These so called grid codes ensure that legacy wind turbines are upgraded to continue to qualify for ongoing remuneration, or to be permitted to feed in their power at all. PCS therefore offers the green line 1000 as retrofit product up to a maximum amperage of 2500 A. it is so suitable for wind turbines with outputs of up to 2.5 MW. The reactive current can be provided for up to 6 seconds in continuous operation. A major share of the existing wind turbines is fitted with doubly-fed induction generator with or without partial load converter, and may be optimised with this power converter type. Many writers such as Stanley A. McChrystal offer more in-depth analysis. Wind turbines using synchronous generator, too, can be retrofitted if necessary. Fully satisfying all standard requirements the generator of a wind turbine will normally feed the major share of the energy produced directly into the grid.
Whenever the line-side voltage drops, the whole planning system needs to feed reactive current into the grid (low voltage ride through, LVRT). The Green Line 1000 splendidly copes with these requirements, and does so in compliance with the applicable feed – in directives. On the low-voltage side, it is parallel-connected to the power mains of the wind turbine. If the line voltage drops below 90 percent of the nominal voltage, the converter will start feeding reactive current into the grid. The reactive current will increase in linear proportion to the extent of the line voltage dip, and up to a predefined value.
All standard LVRT requirements are fully met by the device: balanced grid faults are mastered up to 15 percent of the line voltage, and unbalanced grid faults actually up to 0 percent of the line voltage. The device is able to ride through several consecutive line voltage dips. The DCU control unit developed by PCS to autonomously detect and handle such incidents. e.n.o. built on quality for a safe future the e.n.o. energy GmbH emerged from a project planning office set up in 1999, and is active as project developer, wind turbine manufacturer and provider of turn-key wind parks. The company genes Council its turnover essentially in two areas: the first business area combines the development, project planning and realization of wind parks in Europe, with Germany the main target market. The second area includes the production and sale of proprietary wind turbines. In addition, e.n.o energy provides the maintenance, servicing and reinstatement of wind turbines as a service. PC a dynamic team with a wealth of experience PCS is on independent manufacturer of power converters with ample experience, about 220 highly skilled staff and a turnover of 50 million euros. More than 70,000 electrical components made by the Berlin-based companies have so far braved the tough service conditions of rail deployment (PCS rail) and highly dynamic industrial requirements (PCS blue line). Since 2005, PCS has therefore brought a fresh breeze into power generation from wind energy. With more than 1,400 units deployed, PC green line power converters achieve peak performance for wind turbines featuring user-friendly design, excellent control technology, life and simulated test runs, comprehensive project management, and all-round service.