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This paper builds a reasonable and brief system model, which can be used for the power system stability simulation. This system model consists of the mathematical models of power units, their sub-control systems, the load and grid. Moreover, this paper established two Coordinated Control System (CCS) models with different logical configuration of the actual CCS and connected these CCS models to the...
The effect on system stability of load shedding has been a popular research topic for many years, especially in an islanded power system. But seldom studies gave full considerations to the actions of Primary Frequency Regulations (PFRs) and Overspeed Protection Control (OPC) systems of the generation units, which may have great impacts on the system responses against disturbances or emergency situations...
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...
Accuracy parameters of system model are of great importance in stability and security evaluation or simulation for power system. Some of the conventional methods may have inadequate adaptability or effectiveness for identification of different power systems. A new framework for power system identification is proposed based on an improved genetic algorithm with a logarithmic fitness function and an...
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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