KR20050073810A - Power quality sensor and power quality counter using power quality sensor - Google Patents

Abstract

The present invention provides an electrical quality sensor comprising: a measuring unit for measuring a difference between an input voltage and a preset reference voltage; a monitoring reference setting unit for setting a monitoring reference value for determining a range of abnormal operation; And a relay unit for outputting a preset output signal and a relay unit for generating a contact output corresponding to the output signal of the comparator when the input measurement signal deviates from the surveillance criterion set by the monitoring criterion selector.

Description

Electric quality sensor and electric quality counter using same {Power Quality Sensor And Power Quality Counter Using Power Quality Sensor}

The present invention relates to an electrical quality sensor for measuring the quality of electricity and an electrical quality counter using the same, and more particularly, to an electrical quality sensor capable of indicating the quality of electricity as a relay contact output and counting the number of abnormal operations. Electrical quality counter.

Recently, with the development of information, communication industry and other power consumption, the demand for new quality of electric quality such as overvoltage, instantaneous high voltage, momentary low voltage, instantaneous power failure is increasing rapidly.

An electrical quality meter presented to measure this new concept of electrical quality is shown in FIG. 1. 1 is a schematic block diagram of a conventional electrical quality measurement apparatus.

Referring to FIG. 1, when the electric signal input from the measurement unit 100 is measured, and the user specifies the measurement range for voltage, current, power amount, power factor, harmonics, etc. through the measurement range designation unit 150, the controller 130 ) Processes the measured value internally and stores it in the memory 110. The measured result is displayed on the display unit 120 as a scale display or a graph, or is transmitted remotely through the communication circuit 140.

These instruments allow users to measure electrical quality and view the output of various data and graphs.

However, such a conventional electrical quality measuring instrument includes a memory and a display part, and thus there is a problem in that the configuration is complicated and the cost is high.

In addition, in order to analyze the measurement reference value and the measurement result value requires expertise in the power system has a problem that is difficult for non-experts to use.

In addition, when the measured results and graphs are to be transmitted through a communication network, there is a problem that a large amount of data transmission may cause excessive data traffic and additional costs such as a communication device installation cost.

Therefore, there is a growing demand for an electrical quality measuring instrument that overcomes the unreasonable point of the conventional electrical quality measuring instrument and makes it possible to easily understand the presence and the contents of the abnormal operation even by a non-expert.

Therefore, the present invention has been made to solve the above problems, the first object of the present invention is not provided with a memory and the display portion of the electrical quality sensor that can simplify the configuration and reduce the cost and electricity using the same To provide a quality counter.

A second object of the present invention is to provide an electrical quality sensor and an electrical quality counter using the same, which are easy to analyze results by outputting the measurement result to the ON-OFF relay contact.

The third object of the present invention is to provide an alarm lamp, an alarm buzzer, a counter, etc. in the ON-OFF terminal of the relay unit, so that when the instantaneous voltage is out of the monitoring standard, the contents and the number of occurrences of the electric quality sensor can be easily grasped and the same To provide an electrical quality counter.

A fourth object of the present invention is to provide an electric quality sensor that does not cause an overload of network traffic when the ON-OFF contact output is connected to a remote control monitoring system or a remote terminal device by using a separate communication dedicated line or when connected to an Internet network. To provide an electrical quality counter.

According to a first aspect of the present invention for achieving the above object, in the electrical quality sensor, a measuring unit for measuring the difference between the voltage of the input electrical signal and the predetermined reference voltage, for determining the range of abnormal operation A monitoring reference setting unit for setting a monitoring reference value, a comparator for outputting a preset output signal when the measurement signal input from the measuring unit deviates from the monitoring standard set by the monitoring reference selecting unit, and a contact point corresponding to the output signal of the comparing unit An electrical quality sensor can be provided comprising a relay unit for generating an output.

According to a second aspect of the present invention for achieving the above object, in the electrical quality counter combined with a computer, a predetermined contact point when the voltage of the input electrical signal is outside the monitoring reference value for determining the range of abnormal operation At least one electrical quality sensor for generating an output, and when the contact output corresponding to the abnormal operation is input from the electrical quality sensor, the contact output information is transmitted to the computer, and count information corresponding to the number of occurrences of the abnormal operation from the computer. An electrical quality counter may include a signal converting unit for receiving a counting unit for receiving the count information from the signal converting unit and displaying the count information.

According to a third aspect of the present invention for achieving the above object, in the method for monitoring the electrical quality in the user server coupled via the electrical quality counter and the communication network, the event data corresponding to the abnormal operation from the electrical quality counter Receiving, analyzing the received event data to extract event-related information, recording the extracted event-related information, extracting a counter message for increasing the event occurrence count of the electrical quality counter And transmitting the extracted counter message to the electrical quality counter.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention;

2 is a block diagram showing the configuration of an electrical quality sensor according to the present invention. As shown in FIG. 2, the electrical quality sensor according to the present invention includes a measurement unit 10, a comparison unit 20, a monitoring standard selection unit 30, and a relay unit 40.

The measurement unit 10 measures the difference between the voltage of the input electrical signal and a predetermined reference voltage. When one of the voltage of 100V, 110V, 120V, 200V, 208V, 220V, 230V, 240V is selected, Measure the increase or decrease.

The monitoring reference setting unit 30 sets a monitoring reference value for determining a range of abnormal operation. The user selects the monitoring reference value using a selection switch, which will be described in detail with reference to FIG. 3.

The comparison unit 20 outputs a preset output signal to the relay unit 40 when the measurement signal input from the measurement unit 10 deviates from the monitoring standard set by the monitoring standard selection unit 30.

The relay unit 40 generates a contact output corresponding to the output signal of the comparator 20, and continuously turns off three normally ON contacts for 3 seconds according to the corresponding mode according to the output signal of the comparator 20. . As a result, the shaking of the relay due to the instantaneous voltage change can be prevented.

3 is a view for explaining the configuration and operation of the comparison unit 30 of FIG.

As shown in FIG. 3, the comparison unit 30 compares the signal received from the measurement unit 10 with the monitoring criteria set by the monitoring standard setting unit 30 among 16 monitoring standards. 4 includes the comparison unit 21, 23, 25, 27.

The first comparator 21 is used to detect whether an overvoltage is generated. When the input signal measured by the measuring unit 10 is 450 Vpk or more, the first comparator 21 determines that an overvoltage has occurred and outputs a preset output signal to the relay unit 40. Outputs to the first relay unit 41.

The second comparator 23 is for detecting whether the instantaneous high voltage (swell) occurs, when the input signal measured by the measurement unit 10 exceeds 115% of the voltage value selected by the measurement unit 10 or more or When the measured input signal exceeds 106% of the voltage value selected by the measurement unit 10 for 200 ms or more, it is determined that an instantaneous high voltage has occurred and outputs a preset output signal to the first relay unit 41 of the relay unit 40. . Alternatively, according to another embodiment of the present invention, if the input signal measured by the measuring unit 10 is more than 110% of the voltage value selected by the measuring unit 10 for a simple comparison, it is determined that the instantaneous high voltage has occurred. You can also do that.

The third comparator 25 is used to detect whether an instantaneous low voltage is generated, and when the input signal measured by the measuring unit 10 is equal to or less than 90% of the voltage value selected by the measuring unit 10 for 30 ms or more. It is determined that the low voltage has occurred, and outputs a predetermined output signal to the second relay unit 43 of the relay unit 40. Alternatively, according to another embodiment of the present invention, when the input signal measured by the measurement unit 10 is 90% or less of the voltage value selected by the measurement unit 10 regardless of the generation time for a simple comparison, it is determined that the instantaneous low voltage has occurred. You can also do that.

The fourth comparator 27 is for detecting whether a major sag occurs, and when the input signal measured by the measuring unit 10 is 2s or more and 87% or less, 300 ms or more and 80% or less, 100 ms or more. In the case of 60% or less and 30 ms or more and 30% or less, it is determined that a momentary power failure has occurred and outputs a preset output signal to the third relay unit 45 of the relay unit 40. Alternatively, according to another embodiment of the present invention, if the input signal measured by the measuring unit 10 is 50% or less of the voltage value selected by the measuring unit 10 for a simple comparison, it is determined that a momentary power failure has occurred. You can also do that.

The above 16 monitoring criteria are shown in the table as follows.

TABLE 1

4 is a block diagram showing the configuration of an electrical quality counter according to the present invention.

As shown in FIG. 4, the electrical quality counter includes an electrical quality sensor 50, a signal conversion unit 70, a counter unit 75, a state maintaining circuit unit 80, a reset unit 95, and a lamp unit 85. And a buzzer 90.

The electrical quality sensor 50 is the electrical quality sensor described in Figs. 2 and 3, and the relay contact converts the signal from ON to OFF when the monitored power is out of the monitoring reference value. Only one electrical quality sensor 50 is required in the case of a home using a single phase, but in the case of a factory using three phases, three are required to detect abnormal operation of each phase.

When the contact output corresponding to the abnormal operation is input from the electrical quality sensor 50, the signal converter 70 transmits the contact output information to the user server 60, and corresponds to the number of occurrences of the abnormal operation from the user server 60. Receive count information.

The counter unit 75 receives the count information transmitted from the user server 60 from the signal conversion unit 70 and displays it. Here, the count information indicates the number of times the abnormal operation occurred. Thus, the electrical quality counter has three counter parts 75 for indicating the number of occurrences of overvoltage and instantaneous high voltage, instantaneous low voltage and instantaneous power failure.

The state maintaining circuit unit 80 is a circuit that continuously maintains a state in which the lamp unit 85 is turned on unless a user presses the reset unit 95 when an abnormal operation occurs.

The buzzer 90 sounds a buzzer when an abnormal operation occurs.

5 is a flowchart illustrating a process of performing an electric quality monitoring program between an electric quality counter and a user server.

Referring to FIG. 5, first, the electrical quality sensor 50 of the electrical quality counter detects an event, that is, occurrence of an abnormal operation (S510).

When an event occurrence is detected, the signal conversion unit 70 in the electrical quality counter receives the event occurrence signal from the electrical quality sensor 50, and then transmits the event data to the user server 60 through a communication network such as a wireless LAN. .

When the user server 60 receives the event data, the server 60 determines whether the received event data is a test signal, and if the test signal is not the test signal, recognizes that the actual abnormal operation has occurred, records the event data, and displays the actual event on the screen ( S530). At this time, the user server 60 extracts, records, and displays the information such as the type of event, the time of occurrence, the device name, the monitoring phase from the event data on the screen.

If the received event data is a test signal, the user server 60 records the test event and displays it as "TEST" on the screen (S540).

When the event data is recorded, the user server 60 extracts a counter message (S550) and transmits it to the electrical quality counter (S560).

Upon receiving the counter message, the electrical quality counter increments the count of the counting unit 75 corresponding to the generated event, and the lamp unit 85 and the buzzer 90 are driven.

6 is a notification screen of occurrence of an event of the user server 60.

When the user detects the occurrence of an event in the electrical quality counter while using the user server 60 and transmits the event data to the user server 60, a warning window is displayed to inform the occurrence of the event as shown in FIG.

7 is a screen in which a program for monitoring event occurrence is performed in a user server. In FIG. 6, when the user clicks OK with the mouse, the screen of FIG. 7 is displayed.

As shown in FIG. 7, the event occurrence window includes information on the event, that is, information on the type of abnormal operation, time of occurrence, generation device, phase information, location of occurrence, and whether the event is a real event or a test event. Is displayed.

8 is a screen displayed on the user server when the event device information menu is selected.

FIG. 8 shows a device information viewing window as shown in FIG. 8 when selecting device information confirmation from the menu of the screen shown in FIG. The device information view window displays device information such as device name, model name, IP address information, monitoring information, and electrical information of the device where the event occurred.

According to the present invention as described above, since the electrical quality sensor does not have a memory and a display portion, the configuration is simple and the cost can be reduced.

In addition, the measurement results are output to the ON-OFF relay contact, making it easy to analyze the results.

In addition, by providing an alarm lamp, alarm buzzer, counter, etc. in the ON-OFF terminal of the relay unit, even if the non-expert voltage is out of the monitoring standard, even the non-expert can easily grasp the contents and the number of occurrences.

In addition, when the ON-OFF contact output is connected to a remote control monitoring system or a remote terminal device, it does not cause an overload of network traffic when using a separate communication dedicated line or connecting to an Internet network.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it is possible to make various modifications or variations without departing from the spirit and scope of the invention. Accordingly, the appended claims will cover such modifications and variations as fall within the spirit of the invention.

1 is a schematic block diagram of a conventional electrical quality measurement apparatus.

2 is a block diagram showing the configuration of an electrical quality sensor according to the present invention.

3 is a view for explaining the configuration and operation of the comparison unit of FIG.

4 is a block diagram showing the configuration of an electrical quality counter according to the present invention.

5 is a flowchart illustrating a process of performing an electric quality monitoring program between an electric quality counter and a user server.

6 is a notification screen of occurrence of an event of a user server.

7 is a screen in which a program for monitoring event occurrence is performed in a user server.

8 is a screen displayed on the user server when the event device information menu is selected.

<Short description of the major reference symbols>

10: measuring unit, 20: comparing unit,

30: monitoring standard setting unit, 40: relay unit,

50: electrical quality sensor, 60: user server,

70: signal converting unit, 75: counting unit,

80: state holding circuit, 85: lamp unit,

90: buzzer, 95: reset part.

Claims (16)

Electrical quality sensor, A measuring unit measuring a difference between a voltage of an input electrical signal and a predetermined reference voltage; A monitoring reference setting unit for setting a monitoring reference value for determining a range of abnormal operation; A comparator for outputting a preset output signal when the measurement signal input from the measuring unit deviates from the monitoring criterion set by the monitoring criterion selecting unit; And And a relay unit generating a contact output corresponding to the output signal of the comparator. The method of claim 1, The comparison unit A first comparing unit which determines whether the measurement signal input from the measuring unit is an overvoltage; A second comparing unit to determine whether the measurement signal is an instantaneous high voltage; A third comparison unit determining whether the measurement signal is an instantaneous low voltage; And And a fourth comparator configured to determine whether the measurement signal is a momentary power failure. The method of claim 2, And the monitoring reference value corresponding to the overvoltage is 450V. The method of claim 2, The monitoring reference value corresponding to the instantaneous high voltage is 110% or more of the reference voltage. The method of claim 2, The monitoring reference value corresponding to the instantaneous low voltage is 90% or less of the reference voltage. The method of claim 2, The monitoring reference value corresponding to the instantaneous power failure is 50% or less of the reference voltage. The method of claim 1, And the contact output is in an OFF state for a predetermined time from the ON state of the contact. The method of claim 1, The relay unit A first contact portion generating contact outputs corresponding to overvoltage and instantaneous high voltage; A second contact portion generating a contact output corresponding to an instantaneous low voltage; And And a third contact portion for generating a contact output corresponding to a momentary power failure. An electrical quality counter coupled with a computer, At least one electrical quality sensor for generating a predetermined contact output when a voltage of an input electrical signal is out of a monitoring reference value for determining a range of abnormal operation; A signal converter which transmits the contact output information to the computer when the contact output corresponding to the abnormal operation is input from the electrical quality sensor, and receives count information corresponding to the number of occurrences of the abnormal operation from the computer; And And a counting unit which receives the count information from the signal converting unit and displays the count information. The method of claim 9, The electrical quality sensor is A measuring unit measuring a difference between a voltage of an input electrical signal and a predetermined reference voltage; A monitoring reference setting unit for setting a monitoring reference value for determining a range of abnormal operation; A comparator for outputting a preset output signal when the measurement signal input from the measuring unit deviates from the monitoring criterion set by the monitoring criterion selecting unit; And And a relay unit generating a contact output corresponding to the output signal of the comparison unit. The method of claim 10, The comparison unit A first comparing unit which determines whether the measurement signal input from the measuring unit is an overvoltage; A second comparing unit to determine whether the measurement signal is an instantaneous high voltage; A third comparison unit determining whether the measurement signal is an instantaneous low voltage; And And a fourth comparator for determining whether the measurement signal is a momentary power failure. The method of claim 10, The monitoring reference value corresponding to the overvoltage is 450V, The monitoring reference value corresponding to the instantaneous high voltage is 110% or more of the reference voltage, The monitoring reference value corresponding to the instantaneous low voltage is not more than 90% of the reference voltage, An electric quality counter characterized in that the monitoring reference value corresponding to the instantaneous power failure is not more than 50% of the reference voltage. The method of claim 9, The count output unit A first count output unit configured to output the number of occurrences of the overvoltage and the instantaneous high voltage; A second count output unit for outputting the number of occurrences of the instantaneous low voltage; And And a third count output unit for outputting the number of occurrences of the instantaneous power failure. The method of claim 9, A buzzer which generates a warning sound when the relay unit generates a contact output corresponding to an abnormal operation; A lamp unit generating light for warning when the relay unit generates a contact output corresponding to an abnormal operation; A state maintaining circuit unit configured to maintain the light emitting state of the lamp unit emitted by the contact output corresponding to the abnormal operation; And And a test unit configured to input an electric signal corresponding to an abnormal operation to check whether the electric quality sensor and the count unit operate normally. In the method of monitoring the electrical quality in the user server coupled via the electrical quality counter and the communication network, Receiving event data corresponding to an abnormal operation from the electrical quality counter; Extracting event related information by analyzing the received event data; Recording the extracted event related information; Extracting a counter message for increasing an event occurrence count of the electrical quality counter; And And transmitting the extracted counter message to the electrical quality counter. The method of claim 15, The event related information is An electrical quality monitoring method comprising at least one of an event type, an occurrence time, an occurrence device, an occurrence place, a test event presence, and monitoring phase information.