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The Wide Area Control System (WACS) supports electrical utilities in making optimal usage of the transmission grid capacity and preventing the spreading of disturbances. By providing real-time information to facilitate mitigation controls on the power system, WACS gives early warning of power system disturbances that, if left unattended, could cascade into system wide blackouts. This paper describes...
Microturbine Units (MTU) are used widely as distributed generators for their proved advantages. This paper presents an interface system for the Microturbine Unit (MTU) based on back-to-back converter to operate in grid connected and islanding modes. Besides regulating the active power fed from the MTU, during the grid-connected mode, the proposed interface system regulates the Point of Common Coupling...
This paper addresses challenges part of the shift of paradigm taking place in the way we produce, transmit and use power related to what is known as smart grids. The aim of this paper is to explore present initiatives to establish smart grids as a sustainable and reliable power supply system. We argue that smart grids are not isolated to abstract conceptual models alone. We suggest that establishing...
The growth of power consumption of autonomous objects requires creation of new powerful and energy-efficient converters. This paper describes a new version of the autonomous power generation system alternating current and constant frequency with better energy-efficiency based on three-level converters. The results of computer simulation in the software package POWERSIM 9.0 are presented in the work...
In the context of 2012 SIEMENS cup national college student automation industry challenge match, a Yaw control system of wind generating set is designed in this paper. The designs of the software and hardware are described in detail. Based on the software provided by the match, the debugging of the self-starting control, yaw control are completed very well. The accurate alignment toward the wind of...
This paper considers scheme of the AC — AC converter and briefly describes its control system. In this paper also presents the results of mathematical modeling of the system.
A Uncertainty kinetic model of feed water value position to steam generator water level plant is built. The derived model can express uncertainty in quantitative manner, including parameter perturbation and unmodeled dynamic due to operation condition change of steam generator and feed water pump. Then a robust controller is designed using the derived model based on structured singular value synthesis...
In the recent years, along with the increasing integrations of renewable power generations into the distribution systems, some serious problems such as fluctuation, rise and imbalance, etc. may occur to the voltage of distribution system. This paper make an approach aiming at obtaining mitigation effects of both rise and imbalance in the voltage so as to improve the distribution voltage quality by...
The event-triggered H∞ control design is investigated for networked control systems with uncertainties and transmission delays. A novel event-triggering scheme is proposed, which has some advantages over traditional ones with a continuous detector. Considering the effect of the transmission delay, a delay system model for the analysis is firstly constructed. Then, based on the model and Lyapunov functional...
This paper focuses on the design of a intelligent throttle controller for a portable gasoline generator. Fuzzy control technique is imposed in the controller design. When the load is lighter, the control target is the frequency of the generator. With the load increasing, the control strategy is switched from frequency control to voltage control in an appropriate moment. The experiment shows the good...
The controller for Archimedes wave swing (AWS) based wave energy conversion (WEC) system is designed in this paper. Based on the model of the AWS based WEC system in the d-q frame of reference, the control strategy of the WEC system under the irregular wave is derived. The AWS based WEC is regulated to be in resonance with the wave by the stiffness control of the linear permanent magnet generator,...
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