Abstract
Under the circumstance that the global energy security and environmental issues becoming increasingly critical, developing new energy sources has become an important demand for sustainable development of energy and economies in China and even the world. As an important renewable energy source, wind power has been developed and applied in many places around the world. Since the output characteristics of wind power are greatly different from the conventional generation unit, when a large number of conventional generators in the system are replaced by wind power, the system voltage and power angle stability characteristics will change, which may even destroy the stability of the whole system. Therefore, Determine the maximum generating capacity that replaced by wind power is significant for the security of the power system. Based on the mathematical model of power system stability, by utilizing network equations and the simplified wind power model, this paper obtained the maximum generating capacity that can be replaced by wind power under the precondition of satisfying the power angle and voltage stability. Finally, the WSCC 3-machine 9-bus system is used to simulate and testify the method with the DigSILENT PowerFactory software. The outcome shows that the model and conclusions in the report are verified.
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