CN201160223Y - A system of multiple ring sites - Google Patents

Abstract

A system of multiple ring substations, including several ring substations, is characterized in that: the power consumption of the common station of any ring substation in the system is connected to the distribution transformer of one of the other ring substations through wires, that is, by The latter provides the former with power for the regular station; the power for the backup station of any ring station in the system is connected to the distribution transformer of the ring station itself through wires, that is, the ring station provides itself with power for the backup station. Due to the adoption of the above technical scheme, the utility model can ensure the continuity of power consumption of the station when a fault occurs, and at the same time provide a strong guarantee for the success of power distribution automation fault judgment, isolation and restoration of power transmission.

Description

A system of multiple ring sites

technical field

The utility model relates to a power distribution automation system, in particular to a multiple ring power distribution system.

Background technique

In the distribution automation system, the extraction of control power and working power is a difficult point. At present, the more common practice is that the control power and working power of the power distribution terminal device and the switch in the station are all taken from the station power of the ring station. Figure 1 shows the structure of a traditional distribution automation double-loop network (taking the ring network composed of European-style box transformers as an example), including #1 ring network 111 and #2 ring network 112, and #1 ring network 111 includes #1 distribution transformer 15 , #1 station electricity 17, superior substation outlet circuit breaker 11 and load switch 12; The power consumption of the regular station of #1 ring station 111 is provided by its own ring station through the wire 19, and the power consumption of the standby station is provided by the wire 110 of the #2 ring station.

When a fault occurs at 13 places, the outlet circuit breaker 11 of the superior substation trips first, and because the load switch 14 is in the opening position, #1 distribution transformer 15 loses power, and #19 also loses power. At this moment, there are two events happening at the same time: (1) Due to the power failure of 19, the self-cutting device of #1 station power 17 operates, and the station power is switched to 110 from #2 distribution transformer, and the required time is 1 second about. During this 1 second, the power consumption of the station is always in the power-off state. (2) After a fault occurs, the distribution automation intelligent judgment program starts, and after the upper-level substation outlet circuit breaker 11 trips, the remote control load switch 12 trips immediately to isolate the fault. And at this time, #1 station power consumption 17 is switching, because the control power supply that provides load switch 12 tripping comes from #1 station power consumption 17, therefore, if the trip command sent to load switch 12 by the intelligent judgment program is just at #1 Within 1 second of the station power 17 switching, the load switch 12 will not trip due to no control power supply, resulting in fault isolation failure, and the #1 distribution transformer 15 cannot restore power supply from the #2 ring station 112 (due to the load Switch 12 does not trip, load switch 14 will not be able to switch on, otherwise load switch 14 will be closed in 13 places fault, cause bigger accident).

The problems of the above-mentioned double-ring substations also exist in multiple ring substations. Therefore, the traditional station power consumption (with self-cutting) structure cannot guarantee the continuity of station power consumption when a fault occurs, and cannot fully meet the needs of distribution automation.

Contents of the invention

The purpose of this utility model is to provide a system of multiple ring stations in order to solve the above problems.

The purpose of this utility model is achieved in this way: a system of multiple ring switches, including several ring switches, said ring switches include distribution transformers, station power and load switches, and the load switches are connected to the distribution transformers through wires , at the same time, each ring network is connected by a wire, and the wire is equipped with a load switch, which is characterized in that:

The power consumption of the common station of any ring station in the system is connected with the distribution transformer of one ring station in the other ring stations through wires, that is, the latter provides the former with the power consumption of the regular station;

The backup station power consumption of any ring station in the system is connected to the distribution transformer of the ring station itself through wires, that is, the ring station provides the backup station power for itself.

The number of said several ring sites can be three or four.

The utility model has the following advantages and characteristics due to the adoption of the above technical scheme:

1. It can ensure the continuity of power consumption of the station when a fault occurs;

2. Provide a strong guarantee for the success of power distribution automation fault judgment, isolation and restoration of power transmission.

Description of drawings

Figure 1 is a schematic structural diagram of a traditional distribution automation double-loop system;

Fig. 2 is a structural schematic diagram of multiple ring station systems of the present invention.

Detailed ways

Referring to Fig. 2, Fig. 2 is a schematic structural diagram of multiple ring station systems of the present invention. The system includes four ring sites, namely #1 ring site 21, #2 ring site 22, #3 ring site 23 and #4 ring site 24.

The #1 ring network 21 includes a superior substation outlet circuit breaker 25, a #1 distribution transformer 211, a #1 station power supply 212 and a load switch 214, which are connected to each other by wires;

The #2 ring station 22 includes a #2 distribution transformer 221, a #2 station power supply 222 and a load switch 223, which are connected to each other by wires;

The #3 ring station 23 includes a #3 distribution transformer 231, a #3 station power supply 232 and a load switch 233, which are connected to each other by wires;

The #4 ring station 24 includes a superior substation outlet circuit breaker 26, a #4 distribution transformer 241, a #4 station power supply 242 and a load switch 243, which are connected to each other by wires.

It is characterized by:

The power consumption of the regular station of the #1 ring station 21 is provided by the #3 ring station 23 through the wire 234, and the power consumption of the backup station is provided by the #1 ring station 21 itself through the wire 215;

The regular station power consumption of the #2 ring station 22 is provided by the #4 ring station 24 through the wire 225, and the backup station power supply is provided by the #2 ring station 22 itself through the wire 224;

The regular station of the #3 ring station 23 is provided by the #1 ring station 21 through the wire 216, and the power consumption of the standby station is provided by the #3 ring station 23 itself through the wire 235;

The regular station power consumption of described #4 ring station 24 is provided by #2 ring station 22 by wire 244, and the standby station power consumption is provided by #4 ring station 24 itself by wire 245;

Referring to Fig. 2, assuming that a fault occurs at 213, the outlet circuit breaker 25 of the superior substation trips, and the #1 ring site 21 is completely powered off. At this time, the #3 ring site 23 still has power, because the common station of the #1 ring site 21 uses electricity From #3 ring site 23, so the station power consumption of #1 ring site 21 remains continuous, meeting the needs of the intelligent judgment program remote control load switch 214, the load switch 214 trips immediately, and then the remote control load switch 233 closes, thereby ensuring power distribution automation The success of fault judgment, isolation and restoration of power transmission.

The utility model can ensure the continuity of power consumption of the station when a fault occurs, and provides a strong guarantee for the success of fault judgment, isolation and restoration of power distribution automation.

The above embodiments are only for illustrating the utility model, rather than limiting the utility model. Those skilled in the art can also make various transformations or modifications without departing from the spirit and scope of the utility model. Therefore, all equivalent technical solutions should also belong to the category of the present invention, and should be defined by each claim.

Claims (2)

1. a plurality of looped networks station system, comprise several looped network stations, described looped network station comprises distribution transformer, stand electricity consumption and on-load switch, on-load switch links to each other by lead with distribution transformer, simultaneously, link to each other by lead between each looped network station, and this lead is provided with on-load switch, it is characterized in that:

The distribution transformer at a looped network station in the described system in the station commonly used electricity consumption at arbitrary looped network station and all the other looped network stations links to each other by lead, promptly provides station electricity consumption commonly used by the latter for the former;

The distribution transformer of the standby station electricity consumption at arbitrary looped network station and this looped network station self links to each other by lead in the described system, promptly by this looped network station for the standby station electricity consumption is provided self.

2. a plurality of looped networks as claimed in claim 1 station system is characterized in that: the quantity at described several looped network stations can be three or four.

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