CN210007474U

CN210007474U - remote reclosing device

Info

Publication number: CN210007474U
Application number: CN201920930377.5U
Authority: CN
Inventors: 张威; 魏中原; 王斌; 张永; 汪伟鸣; 熊斌; 奚俊; 马玉
Original assignee: State Grid Corp of China SGCC; Xuancheng Power Supply Co of State Grid Anhui Electric Power Co Ltd
Current assignee: State Grid Corp of China SGCC; Xuancheng Power Supply Co of State Grid Anhui Electric Power Co Ltd
Priority date: 2019-06-19
Filing date: 2019-06-19
Publication date: 2020-01-31
Anticipated expiration: 2029-06-19

Abstract

The utility model discloses an distant place switching-on/off reclosing device, include the latching relay and be used for the power module of power supply, the latching relay includes the normally closed contact and the normally open contact of linkage, wherein, inserts reclosing switching-on/off hard clamp plate on the reclosing physics return circuit that draws forth among the switch protection device in the transformer substation with the normally closed contact, withdraw from telesignalling return circuit access that draws from transformer substation measurement and control device the normally open contact, normally open contact is as reclosing state feedback end, and the remote control that draws from transformer substation measurement and control device drops into return circuit, remote control withdraw from the return circuit and is regarded as the contact conducting state switching circuit of latching relay through remote control, makes reclosing physics return circuit closed or cut off, feeds back the loop state of device control to the control end in real time simultaneously, realizes the reliable change of reclosing state in the aspect of , ensures work safety, realizes distant place control in addition in the aspect of , reduces operating cost.

Description

remote reclosing device

Technical Field

The utility model relates to a device of switch reclosing lock state of moving back in kinds of remote control transformer substations.

Background

The reclosing of the switch in the transformer substation is mainly matched with the protection action of the switch, and the switching-in state and the switching-out state of the reclosing are frequently required to be changed along with the arrangement of electric power work.

At present, the switching-in and switching-out states of the reclosure are changed mainly in the following two ways.

the method is hard pressing plate, the operator changes the state of the hard pressing plate of the reclosing switch cabinet on the transformer substation to cut off the control loop of the reclosing, because the control loop is cut off on the physical layer, the switching on and off of the reclosing is reliable, the method is adopted like in the actual work, but the defect is that the operation must be carried out on the spot and can not be operated remotely.

And in addition, modes are a soft pressure plate mode, the switching-on and switching-off states of the reclosure are changed in a software mode by changing specific control words in the protection device, the mode can be operated on site or modified remotely, but the physical loop of the reclosure is still closed aiming at the change of the control words, so that the reclosure can not be reliably withdrawn, the reclosure state is difficult to monitor in real time, potential safety hazards are caused, and the mode is not used in mode in actual work.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an kinds of distant places throw and retreat reclosing device, when the switch reclosing state in needs change transformer substation, through distant control, make the physical loop of reclosing close or cut off, feed back the loop status of device control to the control end in real time simultaneously.

Therefore, the utility model provides an kinds of distant place throw-retreat reclosing devices cooperate with the interior switch protection device of transformer substation measuring and control device and transformer substation to realize the distant place throw-retreat reclosing of switch in the transformer substation, including self-sustaining relay and the power module that is used for the power supply, self-sustaining relay includes linkage normally closed contact and normally open contact, wherein, insert the hard clamp plate of reclosing throw-retreat and the normally closed contact on the physical return circuit of reclosing that draws forth in the interior switch protection device of transformer substation, the remote signaling return circuit that withdraws from transformer substation measuring and control device inserts normally open contact, normally open contact is as reclosing state feedback end, and the remote control that draws forth from transformer substation measuring and control device drops out the return circuit and is regarded as the contact conducting state switching loop of self-sustaining relay, wherein, when transformer substation measuring and control device received the heavy input control signal from the control end, the remote control drops out the return circuit and closes.

The device can be remotely controlled, so that the operation of operators arriving at a transformer substation site is not required in a hard pressing plate mode, and the operation time, labor and traffic cost are saved; meanwhile, the device directly controls the on-off of a physical circuit of the reclosure, so that the reclosure device is more reliable than a soft pressing plate mode, the monitoring of the control state is more reliable through the physical design, and a signal prompt can be sent in time when the related control state is changed accidentally, so that the potential safety hazard is avoided; in addition, the self-holding relay is adopted in the device, so that the previous on-off state can be maintained under the condition of power failure of the device and the like, the sudden change of the reclosing state caused by faults is prevented, and the related work safety is guaranteed.

In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages as will become apparent from the following detailed description which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which form a part of the specification , are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention properly, in which:

fig. 1 is a block diagram of a remote reclosing device according to the present invention.

Description of the reference numerals

1. A remote switching reclosing device; 2. A transformer substation measurement and control device;

3. a switch protection device in the substation; 4. A step-down power supply module;

5. a self-holding relay; 6. A normally closed contact;

7. a normally open contact; 8. Reclosing a physical loop;

9. and (5) switching on and off the hard pressing plate by reclosing.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

The structure and wiring of the device are shown in figure 1. In the existing hard pressing plate mode, a reclosing switch on/off hard pressing plate 9 and a normally closed contact 6 are connected to a reclosing switch physical loop 8 led out from a switch protection device 3 in a transformer substation, and when the reclosing switch on/off hard pressing plate 9 is opened, a path is disconnected, and the reclosing switch is withdrawn.

When the device is used normally, the reclosing on/off hard pressing plate 9 is normally set in a conducting state without special requirements. When receiving a control signal of switching to reclosing input from a control end, the transformer substation measurement and control device 2 sends a positive pulse to the self-holding relay 5 to control the displacement of a reed in the self-holding relay 5, the normally-closed contact 6 is closed, the normally-open contact 7 is opened, the reclosing physical loop 8 is closed, the reclosing input is started, and meanwhile, a monitoring loop of the transformer substation measurement and control device 2 is opened to return a signal of reclosing input.

When receiving a control signal of switching from a control end to a reclosing exit, the transformer substation measurement and control device 2 sends a negative pulse to the latching relay 5 to control the displacement of a reed in the latching relay 5, the normally closed contact 6 is opened, the normally open contact 7 is closed, the reclosing physical loop 8 is opened at the moment, the reclosing exits, and meanwhile, a monitoring loop of the transformer substation measurement and control device 2 is closed and returns a signal of reclosing exit.

Because the normally closed contact 6 and the normally open contact 7 share the same reed, when the device is in power failure or fault, the substation measurement and control device 2 can still accurately reflect the switching-on/off state of the reclosure, and the switching-on/off state can be maintained in the previous switching-on/off state under the control of the self-holding relay 5, so that the reliability of the device is ensured.

The device is powered by a direct current power supply in a transformer substation, receives a remote control signal of the electric power monitoring system, and when the signal is switched to be switched into a reclosing switch, the measurement and control device sends a positive pulse to the self-holding relay to control the normally closed contact connected into a physical circuit of the reclosing switch to be switched on, and the reclosing state controlled by the device is still switched into. When the remote control signal is switched to be reclosed and quit, the measurement and control device sends negative pulse to the self-holding relay, a normally closed contact in the reclosing physical loop is disconnected, the reclosing physical loop is cut off, and the reclosing state is quit.

The normally open type contact sharing conduction reeds with the normally closed type contact is used as a reclosing state feedback end controlled by the device, physical locking is realized due to the sharing of the conduction reeds, the conduction state of the normally closed type contact is opposite to that of the normally open type contact, when the normally open type contact is conducted, the reclosing exit state in the power monitoring system is corresponded, and when the normally open type contact is not conducted, the reclosing input state in the power monitoring system is corresponded.

In the embodiment, the self-holding relay is a magnetic holding double-coil relay MY2K24DC of Onglong company, the voltage-reducing power module is an AC-DC power module NE03-A24 of Nbocicly company, and the measurement and control device and the protection device are type equipment, namely a comprehensive protection digital line protection measurement and control device of PSL641U of Nanjing south China.

Because the device can be remotely controlled, the operation of an operator arriving at a transformer substation site is not required in a hard pressing plate mode; the device directly controls the on-off of the reclosing physical loop, so that the reclosing physical loop is more reliable than a soft pressing plate mode, monitoring can be realized, and feedback can be timely obtained when the related control state is changed accidentally; the device adopts the contact of the self-holding relay to access the loop, so that the device can still keep the previous on-off state when the device fails to work, and the like, thereby avoiding the potential safety hazard of work.

On the basis of keeping the reclosing operation of the hard pressure plate mode and the soft pressure plate mode, the device adds a new remote reclosing operation mode, realizes the reliable change of the reclosing state in aspects, ensures the working safety, realizes remote control in aspects and reduces the operation cost.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

The remote switching reclosing devices are characterized by being matched with a transformer substation measurement and control device (2) and a transformer substation internal switch protection device (3) to realize remote switching reclosing of a transformer substation internal switch, and comprise a self-holding relay (5) and a power supply module (4) for supplying power,

the self-holding relay (5) comprises a normally closed contact (6) and a normally open contact (7) which are linked, wherein a reclosing switching hard pressing plate (9) and the normally closed contact (6) are connected to a reclosing physical loop (8) led out from a switch protection device (3) in the transformer substation, a withdrawing telecommand loop led out from a transformer substation measurement and control device (2) is connected to the normally open contact (7), and the normally open contact (7) is used as a reclosing state feedback end,

a remote control input loop and a remote control exit loop which are led out from the transformer substation measurement and control device (2) are used as contact conduction state switching loops of the self-holding relay (5), wherein when the transformer substation measurement and control device (2) receives a reclosing input control signal from a control end, the remote control input loop is closed; and when the substation measurement and control device (2) receives a reclosing exit control signal from the control end, the remote control exit loop is closed.