KR20130071746A - Status information displaying method and digital protective relay using the same - Google Patents

Abstract

PURPOSE: A method of indicating status information of a relay from which malfunction of the power state can be monitored, and problems can be intuitively known and a relay using the same are provided. CONSTITUTION: A method of indicating status information of a relay includes a step which stores a normal action range of a power Information value (S100); a step of measuring a current power value (S110); a step of comparing the measure power value with a stored normal range (S120); a step of determining whether the power value is within the normal range (S130); a step of continuously measuring a power value if the power value is within the normal range, or determining whether the power status is normal if otherwise (S140); a step of informing indicating that the power status is abnormal if it is determined as abnormal (S150). [Reference numerals] (AA) Start; (S100) Store a normal action range of a power Information value; (S110) Measure a power value; (S120) Compare a measured power value with a normal action range; (S130) Is a power value within a normal action range ?; (S140) Determine a power state; (S150) Display a power state

Description

Status information display method of relay and relay using same {STATUS INFORMATION DISPLAYING METHOD AND DIGITAL PROTECTIVE RELAY USING THE SAME}

The present invention relates to a state information display method of a relay and a relay using the same, and more particularly, a state information display method of a relay that allows a user to easily check the power information by displaying an abnormal occurrence of a power state and a relay using the same. It is about.

The digital relay is a relay that can be controlled to supply or cut off power to a load such as an electric motor, and can protect the load in the event of an accident current such as overcurrent or short circuit current in the load.

For the purpose of protecting the load equipment, the digital relay is controlled by a current sensor (SENSOR) that detects the current on the power supply circuit, and a circuit breaker that protects the load from the accident current by controlling the digital relay when the accident current occurs. It is connected and used.

A conventional digital relay calculates a value required for a power system using a digital signal converted by a measuring unit measuring a current value, and performs a set operation using the signal. In addition, digital output control is performed through a user input through an input device such as a keypad. In addition, it communicates with the external device through the communication unit, and performs tasks for various requests.

Since the conventional digital relay displays only the value itself when displaying the power information, in order to determine whether the displayed information is normal or abnormal, it is necessary to be familiar with the power information of the corresponding system. Although there is a function to save the maximum value and the minimum value in relation to the power information, the power information provided by the device is used for analysis after the occurrence of the accident rather than preventing the accident because the user needs to confirm the operation by the user. many.

In particular, such a conventional digital relay has a problem that it is not easy to identify the system in which the problem occurred in the site where the monitoring system is not built.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a method for displaying status information of a relay which can intuitively know whether an abnormal state of a power state occurs and a relay using the same.

According to an aspect of the present invention, there is provided a method of displaying state information of a relay, comprising: storing a normal range of power information values; Measuring a current power value and determining whether the measured power value is within the stored normal range; And displaying the current power state to the user when the measured power value does not exist within the stored normal range.

And receiving, from a user, whether to display the power state. The displaying may include displaying the power state only when there is an input of the user.

The method may further include setting a time for displaying the power state, wherein the displaying may include displaying the power state only at the set time.

The power information may be at least one of voltage, current, power, load factor, power factor, total voltage distortion (THD), and total current distortion (TDD).

The displaying may include updating and displaying the power state at predetermined time intervals.

On the other hand, the relay according to an embodiment of the present invention for achieving the above object, the storage unit for storing the normal range of the power information value; A measuring unit measuring a power value; A determination unit determining whether the measured power value is within the stored normal range; And a display unit which displays a current power state to a user when the measured power value does not exist within the stored normal range as a result of the determination of the determination unit.

And an input unit configured to receive an input from a user whether to display the power state. The display unit may display the power state only when the user inputs the input.

The storage unit may store a set time for displaying the power state, and the display unit may display the power state only at a set time stored in the storage unit.

The input unit may receive the setting time from a user.

The display unit may update and display the power state at predetermined time intervals.

The display unit may include any one of a liquid crystal display (LCD), a light emitting diode (LED), a 7-segment, and a speaker.

In addition, the method for displaying the state information of the relay according to another embodiment of the present invention for achieving the above object comprises the steps of measuring the power information for each predetermined period; Storing the measured power information; Determining whether a notification window display is set; Calculating whether the measured power information is included in a normal range when the notification window display is set; And generating the notification window when the measured power information does not exist in the normal range.

The calculating may include determining whether there is a predetermined measurement element, and then calculating whether the measured power information is included in a normal range only when the user does not confirm the predetermined measurement element.

The method may further include setting a time for displaying the notification window, wherein generating the notification window may generate the notification window only when the current time corresponds to the set time.

The notification window may display whether there is an abnormality in power information such as voltage, current, power, load factor, power factor, total sum distortion (THD), total demand distortion (TDD), and the like.

According to the method for displaying the state information of the relay and the relay using the same according to the above configuration, it is possible to intuitively know whether an abnormality in the power state occurs, so that the user can quickly cope with an accident.

1 is a flowchart illustrating a method of displaying status information of a relay according to an embodiment of the present invention;
2 is a block diagram showing a configuration of a relay according to an embodiment of the present invention;
3 to 5 are flowcharts illustrating a flow of a method for displaying status information of a relay according to another embodiment of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

1 is a flowchart illustrating a method of displaying status information of a relay according to an embodiment of the present invention.

First, the normal range of the power information value is stored (S100). The power information refers to voltage, current, power, load factor, power factor, total harmonic distortion (THD), total demand demand distortion (TDD), and the like. Range is the range of power that the device can operate normally.

Next, the current power value is measured (S110). Power value measurement can be implemented using power value measurement principles and apparatus that are already used in relays.

Thereafter, by comparing the measured power value with the stored normal range value (S120), it is determined whether the power value exists within the normal range (S130).

If the power value is within the normal range (S130-Yes), the power value is continuously measured (S110), and the measured power value is compared with the normal range (S120). On the contrary, if the power value is out of the normal range (S130-No), the power state is determined (S140). In this case, the power state is judged to be an abnormal state due to excessive or insufficient current power.

Finally, if it is determined that the determined power state, that is, the abnormal state (S150), the user can intuitively determine that the abnormal state. The power value is continuously measured again (S110).

Although not shown in FIG. 1, the method may further include receiving an input from the user whether to display the power state. In this case, when a signal indicating that the power state is not input from the user may not display the power state.

The method may further include setting a time for displaying the power state. In this case, the power state may not be displayed unless the time is set. In the displaying step, the power state is periodically recognized by updating and displaying the power state every predetermined time.

On the other hand, in relation to the display method, a notification window may be generated on the display to display the power state to the user. The display may be implemented as a liquid crystal display (LCD). It may also be implemented as a light emitting diode (LED), a 7-segment (segment).

In this way, the user can intuitively know whether there is an abnormality in the current system even when the base knowledge of the power information does not exist.

2 is a block diagram showing a configuration of a relay according to an embodiment of the present invention. As illustrated in FIG. 2, the relay 200 according to an embodiment of the present invention includes a measuring unit 210, an input unit 220, a determination unit 230, a storage unit 240, and a display unit 250.

The measuring unit 210 has a function of measuring a current power information value. That is, the state of voltage, current, power, load factor, power factor, total harmonic distortion (THD), and total demand demand distortion (TDD) is measured.

The input unit 220 may receive a control signal or a normal range value of the power value from the user. In addition, the input unit 220 may receive from the user whether to display the power state or the time to display the power state.

The determination unit 230 determines whether the current power value measured by the measurement unit 210 is in a normal state. This may be performed by reading a normal range of power values stored in the storage unit 240 to be described later, receiving a current power value from the measuring unit 210, and comparing the power values.

In addition, the determination unit 230 may receive a normal range value or a power state of the power value input from the input unit 220, or receive a time for displaying the power state, and store it in the storage unit 240 to be described later. .

The storage unit 240 stores the normal range value of the power value or the power state as described above, or stores the time to display the power state, and transfers the corresponding information when requested by the determination unit 230. Has the function.

The display unit 250 has a function of displaying the measured power value to the user when the measured power value does not exist within the stored normal range as a result of the determination by the determination unit 230. That is, a new notification window or the like is displayed to intuitively determine whether an abnormal state or a normal state is present. The display unit 250 may display the power state only when a user's command to display the power state is input from the input unit 220. In addition, the display unit 250 may display the power state only at a preset time stored in the storage unit 240. The display unit 250 may update and display the power state at predetermined time intervals. For example, by updating the power state in units of 1 minute, 10 minutes, 30 minutes, 1 hour, etc., it is possible to periodically check the change of the power state.

The display unit 250 may be implemented as a liquid crystal display (LCD), a light emitting diode (LED), a 7-segment, a speaker, or the like.

3 to 5 are flowcharts illustrating a flow of a method for displaying status information of a relay according to another embodiment of the present invention.

First, the power information is measured (S300), and stored in the storage unit (S310). The power information means power information such as voltage, current, power, load factor, power factor, total voltage distortion (THD), and total current distortion (TDD). For example, power information can be measured every 500ms. Alternatively, the power information may be measured at a long or short period.

Then it is determined whether the notification window is running (S320). Here, the notification window is for displaying the status of the current measurement data, and means that the notification window is set to display the current status of the measurement data to the user.

If the notification window is not running (S320-No) continues to measure the power information periodically (S300). If the notification window is running (S320-Yes), it is determined whether there is a measurement element that is set to generate the notification window (S330). That is, it is determined whether power information such as voltage, current, power, load factor, power factor, total voltage distortion (THD), and current total demand distortion (TDD) is selected. If it is selected, the user checks whether the element has already been checked (S340). If the user has already confirmed the element (S340-Yes), and returns to the beginning again to perform the power information measurement (S300).

4 illustrates step S340 in more detail.

That is, there is a touch area called 'confirmation' of the notification window, and when the user touches it (S400-Yes), the user determines that the element is confirmed. Therefore, a message for terminating the notification window is generated (S410). If not, the corresponding step is terminated, and step S350 is performed. In FIG. 4, it is assumed that a touch area exists, but alternatively, a user may receive a confirmation message from a user through an input unit such as a button or a keypad. This may be implemented in any way.

Returning to FIG. 3 again, if it is not an element that the user has confirmed (S340-No), it is determined whether the current time corresponds to the time set for generating the notification window (S350). If it does not correspond to the set time (S350-No), since there is no need to generate a notification window, the power information is continuously measured (S300). If the current time corresponds to the set time (S350-Yes), it is determined whether the measured information value is included in the normal range (S360), and if it is the normal range (S360-Yes), there is no problem in the system and the power information is continuously maintained. It measures (S300). However, if it does not fall within the normal range (S360-No), it generates a message for generating a notification window (S370), and indicates that the abnormal situation through the provided display unit.

5 shows the details after step S360. That is, if the current time is included in the set time for generating the notification window (S500-Yes), check whether the set measurement value is included in the normal range (S510), if the normal range generates a message that the notification window ends (S530). Return to the first step again, if the abnormal range is updated to the notification window displaying the measurement value to the notification window to display the abnormal situation (S520). And back to the beginning to measure the power information (S300).

According to the above method, it is possible to intuitively know whether or not an abnormality in the power state occurs, so that the user can quickly cope with an accident.

In the foregoing description, each component and / or function described in various embodiments may be implemented in combination with each other, and those skilled in the art may recognize the present invention described in the claims below. It will be understood that various modifications and variations can be made in the present invention without departing from the spirit and scope.

200 ......................................
210 ...
220 ...
230 .................. part
240 ................................................... Save part
250 .................................

Claims (15)

Storing a normal range of power information values;
Measuring a current power value and determining whether the measured power value is within the stored normal range; And
And displaying the current power state to the user when the measured power value does not exist within the stored normal range. The method of claim 1,
Receiving an input from a user whether to display the power state;
The displaying may include displaying the power state only when there is an input of the user. The method of claim 1,
Setting a time for displaying the power state;
The displaying may include displaying the power state only at the predetermined time. The method of claim 1,
The power information is a state information display of the relay, characterized in that at least one of voltage, current, power, load factor (Power Factor), power factor, total voltage distortion (THD), current total demand distortion (TDD) Way. The method of claim 1,
The displaying may include updating and displaying the power state at predetermined time intervals. A storage unit for storing a normal range of power information values;
A measuring unit measuring a power value;
A determination unit determining whether the measured power value is within the stored normal range; And
And a display unit for displaying a current power state to a user when the measured power value does not exist within the stored normal range as a result of the determination of the determination unit. The method according to claim 6,
And an input unit configured to receive an input from a user whether to display the power state.
The display unit includes:
And displaying the power state only when there is an input of the user. The method according to claim 6,
The storage unit stores a set time for displaying the power state,
And the display unit displays the power state only at a preset time stored in the storage unit. The method of claim 8,
The input unit, the relay, characterized in that for receiving the setting time from the user. The method according to claim 6,
And the display unit updates and displays the power state at predetermined time intervals. The method according to claim 6,
The display unit includes:
Relay comprising a liquid crystal display (LCD), a light emitting diode (LED), a 7-segment, a speaker. Measuring power information at predetermined intervals;
Storing the measured power information;
Determining whether a notification window display is set;
Calculating whether the measured power information is included in a normal range when the notification window display is set; And
And generating the notification window when the measured power information does not exist in the normal range. 13. The method of claim 12,
Wherein the calculating step comprises:
And determining whether there is a preset measurement element, and calculating whether the measured power information is included in a normal range only when the user does not confirm the preset measurement element. . 13. The method of claim 12,
Setting a time for displaying the notification window;
Generating the notification window,
And displaying the notification window only when a current time corresponds to the set time. 13. The method of claim 12,
The notification window displays whether or not the power information such as voltage, current, power, load factor, power factor, total voltage distortion (THD), current total demand distortion (TDD), or the like is abnormal. How to display status information of relay.

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