KR102272727B1 - Apparatus for controlling breaker switchgear of electric power equipment - Google Patents

Abstract

The present invention relates to a switch control device for power control equipment capable of remotely automatically controlling a switch and also checking and notifying whether a switch is faulty or deteriorated, which is a gearbox that rotates a drive shaft through a motor rotational force. ; a switch having a lever member coupled to one side of the drive shaft to be rotated by the drive shaft, and determining whether to open or close the power circuit according to a rotation angle of the lever member; a rotating plate that is implemented to have a variable radius in the radial direction, is coupled to the other side of the drive shaft and rotates in the same pattern as the lever member; first and second relay elements that are distributed and spaced apart from the central axis of rotation of the rotating plate by the same distance and have different output signal values according to the rotation angle of the rotating plate; and a processor configured to control the operation of the gearbox in response to a control command transmitted from the outside, and to check and notify whether the switch is normally driven based on output signal values of the first and second relay elements.

Description

Apparatus for controlling breaker switchgear of electric power equipment

The present invention relates to a switch control device for a power control facility capable of remotely controlling a switch provided in a power control facility such as a photovoltaic junction panel and monitoring a switch state at the same time.

In general, a photovoltaic power generation system converts light energy into electrical energy, and includes a solar panel (module) that converts light energy into electrical energy and an inverter that converts DC power produced by the solar panel into AC power. do.

In addition, a photovoltaic connection panel that facilitates the wiring of many wires between the solar cell array and the inverter and performs various protection functions is additionally provided to connect parallel groups of appropriate arrays according to the photovoltaic cell array configuration and capacity for each array The cables are connected to the inverter, and the connections of multiple solar cell arrays are arranged in an easy-to-understand manner, and the circuit is separated during maintenance and inspection to facilitate the inspection work.

And as shown in FIG. 1, the solar connection panel is configured to include a switch 11, a lightning and surge protection element 12, a terminal block and a fuse 13, etc., and is used between the solar cell module and the inverter in the module. It is a device that collects the power required by the system by connecting the generated DC power in series/parallel to protect the inverter and prevent collision between modules and protect.

However, since the switch according to the prior art adopts a manual control structure as shown in FIG. 1 , it is inconvenient for a system administrator to directly visit a connection panel installation site and control the operation.

In addition, since the state monitoring technology for the switch itself has not yet been developed, there is a problem in that the effort and cost for maintaining the switch is unnecessarily increased. In other words, there is a problem in that the system administrator can determine whether the switch is malfunctioning only by visually checking the switch.

Domestic Registered Patent No. 10-1376548 (Registration Date March 14, 2014)

Accordingly, in order to solve the above problems, the present invention provides a switch control device for a power control facility capable of remotely and automatically controlling a switch.

In addition, there is provided a switch control device for a power control facility capable of confirming and notifying whether a switch is faulty or deteriorated.

The object of the present invention is not limited to the object mentioned above, and other objects not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the following description.

As a means for solving the above problems, according to an embodiment of the present invention, a gear box for rotating the drive shaft through a motor rotational force; a switch having a lever member coupled to one side of the drive shaft to be rotated by the drive shaft, and determining whether to open or close the power circuit according to a rotation angle of the lever member; a rotating plate that is implemented to have a variable radius in the radial direction, is coupled to the other side of the drive shaft and rotates in the same pattern as the lever member; first and second relay elements that are distributed and spaced apart from the central axis of rotation of the rotating plate by the same distance and have different output signal values according to the rotation angle of the rotating plate; A power control facility comprising a processor for controlling the operation of the gearbox in response to a control command transmitted from the outside, and checking and notifying whether the switch is normally operated based on the output signal values of the first and second relay elements A switch control device is provided for

The processor infers a switch state based on the output signal values of the first and second relay elements, and when receiving an open command, checks whether the switch enters an open state from a closed state through a floating state, and a closing command Upon reception, it is characterized in that the switch enters the closed state through the floating state from the open state, thereby confirming and notifying whether the switch is normally operated.

The processor may further include a function of additionally confirming and notifying whether deterioration has occurred by counting the time required for the change of state and comparing and analyzing it with a preset time.

In addition, the processor is characterized in that it further comprises a function of generating and outputting an alarm by checking a state change in a state in which the control command is not received.

In addition, the switch control device for the power control facility is attached to any one of the switch, the gear box, and the rotating plate, the switch is forcibly closed, an impact detection sensor for sensing and outputting an external shock generated; and a rotation plate position detection sensor for detecting and notifying a floating state by sensing and analyzing the rotation angle of the rotation plate. It is characterized in that it further comprises at least one of.

In this case, the processor may further include a function of generating and outputting an alarm signal corresponding to a sensing result of at least one of the impact detection sensor and the rotation plate position detection sensor.

The present invention allows a switch to be automatically controlled remotely, and to check and notify whether a switch is faulty or deteriorated, so that the time, effort, and cost required for maintenance of power control equipment can be more effectively reduced. do.

1 is a view showing an example of a solar connection panel.
2 is a view for explaining a switch control device for power control equipment according to an embodiment of the present invention.
3 is a view showing an example of a gear box according to an embodiment of the present invention.
4 to 6 are diagrams illustrating an example of implementation of a rotary plate and a relay device according to an embodiment of the present invention.
7 is a view showing a rotational plate rotation angle change pattern according to a switch state change according to an embodiment of the present invention.
8 to 10 are diagrams for explaining a method for controlling a switch for a power control facility according to an embodiment of the present invention.

Objects and effects of the present invention, and technical configurations for achieving them will become clear with reference to the embodiments described below in detail in conjunction with the accompanying drawings. In describing the present invention, if it is determined that a detailed description of a well-known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

In addition, the terms described below are terms defined in consideration of functions in the present invention, which may vary according to intentions or customs of users and operators.

However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms. Only the present embodiments are provided so that the disclosure of the present invention is complete, and to fully inform those of ordinary skill in the art to which the present invention belongs, the scope of the invention, the present invention is defined by the scope of the claims will only be Therefore, the definition should be made based on the content throughout this specification.

2 is a view for explaining a switch control device for power control equipment according to an embodiment of the present invention.

As shown in FIG. 2 , the switch control device 100 of the present invention includes a gear box 110 , a switch 120 , a rotary plate 130 , first and second relay elements 141 and 142 , a processor 150 , and the like. Including, in this case, the switch 120 may be a switchboard or a circuit breaker provided in a switchboard, a distribution board, a connection board, and the like.

The gear box 110 is configured by successively meshing n (n is a natural number of 2 or more) gears 111, 112, and 113 having different diameters from each other as in FIG. 3, and the rotational force of the motor 114 is desired according to the gear ratio of these gears. It is a device that rotates its own drive shaft 115 by decelerating it as much as possible.

The switch 120 is coupled to one side of the drive shaft 115 of the gear box 110 and has a lever member rotated by the drive shaft 115 of the gear box 110, and a power circuit according to the rotation angle of the lever member It is a device that determines whether to open or close the In this case, the lever member is implemented in the form of a handle, and it is of course natural that the user may decide whether to open or close the power circuit by directly rotating it.

The rotating plate 130 is coupled to the other side of the drive shaft 115 of the gear box 110 and rotates in the same pattern as the lever member of the switch 120 . In this case, the rotating plate 130 is implemented in a shape having a variable radius in the radial direction.

The first and second relay elements 141 and 142 are distributed to be spaced apart from the central axis of the rotating plate 130 by the same distance, and output signal values are differently output according to the rotation angle of the rotating plate 130 .

That is, the present invention additionally includes the rotating plate 130 and the first and second relay elements 141 and 142 as in FIG. 4 , and through them, the current state of the switch can be indirectly measured.

For example, the first and second relay elements 141 and 142 of the present invention output S1 = L, S2 = H when the rotation angle θ of the rotating plate 130 is 0 degrees as shown in FIG. 5, At 90 degrees, S1 = H, S2 = H, and at 180 degrees, S1 = H, S2 = L, and at 270 degrees, S1 = L, S2 = H can be output. Through the output signal values of the second relay elements 141 and 142 , it is possible to inversely estimate the rotation angle of the rotary plate 130 or the lever member, and further, whether the switch is opened or closed.

Subsequently, the processor 150 receives a control command generated and transmitted by an external device such as a user operation panel or a central control room, and in response to the operation control of the gear box 110, the switch 120 operates the gear box ( (110) so that it can be automatically opened or closed by the rotational force provided.

In addition, by indirectly measuring the current state of the switch 120 based on the output signals of the first and second relay elements 141 and 142 , it is also possible to determine whether the switch 120 is normally driven therefrom.

The processor 150 is installed outside the power control facility to remotely control one switch 1:1. In addition, it may be implemented in the form of integrated control of a plurality of switches. In this case, after allocating a unique address to each of the plurality of switches, a control target device can be identified and individually controlled based on the address.

In addition, power control facilities such as switchboards, distribution boards, and connection boards basically provide a function of forcibly closing the switches (ie, switchgear, circuit breaker) provided in themselves when abnormal phenomena such as overcurrent and overtemperature occur.

Accordingly, in the present invention, as shown in FIG. 7 , it is attached to any one of the switch 120 , the gear box 110 , and the rotating plate 130 , and as the switch 120 is forcibly closed, an external shock applied to the rotating plate 130 is reduced. A shock detection sensor 160 for sensing and output may be further included. And at this time, the processor 150 generates and outputs an alarm notifying that the switch is forcibly closed based on the sensing result to the shock sensor, so that the system administrator can additionally recognize the occurrence of the corresponding state.

In addition, if the first and second relay elements 141 and 142 are deteriorated due to aging of the system, even if an abnormal operation in which the switch 120 in the closed or open state changes to the floating state occurs, it is impossible to detect it.

Accordingly, the present invention further includes a rotation plate position detection sensor 170 for detecting and notifying the floating state by sensing and analyzing the rotation angle of the rotation plate, and through this, the current state of the switch can be checked over and over again.

At this time, the rotating plate position detection sensor 170 detects the rotating plate from the camera 171 and the camera image for photographing the rotating plate as shown in FIG. 6A, and an image processing module for identifying and notifying the floating state through the relative position of the protruding edge of the rotating plate ( 172) may be composed.

Alternatively, the first and second light emitting diodes (LED1, LED2), the first and second light emitting diodes facing each other, irradiating light to the contact positions of the first and second relay elements 141 and 142, respectively, as shown in FIG. 6b The current position of the rotating plate according to the light reception result of the first and second light receiving diodes PD1 and PD2 installed opposite to the furnace rotating plate, the illuminance sensor LS sensing the change in illuminance caused by disturbance light, and the first and second light receiving diodes It may be composed of a rotating plate position detection unit 173 that identifies and informs whether the floating state is additionally confirmed therefrom. That is, when only the first light-receiving diode PD1 receives the light of the first light-emitting diode LED1, the rotation angle θ is 0 degrees, and both the first and second light-receiving diodes PD1 and PD2 do not receive the light. If not, the rotation angle θ is 90 degrees, when only the second light receiving diode PD2 receives the light of the second light emitting diode LED2, the rotation angle θ is 180 degrees, the first and second light receiving diodes When both (PD1, PD2) receive light, it can be confirmed that the rotation angle (θ) is 270 degrees.

7 is a view showing a rotational plate rotation angle change pattern according to a switch state change according to an embodiment of the present invention.

First, when the switch is changed from the closed state to the open state as shown in (a) of FIG. 7, the rotation angle of the rotating plate is continuously changed from 0 degrees to 180 degrees, and the first and second relay elements 141 and 142 at this time The output signal values are sequentially changed to (S1=L, S2=H), (S1=H, S2=H), and (S1=H, S2=L).

On the other hand, when the switch is changed from the open state to the open state as shown in (b) of FIG. 7 , the rotation angle of the rotary plate is continuously changed from 180 degrees to 0 degrees, and accordingly, the first and second relay elements 141 and 142 are The output signal values are sequentially changed to (S1=H, S2=L), (S1=L, S2=L), and (S1=L, S2=H).

If the switch operates normally, the first and second relay elements 141 and 142 always generate and output an output signal value that changes in the pattern of FIG. 7A or 7B.

On the other hand, if the switch fails and the switch lever does not move or the switch lever does not rotate in the original direction, the first and second relay elements 141 and 142 generate and output output signal values that do not follow the change pattern. .

Also, when the performance of the switch is deteriorated, the rotation speed of the switch may be abnormally slow, and as a result, the change speed of the output signal value of the first and second relay elements 141 and 142 is also abnormally slow.

Accordingly, in the present invention, the rotating plate 130 and the first and second relay elements 141 and 142 are additionally provided, and through them, the current state of the switch is indirectly measured, and furthermore, it is possible to check and notify whether there is a failure or deterioration. .

8 to 10 are diagrams for explaining a switch control method for a power control facility according to an embodiment of the present invention.

First, when initial power is applied to the switch control device (S1), the processor 150 checks the current state of the switch 120 through the first and second relay elements 141 and 142 (S2).

If the switch 120 is in the floating state, not in the open or closed state (S1 = S2 = L or S1 = S2 = H), the motor of the gear box 110 is operated to enter the switch 120 into the closed state. (S1=L, S2=H)(S3).

In this state, when a switch open command is remotely transmitted from an external device (S4), the processor 150 starts to drive the motor of the gear box 110 so that the switch that was in the closed state goes through the floating state to the open state ( S5).

Simultaneously with performing step S5, the switch state change is indirectly measured through the output signal values of the first and second relay elements 141 and 142 (S6 to S9). That is, it is checked whether the switch from the closed state is changed to the open state through the floating state (S6, S7), and at the same time, the first time from the closed state to the floating state and the first time until the floating state is changed to the open state to count the second time of (S8, S9).

If the state of the switch does not change at all, it is confirmed and notified that the switch is in a state of complete failure, and if at least one of the first time and the second time is greater than the preset time, it is confirmed and notified that the switch is in a deteriorated state (S10) ).

On the other hand, when the switch normally enters the open state through the floating state, the processor 150 confirms that the switch is in the normal operating state and immediately terminates the driving of the gearbox motor ( S11 ).

Then, while maintaining the current state of the switch, the first and second relay elements 141 and 142 are additionally checked at a preset cycle (S12), and through this, it is checked whether a state change occurs (S13).

If the state of the switch is changed even though an external command is not separately received, an alarm is generated and output to notify the external device or the system manager, so that the related follow-up action can be immediately processed (S14).

In the same way, when a switch closing command is input in the switch open state (S15), the processor 150 drives the motor of the gearbox 110 again so that the switch that was in the open state goes through the floating state to the closed state ( S16).

Then, it is checked whether the switch that was in the open state is changed to the closed state through the floating state (S17, S18), and also the third time from the open state to the floating state and the third time until the change from the floating state to the closed state. Count 4 hours (S19, S20).

And if the state of the switch does not change at all, it is confirmed and notified that the switch is in a state of complete failure, and when at least one of the third time or the fourth time is greater than the preset time, it is confirmed and notified that the switch is in a deteriorated state (S21) .

On the other hand, when the switch normally enters the closed state through the floating state, the processor 150 confirms that the switch is in the normal operating state and immediately terminates the driving of the gearbox motor (S22).

Even at this time, while the current state of the switch is maintained, the first and second relay elements 141 and 142 are additionally checked at a preset cycle (S23), and through this, it is checked whether a state change occurs (S24).

If the state of the switch is changed even though an external command is not separately received, an alarm is generated and output to notify an external device or a system manager, so that a related follow-up action can be immediately processed (S25).

The above description is merely illustrative of the technical spirit of the present invention, and various modifications and variations will be possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed by the following claims, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

Claims (6)

a gearbox that rotates the drive shaft through the motor torque;
a switch having a lever member coupled to one side of the drive shaft to be rotated by the drive shaft, and determining whether to open or close the power circuit according to a rotation angle of the lever member;
a rotating plate that is implemented to have a variable radius in the radial direction, is coupled to the other side of the drive shaft and rotates in the same pattern as the lever member;
first and second relay elements that are distributed and spaced apart from the rotation center axis of the rotation plate by the same distance and have different output signal values according to the rotation angle of the rotation plate;
In response to a control command transmitted from the outside, but controlling the operation of the gearbox, based on the output signal values of the first and second relay elements, comprising a processor for confirming and notifying whether the normal operation of the switch,
the processor
A switch state is inferred based on the output signal values of the first and second relay elements, and when an open command is received, it is checked whether the switch enters an open state through a floating state from a closed state, and when a closing command is received A switch control device for power control equipment, characterized in that by confirming that the switch enters the closed state from the open state through the floating state, confirming and notifying whether the switch is normally driven. delete The method of claim 1, wherein the processor is
The switch control device for power control equipment, characterized in that it further comprises a function of counting the time required for the change of state, and comparing and analyzing it with the preset time to further confirm and notify whether deterioration has occurred. The method of claim 1, wherein the processor is
Switch control device for power control equipment, characterized in that it further comprises a function of generating and outputting an alarm by checking a state change in a state in which a control command is not received. According to claim 1,
an impact sensor attached to any one of the switch, the gear box, and the rotating plate to sense and output an external shock generated as the switch is forcibly closed; and
Rotating plate position detection sensor for sensing and analyzing the rotation angle of the rotating plate to check and notify the floating state; Switch control device for power control equipment, characterized in that it further comprises at least one of. 6. The method of claim 5, wherein the processor
The switch control device for power control equipment, characterized in that it further comprises a function of generating and outputting an alarm signal corresponding to a sensing result of at least one of the impact sensor and the rotation plate position detection sensor.

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