NEQUAL - Web-based Voltage Quality Monitoring in Switzerland

23rd International Conference on Electricity Distribution

Location

Lyon, France

Links

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Abstract

Measurements of voltage quality (VQ) are an inherent part of the work of a distribution system operator (DSO). Particularly monitoring compliance according to the European standard EN 50160 [1] plays an important role. Furthermore an increasing number of DSOs install Power Quality (PQ) monitoring systems for internal PQ assessment purposes. A continuous increase of measurement sites and measurement data is expected in the future, which could be additionally pushed by the availability of other intelligent devices with PQ functions, like energy meters. Therefore the interest of DSOs in simple, comprehensive and uniform methods for VQ analysis and reporting grows continuously. In order to satisfy these needs and to meet the demand of the Swiss regulatory authority for transparent and countrywide VQ statistics, the development of the web-based application NeQual was initiated by a working group of the Association of Swiss network operators (VSE). After a brief discussion of the basic objectives for the NeQual development, the paper describes the basic functionalities of the application. The second part provides a short overview of the Voltage Quality in Swiss low voltage networks based on more than 700 individual measurements from the last seven years.