CN210156923U - Power plant accident safety power supply system - Google Patents
Power plant accident safety power supply system Download PDFInfo
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- CN210156923U CN210156923U CN201921083783.9U CN201921083783U CN210156923U CN 210156923 U CN210156923 U CN 210156923U CN 201921083783 U CN201921083783 U CN 201921083783U CN 210156923 U CN210156923 U CN 210156923U
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- power supply
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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
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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
- 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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- Supply And Distribution Of Alternating Current (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
The utility model discloses a power plant accident security electrical power generating system, include: the alternating-current low-voltage station service power supply is connected with each unit; a safety equipment power supply cabinet and an accident safety standby power supply cabinet are arranged in each unit centralized control room; the emergency power supply cabinet is internally provided with an emergency power supply switch and an emergency power supply disconnecting link which are sequentially connected with the alternating-current low-voltage station power supply, and the whole emergency power supply switch and the emergency power supply disconnecting link are connected with an original electrical loop of the emergency equipment power supply cabinet in parallel; the emergency power supply cabinet for emergency security is also provided with a locking switch aiming at the original electric loop. When the service interruption of the power plant occurs and the diesel generator set can not be started, the original electrical loop of the safety equipment can be immediately locked, the emergency power switch and the emergency power knife switch for the safety accident are put into use, the safety equipment such as the alternating-current oil pump is started, and the safe shutdown of the steam turbine generator set is ensured. The system is suitable for the transformation of old thermal power plants, and has the advantages of less investment, simple and convenient operation and reliable work.
Description
Technical Field
The utility model relates to a electrical power generating system technical field, concretely relates to power plant accident security electrical power generating system.
Background
There are related requirements for thermal power plants: the unit with capacity of 200MW or above should be provided with AC safety equipment, and the AC safety equipment is preferably a diesel generator set with quick start. The alternating current security equipment is used for ensuring safe shutdown in the interruption accident of the service power of the power plant caused by various reasons, and simultaneously ensuring that the equipment is not damaged. The alternating-current safety equipment can be applied to equipment such as an alternating-current lubricating oil pump of a steam turbine, a top shaft oil pump, a generator air-hydrogen side sealing oil pump, an air preheater auxiliary motor and the like.
Shaanxi Weihe Power generation Limited company is provided with 4 sets with the capacity of 300MW, each set is provided with 1 500KW diesel generator set according to relevant requirements on a thermal power plant, and power is supplied to alternating-current security equipment under the condition of service power interruption. However, due to early factory building and old diesel generator technology, the working condition is not good in an accident state, and the phenomenon of tripping or refusing to start after starting occasionally occurs, so that great trouble is caused for correctly handling the service interruption accident of the generator set. The investment for modifying and replacing the diesel generator is large, the diesel generator set can work normally under most conditions, and the cost performance of modification and replacement is low.
Therefore, it is necessary to develop an economical and practical emergency power supply system for power plant accidents, which can ensure the safe and reliable operation of the ac emergency power supply in case of service interruption.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a power plant accident security electrical power generating system to solve the not good problem of working condition when the accident situation to the diesel generator of exchanging security equipment power supply.
In order to solve the technical problem, the utility model provides a power plant accident security electrical power generating system, include:
the alternating-current low-voltage station service power supply is connected with each unit and is obtained by introducing and converting an external high-voltage power supply;
a safety equipment power supply cabinet and an accident safety standby power supply cabinet are arranged in each unit centralized control room; the emergency power supply cabinet is internally provided with an emergency power supply switch and an emergency power supply disconnecting link which are sequentially connected with the alternating-current low-voltage station power supply, and the whole emergency power supply switch and the emergency power supply disconnecting link are connected with an original electrical loop of the emergency equipment power supply cabinet in parallel to supply power to electric equipment; the emergency power supply cabinet for emergency security is also provided with a locking switch aiming at the original electric loop.
Further, in the power plant emergency power supply system, the electric equipment is a main machine alternating-current lubricating oil pump motor; correspondingly, the security equipment power cabinet comprises a main machine alternating-current lubricating oil pump power knife switch and a main machine alternating-current lubricating oil pump contactor which are sequentially connected with the security equipment in series.
Furthermore, in the power plant accident safety power supply system, a path of power supply is introduced from an off-plant high-voltage power supply, and an alternating-current 400V low-voltage plant power supply is obtained through transformer transformation.
Further, in the emergency power supply system for power plant accidents, the capacity of the transformer is 800 KVA.
Further, in the emergency power supply system for power plant accidents, the voltage of the off-site high voltage power supply is 6000V.
Furthermore, in the emergency power supply system for power plant accidents, a standby power supply is also connected in series with the emergency power supply switch. The utility model provides a power plant accident security electrical power generating system has following advantage:
when the service interruption of the power plant occurs and the diesel generator set cannot be started, the original electrical loop of the security equipment can be immediately locked in the emergency security power cabinet, the security emergency power switch and the security emergency power knife switch are put into use, the security equipment such as the alternating-current oil pump is started, and the safe shutdown of the steam turbine generator set is ensured. The power plant accident safety power supply system is suitable for the reconstruction of the old thermal power plant, and has less investment; meanwhile, the operation is simple and convenient in an accident state; the spare electric loop has few elements and works reliably; furthermore, the characteristic that the power plant and a nearby power supply point have extremely low power failure possibility at the same time is fully utilized, and the reliability is extremely high.
Drawings
Fig. 1 is a schematic wiring diagram of an ac low-voltage station power supply and an emergency power supply cabinet according to the present embodiment;
fig. 2 is a schematic diagram of the connection between the power cabinet and the electric device of the security device of the present embodiment.
Detailed Description
To make the objects, advantages and features of the present invention clearer, the following detailed description of a power plant emergency power supply system according to the present invention is provided with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more fully apparent from the following description and appended claims. It should be noted that: the drawings are in a very simplified form and are not to precise scale, and are provided solely for the purpose of facilitating and distinctly aiding in the description of the embodiments of the present invention; secondly, the structures shown in the drawings are often part of the actual structure; again, the drawings may require different emphasis, sometimes on different proportions.
Referring to fig. 1, an emergency power supply system of a power plant, which illustrates four 300MW units #3 to #6, includes:
and the alternating-current low-voltage station service power supply is connected with each unit and is obtained by introducing and converting an external high-voltage power supply. Preferably, one path of power supply is introduced from an off-plant high-voltage power supply, is converted by a transformer to obtain an alternating-current 400V low-voltage plant power supply, and is distributed to each unit by a low-voltage distribution cabinet. The capacity of the transformer is 800 KVA; the voltage of the off-plant high-voltage power supply is 6000V.
A safety equipment power supply cabinet and an accident safety standby power supply cabinet are arranged in each unit centralized control room; the emergency power supply cabinet is internally provided with an emergency power supply switch and an emergency power supply disconnecting link which are sequentially connected with the alternating-current low-voltage station power supply, and the whole emergency power supply switch and the emergency power supply disconnecting link are connected with an original electrical loop of the emergency equipment power supply cabinet in parallel to supply power to electric equipment. Preferably, a standby power supply air switch is further connected in series behind the emergency power supply disconnecting link. The emergency power supply cabinet for emergency security is also provided with a locking switch aiming at the original electric loop.
In this embodiment, the electrical equipment is a host ac lubricating oil pump motor; correspondingly, the security equipment power cabinet comprises a main machine alternating-current lubricating oil pump power knife switch and a main machine alternating-current lubricating oil pump contactor which are sequentially connected with the security equipment in series.
Therefore, when the power utilization of the plant is interrupted under the normal condition, the diesel generator set works normally, and the original electric loop of the safety equipment power cabinet of the diesel generator set works normally. When the service interruption of the power plant occurs and the diesel generator set cannot be started, the original electrical loop of the security equipment can be immediately manually locked in the emergency security standby power cabinet, the security accident standby power switch and the security accident standby power switch are put into the security accident standby power cabinet, the standby power is put into the security accident standby power cabinet for idle opening, the security equipment such as the alternating current oil pump is started, and the safe shutdown of the steam turbine generator set is ensured.
To sum up, in the utility model provides an among the power plant accident security electrical power generating system, have following advantage:
the system is suitable for the reconstruction of the old thermal power plant, and has less investment; meanwhile, the operation is simple and convenient in an accident state; the spare electric loop has few elements, simple structure and high working reliability.
Furthermore, the characteristic that the power plant and a nearby power supply point have extremely low power failure possibility at the same time is fully utilized, and the reliability is improved.
Finally, it should be noted that the above description is only for the description of the preferred embodiments of the present invention, and not for any limitation on the scope of the present invention, and that any changes and modifications made by those skilled in the art according to the above disclosure are all within the scope of the appended claims.
Claims (6)
1. A power plant emergency power supply system, comprising:
the alternating-current low-voltage station service power supply is connected with each unit and is obtained by introducing and converting an external high-voltage power supply;
a safety equipment power supply cabinet and an accident safety standby power supply cabinet are arranged in each unit centralized control room; the emergency power supply cabinet is internally provided with an emergency power supply switch and an emergency power supply disconnecting link which are sequentially connected with the alternating-current low-voltage station power supply, and the whole emergency power supply switch and the emergency power supply disconnecting link are connected with an original electrical loop of the emergency equipment power supply cabinet in parallel to supply power to electric equipment; the emergency power supply cabinet for emergency security is also provided with a locking switch aiming at the original electric loop.
2. A power plant emergency power supply system according to claim 1, wherein said electrical equipment is a main machine ac lube oil pump motor; correspondingly, the security equipment power cabinet comprises a main machine alternating-current lubricating oil pump power knife switch and a main machine alternating-current lubricating oil pump contactor which are sequentially connected with the security equipment in series.
3. A power plant emergency power supply system according to claim 1, wherein a power supply is introduced from an off-plant high voltage power supply and converted by a transformer to obtain an ac 400V low voltage plant power supply.
4. A power plant emergency power supply system according to claim 3, wherein the transformer has a capacity of 800 KVA.
5. A power plant emergency power supply system according to claim 3, wherein the voltage of the off-plant high voltage power supply is 6000V.
6. A power plant emergency safety power supply system according to claim 1, wherein a standby power supply air switch is further connected in series after the emergency safety power supply disconnecting link.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921083783.9U CN210156923U (en) | 2019-07-11 | 2019-07-11 | Power plant accident safety power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921083783.9U CN210156923U (en) | 2019-07-11 | 2019-07-11 | Power plant accident safety power supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210156923U true CN210156923U (en) | 2020-03-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921083783.9U Active CN210156923U (en) | 2019-07-11 | 2019-07-11 | Power plant accident safety power supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210156923U (en) |
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2019
- 2019-07-11 CN CN201921083783.9U patent/CN210156923U/en active Active
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