CN202886529U

CN202886529U - Pulse current line selection apparatus with remote alarm apparatus

Info

Publication number: CN202886529U
Application number: CN 201220488375
Authority: CN
Inventors: 陈浦生
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-09-24
Filing date: 2012-09-24
Publication date: 2013-04-17
Anticipated expiration: 2022-09-24

Abstract

The utility model discloses a pulse current line selection apparatus with a remote alarm apparatus, comprising a controller, wherein the controller is connected with the secondary side of a zero-sequence current transformer arranged on a branch, the output end of the controller is connected with a gate pole of a thyristor, a thyristor trigger is connected in series between the controller and the thyristor, the thyristor is connected in series between the neutral point of a grounding transformer and the ground, a current transformer is connected between a bus and the ground, inside the controller there is provided a remote alarm apparatus, the remote alarm apparatus is formed by an audio processor, a loudspeaker and an audio frequency receiver, and the controller is connected with the audio processor. The pulse current line selection apparatus with a remote alarm apparatus can determine a fault point and simultaneously gives an alarm signal for alarm in a grounding fault.

Description

A kind of pulse current route selection device with long-distance alarm apparatus

Technical field

The utility model relates to a kind of line selection apparatus, especially a kind of pulse current route selection device with long-distance alarm apparatus.

Background technology

In the not directly grounded system of the 3～66KV of China neutral point, singlephase earth fault is a kind of common fault.When singlephase earth fault occurs, because system's triple-phase line electric current still keeps balance, so electric power system still can normally be worked.According to the relevant regulations of safe operation of power system, during solidly grounded system generation singlephase earth fault, system is the longest can not power two hours neutral point, so the planted agent finds as soon as possible fault branch and in time processes during this period.For this reason, people have installed zero sequence current mutual inductor at the branch road of electric system, and the secondary side of all zero sequence current mutual inductors is electrically connected with controller.During by the detection single-phase earthing, flow through the size and Orientation of the capacitance current of each bar branch road, judge the branch road that earth fault occurs, such as the ground fault line selection device that is using online.But, this ground fault line selection device exists weak point, at first, the accuracy rate of route selection is low, its cause is for when system's generation singlephase earth fault, though the size of the zero sequence capacitance current of earth fault branch road be other branch road zero sequence capacitance currents vector with, but still too small, add the various disturbing factors that exist in the signals transmission, cause the accuracy rate of route selection to be difficult to guarantee; Secondly, even determined to occur the branch road of earth fault, yet ground connection has occured mutually in the fault branch which but still can not determine, can only just know at the scene and be out of order, and can not in time remind people to keep in repair, so there is defective in prior art, needs to improve

The utility model content

The technical problems to be solved in the utility model is for overcoming defects, when a speciogenesis earth fault is provided, can the localization of faults, and the pulse current route selection device with long-distance alarm apparatus that gives the alarm simultaneously and warn.

For solving technical matters of the present utility model, the technical scheme that adopts is: a kind of pulse current route selection device with long-distance alarm apparatus, comprise controller, and the zero sequence current mutual inductor secondary side that arranges on described controller and the branch road is connected; The output terminal of described controller is connected with the silicon controlled gate pole, is serially connected with silicon controlled toggle between controller and controllable silicon; Described controllable silicon is serially connected with between the neutral point and ground of grounding transformer; Described grounding transformer is connected with the bus that is connected with branch road; Cross-over connection has current transformer between described bus and the ground; The secondary side of described current transformer is electrically connected with the input end of controller; In the described controller long-distance alarm apparatus is set, described long-distance alarm apparatus is comprised of audio process, loudspeaker, audio receiver, described controller is connected with audio process, described audio process is connected with audio receiver, described audio receiver is connected with loudspeaker, and described loudspeaker places audio receiver inner;

Described long-distance alarm apparatus is also established sound-track engraving apparatus, and described sound-track engraving apparatus places audio receiver inner, is connected with audio receiver;

Be serially connected with the first fuse between described grounding transformer and the bus; Be serially connected with the second fuse between described current transformer and the bus.

Beneficial effect with respect to prior art is, employing is on the basis of the controller that is connected with zero sequence current mutual inductor secondary side on the branch road, be connected in series grounding transformer and controllable silicon between bus and the ground again, and current transformer, wherein, controllable silicon is serially connected with between the neutral point and ground of grounding transformer, its gate pole is electrically connected with the output terminal of controller, the technical scheme that the secondary side of current transformer is electrically connected with the input end of controller, so that as long as singlephase earth fault occurs, zero-sequence current when controller just can be obtained singlephase earth fault occurs by the current transformer place first, therefore and trigger controlled silicon conducting, making neutral point and fault branch all flow through stronger zero-sequence current, is that what branch road reaches the earth fault that how to have occured mutually wherein thereby determined.This branch road that can determine quickly and accurately to occur earth fault, can determine quickly and accurately simultaneously again the technical scheme of the phase of generation earth fault branch road, bring great convenience for the processing of fault, shortened widely the time of fault handling, made user's Electrical Safety obtain reliable assurance; And can not receive signal at the scene yet, in time remind people, greatly improve the monitoring automation degree of equipment;

As the further embodiment of beneficial effect, the one, preferably be serially connected with silicon controlled toggle between the output terminal of controller and the silicon controlled gate pole, not only be beneficial to the workload that alleviates controller, also be easy to controllable silicon is accurately controlled; The 2nd, between grounding transformer and the bus, preferably be serially connected with fuse between current transformer and the bus, be beneficial to the grounding transformer summation current transformer effectively protected and be convenient to it is carried out daily servicing; The 3rd, controller is preferably microcomputer or digital signal processor, except being easy to programming, also has versatility, characteristics that user interface is good.

Description of drawings

Fig. 1 is circuit diagram of the present utility model;

Fig. 2 is the circuit diagram of on-line monitoring system of the present utility model.

Embodiment

Below in conjunction with accompanying drawing optimal way of the present utility model is described in further detail.

As shown in Figure 1 and Figure 2, during this a kind of pulse current route selection device generation earth fault with long-distance alarm apparatus, can the localization of faults, give the alarm simultaneously and warn.This a kind of pulse current route selection device with long-distance alarm apparatus comprises controller 7, and zero sequence current mutual inductor 6 secondary sides that arrange on described controller 7 and the branch road are connected; The output terminal of described controller 7 is connected with the gate pole of controllable silicon 4, is serially connected with silicon controlled toggle 5 between controller 7 and controllable silicon 4; Described controllable silicon 4 is serially connected with between the neutral point and ground of grounding transformer 3; Described grounding transformer 3 is connected with the bus that is connected with branch road; Cross-over connection has current transformer 8 between described bus and the ground; The secondary side of described current transformer 8 is electrically connected with the input end of controller 7; Be serially connected with the first fuse 1 between described grounding transformer 3 and the bus; Be serially connected with the second fuse 2 between described current transformer 8 and the bus;

The described controller 7 interior long-distance alarm apparatus that arrange, described long-distance alarm apparatus is comprised of audio process 9, loudspeaker 12, audio receiver 11, described controller 7 is connected with audio process 9, described audio process 9 is connected with audio receiver 11, described audio receiver 11 is connected with loudspeaker 12, and described loudspeaker 12 places audio receiver 11 inside; Described long-distance alarm apparatus is also established sound-track engraving apparatus 13, and described sound-track engraving apparatus 13 places audio receiver 11 inside, is connected with audio receiver 11;

When the utility model normally moved in system, the neutral point current of grounding transformer 3 was zero or only has very low out-of-balance current, not conducting of controllable silicon; When system's generation singlephase earth fault, the neutral point current of grounding transformer raises and is phase current; The zero-sequence current that the current transformer 8 of this moment will be exported a larger generation singlephase earth fault is sent to controller, trigger rapidly controllable silicon 4 conductings by controller 7, and utilize controllable silicon 4 from turn-off function, make system only in half power frequency period of 10ms, be operated in the neutral-point solid ground state, thereby make neutral point and fault branch all flow through stronger zero sequence current signal; Zero sequence current mutual inductor 6 on the fault branch is uploaded to controller after detecting this stronger zero sequence current signal, controller is according to the output of the zero sequence current mutual inductor on current transformer 8 and the fault branch, and determining is that what branch road reaches the earth fault that how to have occured mutually wherein; When earth fault occurring, the audio process of long-distance alarm apparatus sends failure message to audio receiver by wire, after audio receiver is received information and is converted into sound wave, by loudspeaker 12 sound wave is sent, prompting people device fails, simultaneously, sound-track engraving apparatus 13 is lower with the sound wave record, uses in order to the later stage inquiry.

Obviously, those skilled in the art can carry out various changes and modification to pulse current route selection device of the present utility model and not break away from spirit and scope of the present utility model.Like this, if of the present utility model these are revised and modification belongs within the scope of the utility model claim and equivalent technologies thereof, then the utility model also is intended to comprise these changes and modification interior.

Claims

1. pulse current route selection device with long-distance alarm apparatus is characterized in that: comprise controller, the zero sequence current mutual inductor secondary side that arranges on described controller and the branch road is connected; The output terminal of described controller is connected with the silicon controlled gate pole, is serially connected with silicon controlled toggle between controller and controllable silicon; Described controllable silicon is serially connected with between the neutral point and ground of grounding transformer; Described grounding transformer is connected with the bus that is connected with branch road; Cross-over connection has current transformer between described bus and the ground; The secondary side of described current transformer is electrically connected with the input end of controller; In the described controller long-distance alarm apparatus is set, described long-distance alarm apparatus is comprised of audio process, loudspeaker, audio receiver, described controller is connected with audio process, described audio process is connected with audio receiver, described audio receiver is connected with loudspeaker, and described loudspeaker places audio receiver inner.

2. described a kind of pulse current route selection device with long-distance alarm apparatus according to claim 1, it is characterized in that: described long-distance alarm apparatus is also established sound-track engraving apparatus, and described sound-track engraving apparatus places audio receiver inner, is connected with audio receiver.

3. described a kind of pulse current route selection device with long-distance alarm apparatus according to claim 1 is characterized in that: be serially connected with the first fuse between described grounding transformer and the bus; Be serially connected with the second fuse between described current transformer and the bus.