KR101957729B1 - Apparatus for measurementing isolation having self calibration function and method thereof - Google Patents

Abstract

Disclosed are an insulation measuring apparatus having a self-calibration function and a method thereof. According to a specific embodiment of the present invention, a measuring unit of the insulation measuring apparatus is provided so as to be detachable from and to main equipment and applicable to a plurality of equipment. The measuring unit, which is provided for measuring actual measurement values of actually measured current, voltage, temperature and the like of the main equipment, is prepared in an insulation state, and thereby the safety for high current and high voltage measurement of the connected main equipment can be secured. The insulation measuring apparatus can easily perform the calibration of the main equipment in accordance with the actual measurement values of the main equipment due to a calibration parameter for the corresponding main equipment, so that the calibration of the main equipment is conducted in real time.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an insulation measuring apparatus and method having a self-

The present invention relates to an insulation measuring apparatus and method having a self-calibrating function, and more particularly, to a technique for calibrating a substation apparatus so as to operate normally based on actual measured values of current, voltage, .

Periodic facilities such as plants and power plants are configured to monitor in real time whether equipment is operating normally.

Therefore, measuring instruments for measuring voltage, current, resistance, fluid pressure, etc. are installed all over the facilities of large plants and power plants, and it is possible to grasp in real time whether abnormality occurs in each process through the measuring machine. To take immediate action.

However, these instruments must be replaced for long-term use or corrected as needed. The error of the measured value gradually increases at the time of long-term use, and accurate measurement may not be performed. Numerous instrument gauges are always on and running. Managing these instruments and correcting or replacing them in a timely manner is a very difficult and challenging task.

In the past, a field supervisor has performed on-site verification for each measuring instrument in a pair of two to perform calibration or replacement of the measuring instrument. However, the on-site verification of such measuring instruments requires a lot of manpower, and also places considerable burden on the calibration time and costs.

At the site confirmation of the measuring instrument, the instrument is separated from the equipment to check whether there is an error. The field personnel check the error of the measuring instrument by subjective judgment. In addition, since the devices for error determination are different for each measurement device, it is not possible to simultaneously check various kinds of measurement devices.

In addition, it is not a matter of judging whether a measurement error has occurred in a large number of measuring instruments in advance, and instead of performing a calibration or replacement of measuring instruments in which measurement errors have already occurred, the monitoring system of the equipment is considerably loopholes It is a fact that it is occurring.

SUMMARY OF THE INVENTION The present invention has been made in order to solve all of the problems of the prior art, and it is an object of the present invention to provide a measuring apparatus for measuring a high- And to provide a measuring apparatus and method having a self-calibration function capable of ensuring safety and easily performing calibration of a base equipment according to measured values of the base equipment due to the calibration parameters of the base equipment.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention which are not mentioned can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. It will also be readily apparent that the objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.

According to an aspect of the present invention, there is provided a measuring apparatus having a self-

A measuring unit provided with a plurality of sensors for detecting voltages, currents, temperatures, and pressures of connected equipment, and outputting measured values of the respective sensors;

A reference voltage generator for generating a reference voltage for diagnosing whether or not a normal conversion is performed when converting each of the received analog form actual values into a digital form; And

And receiving the reference voltage of the measurement unit and the reference voltage of the reference voltage generator, converting each of the measured values into a digital form to generate actual information including actual current information, actual voltage information, and temperature information, And a processing unit for setting a calibration parameter of the periodic facility based on the pre-stored judgment reference value.

Preferably, the measuring unit may be detachably installed in the substation or measuring device in the form of a single module, and the plurality of sensors may be provided in an insulated state.

Preferably, the processing unit includes: an A / D conversion module for converting actual measured values of the received analog form measurement units into digital form to generate actual measurement information; A storage module for storing a determination reference value for diagnosing whether each of the pieces of actual information is normal or not; An arithmetic module for calculating error between the first and second determination reference values of the storage module stored in correspondence with the actual information and actual information to derive actual error information for each real information; And a calibration parameter setting module for setting a calibration parameter for correcting the measured voltage and the measured current of the substation equipment according to the measured error temperature based on each of the measured errors.

Preferably, the processing unit may further include a communication module for delivering the set calibration parameter to the portable terminal through the communication network, and for transmitting the calibration command for the received facility based on the portable terminal to the facility.

In the measurement method having the self-calibration function according to another embodiment of the present invention using the measurement apparatus having the self-calibration function,

Performing a function of outputting a measured value of each sensor by a plurality of sensors that detect voltage, current, temperature, and pressure of the connected equipment based on a detachable measuring device in the equipment or measuring device; Generating a reference voltage for diagnosing whether or not the normal conversion is performed in converting the received analog type measured values into digital form based on a reference voltage generating unit that generates a constant voltage at a predetermined period of time; The processor receives the measured value of the measuring unit and the reference voltage of the reference voltage generator, converts each of the measured values to a digital form to generate actual information including actual current information, actual voltage information, and temperature information, And setting calibration parameters of the equipment based on the measured information and pre-stored reference values, and transmitting the calibration parameters to the equipment.

According to the present invention, the measuring unit of the measuring apparatus can be detachably attached to the main equipment and can be applied to a plurality of equipment, and the measuring unit for measuring the measured values of the measured current, voltage, Therefore, it is possible to secure safety against high-current and high-voltage measurement of the connected infrastructure, and it is possible to easily calibrate the infrastructure according to the measured value of the infrastructure due to the calibration parameters of the corresponding infrastructure, The effect of calibration of the facility is obtained.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description of the invention given below, serve to further understand the technical idea of the invention. And should not be construed as limiting.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a configuration of a measuring apparatus having a self-calibration function according to an embodiment of the present invention. FIG.
2 is a view showing a detailed configuration of a processing unit of a measuring apparatus having a self-calibration function according to an embodiment of the present invention.
3 is a view showing a main board of a measuring apparatus having a self-calibration function according to an embodiment of the present invention.
4 is a flowchart illustrating a measurement process having a self-calibration function according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Brief Description of the Drawings The advantages and features of the present invention, and how to accomplish them, will become apparent with reference to the embodiments described hereinafter with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

The terms used in this specification will be briefly described and the present invention will be described in detail.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. Also, in certain cases, there may be a term selected arbitrarily by the applicant, in which case the meaning thereof will be described in detail in the description of the corresponding invention. Therefore, the term used in the present invention should be defined based on the meaning of the term, not on the name of a simple term, but on the entire contents of the present invention.

When an element is referred to as "including" an element throughout the specification, it is to be understood that the element may include other elements as well, without departing from the spirit or scope of the present invention. Also, as used herein, the term "part " refers to a hardware component such as software, FPGA or ASIC, and" part " However, "part" is not meant to be limited to software or hardware. "Part" may be configured to reside on an addressable storage medium and may be configured to play back one or more processors.

Thus, by way of example, and not limitation, "part (s) " refers to components such as software components, object oriented software components, class components and task components, and processes, Subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays and variables. The functions provided in the components and "parts " may be combined into a smaller number of components and" parts " or further separated into additional components and "parts ".

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the exemplary embodiments of the present invention, descriptions of techniques which are well known in the technical field of the present invention and are not directly related to the present invention will be omitted. This is to omit the unnecessary description so as to convey the key of the present invention more clearly without fading.

In the present invention, the measuring device S is normally installed in a large-scale plant or a smart grid of a home, and is configured to monitor normal operation. Various measuring instruments such as a voltmeter and an ammeter are constantly operated have.

That is, according to the present invention, the measurement apparatus S is always mounted on the ground apparatuses to monitor whether or not the apparatus is normally operated, and calibration for correcting the measurement apparatus so that the measured values of the measurement apparatuses match the predetermined reference values It is a technique that provides parameters.

FIG. 1 is a configuration diagram of a measuring apparatus having a self-calibration function according to an embodiment of the present invention. FIG. 2 is a detailed configuration diagram of the processing unit shown in FIG. 1. Referring to FIG. 1 and FIG. 2, The measurement apparatus S according to the embodiment of the present invention may include a measurement unit 100, a reference voltage generation unit 200, and a processing unit 300. The metering device S is configured to generate a calibration parameter without separating it from the facility.

Here, the measuring unit 100 performs a function of outputting measured values including voltage, current, temperature, pressure, and the like of the connected equipment. The measuring unit 100 is operated as a plurality of sensors that output measured values including a measured current, an actual voltage, a measured temperature, and the like as resistance values varying according to currents and voltages flowing in the equipment. The measuring unit 100 for receiving the measured values output from the plurality of sensors may be configured in a form of a slot board, and the slot board may include a current slot card, a voltage slot card, a temperature slot card, and the like.

In addition, the measuring unit 100 connected to the sub equipment may be detachably installed in the sub equipment or the measuring equipment S in the form of a single module. The input and output terminals of the measuring unit 100 are electrically insulated, Therefore, it is possible to measure high voltage and high current.

The reference voltage generator 200 is configured to generate a reference voltage to be supplied to the A / D / varying module 310 of the processing unit 300, which will be described later, Is a voltage for diagnosing whether or not a normal conversion is performed in converting into a digital form, and is generated in a predetermined time period.

That is, the measured value with respect to the temperature of the installed facility is rapidly changed according to the surrounding temperature, so that the measuring apparatus S according to the present invention should diagnose whether the rapidly changed measured value is converted into the digital form. In order to diagnose whether or not the digital signal is normally converted, the reference voltage generator 200 generates the digital signal at the above-mentioned time period and is transmitted to the A / D conversion module. The reference voltage is converted into a digital signal (Usually a constant voltage, for example, a constant voltage of 2.5 V). A series of processes for diagnosing whether or not to convert to a digital form based on the reference voltage can be understood by those skilled in the art in connection with the embodiments of the present invention.

On the other hand, the processing unit 300 receives the measured value of the measuring unit 100 and the reference voltage of the reference voltage generator 200, converts each of the received measured values into a digital form, and outputs actual measured current information, actual measured voltage information, D conversion module 310, a storage module 320, and a storage module 320. The storage unit 320 stores the actual measurement information and the calibration reference parameters, An arithmetic module 330, and a calibration parameter setting module 340.

The A / D conversion module 310 converts each of the measured values of the received analog type measurement unit 100 into digital form to generate actual measurement information. Here, the actual information refers to the measured current information in digital form with respect to the measured current, the actual measured voltage information in digital form with respect to the actual voltage, and the measured temperature information in digital form with respect to the measured temperature. At this time, a series of processes of converting the analog form of the measured values and the measured values into the digital form can be understood by those having ordinary skill in the art related to the embodiments of the present invention.

On the other hand, the storage module 320 generates a determination reference value for operating the base equipment normally with respect to each of the measured values such as the actual voltage, the measured current, and the temperature of the measurement unit 100 for each equipment, And is stored as a table value corresponding to the measured voltage, measured current, and temperature of the equipment. At this time, the storage module 320 may be implemented in various forms (Flash, HDD, RAM, ROM, etc.) according to the types of equipment of each period. For example, the storage module 320 may be implemented as a flash memory.

In addition, the determination reference values are stored in a look-up table of the storage module 320 so as to operate the apparatus in an optimal state as a result value obtained through a plurality of tests.

The actual information of the A / D conversion module 310 and the reference value of the storage module 320 are transmitted to the calculation module 330.

The calculation module 330 computes the error between the first and second determination reference values and the actual information of the storage module 320 stored and matched with the actual information to derive the actual error information for each actual information.

Here, the measured error information includes an actual error current, which is an error between the measured current of the measuring unit 100 of the digital form, and the first determination reference value, and an actual error of the digital form of the measured unit 100, Error voltage, an actual error temperature which is an error between the measured temperature of the measuring unit 100 in digital form and the third determination reference value, and the like.

The actual error information of the calculation module 330 is transmitted to the calibration parameter setting module 330.

The calibration parameter setting module 330 sets a calibration parameter for correcting the actual voltage and the actual current of the substation equipment based on the actual error temperature based on each of the measured errors. The calibration parameter is set as a lookup table value corresponding to the received measurement error information and the temperature error information. The calibration parameter, which is matched with the received measurement error information and the temperature error information, is stored in the calibration parameter setting module 330 . Based on these calibration parameters, a correction to the term facility is performed. A series of procedures for performing calibration for a periodic facility based on the calibration parameters described above can be performed by analyzing whether the measured value of the periodic facility is within the tolerance range set by the manufacturer and performing calibration / It is the same as or similar to the general procedure for performing the correction in advance.

Meanwhile, the calibrating parameters for the actual voltage and the actual current according to the measured voltage, the measured current, and the temperature and the temperature for the set period equipments are transmitted to the monitoring device connected through the wired line, It is possible to monitor operation status and abnormality and calibrate the infrastructure.

The processing unit 300 is connected to the measurement apparatus S through a wireless communication network, monitors the operation status and abnormality of the equipment, receives calibration parameters and calibrates the equipment, and measures the actual voltage, And a communication module 350 for transmitting calibration parameters for the measured voltage and the measured current according to the temperature and the temperature. The portable terminal that receives the actual voltage, measured current, and temperature of the measuring device S through the communication module 350 and the calibration parameters monitors the operation status and abnormality of the equipment and calibrates the equipment.

The communication module 350 may be a local area network (WLAN), a Bluetooth, a ZigBee Pro, an IEEE 802.15.4 c / d, or an IEEE 802.15. NAN-based ZigBee communication network, IEEE 802.14.4, ZigBee, Z-wave, INSTEON, or Wavents based low-power low-speed WPAN and RFID / USN integrated platform network using sensor network in its own solution And shall not be limited to this.

FIG. 3 shows a main board for the measurement apparatus S shown in FIG. 2. Referring to FIG. 3, the measurement apparatus S can be manufactured in the form of a single board. It is manufactured in the form of one module and is detachable from the measuring apparatus S or the infrastructure.

A series of processes that are connected to the period facility to generate calibrating parameters for calibrating the facility equipment according to the measured results including the measured current and actual voltage provided from the equipment and the measured temperature of the equipment, Will be described with reference to FIG.

FIG. 4 is a flowchart illustrating an operation process of the measurement apparatus S shown in FIG. 1. Referring to FIG. 4, a measurement process having a self-calibration function according to another embodiment of the present invention will be described.

First, the measuring unit 100 measures the voltage and current of the equipment and the temperature at which the equipment is mounted, and provides the measured values including the measured voltage, the measured current, and the measured temperature to the processing unit 300 (S1 ).

Meanwhile, the reference voltage generator 200 generates a predetermined reference voltage at a predetermined time period and transmits the reference voltage to the processor 300 (S2).

The received analog value is converted into a digital form by the A / D conversion module 310 of the processing unit 300 to generate actual information, diagnoses whether or not it is normal conversion based on the received reference voltage, And transmits the actual information converted into the digital form to the calculation module 330 (S3, S4).

At this time, the matching reference values stored for each actual information are read from the storage module 320 and transmitted to the operation module 330. The computation module 330 computes the error between the reference value and the measured value for each of the received measured values and outputs the measured error information. The measured error information is transmitted to the calibration parameter setting module 340. The calibration parameter setting module 340 The calibrated parameters obtained after reading the calibration parameters matched to the respective measured error information are transmitted to the portable terminal through the communication module 350 or transmitted to the monitoring device through the cable (S5 to S7). Accordingly, the calibration of the periodical facility based on the monitoring device or the portable terminal is performed (S8).

Accordingly, since the measuring unit of the measuring apparatus is provided so as to be detachable from the main equipment and applicable to a plurality of equipment, and the measuring unit for measuring the measured values of the measured current, voltage and temperature of the equipment is provided in an insulated state It is possible to secure the safety of high-current and high-voltage measurement of the connected infrastructure, and it is possible to easily perform the calibration of the infrastructure according to the measured value of the infrastructure due to the calibration parameters of the corresponding infrastructure, Can be corrected.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. It can be understood that it is possible.

The measuring unit of the measuring apparatus is detachable from the main equipment and can be applied to a plurality of equipment, and the measuring unit for measuring the measured values of the measured current, voltage, and temperature of the equipment is provided in an insulated state, It is possible to secure the safety of the high current and high voltage measurement of the facility and to calibrate the facility according to the measured value of the facility due to the calibration parameter of the facility during the period, It is possible to make a great progress in terms of accuracy and reliability of operation of the measuring apparatus and method having the self-calibration function and further to improve the performance efficiency, and it is also possible to provide a calibration apparatus However, since it is practically possible to carry out clearly, The invention there is the potential for.

Claims (6)

A measurement unit detachably installed in the periodic facility or the measurement device and provided with a plurality of sensors for detecting voltage, current, temperature, and pressure of the facility, and outputting measured values of the respective sensors;
A reference voltage generator for generating a reference voltage for diagnosing whether or not a normal conversion is performed when converting each of the received analog form actual values into a digital form; And
And receiving the reference voltage of the measurement unit and the reference voltage of the reference voltage generator, converting the received measured values into digital form to generate actual information including actual current information, actual voltage information, and temperature information, And a calibration section for setting calibration parameters for the period equipments to be calibrated so as to be matched with the predetermined judgment reference values in accordance with the environment,
The measuring unit
In order to secure the safety of the high-voltage and high-voltage measurement of the infrastructure, each sensor is insulated,
Wherein,
Further comprising a monitoring device that receives the calibration parameters and monitors the operation status and abnormality of the equipment and corrects the equipment based on the monitoring result.
The apparatus according to claim 1,
Wherein the measuring device is provided so as to be detachable in a periodic facility or a measuring device in the form of one module. delete The apparatus according to claim 1,
An A / D conversion module for converting each of the measured values of the received analog type measurement units into digital form to generate actual measurement information;
A storage module for storing a determination reference value for diagnosing whether each of the pieces of actual information is normally operated;
An arithmetic module for calculating error between the first and second determination reference values of the storage module stored in correspondence with the actual information and actual information to derive actual error information for each real information; And
And a calibration parameter setting module for setting a calibration parameter for correcting an actual voltage and an actual current of the substation equipment according to the measured error temperature based on each of the measured errors. 5. The apparatus according to claim 4,
Further comprising a communication module for delivering the set calibration parameters to the portable terminal through a communication network and for transmitting a calibration command for the received terminal equipment to the terminal equipment based on the portable terminal. Performing a function of outputting a measured value of each sensor by being provided with a plurality of sensors for detecting voltages, currents, temperatures, and pressures of the connected equipment based on detachable measuring units in the equipment or measuring apparatuses;
Generating a reference voltage for diagnosing whether or not the normal conversion is performed in converting the received analog type measured values into digital form based on a reference voltage generating unit that generates a constant voltage at a predetermined period of time; And
The processor receives the measured value of the measuring unit and the reference voltage of the reference voltage generator, converts each of the measured values to a digital form to generate actual information including actual current information, actual voltage information, and temperature information, Correcting the measured information to match a predetermined reference value according to an external environment, and transmitting the corrected reference information to the equipment,
In order to secure the safety of the high-voltage and high-voltage measurement of the infrastructure, each sensor is insulated,
Further comprising the step of monitoring the operation status and abnormality of the equipment and receiving the calibration parameters of the processing unit, and calibrating the equipment according to the monitoring result.

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