CN214755529U - Service power recovery structure for high-temperature gas cooled reactor whole plant after power loss - Google Patents
Service power recovery structure for high-temperature gas cooled reactor whole plant after power loss Download PDFInfo
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- CN214755529U CN214755529U CN202121100615.3U CN202121100615U CN214755529U CN 214755529 U CN214755529 U CN 214755529U CN 202121100615 U CN202121100615 U CN 202121100615U CN 214755529 U CN214755529 U CN 214755529U
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Abstract
The structure for recovering the station power supply after the power loss of the whole high-temperature gas cooled reactor station comprises a power supply connection mode and a cable termination mode, wherein the power supply connection mode is as follows: the cable from the construction substation of the energy area to the power distribution system of the display center is directly connected with a wiring terminal of the incoming line switch cabinet in a compression joint mode, and the standby power supply directly supplies power for station service; the cable termination is in the form of: cables from a construction substation and incoming cables of an incoming switch cabinet are simultaneously connected to the wiring terminals in end mode, and the positions of the cables are located on two sides of the wiring copper bar respectively; according to the invention, a power supply does not need to be introduced from the outside, and only the reserved 6kV cable from the construction substation to the display center is connected to the corresponding position, so that the construction work amount is small, the use is convenient, the power supply range is large, and the power supply is stable.
Description
Technical Field
The utility model relates to a circuit structure especially relates to a structure that factory power supply resumes after the whole factory of high temperature gas cooled reactor loses the electricity.
Background
The nuclear power plant external start power supply generally refers to an external power supply for supplying power to a load in a plant before a reactor and a unit are started. The high-temperature reactor demonstration project is provided with two 220kV priority power supplies and one 110kV auxiliary power supply, and two emergency diesel generators are used as emergency power supplies. When the nuclear power plant is normally stopped and started, a 220kV off-plant priority power supply supplies power to a plant load through a main transformer and a high-plant transformer, and an off-plant auxiliary power supply supplies power to an in-plant load through a high-auxiliary transformer when a main power supply fails. In addition, the high-temperature reactor demonstration project is characterized in that two emergency diesel generators are respectively configured on two sections of nuclear island emergency buses to serve as emergency power supplies when a power distribution system of a nuclear island in a plant has a power supply fault.
If the power plant loses the outside priority power and auxiliary power supply simultaneously, emergency diesel generating set is not available again in the factory, after a period of time under this state, by the system of the interior battery power supply of factory because of the battery power exhaustion loses the power supply, then the whole factory gets into a comparatively serious accident situation: completely losing the service power.
Before the off-plant starting power supply is put into operation again, the protection, control and monitoring systems of power receiving equipment such as an on-off station, a transformer and the like in the plant must be put into operation in advance, and a certain initial power supply needs to be provided for the equipment. The capacity of the power supply requirement is small, the time is short, a temporary power supply or an emergency power supply is generally adopted for supplying power, and the power supply is switched into a formal power supply after the power supply outside a plant is available. In the normal operation period, the construction power supply temporarily arranged in the construction stage of the high-temperature reactor demonstration project is removed, and if the external power supply of the power plant is completely lost, the external power supply of the power plant needs to have the commissioning condition again under the condition that the temporary construction power supply does not exist, so that the startup of the reactor and the unit is recovered.
In the early stage of high-temperature reactor construction, in a power distribution system for a high-temperature reactor plant, a power supply of a pre-factory area display center 6kV power distribution system comes from a power energy area 35kV construction substation, the power supply is converted into power supply of the high-temperature reactor 6kV bus after the high-temperature reactor 6kV bus is available, and a cable from the originally configured power energy area 35kV construction substation to the display center 6kV power distribution system is not completely detached, so that the display center power distribution system can be used as a switching connection, and the power energy area 35kV power distribution substation is used as a power supply under the emergency condition of the high-temperature reactor.
SUMMERY OF THE UTILITY MODEL
The utility model aims at: the problem of the high temperature reactor loses the house service power completely, makes the power plant factory external power possess the condition of putting in service again, then resumes the start-up of reactor, unit is solved.
The technical scheme is as follows:
a structure that is used for factory power supply recovery after high temperature gas cooled reactor whole factory loses power, including power supply connection mode and cable termination form, characterized by:
the power supply connection mode is as follows: the cable from the construction substation of the energy area to the power distribution system of the display center is directly connected with a wiring terminal of the incoming line switch cabinet in a compression joint mode, and the standby power supply directly supplies power for station service;
the cable termination is in the form of: the cable from the construction substation and the incoming cable of the incoming switch cabinet are simultaneously connected to the wiring terminal in a terminating mode, and the positions of the cables are located on two sides of the wiring copper bar respectively.
Preferably: the power supply connection mode comprises the following specific connection modes:
the 6kV bus of the construction substation supplies power to a 6kV system A bus through the switches 1 and 2, and supplies power to a 6kV A bus of a display center through the switches 1 and 3; the 6kV A bus of the display center supplies power to a 6kV B bus of the display center through a switch 4; the 6kV B bus of the display center supplies power to the 6kV B bus through the switches 5 and 6; the high-voltage station transformer supplies power to a bus A of the 6kV system and a bus B of the 6kV system through switches 7 and 9 respectively; the high-voltage auxiliary transformer supplies power to a bus A of the 6kV system and a bus B of the 6kV system through switches 8 and 10 respectively; the 220kV main power supply outputs a main power supply for the high-voltage station transformer through a main transformer; the 110kV auxiliary power supply outputs the auxiliary power supply through the high-voltage auxiliary transformer.
Preferably: the power supply connection mode further comprises: the cable and the incoming cable of the standby power supply are directly connected with the wiring terminal of the switch cabinet in a crimping mode through bolts.
Preferably: the cable termination form further comprises a spare cable, and the spare cable and the incoming cable are respectively located on two sides of the wiring copper bar and connected through bolts.
Preferably: the cable termination form further comprises: a normal incoming cable connecting cable joint and a construction temporary cable joint between the switch cabinet busbar and the switches 2 and 3 are connected together by adopting a hexagon bolt, a first washer and a second washer and are locked by a spring washer and a bolt.
Has the advantages that:
according to the scheme, a power supply does not need to be introduced from the outside, and only the reserved 6kV cable end from the construction substation to the display center is connected to the corresponding position, so that the power supply range is wide, and the power supply is stable; the power supply mode does not change the power supply structure of the original station service power system, and is convenient and quick to implement and short in power failure time.
Drawings
Fig. 1 shows the power connection mode of the present invention.
Fig. 2 is a particular cable termination form of section a of fig. 1.
As shown, 1 is a hex screw; 2 is a first gasket; 3 is a wiring busbar of the switch 3 in fig. 1; 4 is a second gasket; 5 is a spring washer; 6 is a hexagon nut; the normal incoming cable is the connection cable joint between the switches 2 and 3 in fig. 1, and the construction temporary cable is the construction temporary cable (the dotted line part in fig. 1) joint between the switches 1 and 2 in fig. 1.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
A structure that is used for factory power supply recovery after high temperature gas cooled reactor whole factory loses power, including power supply connection mode and cable termination form, characterized by:
the power supply connection mode is as follows: the cable from the construction substation of the energy area to the power distribution system of the display center is directly connected with a wiring terminal of the incoming line switch cabinet in a compression joint mode, and the standby power supply directly supplies power for station service;
the cable termination is in the form of: the cable from the construction substation and the incoming cable of the incoming switch cabinet are simultaneously connected to the wiring terminal in a terminating mode, and the positions of the cables are located on two sides of the wiring copper bar respectively.
The power supply connection mode comprises the following specific connection modes:
the 6kV bus of the construction substation supplies power to a 6kV system A bus through the switches 1 and 2, and supplies power to a 6kV A bus of a display center through the switches 1 and 3; the 6kV A bus of the display center supplies power to a 6kV B bus of the display center through a switch 4; and the 6kV B bus of the display center supplies power to the 6kV B bus through the switches 5 and 6.
The power supply recovery implementation process comprises the following steps: under normal conditions, the 220kV main power supply outputs a 6kV power supply through a main transformer and a high-voltage station transformer, and supplies power to a bus of a 6kV system A and a bus of a 6kV system B through switches 7 and 9 respectively; the 110kV auxiliary power supply outputs a 6kV power supply through the high-voltage auxiliary transformer, and supplies power to a 6kV system A bus and a 6kV system B bus through switches 8 and 10 respectively. When the power grid loses power, the switches 6, 7, 8 and 9 are all disconnected, cables from a construction substation in a force energy area to a power distribution system in a display center are directly connected with incoming cables in a connecting terminal of an incoming switch cabinet in a pressing mode, the switches 1 and 2 are closed to supply power to a bus of a 6kV system A, the switches 3, 4, 5 and 6 are closed to supply power to a bus of the 6kV system A, a bus of the B system and a bus of the 6kV system B in the display center, and therefore power recovery is achieved.
The power supply connection mode further comprises: the cable and the incoming cable of the standby power supply are directly connected with the wiring terminal of the switch cabinet in a crimping mode through bolts. The cable termination form further comprises a spare cable, and the spare cable and the incoming cable are respectively located on two sides of the wiring copper bar and connected through bolts. The cable termination form further comprises: a normal incoming cable connecting cable joint and a construction temporary cable joint between the switch cabinet busbar and the switches 2 and 3 are connected together by adopting a hexagon bolt, a first washer and a second washer and are locked by a spring washer and a bolt.
The display center power distribution cabinet can realize the connection between the construction substation and the high-temperature reactor 6kV cable electrical entity. In the process that a power supply of a 6kV power distribution system of a display center is changed into a high-temperature reactor power supply from a construction substation, a 6kV cable from the construction substation to the display is reserved, the 6kV cable is guaranteed to keep relevant electrical performance and can be electrically and physically connected with the high-temperature reactor 6kV cable, the cable from the construction substation and the incoming line cable of the incoming line switch cabinet are simultaneously connected to a wiring terminal in a terminating mode, and the positions of the cable and the incoming line cable are respectively located on two sides of a wiring copper bar, as shown in fig. 1 and fig. 2.
Calculating whether the capacity of each 6kV distribution switch meets the requirement: by analyzing the 220kV reverse power transmission period of the high-temperature reactor and other loads of a 6kV belt part after power transmission, the load current of the incoming line switch is approximately between 30A and 120A, the minimum capacity switch in the wiring mode is a 6kV IA section display central power switch of the high-temperature reactor, the rated current is 350A, the load capacity is small, and the requirements are met.
Calculating whether each 6kV distribution switch protection configuration meets the requirement: construction substation, show center, high temperature reactor 6kV distribution switch protection all dispose overcurrent protection, overload protection and ground protection only, wherein overcurrent protection and ground protection act on the tripping operation, and overload protection acts on the warning, as shown in table 1.
Watch 16 kV member load switch protection on-off condition
After the power supply wiring mode is changed, the wiring mode and the load of the high-temperature reactor 6kV system are unchanged, the protection constant value of the switch is not changed greatly or is unchanged, the power supply load is small, the temporary power supply time is short, and the original constant value can be kept unchanged.
Claims (10)
1. A structure that is used for factory power supply recovery after high temperature gas cooled reactor whole factory loses power, including power supply connection mode and cable termination form, characterized by:
the power supply connection mode is as follows: the cable from the construction substation of the energy area to the power distribution system of the display center is directly connected with a wiring terminal of the incoming line switch cabinet in a compression joint mode, and the standby power supply directly supplies power for station service;
the cable termination is in the form of: the cable from the construction substation and the incoming cable of the incoming switch cabinet are simultaneously connected to the wiring terminal in a terminating mode, and the positions of the cables are located on two sides of the wiring copper bar respectively.
2. The structure for recovering the plant power supply after the power loss of the whole high temperature gas cooled reactor plant according to claim 1, wherein: the power supply connection mode comprises the following specific connection modes:
the 6kV bus of the construction substation supplies power to the 6kV system A bus through the switches 1 and 2, and supplies power to the 6kV A bus of the display center through the switches 1 and 3.
3. The structure for recovering the plant power supply after the power loss of the whole high temperature gas cooled reactor plant according to claim 2, wherein: the 6kV A bus of the display center supplies power to a 6kV B bus of the display center through a switch 4; a6 kV B bus of the display center supplies power to the 6kV B bus through switches 5 and 6, and a high-voltage station transformer supplies power to a 6kV system A bus and a 6kV system B bus through switches 7 and 9 respectively.
4. The structure for recovering the plant power supply after the high temperature gas cooled reactor whole plant loses power according to claim 3, characterized in that: the high-voltage auxiliary transformer supplies power for a 6kV system A bus and a 6kV system B bus through switches 8 and 10 respectively.
5. The structure for recovering the plant power supply after the high temperature gas cooled reactor whole plant loses power according to claim 4, characterized in that: the 220kV main power supply outputs a main power supply for the high-voltage station transformer through a main transformer.
6. The structure for recovering the plant power supply after the high temperature gas cooled reactor whole plant loses power according to claim 5, characterized in that: the 110kV auxiliary power supply outputs the auxiliary power supply through the high-voltage auxiliary transformer.
7. The structure for recovering the plant power supply after the power loss of the whole high temperature gas cooled reactor plant according to claim 1, wherein: the power supply connection mode further comprises: the cable and the incoming cable of the standby power supply are directly connected with the wiring terminal of the switch cabinet in a crimping mode through bolts.
8. The structure for recovering the plant power supply after the power loss of the whole high temperature gas cooled reactor plant according to claim 1, wherein: the cable termination form further comprises a standby cable, and the standby cable and the incoming cable are respectively located on two sides of the wiring copper bar.
9. The structure of claim 8, wherein the structure is used for recovering the plant power supply after the high temperature gas cooled reactor plant loses power, and comprises: the standby cable is connected with the incoming cable through a bolt.
10. The structure for recovering the plant power supply after the power loss of the whole high temperature gas cooled reactor plant according to claim 2, wherein: the cable termination is in the form of: a normal incoming cable connecting cable joint and a construction temporary cable joint between the switch cabinet busbar and the switches 2 and 3 are connected together by adopting a hexagon bolt, a first washer and a second washer and are locked by a spring washer and a bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121100615.3U CN214755529U (en) | 2021-05-21 | 2021-05-21 | Service power recovery structure for high-temperature gas cooled reactor whole plant after power loss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121100615.3U CN214755529U (en) | 2021-05-21 | 2021-05-21 | Service power recovery structure for high-temperature gas cooled reactor whole plant after power loss |
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| Publication Number | Publication Date |
|---|---|
| CN214755529U true CN214755529U (en) | 2021-11-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121100615.3U Active CN214755529U (en) | 2021-05-21 | 2021-05-21 | Service power recovery structure for high-temperature gas cooled reactor whole plant after power loss |
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| Country | Link |
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| CN (1) | CN214755529U (en) |
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2021
- 2021-05-21 CN CN202121100615.3U patent/CN214755529U/en active Active
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