Serwis Infona wykorzystuje pliki cookies (ciasteczka). Są to wartości tekstowe, zapamiętywane przez przeglądarkę na urządzeniu użytkownika. Nasz serwis ma dostęp do tych wartości oraz wykorzystuje je do zapamiętania danych dotyczących użytkownika, takich jak np. ustawienia (typu widok ekranu, wybór języka interfejsu), zapamiętanie zalogowania. Korzystanie z serwisu Infona oznacza zgodę na zapis informacji i ich wykorzystanie dla celów korzytania z serwisu. Więcej informacji można znaleźć w Polityce prywatności oraz Regulaminie serwisu. Zamknięcie tego okienka potwierdza zapoznanie się z informacją o plikach cookies, akceptację polityki prywatności i regulaminu oraz sposobu wykorzystywania plików cookies w serwisie. Możesz zmienić ustawienia obsługi cookies w swojej przeglądarce.
Overhead transmission line icing is one of the main factors affecting safety and reliability of power grid, and the cascading failure may occur due to the iced transmission line. In this paper, a risk evaluation method is proposed to evaluate the cascading failure risk caused by the transmission line icing. Based on the ice accretion model of the transmission line, a piecewise linear model of the...
This paper presents the solutions provided by ABB Station Service Voltage Transformer (SSVT) to be an alternative power source in various kinds of substation applications. A SSVT is a hybrid type of instrument transformer which incorporates features of a high voltage inductive voltage transformer with that of a distribution transformer to offer a compact and reliable power source. Based on different...
A droop control-based approach of effective power sharing among four parallel inverter-interfaced generators in an islanded microgrid has been proposed in this paper. Droop control strategy is applied during load change in islanded microgrid system in a way that power sharing among all the generators is also equal. This paper describes the small-signal stability analysis method to select the control...
This paper proposes a method for sizing power capacity of the battery energy storage system (BESS) in order to improve power system reliability of a remote area with self-sustainable energy. Microgrid operation is designed to optimally utilize local generations by minimizing tie-line flow from the main grid. The formulated optimization problem can be conveniently solved using linear programming technique...
This paper presents the influence of burdens on the accuracy of current transformer (CT) at wide frequency range. Various types of burdens are used in this investigation. Analysis of the experiment results show that if the value of burden is fixed at 50 Hz in the calculation, the ratio error of CT is practically within the limits of IEC standard, only at 50 Hz. Unfortunately, the ratio errors increase...
When a power system is contaminated by power quality problems, a short transition will appear before power system restoring to a new stability state. The short transitions of various power disturbances correspond to different principal component characteristics. According to these characteristics, in this paper, a scheme based on transient behaviors using morphological max-lifting scheme (MMLS) and...
With the increasing deployment of smart grid technologies, modern electric power systems are becoming more and more dependent on their cyber infrastructure. The unavailability of communication networks inevitably influences the reliability of power systems. Therefore, it is very important to study the malfunctions of cyber networks and their impact on power system reliability. In this paper, to illustrate...
Electric Vehicles (EVs) have the potential to provide numerous ancillary services to the grid owing to the fact that they can act as either loads or sources when connected to the grid. However, customers are still disinclined to embrace this technology because of long battery charging time, limited range, and high battery replacement costs. Widespread rollout of fast Electric Vehicle Charging Stations...
The estimation of customer interruption costs is a challenging task. Understanding the true economic impacts of unwanted power interruptions is a must for planning purposes and for the decision making on electric energy policies. All methodologies that have been adopted to analyze the problem have strong and weak points. This paper presents the outage cost estimations for the small and medium scale...
The interaction between controllers of doubly-fed induction generators (DFIGs) and fixed series compensation would induce subsynchronous resonance (SSR) problem. To address this issue, this paper proposes a novel control scheme to defuse such an interaction just by adding notch filters (NF) to DFIG controllers. Two specific schemes are developed. One is to embed a NF into its d-axis channel in the...
This paper presents the use of the system identification method to find the appropriate transfer function of an interconnected power system with an energy storage system (ESS) and to design the robust ESS controller with the identified power system transfer function for robust stability improvement. The gradient search methodology is implemented to obtain an optimal power system transfer function...
In a coal-fired power generation system, energy efficiency is increasingly focused on due to the fact that the key indices of power plant such as coal cost and emission are closely related to energy efficiency. However, many coal-fired power plants lack effective energy efficiency program due to: diversified unit equipment type, insufficient or outdated original parameter setting, or diversified operation...
The harmonic elements of stator current in induction motors will change under the condition of stator inter-turn short circuit. According to this characteristic, in this paper, a novel technique based on discrete wavelet transform (DWT) is proposed for the identification of induction motor stator inter-turn short circuit. The power systems computer aided design (PSCAD) is employed to simulate the...
This paper presents an H» controller synthesised based on linear matrix inequalities (LMI) for a current source converter based superconducting magnetic energy systems (SMESs) connected to a node of power systems where the regulation of grid current has considered as a control objective. To facilitate the control design, the system is represented in terms of state space realization with uncertainties...
As modern wind farms have the ability to provide regulation service for the power system, wind power plant operators may be motivated to participate in the regulating market to maximize their profit. In this paper, an optimal regulation service strategy for a wind farm to participate in the regulating market is proposed. The relationship between up regulation price and wind power level, and the relationship...
Podaj zakres dat dla filtrowania wyświetlonych wyników. Możesz podać datę początkową, końcową lub obie daty. Daty możesz wpisać ręcznie lub wybrać za pomocą kalendarza.