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LiaoningDanengElectricCo.,Ltd.(StockCode:832107)isaleadinghigh-techenterpriseintegratingR&D,design,production,salesandconstructionofelectricpowerInternetofthings. 

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ThecompanyhascompletequalitymanagementsystemcertificationandLiaoningProvincesafetytechnologypreventionfacilitiesdesignandconstructionqualification,constructionintelligentengineeringprofessionalcontractingqualification,fire-fightingfacilitiesengineeringprofessionalcontractingqualification,installation(repair)powerfacilitieslicenseandotherqualifications,andcanundertakeallkindsofrelatedprojects.Wecustomizecomprehensivesolutionstomeettheneedsofdifferentusers.

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ThecompanyhascompletequalitymanagementsystemcertificationandLiaoningProvincesafetytechnologypreventionfacilitiesdesignandconstructionqualification,constructionintelligentengineeringprofessionalcontractingqualification,fire-fightingfacilitiesengineeringprofessionalcontractingqualification,installation(repair)powerfacilitieslicenseandotherqualifications,andcanundertakeallkindsofrelatedprojects.Wecustomizecomprehensivesolutionstomeettheneedsofdifferentusers.

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Thecompanyfocusesonprovidingintelligentsubstationintegratedsystemsolutions,publicfacilities(utilitytunnel)intelligentsecurityearlywarningsystemsolutions,powerdatacloudplatformsolutionsandrelatedproducts

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ThecompanyprovidesaseriesofcompleteandadvancedpowerandpublicfacilitiescomprehensivesolutionsforvariousapplicationscenariosofStateGrid,ChinaSouthernPowerGrid,ShenyangMetro,ShenyangTaoxianAirportandotherenterprises

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Thecompanyhasbeenadheringtotheconceptof"R&Dinnovation,excellentquality,professionalservice",adheretotheresponsibilityofleadingthemarket,andconstantlyestablishthecoreadvantagesofthecompany'sproducts

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In this era of rapid development of science and technology, optical fiber sensing technology as a branch of high technology is also moving forward

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On line partial discharge monitoring system of high voltage cable

2020-03-26



    At present, the operation and maintenance means of power grid company only include line inspection, contact temperature measurement, etc., which can not timely diagnose the operation status of cable equipment, especially for heavy load, full load and old cable equipment, which has not taken effective monitoring and detection measures, and some cables put into operation in early stage are in long-term service with faults and prone to failure, which can not guarantee reliable power supply.


     Liaoning Danone uses high-frequency CT to extract signals from grounding wires and cross interconnection lines, and separates discharge pulse signals from external noise interference by means of filtering, signal feature extraction, spectrum analysis, etc., and identifies discharge types, so as to find potential defects in cables.。


System topology


Advantages of the system:


Technical features:
1、 Real time online monitoring, real-time monitoring of partial discharge under the condition of high-voltage cable without power failure
2、Synchronous digital multi-channel partial discharge test technology can monitor multi-circuit and multi-phase cables at the same time
3、Carry out all-round monitoring of cable partial discharge, including cable body, cable intermediate joint and terminal head,
4、And it can accurately locate the discharge power
5、Equipped with optical fiber communication port, long transmission distance and convenient expansion
6、Accurate positioning of local discharge power supply, with positioning accuracy of ± 3M
7、Analysis of historical data and evaluation of development trend of CAAC


performance index

1、Power supply working voltage       AC90~240V,50~60HZ

2、Detection range           1~100MHZ

3、Dynamic range           -75dBm~0dBm

4、Number of channels 4, channels

5、Channel consistency         ＜0.5dBm    

6、EMC iec61000-4 (GB / t17626-4 highest level)

7、Dynamic test           IEC68

8、Input channel simultaneous detection

Synchronous signal 3 channels (phase a, phase B, phase C) can select external and internal simultaneous

Simultaneous measurement multi-channel simultaneous measurement

Communication mode network port and optical port serial communication mode using optical fiber

Output discharge size, discharge phase, discharge type, discharge times, etc




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