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With the development of the smart meters, demand response (DR) is able to provide fast ancillary services, such as frequency control. Some recent studies demonstrated that DR can perform like thermal generators in the frequency control. However, little attention has been paid to DR's effect on the electromechanical oscillations of the power system. Fast-response DR can not only affect system frequency,...
This paper presents Cuckoo Search Optimization (CSO) algorithm for robust designing of Power System Stabilizer (PSS) of New England system to damp out low frequency oscillations. In this work; a conventional lead-lag speed-based PSS is used. An eigenvalue based optimization problem involving the damping factor and damping ratio is formulated for tuning of PSS parameters. The CSO based PSS (CSOPSS)...
Large-scale Doubly-fed induction generator-based wind power plants connected to series-compensated transmission system are facing the risk of sub-synchronous oscillations (SSOs). A regional grid recently suffered from a spate of SSO failures. This event seriously affected the safe and stable operation of the power grid. This particular case was analyzed in detail in this study. The characteristics...
Frequency droop algorithms used by CERTS Microgrid inverters adjust power by changing the output frequency. This concept assumes that the interconnecting impedance is primarily inductive, but it can be shown that the reactance-to-resistance (X/R) ratio significantly affects the dynamic response and the rate at which steady-state behavior is restored following transient events. The concept of active...
The impact of power-electronic devices in naval applications is growing steadily. In combination with the available low short-circuit power, the converters-here, pole-restraining controlled-have to guarantee power quality within these grids. Concerning reactive power, voltage levels and frequency control conventional power-plant control mechanisms can be adapted - which are not discussed here. Concerning...
This paper presents a mathematical formulation of a centralised controller for damping the unwanted oscillations in power systems. The proposed approach assumes a linearised model of the power system around an operating point and makes intensive use of the eigenstructure of the state matrix. The proposed algorithm accurately computes the unstable and poorly damped modes and determines the system components...
In this paper, a new static VAr system (SVS) control scheme for damping torsional modes due to subsynchronous resonance (SSR) in a series compensated power system has been developed. The proposed scheme, called as the Narendra Kumar-subsynchronous resonance (NK-SSR) damping scheme, utilizes the effectiveness of combined reactive power and frequency (CRPF) SVS auxiliary controller in coordination with...
This paper describes an integrated methodology for determining a decentralized control structure for LSS with corresponding low-order controllers. Structural decomposition is based on the use of the Generalized Hessenberg Representation (GHR). Controller design is accomplished by utilizing frequency weighting in the performance criterion, together with projective controls. The methodology is illustrated...
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