KR100637805B1 - Power status analyzer - Google Patents

Abstract

A power state analysis terminal is provided to manage various information, such as voltage and current waveforms, demand commands, harmonics, and vector diagrams via wireless communication. A mode selector selects an operation mode from a power state measurement mode and a diagnosis mode. A memory(107) stores data transmitted from a digital powermeter. An IR(InfraRed) transmitter(111) and an IR receiver(112) communicate with the digital powermeter by using an IR ray. An IR communicator(110) is connected to the IR transmitter and the IR receiver and performs short-range communication. A controller(105) controls the short-range communication between the digital powermeter and the transmitter/receiver, stores power measurement data in the memory, and displays an analyzed result. A voltage analyzer analyzes a voltage received from the IR communicator. A current analyzer analyzes a current received from the IR communicator. A power analyzer analyzes power received from the IR communicator. A power state analysis terminal includes a power factor calculator, a diagnosing operation, and a display(108).

Description

Power Status Analysis Terminal {POWER STATUS ANALYZER}

1 is a perspective view showing the overall configuration of the present invention.

Figure 2 is a block diagram showing an embodiment configuration of the digital power meter of Figure 1;

3 is a block diagram showing an embodiment configuration of the power state analysis terminal of FIG.

Figure 4 is an exemplary menu for power state analysis in the present invention.

5 is a basic measurement screen example in the present invention.

Figure 6a and Figure 6b is an exemplary view of the analysis screen when measuring voltage in the present invention.

7a to 7d is a diagram illustrating an analysis screen at diagnosis in the present invention.

8A and 8B illustrate screens when demanded in the present invention.

<Explanation of symbols for the main parts of the drawings>

100... Digital power meter

105... Control

109... Wired communication unit

110... Infrared communication unit

200... Power Status Analysis Terminal

201... Mode setting part

204... Control

205... Infrared communication unit

212... Diagnostic department

The present invention relates to a power state analysis terminal, and more particularly, to a power state analysis terminal for wirelessly checking various information such as voltage / current real-time waveform, demand trend, harmonic analysis, vector diagram, etc. in the field in real time. will be.

In general, the power meter is installed in each customer to display the power consumption by analog method, and in recent years has been able to measure and display the usage by the digital method.

In general, the digital power meter is formed as a standalone, and mainly performs only basic measurement functions for real-time measurement of voltage, current, power, frequency, power factor, and peak.

In order to identify and analyze the measurement status of the digital power meter, conventionally, a personal computer (PC) connects the communication line with the digital power meter and then communicates with a separate program to determine and analyze the measurement status of the digital power meter on the PC. It was.

Therefore, in order to analyze the power state of the digital power meter using a PC as in the prior art, there is an inconvenience of moving the inferior PC to the position of the digital power meter or moving the digital power meter to the place where the PC is located.

In addition, there was also the inconvenience of connecting the digital power meter with a separate communication line, there was also a disadvantage such as the need for a separate communication program for communication.

Accordingly, the present invention is proposed to solve the conventional problems as described above,

The purpose is to provide a power state analysis terminal that enables wireless real-time verification of various information such as voltage / current real-time waveforms, demand trends, harmonic analysis, and vector diagrams in the field.

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"Power state analysis terminal" according to the present invention for achieving the above object,

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Measures the voltage / current / power / power of the power line, converts it into an infrared signal, performs a near field wireless communication using a digital power meter and a near field wireless communication using infrared rays, and measures the power transmitted from the digital power meter to infrared rays. After receiving and analyzing the data, it displays the voltage / current as a real-time waveform, and includes a power state analysis terminal that displays various information that cannot be displayed directly on the power meter such as power quality and vector diagram on the screen. do.

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In the above, the power state analysis terminal,

A mode setting unit for setting a mode for power state measurement and diagnosis;

A memory for storing data transmitted from the digital power meter;

An infrared transmitter / receiver for transmitting and receiving data with the digital power meter in infrared;

An infrared communication unit connected to the infrared transmitter / receiver to perform short range wireless communication;

A control unit controlling overall operation of the power state analysis terminal, controlling short-range wireless communication with the digital power meter through the infrared communication unit, storing received power measurement data in a memory, and controlling display of an analysis result; ;

A voltage analyzer for analyzing a state of the voltage received through the infrared communication unit;

A current analyzer for analyzing a state of the current received through the infrared communication unit;

A power analyzer for analyzing power received through the infrared communication unit;

A power factor calculator configured to calculate a power factor using the voltage / current received through the infrared communication unit;

A diagnostic unit for performing a diagnosis of a power state under the control of the controller;

And an indicator for displaying the analyzed voltage / current / power / power factor and a diagnosis result on the screen.

The mode setting unit may include a voltage / current / power measurement mode, a diagnostic mode for vector / wave / harmonic diagnosis, a demand mode, and a menu setting mode for menu setting.

Hereinafter, described in detail with reference to the accompanying drawings a preferred embodiment of the present invention. If it is determined that the detailed description of the known function or configuration related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

1 is a perspective view showing the overall configuration of the present invention, reference numeral 100 denotes a digital power meter installed in the field to measure power, reference numeral 111 denotes an infrared transmitter for infrared communication, and reference numeral 112 denotes an infrared receiver. Reference numeral 200 denotes a power state analysis terminal for performing measurement of short-range wireless communication with the digital power meter 100, receiving the measured data, and analyzing and displaying the measured data on the screen.

2 is a block diagram illustrating an embodiment of the digital power meter 100.

Here, reference numerals 101 and 102 denote voltage / current measuring units for measuring voltage / current of a power line to be measured, and reference numerals 103 and 104 denote power / power measuring units for measuring power and amount of power of the power line, and reference numeral 106 Denotes a key operation unit for inputting a function of a user.

In addition, reference numeral 105 measures the voltage / current / power / power amount through the voltage / current measuring unit 101 and 102 and the power / power amount measuring unit 103 and 104 according to the key operation state of the key operation unit 106. And a control unit for measuring, controlling the display of the measurement and the measurement result, and controlling short-range wireless communication using wired communication and infrared light.

Further, reference numeral 107 denotes a memory for storing the measured voltage / current and measured power / power amount, and reference numeral 108 denotes an indicator for displaying the measured voltage / current and measured power / power amount as a digital value. Reference numeral 109 denotes a wired communication unit for performing communication in a RS-485 communication manner with a PC connected by wire under the control of the controller 105.

In addition, under reference to 110, data 110 for transmitting data stored in the memory 107 as an infrared signal for short-range wireless communication and data conversion for recognizing received infrared data are performed under the control of the controller 105. An infrared communication unit denotes an infrared transmitter for converting the transmission data transmitted from the infrared communication unit 110 into an infrared signal and transmits the infrared signal, and reference numeral 112 receives an infrared signal transmitted from the outside. 110 indicates an infrared receiver for delivery.

The digital power meter according to the present invention configured as described above is controlled by the controller 105 in the voltage measuring unit 101, the current measuring unit 102, the power measuring unit 103, and the power amount measuring unit 104, respectively. The voltage, current, power, and amount of power are measured and measured, and the measured and measured information is stored in the memory 107 and displayed on the display 108 as a digital value.

In this case, when the user selects an item (eg, voltage, current, etc.) that the user wants to measure through the key manipulation unit 106, the indicator 108 selectively displays the measurement state corresponding to the selected item.

On the other hand, if you want to analyze the measurement data of the digital power meter using a PC and a communication line as in the prior art, the communication line is connected to the PC and the wired communication unit 109, and performs communication using a signal processing method of the RS-485 method The PC receives the data measured by the digital power meter, analyzes it and displays it on the screen. However, this method has caused various problems.

Therefore, the present invention uses a near field communication (IrDA) method using infrared rays to solve the above conventional problems.

That is, in this method, when the measurement data is requested through the infrared communication using the power state analysis terminal 200 at a distance (near distance) from the digital power meter 100 installed in the field, the infrared receiver 112 receives the measurement data. In addition, the infrared communication unit 110 converts the data into general data and transmits the converted data to the control unit 105. The controller 105 analyzes the received data to be delivered and, if a request for measurement data, extracts the measurement data for each item stored in the memory 107 and transmits the measured data to the infrared communication unit 110. The infrared communication unit 110 converts the transmitted data into a data format for infrared communication, and the infrared transmitter 111 converts the converted transmission data (measurement data) into an infrared signal and transmits it, thereby providing power at a short distance. The state analysis terminal 200 receives it.

The power state analysis terminal 200 receiving the data measured by the digital power meter 100 using the short range wireless communication method analyzes the received data and displays it on the screen.

3 is a block diagram showing an embodiment of a power state analysis terminal 200 using a digital power meter.

Here, reference numeral 201 denotes a mode setting unit for setting a mode for power state measurement and diagnosis, and reference numeral 202 denotes a memory for storing data transmitted in the infrared from the digital power meter 100, and reference numerals 206 and 207. Denotes an infrared transmitter / receiver for transmitting and receiving data with the digital power meter 100 in infrared, and reference numeral 205 denotes an infrared communication unit connected to the infrared transmitter / receiver 206 and 207 to perform short-range wireless communication. Indicates.

In addition, reference numeral 204 controls the overall operation of the power state analysis terminal 200, and controls the short-range wireless communication with the digital power meter 100 through the infrared communication unit 205, and receives the received power measurement data The control unit stores the memory 202 and controls the display of the analysis results.

Also, reference numeral 208 denotes a voltage analyzer for analyzing the state of the voltage received through the infrared communication unit 205, and reference numeral 209 denotes a current analyzer for analyzing the state of the current received through the infrared communication unit 205. Reference numeral 210 denotes a power analyzer for analyzing power received through the infrared communication unit 205, and reference numeral 211 denotes a power factor for calculating a power factor using the voltage / current received through the infrared communication unit 205. Reference numeral 212 denotes a calculation unit for performing diagnosis of a power state under the control of the control unit 204, and reference numeral 203 denotes an indicator for displaying the analyzed voltage / current / power / power factor and a diagnosis result on a screen. Indicates.

The operation of the power state analysis terminal according to the present invention configured as described above will be described in detail with reference to FIGS. 4 to 8 as follows.

When the manager or inspector wants to analyze the power measurement state of the digital power meter 100 through the portable power state analysis terminal 200, in a state close to a distance capable of short-range wireless communication with the digital power meter 100 installed in the field. The mode setting unit 201 makes a data request for measurement data transmission.

When the request is input, the control unit 204 controls the transmission of the request data through the infrared communication unit 205, the infrared communication unit 205 converts the data for the request of the measurement data into the infrared data format to the infrared transmitter ( 206). The infrared transmitter 206 converts the data requesting the measurement data into an infrared signal and transmits the data.

The digital power meter 100 receiving the data requesting the measurement data transmitted in the infrared from the power state analysis terminal 200 converts the measurement data stored in the memory 107 into an infrared signal and transmits the power state. The infrared receiver 207 of the analysis terminal 200 receives it and transmits it to the infrared communication unit 205. The infrared communication unit 205 converts the received infrared data into a general data format and transmits it to the control unit 204.

The controller 204 stores the received data in the memory 202 and analyzes and displays the power state corresponding to the mode set by the manager (or the inspector) through the mode setting unit 201.

That is, when the administrator selects a menu through the mode setting unit 201, a menu for power state analysis as shown in FIG. 4 is displayed on the indicator 203 under the control of the controller 204.

When the administrator operates the measurement mode in this state, the basic measurement screen as shown in FIG. 5 is displayed on the indicator 203. Basic measurements here display line voltage, current, power, power factor, power, frequency, etc. In particular, the line voltage V is analyzed by the voltage analyzer 208, the current A is analyzed by the current analyzer 209, and the power kW is determined by the power analyzer 210. By analysis, the power factor (%) is displayed on the indicator 203 by calculation by the power factor calculator 211, respectively.

When the voltage mode is selected in the displayed state as shown in FIG. 5, the voltage analyzer 208 operates under the control of the controller 204 to analyze voltage data received from the digital power meter 100 using a PDA program. The result is displayed on the screen as shown in FIGS. 6A and 6B. For example, in FIG. 6A, each power line voltage (A, B, C) is displayed in the form of a graph. When the line voltage item is selected again, the minimum and maximum voltages between power lines are displayed as shown in FIG. When selected, displays the minimum and maximum phase voltages between the power lines. Therefore, the manager can easily recognize the line voltage state and the phase voltage state of the power line.

Next, when the diagnostic mode is selected from the basic menu as shown in FIG. 4, the diagnostic menu as shown in FIG. 7A is displayed on the display 203. As shown in the display 203, each voltage and current are displayed in a vector diagram. In addition, when the wave item is selected, each voltage and current are displayed as a waveform as shown in FIG. 7C. In addition, when the harmonics item is selected, each voltage and current are displayed in a graph form as shown in FIG. 7D.

Next, when the demand trend mode is selected in the initial menu as shown in FIG. 4, the demand amount is displayed in a graph form as shown in FIG. 8A, and when the demand item is simply selected, each phase demand, phase current demand and The peak value will be displayed.

This allows the administrator to analyze and confirm the power state measured by the digital power meter 100 in real time using wireless short-range communication in the field.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

According to the present invention described above, there is an effect that can wirelessly check a variety of information, such as voltage / current real-time waveform, demand trend, harmonic analysis, vector diagram in the field in real time.

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Claims (5)

delete Measures the voltage / current / power / power of the power line, converts it into an infrared signal for short-range wireless communication, performs short-range wireless communication using a digital power meter and infrared light, and converts the infrared signal from the digital power meter to infrared light. Receives and analyzes the transmitted power measurement data and displays the voltage / current as a real-time waveform, and displays a variety of information that cannot be displayed directly on the power meter such as demand trends, harmonic analysis, and vector diagrams. With; The power state analysis terminal, A mode setting unit for setting a mode for power state measurement and diagnosis; A memory for storing data transmitted from the digital power meter; An infrared transmitter / receiver for transmitting and receiving data with the digital power meter in infrared; An infrared communication unit connected to the infrared transmitter / receiver to perform short range wireless communication; A control unit controlling overall operation of the power state analysis terminal, controlling short-range wireless communication with the digital power meter through the infrared communication unit, storing received power measurement data in a memory, and controlling display of an analysis result; ; A voltage analyzer for analyzing a state of the voltage received through the infrared communication unit; A current analyzer for analyzing a state of the current received through the infrared communication unit; A power analyzer for analyzing power received through the infrared communication unit; A power factor calculator configured to calculate a power factor using the voltage / current received through the infrared communication unit; A diagnostic unit for performing a diagnosis of a power state under the control of the controller; And a display for displaying the analyzed voltage / current / power / power factor and a diagnosis result on the screen. The power state analysis terminal of claim 2, wherein the power state analysis terminal is compactly implemented to be portable for convenience of mobility and usability. delete The power state analysis of claim 2, wherein the mode setting unit comprises a voltage / current / power measurement mode, a diagnostic mode for vector / wave / harmonic diagnosis, a demand mode, and a menu setting mode for menu setting. terminal.

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