Posts tagged as quality

Integrating renewable energy sources into smart grids – Part one

There is global momentum to diversify electricity generation sources for economic, environmental and security reasons. Distributed generation (DG) enables more companies to enter the electricity market stimulating competition, encourages the development of renewable energy (RE) and limits the impact of events such as cyber attacks. However, conventional electricity distribution networks are poorly matched to the […]

National aerial imagery quality improved

The Chief Directorate: National Geo-spatial Information (NGI), under the Department of Rural Development and Land Reform (DRDLR), has improved its digital imagery acquisition by changing its resolution from 0,5 m to 0,25 m ground sample distance (GSD). In 2005, NGI noticed a global trend towards digital image acquisition and decided to acquire its imagery using […]

Supraharmonics in transmission and distribution networks

Standards for harmonics in power networks (transmission and distribution) usually deal with the range below 2 kHz, as most of the harmonics due to waveform distortion fall into this range. Harmonics or disturbances in the range above 2 kHz are becoming noticeable in networks due to the introduction of inverter based distributed generators, and are […]