SU1457057A1 - High-voltage switchgear - Google Patents

Abstract

The invention relates to the field of electrical engineering. The purpose of the invention is to increase the reliability, maintainability and safety of service. The busbar working systems 1, 2 and the busbar bypass system 7 are divided into two isolated sections, to which yes and 27 non-critical connections and responsible connections 16 and 33 are connected. Responsible connections 16 and 33 are normally connected to the sections of the bypass system through the disconnectors 21 and 38. The circuits of the bypass switches 22 and 39 are connected to the sections of the bus bypass system via the disconnectors 25 and 43. Repair of any of the sections of the working systems of prefabricated vehicles is performed by disconnecting the corresponding busbars disconnectors Repair of one of the bus interconnecting disconnectors with the latter in operation is performed by replacing the interconnect switch with a bypass switch connected to the same sections of busbar operating systems as the repaired connection. Repairing any of the sections of the busbar bypass system is carried out while simultaneously connecting different sections of the busbar working systems using bypass switches 22 and 39. 1 Il. 27 F cl O1 h |

Description

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The invention relates to electrical engineering, namely, to electrical switchgears of three-phase current of high voltage power stations and substations. The aim of the invention is to increase reliability, maintainability and safety of the service. The drawing shows the scheme of the proposed switchgear for normal mode (for the sake of simplicity, the drawing does not show the ground knives of the disconnectors, instrument transformers, arresters and other auxiliary elements of the switchgear (RU).

The working systems of the busbar system, busbars 1 and 2 are divided into two sections, respectively, the first 3 and the second 5, 6. The bypass busbar system 7 is also divided into two isolated sections, the first 8 and the second 9. Group of connections 10 through intermediate disconnectors 11, switches t2 and bus fork disconnectors 13 and 14 are connected to the same name. 3, 4 working systems of busbars, and through bypass disconnectors 15 are also connected with the section of the same name 8. bypass system of collecting- Responsible connection 1457qj572

5, 6, and through disconnectors 42, 43 - to sections 8, 9,

In the normal operation mode of the switchgear, all switches 12, 18 22, 29, 35 and 39, all disconnectors 13, .14, 19, 20, 23, 24, 30, 31, 36, 37, 40 and 41 forks from the working systems are on busbars 1, 2, all intermediate disconnectors 11, 17, 28, 34 of connections 10, 16, 27, 33, bypass disconnectors 21 and 38 in the chains of responsible connections 16 and 33, as well as disconnectors 25 and 43 in chains 15 bypass switches 22, 39, The remaining disconnectors RU in normal operation are disabled.

Repair of any of the sections of the working systems of modular pshn is carried out by disconnecting 20 busbar disconnectors adjacent to the section being serviced1 For example, to disconnect section 4 for repairs, bus disconnectors 14 of accession group 10, bus disconnector 20 of responsible connection 16 and disconnector 24 in the bypass circuit 22. In this case, the order of disconnection of the specified disconnectors is arbitrary and determines the cost of the minimum time to disconnect them.

Repair of one of the bus interconnecting disconnectors with preservation of the last in operation is performed by pu25

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16 through an intermediate disconnector 17, a switch 18 and a fork for replacing the connection switch of bus disconnectors 19 and 20 are connected to the first section 3 and 4 of the same working system of busbars 1 and 2. and bypass disconnector 21 to the second section 9 bypass busbar systems 7. Bypass, switch 22 through the forks of the disconnectors 23, 24 and 25, 26 are connected respectively to the first sections of the same name 3, 4 working systems of busbars 1, unit 15 of the repair bypass 9; Q, switch on ОВ 22, open the switch 12 and disconnectors 11 and 13 repaired by a connecting bypass switch connected to the same sections of the working busbar systems as the repaired connection. For example, for the repair 40 of the disconnector 14, the connections from group 10 turn off the bypass switch. The reader (S) 22 and the bypass disconnector 38 in the circuit of the responsible connection 33, include a bypass connector

2 and both sections 8, busbar ratios 7,

The group of connections 27 of other sections 5, 6 is connected to them through JQ disconnector 28, switch 29, disconnector 30, 31, and to section 9 through disconnector 32 Connection 33 through disconnector 34, switch 35, disconnectors 36, jj are connected to sections 5, 6 and through disconnector 38 to section 8. Bypass switch 39 is connected through disconnectors 40, 41 to sections

none 10, as well as bus disconnectors 14, all but the repaired connections of group 10 and bus disconnectors 20 and 24 in the responsible connection lines 16 and ОВ 22

Repairing any of the sections of the busbar bypass system is carried out while simultaneously connecting the opposite sections of the busbar operating systems with one bus-connecting bypass switch (SCHSB), in order to replace the connector for connecting the bus 15, repaired by the bypass switch connected to the same sections of the busbar operating systems, repaired connection. For example, to disconnect the disconnector 14 from group 10, the bypass switch is turned off to repair. the reader (S) 22 and the bypass disconnector 38 in the responsible connection circuit 33, include a bypass disconnected; Q, include ОВ 22, disconnect switch 12 and disconnectors 11 and 13 of repaired bay 10, as well as bus disconnectors 14 of all but repaired connections of group 10 and bus disconnectors 20 and 24 in the circuit of responsible connection 16 and ОВ 22

Repairing any of the sections of the busbar bypass system is carried out while simultaneously connecting the opposite sections of the busbar operating systems with one bus connecting bypass switch (SCHSB) formed from other agents. For example, the OB-switch 22, the bypass disconnector 38 of the responsible connections 33 and disconnector 25 in the ОВ 22 circuit, turn on disconnector 26 and ОВ 22 and disconnect the bypass disconnector 21 in the responsible connection circuit 16о

The decommissioning of section 9 (8) of the busbar bypass system 7 for the purpose of repairing the disconnector 26 (62) in the circuit 22 (39) is carried out in

1457057

Unlike sections of the working systems, a compiled psn 1 and 2 are executed either by one BSS, consisting of two OBs, or by two BSSs, one of which is denoted similarly to that specified in the last repair mode.

Claims (1)

Formula isob Rete n i ten A high-voltage switchgear with a workplace and a busbar partitioned bypass system, containing two the following sequence: disconnect the bypass switch 15 and connect the OV 39 (22) and the bypass disconnector 21 (38) to the circuit of the responsible connection 16 (33), disconnect the disconnector 43 (25) and turn on disconnector 42 (26). in the circuit OV 39 (22), turn on the OV 39 (22) and disconnect the bypass disconnector 38 (21) in the circuit of the responsible connection 33 (16), turn on the bypass disconnector connected to the circuit breaker as well as the disconnectors that, in order to improve reliability, repairs to fit and security. service, it contains two additional disconnectors that are turned off between each bypass switch and one of the bypass sections 15 (32) one of the 25 busbar system, the workers Tsiy of group 10 (27), disconnect OB 22 (39) and the disconnector 25 (43) and in its chain. In the specified repair mode, the modular system systems are partitioned, one of the connections of each section of the busbar working systems is connected to that section of the bypass system. nominated sections of the working systems of prefabricated 30 teams, tires, to which are connected The busbars 1, 2 are connected by a BSS, formed by ОВ 39 (22) and a switch 12 (29) of one of the connections of group 10 (27). In case of repair of the responsible connection 16 (33) connection all other connections of the other section of the working systems of prefabricated chic, and the bypass switches through the forks from the disconnectors are connected to 2g of both sections of the bypass system of the bus assembly 1457057 The opposite sections of the working systems of the compiled pseuds 1 and 2 are performed either by one BSS, consisting of two OBs, or two BSSs, one of which is framed similarly to that specified in the last repair mode. Formula isob Rete n i A high-voltage switchgear with a workplace and a busbar partitioned bypass system, containing two bypass switch and connecting 15 bypass switches and connections The circuit breakers connected to the circuit breaker, as well as disconnectors, are distinguished by the fact that, in order to increase the reliability, repair and utilization and safety. service, it contains two additional disconnectors that are turned off between each bypass switch and one of the bypass sections 25 busbar systems, with workers  Tin-joint systems are partitioned, one of the connections of each section of busbar working systems is connected to that section of the bypass system all other connections of the other section of the working systems of prefabricated chic, and the bypass switches through the forks from the disconnectors are connected to 2g of both sections of the bypass system of the bus assembly