WO2022075928A1 - Boîte de connexions intelligente munie d'un système d'avertissement précoce destiné à la surveillance en ligne d'un système de raccordement de gaines et d'accessoires de câble haute tension - Google Patents

Boîte de connexions intelligente munie d'un système d'avertissement précoce destiné à la surveillance en ligne d'un système de raccordement de gaines et d'accessoires de câble haute tension Download PDF

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Publication number
WO2022075928A1
WO2022075928A1 PCT/TR2020/050920 TR2020050920W WO2022075928A1 WO 2022075928 A1 WO2022075928 A1 WO 2022075928A1 TR 2020050920 W TR2020050920 W TR 2020050920W WO 2022075928 A1 WO2022075928 A1 WO 2022075928A1
Authority
WO
WIPO (PCT)
Prior art keywords
partial discharge
link box
box
intelligent link
cable
Prior art date
Application number
PCT/TR2020/050920
Other languages
English (en)
Inventor
Mustafa Sadeddin ERDENİZ
Original Assignee
Em Elektri̇k Malzemeleri̇ Yükleni̇m Sanayi̇ Ti̇caret Anoni̇m Şi̇rketi̇
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Em Elektri̇k Malzemeleri̇ Yükleni̇m Sanayi̇ Ti̇caret Anoni̇m Şi̇rketi̇ filed Critical Em Elektri̇k Malzemeleri̇ Yükleni̇m Sanayi̇ Ti̇caret Anoni̇m Şi̇rketi̇
Priority to GB2202088.7A priority Critical patent/GB2607143A/en
Priority to PCT/TR2020/050920 priority patent/WO2022075928A1/fr
Publication of WO2022075928A1 publication Critical patent/WO2022075928A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/02—Cable terminations
    • H02G15/06—Cable terminating boxes, frames or other structures
    • H02G15/064—Cable terminating boxes, frames or other structures with devices for relieving electrical stress
    • H02G15/068—Cable terminating boxes, frames or other structures with devices for relieving electrical stress connected to the cable shield only
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/08—Cable junctions
    • H02G15/10—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes
    • H02G15/103—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes with devices for relieving electrical stress
    • H02G15/105—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes with devices for relieving electrical stress connected to the cable shield only

Definitions

  • the invention is an Intelligent Link Box with early warning system for online monitoring of sheath bonding system and high voltage cable accessories. This invention will be used in high voltage cable systems.
  • a sheath bonding system is a system to minimize the induced circulating current and to protect insulation of HV cable outer sheath against overvoltages from lightning, switching, and fault surges.
  • Link boxes as main part of sheath bonding system are the enclosures in which bonding and grounding of sheathes of HV cable joints or terminations made through removable links. Link boxes also may contain sheath voltage limiters (SVL) to limit lightning or switching overvoltages. Link boxes are installed close to HV cable joints or terminations and may be installed in places such as underground manholes, aboveground structures/pedestals, or tunnel walls.
  • link box may fail due to exposure to the harsh environment, including moisture, heat, UV, manufacturing defect, or mechanical impact. Common failures that can be inspected externally include corrosion, physical damages, and moisture ingress. Many utilities would require that SVLs be housed in explosion proof link boxes to withstand short-circuit conditions. Some utilities have experienced some damage to their systems due to the failure of SVLs under short circuit conditions. Inappropriate selection of SVL in bonding system is a main cause of link box failure and damage to sheath of EHV cable during short circuit and transient voltages.
  • Offline maintenance methods including periodic visual inspection, contact resistance test, DC withstand test and SVL integrity tests are the common practices in HV cable industry. These methods are not able to detect the failures between periodic intervals because these periodic inspections are performed in yearly intervals (making the whole system offline is a costly and complex procedure) so any problem in cable system will be will be detected one year later in these methods.
  • New method should be able to detect the any problem instantly and warn the cable system owner to make corrective action, also new method should be simple to install & operate and also cost effective.
  • the invention aims to provide a method with different technical characteristics which brings a new perspective in this field, unlike the embodiments used in the present art.
  • Main purpose of the invention compensating the lack of a special online monitoring system for link boxes as integral part of sheath bonding system of high voltage cable systems.
  • any failure of link boxes e.g. water ingress etc.
  • intelligent link box would be equipped with a simple to operate partial discharge alarming system for online monitoring of high voltage cable accessories (joints and terminations).
  • Intelligent Link Box can be used to continuously monitor & alarm different parameters of link box including current & voltage of sheathes, number of impulse voltage incidents, water ingress, temperature & humidity, internal pressure, link box lid status, and partial discharge level of HV cable accessories. Thanks to embedded advanced decision-making algorithms, final user will only deal with simple alarms not complex data. Simple user interface integrated to SCADA system enables the operator to receive alarms concerning unusual behaviour before catastrophic failure of link boxes and cable accessories.
  • the invention is an intelligent link box with early warning system for online monitoring of sheath bonding system and high voltage cable accessories characterized by comprising;
  • An enclosure body which is a base frame for mounting internal parts and protection of internal parts against environmental conditions
  • An enclosure cover which is a cover for protecting internal components from environmental conditions
  • Partial discharge sensors to pick up partial discharge pulses, measurement of induced AC voltages in the intelligent link box, counting number of lightning impulses passing through sheath voltage limiters,
  • At least one current transformer to measure the induced AC currents in bonding system
  • At least one water sensing sensor to detect water ingress into intelligent link box
  • At least one temperature & humidity sensor to evaluate condensation issues or other abnormal condition inside intelligent link box
  • At least one pressure sensor to detect any increase of internal pressure of link box due to internal arc
  • An analog conditioning board to convert received signals from Partial discharge sensors and current transformer to readable data for main processing unit (MPU)
  • a partial discharge measuring board for conditioning, filtering, and amplification of the high frequency partial discharge signals
  • a main processing unit to process all incoming data from sensors, conditioning board and partial discharge measuring board,
  • a fiber optic media converter to convert standard data to optical data to be transmitted to control center
  • Figure 1 schematic view of invention in High Voltage cable system.
  • the invention is an intelligent link box (100) with early warning system for online monitoring of sheath bonding system and high voltage cable accessories.
  • Fig.1 shows overall structure of intelligent link box alarming & monitoring system. It can be seen that intelligent link box (100) are installed close to cable joint (101) and terminations (102). Bonding cables (203) are used to connect sheath of high voltage cables to intelligent link box (100).
  • Two remote data communication methods (between on-site intelligent link box (100) and SCADA database in control center (104)) can be used according to target project requirements.
  • a fiber optic communication method can be used when the project owner can allocate a FO line (105) for alarming system (new cable projects). If this option is not feasible then a wireless GSM/GPRS communication method can be used for intelligent link box (100). In this method it is necessary to install a GSM antenna (106) outside of link box where the GSM signals can be reached.
  • Intelligent link box (100) includes a stainless-steel enclosure body (201) and stainless-steel enclosure cover (202).
  • Enclosure body (201 ) can be seen as a base frame for mounting internal parts and protection of internal parts against environmental conditions. Bonding cables (203) are entered into link box inside through cable glands (204). Then Cross bonding of cable sheathes made by disconnectable link bars (205). These cables are star connected via sheath voltage limiters (206) inside the link box.
  • Three partial discharge sensors (207) are insulator type PD sensor with built-in HV divider which has been described in WO2019194754.
  • This sensor contains a soft ferromagnetic core with primary and secondary winding to pick up PD signals from disconnectable link bar (205) of link box connected to high voltage cable sheath.
  • This sensor also contains a HV voltage divider for measuring induced voltages in bonding system.
  • This output also can be used to provide synchronization signals for partial discharge measuring board (214). Also, output of this divider can be used for counting number of lightning impulses passing through Sheath Voltage Limiters (206) inside link boxes so condition monitoring of SVL is possible.
  • Three 20/0.1 ratio epoxy current transformers (208) are used to measure the induced currents circulating inside link boxes so sheath current monitoring of bonding system will be made. Any increase or unbalance in sheath currents will be monitored. These sensors are mounted around bonding cables (203) inside link box and are designed to measure the sheath currents during normal operating of bonding system and abnormal conditions (e.g. SVL failure that can lead to increased or unbalanced currents).
  • a water sensing sensor (209) is used inside link box to detect water ingress into link box.
  • a temperature & humidity sensor (210) is used to evaluate condensation issues or other abnormal condition inside linkbox.
  • a mechanical switch (211 ) is embedded in lid of enclosure body (201) to show the open/close statues of lid, this data can be used to check the unauthorized opening of link box.
  • a pressure sensor (212) was used to detect any increase of internal pressure of link box due to internal arc. All output data of these sensors are directly sent to main processing unit (MPU) (215) of intelligent link box (100).
  • MPU main processing unit
  • An analog conditioning board (213) was used to convert received signals from AC HV voltage divider (207) and AC current measuring sensors (208) to readable data for main processing unit (MPU) (215).
  • the conditioning board also contains a synch voltage selection circuit to provide appropriate synch signal for partial discharge measuring board (214).
  • the partial discharge measuring board (214) has three input channels connected to the insulator type partial discharge sensors (207). An input protection stage is followed by signal conditioning, filtering, and amplification of the high frequency partial discharge signals from partial discharge sensors (207). It also receives the synch signal from the conditioning board (213) to synchronize the measured PD signals with AC voltage of bonding system.
  • the board includes an ethernet output port to communicate with main processing unit (MPU) (215). Special attention has been made to develop a noise discrimination algorithm to reduce the false alarming due to received background noise.
  • MPU main processing unit
  • Ni-MH battery pack (216) charging from solar panel or street lighting line has been selected.
  • a microprocessor based MPPT charger was used to ensure long life (10 years) operation of battery pack.
  • An ARM Cortex M type (microcontroller) main processing unit (215) (which is low-cost and energy-efficient) has been selected to process all incoming data from sensors (207-212), analog conditioning board (213) and partial discharge measuring board (214).
  • An advanced decision-making algorithm for alarming has been embedded in this unit.
  • Alarming algorithms and triggering levels can be customized in SCADA user interface according to project specifications.
  • Two remote data communication methods (Fiber optic or GSM/GPRS) can be used according to project requirements.
  • All sensitive electronic components have been placed in upper separate compartment in lid of enclosure body (201) to be isolated (shielded) from HV side of link box (lower compartment). All electronic components are mounted on a removable baseplate in upper compartment. All sensor output cables are entering a junction box (217) on wall of lower compartment. All signal lines are protected by surge protection devices inside junction box. Connection between upper compartment (electronic devices) and junction box made via a multiple core signal cable (218) as well as a fiber optic cable (219). This fiber optic cable (219) is output of fiber optic media convertor (220) which converts standard data to optical data to be transmitted to SCADA control center. By removing these cables, the lid of link box (as well as all electronic devices) can be pulled out for any setting or maintenance work on site.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photovoltaic Devices (AREA)
  • Testing Relating To Insulation (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

Boîte de connexions intelligente munie d'un système d'avertissement précoce destiné à la surveillance en ligne d'un système de raccordement de gaines et d'accessoires de câble haute tension. Une boîte de connexions intelligente (100) munie d'un système d'avertissement précoce destiné à la surveillance en ligne d'un système de raccordement de gaines et d'accessoires de câble haute tension est caractérisée en ce qu'elle comprend : au moins un transformateur de courant (208) permettant de mesurer les courants CA induits dans un système de raccordement, au moins un capteur de détection d'eau (209) permettant de détecter une entrée d'eau dans la boîte de connexions intelligente (100), au moins un capteur d'humidité sensible à la température (210) permettant d'évaluer des problèmes de condensation ou d'autres conditions anormales à l'intérieur de la boîte de connexions intelligente (100), au moins un commutateur mécanique (211) permettant de montrer les états d'ouverture/fermeture d'un couvercle, au moins un capteur de pression (212) permettant de détecter toute augmentation de pression interne de la boîte de connexions due à un arc interne, une carte de conditionnement analogique (213) permettant de convertir des signaux reçus en provenance de capteurs de décharge partielle (207) et du transformateur de courant (208) en des données lisibles pour une unité de traitement principale (MPU) (215), une carte de mesure de décharge partielle (214) permettant de conditionner, de filtrer et d'amplifier les signaux de décharge partielle haute fréquence, une unité de traitement principale (215) permettant de traiter toutes les données entrantes provenant des capteurs, de la carte de conditionnement (213) et de la carte de mesure de décharge partielle (214), un bloc-batterie (216) permettant de fournir de l'énergie à tous les composants électroniques, une boîte de jonction (217) permettant d'unifier des câbles d'entrée et de protéger les signaux, un câble de signal de multicœur (218) pour la transmission de signaux entre des compartiments inférieur et supérieur, un câble à fibres optiques (219) pour la transmission de données par fibre optique, un convertisseur de support à fibre optique (220) permettant de convertir des données standard en données optiques à transmettre à un centre de commande, une boîte à bornes (221) permettant des mesures de décharge partielle locale.
PCT/TR2020/050920 2020-10-07 2020-10-07 Boîte de connexions intelligente munie d'un système d'avertissement précoce destiné à la surveillance en ligne d'un système de raccordement de gaines et d'accessoires de câble haute tension WO2022075928A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB2202088.7A GB2607143A (en) 2020-10-07 2020-10-07 Intelligent link box with early warning system for online monitoring of sheath bonding system and high voltage cable accessories
PCT/TR2020/050920 WO2022075928A1 (fr) 2020-10-07 2020-10-07 Boîte de connexions intelligente munie d'un système d'avertissement précoce destiné à la surveillance en ligne d'un système de raccordement de gaines et d'accessoires de câble haute tension

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/TR2020/050920 WO2022075928A1 (fr) 2020-10-07 2020-10-07 Boîte de connexions intelligente munie d'un système d'avertissement précoce destiné à la surveillance en ligne d'un système de raccordement de gaines et d'accessoires de câble haute tension

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WO2022075928A1 true WO2022075928A1 (fr) 2022-04-14

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PCT/TR2020/050920 WO2022075928A1 (fr) 2020-10-07 2020-10-07 Boîte de connexions intelligente munie d'un système d'avertissement précoce destiné à la surveillance en ligne d'un système de raccordement de gaines et d'accessoires de câble haute tension

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GB (1) GB2607143A (fr)
WO (1) WO2022075928A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115394020A (zh) * 2022-09-20 2022-11-25 华能辛店发电有限公司 一种基于局部放电特征信号分析的配电开关设备用预警装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101666686A (zh) * 2009-09-16 2010-03-10 武汉本杰明自动化设备工程有限公司 一种高压柜母线和电缆接头和触头的温度在线监测装置
WO2016190923A1 (fr) * 2015-05-27 2016-12-01 Xilinx, Inc. Récepteur à adc adaptable au canal
WO2019194754A1 (fr) * 2018-04-04 2019-10-10 Em Elektri̇k Malzemeleri̇ Yükleni̇m Sanayi̇ Ti̇caret Anoni̇m Şi̇rketi̇ Boîte de connexions comprenant un diviseur de tension de type isolant intégré et un capteur de décharge partielle inductif

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101666860A (zh) * 2008-09-05 2010-03-10 和硕联合科技股份有限公司 具有电量显示功能的电子装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101666686A (zh) * 2009-09-16 2010-03-10 武汉本杰明自动化设备工程有限公司 一种高压柜母线和电缆接头和触头的温度在线监测装置
WO2016190923A1 (fr) * 2015-05-27 2016-12-01 Xilinx, Inc. Récepteur à adc adaptable au canal
WO2019194754A1 (fr) * 2018-04-04 2019-10-10 Em Elektri̇k Malzemeleri̇ Yükleni̇m Sanayi̇ Ti̇caret Anoni̇m Şi̇rketi̇ Boîte de connexions comprenant un diviseur de tension de type isolant intégré et un capteur de décharge partielle inductif

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115394020A (zh) * 2022-09-20 2022-11-25 华能辛店发电有限公司 一种基于局部放电特征信号分析的配电开关设备用预警装置
CN115394020B (zh) * 2022-09-20 2024-04-02 华能辛店发电有限公司 一种基于局部放电特征信号分析的配电开关设备用预警装置

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GB202202088D0 (en) 2022-04-06
GB2607143A (en) 2022-11-30

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