CN208767849U - The offshore boosting station field electricity system of ring connection - Google Patents

Abstract

The utility model relates to a kind of offshore boosting station field electricity systems of ring connection.The purpose of the utility model is to provide a kind of offshore boosting station field electricity systems of ring connection, with the reliability of lifting system.The technical solution of the utility model is: the electricity system has bus I, bus II and bus III and field transformer AT1, AT2 and diesel-driven generator DG；Its median generatrix I and bus II are normal power supply buses, bus III is emergency service bus, field is with transformer AT1 through incoming switch S1 connection bus I, and field is with transformer AT2 through incoming switch S4 connection bus II, and diesel-driven generator DG is through incoming switch S6 connection bus III；It is connected between bus I and bus II through being connected to the cable of bus connection switch S3, it is connected between bus I and bus III through being connected to the cable of bus connection switch S2, S8, it is connected between bus II and bus III through being connected to the cable of bus connection switch S5, S7, constitutes loop checking installation through cable connection between bus I, II, III.

Description

The offshore boosting station field electricity system of ring connection

Technical field

The utility model relates to a kind of offshore boosting station field electricity systems of ring connection.Suitable for marine wind electric field sea Booster stations etc. other need high reliability power supply system occasion.

Background technique

The general offshore of offshore boosting station farther out, can not obtain backup power source from land.As the core of marine power generation field, Reliability effect the safe and stable operation of system.

Offshore boosting station field electricity system generally comprises normal power supply system and emergency power supply system, and normal power supply system is General lighting in booster stations, the generality load power supply such as air-conditioning, emergency power supply system is mainly electrical equipment, the importance such as fire-fighting Load power supply.The common low-voltage distribution system mode of connection includes: single bus scheme and single-trunk segmental wiring pattern.

Automatic transfer switch (ATS) is usually set when single bus scheme, between field transformer and emergency diesel dynamo, When normal power supply branch breaks down, diesel-driven generator starting, ATS automatically switches to emergency service branch.Due to using single Bus wiring, common load and important load link together, and when bus-bar fault, will lead to an electricity system paralysis.

When single-trunk segmental wiring, common load and important load are connected on two sections of buses, are mentioned to a certain extent The high reliability of system.Under bus connection switch fault condition, since diesel-driven generator stream time is limited, at some Between may cause emergency bus power loss in section.In the case of fault spread, multiple failure may occur simultaneously, such as mother event Singlephase earth fault occurs for barrier, diesel-driven generator inlet wire cable, and emergency bus will power loss at this time.

Summary of the invention

Technical problem to be solved by the utility model is: in view of the above problems, providing a kind of sea of ring connection Upper boosting yard electricity system, with the reliability of lifting system.

The technical scheme adopted by the utility model is a kind of offshore boosting station field electricity system of ring connection, special Sign is: having bus I, bus II and bus III and field transformer AT1, AT2 and diesel-driven generator DG；

Its median generatrix I and bus II are normal power supply buses, and bus III is emergency service bus, and field is passed through with transformer AT1 Incoming switch S1 connection bus I, with transformer AT2 through incoming switch S4 connection bus II, diesel-driven generator DG is opened through inlet wire for field Close S6 connection bus III；

It is connected to the cable of bus connection switch S3 between the bus I and bus II to be connected, through connecing between bus I and bus III There are the cable of bus connection switch S2, S8 to be connected, is connected between bus II and bus III through being connected to the cable of bus connection switch S5, S7, it is female Loop checking installation is constituted through cable connection between line I, II, III.

The normal power supply system being made of the incoming switch S1, S4, bus connection switch S2, S3, S5 and bus I, bus II Low-tension distribution board cabinet is matched with the emergency power supply system low pressure being made of the incoming switch S6, bus connection switch S7, S8 and bus III Electroplax cabinet is arranged separately at different rooms, and cable connection is used between normal power supply system and emergency power supply system.

The beneficial effects of the utility model are: being connected between the utility model median generatrix I, bus II and bus III through cable Loop checking installation is formed, when any circuit is broken down, can be its bussed supply by the bus connection switch at both ends, improve Redundancy, and then improve the reliability of system.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of embodiment.

Fig. 2 is the normal operation mode in embodiment.

Fig. 3 is a field transformer fault mode in embodiment.

Fig. 4 is two field transformer modes out of service in embodiment.

Fig. 5 is that the diesel-driven generator in embodiment is all load supplying modes.

Specific embodiment

As shown in Figure 1, the present embodiment is a kind of offshore boosting station field electricity system of ring connection, there is bus I, bus II and (field transformer AT1, AT2 are respectively quoted from medium voltage network with transformer AT2 bus III and field transformer AT1, field Sectionalized busbar) and diesel-driven generator DG.

The present embodiment median generatrix I and bus II are normal power supply buses, and bus III is emergency service bus.Use transformer in field AT1, AT2 are normal power supply, each other stand-by heat, and with transformer AT1 through incoming switch S1 connection bus I, field is used for midfield Transformer AT2 is through incoming switch S4 connection bus II.Diesel-driven generator DG is emergency power supply, as cold standby, diesel-driven generator DG is through incoming switch S6 connection bus III.

End of the head end of this example median generatrix I through cable connection bus II, the head end of bus II is through cable connection bus III End, the head end of bus III connects and composes annular through cable connection and returns through the end of cable connection bus I, bus I, II, III Road.It is connected to the cable of bus connection switch S3 between its median generatrix I and bus II to be connected, through being connected to mother between bus I and bus III The cable for joining switch S2, S8 is connected, and is connected between bus II and bus III through being connected to the cable of bus connection switch S5, S7.

In the utility model mode of connection

The normal power supply system low-voltage being made of incoming switch S1, S4, bus connection switch S2, S3, S5 and bus I, bus II Distribution board cabinet and the emergency power supply system low-tension distribution board cabinet point being made of incoming switch S6, bus connection switch S7, S8 and bus III It opens and is arranged in different rooms, use cable connection between normal power supply system and emergency power supply system, to improve system Reliability.

The working principle of the present embodiment is as follows:

(1) when system is working properly, as shown in Fig. 2, put into operation on the spot with transformer AT1, AT2, incoming switch S1, S4 closure, incoming switch S3 are disconnected, and bus I and bus II separate isolated operation.Bus III is connected to bus I or bus II, That is bus connection switch S2, S8 closure or bus connection switch S5, S7 closure, Fig. 2 indicate the case where bus III is connected to bus II.At this time Three bus open loop operations, field are that load is powered on bus I with transformer AT1, and field is bus II and bus with transformer AT2 The upper load power supply of III.

(2) when a field transformer is out of service, as shown in figure 3, incoming switch S1, S6 are disconnected, incoming switch S4 Closure, bus connection switch S3, S5, S7 closure, bus connection switch S2, S8 disconnection, three buses and all loads are supplied by a transformer Electricity.

(3) when two fields are out of service with transformer, as shown in figure 4, bus I and bus II power loss, diesel generation Machine DG starting, incoming switch S6 closure, rest switch are in off-state, and diesel-driven generator DG is bus III power supply.

In the present embodiment, when two fields are out of service with transformer AT1, AT2, diesel-driven generator DG starts, if diesel oil is sent out Motor DG capacity is sufficiently large, and diesel-driven generator DG can power (see Fig. 5) for bus I, bus II and bus III.

Certainly, above description is not limitation of the utility model, and the utility model is also not limited to the example above, this skill The those of ordinary skill in art field, in the scope of the utility model, variation, addition or the replacement made all should belong to this reality With novel protection scope.

Claims (2)

1. a kind of offshore boosting station field electricity system of ring connection, it is characterised in that: there is bus I, bus II and bus III, And field transformer AT1, AT2 and diesel-driven generator DG；

Its median generatrix I and bus II are normal power supply buses, and bus III is emergency service bus, and field is with transformer AT1 through inlet wire Switch S1 connection bus I, field is with transformer AT2 through incoming switch S4 connection bus II, and diesel-driven generator DG is through incoming switch S6 Connect bus III；

It is connected to the cable of bus connection switch S3 between the bus I and bus II to be connected, through being connected to mother between bus I and bus III The cable for joining switch S2, S8 is connected, and is connected between bus II and bus III through being connected to the cable of bus connection switch S5, S7, bus I, II, loop checking installation is constituted through cable connection between III.

2. the offshore boosting station field electricity system of ring connection as described in claim 1, it is characterised in that: opened by the inlet wire Close S1, S4, normal power supply system low-voltage distribution board cabinet that bus connection switch S2, S3, S5 and bus I, bus II are constituted with by described The emergency power supply system low-tension distribution board cabinet that incoming switch S6, bus connection switch S7, S8 and bus III are constituted is arranged separately at difference Room, between normal power supply system and emergency power supply system use cable connection.