JP2002174648A - Watt-hour meter - Google Patents
Watt-hour meterInfo
- Publication number
- JP2002174648A JP2002174648A JP2000374592A JP2000374592A JP2002174648A JP 2002174648 A JP2002174648 A JP 2002174648A JP 2000374592 A JP2000374592 A JP 2000374592A JP 2000374592 A JP2000374592 A JP 2000374592A JP 2002174648 A JP2002174648 A JP 2002174648A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- power
- unit
- measurement
- hour meter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Measurement Of Current Or Voltage (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、交流電路の電圧と
電流から電力量を計量する電力量計に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a watt hour meter for measuring an amount of power from the voltage and current of an AC circuit.
【0002】[0002]
【従来の技術】図6は従来の電力量計の構成を示すブロ
ック図であり、1は被計測電路の交流電路、2は変流
器、3は負荷、6は従来の電力量計である。この従来の
電力量計6は、交流電路1の電圧を取込み計測する電圧
計測部41と、交流電路1の電流を変流器2を介して取
込み計測する電流計測部42と、電圧計測部41および
電流計測部42の計測値を入力して電力量を求める電力
量計量部43と、電圧計測部41および電流計測部42
の計測値を入力して電力を求める電力計測部44とで構
成されている。2. Description of the Related Art FIG. 6 is a block diagram showing the configuration of a conventional watt-hour meter. Reference numeral 1 denotes an AC circuit of an electric circuit to be measured, 2 denotes a current transformer, 3 denotes a load, and 6 denotes a conventional watt-hour meter. . The conventional watt-hour meter 6 includes a voltage measurement unit 41 that captures and measures the voltage of the AC circuit 1, a current measurement unit 42 that captures and measures the current of the AC circuit 1 via the current transformer 2, and a voltage measurement unit 41. And a power amount measuring unit 43 for inputting a measurement value of the current measuring unit 42 to obtain a power amount, a voltage measuring unit 41 and a current measuring unit 42.
And a power measuring unit 44 for inputting the measured values of the above and calculating the power.
【0003】[0003]
【発明が解決しようとする課題】上記の従来の構成で
は、電力量計量部43で電力量の計量、電圧計測部41
で電圧の計測、電力計測部44で電力の計測が行われる
が、電力量の削減に当たり、電圧との関係など有用な情
報が得られなかった。In the above-mentioned conventional configuration, the electric power metering unit 43 measures the electric energy and the voltage measuring unit 41
, The power is measured by the power measuring unit 44, but no useful information such as the relationship with the voltage was obtained in reducing the amount of power.
【0004】そこで本発明の目的は、電力量を削減する
上で有用な情報を得ることができる電力量計を提供する
ことである。さらに、電路の電圧と電力の関係を明確に
把握することのできる電力量計を提供することであり、
さらには電圧改善による電力量の削減効果をも分かる電
力量計を提供することである。An object of the present invention is to provide a watt hour meter capable of obtaining useful information for reducing the amount of power. Furthermore, it is to provide a watt hour meter that can clearly grasp the relationship between the voltage of the electric circuit and the electric power,
It is still another object of the present invention to provide a watt hour meter that also shows the effect of reducing the amount of power due to voltage improvement.
【0005】[0005]
【課題を解決するための手段】本発明の請求項1記載の
電力量計は、電路の電圧を連続的に計測する電圧計測部
と、電路の電流を連続的に計測する電流計測部と、電圧
計測部による電圧計測値および電流計測部による電流計
測値に基づいて電力量を計量する電力量計量部とを備え
た電力量計であって、電圧計測部の計測電圧の範囲を複
数に分割して電圧区分とし、電圧計測部により連続的に
計測される電圧計測値を入力し、入力される電圧計測値
の各電圧区分に対する発生頻度を算出する電圧区分毎発
生頻度カウント部を設けたことを特徴とする。According to a first aspect of the present invention, there is provided a watt-hour meter comprising: a voltage measuring unit for continuously measuring a voltage of an electric circuit; a current measuring unit for continuously measuring a current of the electric circuit; A watt hour meter that measures an amount of power based on the voltage measured by the voltage measuring unit and the current measured by the current measuring unit, and divides the range of the measured voltage of the voltage measuring unit into a plurality. And a voltage section for each voltage section for inputting a voltage measurement value continuously measured by the voltage measurement section and calculating a frequency of occurrence of the input voltage measurement value for each voltage section. It is characterized by.
【0006】本発明の請求項2記載の電力量計は、電路
の電圧を連続的に計測する電圧計測部と、電路の電流を
連続的に計測する電流計測部と、電圧計測部による電圧
計測値および電流計測部による電流計測値に基づいて電
力量を計量する電力量計量部とを備えた電力量計であっ
て、電圧計測部の計測電圧の範囲を複数に分割して電圧
区分とし、電圧計測部により連続的に計測される電圧計
測値を入力し、入力される電圧計測値の中から電路に接
続された負荷の運転時のみの電圧計測値を抽出し、抽出
した電圧計測値の各電圧区分に対する発生頻度を算出す
る負荷時の電圧区分毎発生頻度カウント部を設けたこと
を特徴とする。According to a second aspect of the present invention, there is provided a watt-hour meter comprising: a voltage measuring unit for continuously measuring a voltage of an electric circuit; a current measuring unit for continuously measuring a current of the electric circuit; A watt hour meter comprising a power meter and a power meter based on the current value measured by the value and the current measuring unit, wherein the range of the measured voltage of the voltage measuring unit is divided into a plurality of voltage categories, A voltage measurement value continuously measured by the voltage measurement unit is input, and a voltage measurement value only when the load connected to the electric circuit is operated is extracted from the input voltage measurement values. It is characterized in that an occurrence frequency counting section for each voltage section at the time of load for calculating the occurrence frequency for each voltage section is provided.
【0007】本発明の請求項3記載の電力量計は、電路
の電圧を連続的に計測する電圧計測部と、電路の電流を
連続的に計測する電流計測部と、電圧計測部による電圧
計測値および電流計測部による電流計測値に基づいて電
力を計測する電力計測部と、電圧計測部による電圧計測
値および電流計測部による電流計測値に基づいて電力量
を計量する電力量計量部とを備えた電力量計であって、
同一時刻で計測される電圧計測部の電圧計測値と電力計
測部の電力計測値とから電圧と電力との関係を求める電
圧−電力特性算出部を設けたことを特徴とする。According to a third aspect of the present invention, there is provided a watt-hour meter comprising: a voltage measuring unit for continuously measuring a voltage of an electric circuit; a current measuring unit for continuously measuring a current of the electric circuit; A power measurement unit that measures power based on the current measurement value by the value and current measurement unit, and a power amount measurement unit that measures the power amount based on the voltage measurement value by the voltage measurement unit and the current measurement value by the current measurement unit. A watt-hour meter with
A voltage-power characteristic calculation unit is provided for obtaining a relationship between voltage and power from a voltage measurement value of the voltage measurement unit measured at the same time and a power measurement value of the power measurement unit.
【0008】本発明の請求項4記載の電力量計は、請求
項3記載の電力量計において、同一時刻で計測される電
圧計測部の電圧計測値と電力計測部の電力計測値とに対
応する電圧−電力特性算出部で求めた電圧と電力との関
係を用いて特定電圧としたときの電力を算出し、この算
出値を用いて所定期間内における特定電圧としたときの
電力量を算出する電力量シミュレーション部を設けたこ
とを特徴とする。According to a fourth aspect of the present invention, in the watt hour meter according to the third aspect, the watt hour meter corresponds to the voltage measurement value of the voltage measurement unit and the power measurement value of the power measurement unit measured at the same time. The power at the specific voltage is calculated using the relationship between the voltage and the power obtained by the voltage-power characteristic calculation unit, and the power amount at the specific voltage within a predetermined period is calculated using the calculated value. A power amount simulation unit is provided.
【0009】本発明の請求項5記載の電力量計は、請求
項4記載の電力量計において、電力量計量部で算出した
所定期間内における電力量と、電力量シミュレーション
部で算出した所定期間内における特定電圧としたときの
電力量との差を求める電力量削減算出部を設けたことを
特徴とする。According to a fifth aspect of the present invention, there is provided the watt-hour meter according to the fourth aspect, wherein the watt-hour within the predetermined period calculated by the watt-hour meter and the predetermined period calculated by the watt-hour simulation unit are used. And a power reduction calculator for calculating a difference between the power and the power when a specific voltage is set.
【0010】本発明の請求項6記載の電力量計は、請求
項3記載の電力量計において、電圧−電力特性算出部で
求めた電圧と電力との関係から最大効率となる最適電圧
を求める最適電圧算出部と、電圧−電力特性算出部で求
めた電圧と電力との関係を用いて最適電圧算出部で求め
た最適電圧としたときの電力を算出し、この算出値を用
いて所定期間内における最適電圧としたときの電力量を
算出する電力量シミュレーション部とを設けたことを特
徴とする。According to a sixth aspect of the present invention, in the watt-hour meter according to the third aspect, an optimum voltage having a maximum efficiency is obtained from a relationship between the voltage and the power obtained by the voltage-power characteristic calculation unit. Calculates the power when the optimum voltage is calculated by the optimum voltage calculator using the relationship between the voltage and the power calculated by the optimal voltage calculator and the voltage-power characteristic calculator, and uses the calculated value for a predetermined period. And a power amount simulation unit for calculating a power amount when the voltage is the optimum voltage.
【0011】[0011]
【発明の実施の形態】本発明の請求項1記載の電力量計
は、電圧計測部の計測電圧の範囲を複数に分割して電圧
区分とし、電圧計測部により連続的に計測される電圧計
測値を入力し、入力される電圧計測値の各電圧区分に対
する発生頻度を算出する電圧区分毎発生頻度カウント部
を設けたことを特徴とする。この電圧区分毎発生頻度カ
ウント部により電路の電圧変動特性を知ることができる
ため、電力量計量部による電力量に対して電路電圧の分
析ができ、電力量を削減する上で有用な情報を得ること
ができるという作用を有する。The watt hour meter according to the first aspect of the present invention divides the range of the voltage measured by the voltage measuring unit into a plurality of voltage divisions and continuously measures the voltage by the voltage measuring unit. It is characterized in that an occurrence frequency counting unit for each voltage section for inputting a value and calculating the occurrence frequency of the input voltage measurement value for each voltage section is provided. Since the voltage variation characteristics of the electric circuit can be known by the occurrence frequency counting unit for each voltage section, the electric circuit voltage can be analyzed with respect to the electric energy by the electric energy measuring unit, and useful information for reducing the electric energy can be obtained. It has the effect of being able to.
【0012】本発明の請求項2記載の電力量計は、電圧
計測部の計測電圧の範囲を複数に分割して電圧区分と
し、電圧計測部により連続的に計測される電圧計測値を
入力し、入力される電圧計測値の中から電路に接続され
た負荷の運転時のみの電圧計測値を抽出し、抽出した電
圧計測値の各電圧区分に対する発生頻度を算出する負荷
時の電圧区分毎発生頻度カウント部を設けたことを特徴
とする。この負荷時の電圧区分毎発生頻度カウント部に
より負荷運転時の電路の電圧変動特性を知ることができ
るため、負荷運転時における電力量計量部による電力量
に対して電路電圧の分析ができ、電力量を削減する上で
有用な情報を得ることができるという作用を有する。According to a second aspect of the present invention, in the watt hour meter, the range of the voltage measured by the voltage measuring unit is divided into a plurality of voltage divisions, and a voltage measurement value continuously measured by the voltage measuring unit is inputted. , Extracts voltage measurement values only during operation of the load connected to the electric circuit from the input voltage measurement values, and calculates the frequency of occurrence of the extracted voltage measurement values for each voltage division. A frequency counting unit is provided. Since the voltage variation characteristics of the electric circuit during the load operation can be known by the occurrence frequency counting unit for each voltage division at the time of the load, the electric circuit voltage can be analyzed with respect to the electric energy by the electric energy meter during the load operation, and the electric power can be analyzed. This has the effect that useful information for reducing the amount can be obtained.
【0013】本発明の請求項3記載の電力量計は、同一
時刻で計測される電圧計測部の電圧計測値と電力計測部
の電力計測値とから電圧と電力との関係を求める電圧−
電力特性算出部を設けたことを特徴とする。この電圧−
電力特性算出部を設けたことにより、特別に電路の電圧
を変えることなく、電力量を削減する上で有用な情報で
ある電圧と電力の関係を得ることができるという作用を
有する。According to a third aspect of the present invention, there is provided a watt-hour meter which calculates a voltage-power relationship from a voltage measurement value of a voltage measurement unit measured at the same time and a power measurement value of a power measurement unit.
A power characteristic calculation unit is provided. This voltage-
The provision of the power characteristic calculation unit has an effect that a relationship between voltage and power, which is useful information for reducing the amount of power, can be obtained without particularly changing the voltage of the electric circuit.
【0014】本発明の請求項4記載の電力量計は、請求
項3記載の電力量計において、同一時刻で計測される電
圧計測部の電圧計測値と電力計測部の電力計測値とに対
応する電圧−電力特性算出部で求めた電圧と電力との関
係を用いて特定電圧としたときの電力を算出し、この算
出値を用いて所定期間内における特定電圧としたときの
電力量を算出する電力量シミュレーション部を設けたこ
とを特徴とする。この電力量シミュレーション部により
電路の電圧を特定電圧に改善したときの電力量をシミュ
レーションにて容易に知ることができるという作用を有
する。According to a fourth aspect of the present invention, in the watt-hour meter according to the third aspect, the watt-hour meter corresponds to the voltage measurement value of the voltage measurement unit and the power measurement value of the power measurement unit measured at the same time. The power at the specific voltage is calculated using the relationship between the voltage and the power obtained by the voltage-power characteristic calculation unit, and the power amount at the specific voltage within a predetermined period is calculated using the calculated value. A power amount simulation unit is provided. The power amount simulation unit has an effect that the power amount when the voltage of the electric circuit is improved to the specific voltage can be easily known by the simulation.
【0015】本発明の請求項5記載の電力量計は、請求
項4記載の電力量計において、電力量計量部で算出した
所定期間内における電力量と、電力量シミュレーション
部で算出した所定期間内における特定電圧としたときの
電力量との差を求める電力量削減算出部を設けたことを
特徴とする。この電力量削減算出部により電路の電圧を
特定電圧に変更した場合の電力量削減効果を容易に知る
ことができるという作用を有する。According to a fifth aspect of the present invention, there is provided the watt-hour meter according to the fourth aspect, wherein the watt-hour within the predetermined period calculated by the watt-hour meter and the predetermined period calculated by the watt-hour simulation unit are used. And a power reduction calculator for calculating a difference between the power and the power when a specific voltage is set. This power amount reduction calculator has an effect that the power amount reduction effect when the voltage of the electric circuit is changed to the specific voltage can be easily known.
【0016】本発明の請求項6記載の電力量計は、請求
項3記載の電力量計において、電圧−電力特性算出部で
求めた電圧と電力との関係から最大効率となる最適電圧
を求める最適電圧算出部と、電圧−電力特性算出部で求
めた電圧と電力との関係を用いて最適電圧算出部で求め
た最適電圧としたときの電力を算出し、この算出値を用
いて所定期間内における最適電圧としたときの電力量を
算出する電力量シミュレーション部とを設けたことを特
徴とする。このように最適電圧算出部と電力量シミュレ
ーション部を設けたことにより、電路の電圧を最適電圧
に改善したときの電力量をシミュレーションにて容易に
知ることができるという作用を有する。According to a sixth aspect of the present invention, in the watt-hour meter according to the third aspect, an optimum voltage having a maximum efficiency is obtained from the relationship between the voltage and the power obtained by the voltage-power characteristic calculation section. Calculates the power when the optimum voltage is calculated by the optimum voltage calculator using the relationship between the voltage and the power calculated by the optimal voltage calculator and the voltage-power characteristic calculator, and uses the calculated value for a predetermined period. And a power amount simulation unit for calculating a power amount when the voltage is the optimum voltage. The provision of the optimum voltage calculation unit and the power amount simulation unit has an effect that the power amount when the voltage of the electric circuit is improved to the optimum voltage can be easily known by the simulation.
【0017】以下本発明の実施の形態について、図1か
ら図5を用いて説明する。An embodiment of the present invention will be described below with reference to FIGS.
【0018】(第1の実施の形態)図1は本発明の第1
の実施の形態の電力量計を示すブロック図である。1は
被計測回路の交流電路、2は交流電路1の電流を検出す
るための変流器、3は負荷、4は本実施の形態の電力量
計である。(First Embodiment) FIG. 1 shows a first embodiment of the present invention.
FIG. 3 is a block diagram showing a watt hour meter according to the embodiment. 1 is an AC circuit of a circuit to be measured, 2 is a current transformer for detecting a current of the AC circuit 1, 3 is a load, and 4 is a watt hour meter of the present embodiment.
【0019】本実施の形態の電力量計4は、交流電路1
の電圧を取込み連続的に計測する電圧計測部41と、交
流電路1の電流を変流器2を介して取込み連続的に計測
する電流計測部42と、電圧計測部41および電流計測
部42の計測値に基づいて電力量を求める電力量計量部
43と、電圧計測部41および電流計測部42の計測値
を入力して電力を求める電力計測部44とを備えてい
る。そしてさらに、電圧区分毎発生頻度カウント部45
と、負荷時の電圧区分毎発生頻度カウント部46と、電
圧−電力特性算出部47と、特定電圧における電力量シ
ミュレーション部48と、電力量削減算出部49とを備
えている。ここでは、電圧計測部41は入力される電圧
波形を一定時間毎にサンプリングし、サンプリング値を
出力するものとする。電流計測部42は入力される電圧
波形を一定時間毎にサンプリングし、サンプリング値を
出力するものとする。The watt hour meter 4 of the present embodiment comprises an AC power line 1
A voltage measuring unit 41 for continuously taking in the voltage of the AC circuit 1, a current measuring unit 42 for continuously taking in the current of the AC circuit 1 via the current transformer 2, and a voltage measuring unit 41 and a current measuring unit 42. An electric energy meter 43 for obtaining electric energy based on the measured value, and an electric power measuring unit 44 for inputting the measured values of the voltage measuring unit 41 and the current measuring unit 42 to obtain electric power are provided. Further, the occurrence frequency counting unit 45 for each voltage section
A load-frequency-specific-occurrence-frequency counting unit 46, a voltage-power characteristic calculation unit 47, a power amount simulation unit 48 at a specific voltage, and a power amount reduction calculation unit 49. Here, it is assumed that the voltage measurement unit 41 samples the input voltage waveform at regular intervals and outputs a sampled value. The current measurement unit 42 samples the input voltage waveform at regular intervals and outputs a sampled value.
【0020】電圧区分毎発生頻度カウント部45は、電
圧計測部41の計測電圧の範囲を適当な間隔で複数に細
分化区分して複数の電圧区分とし、電圧計測部41から
入力される電圧計測値(サンプリング値)がどの電圧区
分かを判断し、電圧区分毎に各々に含まれる電圧計測値
(サンプリング値)の個数をカウントすることによっ
て、連続的に計測される電圧計測値の各電圧区分に対す
る発生頻度を算出するものであり、図2のような電圧区
分−頻度特性を求めるものである。この電圧区分毎発生
頻度カウント部45は、負荷時(負荷3の運転時),無
負荷時(負荷3の非運転時)にかかわらず、カウント動
作している。The frequency counting unit 45 for each voltage division divides the range of the voltage measured by the voltage measurement unit 41 into a plurality of voltage divisions at appropriate intervals to form a plurality of voltage divisions. By judging which voltage division the value (sampling value) is, and counting the number of voltage measurement values (sampling value) included in each voltage division, each voltage division of the continuously measured voltage measurement value Is calculated, and a voltage division-frequency characteristic as shown in FIG. 2 is obtained. The occurrence frequency counting unit 45 for each voltage section performs a counting operation regardless of whether the load is applied (when the load 3 is operated) or not (when the load 3 is not operated).
【0021】負荷時の電圧区分毎発生頻度カウント部4
6は、電圧計測部41の計測電圧の範囲を適当な間隔で
複数に細分化区分して複数の電圧区分とし、電圧計測部
41から入力される電圧計測値(サンプリング値)の中
から負荷時(負荷3の運転時)のみの電圧計測値を抽出
し、抽出した電圧計測値(サンプリング値)がどの電圧
区分かを判断し、電圧区分毎に各々に含まれる電圧計測
値の個数をカウントすることによって、連続的に計測さ
れる電圧計測値の各電圧区分に対する発生頻度を算出す
るものであり、負荷時における図2のような電圧区分−
頻度特性を求めるものである。なお、負荷時の電圧区分
毎発生頻度カウント部46は、電流計測部42または電
力計測部44の計測値を入力し(図示せず)、電流計測
部42または電力計測部44の計測値が零のときは無負
荷時、零でないときは負荷時と判断している。A frequency counting unit 4 for each voltage division under load
Reference numeral 6 denotes a plurality of voltage divisions obtained by subdividing the range of the voltage measured by the voltage measurement unit 41 into a plurality of voltage divisions at appropriate intervals, and selecting a voltage measurement value (sampling value) input from the voltage measurement unit 41 during load. Only during the operation of the load 3 is the voltage measurement value extracted, the voltage measurement value (sampling value) extracted is determined to which voltage division, and the number of voltage measurement values included in each voltage division is counted. In this way, the frequency of occurrence of continuously measured voltage measurement values for each voltage section is calculated.
The frequency characteristic is obtained. The frequency counting unit 46 for each voltage division at the time of load inputs the measurement value of the current measurement unit 42 or the power measurement unit 44 (not shown), and the measurement value of the current measurement unit 42 or the power measurement unit 44 becomes zero. In the case of, it is determined that there is no load, and when it is not zero, it is determined that there is load.
【0022】電圧−電力特性算出部47は、電圧計測部
41の電圧計測値と、瞬時電力を連続的に計測する電力
計測部44の電力計測値とを入力とし、電路電圧が変動
した時の電力を求めることによって或る期間内の変動電
圧範囲について電圧と電力との複数の関係特性つまり図
3のような複数の電圧−電力特性を示す関数y1 =f 1
(x),y2 =f2 (x)やy3 =f3 (x)(y1 ,
y2 ,y3 はそれぞれ負荷が異なる負荷A,B,Cのと
きの電力、xは電圧)や特性曲線を求めるようにしたも
のである。これらの関数や特性曲線は、或る期間内の電
圧と電力を、一つの平面上にプロットしたものから、隣
接したデータと変動の傾向から隣接データを結び近似的
に作成したものであり、負荷変動に対応した電圧−電力
特性曲線を求めたものである。またここで、電圧−電力
特性曲線を求めるためには、できるだけ多くのデータを
求める期間を要し、その後の計測のなかで活用できると
いう手順を要する。The voltage-power characteristic calculation unit 47 includes a voltage measurement unit
41 measured voltage and electric power for continuous measurement of instantaneous electric power
With the power measured value of the measuring unit 44 as input, the circuit voltage fluctuates
By calculating the power at the time of
Multiple characteristics of voltage and power for pressure range
A function y indicating a plurality of voltage-power characteristics such as1= F 1
(X), yTwo= FTwo(X) or yThree= FThree(X) (y1,
yTwo, YThreeAre different loads A, B, and C, respectively.
Power, x is voltage) and characteristic curve
It is. These functions and characteristic curves are
From the plot of pressure and power on one plane,
Approximate by connecting adjacent data from the data in contact and the tendency of fluctuation
Voltage-power corresponding to load fluctuation
A characteristic curve is obtained. Also, here, voltage-power
To obtain the characteristic curve, as much data as possible
It takes the required period and can be used in subsequent measurements
Requires the following procedure.
【0023】そして、特定電圧における電力量シミュレ
ーション部48は、電圧−電力特性算出部47と電力計
測部44と電圧計測部41との出力を入力とし、電力計
測部44で計測した瞬時電力と、電圧計測部41で計測
した瞬時電圧と、電圧−電力特性算出部47の複数の関
数y1 =f1 (x),y2 =f2 (x),y3 =f
3(x)とを用いて、特定電圧における電圧補正された
電力を求め、これを連続的に行うことで特定電圧におけ
る所定期間の電力量をシミュレーションにて求めるよう
にしたものである。なお、特定電圧における電力量シミ
ュレーション部48には、任意な電圧を特定電圧として
設定するための特定電圧設定部を有している。The power amount simulation unit 48 at a specific voltage receives the outputs of the voltage-power characteristic calculation unit 47, the power measurement unit 44, and the voltage measurement unit 41 as inputs, and outputs the instantaneous power measured by the power measurement unit 44; The instantaneous voltage measured by the voltage measurement unit 41 and a plurality of functions y 1 = f 1 (x), y 2 = f 2 (x), y 3 = f of the voltage-power characteristic calculation unit 47
3 (x), the voltage-corrected power at the specific voltage is obtained, and by continuously performing the power, the power amount of the specific voltage for a predetermined period is obtained by simulation. Note that the power amount simulation section 48 at a specific voltage has a specific voltage setting section for setting an arbitrary voltage as the specific voltage.
【0024】電力量削減算出部49は、電力量計量部4
3で算出した所定期間内における電力量と、特定電圧に
おける電力量シミュレーション部48で算出した同所定
期間内における特定電圧としたときの電力量との差を求
めるものである。The power amount reduction calculation unit 49 includes the power amount measurement unit 4
The difference between the power amount within the predetermined period calculated in step 3 and the power amount at the specific voltage within the predetermined period calculated by the power amount simulation unit 48 at the specific voltage is calculated.
【0025】なお、ここでは、電圧計測部41および電
流計測部42は、サンプリング値を出力するものとした
が、アナログ的に電圧あるいは電流を計測し出力するよ
うにした場合は、それらの出力値を入力する電力量計量
部43、電力計測部44、電圧区分毎発生頻度カウント
部45、負荷時の電圧区分毎発生頻度カウント部46、
電圧−電力特性算出部47および電力量シミュレーショ
ン部48において、それらの入力値をまず、一定時間毎
にサンプリングするようにすればよい。In this case, the voltage measuring section 41 and the current measuring section 42 output the sampling values. However, if the voltage or current is measured and output in an analog manner, the output values are output. , A power amount measuring unit 43, a power measuring unit 44, an occurrence frequency counting unit 45 for each voltage division, an occurrence frequency counting unit 46 for each voltage division under load,
In the voltage-power characteristic calculation unit 47 and the power amount simulation unit 48, their input values may be sampled at regular intervals.
【0026】以下、さらに詳しく説明する。例えば、図
3で、負荷Aのとき、電力量シミュレーション部48内
の特定電圧設定部でVs を特定電圧に設定すると、Ws1
は特定電圧Vs における電力であり、これに対してVa
はある時刻における計測電圧で、Wa1は計測電圧Va を
計測時点における計測電力であり、特定電圧Vs におけ
る電圧補正された電力は、この例ではWa1がWs1とな
る。The details will be described below. For example, in FIG. 3, when the load A is set and the specific voltage setting unit in the electric energy simulation unit 48 sets V s to a specific voltage, W s1
Is the power at a particular voltage V s , whereas V a
In measuring the voltage at a certain time is, W a1 is the measured power at the time measures the measurement voltage V a, the voltage corrected power at a particular voltage V s, W a1 is W s1 in this example.
【0027】電力量シミュレーション部48において電
力量を算出するのに以下の2つの方法がある。There are the following two methods for calculating the electric energy in the electric energy simulation unit 48.
【0028】まず、第1の方法について、図4(a)を
用いて説明する。電圧計測部41で瞬時電圧の計測、電
流計測部42で瞬時電流の計測、電力計測部44で瞬時
電力の計測、電力量計量部43で電力量の計量がなされ
るが、時刻t0 〜t1 間において、電圧−電力特性算出
部47では瞬時電圧と瞬時電力が計測される都度、その
値を電圧−電力テーブル上に記憶する。First, the first method will be described with reference to FIG. Measurement of the instantaneous voltage at the voltage measuring unit 41, measures the instantaneous current in the current measurement unit 42, measurement of the instantaneous power by the power measuring unit 44, but the metering of electric energy in the electric energy measuring section 43 is made, the time t 0 ~t During one time, each time the instantaneous voltage and instantaneous power are measured by the voltage-power characteristic calculation unit 47, the values are stored in a voltage-power table.
【0029】そして、時刻t1 〜t2 間において、電圧
−電力特性算出部47は電圧−電力特性曲線(あるいは
関数)を求める。Then, between the times t 1 and t 2 , the voltage-power characteristic calculating section 47 obtains a voltage-power characteristic curve (or function).
【0030】次に、時刻t2 〜t3 間において、電力量
シミュレーション部48は時刻t2〜t3 間を所定期間
として、瞬時電圧および瞬時電力が計測される都度、電
圧−電力特性曲線を参照しながら特定電圧における電圧
補正された電力を求め、これを連続的に行うことで、特
定電圧としたときの時刻t2 〜t3 間の電力量(kWH
2とする)を求める。なお、特定電圧は、電力量シミュ
レーション部48において時刻t2 の時点で設定した値
となる。Next, from time t 2 to time t 3 , the power amount simulation section 48 sets the voltage-power characteristic curve every time the instantaneous voltage and the instantaneous power are measured, with the time t 2 to t 3 being a predetermined period. with reference seek power whose voltage has been corrected at a particular voltage, by doing this continuously, the amount of power between the time t 2 ~t 3 of when the specific voltage (kWH
2). Incidentally, the specific voltage is a value set at time t 2 in the amount of power simulation unit 48.
【0031】この第1の方法では、電力量削減算出部4
9で求める値は、時刻t2 〜t3 間に電力量計量部43
により計量された電力量をkWH1とすると、kWH1
−kWH2となる。In the first method, the power reduction calculator 4
9 values for determining the time t 2 watt measuring section 43 between ~t 3
Let kWH1 be the amount of power measured by kWH1
−kWH2.
【0032】次に、第2の方法について、図4(b)を
用いて説明する。同様に電圧計測部41で瞬時電圧の計
測、電流計測部42で瞬時電流の計測、電力計測部44
で瞬時電力の計測、電力量計量部43で電力量の計量が
なされるが、時刻t0 〜t1間において、瞬時電圧と瞬
時電力を計測の都度、それらをペアデータにて連続的に
電力量シミュレーション部48に記憶するとともに、電
圧−電力特性算出部47では瞬時電圧と瞬時電力が計測
される都度、その値を電圧−電力テーブル上に記憶す
る。Next, the second method will be described with reference to FIG. Similarly, the voltage measurement unit 41 measures the instantaneous voltage, the current measurement unit 42 measures the instantaneous current, and the power measurement unit 44
In measuring instantaneous power, but weighed amount of power in the electric energy measuring section 43 is made, between the time t 0 ~t 1, each time the instantaneous voltage and instantaneous power measurement, continuously power them at paired data Each time the instantaneous voltage and the instantaneous power are measured, the values are stored in the voltage-power table in the voltage-power characteristic calculating section 47.
【0033】そして、時刻t1 〜t2 間において、電圧
−電力特性算出部47は電圧−電力特性曲線(あるいは
関数)を求める。Then, between the times t 1 and t 2 , the voltage-power characteristic calculating section 47 obtains a voltage-power characteristic curve (or function).
【0034】次に、時刻t2 〜t4 間において、電力量
シミュレーション部48は、時刻t 0 〜t1 間を所定期
間として、連続的に記憶されたペアデータを基に、電圧
−電力特性曲線を参照しながら特定電圧における電圧補
正された電力を求め、これを連続的に行うことで、特定
電圧としたときの時刻t1 〜t2 間の電力量(kWH3
とする)を求める。Next, at time tTwo~ TFourBetween the electricity
The simulation unit 48 calculates the time t 0~ T1Predetermined period
As the interval, based on the pair data stored continuously, the voltage
− Voltage compensation at a specific voltage with reference to the power characteristic curve
Find corrected power and perform this continuously to identify
Time t as voltage1~ TTwo(KWH3)
).
【0035】この第2の方法では、電力量削減算出部4
9で求める値は、時刻t0 〜t1 間に電力量計量部43
により計量された電力量をkWH0とすると、kWH0
−kWH3となる。すなわち、第2の方法では、計測後
にペアデータをもとにシミュレーションするため、特定
電圧を、変更して何回でもシミュレーションできるが、
第1の方法よりも大きなメモリ容量が必要となる。In the second method, the electric energy reduction calculator 4
The value obtained in step 9 is determined by the electric energy meter 43 between the times t 0 and t 1.
Let kWH0 be the power amount measured by kWH0.
−kWH3. That is, in the second method, since the simulation is performed based on the pair data after the measurement, the specific voltage can be changed and the simulation can be performed any number of times.
A larger memory capacity is required than in the first method.
【0036】以上の構成について以下にその各部の働き
及び作用について詳細に説明する。一般に交流電路には
複数の各種負荷が接続されており、そのため負荷の運転
状況によってその系統の電源電圧は末端に行くほど変動
が大きくなる。一方、電力量は、同じ負荷であっても当
然ながら電路電圧によって変わることがわかっており、
省電力対策として電路電圧を最適電圧にすることが望ま
しいが、フリッカー等電路電圧の瞬時変動の実態が掴め
なくては最適電圧に改善することは困難であった。The function and operation of each part of the above configuration will be described in detail below. In general, a plurality of various loads are connected to the AC power line, and therefore, the power supply voltage of the system fluctuates more toward the end depending on the operation state of the load. On the other hand, it is known that the amount of power varies depending on the circuit voltage even with the same load.
It is desirable to make the circuit voltage the optimum voltage as a power saving measure. However, it has been difficult to improve the circuit voltage to the optimum voltage without grasping the actual state of the instantaneous fluctuation of the circuit voltage such as flicker.
【0037】これに対して本実施の形態では、電圧区分
毎発生頻度カウント部45を設け、電圧計測部42で計
測した電圧計測値の各電圧区分に対する発生頻度を算出
することにより、交流電路1の電圧変動特性を知ること
ができるため、電力量計量部43による電力量に対して
電路電圧の分析ができ、電力量を削減する上で有用な情
報を得ることができる。例えば、電圧変動特性の範囲が
狭く、且つその最大頻度電圧が、使用する負荷の定格値
より高いことが判明すれば、その電路の電圧を下げて使
用することが可能となり、その結果、一般的な負荷では
電圧を下げるほど負荷の消費電力が低くなることより電
力量の削減となる。尚ここで、負荷となる機器には使用
電圧範囲が規定されているため、その保証範囲で使用さ
れていることを知る必要があり、そのため電圧変動特性
が利用される。なお、電圧を下げる一つの方法としては
電路に電圧を供給する変圧器のタップ電圧を変えるのが
一般的である。On the other hand, in the present embodiment, the occurrence frequency counting section 45 for each voltage section is provided, and the frequency of occurrence of the voltage measurement value measured by the voltage measurement section 42 for each voltage section is calculated. Since the voltage fluctuation characteristics can be known, it is possible to analyze the electric circuit voltage with respect to the electric energy by the electric energy measuring unit 43, and to obtain useful information for reducing the electric energy. For example, if it is found that the range of the voltage fluctuation characteristic is narrow and the maximum frequency voltage is higher than the rated value of the load to be used, it is possible to reduce the voltage of the electric circuit and use it. In a simple load, the lower the voltage is, the lower the power consumption of the load is. Here, since the working voltage range is defined for the device serving as the load, it is necessary to know that the device is used within the guaranteed range. Therefore, the voltage fluctuation characteristic is used. As one method of lowering the voltage, it is common to change the tap voltage of a transformer that supplies a voltage to an electric circuit.
【0038】また、負荷時の電圧区分毎発生頻度カウン
ト部46を設け、負荷運転時における電圧計測部42で
計測した電圧計測値の各電圧区分に対する発生頻度を算
出することにより、交流電路1の負荷運転時の電圧変動
特性を知ることができるため、負荷運転時における電力
量計量部43による電力量に対して電路電圧の分析がで
き、電力量を削減する上で有用な情報を得ることができ
る。負荷時の電圧区分毎発生頻度カウント部46は負荷
運転時のみの電圧変動特性を知ることができるため、電
力量を削減するための情報として、電圧区分毎発生頻度
カウント部45よりも高精度な電路電圧の分析ができ
る。Further, an occurrence frequency counting section 46 for each voltage section at the time of load is provided, and the frequency of occurrence of the voltage measurement value measured by the voltage measurement section 42 at the time of load operation for each voltage section is calculated. Since the voltage fluctuation characteristics during the load operation can be known, the electric circuit voltage can be analyzed with respect to the electric energy by the electric energy metering unit 43 during the load operation, and useful information for reducing the electric energy can be obtained. it can. Since the voltage-frequency occurrence frequency counting section 46 at the time of load can know the voltage fluctuation characteristics only at the time of load operation, the voltage-frequency occurrence frequency counting section 46 has higher accuracy than the voltage-frequency occurrence frequency counting section 45 as information for reducing the amount of power. The circuit voltage can be analyzed.
【0039】したがって、電圧区分毎発生頻度カウント
部45と負荷時の電圧区分毎発生頻度カウント部46は
いずれか一方のみを設けてあっても、電力量を削減する
上で有用な情報を得ることができるが、負荷時の電圧区
分毎発生頻度カウント部46の方がより有用な情報とな
る。本実施の形態では、両方を設けているため、両方の
データを比較することにより以下の効果がある。電圧変
動の大きさは負荷運転時のものであれば、計測点以前と
計測点以後との両方の負荷の影響を受けたものであり、
一方、無負荷時の電圧変動は計測点以前の負荷だけの影
響によるものである。したがって、無負荷時の電圧変動
が小さく、負荷運転時の電圧変動が大きい場合は、その
負荷までの線路抵抗によって電圧変動していることが判
り、これより、負荷までの電線サイズを太く改善するこ
とで電圧変動を小さくでき、線路上の電力損失や電圧改
善による負荷特性が安定する効果を有する。Therefore, even if only one of the voltage division occurrence frequency counting section 45 and the load voltage division occurrence frequency counting section 46 is provided, it is possible to obtain useful information for reducing the amount of power. However, the occurrence frequency counting section 46 for each voltage division at the time of load provides more useful information. In the present embodiment, since both are provided, comparing the two data has the following effects. If the magnitude of the voltage fluctuation is during load operation, it is affected by both the load before and after the measurement point,
On the other hand, the voltage fluctuation at the time of no load is due to the influence of only the load before the measurement point. Therefore, when the voltage fluctuation at the time of no load is small and the voltage fluctuation at the time of the load operation is large, it is understood that the voltage fluctuates due to the line resistance to the load, and the size of the electric wire up to the load is improved. As a result, voltage fluctuation can be reduced, and there is an effect that load characteristics are stabilized by power loss and voltage improvement on the line.
【0040】次に負荷3が固定負荷である場合には、効
率のよい電路電圧を知りたいとしても、実際には電路電
圧を可変させて調査することは既設負荷になるほど電路
電圧を可変させる装置が設けていないのが一般的であ
り、非常に困難であった。Next, when the load 3 is a fixed load, even if it is desired to know an efficient circuit voltage, it is necessary to actually vary the circuit voltage and to investigate it. Is generally not provided, which is very difficult.
【0041】これに対して本実施の形態では、電圧−電
力特性算出部47を設け、それにより、電路電圧の変動
の都度、その時の電圧と電流を或る期間について調べ、
その電圧変動の範囲に対する電圧−電力特性を知ること
ができるため、特別に交流電路1の電圧を変えることな
く、電力量を計量しつつ、電力量を削減する上で有用な
情報(電圧−電力特性)を得ることができる。On the other hand, in the present embodiment, a voltage-power characteristic calculating section 47 is provided, whereby the voltage and current at that time are checked for a certain period every time the circuit voltage fluctuates.
Since it is possible to know the voltage-power characteristic with respect to the range of the voltage fluctuation, information (voltage-power) useful for reducing the power amount while measuring the power amount without changing the voltage of the AC circuit 1 in particular. Characteristics) can be obtained.
【0042】さらに、特定電圧における電力量シミュレ
ーション部48を設けることにより、電路電圧を特定電
圧に改善したときの電力量をシミュレーションにて容易
に知ることができる。但しこの場合、まず最初に或る期
間内の電圧−電力特性を求めた後、電力量をシミュレー
ションする手順とすることを要する。Further, by providing the power amount simulation section 48 at a specific voltage, the power amount when the circuit voltage is improved to the specific voltage can be easily known by simulation. However, in this case, it is necessary to first determine the voltage-power characteristics within a certain period and then simulate the power amount.
【0043】さらに、電力量削減算出部49を設け、電
力量計量部43で算出された所定期間内における電力量
と、特定電圧における電力量シミュレーション部48で
算出された所定期間内における特定電圧としたときの電
力量との差を求めることにより、特定電圧に改善するこ
とによる電力量の削減効果を容易に知ることができる。Further, a power amount reduction calculating unit 49 is provided, and the power amount within the predetermined period calculated by the power amount measuring unit 43 and the specific voltage within the predetermined period calculated by the power amount simulation unit 48 at the specific voltage are provided. By obtaining the difference from the power amount at the time of performing, it is possible to easily know the effect of reducing the power amount by improving to the specific voltage.
【0044】(第2の実施の形態)図5は本発明の第2
の実施の形態の電力量計の構成を示すブロック図で、5
は本実施の形態の電力量計である。図1と同一部分につ
いては同一符号を付し、説明を省略する。(Second Embodiment) FIG. 5 shows a second embodiment of the present invention.
FIG. 5 is a block diagram showing a configuration of the watt hour meter according to the embodiment.
Is a watt hour meter of the present embodiment. The same parts as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.
【0045】最適電圧算出部51は、電圧−電力特性算
出部47で求めた電圧−電力特性から最大効率である最
適電圧を求める。例えば図3において、V0 が運転効率
の最も高い電圧で、これを最適電圧とし、この電圧で運
転することで最小の消費電力となる。最適電圧における
電力量シミュレーション部52は、第1の実施の形態の
特定電圧における電力量シミュレーション部48と同様
に(特定電圧の代わりに最適電圧を用いる)、最適電圧
算出部51で求めた最適電圧における電力量をシミュレ
ーションによって求めるものである。この際、図4
(a),(b)で示された第1,第2のいずれの方法に
よる場合も、時刻t1 〜t2 間において、電圧−電力特
性算出部47は電圧−電力特性を求め、その特性から最
適電圧算出部51で最適電圧を抽出する。The optimum voltage calculating section 51 obtains the optimum voltage having the maximum efficiency from the voltage-power characteristics obtained by the voltage-power characteristic calculating section 47. For example, in FIG. 3, V 0 is a voltage having the highest operation efficiency, which is set as an optimum voltage, and operating at this voltage leads to a minimum power consumption. The power amount simulation unit 52 at the optimum voltage is the same as the power amount simulation unit 48 at the specific voltage in the first embodiment (using the optimum voltage instead of the specific voltage), and the optimum voltage calculated by the optimum voltage calculation unit 51 is used. Is obtained by simulation. At this time, FIG.
In any of the first and second methods shown in (a) and (b), the voltage-power characteristic calculator 47 obtains the voltage-power characteristic between the times t 1 and t 2 , and obtains the characteristic. The optimum voltage calculator 51 extracts the optimum voltage from the above.
【0046】本実施の形態によれば、交流電路1の電圧
を最大効率とした最適電圧の場合の電力量を求めること
ができる。これを、電力量計量部43で求めた実計量の
電力量と比較し、両者の差を求めることによって最適電
圧に改善することによる電力量の削減効果を知ることが
できる。すなわち、電力量削減算出部49で、電力量計
量部43で算出された所定期間内における電力量と、電
力量シミュレーション部52で算出された所定期間内に
おける最適電圧としたときの電力量との差を求めること
により、最適電圧に改善することによる電力量の削減効
果を容易に知ることができる。According to the present embodiment, it is possible to obtain the amount of power in the case of the optimum voltage with the voltage of the AC circuit 1 as the maximum efficiency. This is compared with the actually measured power amount obtained by the power amount measurement unit 43, and the difference between the two is obtained, so that the effect of reducing the power amount by improving to the optimum voltage can be known. That is, the power amount reduction calculation unit 49 calculates the power amount within the predetermined period calculated by the power amount measurement unit 43 and the power amount when the optimum voltage within the predetermined period calculated by the power amount simulation unit 52 is obtained. By obtaining the difference, the effect of reducing the amount of power by improving the voltage can be easily known.
【0047】なお、第1の実施の形態においても、電力
量シミュレーション部48内の特定電圧設定部で、特定
電圧として最適電圧(例えば図3のV0 )を設定するこ
とで、最適電圧に改善することによる電力量の削減効果
を容易に知ることができる。In the first embodiment, the optimum voltage (eg, V 0 in FIG. 3) is set as the specific voltage by the specific voltage setting section in the electric energy simulation section 48, thereby improving the optimum voltage. By doing so, the effect of reducing the amount of power can be easily known.
【0048】また、第1の実施の形態において、電圧−
電力特性算出部47の出力を入力し、電力量シミュレー
ション部48へ最適電圧を出力する最適電圧算出部51
を追加し、電力量シミュレーション部48において、そ
の内部の特定電圧設定部で設定する特定電圧と、最適電
圧算出部51で算出された最適電圧とを切り替えて使用
できる構成としてもよい。In the first embodiment, the voltage-
An optimum voltage calculator 51 that receives an output of the power characteristic calculator 47 and outputs an optimum voltage to the power amount simulator 48.
May be added so that the power amount simulation unit 48 can switch and use the specific voltage set by the internal specific voltage setting unit and the optimum voltage calculated by the optimum voltage calculation unit 51.
【0049】[0049]
【発明の効果】本発明の請求項1記載の電力量計によれ
ば、電圧区分毎発生頻度カウント部を設けたことによ
り、電路の電圧変動特性を知ることができるため、電力
量計量部による電力量に対して電路電圧の分析ができ、
電力量を削減する上で有用な情報を得ることができる。According to the watt hour meter according to the first aspect of the present invention, since the occurrence frequency counting section for each voltage section is provided, the voltage fluctuation characteristics of the electric circuit can be known. The circuit voltage can be analyzed for the electric energy,
Information that is useful in reducing the amount of power can be obtained.
【0050】本発明の請求項2記載の電力量計によれ
ば、負荷時の電圧区分毎発生頻度カウント部を設けたこ
とにより、負荷運転時の電路の電圧変動特性を知ること
ができるため、負荷運転時における電力量計量部による
電力量に対して電路電圧の分析ができ、電力量を削減す
る上で有用な情報を得ることができる。According to the watt hour meter according to the second aspect of the present invention, since the occurrence frequency counting unit for each voltage division at the time of load is provided, the voltage fluctuation characteristics of the electric circuit at the time of load operation can be known. The electric circuit voltage can be analyzed with respect to the electric energy by the electric energy meter during the load operation, and useful information for reducing the electric energy can be obtained.
【0051】本発明の請求項3記載の電力量計によれ
ば、電圧−電力特性算出部を設けたことにより、特別に
電路の電圧を変えることなく、電力量を削減する上で有
用な情報である電圧と電力の関係を得ることができる。According to the watt hour meter according to the third aspect of the present invention, since the voltage-power characteristic calculating section is provided, information useful for reducing the amount of power without changing the voltage of the electric circuit. The relationship between voltage and power can be obtained.
【0052】本発明の請求項4記載の電力量計によれ
ば、請求項3記載の電力量計において、さらに電力量シ
ミュレーション部を設けたことにより、電路の電圧を特
定電圧に改善したときの電力量をシミュレーションにて
容易に知ることができる。According to the watt hour meter according to the fourth aspect of the present invention, the watt hour meter according to the third aspect further includes a power amount simulation unit, so that the voltage of the electric circuit can be improved to a specific voltage. The amount of power can be easily known by simulation.
【0053】本発明の請求項5記載の電力量計によれ
ば、請求項4記載の電力量計において、さらに電力量削
減算出部を設けたことにより、電路の電圧を特定電圧に
変更した場合の電力量削減効果を容易に知ることができ
る。According to the watt hour meter according to the fifth aspect of the present invention, the power meter according to the fourth aspect further includes a power amount reduction calculating unit, so that the voltage of the electric circuit is changed to a specific voltage. Power consumption reduction effect can be easily known.
【0054】本発明の請求項6記載の電力量計によれ
ば、請求項3記載の電力量計において、さらに最適電圧
算出部と電力量シミュレーション部を設けたことによ
り、電路の電圧を最大効率となる最適電圧に改善したと
きの電力量をシミュレーションにて容易に知ることがで
きる。According to the watt hour meter of the present invention, the watt hour meter of the third aspect is further provided with an optimum voltage calculating section and a power amount simulating section so that the voltage of the electric circuit can be maximized. The amount of power when the voltage is improved to the optimum voltage can be easily known by simulation.
【図1】本発明の第1の実施の形態の電力量計の構成を
示すブロック図。FIG. 1 is a block diagram showing a configuration of a watt hour meter according to a first embodiment of the present invention.
【図2】本発明の第1の実施の形態における電圧区分毎
発生頻度カウント部または負荷時の電圧区分毎発生頻度
カウント部による電圧区分−頻度特性図。FIG. 2 is a voltage section-frequency characteristic diagram by a voltage section-based occurrence frequency counting section or a voltage section-based occurrence frequency counting section under load in the first embodiment of the present invention.
【図3】本発明の第1の実施の形態における電圧−電力
特性算出部による電圧−電力特性図。FIG. 3 is a voltage-power characteristic diagram by a voltage-power characteristic calculation unit according to the first embodiment of the present invention.
【図4】本発明の第1の実施の形態における電力量をシ
ミュレーションにより求める方法を説明するための図。FIG. 4 is a view for explaining a method of obtaining a power amount by simulation according to the first embodiment of the present invention.
【図5】本発明の第2の実施の形態の電力量計の構成を
示すブロック図。FIG. 5 is a block diagram illustrating a configuration of a watt hour meter according to a second embodiment of the present invention.
【図6】従来の電力量計の構成を示すブロック図。FIG. 6 is a block diagram showing a configuration of a conventional watt hour meter.
1 交流電路 2 変流器 3 負荷 4 本発明の第1の実施の形態の電力量計 41 電圧計測部 42 電流計測部 43 電力量計量部 44 電力計測部 45 電圧区分毎発生頻度カウント部 46 負荷時の電圧区分毎発生頻度カウント部 47 電圧−電力特性算出部 48 特定電圧における電力量シミュレーション部 49 電力量削減算出部 5 本発明の第2の実施の形態の電力量計 51 最適電圧算出部 52 最適電圧における電力量シミュレーション部 DESCRIPTION OF SYMBOLS 1 AC electric circuit 2 Current transformer 3 Load 4 Watt hour meter 41 of the first embodiment of the present invention 41 Voltage measuring unit 42 Current measuring unit 43 Power amount measuring unit 44 Power measuring unit 45 Voltage frequency generation frequency counting unit 46 Load Occurrence frequency counting unit for each voltage division at the time 47 Voltage-power characteristic calculation unit 48 Power amount simulation unit at specific voltage 49 Power amount reduction calculation unit 5 Watt hour meter 51 of the second embodiment of the present invention 51 Optimal voltage calculation unit 52 Energy simulation unit at optimal voltage
Claims (6)
部と、前記電路の電流を連続的に計測する電流計測部
と、前記電圧計測部による電圧計測値および前記電流計
測部による電流計測値に基づいて電力量を計量する電力
量計量部とを備えた電力量計であって、 前記電圧計測部の計測電圧の範囲を複数に分割して電圧
区分とし、前記電圧計測部により連続的に計測される電
圧計測値を入力し、入力される電圧計測値の各電圧区分
に対する発生頻度を算出する電圧区分毎発生頻度カウン
ト部を設けたことを特徴とする電力量計。1. A voltage measuring unit for continuously measuring a voltage of a circuit, a current measuring unit for continuously measuring a current of the circuit, a voltage measured by the voltage measuring unit and a current measurement by the current measuring unit. A watt hour meter that measures the amount of power based on the value, wherein the range of the measured voltage of the voltage measurement unit is divided into a plurality of voltage divisions, and the voltage measurement unit continuously A watt hour meter, wherein a voltage measurement value to be measured is input, and an occurrence frequency counting unit for each voltage section is provided which calculates an occurrence frequency of the input voltage measurement value for each voltage section.
部と、前記電路の電流を連続的に計測する電流計測部
と、前記電圧計測部による電圧計測値および前記電流計
測部による電流計測値に基づいて電力量を計量する電力
量計量部とを備えた電力量計であって、 前記電圧計測部の計測電圧の範囲を複数に分割して電圧
区分とし、前記電圧計測部により連続的に計測される電
圧計測値を入力し、入力される電圧計測値の中から前記
電路に接続された負荷の運転時のみの電圧計測値を抽出
し、抽出した電圧計測値の各電圧区分に対する発生頻度
を算出する負荷時の電圧区分毎発生頻度カウント部を設
けたことを特徴とする電力量計。2. A voltage measuring unit for continuously measuring a voltage of a circuit, a current measuring unit for continuously measuring a current of the circuit, a voltage measured by the voltage measuring unit, and a current measurement by the current measuring unit. A watt hour meter that measures the amount of power based on the value, wherein the range of the measured voltage of the voltage measurement unit is divided into a plurality of voltage divisions, and the voltage measurement unit continuously The voltage measurement value to be measured is input, and the voltage measurement value only when the load connected to the electric circuit is operated is extracted from the input voltage measurement value, and the extracted voltage measurement value is generated for each voltage category. A watt hour meter provided with an occurrence frequency counting unit for each voltage division at the time of load for calculating a frequency.
部と、前記電路の電流を連続的に計測する電流計測部
と、前記電圧計測部による電圧計測値および前記電流計
測部による電流計測値に基づいて電力を計測する電力計
測部と、前記電圧計測部による電圧計測値および前記電
流計測部による電流計測値に基づいて電力量を計量する
電力量計量部とを備えた電力量計であって、 同一時刻で計測される前記電圧計測部の電圧計測値と前
記電力計測部の電力計測値とから電圧と電力との関係を
求める電圧−電力特性算出部を設けたことを特徴とする
電力量計。3. A voltage measuring unit for continuously measuring a voltage of a circuit, a current measuring unit for continuously measuring a current of the circuit, a voltage measured by the voltage measuring unit, and a current measurement by the current measuring unit. A power measuring unit that measures power based on a value, and a watt hour meter that includes a power measuring unit that measures power based on a voltage measured by the voltage measuring unit and a current measured by the current measuring unit. A voltage-power characteristic calculation unit that obtains a relationship between voltage and power from a voltage measurement value of the voltage measurement unit measured at the same time and a power measurement value of the power measurement unit. Watt hour meter.
計測値と電力計測部の電力計測値とに対応する電圧−電
力特性算出部で求めた電圧と電力との関係を用いて特定
電圧としたときの電力を算出し、この算出値を用いて所
定期間内における特定電圧としたときの電力量を算出す
る電力量シミュレーション部を設けたことを特徴とする
請求項3記載の電力量計。4. A specific voltage using a relationship between the voltage and the power obtained by the voltage-power characteristic calculation unit corresponding to the voltage measurement value of the voltage measurement unit measured at the same time and the power measurement value of the power measurement unit. 4. The watt hour meter according to claim 3, further comprising: a power amount simulation unit that calculates the power when the specified voltage is obtained within a predetermined period by using the calculated value. .
ける電力量と、電力量シミュレーション部で算出した前
記所定期間内における特定電圧としたときの電力量との
差を求める電力量削減算出部を設けたことを特徴とする
請求項4記載の電力量計。5. A power amount reduction calculation unit for calculating a difference between the power amount within a predetermined period calculated by the power amount measurement unit and the power amount calculated as a specific voltage within the predetermined period calculated by the power amount simulation unit. 5. The watt hour meter according to claim 4, wherein:
力との関係から最大効率となる最適電圧を求める最適電
圧算出部と、 前記電圧−電力特性算出部で求めた電圧と電力との関係
を用いて前記最適電圧算出部で求めた最適電圧としたと
きの電力を算出し、この算出値を用いて所定期間内にお
ける最適電圧としたときの電力量を算出する電力量シミ
ュレーション部とを設けたことを特徴とする請求項3記
載の電力量計。6. An optimum voltage calculating section for obtaining an optimum voltage having a maximum efficiency from a relationship between the voltage and the power obtained by the voltage-power characteristic calculating section, and a voltage and power obtained by the voltage-power characteristic calculating section. A power amount simulation unit that calculates the power when the optimum voltage is obtained by the optimum voltage calculation unit using the relationship, and calculates the power amount when the optimum voltage is obtained within a predetermined period by using the calculated value. The watt hour meter according to claim 3, wherein the watt hour meter is provided.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000374592A JP2002174648A (en) | 2000-12-08 | 2000-12-08 | Watt-hour meter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000374592A JP2002174648A (en) | 2000-12-08 | 2000-12-08 | Watt-hour meter |
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Publication Number | Publication Date |
---|---|
JP2002174648A true JP2002174648A (en) | 2002-06-21 |
Family
ID=18843751
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103018584A (en) * | 2012-11-05 | 2013-04-03 | 中国电力科学研究院 | Measuring and verifying method for electric power and electric quantity conservation of electric power boost reconstruction |
CN102914706B (en) * | 2012-07-20 | 2015-11-11 | 中国电力科学研究院 | The amount of energy saving that a kind of substation transformer is changed is measured and verification method |
-
2000
- 2000-12-08 JP JP2000374592A patent/JP2002174648A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102914706B (en) * | 2012-07-20 | 2015-11-11 | 中国电力科学研究院 | The amount of energy saving that a kind of substation transformer is changed is measured and verification method |
CN103018584A (en) * | 2012-11-05 | 2013-04-03 | 中国电力科学研究院 | Measuring and verifying method for electric power and electric quantity conservation of electric power boost reconstruction |
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