JP2007282452A - Disconnection detecting system of power line - Google Patents

Disconnection detecting system of power line Download PDF

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JP2007282452A
JP2007282452A JP2006109047A JP2006109047A JP2007282452A JP 2007282452 A JP2007282452 A JP 2007282452A JP 2006109047 A JP2006109047 A JP 2006109047A JP 2006109047 A JP2006109047 A JP 2006109047A JP 2007282452 A JP2007282452 A JP 2007282452A
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distribution line
unit
power
disconnection
measuring
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Ikuo Oka
育良 岡
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Chugoku Electric Power Co Inc
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems

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  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Locating Faults (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disconnection detecting system of a power line which can detect the disconnection of a power line, at an early stage with small investment for a plant. <P>SOLUTION: The disconnection detecting system 1 for the power line is provided with a plurality of meters 5a-5f, with communication functions for measuring power supplied from the power line and having a communication unit for transmitting the data; and a control office 6 capable of receiving the data transmitted from each of the meters with communication functions. Each of the meters 5a-5f with a communication functions has a voltage detecting section for detecting of voltage of each phase of the power line, and a determining section for determining a disconnection portion on the basis of a result of detection in the voltage detecting section. The meters 5a-5f each transmit results of determination by the determining section from the communication section to the control office. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、変電所から需要者に電力を供給する配電線における断線を検出するシステムに関する。   The present invention relates to a system for detecting a disconnection in a distribution line that supplies power from a substation to a consumer.

従来、高圧配電線が断線し、配電線事故に至らなかった場合、断線箇所は、主に需要者からの報告を受けて電力会社の巡視員が現地調査を行うことで発見している。しかしながら、配電線が断線した状態でも、変電所のリレーが感知せず送電を継続している場合があり、断線した電線が対地に触れない状態になっているならば公衆感電の危険性がある。また、三相の配電線が一線断線した欠相状態で送電した場合、配電線下位の工場等における三相の誘導モータが単相運転になり、焼損する恐れもある。   Conventionally, when a high-voltage distribution line is disconnected and a distribution line accident has not occurred, the location of the disconnection has been discovered mainly by receiving a report from a customer and conducting a field survey by a power company patrolperson. However, even if the distribution line is disconnected, the substation relay may not detect the power transmission and may continue to transmit power. If the disconnected line does not touch the ground, there is a risk of public electric shock. . In addition, when power is transmitted in a state where the three-phase distribution line is disconnected, the three-phase induction motor in a factory below the distribution line becomes single-phase operation and may be burned out.

そこで、下記の特許文献１では、需要者の家庭用電気器具等を接続する電源コンセントから停電情報を検出し、専用の送信端末装置を用いて断線情報を監視センターに通報する断線検出装置が提案されている。これは、センターに設置された受信装置と、需要者宅の送信端末装置とから構成され、需要家の電源コンセントに送信端末装置の電源プラグを接続し、断線情報を直ちに検出して電話線を通じて受信装置へ自動送信するものである。
実用新案登録第３０４３４５８号公報 Therefore, in Patent Document 1 below, a disconnection detection device that detects power outage information from a power outlet connecting a consumer electric appliance of a consumer and reports the disconnection information to a monitoring center using a dedicated transmission terminal device is proposed. Has been. This consists of a receiving device installed in the center and a transmitting terminal device at the customer's house, connecting the power plug of the transmitting terminal device to the power outlet of the consumer, and detecting the disconnection information immediately and through the telephone line It is automatically transmitted to the receiving device.
Utility Model Registration No. 3043458

しかしながら、特許文献１の装置では、家庭の電源コンセントから停電情報を得るようにしているので、屋内機器又は配線の故障、或いは送信端末装置の電源プラグが電源コンセントから外れている等の不具合が生ずることがあり、それらによって誤報となる場合が多い。また、家庭用コンセントは単相であるから、３相の断線情報が得られないこと、加えて専用の送信端末装置が必要という問題がある。   However, in the device of Patent Document 1, power failure information is obtained from a household power outlet, so that problems such as failure of indoor equipment or wiring or disconnection of the power plug of the transmission terminal device from the power outlet occur. And often results in false alarms. In addition, since the household outlet is single-phase, there is a problem in that 3-phase disconnection information cannot be obtained, and in addition, a dedicated transmission terminal device is required.

本発明は、上記事情に鑑み、設置費用が少なく、配電線における断線を早期発見できる配電線の断線検出システムと、該システムに使用する通信機能付き計量器を提供することを目的とする。   In view of the circumstances described above, an object of the present invention is to provide a distribution line breakage detection system that can be detected at an early stage with a low installation cost, and a measuring instrument with a communication function used in the system.

本発明は、変電所から需要者に電力を供給する配電線における断線を検出するシステムであって、配電線に接続された複数の通信機能付き計量器と、該複数の通信機能付き計量器から送信された信号を受信可能な管理所とを備え、通信機能付き計量器は、配電線により供給される電力を計量する電力計量部と、配電線の各相の電圧を検出する電圧検出部と、該電圧検出部での検出結果に基づいて断線箇所を判定する判定部と、該判定部による判定結果を管理所に送信する通信部とを有することを特徴とする。   The present invention is a system for detecting disconnection in a distribution line that supplies power to a consumer from a substation, and includes a plurality of measuring devices with communication function connected to the distribution line, and the plurality of measuring devices with communication function. A meter capable of receiving the transmitted signal, and a measuring instrument with a communication function, a power metering unit that measures the power supplied by the distribution line, a voltage detection unit that detects the voltage of each phase of the distribution line, and And a determination unit that determines a disconnection location based on a detection result of the voltage detection unit, and a communication unit that transmits a determination result by the determination unit to a management office.

また、本発明の通信機能付き計量器は、変電所から需要者に電力を供給する配電線に接続され、配電線により供給される電力を計量する電力計量部と、該電力計量部で計量した電力量データを管理所に送信する通信部とを有する通信機能付き計量器であって、配電線の各相の電圧を計量する電圧検出部と、該電圧検出部での検出結果に基づいて断線箇所を判定する判定部とを備え、前記判定部による判定結果を前記通信部から管理所に送信することを特徴とする。   The measuring instrument with a communication function of the present invention is connected to a distribution line that supplies power from a substation to a consumer, and measures a power measuring unit that measures the power supplied by the distribution line, and the power measuring unit measures the power. A measuring device with a communication function having a communication unit for transmitting electric energy data to a management office, a voltage detecting unit for measuring a voltage of each phase of the distribution line, and a disconnection based on a detection result in the voltage detecting unit A determination unit for determining a location, and transmitting a determination result by the determination unit from the communication unit to a management office.

本発明の断線検出システムによれば、各通信機能付き計量器は、配電線により供給される電力を計量し、そのデータを送信する通信部を有するので、電圧検出部で計量された電圧を判定部において判定し、その判定結果を上記通信部から管理所に送信することができ、これによって配電線における断線を早期発見することができる。   According to the disconnection detection system of the present invention, each measuring instrument with a communication function has a communication unit that measures the power supplied by the distribution line and transmits the data, so that the voltage measured by the voltage detection unit is determined. The determination result can be transmitted from the communication unit to the management office, whereby the disconnection in the distribution line can be detected early.

また、本発明の通信機能付き計量器によれば、電圧検出部で計量された電圧に基づいて断線箇所を判定した結果を、計量した電力量データを送信する通信部から送信するように構成されるので、設置費用が少なく、配電線の断線を早期発見できる。   Further, according to the measuring instrument with a communication function of the present invention, the result of determining the disconnection location based on the voltage measured by the voltage detection unit is configured to be transmitted from the communication unit that transmits the measured electric energy data. Therefore, the installation cost is low, and disconnection of the distribution line can be detected early.

図１は、実施例の配電線の断線検出システムを示す。   FIG. 1 shows a disconnection detection system for a distribution line according to an embodiment.

配電線の断線検出システム１は、変電所２と、需要者３ａ〜３ｄと、変電所から各需要者へ電力を供給する配電線４と、配電線４上の所定の箇所に設けられた通信機能付き計量器５ａ〜５ｆと、通信機能付き計量器５ａ〜５ｆからのデータを受信する自動検針管理所６と、自動検針管理所６からのデータを受信する配電線系統管理所７を備える。   The distribution line disconnection detection system 1 includes a substation 2, consumers 3 a to 3 d, a distribution line 4 that supplies power from the substation to each consumer, and communications provided at predetermined locations on the distribution line 4. It comprises a function-equipped measuring instrument 5a to 5f, an automatic meter reading management station 6 that receives data from the measuring instrument with communication function 5a to 5f, and a distribution line system management station 7 that receives data from the automatic meter reading management station 6.

配電線４は、変電所２からの電力を複数の需要者３ａ〜３ｄに供給するために分岐し、各分岐点の上位及び各需要者３ａ〜３ｄの上位には、通信機能付き計量器５ａ〜５ｆを配置する。   The distribution line 4 branches to supply power from the substation 2 to a plurality of consumers 3a to 3d, and a meter 5a with a communication function is provided above each branch point and above each consumer 3a to 3d. Place ~ 5f.

図１において、変電所２に接続された第一配電線４ａは、これに配置された計量器５ａの下位において第二、第三の配電線４ｂ，４ｃへ分岐する。第二配電線４ｂは、計量器５ｂの下位において第四、第五の配電線４ｄ，４ｅへ分岐する。第四配電線４ｄは、計量器５ｃの下位において第一需要家３ａに接続し、第五配電線４ｅは、計量器５ｄの下位において第二需要家３ｂに接続する。   In FIG. 1, the 1st distribution line 4a connected to the substation 2 branches to the 2nd, 3rd distribution lines 4b and 4c in the low order of the measuring device 5a arrange | positioned at this. The 2nd distribution line 4b branches to the 4th, 5th distribution lines 4d and 4e in the low rank of the measuring instrument 5b. The fourth distribution line 4d is connected to the first consumer 3a below the measuring instrument 5c, and the fifth distribution line 4e is connected to the second consumer 3b below the measuring instrument 5d.

第三配電線４ｃは、第六、第七の配電線４ｆ，４ｇへ分岐する。第六配電線４ｆは、計量器５ｅの下位において需要家３ｃに接続する。また、第七配電線４ｇは計量器５ｆの下位において需要家３ｄに接続する。   The third distribution line 4c branches to the sixth and seventh distribution lines 4f and 4g. The sixth distribution line 4f is connected to the consumer 3c at the lower level of the measuring instrument 5e. In addition, the seventh distribution line 4g is connected to the consumer 3d below the measuring instrument 5f.

図１の配電線において、例えば、計量器５ａ，５ｂ，５ｅ，５ｆは断線を判定せず、計量器５ｃ，５ｄが断線を判定した場合には、後者の計量器５ｃ，５ｄの上位に断線箇所があると考えられる。すなわち、断線箇所Ｆ１は、その上位配電線４ｂにおける計量器５ｂ以下の区間にあると判定できる。   In the distribution line of FIG. 1, for example, when the measuring devices 5a, 5b, 5e, and 5f do not determine disconnection, and the measuring devices 5c and 5d determine disconnection, the disconnection is performed above the latter measuring devices 5c and 5d. There seems to be a place. That is, it can be determined that the disconnection point F1 is in the section below the measuring instrument 5b in the upper distribution line 4b.

同様に、計量器５ａ，５ｂ，５ｃ，５ｄ，５ｅが断線判定なしで、計量器５ｆのみが断線判定した場合には、計量器５ｆの上位に断線箇所があることがわかる。すなわち、断線箇所Ｆ２は、第七配電線４ｇにおける計量器５ｆの上位の区間にあると判定できる。   Similarly, when the measuring instruments 5a, 5b, 5c, 5d, and 5e are not judged to be disconnected, and only the measuring instrument 5f is judged to be disconnected, it can be seen that there is a disconnection point above the measuring instrument 5f. That is, it can be determined that the disconnection point F2 is in the upper section of the measuring instrument 5f in the seventh distribution line 4g.

図２は、実施例の通信機能付き計量器５の内部構成を示す。   FIG. 2 shows an internal configuration of the measuring instrument 5 with a communication function of the embodiment.

通信機能付き計量器５は、配電線に接続され、配電線の電力を計量する電力計量部１１と、配電線の各相の電圧を検出する電圧検出部１２と、この電圧検出部１２での検出結果に基づいて断線箇所を判定する判定部１３と、その判定結果及び電力計量部１１による計量データを自動検針管理所６に送信する通信部１４とを有する。   The measuring function-equipped measuring device 5 is connected to the distribution line, and includes a power measurement unit 11 that measures the power of the distribution line, a voltage detection unit 12 that detects the voltage of each phase of the distribution line, and the voltage detection unit 12 It has the determination part 13 which determines a disconnection location based on a detection result, and the communication part 14 which transmits the measurement data by the determination result and the electric power measurement part 11 to the automatic meter-reading management place 6.

電力計量部１１は、通常の量計器としての機能である電力量を自動的に計量する回路で構成されている。ここで計量した電力データは、通信部１４を通じて自動検針管理所６に送信される。   The power metering unit 11 is composed of a circuit that automatically measures the amount of power, which is a function as a normal meter. The electric power data measured here is transmitted to the automatic meter reading management station 6 through the communication unit 14.

電圧検出部１２は、ａ相、ｂ相、ｃ相の各配電線に接続し、その電圧を検出する。判定部１３は、電圧検出部１２での検出結果に基づいて断線の有無を判定し、その結果を通信部１４を介して自動検針管理所６へ送信する。自動検針管理所６は、これを配電線系統管理所７へ転送する。これにより、配電線系統管理所７において、配電線の断線を早期発見できると共に、断線箇所を割り出すことができる。   The voltage detection part 12 is connected to each distribution line of a phase, b phase, and c phase, and detects the voltage. The determination unit 13 determines the presence or absence of disconnection based on the detection result of the voltage detection unit 12 and transmits the result to the automatic meter reading management office 6 via the communication unit 14. The automatic meter reading management station 6 transfers this to the distribution line system management station 7. Thereby, in the distribution line system management place 7, while being able to discover the disconnection of a distribution line at an early stage, a disconnection location can be determined.

上記のような通信機能付き計量器としては、例えば、特開平１０−１１１３２６号公報に記載されているように、電力消費側に電力測定機能及び通信機能を有する電力読取装置を、電力供給側に情報処理装置をそれぞれ設置し、電力読取装置により使用電力量を計測して情報処理装置に報告し、情報処理装置により使用電力量に対応する情報を自動的に出力するものが好適に利用できる。   As a measuring instrument with a communication function as described above, for example, as described in JP-A-10-111326, a power reading device having a power measurement function and a communication function on the power consumption side is provided on the power supply side. It is preferable to use an information processing device that is installed, measures the amount of power used by the power reading device, reports the information to the information processing device, and automatically outputs information corresponding to the amount of power used by the information processing device.

次に、図３を参照して、電圧検出部１２において相間電圧を利用して断線を検出する方法を説明する。   Next, with reference to FIG. 3, a method for detecting disconnection using the interphase voltage in the voltage detection unit 12 will be described.

まず、ａ相、ｂ相、ｃ相の各相間電圧Ｅａ，Ｅｂ，Ｅｃを測定する。この際、例えばＥｂ及びＥｃが検出され、Ｅａが検出されなければ、ａ相の欠相と判断する。同様に、ｂ相、ｃ相の欠相を判定できる。   First, each phase voltage Ea, Eb, Ec of a phase, b phase, and c phase is measured. At this time, for example, Eb and Ec are detected, and if Ea is not detected, it is determined that the a phase is missing. Similarly, the phase failure of the b phase and the c phase can be determined.

また、Ｅｃが検出され、Ｅａ，Ｅｂが検出されなければ、ａ相及びｂ相の欠相と判定できる。さらに、全相間電圧が検出されなければ、全停電或いは３線すべて断線と判定できる。   Further, if Ec is detected and Ea and Eb are not detected, it can be determined that the a phase and the b phase are missing. Furthermore, if the voltage between all phases is not detected, it can be determined that all power failures or all three wires are disconnected.

次に、図４を参照して、電圧検出部１２において線間電圧を利用して断線を検出する方法について説明する。   Next, with reference to FIG. 4, a method for detecting disconnection using the line voltage in the voltage detection unit 12 will be described.

まず、ａ相、ｂ相、ｃ相の各線間電圧Ｅａｂ，Ｅｂｃ，Ｅｃａを測定する。   First, each line voltage Eab, Ebc, Eca of a phase, b phase, and c phase is measured.

この際、例えば、Ｅｂｃのみが検出された場合は、ａ相の欠相と判定される。同様にｂ相、ｃ相の欠相を判定できる。   At this time, for example, when only Ebc is detected, it is determined that the phase a is missing. Similarly, the open phase of the b phase and the c phase can be determined.

しかし、この方法では、２線で断線した場合は全ての線間電圧が検出されないため、３線断線（全停電）との区別がつかないので、相間電圧と線間電圧の両方もしくは適宜の一方を測定することによって断線を判定する。   However, in this method, since all the line voltages are not detected when two lines are disconnected, it cannot be distinguished from the three-line disconnection (total power failure). The disconnection is determined by measuring

以上、図示の実施例について説明したが、本発明はこれらの実施例に限らず、実際の使用態様に合せて種々の形態や改変が可能である。   Although the illustrated embodiments have been described above, the present invention is not limited to these embodiments, and various forms and modifications can be made according to the actual usage.

実施例の配電線の断線検出システムを示す図。The figure which shows the disconnection detection system of the distribution line of an Example. 実施例の通信機能付き計量器の内部構成を示す図。The figure which shows the internal structure of the measuring device with a communication function of an Example. 図２の通信機能付き計量器の電圧検出部において、各相間電圧を測定する方法を示す図。The figure which shows the method of measuring the voltage between each phase in the voltage detection part of the measuring instrument with a communication function of FIG. 図２の通信機能付き計量器の電圧検出部において、線間電圧を測定する方法を示す図。The figure which shows the method of measuring a line voltage in the voltage detection part of the measuring instrument with a communication function of FIG.

符号の説明Explanation of symbols

１…断線検出システム、２…変電所、３ａ〜３ｄ…需要者、４，４ａ〜４ｇ…配電線、５，５ａ〜５ｆ…通信機能付き計量器、６…自動検針管理所、７…配電線系統管理所、１１…電力計量部、１２…電圧検出部、１３…判定部、１４…通信部。   DESCRIPTION OF SYMBOLS 1 ... Disconnection detection system, 2 ... Substation, 3a-3d ... Consumer, 4, 4a-4g ... Distribution line, 5, 5a-5f ... Measuring instrument with communication function, 6 ... Automatic meter-reading management center, 7 ... Distribution line System management station, 11 ... electric power metering unit, 12 ... voltage detection unit, 13 ... determination unit, 14 ... communication unit.

Claims (2)

変電所から需要者に電力を供給する配電線における断線を検出するシステムであって、
前記配電線により供給される電力を計量する電力計量部と該電力計量部で計量された電力量データを送信する通信部とを有する複数の通信機能付き計量器、及び各通信機能付き計量器から送信されたデータを受信可能な管理所を備え、
前記通信機能付き計量器は、前記配電線の各相の電圧を検出する電圧検出部と、該電圧検出部での検出結果に基づいて断線箇所を判定する判定部とを有し、該判定部による判定結果を前記通信部から前記管理所に送信することを特徴とする断線検出システム。 A system for detecting disconnection in a distribution line that supplies power from a substation to consumers,
A plurality of measuring units with a communication function having a power measuring unit for measuring the power supplied by the distribution line and a communication unit for transmitting power amount data measured by the power measuring unit; and a measuring unit with each communication function It has a management office that can receive transmitted data,
The measuring instrument with a communication function includes a voltage detection unit that detects a voltage of each phase of the distribution line, and a determination unit that determines a disconnection point based on a detection result of the voltage detection unit, the determination unit The disconnection detection system, wherein the determination result is transmitted from the communication unit to the management office. 変電所から需要者に電力を供給する配電線に接続され、前記配電線から供給される電力を計量する電力計量部と、該電力計量部で計量した電力量データを管理所に送信する通信部とを有する通信機能付き計量器であって、
前記配電線の各相の電圧を検出する電圧検出部と、該電圧検出部での検出結果に基づいて断線箇所を判定する判定部とを備え、前記判定部による判定結果を前記通信部から管理所に送信することを特徴とする通信機能付き計量器。 A power meter that is connected to a distribution line that supplies power from a substation to a consumer and measures the power supplied from the distribution line, and a communication unit that transmits power amount data measured by the power meter to a management office A measuring instrument with a communication function,
A voltage detection unit that detects a voltage of each phase of the distribution line; and a determination unit that determines a disconnection location based on a detection result of the voltage detection unit, and manages a determination result by the determination unit from the communication unit A measuring instrument with a communication function characterized by being transmitted to a place.
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Cited By (9)

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JP2009207273A (en) * 2008-02-27 2009-09-10 Tokyo Electric Power Co Inc:The System, method and program for detecting disconnection of high voltage distribution line
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Publication number Priority date Publication date Assignee Title
JP2009207273A (en) * 2008-02-27 2009-09-10 Tokyo Electric Power Co Inc:The System, method and program for detecting disconnection of high voltage distribution line
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JP2012105463A (en) * 2010-11-10 2012-05-31 Chugoku Electric Power Co Inc:The Failure determination system
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JP2015534435A (en) * 2012-09-15 2015-11-26 サウジ アラビアン オイル カンパニー GSM / GPRS system for detecting and locating high impedance faults on medium voltage distribution networks in the high resistance region
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JP2017112723A (en) * 2015-12-16 2017-06-22 関西電力株式会社 Disconnection section specification system and disconnection section specification method
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