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.
Most of the electrical power systems of large industrial plants, i.e. oil, gas, and petrochemical industries usually incorporate local generation as a measure to ensure continuity in the electrical supply to the critical processes of the plant. In some cases the amount of local generation may be enough to feed the complete demand of the industrial facility and in others, its amount may be just enough...
Today, a large number of wind generator interconnection requests have been queued and are being processed. The generator interconnection group study is a way to reduce the generator interconnection cycle time and increase interconnection certainty. However, it is very challenging to identify the “best” transmission upgrades for a large group of generator interconnections. It is also very important...
With the rapid progresses in the interconnection of national power systems in China, its scale grows fast, its dynamics becomes more and more complex, and the faults of the power grid could significantly damage the national economy. In event of electrical faults, some switches may be opened or closed to modify the configuration of the power systems and avoid the loss of synchronization among multiple...
Large-scale harvesting of solar energy is an important action to decelerate the observed climate changes and ensuring the availability of energy also in the future. It has been observed that the maximum-power-point (MPP) tracking converters have high contribution on the reliability problems in the photovoltaic energy systems because of misunderstanding of their real nature. The paper shows that most...
Selection of the DG interconnection protective relay is based on several criteria such as power system characteristics, the dynamic response of the generator, the system grounding, the DG transformer connection, etc., as well as the protection policy of the utility and coordination requirements. The interconnection protection IED design can be summarized as follows: Disconnection of DG plants when...
In this paper, we analysis the effects of tie-line impedance value on the damp of interconnected power systems from the viewpoint of damping characteristics. Based on the interconnection between Xin Jiang power grid and Northwest power grid, this paper is focused on the changes in damping characteristics before and after interconnection. The simulation after increase of tie-lines in accordance with...
Small signal stability that appears as low frequency oscillations play an important role when increasing power transfer in interconnected power systems. In this paper, a novel approach for generation rescheduling constrained to small signal stability based on neural network sensitivity analysis is presented. The proposed method considers system minimum eigenvalue as stability index for generation...
The complexity of power systems has increased in recent years due to the operation of existing transmission lines closer to their limits using flexible AC transmission system devices (FACTS), and also due to the increased penetration of new types of generators that have more intermittent characteristics and lower inertial response, such as wind generators. This changing nature of power systems has...
This paper reviews the impact of distributed generation (DG) penetration on power system stability. It discusses the dynamic impact of stand-alone or grid-connected DG or hybrid power systems on the transient and small signal stability of power systems. Modeling and simulation techniques and software required for such studies and applicability of intelligent techniques in assessing transient and small...
With the development of power grid interconnection, the low frequency oscillation is becoming more and more prominent which threats the stability of the system. It consists of local modes and inter-area modes, and the effectiveness of local PSS in damping inter-area modes is limited. Then the global power system stabilizer (GPSS) based on WAMS (Wide Area Measurement System) is proposed. First 3 problems...
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...
From October 2008 the interconnection between northeast and north power grid switched from alternating current to direct current. It is urgent to research the stability of northeast power grid based on the real network data. This paper studied the stability changing by applying real-time time-domain simulation method and frequency-domain analysis method. Research result indicated that the stability...
In some regional grids in China, wind power penetration will increase rapidly because of the abundant wind resources in those areas and the government policy impetus. As more and more attention is paid to the increase of wind-turbine farms, a number of problems should be investigated in more detail. Among these problems, the voltage stability of wind farms implemented with induction generators becomes...
This paper presents the impact of large scale PV generation on Bangladesh power system oscillatory and static voltage stability. First, the eigenvalue of the system without and with PV based generator has been analyzed. Then system loading margin is studied without and with PV based generator. The influence of radiation, position, and penetration of PV based generator on system is considered for the...
Power system islanding is the last defense in protecting power grids from wide-area blackout. This paper introduces a novel approach for separation of the entire power system into several stable islands. The proposed method combines both the dynamic and static characteristics of interconnected power network and determines the proper splitting schemes. The presented algorithm searches for proper islanding...
With the scenario of wind power constituting up to 20% of the electric grid capacity in the future, the need for systematic studies of the impact of wind power on both voltage and transient stability of the grid has increased. A large number of parameters will affect such studies. For this paper, studies were conducted on a standard three-machine, nine-bus system augmented by a radially connected...
To achieve improvement of reliability and seamless transition between interconnected mode and islanding mode, the splitting strategy of intentional islanding of distributed generation (DG) is studied. This paper proposes rooted tree to model DG island separation according to the radial structure and service restoration process of distribution system. The level and directed properties of rooted tree...
Modern technology has given rise to a slew of forward looking enhancements for systems that transmit and distribute electricity. Distribution networks must be carefully controlled in order to maintain an acceptable power supply quality. In the current climate change and environment, wind energy will not only be able to contribute to securing Australian energy independence and climate goals in the...
Podaj zakres dat dla filtrowania wyświetlonych wyników. Możesz podać datę początkową, końcową lub obie daty. Daty możesz wpisać ręcznie lub wybrać za pomocą kalendarza.