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The Witch (DVD): Anya Taylor-Joy, Ralph Ineson, Kate Dickie, Harvey Scrimshaw, Lucas Dawson, Ellie Grainger, Julian Richings,... The Witch (DVD)
Anya Taylor-Joy, Ralph Ineson, Kate Dickie, Harvey Scrimshaw, Lucas Dawson, …
R149 Discovery Miles 1 490 Ships in 9 - 15 working days

Horror thriller written and directed by Robert Eggers. The story follows a puritan family living on a farm in New England in 1630. When their baby son suddenly goes missing, the superstitious parents William (Ralph Ineson) and Katherine (Kate Dickie) begin to wrongly suspect their daughter Thomasin (Anya Taylor-Joy) is responsible and capable of witchcraft. When further sinister things start to happen, such as their crops failing, suspicion and fear begins to tear the family apart driving them to commit heinous acts. All the while, they become more vulnerable to the real culprit that lurks in the woods behind their home.

Dynamics and Control of VSC-based HVDC Systems (Paperback): Rodrigo Teixeira Pinto, Piergiovanni La Seta Dynamics and Control of VSC-based HVDC Systems (Paperback)
Rodrigo Teixeira Pinto, Piergiovanni La Seta
R1,742 Discovery Miles 17 420 Ships in 10 - 15 working days

Electricity transmission began with direct current. In 1880, Edison patented the first DC distribution system. That DC system was vital to broaden the use of his most famous invention, the electric lamp. However, at that time, low-voltage DC was proven inefficient. Despite the success of AC systems, the efforts for the development of practical high-voltage direct current transmission (HVDC) continued. The first HVDC transmission system was built in Sweden, in 1954, using mercury-arc valves. Nowadays, modern voltage-source converters (VSC) have smaller space requirements and improved reliability. VSC-HVDC has brought back the interest in the establishment of DC networks for applications such as DC supergrids and transnational networks for offshore wind farms. The goal of this work is to develop a more straightforward simulation model of VSC-HVDC systems; which can be inputted into simulation software packages and still provide realistic and reliable data on the system operation under all circumstances. The major contribution is the integration of the developed model, representing the whole DC transmission link, with the manifold control strategies possible for this new technology.

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