JP2001133496A - Multi power-measuring instrument - Google Patents
Multi power-measuring instrumentInfo
- Publication number
- JP2001133496A JP2001133496A JP31546299A JP31546299A JP2001133496A JP 2001133496 A JP2001133496 A JP 2001133496A JP 31546299 A JP31546299 A JP 31546299A JP 31546299 A JP31546299 A JP 31546299A JP 2001133496 A JP2001133496 A JP 2001133496A
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- JP
- Japan
- Prior art keywords
- phase
- line
- power
- electric circuit
- wire
- 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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Abstract
Description
【０００１】[0001]
【従来の技術】単相３線式電路あるいは３相３線式電路
において、各線間に接続される負荷が異なり不平衡であ
る場合、変圧器が発熱するなど、電路に接続される機器
に悪影響を及ぼす。近年、エアコンなど家庭用電気機器
の容量が増加しており、不平衡が大きくなる傾向にある
ことから不平衡率を計測する必要性が高まっている。2. Description of the Related Art In a single-phase three-wire circuit or a three-phase three-wire circuit, when loads connected between lines are different and unbalanced, transformers generate heat and adversely affect equipment connected to the lines. Effect. In recent years, the capacity of household electric appliances such as air conditioners has increased, and the imbalance tends to increase. Therefore, the necessity of measuring the unbalance ratio is increasing.
【０００２】日本電気協会発行の内線規程によれば、設
備不平衡率は以下に定義される。According to the extension rules issued by the Japan Electrical Association, the equipment imbalance rate is defined as follows.
【０００３】単相３線式電路においては、 設備不平衡率（％）＝（中性線と他の２線との間にそれ
ぞれ接続される負荷設備容量の間の差）÷（総負荷設備
容量の１／２）×１００ ３相３線式電路においては、 設備不平衡率（％）＝（各線間に接続される負荷設備容
量の最大と最小の差）÷（総負荷設備容量の１／３）×
１００ 建築物の設計段階では、上記の設備不平衡率が規定値内
に入るように負荷が各線間に配分される。In a single-phase three-wire circuit, the equipment imbalance rate (%) = (difference between the load equipment capacity respectively connected between the neutral wire and the other two wires) ÷ (total load equipment) In a three-phase, three-wire circuit, the equipment imbalance rate (%) = (the difference between the maximum and minimum load equipment capacities connected between the lines) ÷ (1 of the total load equipment capacity) / 3) ×
100 At the design stage of the building, the load is distributed among the lines so that the above-mentioned equipment imbalance rate falls within a specified value.
【０００４】[0004]
【発明が解決しようとする課題】建築物が完成し、稼動
した段階での実際の電路の不平衡率は設計段階での設備
不平衡率とはしばしば異なる。従って従来、建築物の完
成後に、線間電圧、線電流を計測し、それらの値から電
路の実際の不平衡率を計算により求め、求めた不平衡率
が大きい場合には配線を変更していた。The actual unbalance rate of the electric circuit when the building is completed and operated is often different from the equipment unbalance rate at the design stage. Therefore, conventionally, after the building is completed, the line voltage and line current are measured, the actual unbalance rate of the circuit is calculated from these values, and if the calculated unbalance rate is large, the wiring is changed. Was.
【０００５】しかしながら、計算により不平衡率を求め
ることは煩雑であり、時間がかかるので、工事あるいは
作業の効率が悪いという問題がある。また、不平衡率は
機器の稼動状況により時間的に変化するので、一定期
間、連続的に計測してその平均を求めることが好ましい
が、従来の手計算ではこれは困難である。[0005] However, obtaining the unbalance rate by calculation is complicated and time-consuming, so that there is a problem that the efficiency of construction or work is poor. In addition, since the unbalance rate changes over time depending on the operation state of the device, it is preferable to measure the average continuously for a certain period and obtain the average, but this is difficult with conventional manual calculation.
【０００６】本発明は、単相３線式電路及び３相３線式
電路の不平衡率を簡単に瞬時に知ることを可能にする手
段を提供することを課題とする。SUMMARY OF THE INVENTION It is an object of the present invention to provide a means for easily and instantaneously knowing the unbalance rate of a single-phase three-wire circuit and a three-phase three-wire circuit.
【０００７】[0007]
【課題を解決するための手段】単相３線式電路又は３相
３線式電路における種々の電気量を計測するマルチ電力
計測器において、計測された線電流及び線間電力のいず
れかに基づき電路の不平衡率を計算する手段と、該計算
された不平衡率を表示する手段とを備えたことを特徴と
する。SUMMARY OF THE INVENTION In a multi-power measuring instrument for measuring various electric quantities in a single-phase three-wire circuit or a three-phase three-wire circuit, a multi-power measuring instrument is used based on either the measured line current or line power. It is characterized by comprising means for calculating the unbalance rate of the electric circuit, and means for displaying the calculated unbalance rate.
【０００８】こうすることにより、建築物の完成後、該
建築物に引き込まれる電路の実際の不平衡率を容易に知
ることができ、また、不平衡率を連続的に計測・記録す
ることが可能になる。[0008] In this way, after the completion of the building, the actual unbalance rate of the electric circuit drawn into the building can be easily known, and the unbalance rate can be continuously measured and recorded. Will be possible.
【０００９】計測された線間電圧に基づき、計測中の電
路が単相３線式電路及び３相３線式電路のいずれである
かを自動的に判別する手段を備えることを特徴とする。The present invention is characterized in that there is provided a means for automatically judging whether the electric circuit under measurement is a single-phase three-wire circuit or a three-phase three-wire circuit based on the measured line voltage.
【００１０】こうすることにより、計測における初期設
定の誤りを防止できる。By doing so, it is possible to prevent an erroneous initial setting in measurement.
【００１１】前記表示手段は、不平衡率、線間電圧、線
電流、及び線間電力を同時に一括表示することを特徴と
する。[0011] The display means may simultaneously display the unbalance rate, line voltage, line current, and line power collectively.
【００１２】こうすることにより、表示を切り替えるこ
となく、不平衡率、線間電圧、線電流、及び線間電力を
同時に確認、記録できる。By doing so, the unbalance rate, line voltage, line current, and line power can be simultaneously checked and recorded without switching the display.
【００１３】[0013]
【発明の実施の形態】図２に本発明のマルチ電力計測器
のパネル部の外観を示す。パネル部の左側上部には計測
した電気量を表示するＬＣＤ表示器が取り付けられ、そ
の下にデータを外部に送るためのＲＳ−２３２Ｃコネク
タ及び直流電源電圧入力コネクタが取り付けられてい
る。FIG. 2 shows the appearance of a panel of a multi-power measuring instrument according to the present invention. An LCD display for displaying the measured amount of electricity is attached to an upper left portion of the panel unit, and an RS-232C connector for sending data to the outside and a DC power supply voltage input connector are attached below the LCD display.
【００１４】パネル部の右側上部には、電圧センサケー
ブルコネクタ、電流センサケーブルコネクタが取り付け
られ、その下に配線エラー表示ランプ及び充電中表示ラ
ンプが取り付けられている。配線エラー表示ランプは、
電圧センサ、電流センサが誤って接続された場合に点灯
するＬＥＤであり、充電中表示ランプは内蔵の蓄電池が
充電中である場合に点灯するＬＥＤである。A voltage sensor cable connector and a current sensor cable connector are attached to the upper right side of the panel, and a wiring error indicator lamp and a charging indicator lamp are attached below the connector. The wiring error indicator lamp
The LED that lights when the voltage sensor or the current sensor is erroneously connected, and the charging-indicating lamp is an LED that lights when the built-in storage battery is being charged.
【００１５】更にその下部には、リセット押しボタン、
ホールド押しボタン、ＣＯＳφ切り替え押しボタン、バ
ックライト押しボタン、テスタのみ押しボタン、電源ス
イッチが取り付けられている。リセット押しボタンは、
ＬＣＤ表示器を初期画面に戻すスイッチであり、ホール
ド押しボタンは、該ボタンを押した時点での計測値を保
持するスイッチである。ＣＯＳφ切り替え押しボタン
は、力率の線間の表示切り替えを行うスイッチであり、
バックライト押しボタンはＬＣＤ表示器のバックライト
点灯用スイッチである。テスタのみ押しボタンは、マル
チ電力計測器を通常のテスタとして機能するモードに設
定するスイッチであり、電圧及び電流のみを計測する際
に便利である。電源スイッチは、計測・充電を行わない
ＯＦＦ位置と、計測・充電を行うＯＮ位置と、充電のみ
を行う充電位置との間の切り替えを行う。[0015] Further below, a reset push button,
A hold push button, a COS φ switch push button, a backlight push button, a tester only push button, and a power switch are attached. The reset push button is
The switch is a switch for returning the LCD display to the initial screen, and the hold push button is a switch for holding the measured value at the time when the button is pressed. The COS φ switching push button is a switch for switching the display between the power factor lines,
The backlight push button is a switch for turning on the backlight of the LCD display. The tester-only push button is a switch that sets the multi-power measuring instrument to a mode that functions as a normal tester, and is convenient when measuring only voltage and current. The power switch switches between an OFF position where measurement and charging are not performed, an ON position where measurement and charging are performed, and a charging position where only charging is performed.
【００１６】図１は上記マルチ電力計測器の内部構成を
示すブロック図である。同図において、１から３は、そ
れぞれＲＳ（ＲＮ）、ＴＳ（ＴＮ），ＲＴ線間電圧を０
〜５ボルトのＡＣ信号に変換する電圧変換部、４から６
は電圧変換部１から３のＡＣ信号をＤＣ信号に変換する
ＡＣ／ＤＣ変換部、７から９はれぞれＲ相、Ｓ相（又は
Ｎ相）、Ｔ相のＡＣ電流信号をＤＣ信号に変換するＡＣ
／ＤＣ変換部である。１０はＲＳ（ＲＮ）線間電圧とＲ
相電流とを掛け合わせる掛け算部、１１はＴＳ（ＴＮ）
線間電圧とＴ相電流とを掛け合わせる掛け算部である。
ＡＣ／ＤＣ変換部４〜９及び掛け算部１０、１１から出
力されるアナログ信号は、Ａ／Ｄコンバータ１２でデジ
タル信号に変換される。FIG. 1 is a block diagram showing the internal configuration of the multi-power measuring instrument. In the figure, 1 to 3 indicate RS (RN), TS (TN), and RT line voltage, respectively, of 0.
Voltage converter for converting to AC signal of ~ 5 volts, 4 to 6
Is an AC / DC converter for converting the AC signals of the voltage converters 1 to 3 into DC signals, and 7 to 9 convert the R-phase, S-phase (or N-phase) and T-phase AC current signals into DC signals, respectively. AC to convert
/ DC converter. 10 is RS (RN) line voltage and R
Multiplication unit for multiplying by phase current, 11 is TS (TN)
This is a multiplier for multiplying the line voltage by the T-phase current.
Analog signals output from the AC / DC converters 4 to 9 and the multipliers 10 and 11 are converted into digital signals by the A / D converter 12.
【００１７】ＣＰＵ１３は、図２に関して説明した押し
ボタン及びスイッチに接続されたスイッチ入力部１５か
らの信号に基づき、Ａ／Ｄコンバータ１２から出力され
る信号に必要な演算処理を加え、ＬＣＤ表示部１４にそ
の結果を表示する。メモリ１７には、表示のための演算
処理及び制御に必要なプログラムが格納されている。計
測されたデータあるいは算出されたデータは、ＲＳ-２
３２Ｃ等のシリアル送信装置１６を介してパーソナルコ
ンピュータ等の外部機器に送ることができる。１８は、
上記の各ユニットに電源電圧を供給する蓄電池部であ
り、ＤＣ／ＤＣコンバータ及び蓄電池チャージャを備え
る。The CPU 13 performs necessary arithmetic processing on the signal output from the A / D converter 12 based on the signal from the switch input unit 15 connected to the push button and the switch described with reference to FIG. 14 shows the result. The memory 17 stores programs required for arithmetic processing and control for display. The measured or calculated data is RS-2
It can be sent to an external device such as a personal computer via a serial transmission device 16 such as 32C. 18 is
A storage battery unit that supplies a power supply voltage to each of the above units, and includes a DC / DC converter and a storage battery charger.
【００１８】次に、上記マルチ電力計測器の使用方法を
図３及び図４のフローチャートを参照して説明する。Next, a method of using the above multi-power measuring device will be described with reference to the flowcharts of FIGS.
【００１９】図３は、電圧、電流、電力、力率、不平衡
率の全てを計測する場合の操作手順を示している。ま
ず、電圧センサケーブル先端の電圧クリップを計測すべ
き線に取り付け、計測器の電源スイッチをＯＮにする。
ここでリセットボタンを押すと自動的に電力計測のゼロ
点調整が行われる。FIG. 3 shows an operation procedure for measuring all of voltage, current, power, power factor, and unbalance factor. First, the voltage clip at the tip of the voltage sensor cable is attached to the line to be measured, and the power switch of the measuring instrument is turned on.
Here, when the reset button is pressed, the zero point adjustment of the power measurement is automatically performed.
【００２０】次に計測すべき線に電流センサケーブル先
端の電流クランプを取り付ける。Next, a current clamp at the tip of the current sensor cable is attached to the line to be measured.
【００２１】これにより、電圧、電流、電力、力率、不
平衡率が計測され、それらの値がＬＣＤ表示部に同時に
一括表示される。不平衡率は、単相３線式電路の場合、
（中性線と他の２線との間のそれぞれの線間電力の差）
÷（中性線と他の２線との間のそれぞれの線間電力の和
の１／２）から算出し、３相３線式電路の場合、（各線
の線電流の最大と最小との差）÷（各線電流の和の１／
３）から算出する。３相３線式電路の場合、通常、各線
間電圧の差は、単相３線式電路の場合に比べ小さいの
で、線電流から不平衡率を計算しても実用上支障はな
い。また、測定中の電路が単相３線式電路であるかまた
は３相３線式電路であるかが、線間電圧から自動的に判
別される。これは、単相電路の場合、ＲＴ線間電圧は、
ＲＮ線間電圧及びＴＮ線間電圧の２倍であることから検
出できる。Thus, the voltage, current, power, power factor, and unbalance factor are measured, and the values are simultaneously displayed on the LCD display unit. The unbalance rate is calculated for a single-phase three-wire circuit.
(Difference in power between the neutral line and the other two lines)
÷ (1/2 of the sum of the respective line powers between the neutral line and the other two lines), and in the case of a three-phase three-wire circuit, (the maximum and minimum line currents of each line) Difference) ÷ (1/1 of the sum of each line current)
Calculated from 3). In the case of a three-phase three-wire circuit, the difference between line voltages is usually smaller than that of a single-phase three-wire circuit, so that there is no practical problem even if the unbalance ratio is calculated from the line current. Whether the electric circuit under measurement is a single-phase three-wire electric circuit or a three-phase three-wire electric circuit is automatically determined from the line voltage. This means that for a single-phase circuit, the RT line voltage is
It can be detected because it is twice the RN line voltage and the TN line voltage.
【００２２】他の地点を計測する必要がない場合は電源
スイッチをＯＦＦとし、計測の必要がある場合は電圧セ
ンサ、電流センサを新たな地点まで移動する。ここで、
電路が前の地点の電路と同種（単相３線式電路あるいは
３相３線式電路）であれば、そのまま電圧クリップ及び
電流クランプを測定すべき線に取り付け、計測を行う。
電路の種類が前の地点の電路と異なる場合には、電圧ク
リップを取り付けた後、リセットボタンを押して再度ゼ
ロ点調整を行い、次に電流クランプを取り付けて計測を
行う。When it is not necessary to measure another point, the power switch is turned off. When it is necessary to measure, the voltage sensor and the current sensor are moved to a new point. here,
If the electric circuit is of the same type as the electric circuit at the previous point (single-phase three-wire electric circuit or three-phase three-wire electric circuit), the voltage clip and the current clamp are attached to the line to be measured and measurement is performed.
If the type of the electric circuit is different from the electric circuit at the previous point, attach the voltage clip, press the reset button, adjust the zero point again, and then attach the current clamp and measure.
【００２３】図４は、電圧及び電流のみを測定する場合
の操作手順を示すものである。この場合、電源スイッチ
をＯＮにした後、マルチ電力計測器をテスタとして使う
ために、テスタのみ押しボタンを押す。尚、テスタのみ
押しボタンを押さない場合には図３の「＊」点にジャン
プし、電圧、電流、電力、力率、不平衡率の全てを計測
するモードになる。FIG. 4 shows an operation procedure when only voltage and current are measured. In this case, after turning on the power switch, only the tester pushes the push button in order to use the multi power meter as a tester. If only the tester does not press the push button, the mode jumps to the “*” point in FIG. 3 and enters a mode in which all of the voltage, current, power, power factor, and unbalance rate are measured.
【００２４】次に電圧クリップ及び電流クランプを計測
すべき線に取り付け計測を行う。他の地点を計測する必
要がない場合は電源スイッチをＯＦＦとし、その必要が
ある場合には電圧センサ、電流センサを新たな計測地点
に移動し、電圧クリップ及び電流クランプを計測すべき
線に取り付け計測を行う。Next, a voltage clip and a current clamp are attached to a line to be measured, and measurement is performed. If it is not necessary to measure another point, turn off the power switch. If necessary, move the voltage sensor and current sensor to the new measurement point and attach the voltage clip and current clamp to the line to be measured. Perform measurement.
【００２５】[0025]
【発明の効果】本発明によれば、単相３線式電路及び３
相３線式電路の不平衡率を、簡単に瞬時に知ることがで
きる。According to the present invention, a single-phase three-wire circuit and a three-phase
The unbalance rate of the phase three-wire circuit can be easily and instantaneously known.
【図１】本発明のマルチ電力計測器の構成を示すブロッ
ク図である。FIG. 1 is a block diagram showing a configuration of a multi power meter according to the present invention.
【図２】本発明のマルチ電力計測器のパネル部の外観図
である。FIG. 2 is an external view of a panel portion of the multi power meter according to the present invention.
【図３】本発明のマルチ電力計測器の操作手順を示すフ
ローチャートである。FIG. 3 is a flowchart showing an operation procedure of the multi-power measuring instrument of the present invention.
【図４】本発明のマルチ電力計測器をテスターとして使
用する際の操作手順を示すフローチャートである。FIG. 4 is a flowchart showing an operation procedure when the multi-power measuring instrument of the present invention is used as a tester.
１、２、３：電圧変換部 ４〜９：ＡＣ／ＤＣ変換部 １０、１１：掛け算部 １２：Ａ／Ｄコンバータ １３：ＣＰＵ １４：ＬＣＤ表示部 １５：スイッチ入力部 １６：シリアル送信部 １７：メモリ １８：蓄電池部 1, 2, 3: voltage converters 4 to 9: AC / DC converters 10, 11: multipliers 12: A / D converters 13: CPU 14: LCD display unit 15: switch input unit 16: serial transmission unit 17: Memory 18: Battery unit
───────────────────────────────────────────────────── フロントページの続き (72)発明者 太田 良治 宮城県仙台市宮城野区榴岡四丁目１番１号 株式会社ユアテック内線部統轄グループ 内 (72)発明者 中山 哲克 宮城県仙台市宮城野区榴岡四丁目１番１号 株式会社ユアテック内線部統轄グループ 内 (72)発明者 三浦康二 宮城県仙台市宮城野区榴岡四丁目１番１号 株式会社ユアテック内線部統轄グループ 内 (72)発明者 中野 弘伸 千葉県習志野市本大久保１丁目４番19号 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Ryoji Ota 4-1-1, Hiroka, Miyagino-ku, Sendai, Miyagi Prefecture Within the group governing the extension department of Yurtec Corporation (72) Inventor Tetsukatsu Nakayama Hiroka, Miyagino-ku, Sendai, Miyagi Prefecture 4-1-1, Yutec Corporation Extension Group Supervision Group (72) Inventor Koji Miura 4-1-1 Haruka, Miyagino-ku, Sendai City, Miyagi Prefecture Yurtec Extension Division Supervision Group (72) Inventor Hironobu Nakano 1-4-19, Okubo, Narashino-shi, Chiba
Claims (4)
ける種々の電気量を計測するマルチ電力計測器におい
て、計測された線電流及び線間電力のいずれかに基づき
電路の不平衡率を計算する手段と、該計算された不平衡
率を表示する手段とを備えたことを特徴とするマルチ電
力計測器。1. A multi-power measuring device for measuring various amounts of electricity in a single-phase three-wire circuit or a three-phase three-wire circuit, the unbalance of the circuit based on either the measured line current or line power. A multi-power meter comprising: means for calculating a rate; and means for displaying the calculated unbalance rate.
相３線式電路の不平衡率を、（中性線と他の２線との間
のそれぞれの線間電力の差）÷（中性線と他の２線との
間のそれぞれの線間電力の和の１／２）から算出し、３
相３線式電路の不平衡率を（各線の線電流の最大と最小
との差）÷（各線電流の和の１／３）から算出すること
を特徴とするマルチ電力計測器。2. The method according to claim 1, wherein the calculating unit calculates an unbalance rate of the single-phase three-wire circuit as (a difference between line powers between the neutral wire and the other two wires) ÷ ( Calculated from） of the sum of the respective line powers between the neutral line and the other two lines, and 3
A multi-power measuring instrument, wherein an unbalance ratio of a phase three-wire circuit is calculated from (the difference between the maximum and the minimum of the line current of each line) / (1/3 of the sum of the line currents).
間電圧に基づき、計測中の電路が単相３線式電路及び３
相３線式電路のいずれであるかを自動的に判別する手段
を備えることを特徴とするマルチ電力計測器。3. The electric circuit under measurement according to claim 1, wherein the electric circuit under measurement is a single-phase three-wire electric circuit and the electric circuit under measurement based on the measured line voltage.
A multi-power measuring instrument comprising means for automatically determining which of a three-wire circuit is a phase three-wire circuit.
て、前記表示手段は、不平衡率、線間電圧、線電流、及
び線間電力を同時に一括表示することを特徴とするマル
チ電力計測器。4. The multi-power measurement device according to claim 1, wherein the display unit simultaneously displays the unbalance ratio, the line voltage, the line current, and the line power collectively. vessel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31546299A JP3448735B2 (en) | 1999-11-05 | 1999-11-05 | Multi power meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31546299A JP3448735B2 (en) | 1999-11-05 | 1999-11-05 | Multi power meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001133496A true JP2001133496A (en) | 2001-05-18 |
| JP3448735B2 JP3448735B2 (en) | 2003-09-22 |
Family
ID=18065660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31546299A Expired - Fee Related JP3448735B2 (en) | 1999-11-05 | 1999-11-05 | Multi power meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3448735B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100775340B1 (en) * | 2006-10-25 | 2007-11-08 | 엘에스산전 주식회사 | Apparatus and method for measuring line-to-line voltage |
| JP2015106950A (en) * | 2013-11-28 | 2015-06-08 | 富士通株式会社 | Estimation program, estimation method and estimation apparatus |
| JP2015211537A (en) * | 2014-04-25 | 2015-11-24 | シャープ株式会社 | Display divice, power conditioner, and power conditioning system |
| CN105891612A (en) * | 2016-03-29 | 2016-08-24 | 国网甘肃省电力公司电力科学研究院 | Method for quantified assessing three-phase imbalance treating effect |
| JP2017216874A (en) * | 2017-07-18 | 2017-12-07 | 富士通株式会社 | Estimation program, estimation method, and estimation apparatus |
| CN115561517A (en) * | 2022-12-05 | 2023-01-03 | 北京志翔科技股份有限公司 | Method, device and equipment for determining split-phase electric quantity of three-phase electric quantity |
-
1999
- 1999-11-05 JP JP31546299A patent/JP3448735B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100775340B1 (en) * | 2006-10-25 | 2007-11-08 | 엘에스산전 주식회사 | Apparatus and method for measuring line-to-line voltage |
| JP2015106950A (en) * | 2013-11-28 | 2015-06-08 | 富士通株式会社 | Estimation program, estimation method and estimation apparatus |
| JP2015211537A (en) * | 2014-04-25 | 2015-11-24 | シャープ株式会社 | Display divice, power conditioner, and power conditioning system |
| CN105891612A (en) * | 2016-03-29 | 2016-08-24 | 国网甘肃省电力公司电力科学研究院 | Method for quantified assessing three-phase imbalance treating effect |
| CN105891612B (en) * | 2016-03-29 | 2019-01-01 | 国网甘肃省电力公司电力科学研究院 | A kind of three-phase imbalance regulation effect quantitative estimation method |
| JP2017216874A (en) * | 2017-07-18 | 2017-12-07 | 富士通株式会社 | Estimation program, estimation method, and estimation apparatus |
| CN115561517A (en) * | 2022-12-05 | 2023-01-03 | 北京志翔科技股份有限公司 | Method, device and equipment for determining split-phase electric quantity of three-phase electric quantity |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3448735B2 (en) | 2003-09-22 |
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