Diagnostic systems in multifunction cells
Programa: Retos Colaboración
Número de expediente: RTC-2017-6418-6
ORMAZABAL y CÍA (OyC)
CENTRO DE ESTUDIOS E INVESTIGACIONES TÉCNICAS (CEIT)
DIAGNÓSTICO DE AISLAMIENTO ELÉCTRICO (DIAEL)
ORMAZABAL PROTECTION & AUTOMATION (OP&A)
UNIVERSIDAD POLITÉCNICA DE MADRID (UPM)
The world of electrical grids is changing thanks to the lower cost of information technologies. A great deal of work is being carried out on aspects related to the safety, reliability and integrity of power cables in medium and high voltage electrical networks. These aspects can be effectively controlled by monitoring the state of insulation.
Continuous monitoring systems allow incipient defects in the main insulation of the equipment to be monitored and detected, which makes it possible to adopt the appropriate planned repair measures and avoid unexpected power outages due to sudden electrical insulation failures and the additional risk of explosion and fire.
Given the extent of distribution networks, any solution adopted must be intrinsically safe, reliable and economical. The economical requirement is related to the solutions provided being integrated so the installed and tested solutions can be supplied from the factory.
Within the scope of this project, the aim is to develop a medium voltage cell capable of integrating a compact solution for network protection, which includes:
A current interrupting element based on multifunction vacuum technology, that is, a vacuum bottle that includes not only the current interruption but also the isolating and grounding function.
The continuous monitoring of two key elements in the electrical network: (1) The medium and high voltage cables, and (2) the degree of vacuum itself in the vacuum bottle in order to ensure that the sectioning safety function is in all time reliable.
The protection relay that blocks the operation of the cell in case of loss of vacuum.
Ceit's role in the project
Within the consortium, Ceit’s primary task is to develop a diagnostic system (sensor & receiver) for the vacuum inside the multifunction vacuum bottle The sensor must be able to withstand the manufacturing conditions (temp ≈ 850 ◦C), “live” in a high magnetic field environment, have a wireless power supply and wirelessly transmit signals to the receiver. The receiver must be able to pick up the sensor’s signals despite the strong electromagnetic disturbances and strong electromagnetic fields in the environment. The result of this study will be greater knowledge about wireless vacuum measurement.