Practical measurements of partial discharges in a smart grid laboratory

Abstract

On-line measurement and monitoring of partial discharges in an MV cable system, including terminations and joints, is a challenging subject because it interacts with other components of the distribution network such as ring main units. The stochastic nature of partial discharges, the different configurations of the network, the external noise and the lack of standard recommendations have consequentially made the quantification of this phenomena more difficult. This paper is an attempt to investigate the behaviour of a theoretical pulse propagation and a real partial discharge in different circuits with almost the same configuration, that can be easily configured in a real Smart Grid laboratory. Several experiments and measurements were performed in order to compare these circuits and to find a factor that represents the influence of different circuit components to use as a reference or calibration to ensure the validity of further measurements.

Exploring the Decomposition Products of 1,3,3,3-Tetrafluoropropene and Perfluoro-(3-methylbutan-2-one) Gas Mixtures in Medium-Voltage Electrical Switchgear as Alternatives to SF6

“…For this purpose, the Ormazabal Corporate Technology’s experimentation network called UDEX (Demonstration and Experimentation Unit) has been used. 16 , 17 This network is a highly configurable medium-voltage network independent from the grid, which allows the development and testing of new technologies, products, and services in a safe and controlled environment.…”

“…A permanent 30 kV AC voltage was applied to the four prototype MV switchgear cubicles to check the stability of these four gas mixtures under operating conditions in the electrical switchgear. For this purpose, the Ormazabal Corporate Technology’s experimentation network called UDEX (Demonstration and Experimentation Unit) has been used. , This network is a highly configurable medium-voltage network independent from the grid, which allows the development and testing of new technologies, products, and services in a safe and controlled environment.…”

“…For this purpose, the Ormazabal Corporate Technology's experimentation network called UDEX (Demonstration and Experimentation Unit) has been used. 16,17 This network is a highly configurable medium- Both developed analytical methods were used for the quantification of C5K and HFO and for the detection, identification and, in some cases, quantification of decomposition products generated in the gas mixtures in the cubicles In Figure 3, chromatograms of the gas samples of the identified compounds are shown. The initial compositions of HFO and C5K in gas mixtures used in the four mediumvoltage cubicles and identified decomposition products are indicated in Table 5.…”