Showing 1 - 10 of 26
In this paper, a network power flux control of a variable speed wind generator is investigated. The wind generator system consists of a doubly fed induction generator (DFIG) connected to the network associated to a flywheel energy storage system (FESS). The dynamic behaviour of a wind generator,...
Persistent link: https://www.econbiz.de/10010806474
In this paper, a doubly fed variable speed wind induction generator connected to the grid associated to a flywheel energy storage system (FESS) is investigated. The dynamic behaviour of a wind generator, including the models of the wind turbine (aerodynamic), the doubly fed induction generator...
Persistent link: https://www.econbiz.de/10010804293
In this paper, a robust nonlinear controller for sensorless interior permanent magnet synchronous motors (IPMSM) is designed to track a desired reference which is computed by using a maximum-torque-per-ampere strategy (MTPA). The proposed controller ensures finite-time convergence of sliding...
Persistent link: https://www.econbiz.de/10010906721
This paper presents a wind-driven induction generator system with a hybrid controller, which combines the advantages of the integral–proportional and the sliding mode controllers. The proposed controller is designed to adjust the turbine speed to extract maximum power from the wind. The...
Persistent link: https://www.econbiz.de/10010808192
observers is used: a Kalman filter observer to estimate the rotor flux, and a MRAS observer for speed estimation. The stator … resistance estimator alleviates the usual performance degradation of MRAS-based drives at low speeds, caused by the thermal drift …
Persistent link: https://www.econbiz.de/10010749752
In order to safely and efficiently use the power as well as to extend the lifetime of the traction battery pack, accurate estimation of State of Charge (SoC) is very important and necessary. This paper presents an adaptive observer-based technique for estimating SoC of a lithium-ion battery pack...
Persistent link: https://www.econbiz.de/10010668056
While there is a large literature on the economic theory of international standards, and their presumed effects, we know much less about how international standards work in practice. This paper reviews the body of empirical work that has investigated the specific question: How international...
Persistent link: https://www.econbiz.de/10008568055
techniques. The method also increases the system's reliability by reducing the converter losses. Firstly, a MRAS (model reference …
Persistent link: https://www.econbiz.de/10011054293
Electricity generated from renewable wind sources is highly erratic due to the intermittent nature of wind. This uncertainty of wind power can lead to challenges regarding power system operation and dispatch. Energy storage system in conjunction with wind energy system can offset these effects,...
Persistent link: https://www.econbiz.de/10010810638
The aim of this paper is to propose a control strategy of a flywheel energy storage system associated with a diesel generator and a fixed speed wind generator. To control the power exchanged between the flywheel energy storage system and the ac grid, a fuzzy logic based supervisor is proposed...
Persistent link: https://www.econbiz.de/10010749320