KR200397632Y1 - n-phase power harmonics detection shape watt hour meter - Google Patents
n-phase power harmonics detection shape watt hour meter Download PDFInfo
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- KR200397632Y1 KR200397632Y1 KR20-2005-0017965U KR20050017965U KR200397632Y1 KR 200397632 Y1 KR200397632 Y1 KR 200397632Y1 KR 20050017965 U KR20050017965 U KR 20050017965U KR 200397632 Y1 KR200397632 Y1 KR 200397632Y1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/30—Dynamo-electric motor meters
- G01R11/32—Watt-hour meters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/56—Special tariff meters
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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
- G01R21/133—Arrangements for measuring electric power or power factor by using digital technique
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
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- Measurement Of Current Or Voltage (AREA)
Abstract
수용가가 특정한 전력 요금주기 동안에 중성선(N상)에 검출된 전력량에 대해 각 수용가 에게 전력요금을 보다 정확하게 부과 되도록 소비전류를 측정하기 위해 전력측정 회로 에서 중성선(N상)전력도 검출 할 수 있는 적산 전력량계 장치 에 대하여 제공한다.An integrator that can also detect neutral (N-phase) power in the power measurement circuit to measure the current consumption so that customers are charged more accurately to each customer for the amount of power detected on the neutral (N-phase) during a specific power billing cycle. Provided for the electricity meter device.
본 고안에 따르면 N상 전력 및 고조파 전류 검출회로로 구성 되어 있으며, 기존에는 각상(R,S,T)에 검출된 소비전력 만을 측정 하여 수용가 에게 요금을 부과 하였으나 본 고안 으로 중성선(N상)의 소비전력도 측정하여 기존 요금체계의 검출부에 전력요금을 합산하여 수용가 에게 보다 정확하게 전력 요금을 부과 할 수 있는 적산 전력량계 장치 이다.According to the present invention, it is composed of N phase power and harmonic current detection circuit. In the past, only the power consumption detected in each phase (R, S, T) was measured and the customer was charged. It is an integrated electricity meter device that can measure the power consumption and add the electricity rate to the detection part of the existing tariff system to impose a more accurate electricity rate on the customer.
Description
전력회사 에서 전력량을 측정하기 위해 현재 사용하고 있는 3상4선식 전력량계는 R상, S상, T상 및 N상으로 이루어져 있으며, 계량방법은 각 상(R,S,T)전류를 측정하여 계량하는 방식으로 구성되어 있다. 평형부하에서는 각 상(R,S,T) 전류가 평형 상태이며 N상에는 별도의 전류가 나타나지 않지만, 불 평형 부하에서는 각 상(R,S,T) 불 평형에 의한 전류가 N상에 나타난다.The three-phase four-wire electricity meter currently used by the utility company to measure power is composed of R phase, S phase, T phase, and N phase, and the metering method measures each phase (R, S, T) current. It is organized in such a way. At equilibrium loads, each phase (R, S, T) current is in equilibrium and no current is present at the N phase, but at unbalanced loads, currents due to each phase (R, S, T) imbalance are shown in the N phase.
이처럼 N상에 전류가 발생하는 것은 각 상 별 부하 불 평형에 기인하여 나타나는 것으로서, N상 전류가 발생하더라도 실제 사용부하에 대한 전력량계의 계량에는 집계가 않된다.The generation of current in the N phase is caused by the load imbalance of each phase. Even when the N phase current occurs, it is not counted in the meter of actual use load.
이 외에 영상 고조파 전류가 발생하는 원인으로는 비선형부하(정류기, 인버터, UPS, 컴퓨터, 모니터, 복사기 등) 또는 전기로, 용접기 등과 같이 고조파를 발생하는 부하가 있을 경우에는 √((불 평형전류)2+(상 고조파전류합성)2)에 상당하는 전류가 중성선(N상)에 흐르나 전력량계의 계량에는 집계가 되지 않는다.Other sources of harmonic current include nonlinear loads (rectifiers, inverters, UPSs, computers, monitors, copiers, etc.) or √ ((unbalanced current) when there is a load that generates harmonics, such as an electric furnace or welding machine. A current equivalent to 2+ (phase harmonic current synthesis) 2) flows through the neutral line (N phase), but it is not counted in the metering.
본 고안은 평형부하에서나 불 평형부하 에서도 각 상(R,S,T) 및 N상의 전류가 전력량계의 집계에 나타날 수 있도록 Current Transformer (변류기)및 SHUNT(분류기)를 설치하여 N상의 소비전류를 집계하여 요금체계의 검출부에 전력요금을 합산하여 수용가 에게 보다 정확하게 전력 요금을 부과할 수 있는 적산 전력량계 장치 이다.The present invention aggregates the current consumption of the N phases by installing a current transformer and a SHUNT so that the currents of each phase (R, S, T) and N phases can appear in the aggregate of the electricity meter even at the balanced load or the unbalanced load. Therefore, it is an integrated watt-hour meter that can charge the customer more accurately by summing up the electric charge in the detector of the tariff system.
본 고안의 목적은 수용가의 특정한 전력 요금 주기 동안에 소모된 각상(R,S,T)의 전력량에 대해 각 수용가에게 전력요금 을 보다 정확하게 할당하도록 전압-전류 반응을 측정하기 위한, 전력측정회로내에 중성선(N상)의 소모 전력을 추가 측정하여 기존 요금체계의 검출부에 중성선(N상)의 전력요금을 합산하여 수용가 에게 보다 정확하게 전력 요금을 부과 할 수 있는 젓산 전력량계 이다.The object of the present invention is to provide a neutral line in the power measurement circuit for measuring the voltage-current response to more accurately allocate the power rate to each customer for the amount of power of each phase (R, S, T) consumed during the customer's specific power rate cycle. It is a lactic acid meter that can measure the power consumption of (N-phase) and add the electricity rate of the neutral wire (N-phase) to the detection part of the existing tariff system to impose more accurate power rates on the customers.
공심 변압기와 같은 전류 입력장치는 전력량계 회로에 연결된다. 클럭으로 부터 수신된 타이밍 신호를 적분펄스넓이 변조기에 전송되며 선으로 펄스 넓이 변조 신호는 시프트 레지스터에 전송되고 클럭과 연결된다.Current input devices, such as air core transformers, are connected to the meter circuit. The timing signal received from the clock is sent to the integral pulse width modulator. In addition, the pulse width modulated signal is transmitted to the shift register and connected to the clock.
시프트 레지스터로부터 아나로그 증배기까지 출력이 되는 펄스 넓이 변조 신호의 디지털 표시는 변조기 및 변류기 또한 분류기에 의해 펄스 넓이 변조신호출력에 관해 회로에서 전력량계 전류주기의 1/4에 상응하는 양에 의해 지연된다.The digital representation of the pulse width modulated signal output from the shift register to the analog multiplier is delayed by an amount corresponding to one-quarter of the meter's current period in the circuit with respect to the pulse width modulated signal output by the modulator, current transformer and classifier. .
지연 펄스널이 변조신호는 전압 입력장치로부터 아나로그 증배기에 전송된다. 계기용 변압기 특성은 특정소자와 전력량계 회로에 기능적으로 관계된다. 아날로그 증배기의 출력은 전력량계의 전압과 시프트 레지스터로부터 수신된 위상 변이 전류의 곱으로 나타내는 전압신호는 직력 펄스 주파수를 제공하는 전압 주파수 변환 기에 대한 입력이다. 리세트 펄스는 적분기를 리세트 하기 위한 고정 전하를 제공하도록 전압-주파수 변환기에 대해 제공된다.The delay pulse channel modulated signal is transmitted from the voltage input device to the analog multiplier. Instrument transformer characteristics are functionally related to the specific device and meter circuit. The output of the analog multiplier is the product of the voltage of the meter and the phase shift current received from the shift register. The voltage signal is the input to the voltage frequency converter providing the linear pulse frequency. A reset pulse is provided for the voltage-frequency converter to provide a fixed charge to reset the integrator.
수용의 특정한 전력 요금주기 동안에 소모된 전력량에 대해 기존에 전력량계는 각상(R,S,T)의 전류만 검출 하였으며 과거에는 아나로그 장비가 주력으로 사용되어 고조파 및 상 불 평형으로 인한 중성선에 다소의 영향을 끼쳤으나 현대 대부분의 장비는 산업의 발전으로 인하여 디지탈화 되어 각상(R,S,T)의 전력량을 부정확하게 점검하여 각 수용가에게 전력 요금을 부과 하는 폐해가 있었다. 본 고안에 따르면 N상 전력 및 고조파 전류 검출회로로 구성 되어 있으며, 기존에는 각상(R,S,T)에 검출된 소비전력 만을 측정 하여 수용가에게 요금을 부과 하였으나 본 고안으로 중성선(N상)의 소비전력과 중성선(N상)의 고조파 전류도 측정하여 기존 요금체계의 검출부에 전력요금을 합산하여 수용가 에게 보다 정확하게 전력 요금을 부과 할 수 있는 적산 전력량계 장치 이다.For the amount of power consumed during a particular power bill period of acceptance, the electricity meter previously detected only the current of each phase (R, S, T), and in the past, analog equipment was used as the main power, and some of the neutral lines were caused by harmonics and phase imbalance. Although most of the modern equipment has been digitalized due to the development of the industry, there has been a problem of improperly checking the power amount of each phase (R, S, T) and charging each customer a power fee. According to the present invention, it consists of N-phase power and harmonic current detection circuit, and in the past, only the power consumption detected in each phase (R, S, T) was measured and charged to the customer. It is an integrated watt-hour meter that can measure the power consumption and the harmonic current of the neutral line (N phase), and add the power rate to the detection part of the existing tariff system to impose more accurate power rates on the customers.
보다 정확하게는 기존의 적산 전력량계는 각상(R,S,T)의 전력사용량 만을 검침 되었으나 추가로 중성선(N상)의 전력량 및 고조파전류를 합산하는 적산 전력량계 장치 이다.More precisely, the existing integrated energy meter is only the power consumption of each phase (R, S, T), but it is an integrated energy meter device that adds the power amount and harmonic current of the neutral line (N phase).
도 1은 종래의 소비전력을 측정하기 위한 전력량계를 도시한 사시도1 is a perspective view showing a power meter for measuring the conventional power consumption
도 2는 본 고안에 따른 N상 전력 고조파 검출형 적산 전력량계 사시도Figure 2 is a perspective view of the N-phase power harmonic detection-type integrated power meter according to the present invention
< 도면의 주요부분에 대한 부호의 설명 ><Explanation of symbols for the main parts of the drawings>
A. 전력량 승산부A. Power multiplier
B. 디지털 처리부B. Digital Processing
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WO2013047940A1 (en) * | 2011-09-26 | 2013-04-04 | 한국전력공사 | Electronic power meter for detecting an n phase current based on waveform superposition of a three phase input current, and n phase current detecting method using same |
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WO2013047940A1 (en) * | 2011-09-26 | 2013-04-04 | 한국전력공사 | Electronic power meter for detecting an n phase current based on waveform superposition of a three phase input current, and n phase current detecting method using same |
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