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A new hysteretic control strategy with output capacitor equivalent series resistance (ESR) ripple compensation is presented. With such compensation, the effect of output capacitor ESR ripple voltage is enhanced. When step load change occurs, feedback of the output ripple adjusts the duty ratio promptly. In result, the proposed control scheme gains faster transient response speed and better steady...
This paper presents the damping torque analysis of an energy storage system (ESS) control in a multi-machine power system. The objective of the analysis is to examine the effect of the ESS control on the power system small-signal stability. Firstly in the paper, a systematic procedure to establish a linearized model of the multi-machine power system with the ESS installed is presented. Secondly the...
This paper presents a summary of the most important characteristics of wind turbine generators applied in modern wind power plants. Various wind turbine generator designs, based on classification by machine type and speed control capabilities, are discussed along with their operational characteristics, voltage, reactive power, or power factor control capabilities, voltage ride-through characteristics,...
Proper insulation coordination is critical to achieving expected life from wind plant equipment. The collector systems of large wind plants require the application of surge arresters to protect the equipment insulation from transient overvoltages. The application of surge arresters is constrained by maximum operating and temporary overvoltage levels. This paper provides a tutorial description of the...
This technical paper provides the basic guidelines for the application of reactive compensation systems to be used as part of a wind power plant. A brief history of wind plant reactive compensation system is discussed, then the fundamental needs of why reactive compensation is required. The paper will then provide some alternatives for reactive compensation, how to size the reactive compensation,...
Distributed energy resources (DE) with power electronics (PE) interfaces with the right control are capable of providing reactive power related ancillary services; voltage regulation in particular has drawn much attention. In this paper the problem of how to coordinate control multiple DEs to regulate the local voltage in the distribution system is addressed. A control method for voltage regulation...
Micro-generations (MGs) have gain increasing awareness among general public, who begin to recognize its potential to reduce their carbon emissions and electricity bills. Their willingness of uptaking local generation technologies is stimulated through capital grant schemes and new regulations imposed on new building stock. Further growth will require the support from both markets and tight and timely...
This paper presents a kind of AC electronic load for testing AC power source with energy recycling capability. The proposed structure is based on back to back single-phase PWM rectifiers of the voltage-source type. The operation principle of the model is described in detail to research the power matching problem and DC bus harmonic phenomenon. To achieve power balance and good performance, an independent...
A radial basis-function network (RBFN) is proposed for the intelligent control of a wind-turbine emulator and an induction-generator (IG) system with an AC/DC power converter. First, the indirect field-oriented mechanism is designed for the control of the IG system. Since the IG system is a nonlinear and time-varying dynamic system, an on-line trained RBFN is developed for the tracking controller...
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