Oct 2017 / by Melle Kruisdijk
Reform policy options and market mechanisms can incentivise investments in flexible generation for renewable integration, and the right combination of capabilities in a power system can create total system optimisation. Examining different electricity market structures in the EU (specific member states) and the USA (specific markets), while not an exhaustive description of all markets and mechanisms, provides context for some essential developments contributing to the increased focus on flexible generation investments and their value. This article is based on the award-winning paper “Market reform policy – case examples EU, USA and Australia: status and impact on investments” presented at the Power-Gen Europe 2016 conference.
Sep 2017 / by Weijun Wang, Haoyue Wang, Yong Sun and Wei Luo
While the wind energy resources of northern China are quite abundant, the abandoned wind rate keeps up at a high level due to the electric energy and heat coupling of the cogenerator during heating period. Consuming abandoned wind power heating facilitates degrading the abandoned wind power amount of northern China, developing consuming wind power ability and reducing the pollution. Whilst the economical efficiency of wind power heating is relatively poor due to the high construction costs, the pollutant discharge amount is low. The environmental costs are calculated, shifted into monetary costs, and then added with economic cost. The costs of consuming abandoned wind power heating include the decrement of the generation cost of wind power plant and the economic and environmental costs of thermal storage type electric heating. Taking the environmental conservation of wind power and the decrement of the generation cost of wind power plant into consideration, not only the comparison between consuming abandoned wind power heating and cogeneration heating is more comprehensive and reasonable, but also the joint programming of wind power heating and traditional modes of heating.
Keywords: Consuming abandoned wind power heating; thermal storage type electric heating; economic costs; environmental costs
Sep 2017 / by Dinesh Kumar and Shuchi Shukla
Power from the wind is extracted using the permanent magnet synchronous generator (PMSG) and induction generator (IG) and given to the loads in isolated areas i.e. in the off-grid regions. Power from both generators is collected as DC value after rectification process on common DC link. This collective DC voltage is then converted to AC via converter to run loads of different types in off-grid areas. The system is simulated in MATLAB to achieve the desired results.
Keywords: Wind turbine, PMSG, voltage stability, common DC link, induction generator, active-reactive power.
Sep 2017 / by Amartya Kumar Bhattacharya and D. M. P. Karthik
The Amu Darya, also called the Amu river and historically known by its Latin name, Oxus, is a major river in Central Asia. It is formed by the junction of the Vakhsh and Panj rivers, at Qal`eh-ye Panjeh in Afghanistan, and flows from there north-westwards into the southern remnants of the Aral Sea. In ancient times, the river was regarded as the boundary between Greater Iran and Turan. In classical antiquity, the river was known as the Oxus in Latin and Oxos in Greek – a clear derivative of Vakhsh, the name of the largest tributary of the river. In Sanskrit, the river is also referred to as Vakshu. The Avestan texts too refer to the river as Yakhsha/Vakhsha (and Yakhsha Arta (“upper Yakhsha”) referring to the Jaxartes/Syr Darya twin river to Amu Darya). The name Amu is said to have come from the medieval city of Amul, (later, Chahar Joy/Charjunow, and now known as Türkmenabat), in modern Turkmenistan, with Darya being the Persian word for “river”.