JPH07183836A - Coupling filter device for distribution line carrier communication - Google Patents

Coupling filter device for distribution line carrier communication

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Publication number
JPH07183836A
JPH07183836A JP34675793A JP34675793A JPH07183836A JP H07183836 A JPH07183836 A JP H07183836A JP 34675793 A JP34675793 A JP 34675793A JP 34675793 A JP34675793 A JP 34675793A JP H07183836 A JPH07183836 A JP H07183836A
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Japan
Prior art keywords
transformer
distribution line
switching
circuit
capacitance
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JP34675793A
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Japanese (ja)
Inventor
Toyotoshi Azegami
Zenichiro Kojima
Kazuhiko Oba
Yuichi Shimizu
一彦 大場
善一郎 小島
祐一 清水
豊利 畔上
Original Assignee
San'eisha Mfg Co Ltd
Tokyo Electric Power Co Inc:The
東京電力株式会社
株式会社三英社製作所
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Priority to JP34675793A priority Critical patent/JPH07183836A/en
Publication of JPH07183836A publication Critical patent/JPH07183836A/en
Application status is Pending legal-status Critical

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Abstract

PURPOSE: To easily perform a matching even when the line impedance of a distribution line changes and to obtain an optimum transmission characteristic in conformable to the status of a line at a site.
CONSTITUTION: This device is provided with an insulating transformer 10 provided between one end of the secondary coil 4B of a transformer 4 and a serial capacitor 5, plural compensation capacitors 7A to 7C each having a prescribed capacitance and provided between the secondary coil 10B of the insulating transformer 10 and the secondary coil 4B of the transformer, and a switch means performing a switchover for changing the ratio of the number of turns of the primary coil 10A to that of the secondary coil 10B of the insulating transformer 10 and a switchover for changing a capacitance value by selecting one or more arbitrary capacitors from among the plural compensation capacitors 7A to 7C.
COPYRIGHT: (C)1995,JPO

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【産業上の利用分野】本発明は配電線搬送通信用結合フィルタ装置に関し、特に、配電線の線路インピーダンスが変化しても容易に整合が図れるようにして、現場において線路状況に応じた最適伝送特性が得られるようにした配電線搬送通信用結合フィルタ装置に関する。 The present invention relates to an electrical distribution line carrier communication coupling filter device, in particular, the optimum transmission line impedance of the power distribution lines as attained even easily matched vary, depending on line conditions in the field characteristics relating to distribution line carrier communication coupling filter apparatus that is obtained.

【0002】 [0002]

【従来の技術】最近、給電制御や系統保護、更には需要家の電力量計の自動検針等の用途に対して、高圧配電線等の配電線を信号伝送路として利用する配電線搬送通信が広く用いられており、中でも経済的な線路大地間結合方式が最も普及している。 Recently, power supply control and system protection, even for applications for automatic meter reading or the like of the customer of the electricity meter, the distribution line carrier communication using the distribution lines, such as high-voltage distribution line as a signal transmission line widely used and are the most popular coupling method between among them economical line ground.

【0003】線路大地間結合方式は、配電線と大地間に送受信機を結合させて情報伝送を行うもので、送受信機として、例えば、図5に示すような結合フィルタ装置が用いられている。 [0003] between the lines ground coupling method, by coupling a transceiver between distribution line and ground and performs information transmission, as a transceiver, for example, coupling the filter devices are used as shown in FIG.

【0004】この結合フィルタ装置は、送信側の回路を簡略的に示しており、角周波数ω,送信電圧Eの搬送信号を出力する送信電源1,内部抵抗2,及び内部静電容量を構成するコンデンサ3,変成器4を構成する一次巻線4Aより成る信号発生回路と、配電線6に接続された直列コンデンサ5,直列コンデンサ5と大地間に挿入されていると共に変成器4を構成する二次巻線4Bより成る結合回路を備え、電源回路と結合回路が結合係数kの変成器4で結合されて構成されている。 [0004] The coupling filter apparatus is schematically illustrates a circuit of the transmitting side, the angular frequency omega, transmission power 1 for outputting a carrier signal of the transmission voltage E, constituting the internal resistor 2, and the internal capacitance capacitor 3, the two constituting a signal generating circuit consisting of the primary winding 4A constituting the transformer 4, a series capacitor 5 is connected to a distribution line 6, a transformer 4 with being inserted between the series capacitor 5 and the ground comprising a coupling circuit consisting of primary winding 4B, coupling circuit is configured to be coupled in transformer 4 of the coupling coefficient k and the power supply circuit.

【0005】このような結合フィルタ装置において、フィルタの所要特性として帯域通過形で、帯域の利得が大きく、且つ、平坦であることが必要であり、従って、結合フィルタ装置は配電線6の線路インピーダンスに対する共振角周波数において上記した条件に適合するように各回路定数を予め設定して設計されている。 [0005] In such a join filter device, a band pass type as desired characteristics of the filter, the gain of the band is large, and is required to be flat, thus, is coupled filter device line impedance of the distribution line 6 It is designed by setting the circuit constants in advance to suit the conditions described above in resonance angular frequencies for.

【0006】すなわち、抵抗2の抵抗値をR 1 ,コンデンサ3の静電容量をC 1 ,一次巻線4AのインダクタンスをL 1 ,二次巻線4BのインダクタンスをL 2 ,結合コンデンサ5の静電容量をC 2 ,線路インピーダンスをR 2 ,及びインピーダンス整合時の線路インピーダンスR 0に対する共振角周波数をω 0としたとき、上記回路における整合特性を得るための各定数関係は、 Namely, the resistance of the resistor 2 R 1, C 1 and the capacitance of the capacitor 3, inductance L 1 of the primary winding 4A, 2 the inductance of the secondary winding 4B L, electrostatic coupling capacitors 5 when the capacitance was C 2, the line impedance R 2, and omega 0 a resonant angular frequency for line impedance R 0 of the time of the impedance matching, the constants related to obtaining a matching characteristic of the circuit,

【数2】 [Number 2]

【数3】 [Number 3]

【数4】 [Number 4] 1 =Q 2 (4) kQ=1 (5) であり、結合係数kは帯域巾によって決まり、上限周波数/下限周波数=2の場合、略0.6〜0.7の値である。 Q 1 = Q 2 (4) kQ = a 1 (5), the coupling coefficient k is determined by the bandwidth, if the upper limit frequency / lower limit frequency = 2, a value of approximately 0.6 to 0.7. 高圧配電線用の結合コンデンサ5は、現在、0.0 Coupling capacitor 5 for high pressure distribution line is now 0.0
1μFと0.05μFが標準化されているため、上式から帯域巾によりkが決まり、ω 0 ,C 2が指定されると、(5),(3),(1) の各式より Since 1μF and 0.05μF are standardized, determines k by bandwidth from the above equation, omega 0, when C 2 is specified, (5), (3), from the equations (1)

【数5】 [Number 5] としてR 2が決まり、これ以外のR 2の値では整合から外れることになる。 As determines R 2, it is excluded from the alignment with other values of R 2.

【0007】 [0007]

【発明が解決しようとする課題】しかし、従来の配電線搬送通信用結合フィルタ装置によると、配電線の線路インピーダンスに対する共振角周波数において上記した条件に適合するように各回路定数を予め設定しているため、設定時に用いた特定の線路インピーダンスのみに限定され、それ以外の線路インピーダンスを有する線路には整合を取ることができないという不都合がある。 [SUMMARY OF THE INVENTION However, according to the conventional distribution line carrier communication coupling filter device, to preset circuit constants to conform with the conditions described above in resonance angular frequencies for the line impedance of the distribution line are therefore limited to only a specific line impedance that used during configuration, the line has the disadvantage that can not reconcile the having a line impedance otherwise.

【0008】すなわち、高圧配電線等の配電線は送電線に比べてその状態が複雑であり、線路の分岐や新設,改廃等が頻繁に行われることから、線路の伝送特性、つまり、線路インピーダンスが大幅に変化する。 Namely, distribution lines, such as high-voltage distribution line is the state is more complicated than in the transmission line, branch or new line, since the abolition or the like is frequently performed, the transmission characteristics of the line, i.e., line impedance changes significantly. 従って、配電線の線路インピーダンスに応じて予め各回路定数を設定しておいていても、線路インピーダンスが変化した場合にはインピーダンス整合が取れなくなる。 Therefore, even if allowed to set the circuit constants in advance according to the line impedance of the distribution line, impedance matching becomes impossible to take when the line impedance is changed.

【0009】図6には、図5で説明した回路において線路インピーダンスR 2 =mR 0として、mが0.1, [0009] Figure 6 is a line impedance R 2 = mR 0 in the circuit described in FIG. 5, m is 0.1,
1,10に変化した場合の線路送出電力P(E 2 /4R When changed to 1, 10 lines delivered power P (E 2 / 4R
1 )Gにおける基準化角周波数(ω/ω 0 )に対するG 1) G for the normalized angular frequency at G (ω / ω 0)
特性が示されている。 Characteristics are shown. これより明らかなように、m=1 As this is clear, m = 1
の特性は整合特性であって、所要の特性を満足しているが、線路インピーダンスが大幅に変化したとき、その伝送特性は悪化して不適合になっていることが判る。 The characteristics a matching characteristics, but which satisfies the required properties, when the line impedance is changed significantly, its transmission characteristics it can be seen that worse has become irrelevant.

【0010】従って、本発明の目的は配電線の線路インピーダンスが変化した場合でも容易に整合が図れ、現場において線路状況に応じた最適伝送特性を得ることができる配電線搬送通信用結合フィルタ装置を提供することである。 It is therefore an object of the present invention Hakare easily aligned even if the line impedance of the distribution line is changed, the optimal transmission characteristics can be obtained distribution line carrier communication coupling filter device according to the line situation in the field it is to provide.

【0011】 [0011]

【課題を解決するための手段】本発明は上記問題点に鑑み、配電線の線路インピーダンスが変化した場合でも容易に整合が図れ、現場において線路状況に応じた最適伝送特性を得るため、変成器の二次巻線の一端と直列コンデンサの間に設けられた絶縁変圧器と、絶縁変圧器の二次巻線と変成器の二次巻線の間に設けられ、所定の静電容量を有する複数の補償コンデンサと、絶縁変圧器の一次巻線と二次巻線の巻数比を変える切り換えと、前記複数の補償コンデンサから1つ以上の任意のコンデンサを選択して静電容量値を変える切り換えを行う切換手段を備えた配電線搬送通信用結合フィルタ装置を提供するものである。 The present invention SUMMARY OF] In view of the above problems, because the line impedance of the distribution line is Hakare easily aligned even if the varied to obtain the optimum transmission characteristics corresponding to the line situation in the field, the transformer an insulation transformer provided between the one end and a series capacitor of the secondary winding of, disposed between the secondary winding of the transformer and the secondary winding of the isolation transformer has a predetermined capacitance switching changing a plurality of compensation capacitors, and switching for changing the turns ratio of the primary winding and the secondary winding of the isolation transformer, the capacitance value by selecting any capacitor of one or more of the plurality of compensation capacitors there is provided a distribution line carrier communication coupling filter apparatus provided with a switching means for performing.

【0012】上記切換手段は、直列コンデンサの静電容量をC 2 ,インピーダンス整合時の前記配電線のインピーダンスをR 0 ,選択された前記1つ以上の任意のコンデンサの静電容量をC Sとし、前記配電線の線路インピーダンスがaをパラメータとしてaR 0に変化した時、 [0012] The switching means, and C 2 the capacitance of the series capacitor, R 0 the impedance of the power distribution line at the time of the impedance matching, the electrostatic capacitance of the one or more optional capacitor and the selected C S when the line impedance of the distribution line is changed to aR 0 a as a parameter,
前記巻線比が The winding ratio

【数6】 [6] となるように、また、前記静電容量C Sがbを定数としてC s =abC 2 /(a−b)になるようにそれぞれ連動して切り換えを行う構成を有している。 As will be also has a configuration in which the electrostatic capacitance C S C s = abC 2 / (a-b) to become so in conjunction respectively switched as constants is b.

【0013】また、上記絶縁変圧器は、その一次巻線と並列に接続された単巻変圧器を有していても良く、その場合、切換手段は単巻変圧器のタップを切り換えるようにすることが好ましい。 Further, the isolation transformer may have a single winding transformer connected in parallel with the primary winding, in which case the switching means to switch the taps of autotransformer it is preferable. また、直列コンデンサは並列接続された3個のコンデンサより構成して、三相の配電線に接続するようにしても良い。 Also, the series capacitor constitutes from three capacitors connected in parallel, may be connected to the distribution line of the three phases.

【0014】 [0014]

【実施例】以下、本発明の配電線搬送通信用結合フィルタ装置について添付図面を参照しながら詳細に説明する。 EXAMPLES Hereinafter, will be described in detail with reference to the accompanying drawings distribution line carrier communication coupling filter device of the present invention.

【0015】図1には、本発明の一実施例の結合フィルタ装置の回路構造が示されている。 [0015] Figure 1 shows a circuit structure of the binding filter device of one embodiment of the present invention. この図において、図5と同一の部分には同一の引用数字,符号を付したので重複する説明は省略する。 In this figure, same reference numerals to the same parts as in FIG. 5, overlap since reference numeral description thereof will be omitted.

【0016】この結合フィルタ装置は、変成器4を隔てて配置される信号発生回路と切換回路を収容した地上箱14と、結合回路を収容した柱上箱15を有して構成されている。 [0016] The coupling filter device includes a ground box 14 accommodating the signal generating circuit and a switching circuit which is arranged at a transformer 4, and is configured with a pillar upper box 15 accommodating the coupling circuit.

【0017】地上箱14においては、変成器4の二次巻線4Bの一方に並列に接続された静電容量が異なる複数の補償コンデンサ7A,7B,7Cと、これらの補償コンデンサ7A,7B,7Cのリード端子9A,9B,9 [0017] In terrestrial box 14, transformer fourth capacitance connected in parallel to one of the secondary winding 4B is different compensation capacitors 7A, 7B, and 7C, these compensation capacitors 7A, 7B, 7C of the lead terminals 9A, 9B, 9
Cと、後述する絶縁変圧器の二次巻線に接続されたリード端子11A,11B,11Cと、リード端子9A,9 And C, and the lead terminal 11A connected to the secondary winding of the isolation transformer to be described later, 11B, and 11C, the lead terminals 9A, 9
B,9Cとリード端子11A,11B,11Cを連動して切り換える切換スイッチ8より構成された切換回路と、電圧計(図示せず)がそれぞれ接続される端子12 B, terminals 9C and the lead terminals 11A, 11B, and a switching circuit which is composed of changeover switch 8 for switching in conjunction with 11C, voltmeter (not shown) are connected respectively 12
A,12B,及び13A,13Bを有している。 A, has 12B, and 13A, the 13B.

【0018】一方、柱上箱15においては、直列コンデンサ5と大地電位に接続された一次巻線10Aと、所定のタップ位置にリード端子11A,11B,11Cが接続された二次巻線10Bより成る絶縁変圧器10を有している。 Meanwhile, in the pillar upper box 15 includes a primary winding 10A connected to the series capacitor 5 and the ground potential, the lead terminal 11A to a predetermined tap location, 11B, from the secondary winding 10B of 11C is connected It has an insulating transformer 10 composed.

【0019】切換スイッチ8は、直列コンデンサ5の静電容量をC 2 ,配電線6の整合時のインピーダンスをR The changeover switch 8, C 2 the capacitance of series capacitor 5, the impedance at the time of matching of the distribution line 6 R
0 ,補償コンデンサ7A,7B,7Cの選択されたコンデンサの静電容量をC sとし、配電線6の線路インピーダンスがaをパラメータとしてaR 0に変化した場合、 0, compensation capacitor 7A, 7B, the electrostatic capacitance of a selected capacitor 7C and C s, if the line impedance of the distribution line 6 is changed to aR 0 a as a parameter,
絶縁変圧器10の一次巻線10Aと二次巻線10Bの巻数比が、一次巻線10Aを1としたとき When the turns ratio of the primary winding 10A and the secondary winding 10B of the insulating transformer 10, which was 1 primary winding 10A

【数7】 [Equation 7] となるように、また、補償コンデンサ7の静電容量C s Become such, also, the capacitance C s of the compensation capacitor 7
がbを定数としてC s =abC 2 /(a−b)となるように、リード端子11A,11B,11Cと、リード端子9A,9B,9Cの中の1つ以上の端子に連動して切り換わるようになっている。 As but a C s = abC 2 / a is a constant (a-b) b, the lead terminals 11A, 11B, and 11C, the lead terminals 9A, 9B, outright in conjunction with one or more terminals in 9C It has been switched way.

【0020】ここで、各定数を次のように設定した。 [0020] In this case, we set the constants in the following manner. (1) f 0 =7kHz (2) ω 0 =2π×7×10 3 =44×10 3 (3) k=0.65 (4) b=1 (5) C 2 =0.05×3=0.15μF (6) R 0 =98.5Ω この場合、切換スイッチ8で切り換えた時のa,R 2 (1) f 0 = 7kHz ( 2) ω 0 = 2π × 7 × 10 3 = 44 × 10 3 (3) k = 0.65 (4) b = 1 (5) C 2 = 0.05 × 3 = 0.15μF (6) R 0 = 98.5Ω this case, a time of switching in the change-over switch 8, R 2,
S ,及び絶縁変圧器10の一次巻線10Aを100% C S, and a primary winding 10A of the insulating transformer 10 100%
としたときの二次巻線10Bの巻数比β%の数値例は表1に示す通りである。 It turns ratio value of beta% example of the secondary winding 10B when the are shown in Table 1.

【表1】 [Table 1]

【0021】また、端子12A,12B,及び13A, [0021] In addition, the terminal 12A, 12B, and 13A,
13Bは、それぞれ設置現場において最良の伝送状態に設定操作する場合に使用するものであり、図示した送信側の場合は、端子13A,13Bの間に電圧計を接続して、送信電圧に対して最大電圧となるように切換スイッチ8を切り換えれば良く、受信側(図示せず)の場合は、配電線6からの一定の送信信号レベルにおいて端子12A,12Bの間に電圧計を接続して最大電圧となるように切換スイッチ8を切り換えれば良い。 13B is intended to be used when setting operation to the best transmission conditions in each installation site, in the case of the transmission side shown, by connecting a voltmeter between the terminals 13A, 13B, to the transmission voltage maximum voltage so as well be switched to the change-over switch 8, when the receiving side (not shown), the terminal 12A at the predetermined transmission signal level from the distribution line 6, by connecting a voltmeter between 12B the maximum voltage may be switched to the changeover switch 8 so that.

【0022】図2には、図1の結合フィルタ装置の等価回路が示されている。 [0022] FIG. 2 shows the equivalent circuit of the coupling filter device of FIG. この回路において、7は容量切換を行う補償コンデンサ,16は変化する線路インピーダンスで、線路インピーダンスはaR 0によって表すことができる。 In this circuit, 7 is the compensation capacitor for performing capacitance switching, 16 is a line impedance that varies, line impedance can be represented by aR 0. すなわち、R 0は一定値で整合インピーダンス値,aはパラメータで図6において説明した0.1< That, R 0 is matched impedance value at a constant value, 0.1 a is described in FIG. 6 by the parameter <
m<10に対して1<a<100に相応する。 Corresponding to 1 <a <100 against m <10. 絶縁変圧器10は Isolation transformer 10

【数8】 [Equation 8] となるように切り換え、図3に示すような等価回路を形成する。 To switch to the, to form the equivalent circuit as shown in FIG.

【0023】すなわち、可変の線路インピーダンス16 [0023] In other words, variable line impedance 16
は一定値R 0となり、直列コンデンサ5の静電容量がa Is a constant value R 0, and the capacitance of the series capacitor 5 is a
2となる。 The C 2. ここで、補償コンデンサ7の静電容量C S Here, the electrostatic capacitance C S of the compensation capacitor 7
と直列コンデンサ5の静電容量aC 2の合成容量C Combined capacity of the electrostatic capacitance aC 2 series capacitors 5 C
0を、bを任意に選んだ定数としてC 0 =bC 2とすると、補償コンデンサ7の静電容量は、 C S =abc 2 /(a−b) (7) 但し、a>b となる。 0, when C 0 = bC 2 as arbitrarily chosen constant b, the capacitance of the compensation capacitor 7, C S = abc 2 / ( a-b) (7) where the a> b. よって、補償コンデンサ7の静電容量C Sの値をaに対応して式(7) の関係に切り換えれば、配電線6 Therefore, the value of the capacitance C S of the compensation capacitor 7 in response to a be switched to the relationship of Equation (7), distribution line 6
の線路インピーダンスR 2の変化に対して変成器4の二次巻線4BのインダクタンスL 2との等価直列コンデンサbc 2は一定となるから、(1)〜(5) 式に対応して、 Since the equivalent series capacitor bc 2 to changes in line impedance R 2 and the inductance L 2 of the secondary winding 4B of the transformer 4 is constant, in response to (1) to (5),

【数9】 [Equation 9]

【数10】 [Number 10]

【数11】 [Number 11] 1 =Q 2 =Q (11) kQ=1 (12) から From Q 1 = Q 2 = Q ( 11) kQ = 1 (12)

【数12】 [Number 12] が得られ、k,ω,C 2の指定に対して、bを選定してR 0を定めることができる。 It is obtained, k, ω, for a given C 2, and selecting b can be determined R 0.

【0024】このように配電線6の線路インピーダンスがaをパラメータとしてaR 0と変わった場合、直列コンデンサ5の静電容量をC 2 ,配電線6の整合インピーダンスをR 0 ,補償コンデンサ77A,7B,7Cの選択された1つ以上のコンデンサの静電容量をC sとして、絶縁変圧器10の一次巻線10Aと二次巻線10B [0024] If the line impedance of the distribution line 6 thus has changed and aR 0 a as a parameter, C 2 the capacitance of series capacitor 5, a matching impedance R 0 of the distribution line 6, the compensation capacitor 77A, 7B , the capacitance of one or more of capacitors 7C selection as C s, primary winding 10A and the secondary winding 10B of the insulating transformer 10
の巻数比が The turns ratio of

【数13】 [Number 13] となるように、また、補償コンデンサ7の静電容量C s Become such, also, the capacitance C s of the compensation capacitor 7
がbを定数としてC s =abC 2 /(a−b)となるように切換スイッチ8で切り換えるようになっているため、現場において線路インピーダンスとの整合を図ることができ、最適伝送特性を得ることができる。 C s = abC 2 / (a -b) and for adapted to switch the changeover switch 8 so, can be matched with the line impedance in the field, to obtain the optimum transmission characteristics but b is a constant be able to.

【0025】図4には、本発明の第2の実施例が示されている。 [0025] FIG. 4 shows a second embodiment of the present invention is shown. この実施例は、3相の配電線6R,6S,6T This embodiment, three-phase distribution line 6R, 6S, 6T
に対して直列コンデンサ5A,5B,5Cを接続して大地帰路回路を構成したものであり、絶縁変圧器10の二次側巻線10Bと接続された単巻変圧器17を地上箱1 Series capacitor 5A respect, 5B, and which was connected to 5C constitute the earth return circuit, an isolation transformer 10 secondary winding 10B and connected autotransformer 17 to ground box 1
4に設置し、そのタップにおいて間接的に絶縁変圧器1 Placed in 4 indirectly isolation transformer 1 at the tap
0の巻数比を切換スイッチ8で切り換えるようになっている。 The turns ratio of 0 is adapted to switch the change-over switch 8.

【0026】 [0026]

【発明の効果】以上説明した通り、本発明の配電線搬送通信用結合フィルタ装置によると、変成器の二次巻線の一端と直列コンデンサの間に設けられた絶縁変圧器と、 As described in the foregoing, according to the distribution line carrier communication coupling filter device of the present invention, an isolation transformer is provided between one end and a series capacitor of the transformer secondary winding,
絶縁変圧器の二次巻線と変成器の二次巻線の間に設けられ、所定の静電容量を有する複数の補償コンデンサと、 Is provided between the secondary winding of the transformer and the secondary winding of the isolation transformer, and a plurality of compensation capacitors having a predetermined capacitance,
絶縁変圧器の一次巻線と二次巻線の巻数比を変える切り換えと、前記複数の補償コンデンサから1つ以上の任意のコンデンサを選択して静電容量値を変える切り換えを行う切換手段を備えているため、配電線の線路インピーダンスが変化した場合でも容易に整合が図れ、現場において線路状況に応じた最適伝送特性を得ることができる。 Comprising a switching changing the turns ratio of the primary winding and the secondary winding of the isolation transformer, a switching means for switching to change the capacitance value by selecting one or more optional capacitor from said plurality of compensation capacitors and for that, it is possible to line impedance of the distribution line is Hakare easily aligned even if the varied to obtain the optimum transmission characteristics corresponding to the line situation in the field.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明の一実施例を示す回路図。 Circuit diagram showing an embodiment of the present invention; FIG.

【図2】図1の等価回路図。 FIG. 2 is an equivalent circuit diagram of Figure 1.

【図3】図2の等価回路図。 FIG. 3 is an equivalent circuit diagram of FIG. 2.

【図4】本発明の第2の実施例を示す回路図。 Circuit diagram showing a second embodiment of the present invention; FIG.

【図5】従来の配電線搬送通信用結合フィルタ装置を示す回路図。 FIG. 5 is a circuit diagram showing a conventional distribution line carrier communication coupling filter device.

【図6】従来の配電線搬送通信用結合フィルタ装置に係る線路インピーダンスが変化した場合の伝送特性の変化を表すグラフ。 Figure 6 is a graph line impedance of the conventional distribution line carrier communication coupling filter apparatus showing a change in transmission characteristics when the change.

【符号の説明】 DESCRIPTION OF SYMBOLS

1 送信電源 2 内部抵抗 3 コンデンサ 4 変成器 4A 一次巻線 4B 二次巻線 5 直列コンデンサ 6 配電線 7(7A,7B,7C) 補償コンデンサ 8 切換スイッチ 9A,9B, 1 transmission power 2 internal resistance 3 capacitor 4 transformer 4A primary winding 4B secondary winding 5 series capacitor 6 distribution line 7 (7A, 7B, 7C) compensation capacitor 8 over switch 9A, 9B,
9C リード端子 10 絶縁変圧器 10A 一次巻線 10B 二次巻線 11A,11B、11C リード端子 12A,12B,13A,13B 端子 14 地上箱 15 柱上箱 9C lead terminal 10 insulated transformer 10A primary winding 10B secondary windings 11A, 11B, 11C lead terminals 12A, 12B, 13A, 13B terminal 14 ground box 15 poster on week

───────────────────────────────────────────────────── フロントページの続き (72)発明者 清水 祐一 東京都千代田区内幸町1丁目1番3号 東 京電力株式会社内 (72)発明者 畔上 豊利 東京都千代田区内幸町1丁目1番3号 東 京電力株式会社内 ────────────────────────────────────────────────── ─── of the front page continued (72) inventor Yuichi Shimizu, Chiyoda-ku, tokyo Uchisaiwaicho 1 chome No. 3 TEPCO within Co., Ltd. (72) inventor Unegami YutakaToshi, Chiyoda-ku, tokyo Uchisaiwaicho 1 chome No. 3 Tokyo power within Co., Ltd.

Claims (3)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 変成器の一次巻線が送信電源に接続され、且つ、二次巻線の一端が直列コンデンサを介して配電線に、また、他端が大地電位に接続された配電線搬送通信用結合フィルタ装置において、 前記変成器の二次巻線の一端と前記直列コンデンサの間に設けられた絶縁変圧器と、 前記絶縁変圧器の二次巻線と前記変成器の二次巻線の間に設けられ、所定の静電容量を有する複数の補償コンデンサと、 前記絶縁変圧器の一次巻線と二次巻線の巻数比を変える切り換えと、前記複数の補償コンデンサから1つ以上の任意のコンデンサを選択して静電容量値を変える切り換えを行う切換手段を備え、 前記切換手段は、前記直列コンデンサの静電容量をC 2 ,インピーダンス整合時の前記配電線のインピーダンスをR 0 ,選択された前記1つ 1. A transformer primary winding is connected to the transmission power, and, in the distribution line one end of the secondary winding via a series capacitor, also distribution line carrier whose other end is connected to ground potential in communication coupling filter device, an isolation transformer is provided between one end and the series capacitor of the transformer secondary winding, the secondary winding of the transformer and the secondary winding of the isolation transformer provided between a plurality of compensation capacitors having a predetermined capacitance, the primary winding of the isolation transformer and the switching of changing the turns ratio of the secondary winding, one or more of the plurality of compensation capacitors comprising a switching means for switching to change the capacitance value by selecting any capacitor, the switching means, the electrostatic capacity C 2 of the series capacitor, the impedance of the power distribution line at the time of the impedance matching R 0, wherein a selected one 上の任意のコンデンサの静電容量をC Sとし、前記配電線の線路インピーダンスがaをパラメータとしてaR 0に変化した時、前記巻線比が 【数1】 The capacitance of any capacitor above the C S, when the line impedance of the distribution line is changed to aR 0 to a as a parameter, the turns ratio is ## EQU1 ## となるように、また、前記静電容量C Sがbを定数としてC s =abC 2 /(a−b)になるようにそれぞれ連動して切り換えを行う構成を有していることを特徴とする配電線搬送通信用結合フィルタ装置。 And so that, also, and characterized by having a configuration in which the electrostatic capacitance C S C s = abC 2 / (a-b) to become so in conjunction respectively switched as constants is b distribution line carrier communication coupling filter apparatus.
  2. 【請求項2】 前記絶縁変圧器は、その一次巻線と並列に接続された単巻変圧器を有し、 前記直列コンデンサは、三相の配電線に接続される3個のコンデンサより構成されている構成の請求項1の配電線搬送通信用結合フィルタ装置。 Wherein said isolation transformer has a single winding transformer connected in parallel with the primary winding, the series capacitor is composed of three capacitors connected to the distribution line of the three-phase and has distribution line carrier communication coupling filter device according to claim 1 of configuration.
  3. 【請求項3】 所定の搬送周波数の搬送信号を発生する信号発生回路と、 前記信号発生回路に所定の結合比を有した変成器によって結合して前記搬送信号を入力する切換回路と、 前記切換回路に入力した前記搬送信号を直列コンデンサを介して配電線へ注入する絶縁変圧器を有した結合回路と、 前記切換回路は前記絶縁変圧器の一次巻線,及び二次巻線の巻数比を変える巻数比切換手段と、前記巻数比切換手段と連動して内部に配置された補償コンデンコの静電容量値を変える容量値切換手段を備え、 前記信号発生回路,前記変成器,前記切換回路,前記結合回路,及び前記直列コンデンサの合成インピーダンスと整合していた配電線の線路インピーダンスがその整合値よりある変化値だけ変化したとき、その変化値に応じて前記巻数比切 3. A signal generating circuit for generating a carrier signal of a predetermined carrier frequency, and switching circuit for receiving the carrier signal coupled by transformer having a predetermined coupling ratio to the signal generating circuit, the switching a coupling circuit having an isolation transformer for injecting said carrier signal input to the circuit to the distribution line through a series capacitor, the switching circuit said insulating transformer primary winding, and the winding ratio of the secondary winding a turns ratio switching means for changing comprises a capacitance value switching means varying the capacitance value of the compensation Kondenko disposed therein in conjunction with the turns ratio switching means, said signal generating circuit, the transformer, the switching circuit, the coupling circuit, and when the line impedance of the combined impedance with matched have a distribution line of the series capacitor is changed by changing values ​​in than its matching value, the turns ratio switching in accordance with the change value 手段が前記巻数比を変えると共に、前記容量値切換手段が前記容量値を変えてインピーダンス整合を実現するように構成されていることを特徴とする配電線搬送通信用結合フィルタ装置。 It means together with the changing the turns ratio, the capacitance value switching means the capacitance value distribution line carrier communication coupling filter apparatus characterized by being configured to implement impedance matching by changing the.
JP34675793A 1993-12-22 1993-12-22 Coupling filter device for distribution line carrier communication Pending JPH07183836A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP34675793A JPH07183836A (en) 1993-12-22 1993-12-22 Coupling filter device for distribution line carrier communication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP34675793A JPH07183836A (en) 1993-12-22 1993-12-22 Coupling filter device for distribution line carrier communication

Publications (1)

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JPH07183836A true JPH07183836A (en) 1995-07-21

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