CN204992551U

CN204992551U - Network reconsitution equipment during 10kV feeder trouble

Info

Publication number: CN204992551U
Application number: CN201520611457.6U
Authority: CN
Inventors: 贾冬霞
Original assignee: QUANZHOU WELLDONE ELECTRIC CO Ltd
Current assignee: QUANZHOU WELLDONE ELECTRIC CO Ltd
Priority date: 2015-08-14
Filing date: 2015-08-14
Publication date: 2016-01-20
Anticipated expiration: 2025-08-14

Abstract

The utility model discloses a network reconsitution equipment during 10kV feeder trouble, include on 10kV feeder main line the coincident ware and a plurality of sectionalizer that set up, the port department that is qualified for the next round of competitions of being close to the transformer substation at the 10kV feeder line is installed to the coincidence ware, a plurality of sectionalizers 10kV feeder line that puts in series, and it has six voltage sensor and six current transformer all to embed on a plurality of sectionalizers. The utility model discloses can reduce network reconsitution time, effectively shorten after the trouble time that non - fault section resumes the power supply.

Description

Network reconfiguration equipment during a kind of 10kV feeder fault

Technical field

The utility model relates to 10kV feeder automation applied technical field, particularly relates to network reconfiguration equipment during a kind of 10kV feeder fault.

Background technology

Due to the impact of natural calamity or other factors, transmission line suffers damage unavoidably, occurs connecing fault.10kv overhead transmission line most common failure has short trouble, and short trouble comprises the following two kinds situation: one is circuit instantaneity short trouble (being generally the success of circuit breaker reclosing); Two is the permanent short trouble of circuit (being generally that circuit breaker reclosing is unsuccessful).

The permanent short trouble of circuit, the outlet breaker in transformer station can trip, and operator on duty, according to trip condition, clearly can inform which bar feeder line of feeder line operation maintenance personnel there occurs short trouble.The mode of general operation maintenance personnel process circuit short trouble---coordinate with transformer station outlet switch, carry out segmentation examination to the circuit breaker on faulty line or on-load switch to draw, try to send, the examination coordinated each other according to circuit breaker on transformer station's outlet switch, circuit is drawn, try the outlet switch trip condition passing through transformer station in journey and process, determines fault section.The method length consuming time of artificial treatment fault, and have certain threat to the personal safety fault in-situ operating personnel.、

Utility model content

Based on the technical problem that background technology exists, the utility model proposes network reconfiguration equipment during a kind of 10kV feeder fault.

Network reconfiguration equipment during a kind of 10kV feeder fault that the utility model proposes, be included in automatic circuit and multiple sectionalizer that 10kV feeder line is arranged, automatic circuit is arranged on the feeder line leading-out terminal of the close transformer station of 10kV feeder line, on multiple intelligent sectionalizer series connection access 10kV feeder main, built-in six voltage sensors of sectionalizer and six current transformers.The multiple physical parameter such as electric current, voltage, zero-sequence current, residual voltage gathering this automatic circuit or sectionalizer is responsible for by the controller of automatic circuit and sectionalizer, physical criteria is formed after CPU computing, again according to the situation of change of physical parameter in network reconfiguration process, do not need communication can realize automatic separating fault section, ensure the function of the normal operation of non-faulting section to greatest extent.

Preferably, voltage sensor is used for the change in voltage situation of sense switch both sides and the size of residual voltage and phase angle, and current transformer is used for the power frequency that flows through in sense switch and harmonic current, the size of residual voltage and phase angle.

Network reconfiguration equipment during a kind of 10kV feeder fault that the utility model proposes, the automatic circuit that 10kV feeder line is arranged and multiple sectionalizer, automatic circuit is arranged on the input of 10kV feeder line and the feeder line near transformer station exports output, multiple intelligent sectionalizer series connection access 10kV feeder line, six voltage sensor senses devices and current sensing means instrument transformer is equipped with on multiple sectionalizer, if unsuccessful reclosing, judges that this line fault is permanent fault for the first time, sectionalizer now on backbone twice decompression count down to, by the sectionalizer separating brake on all major networks on 10kV feeder line, then according to voltage, curent change situation and time coordination isolated fault section, recover the normal power supply of non-faulting section, in the fault recognition time delay Y time of sectionalizer after combined floodgate, if decompression again do not detected, then this sectionalizer cuts out its decompression separating brake function in short-term, thus forms network reconfiguration, reduce the time shortening network reconfiguration, the time of restoring power supply in non-broken-down section after effective saving fault.

Accompanying drawing explanation

The structural representation of network reconfiguration equipment when Fig. 1 is a kind of 10kV feeder fault that the utility model proposes.

Embodiment

As shown in Figure 1, the structural representation of network reconfiguration equipment when Fig. 1 is a kind of 10kV feeder fault that the utility model proposes.

With reference to Fig. 1, network reconfiguration equipment during a kind of 10kV feeder fault that the utility model proposes, be included in the automatic circuit CH1 that 10kV feeder line is arranged, CH2, multiple sectionalizer F1 ~ F4 and handle switch L, multiple sectionalizer comprises sectionalizer F1, sectionalizer F2, sectionalizer F3 and sectionalizer F4, between the line outlet place CH1 that automatic circuit LCH1 ~ 2 are arranged on the close transformer station of 10kV feeder line and transformer station CH2, sectionalizer F1, sectionalizer F2, sectionalizer F3 and sectionalizer F4 connects and accesses 10kV feeder line, automatic circuit handle switch L is positioned at sectionalizer F2, between sectionalizer F3, each sectionalizer is all built-in with six voltage sensors and six current transformers, the time relay be connected in series to voltage sensor and with corresponding sectionalizer, current transformer is in parallel.

The utility model also proposed network reconstruction method during a kind of 10kV feeder fault, comprises the steps:

If S1 feeder line there occurs short trouble, automatic circuit first time tripping operation.Whether be transient fault to offer an explanation fault, the first time reclosing of substation exit automatic circuit be used for the 10kV feeder line fault getting rid of instantaneity, if first time unsuccessful reclosing; judge that this line fault is permanent short trouble;

Sectionalizer on S2, backbone twice decompression count down to, and by the sectionalizer separating brake on all major networks on 10kV feeder line in S1, then according to voltage, curent change situation and time coordination isolated fault section, recovers the normal power supply of non-faulting section;

In S3, S2 in the fault recognition time delay Y time of sectionalizer after combined floodgate, if decompression again do not detected, then this sectionalizer cuts out its decompression separating brake function in short-term, thus effectively shortens the formation network reconfiguration time after fault generation.

In a particular embodiment, in S3, Y=2s in the fault recognition time delay Y time after sectionalizer closes a floodgate.

Suppose that short trouble occurs in sectionalizer F2 and sectionalizer F3 and shakes hands between switch L, automatic circuit CH1 near electric substation's outlet trips rapidly, then first time overlaps (for whether failure judgement is transient fault), if unsuccessful reclosing, and second time tripping operation.Handle switch starts side decompression X timing, and sectionalizer F1, F2 twice decompression now on backbone count down to separating brake.Send instruction and disconnect sectionalizer F2 and sectionalizer F3, the supply line between two stations is together excised together with fault.Meanwhile, electric substation CH2 starts rapidly automatic closing function, and special line automatic circuit CH1 third time closes a floodgate, and sectionalizer F1 side is detected has pressure time-delay closing, faultless voltage pulse in the Y time, automatically closes its decompression separating brake function in short-term; F2 side is detected pressure time-delay closing, but closes in fault; Automatic circuit CH1 third time tripping operation; Because F2 detects voltage failure pulse within the Y time, the switch L of simultaneously shaking hands detects voltage failure pulse in side decompression timing X, F2 automatic brake separating after CH1 third time tripping operation locking, switch automatic blocking under gate-dividing state of simultaneously shaking hands.

CH1 overlaps for the 4th time, because F1 closes its decompression separating brake function in short-term, does not need to perform separating brake and time-delay closing operation again, effectively shorten the time of network reconfiguration, so far network reconfiguration terminates, and except having a power failure between fault section F2 to handle switch L, other non-faulting regions all power normally.Supply power to sectionalizer F4, complete the power supply to sectionalizer F3 and sectionalizer F4.The utility model reduces time of network reconfiguration, effectively saves the time shortening restoring power supply in non-broken-down section after fault.

The above; be only the utility model preferably embodiment; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; be equal to according to the technical solution of the utility model and utility model design thereof and replace or change, all should be encompassed within protection range of the present utility model.

Claims

1. a network reconfiguration equipment during 10kV feeder fault, it is characterized in that, be included in automatic circuit and multiple sectionalizer that 10kV feeder line is installed, automatic circuit is arranged on the feeder line port of export of 10kV feeder line near transformer station, multiple sectionalizer series connection access 10kV feeder line, multiple sectionalizer is all built-in with six voltage sensors and six current transformers.

2. network reconfiguration equipment during 10kV feeder fault according to claim 1, it is characterized in that, voltage sensor is used for the change in voltage situation of sense switch both sides and the size of residual voltage and phase angle, and current transformer is used for the power frequency that flows through in sense switch and harmonic current, the size of residual voltage and phase angle.