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This paper proposes an adaptive hysteresis sliding mode control method for double-switch buck-boost converter. First a hysteresis sliding mode current controller is applied to the converter such that the converter has a limited switching frequency; and second, adaptive control is adopted in order to enable the converter to work at a fixed switching frequency. The change of the switching frequency...
An efficient adaptive stability control for multi-generators power system is presented based on step-ahead model prediction methodology. This control is named the model prediction adaptive control (MPAC) that is built upon optimization of selected performance index defined as weighted combination of generator voltage deviation, mechanical-electrical torque mismatch, and speed incremental. Method of...
Increasing additions of large-scale, non-traditional dispersed electricity generations such as those from wind farms on the traditional power systems have raised considerable concerns about the stability of power systems and adequacy of conventional stability controls. This paper presents an efficient adaptive stability control, based on step-ahead model prediction methodology, for a wide-area power...
Recently electricity generation from wind power has been increasingly popular worldwide. This paper proposes an adaptive protection and control strategy for interfacing the wind-powered distributed generators into the utility power distribution grids. The requirements for the interfacing are defined according to the IEEE-1547 standards. This paper presents the adaptive interfacing controls and protections...
Induction motors are the workhorse of our industries, continuously applied in new areas with improved performance utilizing modern power electronics and digital controls. This paper proposes a new computationally efficient real-time control for induction motor drives using state-of-the-art digital signal processing (DSP) technology, but without using a speed sensor. This control is named advanced...
Harmonic disturbances caused by power electronic converters for wind-power distributed generation (DG) that may have serious impacts on the power quality of its connecting power distribution systems must be well controlled according to IEEE 1547 Standards. This paper presents a novel adaptive harmonic detection active (AHDA) filter, consisting of an industry-type power electronic inverter controlled...
Connection of distributed generations (DGs) on the distribution systems starts to show benefits but may cause serious stability concerns. This paper presents an efficient adaptive stability control, based on step-ahead model prediction methodology, for distribution systems connected with DGs. This control named Model Prediction Adaptive Control (MPAC) is built upon optimization of selected performance...
Distributed generations (DGs) have been increasingly connected on the distribution systems, which cause stability concerns. This paper presents a novel adaptive generator control based on step-ahead model predictive methodology. This control, named model prediction adaptive control (MPAC), is built upon optimization of a specific performance index that is defined as a weighted combination of generator...
Recently electricity generation from wind power has been increasingly popular worldwide as one of the most promising renewable energy sources. This paper proposes an adaptive control strategy for interfacing distributed generations (DGs) from wind power to utility distribution grids. This paper presents the voltage control requirements and protection requirements for wind-powered DGs according to...
The stability of bulk power electricity systems has been well studied for decades. Conversely the stability study for newly deregulated distribution power systems with dispersed generations from small conventional or alternate energy sources has been virtually limited. Stability concerns, however, increase rapidly with today's growing demands for open access to power systems for electricity generation...
Harmonic disturbances caused by non-linear loads such as power switching devices often occur in the industrial and commercial power distribution systems and can damage sensitive equipment connected to the systems, causing tremendous productivity loss. This paper presents a novel adaptive-harmonic- detection active filter, consisting of an industry-type power electronic inverter controlled by state-of-the-art...
The stability of large-scale power systems has been well studied in the past three decades. However, the stability of power distribution systems in the presence of privately own generation virtually has not been studied. Power distribution system stability concerns increase rapidly as the demand for open access to the electric power systems for generation and trading under new government deregulation...
Harmonic disturbances caused by non-linear loads such as power switching devices often occur in the industrial and commercial power distribution systems and can damage sensitive equipment connected to the systems, causing tremendous productivity loss. This paper presents an adaptive-harmonic detection-algorithm (AHDA) active filter for effective elimination of harmonic disturbances. This filter consists...
As for the control of flexible space structure, in order to get both good dynamic characteristics and good static characteristics, the hybrid control scheme that this paper is put forward with variable structure control method and intelligent adaptive control method. The planar motion of a flexible structure is concerned with, which consists of a rigid central body and a flexible beam attached to...
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