KR20160121725A - power dissipation measurement algorithm and equipment - Google Patents

power dissipation measurement algorithm and equipment Download PDF

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KR20160121725A
KR20160121725A KR1020150050901A KR20150050901A KR20160121725A KR 20160121725 A KR20160121725 A KR 20160121725A KR 1020150050901 A KR1020150050901 A KR 1020150050901A KR 20150050901 A KR20150050901 A KR 20150050901A KR 20160121725 A KR20160121725 A KR 20160121725A
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power
distribution system
measured
value
measuring
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KR1020150050901A
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Korean (ko)
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KR101674402B1 (en
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송수준
채수강
공남수
윤명섭
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(주)에스엔
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R21/00—Arrangements for measuring electric power or power factor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/10—Measuring sum, difference or ratio
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
    • G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
    • G01R22/061—Details of electronic electricity meters
    • G01R22/063—Details of electronic electricity meters related to remote communication

Abstract

The present invention measures power at at least two points of a power system of a power distribution system that enters into a building and compares the measured power values to detect power loss of the power system of the power distribution system and detects a circuit time difference between the input terminal and the output terminal And more particularly, to a lost power measurement algorithm and a loss power measurement apparatus using the lost power measurement algorithm that can measure the lost power by measuring the lost power by comparing the detected power values at the same time.

Description

TECHNICAL FIELD [0001] The present invention relates to a power dissipation measurement algorithm,

The present invention relates to a lost power measurement algorithm and an apparatus for measuring loss power using the same.

More particularly, the present invention relates to a method and apparatus for measuring power at at least two points in a power system of a power distribution system entering a building and comparing the measured power values to detect power loss of the power system of the power distribution system, And more particularly, to a lossy power measurement algorithm and a lossy power measurement apparatus using the lossy power measurement algorithm that can measure more accurate lossy power by measuring a lossy power by detecting a time difference by asynchronous measurement and comparing the detected power values at the same time.

A typical power system is divided into power generation, transmission, and distribution. Among these, the power distribution system is a line from a power plant, a substation or a transmission line to another power plant or substation, and to a power demand site. That is, the power supply system from the secondary substation to the customer is generally referred to as a power distribution system. These distribution systems include distribution substations, high-voltage distribution lines, distribution transformers, low-voltage distribution lines and lead-in lines, and in some cases, lines from the primary substation to the distribution substation may also be included.

Such a power distribution system can be classified into a load (load), a power line to be supplied to a small electric motor including a lamp and a refrigerator / washing machine connected to such a circuit, and a power line to be supplied to a general motor, There is a distinction between a special high-voltage line, a high-voltage line and a low-voltage line.

Such a power distribution system mainly includes a circuit breaker, a switch, and a relay. Such a power distribution system distributes power by lowering the high voltage power to a low voltage. Power loss occurs in the power distribution system. Various techniques for reducing such power loss have been developed In order to reduce power loss, it must be able to detect power loss.

There are various techniques for detecting the power loss of the power distribution system, examples of which include Patent Documents 1 and 2.

Patent Document 1 discloses a method of designing a building, comprising: a) inputting a design drawing of a building, inputting static data including a length and a capacity for each component of the power facility; b) inputting dynamic data in steady state for a component having a dynamic characteristic including a generator and a load in the power facility; c) setting algae amount limit and voltage range for each line, and performing algae calculation and fault calculation of the distribution system through a quantitative numerical analysis algorithm; d) Calculating the amount of algae per line, calculating the voltage of each line and calculating the fault current for each circuit breaker, and calculating the current value, the voltage value and the fault current value for the entire section; And e) use the calculated values to determine the current state of the distribution system to check for violations in line tide and bus voltage, and to perform real-time monitoring and control functions by applying an optimization analysis algorithm for power facilities. And displaying the recommendation necessary for optimum operation on a user screen in cooperation with each other. The present invention relates to a method for evaluating optimal reliability of a distribution system,

In Patent Document 2, a Y bus matrix of a power distribution system is constructed, an initial value of a system is set, an initialization step of calculating a no-load voltage by only a voltage source, a load distribution is performed by state estimation, And an iterative calculation step of determining convergence by confirming the deviation.

Such conventional techniques have a problem that it is difficult to measure a loss occurring between systems because measuring instruments for a power system of a power distribution system measures a power element at a single point.

1. Korean Patent Publication No. 2013-0140237 2. Korea Patent No. 1221083

It is an object of the present invention to provide an algorithm and an apparatus for measuring a loss of a power system of a power distribution system which is led into a building.

More specifically, the present invention measures the power value at at least two points of a power system of a power distribution system and compares the measured power values to measure the power loss between the power systems of the power distribution system, And an object of the present invention is to provide a power measurement algorithm and an apparatus for measuring loss power using the same.

In order to accomplish the above object, there is provided a method of measuring loss power using a loss power measurement algorithm according to the present invention is a method for measuring loss power of a power system of a power distribution system for distributing electricity to an electric facility in a building, Measuring the power value at the same time with a time difference and measuring the loss power of the power distribution system power plant from the difference between the measured input power values and the respective output power values, The power consumption of the power system of the power distribution system is measured by comparing the power value of the input / output terminal detected at the same time point detected at the same time when the detected power value at the input terminal and the output terminal is detected using the time difference detection algorithm .

The time difference detection algorithm calculates the difference between the input power values (A 1 to A n ) measured at the input stage of the power distribution system power plant and the output power values (B 1 to B 2n ) measured at the output stage of the power distribution system power plant Output power difference value having a difference between the input and output power values having the minimum standard deviation is compared with the standard deviation obtained from the set of the plurality of input and output power difference values having the difference value between the input and output power values, As power loss of the power distribution system power plant.

Also, if the type of the measuring instrument that detects the power value at the input stage and the output stage is different, the sampling frequency can be synchronized by the frequency synchronization algorithm.

In another aspect of the present invention, there is provided an apparatus for measuring loss power using a loss power measurement algorithm, the apparatus comprising: a loss measurement unit for measuring a power factor at two measurement points of the distribution system power facility, Measuring instrument; A communication unit for receiving data measured by the meter and transmitting processed data; And a processing unit for measuring the data measured by the measuring unit and received through the communication unit by a lossy power measuring algorithm.

The lossy power measurement algorithm includes a time difference detection algorithm for detecting whether a power value sensed by two meters detects a difference according to a circuit time difference and detects a sensed power value at the same time, It is preferable to detect the power value of the measuring instrument and set the difference between the power values of the two meters detected at the same point in time as the loss power of the power distribution system power facility.

The processor may comprise a microprocessor and a memory for storing the measured power value.

In addition, the processing unit may be connected to an external computer via a communication module to enable remote monitoring.

As described above, the lossy power measurement method and apparatus using the lossy power measurement algorithm according to the present invention detects the circuit time difference of the measured power value by comparing the power values measured at at least two points of the power system of the power distribution system, It is possible to obtain more accurate loss power information by calculating the loss power by comparing the two power values measured at the same time from the time difference information.

1 is a block diagram of an apparatus for measuring lost power using a lost power measurement algorithm according to the present invention
2 is a flowchart of a lossy power measurement process using a lossy power measurement algorithm according to 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.

Like reference numerals are used for like elements in describing each drawing. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

FIG. 1 is a configuration diagram of a lossy power measurement apparatus using a lossy power measurement algorithm according to the present invention, and FIG. 2 is a flowchart illustrating a lossy power measurement algorithm according to the present invention.

The present invention can more accurately measure the lost power between power distribution system power plants.

The method for measuring the loss power of a power system of a power distribution system for distributing electricity to an electric facility in a building according to the present invention can measure the loss power using the power difference at the same point of time of the power system of the power distribution system, Power can be measured.

In the technique of the present invention, the loss power is measured by a difference value between the power values sensed by the two meters 10i and 10o, and the power value measured by each of the meters 10i and 10o It is not possible to accurately measure the loss power generated in the power distribution system power plant. Therefore, the measurement point in time of each of the meters 10i and 10o finds the same point in time, have.

That is, in the lossy power measurement method using the lossy power measurement algorithm of the present invention, the power values are simultaneously measured in the two meters 10i and 10o installed at the input and output terminals of the power system of the power distribution system, The power loss of the power distribution system power plant is measured from the difference between the input and output power values (A 1 to A n ) and the output power values (B 1 to B 2n ).

In this case, when comparing the input power measurement value measured at different points in time and the output power measurement value, the two power values in the delayed state are compared by the circuits or components constituting the power distribution system, so that the actual loss power measurement can not be made .

Therefore, the same viewpoint is detected using the same viewpoint detection algorithm.

The same point-in-time detection algorithm uses the input power values (A 1 ~A n ) measured at the input of the power distribution system power plant and the different time differences of the output power values (B 1 ~B 2n ) measured at the output stage of the power distribution system power plant Output power difference value having a minimum standard deviation by comparing the standard deviation obtained from the set of the plurality of input / output power difference values having the difference value of the input / output power value having the minimum standard deviation.

Specifically, the same point-in-time detection method measures input power values (A 1 to A n ) repeatedly at a predetermined interval (? T) while measuring power values at each of the input terminal 10i and the output terminal 10o, And output power values (B 1 to B 2n ), and sets the power values (A 1 to A n, B 1 to B 2n ) thus obtained using the difference values.

That is, at the same time, the input power values A 1 to A n and the output power values B 1 to B 2n of the two meters 10i and 10o are measured, and the set of difference values of the power values is made as follows.

Figure pat00001

Where n is a natural number.

The standard deviations of each set are calculated, and the smallest standard deviation among the calculated standard deviations is set to the same point. The power values of the input / output stages at the same point in time are compared with each other, To measure.

The small standard deviation of each set means that the power measured by both instruments (10i, 10o) is the measured value at the same maximum point. The fact that the standard deviation is close to zero means that the measured data is close to the average value. The time-dependent graph of the measured power value at the instrument will have a similar shape.

In the lossy power measurement method using the lossy power measurement algorithm as described above, there is no problem when the two instruments 10i and 10o have the same characteristics, but when there are different characteristics, data (power value) is collected Since the frequency is different, the number of data of the same time consent may be different.

When the number of measured data (power values) is different, it is impossible to compare the power values at the input / output stage to measure the loss power of the power distribution system power facility. The number of data (power values) collected during the same time must be synchronized to the same value.

If the types of instruments that detect the power value at the input and output stages are different, a frequency synchronization algorithm is performed to synchronize the sampling frequency.

The frequency synchronization algorithm uses the interpolation method to obtain the interpolation formula of the data of the small number of data and predicts the measurement value of the interval between them. The number of the measured power value of the small number of the measuring instrument is set to the measured power value To the number of pixels.

As shown in FIG. 1, the apparatus for measuring the repair power using the above-described algorithm includes measuring devices 10i and 10o for measuring electric power elements at two measurement points of the power distribution system 100, And a processing unit 30 for performing arithmetic processing on one piece of data by a lossy power measurement algorithm.

It is preferable that the meters 10i and 10o are installed at the input and output ends of the power system 100 of the power distribution system and the information measured by the meters 10i and 10o is transmitted to the processing unit 30 The communication unit 20 further includes a communication unit 20,

As shown in FIG. 1, the communication unit 20 can use a standard standard interface used for a modem, a personal computer, and the like.

The processing unit 30 includes a memory 30m for storing the measured power value, which is composed of a microprocessor having a program according to the loss power measurement algorithm as described above.

Since the loss power measurement algorithm has already been described above, a further description is omitted.

The loss power measuring apparatus using the loss power measuring algorithm of the present invention configured as described above can be integrally installed at one side of the power system of the power distribution system and can be provided with a monitor 40 for displaying the measured repair power A display lamp 60 for indicating whether the apparatus is driven, and a switch 50 for turning the apparatus on / off.

It is desirable to be able to easily monitor the information of the installed loss power measuring device in the control panel of the operation.

The processing unit 30 is preferably connected to an external computer 70 through a communication module 70m. Of course, the computer 70 may be provided with a program according to the loss power measurement algorithm described above to receive the power value measured by the meter of the measurement apparatus and measure the loss power again.

The communication module 70m may be a wired or wireless device.

10i, 10o: Instruments
20: communication unit 30:
40: monitor 50: switch
60: Operation indicator
70: computer 70m: communication module

Claims (7)

CLAIMS 1. A method for measuring the loss power of a power distribution system power distribution system for distributing electricity to an electrical facility in a building,
Measuring a power value at the same time with a time difference between an input terminal and an output terminal of the power distribution system power plant and measuring a loss power of the power distribution system power facility from the difference between the measured input terminal power values and the respective output terminal power values, A time difference detection algorithm that detects a circuit time difference between an input terminal and an output terminal of the electric power facility is used to detect the same point of time at which the detected power value at the input and output terminals is detected and to compare the power values of the input / And the loss power of the power system of the power distribution system is measured. The method according to claim 1,
The time difference detection algorithm calculates the difference between the input power values (A 1 to A n ) measured at the input stage of the power distribution system power plant and the output power values (B 1 to B 2n ) measured at the output stage of the power distribution system power plant Output power difference value having a difference between the input and output power values having the minimum standard deviation is compared with the standard deviation obtained from the set of the plurality of input and output power difference values having the difference value between the input and output power values, Is detected as the loss power of the power system of the power distribution system. The method according to claim 1,
If the type of the measuring instrument that detects the power value at the input stage and the output stage is different, the sampling frequency is synchronized by the frequency synchronization algorithm,
The frequency synchronization algorithm uses the interpolation method to obtain the interpolation formula of the data of the small number of data and predicts the measurement value of the interval therebetween to determine the number of the measured power value of the small number of the measuring device as the measured power value The loss power measurement method using the lost power measurement algorithm.
1. An apparatus for measuring power loss of a power distribution system power plant (100)
A meter (10) for measuring power elements at two measurement points of the power distribution system power plant;
A communication unit 20 for receiving data measured by the meter and transmitting processed data; And
And a processing unit (30) for measuring the data measured by the measuring unit and receiving data received through the communication unit by a lossy power measurement algorithm. 5. The method of claim 4,
The lossy power measurement algorithm includes a time difference detection algorithm for detecting whether a power value sensed by two meters detects a difference according to a circuit time difference and detects a sensed power value at the same time, And detects the power value of the measuring instrument and detects the difference between the power values of the two meters detected at the same point in time as the loss power of the power distribution system power facility. 5. The method of claim 4,
Wherein the processing unit (30) comprises a microprocessor and a memory (30m) for storing the measured power value. 5. The method of claim 4,
And the processing unit (30) is connected to an external computer through a communication module (70m).

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US20080313006A1 (en) * 2006-08-24 2008-12-18 Blue Pillar, Inc. Systems, methods, and devices for managing emergency power supply systems
KR20110021952A (en) * 2008-05-27 2011-03-04 파워-원 인코포레이티드 Apparatus and method of optimizing power system efficiency using a power loss model
KR101052113B1 (en) * 2010-05-10 2011-07-26 이현창 Apparatus and method for inspecting power line and current loss by measuring current waveform similarity
KR101212579B1 (en) * 2012-04-30 2012-12-14 (주)에스엔 Distributing board measuring power loss and comparing input harmonic signal and output harmonic signal
KR101221083B1 (en) 2011-05-25 2013-01-11 주식회사 파워이십일 Method for assume condition of power distribution System
KR20130140237A (en) 2012-06-14 2013-12-24 주식회사 파워이십일 Optimal reliability evaluation system of distribution system and the methods

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080313006A1 (en) * 2006-08-24 2008-12-18 Blue Pillar, Inc. Systems, methods, and devices for managing emergency power supply systems
KR20110021952A (en) * 2008-05-27 2011-03-04 파워-원 인코포레이티드 Apparatus and method of optimizing power system efficiency using a power loss model
KR101052113B1 (en) * 2010-05-10 2011-07-26 이현창 Apparatus and method for inspecting power line and current loss by measuring current waveform similarity
KR101221083B1 (en) 2011-05-25 2013-01-11 주식회사 파워이십일 Method for assume condition of power distribution System
KR101212579B1 (en) * 2012-04-30 2012-12-14 (주)에스엔 Distributing board measuring power loss and comparing input harmonic signal and output harmonic signal
KR20130140237A (en) 2012-06-14 2013-12-24 주식회사 파워이십일 Optimal reliability evaluation system of distribution system and the methods

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