CN203522182U - Medium voltage station service system in auxiliary engine single-row configuration of two units in thermal power plant - Google Patents
Medium voltage station service system in auxiliary engine single-row configuration of two units in thermal power plant Download PDFInfo
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- CN203522182U CN203522182U CN201320563757.2U CN201320563757U CN203522182U CN 203522182 U CN203522182 U CN 203522182U CN 201320563757 U CN201320563757 U CN 201320563757U CN 203522182 U CN203522182 U CN 203522182U
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Abstract
The utility model relates to a medium voltage station service system in an auxiliary engine single-row configuration of two units in a thermal power plant. The medium voltage station service system includes a medium voltage bus and two unit loads. The medium bus includes a 1A-section medium voltage bus, a 1B-section medium voltage bus, a 2A-section medium voltage bus, a 2B-section medium voltage bus, a 12A shared-section medium voltage bus and a 12B shared-section medium voltage bus. One end of the 12A shared-section medium voltage bus is connected with a shared end of the 1B-section medium voltage bus while the other end of the 12A shared-section medium voltage bus is connected with one end of the 12B shared-section medium voltage bus. The other end of the 12B shared-section medium voltage bus is connected with a shared end of the 2B-section medium voltage bus. By applying the medium voltage station service system provided by the utility model, load balance of two low voltage split coils of a high voltage station transformer with split winding, so that power supply reliability of a main transformer and the medium voltage station service system and equipment operation safety and stability can be guaranteed further.
Description
Technical field
The utility model relates to thermal power generation station service electrical system field, particularly a kind of middle pressure station service electrical system being applied under the single-row configuration of thermal power plant subsidiary engine.
Background technology
Thermal power plant is the factory that the chemical energy of the fuel storage such as coal, oil, natural gas is changed into heat energy, changes heat energy into mechanical energy again, finally sends electric energy, and its production process is mainly that the electric power system and the electrical system that boiler, steam turbine, generator and accessory machinery, consist of realize.The subsidiary engine of boiler comprises primary air fan, forced draft fan, induced draft fan, coal pulverizer etc.; Steam turbine subsidiary engine comprises electrically driven feed pump, condensate pump, enclosed cooling water circulating pump etc.; In thermal power plant, also comprise the public subsidiary engines such as circulating water pump, air compressor machine, rainwater pump, rubber conveyer.Subsidiary engine presses station service that electric power is provided in thermal power plant.
In domestic large-scale conventional thermal power plant, boiler accessory machinery is mostly the operational mode that biserial configures at present.When thermal power plant subsidiary engine adopts biserial operational mode, the configuration concrete configuration of subsidiary engine is: when built two units the same period, the boiler accessory machinery of every unit (primary air fan, forced draft fan and induced draft fan), steam turbine subsidiary engine (electrically driven feed pump, condensate pump and enclosed cooling water circulating pump) and public subsidiary engine (as circulating water pump, air compressor machine, rainwater pump, rubber conveyer) all should arrange in pairs.The allocation plan of the middle pressure station service electrical system during configuration of subsidiary engine biserial needs relative set to be: every unit is established a main transformer, a main transformer carries in two sections presses bus, and paired boiler accessory machinery, steam turbine subsidiary engine and public subsidiary engine average mark are connected in two sections presses on bus.Adopt the operational mode of subsidiary engine biserial configuration, not only can meet the normal operation of boiler accessory machinery in thermal power plant, accomplished the setting of normal operation and standby operation equipment, also met the load balancing of two low pressure division volumes of high-voltage Auxiliary transformer with split winding simultaneously, but because every unit all needs both to have arranged normal operational outfit, stand-by equipment is set again, has therefore greatly increased the investment of power plant, reduced the cost performance of unit.
In recent years, along with the progressively raising of major pant item availability factor, large-size thermal power plant starts progressively to adopt the operational mode of the single-row configuration of boiler accessory machinery, and primary air fan, forced draft fan, induced draft fan carry out the single-row configuration of full capacity, can greatly save power plant's investment, improve the cost performance of unit.After primary air fan, forced draft fan, the single-row configuration of induced draft fan, from technological process, during unit operation, three single-row large blower fans need overall startup, indispensable.For improving power supply reliability; must be by single-row boiler accessory machinery centralized arrangement on the same middle pressure bus of unit; while pressing the device fails on bus like this in another; the standby steam turbine load of one fortune one could not affect unit and generate electricity at full capacity, and boiler can not cause compressor emergency shutdown by the form of load shedding yet.Yet middle pressure bus adopts this kind of sharing of load scheme, the load balancing that two the low pressure divisions of high-voltage Auxiliary transformer with split winding that are easy to realize while just having broken subsidiary engine biserial are originally rolled up, therefore also just cannot guarantee the power supply reliability of main transformer and middle pressure station service electrical system, and the safety and stability of apparatus body operation.
Utility model content
The utility model technical issues that need to address are to provide the middle pressure station service electrical system under the single-row configuration of a kind of heat power plant boiler, for the load balancing of two low pressure division volumes of high-voltage Auxiliary transformer with split winding is given security, further guarantee the power supply reliability of main transformer and middle pressure station service electrical system, and the safety and stability of apparatus body operation.
For solving the problems of the technologies described above, technical solution adopted in the utility model is:
Middle pressure station service electrical system in the unit of two, thermal power plant under the single-row configuration of subsidiary engine, comprise pressure bus and be arranged on two unit loads on middle pressure bus, every unit load comprises single-row boiler accessory machinery and the steam turbine subsidiary engine arranging in pairs, and the public load of two units comprises the public subsidiary engine of paired setting, described middle pressure bus comprises in the 1A section that is used to First unit load that electric power is provided presses in bus and 1B section and presses bus, be used to second unit load to provide to press in the 2A section of electric power in bus and 2B section, to press bus and be used to two unit public loads to provide in the 12A common section of electric power and press in bus and 12B common section and press bus, in described 12A common section, press one end of bus to be connected with pressing the public end of bus in 1B section, in 12A common section, press the other end of bus to be connected with pressing one end of bus in 12B common section, in 12B common section, press the other end of bus to be connected with pressing the public end of bus in 2B section,
The single-row boiler accessory machinery of described First unit is arranged in 1A section presses on bus, and the steam turbine subsidiary engine that First unit arranges is in pairs separately positioned in 1A section presses in bus and 1B section and press on bus; The single-row boiler accessory machinery of second unit is arranged in 2A section presses on bus, and second paired steam turbine subsidiary engine arranging of unit is separately positioned in 2A section and presses in bus and 2B section and press on bus; The public load of two units is separately positioned in 12A common section and presses in bus and 12B common section and press on bus.
Improvement of the present utility model is: in described 1A section, press to press in bus, 1B section and in bus, 2A section, press bus also by circuit breaker, to be connected same respectively with the end of incoming cables of pressing bus in 2B section to open standby change.
Owing to having adopted technique scheme, the technological progress that the utility model is obtained is:
The utility model is applied in thermal power plant to be built in two units in the middle pressure station service electrical system under the single-row configuration of boiler accessory machinery the same period, by arranging, in common section, press bus, be convenient to public load to manage concentratedly, both strengthened unit unit, make whole station service electrical system can not affect because of the fault of a unit the normal operation of other units, the load balancing that has kept again two low pressure division volumes of high-voltage Auxiliary transformer with split winding, further guarantee the power supply reliability of main transformer and middle pressure station service electrical system, and the safety and stability of apparatus body operation.
Accompanying drawing explanation
Fig. 1: winding diagram of the present utility model.
Embodiment
Below in conjunction with the drawings and the specific embodiments, the utility model is done further to describe in detail:
A middle pressure station service electrical system in the unit of two, thermal power plant under the single-row configuration of subsidiary engine, its winding diagram as shown in Figure 1.Middle pressure station service electrical system comprises middle pressure bus and is arranged on two unit loads on middle pressure bus.Every unit load comprises single-row boiler accessory machinery and the steam turbine subsidiary engine arranging in pairs, and the public load of two units comprises the public subsidiary engine of paired setting.
Middle pressure bus comprises in 1A section presses in bus, 1B section and presses in bus, 2A section and press in bus, 2B section and press in bus, 12A common section and press in bus and 12B common section and press bus.
Wherein: in 1A section, press in bus and 1B section and press bus to be used to First unit load that electric power is provided.In 1A section, press and in bus, 1B section, press the end of incoming cables of bus to be connected on two low pressure division volumes of No. 1 high factory change, in 1A section, press the leading-out terminal of bus to connect respectively the single-row boiler accessory machinery of First unit and one group of steam turbine subsidiary engine of First unit, in 1B section, press another group steam turbine subsidiary engine of the leading-out terminal connection First unit of bus, in 1A section, press in bus and 1B section and press two groups of steam turbine subsidiary engines on bus standby each other.
In 2A section, pressing in bus and 2B section presses bus to be used to second unit load that electric power is provided.In 2A section, press and in bus and 2B section, press the end of incoming cables of bus to be connected on two low pressure division volumes of No. 2 high factories change, in 2A section, press the leading-out terminal of bus to connect respectively the single-row boiler accessory machinery of second unit and one group of steam turbine subsidiary engine of second unit, in 2B section, press another group steam turbine subsidiary engine of second unit of leading-out terminal connection of bus, in 2A section, press in bus and 2B section and press two groups of steam turbine subsidiary engines on bus standby each other.
In 12A common section, pressing in bus and 12B common section presses bus to be used to two unit public loads that electric power is provided.In 12A common section, press one end of bus to be connected with pressing the public end of bus in 1B section, in 12A common section, press the other end of bus to be connected with pressing one end of bus in 12B common section, in 12B common section, press the other end of bus to be connected with pressing the public end of bus in 2B section.In 12A common section, press bus and the leading-out terminal of pressing bus in 12B common section to be connected respectively two groups of public subsidiary engines of two unit public loads.
In the present embodiment, in 1A section, press to press in bus, 1B section and in bus, 2A section, press bus also by circuit breaker, to be connected same respectively with the end of incoming cables of pressing bus in 2B section to open standby change, as No. 1 high factory, become and/or during No. 2 high factory accidents barriers, for power load provides electric power.
The utility model is applied in certain the first phase 2 * 660MW of Bu Lian power plant of Co., Ltd unit, presses the load calculating of bus as shown in table 1 in each, presses the load of bus to calculate as shown in table 2 in two common sections.
Table 1
Table 2
By table 1 and table 2, can be found out, in whole middle pressure station service electrical system, in common section, press bus to play vital effect, be embodied in following some:
1) unit keeps
In common section, press the setting of bus to be convenient to public load to manage concentratedly; the unit of strengthening unit; can be because of the normal operation of other unit of unit station service electrical system fault effects, to coordinating unit maintenance, shutdown and overhauling under this unit auxiliary switchgear etc. all more for convenience.
2) load balancing
In common section, press bus to play key effect to the load balancing after keeping subsidiary engine single-row.According to the connection type of example engineering, three single-row large blower fan unifications are connected to middle pressure bus A section, and common section is connected to middle pressure bus B section, and according to the whole computational methods of moving of all loads of not considering to connect this section of bus, the working capacity of getting every section of public bus is multiplied by 0.85 coefficient and counts in the middle of population size, as shown in table 1,2, substantially accomplished the load balancing of two low pressure division volumes of high-voltage Auxiliary transformer with split winding.
3) area reduces
Owing to pressing be arranged dividing of bus section, busbar section and public middle pressure bus section, busbar section in each unit, and according to common section load display case, can the public power distribution station of middle pressure be set separately outward at unit 0m or main power house, 30m2 left and right (adding up to according to two units) is reduced in the distribution board position that makes to be arranged in the pressure station-service work switchgear house in steam turbine building intermediate layer, floor space reduces greatly, makes division of room more reasonable.
Claims (2)
1. the middle pressure station service electrical system under the single-row configuration of subsidiary engine in the unit of two, thermal power plant, comprise pressure bus and be arranged on two unit loads on middle pressure bus, every unit load comprises single-row boiler accessory machinery and the steam turbine subsidiary engine arranging in pairs, and the public load of two units comprises the public subsidiary engine of paired setting, it is characterized in that: described middle pressure bus comprises in the 1A section that is used to First unit load that electric power is provided presses in bus and 1B section and press bus, be used to second unit load to provide to press in the 2A section of electric power in bus and 2B section, to press bus and be used to two unit public loads to provide in the 12A common section of electric power and press in bus and 12B common section and press bus, in described 12A common section, press one end of bus to be connected with pressing the public end of bus in 1B section, in 12A common section, press the other end of bus to be connected with pressing one end of bus in 12B common section, in 12B common section, press the other end of bus to be connected with pressing the public end of bus in 2B section,
The single-row boiler accessory machinery of described First unit is arranged in 1A section presses on bus, and the steam turbine subsidiary engine that First unit arranges is in pairs separately positioned in 1A section presses in bus and 1B section and press on bus; The single-row boiler accessory machinery of second unit is arranged in 2A section presses on bus, and second paired steam turbine subsidiary engine arranging of unit is separately positioned in 2A section and presses in bus and 2B section and press on bus; The public load of two units is separately positioned in 12A common section and presses in bus and 12B common section and press on bus.
2. the middle pressure station service electrical system under the single-row configuration of subsidiary engine in the unit of two, thermal power plant according to claim 1, is characterized in that: in described 1A section, press to press in bus, 1B section and in bus, 2A section, press bus also by circuit breaker, to be connected same respectively with the end of incoming cables of pressing bus in 2B section to open standby change.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320563757.2U CN203522182U (en) | 2013-09-11 | 2013-09-11 | Medium voltage station service system in auxiliary engine single-row configuration of two units in thermal power plant |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320563757.2U CN203522182U (en) | 2013-09-11 | 2013-09-11 | Medium voltage station service system in auxiliary engine single-row configuration of two units in thermal power plant |
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| CN203522182U true CN203522182U (en) | 2014-04-02 |
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| CN201320563757.2U Expired - Fee Related CN203522182U (en) | 2013-09-11 | 2013-09-11 | Medium voltage station service system in auxiliary engine single-row configuration of two units in thermal power plant |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105762804A (en) * | 2016-05-06 | 2016-07-13 | 中国能源建设集团湖南省电力设计院有限公司 | Direct drop 10-kV power supply wiring structure for 110-kV high-capacity transformer with split windings |
| CN105762805A (en) * | 2016-05-06 | 2016-07-13 | 中国能源建设集团湖南省电力设计院有限公司 | Direct drop 10-kV power supply wiring structure for 220-kV high-capacity transformer with split windings |
| CN106208153A (en) * | 2016-07-27 | 2016-12-07 | 西安西热节能技术有限公司 | A kind of power plant subsidiary engine tracking power source system |
| CN108418215A (en) * | 2018-04-13 | 2018-08-17 | 国电建投内蒙古能源有限公司 | Auxiliary single-line diagram method |
| CN108418217A (en) * | 2018-04-16 | 2018-08-17 | 国电建投内蒙古能源有限公司 | The configuration method of station service electrical system |
| CN108418216A (en) * | 2018-04-16 | 2018-08-17 | 国电建投内蒙古能源有限公司 | Station service load distribution method |
| CN108494086A (en) * | 2018-04-18 | 2018-09-04 | 国电建投内蒙古能源有限公司 | Service power voltage hierarchical selection method, equipment and medium |
| CN108536110A (en) * | 2018-06-30 | 2018-09-14 | 神华国华广投（柳州）发电有限责任公司 | A kind of single-row unit of subsidiary engine from start-stop control system |
| CN108832641A (en) * | 2018-06-06 | 2018-11-16 | 三峡大学 | A kind of intelligent sub-controlling unit and control method of service power |
| CN108879703A (en) * | 2018-07-24 | 2018-11-23 | 成都市兴蓉再生能源有限公司 | A kind of house transformer operation method |
| CN108964112A (en) * | 2017-05-19 | 2018-12-07 | 中国电力工程顾问集团华东电力设计院有限公司 | The wiring construction and its operation method of small steam turbine generator access high-voltage Auxiliary electric system |
| CN109066960A (en) * | 2018-08-22 | 2018-12-21 | 江苏核电有限公司 | A kind of nuclear power unit standby power supply device and its control method |
| 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 |
| CN110071509A (en) * | 2018-04-13 | 2019-07-30 | 国电建投内蒙古能源有限公司 | Middle pressure auxiliary single-line diagram circuit |
| CN110601235A (en) * | 2019-10-15 | 2019-12-20 | 西安热工研究院有限公司 | Super capacitor auxiliary frequency modulation system suitable for multiple units of thermal power plant |
| CN114156918A (en) * | 2021-11-25 | 2022-03-08 | 中盐华能储能科技有限公司 | Transformer of salt cavern compressed air energy storage power station and low-voltage station service configuration method |
| CN114825483A (en) * | 2022-06-29 | 2022-07-29 | 西安热工研究院有限公司 | Thermal power generating unit frequency modulation system, method and device |
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- 2013-09-11 CN CN201320563757.2U patent/CN203522182U/en not_active Expired - Fee Related
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105762804A (en) * | 2016-05-06 | 2016-07-13 | 中国能源建设集团湖南省电力设计院有限公司 | Direct drop 10-kV power supply wiring structure for 110-kV high-capacity transformer with split windings |
| CN105762805A (en) * | 2016-05-06 | 2016-07-13 | 中国能源建设集团湖南省电力设计院有限公司 | Direct drop 10-kV power supply wiring structure for 220-kV high-capacity transformer with split windings |
| CN106208153A (en) * | 2016-07-27 | 2016-12-07 | 西安西热节能技术有限公司 | A kind of power plant subsidiary engine tracking power source system |
| CN106208153B (en) * | 2016-07-27 | 2018-09-18 | 西安西热节能技术有限公司 | A kind of power generation station-service subsidiary engine system tune power source system |
| CN108964112A (en) * | 2017-05-19 | 2018-12-07 | 中国电力工程顾问集团华东电力设计院有限公司 | The wiring construction and its operation method of small steam turbine generator access high-voltage Auxiliary electric system |
| 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 |
| CN108418215A (en) * | 2018-04-13 | 2018-08-17 | 国电建投内蒙古能源有限公司 | Auxiliary single-line diagram method |
| CN110071509A (en) * | 2018-04-13 | 2019-07-30 | 国电建投内蒙古能源有限公司 | Middle pressure auxiliary single-line diagram circuit |
| CN108418217A (en) * | 2018-04-16 | 2018-08-17 | 国电建投内蒙古能源有限公司 | The configuration method of station service electrical system |
| CN108418216A (en) * | 2018-04-16 | 2018-08-17 | 国电建投内蒙古能源有限公司 | Station service load distribution method |
| CN108494086A (en) * | 2018-04-18 | 2018-09-04 | 国电建投内蒙古能源有限公司 | Service power voltage hierarchical selection method, equipment and medium |
| CN108832641A (en) * | 2018-06-06 | 2018-11-16 | 三峡大学 | A kind of intelligent sub-controlling unit and control method of service power |
| CN108832641B (en) * | 2018-06-06 | 2021-05-14 | 三峡大学 | Intelligent auxiliary control device and control method for station service power supply |
| CN108536110B (en) * | 2018-06-30 | 2024-02-20 | 国能广投柳州发电有限公司 | Automatic start-stop control system of auxiliary unit single-row unit |
| CN108536110A (en) * | 2018-06-30 | 2018-09-14 | 神华国华广投（柳州）发电有限责任公司 | A kind of single-row unit of subsidiary engine from start-stop control system |
| CN108879703A (en) * | 2018-07-24 | 2018-11-23 | 成都市兴蓉再生能源有限公司 | A kind of house transformer operation method |
| CN109066960A (en) * | 2018-08-22 | 2018-12-21 | 江苏核电有限公司 | A kind of nuclear power unit standby power supply device and its control method |
| CN110601235A (en) * | 2019-10-15 | 2019-12-20 | 西安热工研究院有限公司 | Super capacitor auxiliary frequency modulation system suitable for multiple units of thermal power plant |
| CN114156918A (en) * | 2021-11-25 | 2022-03-08 | 中盐华能储能科技有限公司 | Transformer of salt cavern compressed air energy storage power station and low-voltage station service configuration method |
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