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Many researches have focused on the stability analysis of power systems based on frequency response models. A constant gain value is often used to represent a governing system of a prime mover, which may be proper for a classic hydraulic governor but not suitable for modern digital electro-hydraulic (DEH) control systems. PID controllers, pressure or load feedbacks, frequency deviation feed-forwards...
As shown in many recent works, the load-frequency behavior can be represented by system frequency response models especially for an islanding process. In this paper, a frequency response model incorporating an under-frequency load-shedding scheme is presented for islanding power system simulations. The model was applied for a practical power system with both hydro and fossil-fired power generators...
Primary frequency control (PFC) is one of the most important means used in maintaining frequency stability of power systems. However, as a wide dead band is usually set in the governing system of generation units with digital electro-hydraulic (DEH) control system, the function of PFC in stabilizing system frequency during system emergencies is then decreased considerably. In order to study the characteristics...
Primary frequency control (PFC) has the ability to meet the fast load variation in a power system. Many researches have been done to improve the PFC ability only taking a whole system as the object, which can not give satisfaction to the security and stability of the multi-area power system as it becomes a developing trend in practice. Therefore, it is practically important to study the PFC ability...
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