The distribution network fault location system is a simple and practical distribution automation solution. The system consists of the main website backend, collection orders.It consists of units,aggregation units and necessary public communication networks. It is suitable for online monitoring of 3-35kV overhead lines. It has the functions of line fault collection and active reporting of fault information to the main station. It is simple to use, stable in operation, easy to maintain, and high in reliability. , good openness and high cost performance.The transient wave recording type fault indicator consists of a collection unit and a collection unit. The collection unit has fault recording and micro-power wireless networking functions. It can upload fault information to the collection unit through the local wireless network. The collection unit then reports the fault information to the master station positioning system in real time, and the master station processes and completes graphical positioning.
Technical Parameter
1) Functions and characteristics of the collection unit
As the front-end data collection core equipment of the fault location system, the acquisition unit relies on high-performance low current self-power technology, high-precision electronic current transformer and low-power micro-power wireless networking communication technology to complete real-time sampling of line current and electric field. and high-speed wave recording, and perform data interaction with the collection unit through micro-power wireless technology. Implement functions such as data upload, parameter distribution and time synchronization.
1.The energy harvesting module uses high magnetic permeability materials and is combined with low power consumption system design to ensure battery-free full-function operation at a primary current of 3 A.
2.Use electronic transformer to detect current and ground electric field, ±1A in the range of 0A to 200Aand ±1A in the range of 200A to 600A the accuracy can reach ±0.5%;
3.The energy-absorbing opening CT is made of anti-rust and anti-corrosion materials, supplemented byhigh-level cutting technology to ensure sufficient supply for the equipment in outdoor environments electrical energy;
4.The system power supply adopts a three-level power architecture with long CT power supply, super capacitor and disposable lithium battery to ensure the reliability of the equipment all day long operating .
5.Remote wireless management and debugging, maintenance-free operation.
2)Functions and characteristics of the collection unit
The aggregation unit is a communication bridge between the collection unit and the background master station, and is responsible for managing the uplink remote transmission channel and the downlink micro-power wireless networking communication channel. The device has a stable and reliable uplink and downlink channel management mechanism to ensure smooth communication channels. It has system self-test and self-recovery capabilities and data resumption function in extreme circumstances.
Technical features:
1.Supports time synchronization by the master station or Beidou or other synchronous clock devices,and at the same time uses local micro-power wireless to perform timekeeping with an accuracy of less than 30us for the managed three-phase acquisition unit to ensure the accuracy of zero-sequence current synthesis;
2.Supports remote program upgrade and maintenance;
3.Solar power and backup power supply ensure reliable operation of the equipment around the clock.
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