CN207967945U - Middle pressure station service electrical system - Google Patents
Middle pressure station service electrical system Download PDFInfo
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- CN207967945U CN207967945U CN201820512956.3U CN201820512956U CN207967945U CN 207967945 U CN207967945 U CN 207967945U CN 201820512956 U CN201820512956 U CN 201820512956U CN 207967945 U CN207967945 U CN 207967945U
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Abstract
The utility model discloses pressing station service electrical system in one kind, including two units, respectively the first unit and the second unit, it is set in two sections for every unit and presses working bus bar, it is set for the first unit and the second unit and presses public busbar in two sections, the station-service working bus bar in different units is tapped, and interconnection switch is set for the first unit and the second unit；Public busbar will be pressed to be connected to respectively in two sections of every unit in two sections and press working bus bar, by one section in pressure working bus bar in the single-row configuration wind turbine of middle pressure station service electrical system all two sections of access, wherein, single-row configuration wind turbine is the important load in middle pressure station service electrical system, and the set reformation in middle pressure station service electrical system is connected to the middle pressure working bus bar of every unit；Every unit sets pressure-off sulphur busbar in one section, is connected to the station-service working bus bar section of the unit.For the utility model in middle pressure station service electrical system, full factory sets pressure-off sulphur busbar in two sections, is connected to station-service working bus bar section, is convenient for the independent operation management of desulphurization system.
Description
Technical field：
The utility model is related to power domain more particularly to middle pressure station service electrical system fields.
Background technology：
In the prior art, the middle pressure station service configuration of load situation of power plant is as follows：Electrically driven feed pump is priming pump, two machines
Group sets one altogether；Condensate pump, enclosed cooling water pump are two, and a fortune one is standby；The fortune one of coal pulverizer five is standby；Primary air fan is sent
Wind turbine, air-introduced machine are single-row configuration；Other loads such as subsidiary engine water circulating pump, air compressor machine, rainwater pump, rubber conveyer etc. are
Public load.
Primary air fan, pressure fan, air-introduced machine are single-row with postponing, from technological process, when unit operation, and single-row three
Big wind turbine needs overall startup, and indispensable, just to apparatus body and power supply reliability, more stringent requirements are proposed for this.To improve
Power supply reliability is needed single-row subsidiary engine centralized arrangement on the same middle pressure active section of unit, in this way in the event of another active section
When barrier, steam turbine load does not influence unit and completely sends out, and boiler also can not cause compressor emergency shutdown by the form of load shedding.
In the prior art, due to the unreasonable setting of middle pressure station service electrical system, it is not easy to the independent operation pipe of desulphurization system
Reason.
Utility model content：
The purpose of this utility model is to provide pressing station service electrical system in one kind, in middle pressure station service electrical system, full factory sets
Pressure-off sulphur busbar in two sections is connected to station-service working bus bar section, is convenient for the independent operation management of desulphurization system.
The utility model is implemented by following technical solution：
The utility model provides in one kind and pressing station service electrical system, including：
Two units, respectively the first unit and the second unit set in two sections for every unit and press working bus bar, are described
First unit and the second unit set and press public busbar in two sections, tap in the station-service working bus bar of different units, and are described two
Press public busbar that interconnection switch is respectively set in section；
Public busbar will be pressed to be connected to respectively in two sections of every unit in described two sections and press working bus bar, in described
The single-row configuration wind turbine of station service electrical system is pressed all to access one section in described two sections in pressure working bus bar, wherein described single-row
It is the important load in medium pressure station service electrical system to configure wind turbine, by the set reformation in medium pressure station service electrical system
It is connected to the middle pressure working bus bar of every unit；
Every unit sets pressure-off sulphur busbar in one section, is connected to the station-service working bus bar section of the unit.
Further, one is arranged in described the unit and plays standby transformer, the described standby symmetrical tap of transformer is in described
On the station-service working bus bar of the unit, first unit and the second unit are separately connected a Tai Gao factories transformer.
Further, the capacity of high factory's transformer is 55/37-37MVA.
Further, pressure working bus bar is divided into A section busbares of work and the B sections of busbares that work in described two sections.
Further, the single-row configuration wind turbine in medium pressure station service electrical system is connected to A sections of busbares of work；By described two
Public busbar is pressed to be respectively connected to B sections of busbares of work of first unit and the second unit in section.
Further, the single-row configuration wind turbine includes primary air fan, pressure fan and air-introduced machine.
The advantages of the utility model：
1, in middle pressure station service electrical system, full factory sets pressure-off sulphur busbar in two sections, is connected to station-service working bus bar section, is convenient for
The independent operation management of desulphurization system.
2, middle pressure common section is separately provided in full factory's public load, and single-row configuration wind turbine is uniformly connected in every A sections of unit
Working bus bar is pressed, the middle public busbar of pressure, which is connected in B of Unit section, presses working bus bar, the balancing the load after subsidiary engine can be kept single-row.
3, the setting of middle pressure common section strengthens the unit of unit, not reason convenient for being managed concentratedly to public load
One unit station service electrical system failure influences the normal operation of other units, to cooperation unit maintenance, shutdown and maintenance the machine
Auxiliary switchgear etc. belonging to group is more convenient.
Description of the drawings：
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, other drawings may also be obtained based on these drawings.
A kind of schematic diagram for middle pressure station service electrical system that Fig. 1 is provided by the utility model embodiment.
Specific implementation mode：
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts
The every other embodiment obtained, shall fall within the protection scope of the present invention.
Embodiment one
Fig. 1, which is shown in one kind that the utility model embodiment is provided, presses station service electrical system；As shown in Figure 1, embodiment
Station service electrical system is pressed during one offer is a kind of, including：
Two units, respectively the first unit 1 and the second unit 2 set in two sections for every unit and press working bus bar, wherein
First unit 1, which is arranged in two sections, presses working bus bar 10A, 10B, and the second unit 2, which is arranged in two sections, presses working bus bar 20A, 20B, is
First unit 1 and the second unit 2, which are set, presses public busbar 01A, 01B in two sections, wherein 01A is female quoted from work is pressed in the first unit 1
Line 10B, 01B press working bus bar 20B, public busbar 01A and public busbar 01B that interconnection switch is arranged quoted from the second unit 2.
Public busbar will be pressed to be connected to respectively in two sections of every unit in two sections and press working bus bar, by middle pressure station service electrical system
Whole one sections in described two sections of access in pressure working bus bar of single-row configuration wind turbine 3, wherein single-row configuration wind turbine is Zhong Ya factories
Set reformation in middle pressure station service electrical system is connected in two sections of every unit and presses work by the important load in electricity system
Make busbar.
Every unit sets pressure-off sulphur busbar in one section, is connected to the station-service working bus bar section of the unit.
Preferably, one standby transformer 6 is set in the unit, plays standby transformer 6 and symmetrically taps in the station-service of two units
On working bus bar 10A, 10B, 20A, 20B, the first unit 1 and the second unit 2 are separately connected a Tai Gao factories transformer 7.Play standby become
Depressor connects the power distribution equipment of 110kV.The capacity of high factory's transformer 7 is 55/37-37MVA.
Two units set 1 and play standby transformer, separate unit large capacity high-voltage Auxiliary point with capacity with the high factory's transformer of unit
The setting of fission depressor, can simplify auxiliary single-line diagram, reduce the accident rate of HV Auxiliary Transformer so that transformer Ground arrangement
It is simple clear.
Wherein, high factory's transformer 7 is that high-pressure system turns dedicated transformer of the low-pressure system for Auxiliary System in Power Plant.Unit transformer
Depressor is the transformer of unit productive power.The transformer of stand-by power supply is provided standby electricity depressor, has been equivalent to standby transformer
6。
Preferably, pressure working bus bar is divided into A section busbares of work and the B sections of busbares that work in two sections.
Preferably, the single-row configuration wind turbine in middle pressure station service electrical system is connected to A sections of busbares of work；It is public by being pressed in two sections
Busbar is respectively connected to B sections of busbares of work of two units.
Referring to Fig. 1,1 corresponding middle pressure working bus bar of the first unit is divided into 10B sections of busbares of 10A sections of busbares of work and work,
Second unit, 2 corresponding middle pressure working bus bar is respectively the 20B sections of busbares of 20A sections of busbares and work that work；Wherein, single-row configuration wind
Machine 3 is altogether 2 parts, is connected to 20A sections of busbares of 10A sections of busbares of work and work respectively；Wherein, 01A in the first unit 1 quoted from pressing
Working bus bar 10B, 01B press working bus bar 20B, public busbar 01A and public busbar 01B that contact is arranged quoted from the second unit 2
Switch and busbar 10.Public load 4 is altogether 2 parts, is connected to public 01A sections of busbar and public 01B sections of busbar respectively.
Specifically, in the present embodiment, the main transformer 5 of the first unit 1 and the second unit 2 selects 750MVA.First unit 1 and
Two units 2 are followed by through main transformer boosting to the power distribution equipment of 500kV.The generator of first unit 1 and the second unit 2 selects 660MW.
Wherein, the public load 4 in middle pressure station service electrical system is often referred to subsidiary engine water circulating pump, air compressor machine, rainwater pump, adhesive tape
Conveyer.
Wherein, the low pressure such as unit load is often referred to steam turbine load, six coal pulverizers and machine, stove becomes, dedusting becomes, air-cooled change are dry
Formula transformer.
Wherein, single-row configuration wind turbine 3 includes primary air fan, pressure fan and air-introduced machine.
Preferably, the outlet of first generator and the second generator is not provided with breaker.
Generator outlet does not install breaker so that A row external equipments arrangement is simple, reduces the whole of generator-transformer group
Body failure rate improves operational reliability, reduces power plant's investment.
Preferably, station-service voltage class use 10.5-0.4kV two-stages, by middle pressure busbar short-circuit level be limited in 40kA with
It is interior.
Based on the setting for pressing station service electrical system among the above, debugged, subsidiary engine is single-row with postponing, three big wind turbine of boiler by
Same active section, which draws, to be connect, and starting sequence is：Air-introduced machine is started first, is therewith pressure fan, and the pressure in burner hearth is made to keep flat
It weighs, primary air fan is started after purging.Continuous starting of this three big wind turbine on same active section is to entire middle pressure station service
System is an acid test, and by tightly calculating, indices have been satisfied by the requirement started, suitable when having accomplished to start
Freely with fast.Following table is the calculated value of busbar voltage level.
The load data that stage of modulating is charged according to Bu Lian power plant, except negative in the parts such as the grey field built and denitrating system low pressure
Outside lotus, be included in whole high-tension motors (contain desulphurization system) and low-voltage load, using shaft power method calculate rated loan condition,
75% load condition, the station service power consumption rate under 50% load condition and real data comparison are as follows：
| Calculate station service power consumption rate | Actual operating data | |
| 50% operating mode station service power consumption rate | 5.985% | 5.211% |
| 75% operating mode station service power consumption rate | 4.906% | 5.010% (65% operating mode) |
| Rated loan condition station service power consumption rate | 4.484% | 4.425% |
As can be seen from the above table, each stage index of the station service power consumption rate of field measurement reaches advanced level, declared working condition with
Difference very little between 50% operating mode, calculated value is fairly close with measured value, this is just being fully demonstrated acquired by minute design
Achievement.
Therefore, it according to above station service program analysis, the data information of carry calculation, especially field adjustable, can obtain
Go out to draw a conclusion：
1) unit load and public load separate, and have not only strengthened the unit of unit, but also can be concentrated to public load
Management presses the floor space of station-service work switchgear house, adapts to process system while improving unit operation reliability, in can reducing
The single-row design pattern of subsidiary engine.
2) middle pressure busbar short-circuit level can be limited within 40kA by station-service voltage using 10kV grades, save project investment
While reduce electric energy loss.
3) pressure station service electrical system load is uniform in a full set it can be seen from operation result, it is rapid, stable to start, entirely
Face reaches and has surmounted the target set up when design optimization.
The advantages of the utility model：
1, in middle pressure station service electrical system, full factory sets pressure-off sulphur busbar in two sections, is connected to station-service working bus bar section, is convenient for
The independent operation management of desulphurization system.
2, middle pressure common section is separately provided in full factory's public load, and single-row configuration wind turbine is uniformly connected to middle pressure working bus bar,
The middle public busbar of pressure is connected to middle pressure working bus bar, the balancing the load after subsidiary engine can be kept single-row.
3, the setting of middle pressure common section strengthens the unit of unit, not reason convenient for being managed concentratedly to public load
One unit station service electrical system failure influences the normal operation of other units, to cooperation unit maintenance, shutdown and maintenance the machine
Auxiliary switchgear etc. belonging to group is more convenient.
The above is only the preferred embodiments of the present utility model only, is not intended to limit the utility model, all in this practicality
Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model
Within the scope of shield.
Claims (6)
1. pressing station service electrical system in one kind, which is characterized in that including：
Two units, respectively the first unit and the second unit set in two sections for every unit and press working bus bar, are described first
Unit and the second unit set and press public busbar in two sections, tap in the station-service working bus bar of different units, and are in described two sections
Press public busbar that interconnection switch is respectively set；
Public busbar will be pressed to be connected to respectively in two sections of every unit in described two sections and press working bus bar, by medium pressure factory
The single-row configuration wind turbine of electricity system all accesses one section in pressure working bus bar in described two sections, wherein the single-row configuration
Wind turbine is the important load in medium pressure station service electrical system, and the set reformation in medium pressure station service electrical system is connected to
The middle pressure working bus bar of every unit；
Every unit sets pressure-off sulphur busbar in one section, is connected to the station-service working bus bar section of the unit.
2. middle pressure station service electrical system according to claim 1, which is characterized in that
One is arranged in described the unit and plays standby transformer, the described standby symmetrical tap of transformer is in the station-service work of described the unit
Make on busbar, first unit and the second unit are separately connected a Tai Gao factories transformer.
3. middle pressure station service electrical system according to claim 2, which is characterized in that the capacity of high factory's transformer is 55/
37-37MVA。
4. middle pressure station service electrical system according to claim 1, which is characterized in that press working bus bar to be divided into work in described two sections
Make B sections of busbares of A sections of busbares and work.
5. middle pressure station service electrical system according to claim 4, which is characterized in that by the list in medium pressure station service electrical system
Row configuration wind turbine is connected to A sections of busbares of work；Public busbar will be pressed to be respectively connected to first unit and the second machine in described two sections
B sections of busbares of work of group.
6. middle pressure station service electrical system according to claim 1, which is characterized in that the single-row configuration wind turbine includes First air
Machine, pressure fan and air-introduced machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820512956.3U CN207967945U (en) | 2018-04-11 | 2018-04-11 | Middle pressure station service electrical system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820512956.3U CN207967945U (en) | 2018-04-11 | 2018-04-11 | Middle pressure station service electrical system |
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| Publication Number | Publication Date |
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| CN207967945U true CN207967945U (en) | 2018-10-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110071508A (en) * | 2018-04-11 | 2019-07-30 | 国电建投内蒙古能源有限公司 | Middle pressure station service electrical system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110071508A (en) * | 2018-04-11 | 2019-07-30 | 国电建投内蒙古能源有限公司 | Middle pressure station service electrical system |
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