JP2011069741A - Ac/dc wattmeter - Google Patents

Ac/dc wattmeter Download PDF

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JP2011069741A
JP2011069741A JP2009221503A JP2009221503A JP2011069741A JP 2011069741 A JP2011069741 A JP 2011069741A JP 2009221503 A JP2009221503 A JP 2009221503A JP 2009221503 A JP2009221503 A JP 2009221503A JP 2011069741 A JP2011069741 A JP 2011069741A
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power
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voltage
component
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JP5432651B2 (en
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Yukinori Kojima
幸功 児島
Katsumi Takegawa
勝己 竹川
Shosei Matsumoto
正誠 松本
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Panasonic Industrial Devices SUNX Tatsuno Co Ltd
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Panasonic Electric Works SUNX Tatsuno Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an AC/DC wattmeter capable of measuring both DC power and AC power. <P>SOLUTION: The AC/DC wattmeter 1 includes: a current detection section 12 for outputting a signal of a size corresponding to a current value of an input current flowing in a power line L1; a voltage detection section 13 for outputting a signal of a size corresponding to a voltage value of an input voltage impressed on the power line L1; and a power calculation section 14. The power calculation section 14 includes: a current AC/DC separation part 14a for separating the signal output from the current detection section 12 into a DC current signal corresponding to a DC current component and an AC current signal corresponding to an AC current component, and outputting the separated signals; a voltage AC/DC separation part 14b for separating the signal output from the voltage detection section 13 into a DC voltage signal corresponding to a DC voltage component and an AC voltage signal corresponding to an AC voltage component, and outputting the separated signals; a DC power calculation part 14c for calculating a power value of the DC components from the DC current signal and the DC voltage signal; and an AC power calculation part 14e for calculating a power value of the AC components from the AC current signal and the AC voltage signal. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、交直両用電力計に関するものである。   The present invention relates to an AC / DC power meter.

近年、太陽電池の普及や省エネルギの推進などの観点から、一般の住宅に直流電力を配電する直流配電システムを導入し、直流電力の給電を受けて動作する直流負荷に直流電力を直接配電することが検討されている。しかしながら、住宅内の電気機器の中でも消費電力が比較的大きい冷蔵庫やエアコンなどの機器に直流電力を給電して動作させようとすると、給電電圧が高電圧となるため、消費電力の大きな負荷に対しては従来と同様、交流電力を給電することが考えられ、家庭内に直流電力を配電するシステムと交流電力を配電するシステムを併存させることが考えられている。   In recent years, from the viewpoint of the spread of solar cells and the promotion of energy saving, a DC power distribution system that distributes DC power to ordinary houses has been introduced, and DC power is directly distributed to DC loads that operate by receiving DC power. It is being considered. However, when electric power is supplied to a device such as a refrigerator or an air conditioner that consumes relatively large power among the electrical devices in the house, the power supply voltage becomes high voltage. As in the past, it is conceivable to supply AC power, and it is considered that a system for distributing DC power and a system for distributing AC power coexist in the home.

ここで、直流電力と交流電力の両方を配電する場合、同じ電力線に交流電力と直流電力を重畳して配電し、負荷側で直流又は交流を分離して受電する方式と、交流電力を給電するための電力線と直流電力を給電するための電力線を別々に配線する方式とが考えられるが、消費電力を計測するために、直流電力用の電力計と交流電力用の電力計とを別々に用意する必要があった。例えば特許文献１に示される電力モニタリングシステムでは、太陽電池モジュールにより発電される直流電力の瞬時値および積算値を直流電力計により計測するとともに、商用交流電力線から供給される交流消費電力の瞬時値および積算値を交流電力計により計測し、直流電力計および交流電力計の計測結果をモニタに表示させていた。   Here, when both DC power and AC power are distributed, AC power and DC power are superimposed on the same power line and distributed, and DC or AC is separated and received on the load side, and AC power is supplied. A power line for supplying DC power and a power line for supplying DC power can be considered separately, but a wattmeter for DC power and a wattmeter for AC power are prepared separately to measure power consumption. There was a need to do. For example, in the power monitoring system disclosed in Patent Document 1, an instantaneous value and an integrated value of DC power generated by a solar cell module are measured by a DC wattmeter, and an instantaneous value of AC power consumption supplied from a commercial AC power line and The integrated value was measured with an AC wattmeter, and the measurement results of the DC wattmeter and the AC wattmeter were displayed on the monitor.

特開２０００−３１４７５２号公報JP 2000-314752 A

上述のように従来は、直流電力を計測する直流電力計と、交流電力を計測する交流電力計とを別々に設ける必要があり、一台の電力計で直流電力と交流電力の両方を計測することはできなかった。   As described above, conventionally, it is necessary to separately provide a DC wattmeter for measuring DC power and an AC wattmeter for measuring AC power. A single wattmeter measures both DC power and AC power. I couldn't.

本発明は上記問題点に鑑みて為されたものであり、その目的とするところは、１台で直流電力と交流電力の両方を計測できる交直両用電力計を提供することにある。   The present invention has been made in view of the above problems, and an object thereof is to provide an AC / DC power meter capable of measuring both DC power and AC power with a single unit.

上記目的を達成するために、請求項１の発明は、電力線に流れる、直流電流成分又は交流電流成分の少なくとも何れか一方を含む入力電流の電流値に応じた大きさの信号を出力する電流検出部と、電流検出部から出力される信号を、直流電流成分に対応した直流電流信号と交流電流成分に対応した交流電流信号とに分離して出力する電流交直分離部と、電力線に印加される、直流電圧成分又は交流電圧成分の少なくとも何れか一方を含む入力電圧の電圧値に応じた大きさの信号を出力する電圧検出部と、電圧検出部から出力される信号を、直流電圧成分に対応した直流電圧信号と交流電圧成分に対応した交流電圧信号とに分離して出力する電圧交直分離部と、電流交直分離部から出力される直流電流信号および電圧交直分離部から出力される直流電圧信号より直流成分の電力値を算出する直流電力算出部と、電流交直分離部から出力される交流電流信号および電圧交直分離部から出力される交流電圧信号より交流成分の電力値を算出する交流電力算出部とを備えたことを特徴とする。   In order to achieve the above object, the invention according to claim 1 is the current detection for outputting a signal having a magnitude corresponding to the current value of the input current including at least one of the direct current component and the alternating current component flowing through the power line. And a current AC / DC separation unit for separating and outputting a signal output from the current detection unit into a direct current signal corresponding to the direct current component and an alternating current signal corresponding to the alternating current component, and applied to the power line A voltage detector that outputs a signal having a magnitude corresponding to the voltage value of the input voltage including at least one of a DC voltage component and an AC voltage component, and a signal output from the voltage detector corresponds to the DC voltage component Voltage AC / DC separation unit that outputs the separated DC voltage signal and AC voltage signal corresponding to the AC voltage component, and the DC current signal output from the current AC / DC separation unit and the voltage AC / DC separation unit. A DC power calculation unit that calculates a DC component power value from the current voltage signal, an AC current signal output from the current AC / DC separation unit, and an AC voltage signal output from the voltage AC / DC separation unit. And an AC power calculation unit.

請求項２の発明は、請求項１の発明において、直流電力算出部が算出した直流成分の電力値を積算して直流の電力量を求める直流電力積算部と、交流電力算出部が算出した交流成分の電力値を積算して交流の電力量を求める交流電力積算部とを備えたことを特徴とする。   According to a second aspect of the present invention, in the first aspect of the invention, the direct-current power integration unit that calculates the amount of direct-current power by integrating the power values of the direct-current components calculated by the direct-current power calculation unit, and the alternating current calculated by the alternating-current power calculation unit An AC power integration unit that integrates the power values of the components to determine the amount of AC power is provided.

請求項３の発明は、請求項１の発明において、電力線は直流電力を配電する直流電力線であり、交流電力算出部が算出した交流成分の電力値が所定の許容上限値を超えると、交流電力の流入を報知する報知部を備えたことを特徴とする。   According to a third aspect of the present invention, in the first aspect of the invention, the power line is a direct current power line that distributes direct current power, and when the alternating current component power value calculated by the alternating current power calculation unit exceeds a predetermined allowable upper limit value, the alternating current power It is characterized by having a notifying unit for notifying the inflow of.

請求項４の発明は、請求項１の発明において、電力線は交流電力を配電する交流電力線であり、直流電力算出部が算出した直流成分の電力値が所定の許容上限値を超えると、直流電力の流入を報知する報知部を備えたことを特徴とする。   According to a fourth aspect of the present invention, in the first aspect of the invention, the power line is an AC power line that distributes AC power, and when the power value of the DC component calculated by the DC power calculation unit exceeds a predetermined allowable upper limit value, the DC power It is characterized by having a notifying unit for notifying the inflow of.

請求項１の発明によれば、電流交直分離部が電力線に流れる電流の直流電流成分に対応した直流電流信号と交流電流成分に対応した交流電流信号とを分離して出力するとともに、電圧交直分離部が電線間に印加される電圧の直流電圧成分に対応した直流電圧信号と交流電圧成分に対応した交流電圧信号とを分離して出力しており、直流電力算出部が、直流電流信号および直流電圧信号から直流成分の電力値を算出し、交流電力算出部が、交流電流信号および交流電圧信号から交流成分の電力値を算出しているので、１台の電力計で直流電力と交流電力の両方を測定することができる。   According to the first aspect of the present invention, the current AC / DC separator separates and outputs the DC current signal corresponding to the DC current component of the current flowing through the power line and the AC current signal corresponding to the AC current component, and the voltage AC / DC separation. The DC voltage signal corresponding to the DC voltage component of the voltage applied between the wires and the AC voltage signal corresponding to the AC voltage component are separated and output. Since the power value of the DC component is calculated from the voltage signal and the AC power calculation unit calculates the power value of the AC component from the AC current signal and the AC voltage signal, the DC power and AC power can be calculated with one wattmeter. Both can be measured.

請求項２の発明によれば、直流成分の電力値、交流成分の電力値をそれぞれ積算することによって、１台の電力計で直流の電力量および交流の電力量を両方共に測定することができる。   According to the invention of claim 2, by integrating the power value of the DC component and the power value of the AC component, it is possible to measure both the DC power amount and the AC power amount with one wattmeter. .

請求項３の発明によれば、報知部の報知動作によって、直流電力線に許容上限値を越える電力値の交流成分が流入したことをユーザに知らしめることができる。   According to the invention of claim 3, it is possible to notify the user that an AC component having a power value exceeding the allowable upper limit value has flowed into the DC power line by the notification operation of the notification unit.

請求項４の発明によれば、報知部の報知動作によって、交流電力線に許容上限値を越える電力値の直流成分が流入したことをユーザに知らしめることができる。   According to the invention of claim 4, it is possible to notify the user that the DC component of the power value exceeding the allowable upper limit value has flowed into the AC power line by the notification operation of the notification unit.

本実施形態の交直両用電力計のブロック図である。It is a block diagram of the AC / DC power meter of this embodiment. 同上を用いた配電システムの概略的なシステム構成図である。It is a schematic system configuration diagram of a power distribution system using the same as above. 同上の動作を説明するフローチャートである。It is a flowchart explaining operation | movement same as the above.

本発明に係る交直両用電力計の実施形態を図面に基づいて説明する。   An embodiment of an AC / DC power meter according to the present invention will be described with reference to the drawings.

図２は、本実施形態の交直両用電力計１を用いる配電システムの概略的なシステム構成図である。この配電システムは、２本の電力線Ｌ１を用いて、負荷設備２に交流電力および直流電力を重畳して配電するＡＣ／ＤＣハイブリッド型の配電方式を採用しており、図示しない電源と負荷設備２との間にはブレーカ３が接続されている。   FIG. 2 is a schematic system configuration diagram of a power distribution system using the AC / DC power meter 1 of the present embodiment. This power distribution system employs an AC / DC hybrid type power distribution system in which AC power and DC power are superimposed and distributed on the load facility 2 using two power lines L1. A breaker 3 is connected between the two.

図１は交直両用電力計１のブロック図である。交直両用電力計１は、ホール素子センサ１１と、電流検出部１２と、電圧検出部１３と、電力演算部１４と、制御部１５と、表示部１６と、報知出力部１７と、記憶部１８と、電源部１９とを主要な構成として備えており、以下に各部の構成を説明する。   FIG. 1 is a block diagram of an AC / DC power meter 1. The AC / DC power meter 1 includes a hall element sensor 11, a current detection unit 12, a voltage detection unit 13, a power calculation unit 14, a control unit 15, a display unit 16, a notification output unit 17, and a storage unit 18. And a power supply unit 19 as main components. The configuration of each unit will be described below.

ホール素子センサ１１はコアに電力線Ｌ１が通され、電力線Ｌ１に流れる入力電流（直流電流成分又は交流電流成分の少なくとも何れか一方を含む）の電流値に応じた電圧信号を出力する。   The hall element sensor 11 has a power line L1 passed through the core, and outputs a voltage signal corresponding to a current value of an input current (including at least one of a direct current component and an alternating current component) flowing through the power line L1.

電流検出部１２は、ホール素子センサ１１の出力電圧をデジタル値に変換することによって、入力電流の電流値に応じた大きさの信号ｓ１を発生して電力演算部１４に出力する。   The current detection unit 12 converts the output voltage of the Hall element sensor 11 into a digital value, thereby generating a signal s1 having a magnitude corresponding to the current value of the input current and outputting the signal s1 to the power calculation unit 14.

電圧検出部１３は、電力線Ｌ１に印加された入力電圧をデジタル値に変換することによって、入力電圧の電圧値に応じた大きさの信号ｓ２を発生して電力演算部１４に出力する。   The voltage detection unit 13 converts the input voltage applied to the power line L1 into a digital value, thereby generating a signal s2 having a magnitude corresponding to the voltage value of the input voltage and outputting the signal s2 to the power calculation unit 14.

電力演算部１４は例えばマイクロコンピュータで構成され、電流検出部１２の出力信号ｓ１を直流電流成分に対応した直流電流信号ｓ３と交流電流成分に対応した交流電流信号ｓ４とに分離してそれぞれ出力する電流交直分離部１４ａと、電圧検出部１３の出力信号ｓ２を直流電圧成分に対応した直流電圧信号ｓ５と交流電圧成分に対応した交流電流信号ｓ６とに分離してそれぞれ出力する電圧交直分離部１４ｂと、電流交直分離部１４ａから出力される直流電流信号ｓ３と電圧交直分離部１４ｂから出力される直流電圧信号ｓ５とを用いて直流成分の電力値を算出する直流電力算出部１４ｃと、直流電力算出部１４ｃで算出された直流成分の電力値を積算して直流の電力量を求める直流電力積算部１４ｄと、電流交直分離部１４ａから出力される交流電流信号ｓ４と電圧交直分離部１４ｂから出力される交流電圧信号ｓ６とを用いて交流成分の電力値を算出する交流電力算出部１４ｅと、交流電力算出部１４ｅで算出された交流成分の電力値を積算して交流の電力量を求める交流電力積算部１４ｆとで構成される。尚、電流交直分離部１４ａ、電圧交直分離部１４ｂ、直流電力算出部１４ｃ、直流電力積算部１４ｄ、交流電力算出部１４ｅおよび交流電力積算部１４ｆは電力演算部１４を構成するマイクロコンピュータの演算機能によって実現され、電流交直分離部１４ａ及び電圧交直分離部１４ｂは例えばデジタルフィルタで構成される。   The power calculation unit 14 is configured by, for example, a microcomputer, and outputs the output signal s1 of the current detection unit 12 by separating the output signal s1 into a DC current signal s3 corresponding to a DC current component and an AC current signal s4 corresponding to an AC current component. The current AC / DC separator 14a and the voltage AC / DC separator 14b that outputs the output signal s2 from the voltage detector 13 into a DC voltage signal s5 corresponding to a DC voltage component and an AC current signal s6 corresponding to an AC voltage component, respectively. A DC power calculation unit 14c that calculates a DC component power value using the DC current signal s3 output from the current AC / DC separation unit 14a and the DC voltage signal s5 output from the voltage AC / DC separation unit 14b; DC power integrating unit 14d that calculates the amount of DC power by integrating the DC component power values calculated by calculating unit 14c, and output from current AC / DC separating unit 14a The AC power calculation unit 14e that calculates the power value of the AC component using the AC current signal s4 and the AC voltage signal s6 that is output from the voltage AC / DC separation unit 14b, and the AC component calculated by the AC power calculation unit 14e. It is comprised with the alternating current power integration part 14f which accumulate | stores an electric power value and calculates | requires the amount of alternating current power. The current AC / DC separation unit 14a, the voltage AC / DC separation unit 14b, the DC power calculation unit 14c, the DC power integration unit 14d, the AC power calculation unit 14e, and the AC power integration unit 14f are calculation functions of the microcomputer constituting the power calculation unit 14. The current AC / DC separation unit 14a and the voltage AC / DC separation unit 14b are configured by digital filters, for example.

制御部１５はマイクロコンピュータからなり、交直両用電力計１による計測動作を全般的に制御するとともに、電力演算部１４で算出された直流電力値、直流電力量、交流電力値、交流電力量を、例えば液晶ディスプレイからなる表示部１６に表示させる。   The control unit 15 is composed of a microcomputer, and generally controls the measurement operation by the AC / DC power meter 1, and the DC power value, DC power amount, AC power value, and AC power amount calculated by the power calculation unit 14 are converted into, for example, liquid crystal The image is displayed on the display unit 16 including a display.

記憶部１８には、電力線Ｌ１が直流電力を供給する直流電力線の場合に交流電力の流入が許容される交流成分の許容上限値や、電力線Ｌ１が交流電力を供給する交流電力線の場合に直流電力の流入が許容される直流成分の許容上限値が予め設定されている。   The storage unit 18 includes an allowable upper limit value of an AC component that allows AC power to flow when the power line L1 is a DC power line that supplies DC power, and DC power when the power line L1 is an AC power line that supplies AC power. An allowable upper limit value of the DC component that is allowed to flow in is preset.

本実施形態では電力線Ｌ１に交流電力と直流電力が重畳して配電されているが（交直ハイブリッド配電）、電力線Ｌ１が直流電力のみを配電する直流電力線の場合、制御部１５は、電力演算部１４から入力される交流成分の電力値と、記憶部１８に設定された交流成分の許容上限値との高低を比較し、電力演算部１４によって算出された交流成分の電力値が許容上限値を超えると、ブザーやＬＥＤを具備した報知装置４へ報知出力部１７から報知信号を出力させ、報知装置４によって許容上限値を超える交流成分が直流電力線に流入したことを音や光で報知させる。また、電力線Ｌ１が交流電力のみを配電する交流電力線の場合、制御部１５は、電力演算部１４から入力される直流成分の電力値と、記憶部１８に設定された直流成分の許容上限値との高低を比較し、電力演算部１４によって算出された直流成分の電力値が許容上限値を超えると、報知出力部１７から報知装置４へ報知信号を出力させ、報知装置４によって許容上限値を超える直流成分が交流電力線に流入したことを音や光で報知させる。ここに、制御部１５および報知出力部１７などから、直流電力線への交流電力の流入、或いは交流電力線への直流電力の流入を報知する報知部が構成される。尚、交直両用電力計１は一般的に分電盤の内部に設置されるので、報知装置４を電力計１と別体にして、報知装置４が発する音や光にユーザが気付きやすい場所に報知装置４を設置するのが好ましい。   In the present embodiment, AC power and DC power are distributed on the power line L1 (AC / DC hybrid distribution). However, when the power line L1 is a DC power line that distributes only DC power, the control unit 15 includes the power calculation unit 14. The power value of the alternating current component input from is compared with the allowable upper limit value of the alternating current component set in the storage unit 18, and the power value of the alternating current component calculated by the power calculating unit 14 exceeds the allowable upper limit value. Then, a notification signal is output from the notification output unit 17 to the notification device 4 provided with a buzzer or LED, and the notification device 4 notifies the sound power or light that an AC component exceeding the allowable upper limit value has flowed into the DC power line. In addition, when the power line L1 is an AC power line that distributes only AC power, the control unit 15 includes the power value of the DC component input from the power calculation unit 14, and the allowable upper limit value of the DC component set in the storage unit 18. When the power value of the DC component calculated by the power calculation unit 14 exceeds the allowable upper limit value, the notification output unit 17 outputs a notification signal to the notification device 4, and the notification device 4 sets the allowable upper limit value. The sound or light is used to notify that the excess DC component has flowed into the AC power line. Here, the control unit 15 and the notification output unit 17 constitute a notification unit that notifies the inflow of alternating current power to the direct current power line or the inflow of direct current power to the alternating current power line. In addition, since the AC / DC power meter 1 is generally installed inside the distribution board, the notification device 4 is separated from the watt meter 1 so that the user can easily notice the sound and light emitted by the notification device 4. It is preferable to install the notification device 4.

電源部１９は、電力線Ｌ１から入力される電圧を整流、平滑することによって、所定電圧値の直流電圧に変換し、交直両用電力計１の各部に動作電源を供給する。   The power supply unit 19 rectifies and smoothes the voltage input from the power line L <b> 1, thereby converting the voltage into a DC voltage having a predetermined voltage value, and supplies operating power to each unit of the AC / DC power meter 1.

ここで、交直両用電力計１による計測動作を図３のフローチャートにしたがって説明する。制御部１５は、所定の計測間隔が経過する毎に、電流検出部１２に対して電流信号の取り込みを指示する電流取込命令を出力するとともに、電圧検出部１３に対して電圧信号の取り込みを指示する電圧取込命令を出力する（図３のステップＳ１）。この時、電流検出部１２は、制御部１５からの電流取込命令に応じて、入力電流の電流値に応じた大きさの信号ｓ１を電力演算部１４に出力するとともに、電圧検出部１３が、制御部１５からの電圧取込命令に応じて、入力電圧の電圧値に応じた大きさの信号ｓ２を電力演算部１４に出力する（ステップＳ２）。   Here, the measurement operation by the AC / DC power meter 1 will be described with reference to the flowchart of FIG. The control unit 15 outputs a current capture command for instructing the current detection unit 12 to capture a current signal every time a predetermined measurement interval elapses, and captures a voltage signal to the voltage detection unit 13. An instructing voltage fetch command is output (step S1 in FIG. 3). At this time, the current detection unit 12 outputs a signal s1 having a magnitude corresponding to the current value of the input current to the power calculation unit 14 in response to a current capture command from the control unit 15, and the voltage detection unit 13 Then, in response to a voltage fetch command from the control unit 15, a signal s2 having a magnitude corresponding to the voltage value of the input voltage is output to the power calculation unit 14 (step S2).

ステップＳ１，Ｓ２で検出された信号が電力演算部１４に入力されると、電力演算部１４の電流交直分離部１４ａが、電流検出部１２から入力される信号ｓ１を、直流電流成分に対応した直流電流信号ｓ３と、交流電流成分に対応した交流電流信号ｓ４とに分離するとともに（ステップＳ３）、電圧交直分離部１４ｂが電圧検出部１３から入力される信号ｓ２を、直流電圧成分に対応した直流電圧信号ｓ５と、交流電圧成分に対応した交流電圧信号ｓ６とに分離する（ステップＳ４）。そして、直流電力算出部１４ｃが、電流交直分離部１４ａから出力される直流電流信号ｓ３（実効値）と、電圧交直分離部１４ｂから出力される直流電圧信号ｓ５（実効値）との積を演算することによって、直流成分の電力値を算出して制御部１５に出力するとともに（ステップＳ５）、交流電力算出部１４ｅが、電流交直分離部１４ａから出力される交流電流信号ｓ４（実効値）と、電圧交直分離部１４ｂから出力される交流電圧信号ｓ６（実効値）との積を演算することによって、交流成分の電力値を算出して制御部１５に出力する（ステップＳ６）。また、直流成分及び交流成分の電力値が算出されると、直流電力積算部１４ｄが、直流成分の電力値を積算することによって電力量を算出し、直流電力量の算出結果を制御部１５に出力するとともに、交流電力積算部１４ｆが、交流成分の電力値を積算することによって電力量を算出し、交流電力量の算出結果を制御部１５に出力する（ステップＳ７）。   When the signals detected in steps S1 and S2 are input to the power calculation unit 14, the current AC / DC separation unit 14a of the power calculation unit 14 corresponds the signal s1 input from the current detection unit 12 to the DC current component. The DC current signal s3 and the AC current signal s4 corresponding to the AC current component are separated (step S3), and the voltage AC / DC separation unit 14b converts the signal s2 input from the voltage detection unit 13 to the DC voltage component. The DC voltage signal s5 and the AC voltage signal s6 corresponding to the AC voltage component are separated (step S4). Then, the DC power calculation unit 14c calculates the product of the DC current signal s3 (effective value) output from the current AC / DC separation unit 14a and the DC voltage signal s5 (effective value) output from the voltage AC / DC separation unit 14b. As a result, the power value of the DC component is calculated and output to the control unit 15 (step S5), and the AC power calculation unit 14e is connected to the AC current signal s4 (effective value) output from the current AC / DC separation unit 14a. Then, by calculating the product of the AC voltage signal s6 (effective value) output from the voltage AC / DC separator 14b, the power value of the AC component is calculated and output to the controller 15 (step S6). When the DC component and the AC component power value are calculated, the DC power integrating unit 14d calculates the amount of power by integrating the DC component power value, and outputs the calculation result of the DC power amount to the control unit 15. At the same time, the AC power integration unit 14f calculates the amount of power by integrating the power values of the AC components, and outputs the calculation result of the AC power amount to the control unit 15 (step S7).

制御部１５は、電力演算部１４から直流電力値、直流電力量、交流電力値、交流電力量の測定結果が入力されると、これらの測定結果を記憶部１８に記憶させるとともに（ステップＳ８）、これらの測定結果を表示部１６に表示させる（ステップＳ９）。   When the DC power value, the DC power amount, the AC power value, and the AC power amount measurement results are input from the power calculation unit 14, the control unit 15 stores the measurement results in the storage unit 18 (step S8). Is displayed on the display unit 16 (step S9).

次に、制御部１５は、測定対象の電力線が、直流電力のみを配電する直流電力線、又は、交流電力のみを配電する交流電力線の何れかに該当するかを判定する（ステップＳ１０）。交直両用電力計１には、図示しない設定スイッチにより測定対象の電力線Ｌ１が、直流電力と交流電力を重畳して配電する交直ハイブリッド電力線か、直流電力のみを配電する直流電力線か、交流電力のみを配電する交流電力線の何れであるかが設定されるようになっている。本実施形態では電力線Ｌ１が直流電力線、交流電力線の何れにも該当しないので（電力線Ｌ１は、直流電力と交流電力を重畳して配電する交直ハイブリッド電力線）、制御部１５は計測処理を終了する。   Next, the control unit 15 determines whether the power line to be measured corresponds to either a DC power line that distributes only DC power or an AC power line that distributes only AC power (step S10). In the AC / DC power meter 1, the power line L1 to be measured is set to an AC / DC hybrid power line in which DC power and AC power are superimposed by a setting switch (not shown), or a DC power line that distributes only DC power, or only AC power. Which AC power line is to be distributed is set. In the present embodiment, the power line L1 does not correspond to either a DC power line or an AC power line (the power line L1 is an AC / DC hybrid power line that superimposes and distributes DC power and AC power), and the control unit 15 ends the measurement process.

一方、ステップＳ１０の判定で電力線Ｌ１が直流電力のみを配電する直流電力線と判定された場合、制御部１５は、電力演算部１４から入力された交流成分の電力値と記憶部１８に予め設定された交流電力の許容上限値との高低を比較し（ステップＳ１１）、交流成分の電力値が許容上限値を越えていれば、報知出力部１７から報知装置４へ報知信号を出力させ、報知装置４によって直流電力線に許容上限値を越える電力の交流電力が流入したことを報知させた後（ステップＳ１２）、測定処理を終了する。   On the other hand, when it is determined in step S10 that the power line L1 is a DC power line that distributes only DC power, the control unit 15 is preset with the power value of the AC component input from the power calculation unit 14 and the storage unit 18. If the AC component power value exceeds the allowable upper limit value, a notification signal is output from the notification output unit 17 to the notification device 4, and the notification device is set. After informing that the AC power of the power exceeding the allowable upper limit value has flowed into the DC power line by 4 (step S12), the measurement process is terminated.

また、ステップＳ１０の判定で電力線Ｌｌが交流電力のみを配電する交流電力線と判定された場合、制御部１５は、電力演算部１４から入力された直流成分の電力値と記憶部１８に予め設定された直流電力の許容上限値との高低を比較し（ステップＳ１３）、直流成分の電力値が許容上限値を越えていれば、報知出力部１７から報知装置４へ報知信号を出力させ、報知装置４によって交流配電線に許容上限値を越える電力の直流電力が流入したことを報知させた後（ステップＳ１４）、測定処理を終了する。尚、ステップＳ１１，Ｓ１３の判定で、交流成分の電力値又は直流成分の電力値が許容上限値を越えていないと判定された場合、制御部１５は報知動作を行うことなく、測定処理を終了する。   Further, when it is determined in step S10 that the power line Ll is an AC power line that distributes only AC power, the control unit 15 is preset in the storage unit 18 with the power value of the DC component input from the power calculation unit 14. If the power value of the DC component exceeds the allowable upper limit value, the notification output unit 17 outputs a notification signal to the notification device 4, and the notification device 4 After informing that the DC power of the power exceeding the allowable upper limit value has flowed into the AC distribution line by 4 (step S14), the measurement process is terminated. When it is determined in steps S11 and S13 that the AC component power value or the DC component power value does not exceed the allowable upper limit value, the control unit 15 ends the measurement process without performing the notification operation. To do.

以上説明したように、本実施形態の交直両用電力計１では、電流交直分離部１４ａが電力線Ｌ１に流れる電流の直流電流成分に対応した直流電流信号ｓ３と交流電流成分に対応した交流電流信号ｓ４とを分離して出力するとともに、電圧交直分離部１４ｂが電力線Ｌ１に印加される電圧の直流電圧成分に対応した直流電圧信号ｓ５と交流電圧成分に対応した交流電圧信号ｓ６とを分離して出力しており、直流電力算出部１４ｃが、直流電流信号ｓ３および直流電圧信号ｓ５から直流成分の電力値を算出し、交流電力算出部１４ｅが、交流電流信号ｓ４および交流電圧信号ｓ６から交流成分の電力値を算出しているので、１台の電力計１で直流電力と交流電力の両方を測定することができる。しかも、直流電力積算部１４ｄが、直流成分の電力値を積算することによって直流の電力量を求めるとともに、交流電力積算部１４ｆが、交流成分の電力値を積算することによって交流の電力量を求めているので、１台の電力計で直流の電力量および交流の電力量を両方共に測定することができる。   As described above, in the AC / DC power meter 1 of the present embodiment, the DC / DC separation unit 14a has the DC current signal s3 corresponding to the DC current component of the current flowing through the power line L1 and the AC current signal s4 corresponding to the AC current component. And the AC / DC separator 14b separates and outputs the DC voltage signal s5 corresponding to the DC voltage component of the voltage applied to the power line L1 and the AC voltage signal s6 corresponding to the AC voltage component. The DC power calculation unit 14c calculates the DC component power value from the DC current signal s3 and the DC voltage signal s5, and the AC power calculation unit 14e calculates the AC component from the AC current signal s4 and the AC voltage signal s6. Since the power value is calculated, it is possible to measure both DC power and AC power with one wattmeter 1. In addition, the DC power integrating unit 14d calculates the DC power amount by integrating the DC component power values, and the AC power integrating unit 14f calculates the AC power amount by integrating the AC component power values. Therefore, it is possible to measure both the DC power amount and the AC power amount with one wattmeter.

また、測定対象の電力線が直流電力線の場合に、交流電力算出部１４ｅによって算出された交流電力値が許容上限値を越えると、報知出力部１７から報知装置４へ報知信号を出力して報知動作を行わせているので、直流電力線に許容上限値を越える電力値の交流成分が流入したことをユーザに知らしめることができる。   Also, when the power line to be measured is a DC power line, if the AC power value calculated by the AC power calculation unit 14e exceeds the allowable upper limit value, a notification signal is output from the notification output unit 17 to the notification device 4 and a notification operation is performed. Therefore, the user can be informed that an AC component having a power value exceeding the allowable upper limit value has flowed into the DC power line.

また、測定対象の電力線が交流電力線の場合に、直流電力算出部１４ｃによって算出された直流電力値が許容上限値を越えると、報知出力部１７から報知装置４へ報知信号を出力して報知動作を行わせているので、交流電力線に許容上限値を越える電力値の直流成分が流入したことをユーザに知らしめることができる。   Further, when the power line to be measured is an AC power line, if the DC power value calculated by the DC power calculation unit 14c exceeds the allowable upper limit value, a notification signal is output from the notification output unit 17 to the notification device 4 and a notification operation is performed. Therefore, the user can be informed that a DC component having a power value exceeding the allowable upper limit value has flowed into the AC power line.

１ 交直両用電力計
１１ ホール素子センサ
１２ 電流検出部
１３ 電圧検出部
１４ 電力演算部
１４ａ 電流交直分離部
１４ｂ 電圧交直分離部
１４ｃ 直流電力算出部
１４ｄ 直流電力積算部
１４ｅ 交流電力算出部
１４ｆ 交流電力積算部
Ｌ１ 電力線 DESCRIPTION OF SYMBOLS 1 AC / DC power meter 11 Hall element sensor 12 Current detection part 13 Voltage detection part 14 Power calculation part 14a Current AC / DC separation part 14b Voltage AC / DC separation part 14c DC power calculation part 14d DC power integration part 14e AC power calculation part 14f AC power integration Part L1 Power line

Claims (4)

電力線に流れる、直流電流成分又は交流電流成分の少なくとも何れか一方を含む入力電流の電流値に応じた大きさの信号を出力する電流検出部と、電流検出部から出力される信号を、直流電流成分に対応した直流電流信号と交流電流成分に対応した交流電流信号とに分離して出力する電流交直分離部と、前記電力線に印加される、直流電圧成分又は交流電圧成分の少なくとも何れか一方を含む入力電圧の電圧値に応じた大きさの信号を出力する電圧検出部と、電圧検出部から出力される信号を、直流電圧成分に対応した直流電圧信号と交流電圧成分に対応した交流電圧信号とに分離して出力する電圧交直分離部と、電流交直分離部から出力される直流電流信号および電圧交直分離部から出力される直流電圧信号より直流成分の電力値を算出する直流電力算出部と、電流交直分離部から出力される交流電流信号および電圧交直分離部から出力される交流電圧信号より交流成分の電力値を算出する交流電力算出部とを備えたことを特徴とする交直両用電力計。   A current detection unit that outputs a signal having a magnitude corresponding to a current value of an input current including at least one of a direct current component and an alternating current component flowing through the power line, and a signal output from the current detection unit A current AC / DC separation unit that separates and outputs a direct current signal corresponding to a component and an alternating current signal corresponding to an alternating current component, and at least one of a direct current voltage component or an alternating voltage component applied to the power line. A voltage detection unit that outputs a signal having a magnitude corresponding to the voltage value of the input voltage, and a signal output from the voltage detection unit, a DC voltage signal corresponding to a DC voltage component and an AC voltage signal corresponding to an AC voltage component The power value of the DC component is calculated from the voltage AC / DC separator that is output separately and the DC current signal output from the current AC / DC separator and the DC voltage signal output from the voltage AC / DC separator. A DC power calculation unit, and an AC power calculation unit that calculates an AC component power value from an AC current signal output from the current AC / DC separation unit and an AC voltage signal output from the voltage AC / DC separation unit, AC / DC power meter. 前記直流電力算出部が算出した直流成分の電力値を積算して直流の電力量を求める直流電力積算部と、前記交流電力算出部が算出した交流成分の電力値を積算して交流の電力量を求める交流電力積算部とを備えたことを特徴とする請求項１記載の交直両用電力計。   A DC power integrating unit that calculates the DC power amount by integrating the DC component power values calculated by the DC power calculating unit, and an AC power amount by integrating the AC component power values calculated by the AC power calculating unit. The AC / DC power meter according to claim 1, further comprising an AC power integrating unit that calculates the power. 前記電力線は直流電力を配電する直流電力線であり、前記交流電力算出部が算出した交流成分の電力値が所定の許容上限値を超えると、交流電力の流入を報知する報知部を備えたことを特徴とする請求項１記載の交直両用電力計。   The power line is a direct-current power line that distributes direct-current power, and includes a notification unit that notifies the inflow of alternating-current power when the power value of the alternating-current component calculated by the alternating-current power calculation unit exceeds a predetermined allowable upper limit value. 2. The AC / DC power meter according to claim 1, wherein 前記電力線は交流電力を配電する交流電力線であり、前記直流電力算出部が算出した直流成分の電力値が所定の許容上限値を超えると、直流電力の流入を報知する報知部を備えたことを特徴とする請求項１記載の交直両用電力計。   The power line is an AC power line that distributes AC power, and includes a notification unit that notifies inflow of DC power when the DC component power value calculated by the DC power calculation unit exceeds a predetermined allowable upper limit value. 2. The AC / DC power meter according to claim 1, wherein
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CN102830278A (en) * 2012-09-05 2012-12-19 茂硕电源科技股份有限公司 Power factor detection circuit
CN103076491A (en) * 2013-01-10 2013-05-01 浙江中碳科技有限公司 AC-DC (Alternating current-Direct current) universal power supply line detection method and circuit as well as device
CN104081214A (en) * 2012-02-13 2014-10-01 松下电器产业株式会社 Power measuring apparatus
CN108375696A (en) * 2018-03-26 2018-08-07 珠海格力电器股份有限公司 Power Quality Monitor Device and method, electric energy meter
CN111051895A (en) * 2017-07-14 2020-04-21 特克特朗尼克公司 System, apparatus and method for measuring DC/low frequency signal components
KR102120053B1 (en) * 2018-12-07 2020-06-17 주식회사 남전사 AC and DC combination Watt hour meter

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Publication number Priority date Publication date Assignee Title
CN104081214A (en) * 2012-02-13 2014-10-01 松下电器产业株式会社 Power measuring apparatus
CN102830278A (en) * 2012-09-05 2012-12-19 茂硕电源科技股份有限公司 Power factor detection circuit
CN103076491A (en) * 2013-01-10 2013-05-01 浙江中碳科技有限公司 AC-DC (Alternating current-Direct current) universal power supply line detection method and circuit as well as device
CN103076491B (en) * 2013-01-10 2015-10-28 浙江中碳科技有限公司 Supply line's detection method of AC/DC universal and testing circuit
CN111051895A (en) * 2017-07-14 2020-04-21 特克特朗尼克公司 System, apparatus and method for measuring DC/low frequency signal components
CN108375696A (en) * 2018-03-26 2018-08-07 珠海格力电器股份有限公司 Power Quality Monitor Device and method, electric energy meter
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KR102120053B1 (en) * 2018-12-07 2020-06-17 주식회사 남전사 AC and DC combination Watt hour meter

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