Engineering Commons^™

Performance And Stability Assessment Of Future Grid Scenarios For The Australian Nem, Hesamoddin Marzooghi Mr., David J. Hill Prof., Gregor Verbic Dr.

Hesamoddin Marzooghi

Shifting towards higher penetration of diverse renewable energy sources (RESs) in power systems is motivated mainly by reducing carbon emissions. In the long term of several decades, which we refer to in terms of the future grid (FG), balancing between supply and demand will become more challenging. Also, displacing conventional generators with RESs, especially inverter-based and intermittent RESs, could have significant effects on performance and stability of FGs. So far, FG feasibility studies have mostly considered simple balancing, but largely neglected network related issues such as line overload and stability. The main contribution of this paper is to present a …

Development Of Stability Protection Framework In Oman Electricity Transmission System, Omar H. Abdalla, Thani Al-Khusaibi, Adil Al-Batashi, Anil Kumar, A. Svalovs, P. Watson, I. Svalovs

Omar H. Abdalla

The Effect Of Doubly Fed Induction Generator And Solid Oxide Fuel Cell On Transient Stability Of A Microgrid, Seyyed Hosein Jafari, Mahdi Raoofat, Haidar Samet, Hesamoddin Marzooghi Mr.

Hesamoddin Marzooghi

Emerging microgrids need more investigations on different technical aspects of using Distributed Generations (DGs). Because of the small scale of DGs and their moment of inertia, transient stability in microgrids is very important. This paper discusses the effect of Doubly Fed Induction Generator (DFIG) and Solid Oxide Fuel Cell (SOFC) power plants on transient stability of a microgrid. In order to get a more accurate response in transient operation, accurate DFIG and SOFC dynamic models are implemented. All power-electronics peripheral devices and their controllers are also modelled carefully. In the first step, simulation results show that the more penetration of …

Gbopcad: A Synthesis Tool For High-Performance Gain-Boosted Opamp Design, Jie Yuan, Nabil H. Farhat, Jan Van Der Spiegel

Jan Van der Spiegel

A systematic design methodology for high-performance gain-boosted opamps (GBOs) is presented. The methodology allows the optimization of the GBO in terms of ac response and settling performance and is incorporated into an automatic computer-aided design (CAD) tool, called GBOPCAD. Analytic equations and heuristics are first used by GBOPCAD to obtain a sizing solution close to the global optimum. Then, simulated annealings are used by GBOPCAD to find the global optimum. A sample opamp is designed by this tool in a 0.6-μm CMOS process. It achieves a dc gain of 80 dB, a unity-gain bandwidth of 836 MHz with 60o phase …

A Generalized Neuron Based Adaptive Power System Stabilizer, D. K. Chaturvedi, O. P. Malik, P. K. Kalra

D. K. Chaturvedi Dr.

Artificial neural networks (ANNs) can be used as intelligent controllers to control nonlinear, dynamic systems through learning, which can easily accommodate the nonlinearities and time dependencies. However, they require long training time and large numbers of neurons to deal with complexproblems. To overcome these drawbacks, a generalised neuron (GN) has been developed that requires much smaller training data and shorter training time. Taking benefit of these characteristics of the GN, a new generalised neuron-based adaptive power system stabiliser (GNPSS) is proposed. The GNPSS consists of a GN as an identifier, which tracks the dynamics of the plant, and a GN …