KR200440342Y1 - The digital controller for the automatic voltage static switch - Google Patents

Abstract

The present invention relates to a digital controller that enables the control of the existing voltage-switching switch in the field and remote. The self-diagnosis function according to the digital MCU is added to check the normal operation, the digital input contact point and the digital output contact point. The purpose is to make it easy to check through.

The present invention for achieving the characteristic object is a digital input unit 11 for operating a photo coupler (Photo Coupler) inside the controller after receiving the power power supplied from the outside; A self-diagnostic part 12 which performs a self-diagnosis to check an operation state of the controller and turns on the status display lamp A; When the photocoupler inside the controller operates using the received input power, the sequencer 13 processes the internal display to operate the status display lamp and the digital output; A digital logic gate 14 for displaying an operating state of the controller according to the digital input and preventing external noise from flowing in; And a digital output unit 15 including 17 channels divided into a local and a remote area (SCADA). It includes.

Automatic Voltage Transfer Switch, Digital Controller, Self Diagnosis, Status Indicator Lamp, Digital Logic Gate, Digital MCU

Description

Digital controller for the automatic voltage transfer switch

1a and 1b is an external view showing a conventional voltage switching switch,

2 is a view showing a PCB board to the automatic voltage transfer switch improved by adding a PCB board,

3A is a block diagram illustrating a digital controller for an automatic voltage transfer switch according to an external connection according to an embodiment of the present invention;

3b is a circuit diagram showing a digital controller for an automatic voltage transfer switch according to an external connection according to an embodiment of the present invention;

4 is an external view showing a digital controller for an automatic voltage transfer switch according to an embodiment of the present invention;

5 is a view showing the inside of a digital controller for an automatic voltage transfer switch according to an embodiment of the present invention;

*** Explanation of symbols for the main parts of the drawing ***

10: Digital controller for automatic voltage transfer switch

11 digital input 12 self-diagnosis

13 sequence processor 14 digital logic gate

141: digital MCU 15: digital output unit

16: test confirmation unit 17: remote control unit

The present invention relates to a digital controller that enables the control of the existing voltage change switch (43PDA) in the field and remotely, and adds a self-diagnosis function according to a digital microcontroller (MCU) to enable normal operation and digital input. The present invention relates to a digital controller for an automatic voltage transfer switch in which a contact and a digital output contact can be easily identified through an external lamp.

In general, the space inside the switchboard is small and it is easy to work while identifying the drawing and the actual terminal number when the wiring work is performed by workers due to the collection of many peripheral devices (terminal block, breaker, auxiliary relay, condenser or electric wire). Did not do it.

In recent years, as power supply and supply stabilization and load capacity have increased, a number of protection devices have been added, and the thickness of wires has increased due to power supply, and the number of wires has increased due to protection devices. It is a trend.

As a result, in case of substation switchgear with a large amount of wiring, a large number of incorrect wiring due to the operator's error has occurred, and therefore, the malfunction of equipment, accidents and loss of manpower and time are gradually increasing in the field.

As such, the labor costs were reduced by increasing the material and labor costs incurred due to incorrect wiring and by reducing the amount of wiring to reduce the test period.

In other words, in today's world where digital technology is widely used, many digital technologies are also applied to the power system field, so that many products such as digital protection system, electric power monitoring system and electronic electricity meter are installed and operated in the switchboard, but are shown in FIGS. 1A and 1B. Difficulties in digitizing with the knob-type switch located on the front of the switchboard.

As such, a PCB board is added as shown in FIG. 2 to control the existing voltage change switch.

However, by adding a PCB board, it was possible to simplify the connection, but only a part of the connection amount is reduced, simplifying the connection, there was a problem that the product material cost and product price increases.

On the other hand, the voltage switching switch is a switch for switching the voltage manually and automatically, and selects one of A-BUS, B-BUS or OFF of the PT secondary voltage of the substation double bus.

In this case, a complicated rear connection is required for the operation of the voltage switching switch, and the increase in the amount of connection leads to an increase in the risk of erroneous wiring, an increase in material costs due to an increase in wires and auxiliary relays, an increase in wiring check, and an increase in test time. Had too.

The purpose of the present invention is to solve the above problems, and by adding a self-diagnostic function using a digital microcontroller (Micro MCU) inside, it is easy to check whether the normal operation and digital input contact and digital output contact with an external lamp. It is in making it possible.

Another object of the present invention is to enable the control of the voltage switching switch (43PDA) in the field and remote.

Another object of the present invention is to simplify the integration and control of a plurality of connections arranged in the terminal block rear switch without malfunction.

A digital controller for an automatic voltage transfer switch according to the present invention for realizing such a technical idea, comprising: a digital input unit configured to operate a photocoupler inside the controller after receiving power power supplied from the outside; A self-diagnostic unit which lights a status display lamp by performing self-diagnosis so as to check an operation state of the controller; A sequence processor configured to operate the state display lamp and the digital output by being processed by an internal sequence when the photocoupler inside the controller operates using the input power received; A digital logic gate indicating an operating state of the controller according to a digital input and preventing external noise from flowing in; A digital output unit including 17 channels divided into local and remote; A test check unit for checking a state of the controller so as not to be affected by the on-site use conditions without generating a malfunction due to noise inflow or occurrence from the outside; And a remote control unit for controlling the operation of the controller by a user through a separate control device at a position spaced from the controller. It includes.

Preferably, the self-diagnosis unit 12 turns on the steady state lamp RUN when the controller operates normally, turns off the steady state lamp when the controller operates abnormally, and turns on the abnormal state lamp FAIL. It features.

In addition, the self-diagnosis unit 12 is characterized in that it comprises AUTO, MANUAL, A-BUS, B-BUS, OFF, 43CA ON / OFF or 43RC ON / OFF lamp according to the state of the digital input.

The digital logic gate 14 may be programmed through a timer function and a download port set as a dip switch using a software timer using a clock inside the digital MCU. A digital MCU 141 for executing an update of the; Characterized in that it comprises a.

These features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, the terminology or terminology used in the specification and claims is based on the principle that the inventor can properly define the concept of the terminology in order to best explain his or her devise in the best way possible. It should be interpreted as meanings and concepts corresponding to

First, in the present embodiment, it is preferable that the digital controller for automatic voltage transfer switch 43PDA is mounted on the switchboard part of the substation and operated by receiving + 5V and + 12V power from a separate power supply device.

Accordingly, the digital controller (hereinafter, referred to as a “controller”) 10 for the automatic voltage transfer switch 43PDA adds a self-diagnosis function as shown in FIGS. 3A and 3B, through the display lamp A. FIG. The operation state of the controller and the state according to the digital inputs and outputs can be checked, including a digital input unit 11, a self-diagnostic unit 12 including a state indicator lamp A, a sequence processor 13, And a digital logic gate 14, a digital output unit 15, a test verification unit 16, and a remote control unit 17.

First, the digital input unit 11 (DI; Digital Input) performs a function of operating a photo coupler inside the controller after receiving power power supplied from the outside.

At this time, the digital input unit 11 is set to receive a voltage of DC + 24V from the outside through 9 channels, but DC + 125V may be supplied depending on the situation when the device is operated.

On the other hand, in order to prevent malfunction of the digital input, it is designed not to operate below DC + 18V.

In other words, when the digital input unit receives a voltage of DC + 125V, the actual operating device receives a voltage of DC + 70V.

Next, the self-diagnosis unit 12 performs a function of turning on the status display lamp A by performing a self-diagnosis so that the user can easily check the operating state of the controller 10.

For reference, referring to FIG. 4, the status display lamp for the self-diagnosis function, when the controller 10 operates normally, the steady state lamp RUN is turned on to inform the operation state. On the other hand, when abnormal operation occurs due to a defect inside the system apparatus, the steady state lamp is turned off, and the abnormal state lamp FAIL is lit.

On the other hand, AUTO, MANUAL, A-BUS, B-BUS, OFF, 43CA ON / OFF and 43RC ON / OFF lamps light up according to the state of the digital input.

In this case, the present invention has been set to perform self-diagnosis using a total of 11 lamps, but the present invention is not limited thereto.

When the photocoupler inside the controller operates by using the input power received through the digital input unit 11, the sequence processor 13 is processed by an internal sequence, thereby displaying the status display lamp A and the digital output. To operate.

The digital logic gate 14 (AND, NOT, SR Flip-Flop) displays the operation state of the controller 10 according to the digital input and prevents the inflow of external noise. 141, Micro Control Unit).

Looking at the digital MCU 141 in detail, it updates the program through a timer function and a download port set as a dip switch.

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On the other hand, when the internal logic of the controller is changed, it is preferable to execute the update using the download port without modifying the wiring.

The digital output unit (15, DO; Digital Output) has 17 channels that can be divided into local (local) and remote (SCADA). The reason is the difference in the voltage used. Generally, DC + 125V is used in the field. DC + 24V is used.

For reference, in this embodiment, the output contact is composed of one contact channel c, one contact channel 15, and one contact channel b. The contacts operate according to the state of the digital input.

Here, the digital MCU 141 continuously checks the digital input value and operates the output contact according to the change of the input state.

In addition, the test checker 16 performs a function of checking the state of the controller 10 in order not to be affected by the use conditions of the site without a malfunction caused by the inflow or occurrence of noise from the outside. .

In addition, by using the test verification unit 16, there is also a test time to prevent the occurrence of the test in the field. In other words, the product is subjected to environmental tests in order not to be affected by the on-site use conditions, and the quality and reliability of the product can be improved so that it does not malfunction even if noise occurs in the field.

On the other hand, the remote controller 17 performs a function of controlling the operation of the controller 10 through a separate control device at a position spaced from the controller 10.

Hereinafter, referring to FIG. 5, a method of operating the controller 10 through the application software having the above-described configuration is as follows.

Receive a power and digital input value from the outside through the T1 terminal block, and outputs a digital output value according to the digital input value received through the T2 / T3 terminal block.

In addition, the external input and output parts have a sufficient insulation strength, and by using a varistor and a transient voltage suppression TVS diode, it is possible to prevent the external noise flow.

Then, the state of the controller can be checked using the 11 lamps located at the upper left. That is, in the above-described functions, all these functions are performed by the MCU ATMEGA128 located at the left center.

As described above and described with reference to a preferred embodiment for illustrating the technical idea of the present invention, the present invention is not limited to the configuration and operation as shown and described as described above, it is a deviation from the scope of the technical idea It will be understood by those skilled in the art that many modifications and variations can be made to the present invention without departing from the scope of the invention. Therefore, all such appropriate changes and modifications and equivalents should be considered to be within the scope of the present invention.

According to the present invention described above, by using a digital controller for automatic voltage transfer switch (43PDA), it is designed as a very small product to be mounted in a limited switchboard, confusion when wiring by distributing and concentrating digital input and output for the convenience of the operator The cost savings can be achieved by eliminating the problem, and improving the auxiliary relays and timers attached to the peripherals so that they can be processed by internal logic.

In addition, by attaching a status display lamp with a self-diagnosis function, there is an effect that the user can check the status of the digital controller for automatic voltage transfer switch.

In addition, the present invention essentially conducts environmental testing of the product so as not to be affected by the on-site use conditions, thereby improving the quality and reliability of the product by preventing malfunction even when noise occurs in the field. have.

Claims (6)

In the digital controller 10 for automatic voltage transfer switch, A digital input unit 11 for operating a photo coupler inside the controller after receiving power power supplied from the outside; A self-diagnostic part 12 which lights up the status display lamp A by performing self-diagnosis so as to check an operation state of the controller; A sequence processor (13) for operating the status display lamp and the digital output by being processed by an internal sequence when the photocoupler inside the controller operates using the received input power; A digital logic gate (14) for indicating an operation state of the controller according to a digital input and preventing the inflow of external noise; A digital output unit 15 including 17 channels divided into a local and a remote (SCADA); A test check unit 16 for checking a state of the controller so as not to be affected by the on-site use conditions without generating a malfunction due to noise inflow or occurrence from the outside; And A remote control unit 17 for controlling the operation of the controller through a separate control device by a user at a position separated from the controller; Digital controller for automatic voltage transfer switch comprising a. delete delete The method of claim 1, The self-diagnostic part 12, When the controller operates normally, the steady state lamp (RUN) is turned on, and if abnormally operated, the steady state lamp is turned off, and the abnormal state lamp (FAIL) is turned on. The method according to claim 1 or 4, The self-diagnostic part 12 is AUTO, MANUAL, A-BUS, B-BUS, OFF, 43CA ON / OFF or 43RC ON / OFF lamp according to the state of the digital input digital controller for automatic voltage transfer switch. The method of claim 1, The digital logic gate 14 is, A digital MCU 141 executing an update of a program through a timer function and a download port set as a dip switch using a software timer using a clock inside the digital MCU; Digital controller for automatic voltage transfer switch comprising a.

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