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The future of the power grid lies in large scale integration of distributed generation devices with the utility system, at either a medium or low voltage level. These new distributed generation technologies can offer benefits and opportunities to manufacturers and utilities in need of supplementary energy sources. However, a large increase in the number of distributed generation interconnections may potentially cause a number of technical concerns relating to the operation of the system in question. Because existing distribution networks were not originally designed to include complex distributed power-electronic systems, detailed testing of existing and future protection and control devices is necessary. The growing use of photovoltaic devices, wind turbines and other complex power electronic systems is changing the nature of distribution systems. The performance and stresses on wind farm components will therefore depend on control and protection system reaction. In fact, this new generation of intelligent grids is becoming as complex as sophisticated high-voltage AC/DC transmission systems. This paper describes how the Monte Carlo simulation technique and parallel simulators can be used to evaluate worst-case stresses for different fault and operating conditions.

Evaluating Switching Overvoltage of a Wind Farm using Monte Carlo Technique and Fully Digital Parallel Simulators