses the 3a section auxiliary bus bar of No. 3 units.
2. in power plant as claimed in claim 1 generating set electrical system it is characterised in that described spare transformer
(3) low-pressure side branch bar adopts all insulation to pour into a mould bus pattern.
3. in power plant as claimed in claim 1 generating set electrical system it is characterised in that described spare transformer
(3) disconnecting switch (4) is in closing position in the case of normal power supply.
4. in power plant as claimed in claim 1 generating set electrical system it is characterised in that described spare transformer
(3) disconnecting switch (4) adopts handcart-type switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620634563.0U CN205911810U (en) | 2016-06-24 | 2016-06-24 | Electric system for generating set in power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620634563.0U CN205911810U (en) | 2016-06-24 | 2016-06-24 | Electric system for generating set in power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205911810U true CN205911810U (en) | 2017-01-25 |
Family
ID=57812504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620634563.0U Expired - Fee Related CN205911810U (en) | 2016-06-24 | 2016-06-24 | Electric system for generating set in power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205911810U (en) |
-
2016
- 2016-06-24 CN CN201620634563.0U patent/CN205911810U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170125 Termination date: 20210624 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |