JP2019078737A - Device and method for measuring high voltage conductive wire current - Google Patents
Device and method for measuring high voltage conductive wire current Download PDFInfo
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Abstract
Description
本発明は高圧導線電流の測定装置及び測定方法に関わる。 The present invention relates to an apparatus and method for measuring high voltage lead current.
従来技術において、高圧導線電流の測定は高圧電流変成器を利用して磁気を電流に転換する方式を採用しているが、高圧電流測定に使われる高圧電流変成器の体積が数立方メートルで、重量がトン以上、コストが数百万円の場合が多く、且つ、それの電流測定結果をチェックするために、作業員は高いところに上る必要があるので、従来高圧導線電流の測定方式としては、コストが高く、作業員の安全が保障できない、測定操作が面倒であるという欠点を持っている。 In the prior art, the measurement of high voltage lead current adopts a method of converting magnetism to current using high voltage current transformer, but the volume of high voltage current transformer used for high voltage current measurement is several cubic meters, weight Is more than a ton, and the cost is several million yen in many cases, and it is necessary for workers to go high to check the current measurement results. The cost is high, the safety of the workers can not be guaranteed, and the measurement operation is troublesome.
背景技術に説明した技術問題を克服するため、本発明は高圧導線電流の測定装置及び測定方法を提供する。 SUMMARY OF THE INVENTION In order to overcome the technical problems described in the background art, the present invention provides an apparatus and method for measuring high voltage lead current.
本発明が技術問題を解決するため採用する技術案は以下である。 The technical solutions adopted by the present invention to solve the technical problems are as follows.
高圧導線電流の測定装置は電流変成器、整流調整電気回路、多段演算増幅電気回路、検波電気回路、アナログ−デジタル変換電気回路及び表示電気回路を含む。 The measuring device of the high voltage lead current includes a current transformer, a rectification adjustment circuit, a multistage operational amplification circuit, a detection circuit, an analog-digital conversion circuit and a display circuit.
前記電流変成器が高圧導線に取り付けられ且つそれの出力端子が整流調整電気回路と接続され、整流調整電気回路で整流且つ安定化されてから、多段演算増幅電気回路に給電する第一直流給電電圧と、表示電気回路に給電する第二直流給電電圧を取得する。 The first DC feed for feeding the multistage operational amplification electric circuit after the current transformer is attached to the high voltage conductor and the output terminal thereof is connected with the rectification adjustment electric circuit and rectified and stabilized by the rectification adjustment electric circuit A voltage and a second DC feed voltage for feeding the display circuitry are obtained.
サンプリング導線の両端の電圧が多段演算増幅電気回路の入力端子に入力され、多段演算増幅電気回路で拡大されて検波電気回路に出力し、検波電気回路で検波されて前記サンプリング導線の両端の電圧値を取得し、前記電圧値をアナログ−デジタル変換電気回路に出力し、前記アナログ−デジタル変換電気回路で前記電圧を高圧導線電流値に転換し、且つ表示電気回路に接続されて前記高圧導線の電流値を表示する。前記サンプリング導線は一定の長さの電圧導線である。 The voltage at both ends of the sampling lead is input to the input terminal of the multistage operational amplification electric circuit, expanded by the multistage operational amplification electric circuit, output to the detection electric circuit, detected by the detection electric circuit, and the voltage value at both ends of the sampling lead , The voltage value is output to an analog-digital conversion circuit, the voltage is converted into a high voltage lead current value by the analog-digital conversion circuit, and the current of the high voltage line is connected to a display circuit. Display the value. The sampling lead is a voltage lead of a fixed length.
好ましい実施形態において、さらに信号発信装置及び地上受信装置を含み、前記信号発信装置がアナログ−デジタル変換電気回路と接続され且つ地上受信装置と無線通信接続又は光ケーブル通信接続されることで、前記電流値を地上受信装置に発送する。 In a preferred embodiment, the electric current value further includes a signal transmission device and a ground reception device, wherein the signal transmission device is connected with an analog-digital conversion electric circuit and wirelessly connected or optical cable connected with the ground reception device. On the ground receiver.
好ましい実施形態において、前記整流調整電気回路はコンデンサＣ１、コンデンサＣ２、コンデンサＣ３、二極管Ｄ１、二極管Ｄ２、ツェナーダイオードＤ３、ツェナーダイオードＤ４、ツェナーダイオードＤ５と抵抗Ｒ１を含む。 In a preferred embodiment, the rectification and adjustment circuit includes a capacitor C1, a capacitor C2, a capacitor C3, a double tube D1, a double tube D2, a zener diode D3, a zener diode D4, a zener diode D5 and a resistor R1.
電流変成器の一端がコンデンサＣ１の一端と接続され、コンデンサＣ１のもう一端が二極管Ｄ１の陽極と接続され、二極管Ｄ１の陰極を並列連結しているコンデンサＣ２とツェナーダイオードＤ３と接続して多段演算増幅電気回路に給電する第一直流給電電圧の正電圧を生成する。 One end of the current transformer is connected to one end of the capacitor C1, the other end of the capacitor C1 is connected to the anode of the double tube D1, and the capacitor C2 connecting the cathode of the double tube D1 in parallel is connected to the zener diode D3 to perform multistage operation A positive voltage of a first DC feed voltage for feeding an amplification circuit is generated.
電流変成器のもう一端が二極管Ｄ２の陰極と接続され、二極管Ｄ２の陽極を並列連結しているコンデンサＣ３とツェナーダイオードＤ４と接続して多段演算増幅電気回路に給電する第一直流給電電圧の負電圧を生成する。 The other end of the current transformer is connected to the cathode of the diode D2, and the capacitor C3 and the Zener diode D4 are connected in parallel to connect the anode of the diode D2 to supply the multistage operational amplifier electric circuit Generate a negative voltage.
直列後のツェナーダイオードＤ５と抵抗Ｒ１をツェナーダイオードＤ３の両端と並列接続し、前記ツェナーダイオードＤ５両端の電圧が表示電気回路に給電する第二直流給電電圧を形成する。 The series-connected Zener diode D5 and the resistor R1 are connected in parallel with both ends of the Zener diode D3, and the voltage at both ends of the Zener diode D5 forms a second DC feed voltage for feeding the display electric circuit.
好ましい実施形態において、前記多段演算増幅電気回路は四つの演算増幅器を含み、それぞれ第一演算増幅器、第二演算増幅器、第三演算増幅器と第四演算増幅器である。 In a preferred embodiment, the multistage operational amplifier circuit includes four operational amplifiers, which are a first operational amplifier, a second operational amplifier, a third operational amplifier and a fourth operational amplifier, respectively.
サンプリング導線の端子電圧の正出力端子が抵抗Ｒ２、Ｒ３の一端と接続され、抵抗Ｒ２のもう一端を地面に結びつけ、抵抗Ｒ３のもう一端と抵抗Ｒ５の一端が第一演算増幅器の正相入力端子と接続され、抵抗Ｒ５のもう一端を地面に結びつけ、第一演算増幅器の出力端子が抵抗Ｒ６とコンデンサＣ４の一端と接続され、抵抗Ｒ６のもう一端と抵抗Ｒ４の一端が第一演算増幅器の反転入力端子と接続され、抵抗Ｒ４のもう一端を地面に結びつける。 The positive output terminal of the terminal voltage of the sampling lead is connected to one end of the resistors R2 and R3, the other end of the resistor R2 is connected to the ground, and the other end of the resistor R3 and one end of the resistor R5 are positive phase input terminals of the first operational amplifier , The other end of the resistor R5 is connected to the ground, the output terminal of the first operational amplifier is connected to the resistor R6 and one end of the capacitor C4, and the other end of the resistor R6 and one end of the resistor R4 are the inversion of the first operational amplifier It is connected to the input terminal and ties the other end of the resistor R4 to the ground.
コンデンサＣ４のもう一端が第二演算増幅器の正相入力端子と抵抗Ｒ８の一端と接続され、抵抗Ｒ８のもう一端を地面に結びつけ、第二演算増幅器の出力端子が抵抗Ｒ９とコンデンサＣ５の一端と接続され、抵抗Ｒ９のもう一端と抵抗Ｒ７の一端が第二演算増幅器の反転入力端子と接続され、抵抗Ｒ７のもう一端を地面に結びつける。 The other end of the capacitor C4 is connected to the positive phase input terminal of the second operational amplifier and one end of the resistor R8, the other end of the resistor R8 is connected to the ground, and the output terminal of the second operational amplifier is the resistor R9 and one end of the capacitor C5. The other end of the resistor R9 and one end of the resistor R7 are connected to the inverting input terminal of the second operational amplifier, and the other end of the resistor R7 is connected to the ground.
コンデンサＣ５のもう一端が第三演算増幅器の正相入力端子と抵抗Ｒ１０の一端と接続され、抵抗Ｒ１０のもう一端を地面に結びつけ、第三演算増幅器の出力端子が抵抗Ｒ１１とコンデンサＣ６の一端と接続され、抵抗Ｒ１１のもう一端と抵抗Ｒ２０の一端が第三演算増幅器の反転入力端子と接続され、抵抗Ｒ２０のもう一端を地面に結びつける。 The other end of the capacitor C5 is connected to the positive phase input terminal of the third operational amplifier and one end of the resistor R10, the other end of the resistor R10 is connected to the ground, and the output terminal of the third operational amplifier is the resistor R11 and one end of the capacitor C6 The other end of the resistor R11 and one end of the resistor R20 are connected to the inverting input terminal of the third operational amplifier, and the other end of the resistor R20 is connected to the ground.
コンデンサＣ６のもう一端が第四演算増幅器の正相入力端子と抵抗Ｒ１２の一端と接続され、抵抗Ｒ１２のもう一端を地面に結びつけ、第四演算増幅器の出力端子がコンデンサＣ７と抵抗Ｒ１３の一端と接続され、抵抗Ｒ１３のもう一端と抵抗Ｒ２１の一端が第四演算増幅器の反転入力端子と接続され、抵抗Ｒ２１のもう一端を地面に結びつけ、コンデンサＣ７のもう一端が検波電気回路と接続される。 The other end of the capacitor C6 is connected to the positive phase input terminal of the fourth operational amplifier and one end of the resistor R12, the other end of the resistor R12 is connected to the ground, and the output terminal of the fourth operational amplifier is connected to the capacitor C7 and one end of the resistor R13. The other end of the resistor R13 and one end of the resistor R21 are connected to the inverting input terminal of the fourth operational amplifier, the other end of the resistor R21 is connected to the ground, and the other end of the capacitor C7 is connected to the detection circuit.
好ましい実施形態において、前記検波電気回路はコンデンサＣ７、二極管Ｄ６、二極管Ｄ７、抵抗Ｒ１６、抵抗Ｒ１５、コンデンサＣ９、コンデンサＣ８、抵抗Ｒ１４、抵抗Ｒ１７、抵抗Ｒ１８、ポテンショメータＲｐを含む。 In a preferred embodiment, the detection circuit includes a capacitor C7, a double-pole tube D6, a double-pole tube D7, a resistor R16, a resistor R15, a capacitor C9, a capacitor C8, a resistor R14, a resistor R17, a resistor R18, and a potentiometer Rp.
二極管Ｄ６の陰極が抵抗Ｒ１５、コンデンサＣ８の一端と接続され、二極管Ｄ７の陰極が抵抗Ｒ１６、コンデンサＣ９の一端と接続され、二極管Ｄ７の陽極、抵抗Ｒ１６、コンデンサＣ９のもう一端及び二極管Ｄ６の陽極、抵抗Ｒ１５、コンデンサＣ８のもう一端が共点接続を形成し、前記二極管Ｄ６、抵抗Ｒ１５、コンデンサＣ８から正検波整流電気回路を構成し、前記二極管Ｄ７、抵抗Ｒ１６、コンデンサＣ９から負検波整流電気回路を構成する。 The cathode of diode D6 is connected to resistor R15, one end of capacitor C8, the cathode of diode D7 is connected to resistor R16, one end of capacitor C9, the anode of diode D7, resistor R16, the other end of capacitor C9, and the anode of diode D6. The other end of the resistor R15 and the capacitor C8 form a point connection, and the diode D6, the resistor R15 and the capacitor C8 constitute a positive detection rectification electric circuit, and the diode R7 and the capacitor C9 form a negative detection rectifier Configure the circuit.
前記共点は抵抗Ｒ１４を通して地面に結びつけ、正検波整流後の出力が抵抗Ｒ１７に接続されてからポテンショメータＲｐの一端と接続され、Ｒｐのもう一端を抵抗Ｒ１８で地面と結びつけ、ポテンショメータＲｐの中間タップによって伝達された電圧値を前記高圧電流導線の電流値と一致するように調整した後アナログ−デジタル変換電気回路に提供する。 The same point is connected to the ground through the resistor R14, and the output after positive detection rectification is connected to the resistor R17 and then to one end of the potentiometer Rp, the other end of Rp is connected to the ground with the resistor R18, and the center tap of the potentiometer Rp The voltage value transmitted by the voltage control circuit is adjusted to match the current value of the high voltage current line and provided to an analog-digital conversion circuit.
好ましい実施形態において、前記多段演算増幅電気回路は二つのＬＭ３５８二重演算増幅器を含む。 In a preferred embodiment, the multistage operational amplifier circuit comprises two LM358 dual operational amplifiers.
好ましい実施形態において、前記第一直流給電電圧は±５Ｖであり、前記第二直流給電電圧は２．５Ｖである。 In a preferred embodiment, the first DC feed voltage is ± 5V and the second DC feed voltage is 2.5V.
高圧導線電流の測定方法は、一定の長さの高圧導線を選択し、サンプリング導線両端の電圧が多段演算増幅電気回路の入力端子と接続され、多段演算増幅電気回路で拡大されてから検波電気回路に出力し、検波電気回路によって前記サンプリング導線両端の電圧値を取得し、前記電圧値をアナログ−デジタル変換電気回路に出力し、アナログ−デジタル変換電気回路で前記電圧値を高圧導線の電流値に転換させ、且つ表示電気回路と接続されて前記高圧導線の電流値を表示する。 The method of measuring the high voltage lead current is to select a high voltage lead of a certain length, the voltage across the sampling lead is connected to the input terminal of the multistage operational amplifier electric circuit, and the detection electric circuit is expanded by the multistage operational amplifier electric circuit. , And the voltage value at both ends of the sampling wire is acquired by the detection circuit, the voltage value is output to the analog-digital conversion circuit, and the voltage value is converted to the current value of the high voltage wire by the analog-digital conversion circuit. It is converted and connected to a display electric circuit to display the current value of the high voltage line.
高圧導線に取り付けられた電流変成器の出力端子が整流調整電気回路と接続され、整流調整電気回路で整流且つ安定化されてから、多段演算増幅電気回路に給電する第一直流給電電圧と、表示電気回路に給電する第二直流給電電圧を取得する。 A first DC supply voltage for supplying a multistage operational amplification electric circuit after the output terminal of the current transformer attached to the high voltage conductor is connected to the rectification adjustment electric circuit and rectified and stabilized by the rectification adjustment electric circuit; A second DC feed voltage is provided to power the display circuitry.
好ましい実施形態において、前記高圧導線の電流値を信号発信装置及び地面接地装置を通して、地上受信装置に発信する。 In a preferred embodiment, the current value of the high voltage line is transmitted to the ground receiver through a signal transmitter and a ground terminal.
本技術は背景技術と比べ、以下のメリットがある。 The present technology has the following advantages over the background art.
１.本発明はサンプリング導線両端の抵抗値を直接取得し、且つ、前記サンプリング導線から得る電圧値により、オームの法則に基づき、高圧導線の電流値を取得する。測定方法は高圧電流変成器で磁気を電流に転換して電流値を得る方式を採用しなくても良いので、測定方法がもっと簡単で、コストがもっと低い。 1. The present invention directly obtains the resistance value at both ends of the sampling wire, and obtains the current value of the high voltage wire based on the Ohm's law from the voltage value obtained from the sampling wire. Since the measurement method does not have to adopt a method of converting magnetism into current to obtain a current value in a high voltage current transformer, the measurement method is simpler and the cost is lower.
２、本発明は多段演算増幅器を使って接続されたサンプリング導線の両端の電圧を拡大し、それの拡大倍数は十分大きい（２００マイクロマイクロボルトレベルの信号を２ボルト近くに拡大する）ので、高圧導線上の極小さい導線電流でも本発明によって直接測定でき、拡大倍数が大きいので、測定するのに必要な高圧導線の断面積を大きくすることができ、負荷量を大きくすることができ、温度効果を相応に減少することができる。 2. The present invention expands the voltage across the sampling leads connected using multistage operational amplifiers, the magnification factor of which is large enough (the signal at 200 micro-microvolt level is expanded to near 2 volts), so high voltage Because even the smallest lead current on the lead can be measured directly by the present invention and the magnification factor is large, the cross-sectional area of the high-voltage lead necessary to make the measurement can be increased, the load can be increased, and the temperature effect Can be reduced accordingly.
３、本発明は電流変成器を使って高圧導線上の電気信号を取得し、それによって、多段演算増幅電気回路と表示電気回路に給電する電源電圧に転換する。ここで利用する電流変成器はただ高圧導線上の電子信号を取得すればよく、体積や重量の小さい電流変成器を利用して電気を取得し給電することができるので、本発明装置の全体の電気回路の構造が簡単になり、コストが下がる。 3. The present invention uses a current transformer to acquire the electrical signal on the high voltage line, thereby converting it to a supply voltage that feeds the multistage operational amplifier circuitry and the display circuitry. The current transformer used here only needs to acquire an electronic signal on a high voltage wire, and electricity can be acquired and fed using a current transformer with small volume and weight, so that the entire device of the present invention can be obtained. The structure of the electrical circuit is simplified and the cost is reduced.
４、本発明は信号発信装置と地上受信装置を設置することにより、高空の高圧導線で測定した電流信号を地上に発信し、高いところに登って測定電流をチェックする必要がなくなり、人員の作業安全性を高くすることができる。
4. By installing a signal transmission device and a ground receiver, the present invention transmits current signals measured by high voltage conductors in high altitudes to the ground, and it is not necessary to climb to a high place and check the measured current. Security can be increased.
以下は図と実施例を組み合わせて本発明の更なる説明を行う。 In the following, the invention will be further described by combining the figures and examples.
図１と図２に示すように、高圧導線電流の測定装置は電流変成器１、整流調整電気回路２、多段演算増幅電気回路３、検波電気回路４、アナログ−デジタル変換電気回路５、表示電気回路６、信号発信装置７及び地上受信装置８を含む。 As shown in FIG. 1 and FIG. 2, the measuring device of the high voltage lead current is a current transformer 1, a rectification adjustment electric circuit 2, a multistage operational amplification electric circuit 3, a detection electric circuit 4, an analog-digital conversion electric circuit 5, a display electricity The circuit 6 includes a signal transmitter 7 and a ground receiver 8.
前記整流調整電気回路２はコンデンサＣ１、コンデンサＣ２、コンデンサＣ３、二極管Ｄ１、二極管Ｄ２、ツェナーダイオードＤ３、ツェナーダイオードＤ４、ツェナーダイオードＤ５と抵抗Ｒ１を含む。電流変成器の一端がコンデンサＣ１の一端と接続され、Ｃ１のもう一端が二極管Ｄ１の陽極と接続され、二極管Ｄ１の陰極を並列連結しているコンデンサＣ２とツェナーダイオードＤ３と接続されて多段演算増幅電気回路に給電する第一直流給電電圧の正電圧を形成する。電流変成器１のもう一端が二極管Ｄ２の陰極と接続され、二極管Ｄ２の陽極を並列連結しているコンデンサＣ３とツェナーダイオードＤ４と接続されて多段演算増幅電気回路に給電する第一直流給電電圧の負電圧を生成し、コンデンサＣ１と電流変成器の共振により、出力された電圧を第一直流給電電圧の正負電圧の範囲内に安定化させ、二極管Ｄ１と二極管Ｄ２を通して正負電圧に対し、正電圧と負電圧の整流を行う。直列後のツェナーダイオードＤ５と抵抗Ｒ１がツェナーダイオードＤ３の両端と並列接続され、前記ツェナーダイオードＤ５両端の電圧が表示電気回路に電気を提供する第二直流給電電圧を形成する。この実施例において、前記第一直流給電電圧は±５Ｖであり、前記第二直流給電電圧は２．５Ｖである。 The rectification adjustment circuit 2 includes a capacitor C1, a capacitor C2, a capacitor C3, a double tube D1, a double tube D2, a zener diode D3, a zener diode D4, a zener diode D5 and a resistor R1. One end of the current transformer is connected to one end of the capacitor C1, the other end of C1 is connected to the anode of the double tube D1, and the capacitor C2 and zener diode D3 are connected in parallel to connect the cathodes of the double tube D1. A positive voltage of a first DC feed voltage for feeding an electrical circuit is formed. The other end of the current transformer 1 is connected to the cathode of the double-pole tube D2, and a capacitor C3 and a Zener diode D4 are connected in parallel to connect the anode of the double-pole tube D2 to feed a multistage operational amplifier electric circuit. The capacitor C1 and the current transformer resonate to stabilize the output voltage within the range of positive and negative voltages of the first DC power supply voltage, and to the positive and negative voltages through the diode D1 and the diode D2, Rectify positive and negative voltages. The series-connected Zener diode D5 and the resistor R1 are connected in parallel with both ends of the Zener diode D3, and the voltage at both ends of the Zener diode D5 forms a second DC feed voltage for providing electricity to the display electric circuit. In this embodiment, the first DC supply voltage is ± 5 V and the second DC supply voltage is 2.5 V.
前記多段演算増幅電気回路３は四つの演算増幅器を含み、それぞれ第一演算増幅器Ａ１、第二演算増幅器Ａ２、第三演算増幅器Ａ３と第四演算増幅器Ａ４である。サンプリング導線９（一定の長さの高圧導線を取る）の端子電圧の正出力端子が抵抗Ｒ２、Ｒ３の一端と接続され、抵抗Ｒ２のもう一端を地面に結びつけ、抵抗Ｒ３のもう一端と抵抗Ｒ５の一端が第一演算増幅器の正相入力端子と接続され、抵抗Ｒ５のもう一端を地面に結びつけ、第一演算増幅器の出力端子が抵抗Ｒ６とコンデンサＣ４の一端と接続され、抵抗Ｒ６のもう一端と抵抗Ｒ４の一端が第一演算増幅器の反転入力端子と接続され、抵抗Ｒ４のもう一端を地面に結びつける。コンデンサＣ４のもう一端が第二演算増幅器の正相入力端子と抵抗Ｒ８の一端と接続され、抵抗Ｒ８のもう一端を地面に結びつけ、第二演算増幅器の出力端子が抵抗Ｒ９とコンデンサＣ５の一端と接続され、抵抗Ｒ９のもう一端と抵抗Ｒ７の一端が第二演算増幅器の反転入力端子と接続され、抵抗Ｒ７のもう一端を地面に結びつける。コンデンサＣ５のもう一端が第三演算増幅器の正相入力端子と抵抗Ｒ１０の一端と接続され、抵抗Ｒ１０のもう一端を地面に結びつけ、第三演算増幅器の出力端子が抵抗Ｒ１１とコンデンサＣ６の一端と接続され、抵抗Ｒ１１のもう一端と抵抗Ｒ２０の一端が第三演算増幅器の反転入力端子と接続され、抵抗Ｒ２０のもう一端を地面に結びつける。コンデンサＣ６のもう一端が第四演算増幅器の正相入力端子と抵抗Ｒ１２の一端と接続され、抵抗Ｒ１２のもう一端を地面に結びつけ、第四演算増幅器の出力端子がコンデンサＣ７と抵抗Ｒ１３の一端と接続され、抵抗Ｒ１３のもう一端と抵抗Ｒ２１の一端が第四演算増幅器の反転入力端子と接続され、抵抗Ｒ２１のもう一端を地面に結びつけ、コンデンサＣ７のもう一端が検波電気回路と接続される。内、Ｒ６、Ｒ９、Ｒ１１とＲ１３はそれぞれ第一演算増幅器、第二演算増幅器、第三演算増幅器と第四演算増幅器の拡大倍数を決める。具体的に言うと、本実施例は二つのＬＭ３５８二重演算増幅器を採用する。前記多段演算増幅器は本実施例に説明した四級増幅を含むことに限らない。 The multistage operational amplifier circuit 3 includes four operational amplifiers, a first operational amplifier A1, a second operational amplifier A2, a third operational amplifier A3 and a fourth operational amplifier A4. The positive output terminal of the terminal voltage of the sampling lead 9 (takes a high-voltage lead of a fixed length) is connected to one end of the resistors R2 and R3, the other end of the resistor R2 is connected to the ground, the other end of the resistor R3 and the resistor R5 One end of the first operational amplifier is connected to the positive phase input terminal of the first operational amplifier, the other end of the resistor R5 is connected to the ground, and the output terminal of the first operational amplifier is connected to one end of the resistor R6 and one end of the capacitor C4, the other end of the resistor R6 And one end of the resistor R4 is connected to the inverting input terminal of the first operational amplifier, and the other end of the resistor R4 is connected to the ground. The other end of the capacitor C4 is connected to the positive phase input terminal of the second operational amplifier and one end of the resistor R8, the other end of the resistor R8 is connected to the ground, and the output terminal of the second operational amplifier is the resistor R9 and one end of the capacitor C5. The other end of the resistor R9 and one end of the resistor R7 are connected to the inverting input terminal of the second operational amplifier, and the other end of the resistor R7 is connected to the ground. The other end of the capacitor C5 is connected to the positive phase input terminal of the third operational amplifier and one end of the resistor R10, the other end of the resistor R10 is connected to the ground, and the output terminal of the third operational amplifier is the resistor R11 and one end of the capacitor C6 The other end of the resistor R11 and one end of the resistor R20 are connected to the inverting input terminal of the third operational amplifier, and the other end of the resistor R20 is connected to the ground. The other end of the capacitor C6 is connected to the positive phase input terminal of the fourth operational amplifier and one end of the resistor R12, the other end of the resistor R12 is connected to the ground, and the output terminal of the fourth operational amplifier is connected to the capacitor C7 and one end of the resistor R13. The other end of the resistor R13 and one end of the resistor R21 are connected to the inverting input terminal of the fourth operational amplifier, the other end of the resistor R21 is connected to the ground, and the other end of the capacitor C7 is connected to the detection circuit. Among them, R6, R9, R11 and R13 respectively determine the enlargement factors of the first operational amplifier, the second operational amplifier, the third operational amplifier and the fourth operational amplifier. Specifically, this embodiment employs two LM358 dual operational amplifiers. The multistage operational amplifier is not limited to including the quaternary amplification described in the present embodiment.
前記検波電気回路４はコンデンサＣ７、二極管Ｄ６、二極管Ｄ７、抵抗Ｒ１６、抵抗Ｒ１５、コンデンサＣ９、コンデンサＣ８、抵抗Ｒ１４、抵抗Ｒ１７、抵抗Ｒ１８、ポテンショメータＲｐを含む。二極管Ｄ６の陰極が抵抗Ｒ１５、コンデンサＣ８の一端と接続され、二極管Ｄ７の陰極が抵抗Ｒ１６、コンデンサＣ９の一端と接続され、二極管Ｄ７の陽極、抵抗Ｒ１６、コンデンサＣ９のもう一端及び二極管Ｄ６の陽極、抵抗Ｒ１５、コンデンサＣ８のもう一端が共点接続を形成し、前記二極管Ｄ６、抵抗Ｒ１５、コンデンサＣ８から正検波整流電気回路を構成し、前記二極管Ｄ７、抵抗Ｒ１６、コンデンサＣ９から負検波整流電気回路を構成する。前記共点は抵抗Ｒ１４を通して地面に結びつけ、正検波整流後の出力が抵抗Ｒ１７に接続されてからポテンショメータＲｐの一端と接続し、Ｒｐのもう一端を抵抗Ｒ１８で地面と結びつけ、ポテンショメータＲｐの中間タップによって伝達された電圧値を前記高圧電流導線の電流値と一致するように調整した後アナログ−デジタル変換電気回路５に提供する。 The detection circuit 4 includes a capacitor C7, a diode D6, a diode D7, a resistor R16, a resistor R15, a capacitor C9, a capacitor C8, a resistor R14, a resistor R17, a resistor R18, and a potentiometer Rp. The cathode of diode D6 is connected to resistor R15, one end of capacitor C8, the cathode of diode D7 is connected to resistor R16, one end of capacitor C9, the anode of diode D7, resistor R16, the other end of capacitor C9, and the anode of diode D6. The other end of the resistor R15 and the capacitor C8 form a point connection, and the diode D6, the resistor R15 and the capacitor C8 constitute a positive detection rectification electric circuit, and the diode R7 and the capacitor C9 form a negative detection rectifier Configure the circuit. The same point is connected to the ground through the resistor R14, and the output after positive detection rectification is connected to the resistor R17 and then to one end of the potentiometer Rp, and the other end of Rp is connected to the ground with the resistor R18, and the center tap of the potentiometer Rp The voltage value transmitted by the circuit is adjusted to be equal to the current value of the high voltage current line and provided to the analog-digital conversion circuit 5.
前記電流変成器１は高圧導線に取り付けられ且つその出力端子が整流調整電気回路２と接続され、整流調整電気回路２で整流且つ安定化してから、多段演算増幅電気回路３に給電する第一直流給電電圧と表示電気回路に給電する第二直流給電電圧を得る。 The current transformer 1 is attached to a high voltage line, and its output terminal is connected to the rectification adjustment circuit 2, and after rectification and stabilization by the rectification adjustment circuit 2, a first direct supply power is supplied to the multistage operational amplification circuit 3. A current feed voltage and a second DC feed voltage for feeding the display circuitry are obtained.
測定する時に、前記電流変成器１は高圧導線に取り付けられ且つその出力端子が整流調整電気回路と接続され、整流調整電気回路で整流且つ安定化されてから、多段演算増幅電気回路に作業電圧を提供する第一直流給電電圧と、表示電気回路に作業電圧を提供する第二直流給電電圧を取得する。サンプリング導線の両端の電圧が多段演算増幅電気回路の入力端子に入力され、多段演算増幅電気回路で拡大されて検波電気回路に出力され、検波電気回路で検波されて得た電圧値を対応する前記サンプリング導線上の電流値に転換し、前記電流値をアナログ−デジタル変換電気回路に出力し、前記アナログ−デジタル変換電気回路で前記電流値をデータ信号に転換させ、表示電気回路と接続して前記高圧導線の電流値を表示する。 At the time of measurement, the current transformer 1 is attached to a high voltage wire and its output terminal is connected to a rectification adjustment circuit, rectified and stabilized by the rectification adjustment circuit, and then the working voltage is applied to the multistage operational amplification circuit. A first DC feed voltage to be provided and a second DC feed voltage to provide a working voltage to the display circuitry are obtained. The voltage at both ends of the sampling wire is input to the input terminal of the multistage operational amplifier circuit, expanded by the multistage operational amplifier circuit, output to the detection circuit, and detected by the detection circuit. The current value is converted to a current value on a sampling lead, the current value is output to an analog-digital conversion circuit, the current value is converted to a data signal by the analog-digital conversion circuit, and the display signal is connected to the display circuit. Display the current value of the high voltage wire.
前記信号発信装置がアナログ−デジタル変換電気回路と接続され且つ地上受信装置と無線通信接続され、信号発信装置で測定した電流値を地上受信装置に発送してチェック、記録する。 The signal transmission device is connected to an analog-digital conversion circuit and connected to the ground receiver in wireless communication, and the current value measured by the signal transmission device is sent out to the ground receiver to check and record.
本発明において説明した高圧導線電流の測定装置は高圧導線上のサンプリング導線両端の電圧信号を直接取得して高圧導線の電流を測定し、高圧電流変成器で磁気を電流に転換して電流値を測定する方式を採用しなくても良いので、測定方法がより簡単かつ安全で、コストが低い。 The device for measuring high-voltage wire current described in the present invention directly obtains the voltage signal at both ends of the sampling wire on the high-voltage wire to measure the current of the high-voltage wire, converts the magnetism into current by the high-voltage current transformer, The measurement method is simpler, safer, and less expensive because it does not have to adopt a measurement method.
前記実施例は本発明の好ましい実施例であり、本発明は実施例に限定されるものではなく、本発明の技術実質に基づく、前記実施例に対するいかなる簡単な修正、類似変化及び修飾も本発明技術案の保護範囲に属する。 The above embodiments are preferred embodiments of the present invention, and the present invention is not limited to the embodiments, and any simple modifications, similar changes and modifications to the above embodiments based on the technical substance of the present invention are also the present invention. It belongs to the protection scope of the technical proposal.
Claims (9)
前記電流変成器が高圧導線に取り付けられ且つそれの出力端子が整流調整電気回路に接続され、整流調整電気回路で整流且つ調整されてから、多段演算増幅電気回路に給電する第一直流給電電圧と表示電気回路に給電する第二直流給電電圧が取得され、
サンプリング導線の両端の電圧が多段演算増幅電気回路の入力端子に入力され、多段演算増幅電気回路で拡大されて検波電気回路に出力され、検波電気回路で検波されて前記サンプリング導線の両端の電圧値が取得され、前記電圧値がアナログ−デジタル変換電気回路に出力され、前記アナログ−デジタル変換電気回路で前記電圧値が高圧導線電流値に換算され、且つ表示電気回路と接続して前記高圧導線の電流値が表示され、
前記サンプリング導線は一定長さの電圧導線であることを特徴とする高圧導線電流の測定装置。 What is claimed is: 1. A high-voltage lead current measuring device comprising a current transformer, a rectification adjustment circuit, a multistage operational amplification circuit, a detection circuit, an analog-digital conversion circuit, and a display circuit
The first DC feed voltage for feeding the multistage operational amplification electric circuit after the current transformer is attached to the high voltage conductor and the output terminal thereof is connected to the rectification adjustment electric circuit and rectified and adjusted by the rectification adjustment electric circuit And a second DC feed voltage to feed the display circuitry is obtained,
The voltage at both ends of the sampling lead is input to the input terminal of the multistage operational amplification electric circuit, expanded by the multistage operational amplification electric circuit, output to the detection electric circuit, detected by the detection electric circuit, and the voltage value at both ends of the sampling lead Is obtained, the voltage value is output to an analog-digital conversion circuit, the voltage value is converted into a high voltage lead current value in the analog-digital conversion circuit, and connected to a display electric circuit. The current value is displayed,
The apparatus for measuring high-voltage lead current, wherein the sampling lead is a voltage lead of a fixed length.
電流変成器の一端がコンデンサＣ１の一端と接続され、コンデンサＣ１のもう一端が二極管Ｄ１の陽極と接続され、二極管Ｄ１の陰極を並列連結しているコンデンサＣ２とツェナーダイオードＤ３と接続して多段演算増幅電気回路に給電する第一直流給電電圧の正電圧を生成し、
電流変成器のもう一端が二極管Ｄ２の陰極と接続され、二極管Ｄ２の陽極を並列連結しているコンデンサＣ３とツェナーダイオードＤ４と接続して多段演算増幅電気回路に給電する第一直流給電電圧の負電圧を生成し、
直列後のツェナーダイオードＤ５と抵抗Ｒ１がツェナーダイオードＤ３の両端と並列接続され、前記ツェナーダイオードＤ５両端の電圧が表示電気回路に給電する第二直流給電電圧を形成することを特徴とする請求項１に記載の高圧導線電流の測定装置。 The rectification and adjustment circuit includes a capacitor C1, a capacitor C2, a capacitor C3, a double tube D1, a double tube D2, a zener diode D3, a zener diode D4, a zener diode D5 and a resistor R1.
One end of the current transformer is connected to one end of the capacitor C1, the other end of the capacitor C1 is connected to the anode of the double tube D1, and the capacitor C2 connecting the cathode of the double tube D1 in parallel is connected to the zener diode D3 to perform multistage operation Generate a positive voltage of the first DC feed voltage to feed the amplification circuit,
The other end of the current transformer is connected to the cathode of the diode D2, and the capacitor C3 and the Zener diode D4 are connected in parallel to connect the anode of the diode D2 to supply the multistage operational amplifier electric circuit Generate a negative voltage,
A Zener diode D5 after series connection and a resistor R1 are connected in parallel with both ends of the Zener diode D3, and a voltage at both ends of the Zener diode D5 forms a second DC feeding voltage for feeding a display electric circuit. Device for measuring high-voltage wire current according to claim 1.
サンプリング導線の端子電圧の正出力端子が抵抗Ｒ２、Ｒ３の一端と接続され、抵抗Ｒ２のもう一端が地面に結びつけられ、抵抗Ｒ３のもう一端と抵抗Ｒ５の一端が第一演算増幅器の正相入力端子と接続され、抵抗Ｒ５のもう一端が地面に結びつけられ、第一演算増幅器の出力端子が抵抗Ｒ６とコンデンサＣ４の一端と接続され、抵抗Ｒ６のもう一端と抵抗Ｒ４の一端が第一演算増幅器の反転入力端子と接続され、抵抗Ｒ４のもう一端が地面に結びつけられる、
コンデンサＣ４のもう一端が第二演算増幅器の正相入力端子と抵抗Ｒ８の一端と接続され、抵抗Ｒ８のもう一端が地面に結びつけられ、第二演算増幅器の出力端子が抵抗Ｒ９とコンデンサＣ５の一端と接続され、抵抗Ｒ９のもう一端と抵抗Ｒ７の一端が第二演算増幅器の反転入力端子と接続され、抵抗Ｒ７のもう一端が地面に結びつけられ、
コンデンサＣ５のもう一端が第三演算増幅器の正相入力端子と抵抗Ｒ１０の一端と接続され、抵抗Ｒ１０のもう一端が地面に結びつけられ、第三演算増幅器の出力端子が抵抗Ｒ１１とコンデンサＣ６の一端と接続され、抵抗Ｒ１１のもう一端と抵抗Ｒ２０の一端が第三演算増幅器の反転入力端子と接続され、抵抗Ｒ２０のもう一端が地面に結びつけられ、
コンデンサＣ６のもう一端が第四演算増幅器の正相入力端子と抵抗Ｒ１２の一端と接続され、抵抗Ｒ１２のもう一端が地面に結びつけられ、第四演算増幅器の出力端子がコンデンサＣ７と抵抗Ｒ１３の一端と接続され、抵抗Ｒ１３のもう一端と抵抗Ｒ２１の一端が第四演算増幅器の反転入力端子と接続され、抵抗Ｒ２１のもう一端が地面に結びつけられ、コンデンサＣ７のもう一端が検波電気回路と接続されることを特徴とする請求項１に記載の高圧導線電流の測定装置。 The multistage operational amplifier circuit includes four operational amplifiers, which are a first operational amplifier, a second operational amplifier, a third operational amplifier, and a fourth operational amplifier, respectively.
The positive output terminal of the terminal voltage of the sampling lead is connected to one end of the resistors R2 and R3, the other end of the resistor R2 is connected to the ground, and the other end of the resistor R3 and one end of the resistor R5 are positive phase inputs of the first operational amplifier The other end of the resistor R5 is connected to the ground, the output terminal of the first operational amplifier is connected to the resistor R6 and one end of the capacitor C4, and the other end of the resistor R6 and one end of the resistor R4 are the first operational amplifier Connected to the inverting input terminal of the and the other end of the resistor R4 is tied to the ground,
The other end of the capacitor C4 is connected to the positive phase input terminal of the second operational amplifier and one end of the resistor R8, the other end of the resistor R8 is connected to the ground, and the output terminal of the second operational amplifier is one end of the resistor R9 and one end of the capacitor C5 And the other end of the resistor R9 and one end of the resistor R7 are connected to the inverting input terminal of the second operational amplifier, and the other end of the resistor R7 is connected to the ground,
The other end of the capacitor C5 is connected to the positive phase input terminal of the third operational amplifier and one end of the resistor R10, the other end of the resistor R10 is connected to the ground, and the output terminal of the third operational amplifier is one end of the resistor R11 and one end of the capacitor C6 The other end of the resistor R11 and one end of the resistor R20 are connected to the inverting input terminal of the third operational amplifier, and the other end of the resistor R20 is connected to the ground,
The other end of the capacitor C6 is connected to the positive phase input terminal of the fourth operational amplifier and one end of the resistor R12, the other end of the resistor R12 is connected to the ground, and the output terminal of the fourth operational amplifier is one end of the capacitor C7 and one end of the resistor R13 The other end of the resistor R13 and one end of the resistor R21 are connected to the inverting input terminal of the fourth operational amplifier, the other end of the resistor R21 is connected to the ground, and the other end of the capacitor C7 is connected to the detection electric circuit The measuring apparatus of the high voltage | pressure wire electric current of Claim 1 characterized by the above-mentioned.
二極管Ｄ６の陰極が抵抗Ｒ１５、コンデンサＣ８の一端と接続され、二極管Ｄ７の陰極が抵抗Ｒ１６、コンデンサＣ９の一端と接続され、二極管Ｄ７の陽極、抵抗Ｒ１６、コンデンサＣ９のもう一端及び二極管Ｄ６の陽極、抵抗Ｒ１５、コンデンサＣ８のもう一端が共点接続を形成し、前記二極管Ｄ６、抵抗Ｒ１５、コンデンサＣ８から正検波整流回路が構成され、前記二極管Ｄ７、抵抗Ｒ１６、コンデンサＣ９から負検波整流回路が構成され、
前記共点は抵抗Ｒ１４を通して地面に結びつけられ、正検波整流後の出力が抵抗Ｒ１７で接続されてからポテンショメータＲｐの一端と接続し、Ｒｐのもう一端を抵抗Ｒ１８で地面と結びつけられ、ポテンショメータＲｐの中間タップによって伝達された電圧値は前記高圧電流導線の電流値と一致するように調整された後アナログ−デジタル変換電気回路に提供されることを特徴とする請求項１又は４に記載の高圧導線電流の測定装置。 The detection circuit includes a capacitor C7, a diode D6, a diode D7, a resistor R16, a resistor R15, a capacitor C9, a capacitor C8, a resistor R14, a resistor R17, a resistor R18 and a potentiometer Rp,
The cathode of diode D6 is connected to resistor R15, one end of capacitor C8, the cathode of diode D7 is connected to resistor R16, one end of capacitor C9, the anode of diode D7, resistor R16, the other end of capacitor C9, and the anode of diode D6. The other end of the resistor R15 and the capacitor C8 form a point connection, and a positive detection rectifier circuit is formed of the diode D6, the resistor R15 and the capacitor C8, and a negative detection rectifier circuit is formed of the diode D7, the resistor R16 and the capacitor C9. Configured and
The point is connected to the ground through a resistor R14, and the output after positive detection rectification is connected by a resistor R17 and then connected to one end of a potentiometer Rp, and the other end of Rp is connected to the ground by a resistor R18. 5. The high voltage conductor as claimed in claim 1, wherein the voltage value transmitted by the intermediate tap is adjusted to match the current value of the high voltage current conductor and then provided to an analog-digital conversion circuit. Current measuring device.
高圧導線に取り付けられる電流変成器の出力端子が整流調整電気回路と接続され、整流調整電気回路で整流且つ安定化してから、多段演算増幅電気回路に給電する第一直流給電電圧と表示電気回路に給電する第二直流給電電圧を取得する、
ことを特徴とする高圧導線電流の測定方法。 A high voltage wire of a fixed length is selected, the voltage at both ends of the sampling wire is input to the input terminal of the multistage operational amplifier circuit, expanded by the multistage operational amplifier circuit, and then output to the detection circuit, by the detection circuit The voltage value at both ends of the sampling wire is acquired, the voltage value is output to an analog-digital conversion circuit, the voltage value is converted into the current value of the high voltage wire by the analog-digital conversion circuit, and the display circuit is connected. Display the current value of the high voltage wire,
The output terminal of the current transformer attached to the high voltage conductor is connected to the rectification adjustment circuit, and after rectification and stabilization by the rectification adjustment circuit, the first DC supply voltage and the display circuit for feeding the multistage operational amplification circuit Obtain a second DC feed voltage to feed the
A method of measuring a high voltage lead current characterized by:
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| CN111929517A (en) * | 2020-07-27 | 2020-11-13 | 常州明阳软件科技有限公司 | Real-time detection method and device for disinfection factor during sterilizer operation |
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