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In Europe, China and around the world many large wind farms have been installed and more have been planned. The wind farm installations must meet the Grid Code requirements for connections. Many difficulties have been encountered in meeting these requirements, especially for fault ride through, active power and frequency control, reactive power and voltage control requirements. This paper reviews...
This paper studies principles of developing dc transmission grids based on high power dc/dc converters. There has been much research on dc/dc converters and it is likely that some megawatt size units will achieve commercialisation stage soon. In this study, we assume that electronic dc transformers can achieve three functions: 1) voltage stepping, 2) voltage (or power) regulation, and 3) fault isolation...
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