JPH07297765A - Distribution line carrier signal synchronous injection method - Google Patents
Distribution line carrier signal synchronous injection methodInfo
- Publication number
- JPH07297765A JPH07297765A JP6107422A JP10742294A JPH07297765A JP H07297765 A JPH07297765 A JP H07297765A JP 6107422 A JP6107422 A JP 6107422A JP 10742294 A JP10742294 A JP 10742294A JP H07297765 A JPH07297765 A JP H07297765A
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- Prior art keywords
- phase
- commercial frequency
- distribution line
- signal
- substation
- Prior art date
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- Synchronisation In Digital Transmission Systems (AREA)
Abstract
(57)【要約】
【目的】 配電線搬送信号の同期注入方法を簡易に実現
し、配電系統が異なる変電所間が連系されている場合に
おいても、信号の干渉による受信信号レベルの減衰を最
小限にする。
【構成】 配電線路を伝送路として使用し、商用周波を
逓倍または逓倍後分周した波形を搬送波として商用周波
に重畳させ、信号の伝送を行う配電線搬送方法におい
て、複数の変電所の送信装置から同時に信号を注入して
配電線路上に接続された受信装置に指令を送信する場合
に、複数の変電所にそれぞれ設置される送信装置の搬送
波を生成するための商用周波を、３相商用周波の特定の
１相とし、中央装置は、各変電所の送信装置に送られる
送信指令データの終了時点を、３相商用周波の特定の１
相のゼロ交差点を避けた位相となるように制御し、送信
装置は、送信指令データ受信後最初に発生する３相商用
周波の特定の１相のゼロ交差点から、各変電所で共有す
る商用周波の逓倍または逓倍後分周する動作を開始して
前記信号の注入を行うようにしている。
(57) [Abstract] [Purpose] A simple method of synchronous injection of distribution line carrier signals can be used to reduce received signal level attenuation due to signal interference even when substations with different distribution systems are interconnected. Minimize. [Composition] A transmission device of a plurality of substations in a distribution line carrier method in which a distribution line is used as a transmission line, a waveform obtained by multiplying or dividing a commercial frequency is superimposed as a carrier frequency on the commercial frequency, and a signal is transmitted. From the three-phase commercial frequency to generate the carrier waves of the transmitting devices installed in each of the substations when the signals are simultaneously injected from the device and the command is transmitted to the receiving devices connected to the distribution line. The central unit determines the end time point of the transmission command data sent to the transmission device of each substation as the specific one phase of the three-phase commercial frequency.
The transmitter controls the phase so as to avoid the phase zero-crossing point, and the transmitting device starts from the specific one-phase zero-crossing point of the three-phase commercial frequency that occurs first after receiving the transmission command data, and then the commercial frequency shared by each substation. Is started or the operation of dividing after the multiplication is started to inject the signal.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、配電線路を信号の伝送
路として使用する配電線搬送方法における信号の注入方
法の改良に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a signal injection method in a distribution line carrying method using a distribution line as a signal transmission path.
【０００２】[0002]
【従来の技術】配電線搬送方法は、配電系統において配
電線路上の下位に接続された子局に対する監視・制御の
ための信号の送受信に既設の配電線路を活用できること
から、電力会社の配電系統自動化システムにおける信号
伝送方法として広く利用されており、システム機能とし
て、負荷集中制御、開閉器制御、各種配電管理情報の収
集、自動検針などがある。2. Description of the Related Art A distribution line transportation method is used in a distribution system of an electric power company because it can utilize an existing distribution line for transmitting and receiving signals for monitoring and controlling slave stations connected to a lower part of the distribution line in the distribution system. It is widely used as a signal transmission method in an automated system, and has system functions such as load concentration control, switch control, collection of various distribution management information, and automatic meter reading.
【０００３】配電線搬送方法を用いたシステムでは、一
般に単位システムの監視・制御の対象エリア内に複数の
配電用変電所が含まれるので、各々の変電所に信号送信
装置を設置し、配電系統上に散在する子局の端末機器に
監視・制御指令を送信する方法を採用している。In a system using the distribution line transportation method, a plurality of distribution substations are generally included in the monitoring / control target area of the unit system. Therefore, a signal transmission device is installed in each substation and the distribution system is installed. It employs a method of sending monitoring / control commands to the terminal devices of the slave stations scattered above.
【０００４】[0004]
【発明が解決しようとする課題】この方法で問題となる
のが、複数の配電用変電所から同時に信号が注入される
場合である。すなわち、監視対象が複数の変電所の配電
系統にわたって散在する開閉器制御用子局の群監視を行
う場合などでは、各配電用変電所から同時に信号を送信
するのが効率的であるが、配電系統は運用上相異なる変
電所の配電系統間で連系していることが多く、このよう
な場合、各変電所から子局あて送信されてくる信号の位
相が同期していないと、各信号源からの信号が互いに干
渉して受信点で歪みを生じ、子局における受信信号レベ
ルが減衰する可能性がある。A problem with this method is that signals are simultaneously injected from a plurality of distribution substations. In other words, it is effective to send signals from each distribution substation at the same time when monitoring the group of switch control slave stations scattered over the distribution system of multiple substations. In many cases, the grids are interconnected between the distribution systems of different substations in terms of operation.In such a case, if the phases of the signals sent from each substation to the slave stations are not synchronized, The signals from the sources may interfere with each other, causing distortion at the point of reception and attenuating the received signal level at the slave station.
【０００５】ここで、同期注入方法を実現する最も確実
な方法は、システムの中央装置で指令データで変調され
た信号を発生させ、この信号を通信回線を介して各配電
用変電所の送信装置に送信し、送信装置は受信した信号
を増幅して配電線に注入する方法である。この方法は、
中央装置において発生させた単一の信号を各配電用変電
所で共有することから同期注入が確実に実現されるが、
信号を送信するための専用の回線が必要となり、特に３
相の信号を注入する場合は、２ないし３回線を必要とす
るので、経済的にも問題があった。Here, the most reliable method of realizing the synchronous injection method is to generate a signal modulated by command data in the central unit of the system, and to transmit this signal via the communication line to the transmitting device of each distribution substation. Is transmitted to the transmission line, and the transmission device amplifies the received signal and injects it into the distribution line. This method
Synchronous injection is surely realized because the single signal generated in the central unit is shared by each distribution substation.
A dedicated line is required to send signals, especially 3
Injecting phase signals requires two or three lines, which is economically problematic.
【０００６】本発明の目的は、上述の課題を解決し、配
電線搬送信号の同期注入方法を簡易に実現し、配電系統
が異なる変電所間が連系されている場合においても、信
号の干渉による受信信号レベルの減衰を最小限にするこ
とである。An object of the present invention is to solve the above problems, to easily realize a synchronous injection method of distribution line carrier signals, and to prevent signal interference even when substations having different distribution systems are interconnected. To minimize the attenuation of the received signal level.
【０００７】[0007]
【課題を解決するための手段】本発明では、複数の変電
所の送信装置から同時に信号を注入して配電線路上に接
続された受信装置に指令を送信する場合に、複数の変電
所にそれぞれ設置される送信装置の搬送波を生成するた
めの商用周波を、３相商用周波の特定の１相とし、中央
装置は、各変電所の送信装置に送られる送信指令データ
の終了時点を、３相商用周波の特定の１相のゼロ交差点
を避けた位相となるように制御し、送信装置は、送信指
令データ受信後最初に発生する３相商用周波の特定の１
相のゼロ交差点から、各変電所で共有する商用周波の逓
倍または逓倍後分周する動作を開始して前記信号の注入
を行うようにし、以て、各変電所の送信装置において商
用周波から生成される搬送波の位相を同一とすると共
に、搬送波を変調する変調速度を商用周波に同期させる
ようにしている。According to the present invention, when signals are simultaneously injected from transmitters of a plurality of substations and a command is transmitted to a receiver connected to a distribution line, each of the plurality of substations is supplied with a command. The commercial frequency for generating the carrier wave of the installed transmission device is set to a specific one phase of the three-phase commercial frequency, and the central device sets the end point of the transmission command data sent to the transmission device of each substation to three phases. The transmission device controls the phase so as to avoid the zero crossing point of the specified one phase of the commercial frequency, and the transmission device specifies the specified one of the three-phase commercial frequency that occurs first after receiving the transmission command data.
From the zero crossing point of the phase, the operation of multiplying or dividing the commercial frequency shared by each substation is started to inject the signal so that it is generated from the commercial frequency in the transmitter of each substation. The phase of the carrier wave to be generated is the same, and the modulation speed for modulating the carrier wave is synchronized with the commercial frequency.
【０００８】[0008]
【実施例】図１は、本発明の配電線搬送信号同期注入方
法を実施する配電線搬送システムの一例を示すブロック
図である。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing an example of a distribution line carrier system for carrying out the distribution line carrier signal synchronous injection method of the present invention.
【０００９】本発明の方法の特徴は、搬送波を商用周波
から生成する方法であることを活用する点にある。すな
わち、図１の送信装置１で搬送波を生成するための商用
周波を、各変電所とも３相商用周波の内の特定の１相と
することで、各変電所の送信装置１において商用周波か
ら生成された搬送波の位相が同一となると共に、搬送波
を変調する変調速度も商用周波に同期し、かつ、各変電
所における変調の開始を同一時間となるようにすれば、
以後の信号の搬送波の位相および変調速度のいずれも
が、各変電所が共有する商用周波に同期しているので、
各変電所から注入される信号の位相は信号の終了時点ま
で位相差を生じることがない同期されたものとなる。A feature of the method of the present invention is that it utilizes a method of generating a carrier wave from a commercial frequency. That is, by setting the commercial frequency for generating the carrier wave in the transmission device 1 of FIG. 1 to be a specific one phase of the three-phase commercial frequency in each substation, the transmission device 1 in each substation can change the commercial frequency from the commercial frequency. If the phase of the generated carrier wave is the same, the modulation speed for modulating the carrier wave is also synchronized with the commercial frequency, and the start of modulation at each substation is the same time,
Since both the carrier wave phase and the modulation speed of the subsequent signals are synchronized with the commercial frequency shared by each substation,
The phase of the signal injected from each substation is synchronized without any phase difference until the end of the signal.
【００１０】送信装置１側の３相商用周波の特定の１相
は、ＬＰＦ（低域ろ波器）３を通過したのち通信回線４
のモデム搬送波に重畳されて、中央装置２側に伝達され
る。中央装置２では、ＬＰＦ（低域ろ波器）５により特
定相の商用周波を、ＨＰＦ（高域ろ波器）６によりモデ
ム搬送波をそれぞれ分別し、送受信回路７に入力する。A specific one phase of the three-phase commercial frequency on the transmitter 1 side passes through an LPF (low-pass filter) 3 and then a communication line 4
And is transmitted to the central device 2 side. In the central unit 2, the LPF (low-pass filter) 5 separates the commercial frequency of a specific phase and the HPF (high-pass filter) 6 separates the modem carrier wave, and inputs them to the transmission / reception circuit 7.
【００１１】中央装置２は制御装置８の制御により、そ
の特定相の商用周波の位相を基準としたタイミングで指
令データを各変電所の送信装置１に発信する。Under the control of the control unit 8, the central unit 2 transmits command data to the transmitting unit 1 of each substation at a timing based on the phase of the commercial frequency of the specific phase.
【００１２】送信装置１は、中央装置２へ伝達した特定
相の商用周波を基に、逓倍回路９および分周回路１０に
より逓倍または逓倍後の分周による搬送波を生成し、中
央装置２からの指令データを送受信回路１１を介して受
信し、制御回路１２の制御により指令データに応じて変
調回路１３により搬送波の変調を行う。変調された搬送
波は増幅回路１４および結合回路１５を介して配電線路
１６に注入される。Based on the commercial frequency of the specific phase transmitted to the central unit 2, the transmitter 1 generates a carrier wave by multiplication or frequency division by the frequency multiplication circuit 9 and the frequency division circuit 10, and the central unit 2 outputs the carrier wave. The command data is received via the transmission / reception circuit 11, and the control circuit 12 controls the modulation circuit 13 to modulate the carrier according to the command data. The modulated carrier wave is injected into the power distribution line 16 via the amplifier circuit 14 and the coupling circuit 15.
【００１３】なお、ＭＯＤ（変調器）１７，１８はモデ
ム搬送回線用の変調器であり、ＤＥＭ（復調器）１９，
２０は同じく復調器である。MODs (modulators) 17 and 18 are modulators for a modem carrier line, and DEMs (demodulators) 19 and 18,
20 is also a demodulator.
【００１４】但し、ここで問題となるのは、搬送波の周
波数を商用周波の（ｎ＋１／２）倍（ｎ：整数）、すな
わち、搬送波を、商用周波を基本波とする高調波の間に
設定する場合である。However, the problem here is that the frequency of the carrier wave is set to (n + 1/2) times the commercial frequency (n: integer), that is, the carrier wave is set between the harmonics having the commercial frequency as the fundamental wave. This is the case.
【００１５】図２は、商用周波と搬送波との関係を示す
図であり、図２（ａ）のように、搬送波が商用周波を逓
倍（図では４倍）した波形である場合は、商用周波を共
有し同一の逓倍回路により生成された、各変電所の送信
装置１から注入される搬送波の位相は、無条件に常に同
期するが、逓倍した波形をさらに分周し、商用周波の
（ｎ＋１／２）倍の周波数を搬送波周波数として用いる
場合は、図２（ｂ）（ここでは３．５倍）のように、商
用周波の位相と搬送波の位相との関係は一定とならず、
したがって、各変電所の送信装置１の間で位相差（１８
０°）を生じる可能性がある。FIG. 2 is a diagram showing the relationship between the commercial frequency and the carrier wave. As shown in FIG. 2A, when the carrier wave has a waveform obtained by multiplying the commercial frequency (four times in the figure), the commercial frequency is shown. , The phase of the carrier wave that is generated by the same multiplication circuit and is injected from the transmission device 1 of each substation is always unconditionally synchronized, but the multiplied waveform is further divided to obtain the commercial frequency (n + 1). 2/2 times the frequency is used as the carrier frequency, the relationship between the phase of the commercial frequency and the phase of the carrier is not constant as shown in FIG. 2B (here, 3.5 times).
Therefore, the phase difference (18
0 °) may occur.
【００１６】そこで、本発明では、図３に示すような位
相同期方法を採用している。すなわち、図１に示すよう
に、中央装置２は各変電所の送信装置１と通信回線４に
より接続されており、送信時に指令データを送信装置１
に転送する。この転送は各変電所に対して同時に行わ
れ、かつ、指令データの終了が各変電所で共有する基準
商用周波の１８０°位相を中心に±ｔ1 以内のタイミン
グとなるようにする。Therefore, in the present invention, the phase synchronization method as shown in FIG. 3 is adopted. That is, as shown in FIG. 1, the central device 2 is connected to the transmission device 1 of each substation by the communication line 4, and transmits command data at the time of transmission.
Transfer to. This transfer is performed simultaneously for each substation, and the end of the command data is set within ± t 1 around the 180 ° phase of the reference commercial frequency shared by the substations.
【００１７】送信装置１は、指令データ受信後の商用周
波の最初の０°位相から逓倍または逓倍後分周した搬送
波を０°から生成開始するように、分周回路１０の出力
の極性を制御する。The transmitter 1 controls the polarity of the output of the frequency dividing circuit 10 so as to start generation from 0 ° of the carrier wave which is multiplied or divided after the first 0 ° phase of the commercial frequency after receiving the command data. To do.
【００１８】ここでｔ1 は、指令データに対する送信装
置１の応答時間を考慮して、正確に指令データ受信後の
商用周波の０°位相から分周回路１０の出力を搬送波と
して起動できるように、０°位相を十分避けて、１８０
°位相を中心として設定される指令位置許容範囲であ
り、通常５ｍｓ程度とされる。Here, in consideration of the response time of the transmitting device 1 to the command data, t 1 is set so that the output of the frequency dividing circuit 10 can be accurately started as a carrier from the 0 ° phase of the commercial frequency after the command data is received. , 0 ° phase is avoided, 180
° This is the command position allowable range set around the phase, and is usually set to about 5 ms.
【００１９】信号を３相配電線路に注入する場合は、信
号自体も３相信号として配電線路１６のいずれの線間か
らも信号の検出を可能とする方法が一般的であるが、こ
の場合、信号の相順を０°位相の起動点から、たとえ
ば、Ｕ，Ｖ，Ｗの、各変電所で配電線路１６に対して共
通の相順としておく。In the case of injecting a signal into the three-phase distribution line, it is common to detect the signal itself as a three-phase signal from any line of the distribution line 16, but in this case, The phase sequence of signals is set to a common phase sequence from the starting point of 0 ° phase to the distribution line 16 in each substation of U, V, and W, for example.
【００２０】指令データ受信後の０°位相から搬送波を
起動する本方法は、本方法で用いる変調速度を商用周波
と同期させる方法とも、変調速度を商用周波に同期させ
るために変調信号を切り換えるタイミングをとるための
信号を生成する上で整合を取りやすいものであり、以後
の各変電所の送信装置１からの信号は、信号の終了時点
まで完全に位相を同期させることができる。This method of starting the carrier wave from the 0 ° phase after receiving the command data includes both the method of synchronizing the modulation speed used in this method with the commercial frequency and the timing of switching the modulation signal to synchronize the modulation speed with the commercial frequency. It is easy to achieve matching in generating a signal for obtaining the signal, and the signal from the transmission device 1 of each substation thereafter can be perfectly synchronized in phase until the end point of the signal.
【００２１】なお、前述のように、本方法では、各変電
所の送信装置１が、基準となる商用周波を共有している
ことを監視し、また、基準とする商用周波の特定位相で
中央装置２から送信装置１に対する指令が終了するよう
に制御する必要があるため、中央装置２に送信装置１か
ら基準とする商用周波を転送させている。As described above, according to the present method, it is monitored that the transmitters 1 of the respective substations share the reference commercial frequency, and the center at a specific phase of the reference commercial frequency. Since it is necessary to control so that the command from the device 2 to the transmission device 1 is completed, the central device 2 is made to transfer the reference commercial frequency from the transmission device 1.
【００２２】これの媒体は一般にモデム搬送回線となる
ので、周波数の低い商用周波を中央装置２向けの通信回
線４に重畳し、周波数帯を分離して使用することで回線
の共用を行い、経済化を図っている。Since this medium is generally a modem carrier line, a low-frequency commercial frequency is superposed on the communication line 4 for the central unit 2, and the frequency band is separated for use to share the line. It is trying to make it.
【００２３】各変電所の信号注入点で位相を同期させる
本方法を採用しても、配電線路１６の位相特性の差か
ら、受信点における信号の位相に一定の差を生じること
は避けられない。ただし、この位相差は実際の配電系統
を例とする計算の結果によれば、信号周波数を数百Ｈｚ
の低周波とすれば、概ね４５°以下であり、したがっ
て、信号の干渉により受信信号レベルが大きく減衰する
ことはなく、本発明の同期注入方法が有効であることが
明らかとなっている。Even if the present method of synchronizing the phases at the signal injection points of the respective substations is adopted, it is inevitable that the signal phase at the receiving point will have a certain difference due to the difference in the phase characteristics of the distribution line 16. . However, this phase difference shows that the signal frequency is several hundred Hz, according to the calculation results of an actual distribution system.
The low frequency is about 45 ° or less. Therefore, it is clear that the received signal level is not greatly attenuated by signal interference and the synchronous injection method of the present invention is effective.
【００２４】[0024]
【発明の効果】以上説明したように、本発明によれば、
複数の変電所の送信装置から同時に信号を注入して配電
線路上に接続された受信装置に指令を送信する場合に、
複数の変電所にそれぞれ設置される送信装置の搬送波を
生成するための商用周波を、３相商用周波の特定の１相
とし、中央装置は、各変電所の送信装置に送られる送信
指令データの終了時点を、３相商用周波の特定の１相の
ゼロ交差点を避けた位相となるように制御し、送信装置
は、送信指令データ受信後最初に発生する３相商用周波
の特定の１相のゼロ交差点から、各変電所で共有する商
用周波の逓倍または逓倍後分周する動作を開始して前記
信号の注入を行うようにし、以て、各変電所の送信装置
において商用周波から生成される搬送波の位相を同一と
すると共に、搬送波を変調する変調速度を商用周波に同
期させるようにしたから、配電線搬送信号の同期注入方
法を簡易に実現することができ、配電系統が異なる変電
所間で連系されている場合においても、信号の干渉によ
る受信信号レベルの減衰を最小限にすることができる。As described above, according to the present invention,
When transmitting signals from transmitters of multiple substations at the same time and transmitting commands to receivers connected to the distribution line,
The commercial frequency for generating the carrier wave of the transmission device installed in each of the plurality of substations is a specific one phase of the three-phase commercial frequency, and the central device controls the transmission command data sent to the transmission device of each substation. The end point is controlled to be a phase avoiding the zero crossing point of the specific one phase of the three-phase commercial frequency, and the transmission device sets the specific one-phase of the three-phase commercial frequency that occurs first after receiving the transmission command data. From the zero crossing point, the operation of multiplying or dividing the commercial frequency shared by each substation is started to inject the signal, and thus the transmitter of each substation is generated from the commercial frequency. Since the phase of the carrier wave is made the same and the modulation speed for modulating the carrier wave is synchronized with the commercial frequency, it is possible to easily realize the synchronous injection method of the distribution line carrier signal, and between substations with different distribution systems. Is connected with Even if that can minimize the attenuation of the received signal level due to the interference signal.
【図１】本発明の配電線搬送信号同期注入方法を実施す
る配電線搬送システムの一例を示すブロック図である。FIG. 1 is a block diagram showing an example of a distribution line carrier system for carrying out a distribution line carrier signal synchronous injection method of the present invention.
【図２】特定相の商用周波と搬送波との関係を示す図で
ある。FIG. 2 is a diagram showing a relationship between a commercial frequency of a specific phase and a carrier wave.
【図３】本発明における指令データ、特定相の商用周波
および搬送波の関係を示す図である。FIG. 3 is a diagram showing a relationship between command data, a commercial frequency of a specific phase, and a carrier wave in the present invention.
１ 送信装置 ２ 中央装置 ３ ＬＰＦ（低域ろ波器） ４ 通信回線 ５ ＬＰＦ（低域ろ波器） ６ ＨＰＦ（高域ろ波器） ７ 送受信回路 ８ 制御回路 ９ 逓倍回路 １０ 分周回路 １１ 送受信回路 １２ 制御回路 １３ 変調回路 １４ 増幅回路 １５ 結合回路 １６ 配電線路 １７ ＭＯＤ（変調器） １８ ＭＯＤ（変調器） １９ ＤＥＭ（復調器） ２０ ＤＥＭ（復調器） 1 Transmitter 2 Central Unit 3 LPF (Low-pass Filter) 4 Communication Line 5 LPF (Low-pass Filter) 6 HPF (High-pass Filter) 7 Transmitter / Receiver Circuit 8 Control Circuit 9 Multiplier Circuit 10 Frequency Divider 11 Transmission / reception circuit 12 Control circuit 13 Modulation circuit 14 Amplification circuit 15 Coupling circuit 16 Distribution line 17 MOD (modulator) 18 MOD (modulator) 19 DEM (demodulator) 20 DEM (demodulator)
───────────────────────────────────────────────────── フロントページの続き (72)発明者 橋本 茂之 宮城県仙台市青葉区一番町三丁目７番１号 東北電力株式会社内 (72)発明者 小山 恭一 東京都品川区東五反田２丁目２番７号 大 崎電気工業株式会社内 (72)発明者 倉田 浩之 東京都品川区東五反田２丁目２番７号 大 崎電気工業株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Shigeyuki Hashimoto, Inventor 3-7-1, Ichibancho, Aoba-ku, Sendai City, Miyagi Prefecture Tohoku Electric Power Co., Inc. No. 7 inside Osaki Electric Industry Co., Ltd. (72) Inventor Hiroyuki Kurata 2-2-7 Higashigotanda, Shinagawa-ku, Tokyo Inside Osaki Electric Industry Co., Ltd.
Claims (1)
波を逓倍または逓倍後分周した波形を搬送波として商用
周波に重畳させ、信号の伝送を行う配電線搬送方法にお
いて、複数の変電所の送信装置から同時に信号を注入し
て配電線路上に接続された受信装置に指令を送信する場
合に、複数の変電所にそれぞれ設置される前記送信装置
の搬送波を生成するための商用周波を、３相商用周波の
特定の１相とし、中央装置は、各変電所の前記送信装置
に送られる送信指令データの終了時点を、３相商用周波
の特定の１相のゼロ交差点を避けた位相となるように制
御し、前記送信装置は、送信指令データ受信後最初に発
生する３相商用周波の特定の１相のゼロ交差点から、各
変電所で共有する商用周波の逓倍または逓倍後分周する
動作を開始して前記信号の注入を行うようにしたことを
特徴とする配電線搬送信号同期注入方法。1. A distribution line carrier method for transmitting a signal, wherein a distribution line is used as a transmission line, and a waveform obtained by multiplying or dividing a commercial frequency as a carrier wave is superimposed on the commercial frequency to transmit a signal. When a signal is simultaneously injected from the transmitter and a command is transmitted to the receiver connected to the distribution line, a commercial frequency for generating a carrier wave of the transmitter installed in each of the plurality of substations is set to 3 V. The phase is set to a specific phase of the commercial frequency, and the central unit sets the end point of the transmission command data sent to the transmitter of each substation to a phase avoiding the zero crossing point of the specific one phase of the three-phase commercial frequency. The transmission device operates to multiply or divide the commercial frequency shared by each substation from the zero crossing point of a specific one phase of the three-phase commercial frequency that occurs first after receiving the transmission command data. To start A method for synchronously injecting a distribution line carrier signal, characterized in that a signal is injected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10742294A JP3146108B2 (en) | 1994-04-25 | 1994-04-25 | Distribution line carrier signal synchronous injection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10742294A JP3146108B2 (en) | 1994-04-25 | 1994-04-25 | Distribution line carrier signal synchronous injection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07297765A true JPH07297765A (en) | 1995-11-10 |
| JP3146108B2 JP3146108B2 (en) | 2001-03-12 |
Family
ID=14458752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10742294A Expired - Fee Related JP3146108B2 (en) | 1994-04-25 | 1994-04-25 | Distribution line carrier signal synchronous injection method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3146108B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007034854A1 (en) * | 2005-09-22 | 2007-03-29 | Matsushita Electric Industrial Co., Ltd. | Communication apparatus for allowing communication systems to be coexistent, and coexistence method |
| JP2013165383A (en) * | 2012-02-10 | 2013-08-22 | Denso Corp | Vehicle power line communication system |
-
1994
- 1994-04-25 JP JP10742294A patent/JP3146108B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007034854A1 (en) * | 2005-09-22 | 2007-03-29 | Matsushita Electric Industrial Co., Ltd. | Communication apparatus for allowing communication systems to be coexistent, and coexistence method |
| JP2013165383A (en) * | 2012-02-10 | 2013-08-22 | Denso Corp | Vehicle power line communication system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3146108B2 (en) | 2001-03-12 |
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