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Synchronous generators are interconnected into the regional power transmission network to improve reliability, enhance the security of supply, trade of electricity and share the available natural resources for energy fuel supply. The interconnected power system experiences disturbances due to load variations and faults and causes stress on the generators to control and remain in synchronism. The study...
The current power systems are facing an important transition due to the integration of non-synchronous generation through back-to-back Full Rated Converters' (FRC). Coherency behaviour under the presence of large inclusion of renewables requires special attention in order to understand the swing oscillations when the inertia is decreasing due to the decoupling. This paper presents the application...
Power generation and grid stability have become key issues in the last decade. The high penetration of large capacity wind generation into the electric power grid has led to serious concerns about their influence on the dynamic behavior of power systems. The Low-Voltage Ride-Through (LVRT) capability of wind turbines during grid faults is one of the core requirements to ensure stability in the power...
A nonlinear robust control strategy for governor of hydro-turbine generator sets is presented. Different from traditional nonlinear robust control, a high gain observer instead of coordinate transformation is used, so that the controller does not depend on precise model of the plant, and only need to measure the rotor speed. The family of controller parameters can be easily tuned with simple simulation...
This paper presents the dynamic behaviour of a large doubly-fed motor-generator during and after the fault. Such machines will be included in pumping-storage plants in Slovenia and they will become an important part of Slovenian electric-power system, so it is important to know the behaviour of these machines. During the fault—;where doubly-fed motor-generator operates as an asynchronous machine—the...
Increased penetration of wind generation into high voltage transmission systems necessitates development of grid integration standards. One of them is Fault Ride-Through (FRT) or Low Voltage Ride-Through (LVRT) guidelines. Development of the voltage envelope depends on the transmission network characteristics along with considerations like contingency and protective relay settings. This paper outlines...
In this paper, the transient stability and voltage regulation of multimachine power systems are simultaneously addressed in a multivariable and nonlinear framework. The design method is based on a new power system model. The main characteristic of this model is that interactions between generators and changes in operating conditions are represented by time-varying parameters. The controller consists...
During recent years, the size of individual wind turbines has grown closer to 10 MW, and the size of wind power plants has increased significantly to 300 MW or more. This growing size of wind power generation requires that careful evaluation of transient stability of the overall grid should be undertaken. This paper attempts to investigate the impact of wind power plant penetration on the transient...
Increasing numbers of wind turbines are connected to electrical power systems. Wind turbines are based on technologies different from the synchronous generator, such as the squirrel cage induction generator and high or low speed generators that are grid coupled through a power electronic converter. When connected in small amounts, the impact of distributed generation on power system transient stability...
This paper presents an artificial neural network (ANN) based approach to tune the parameters of the SVC reactive power controller over a wide range of typical load model parameters. The gains of PI (proportional integral) based reactive power controller are optimised for typical values of the load voltage characteristics by conventional techniques. Using the generated data, the method of multilayer...
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