Virtual synchronous generator (VSG) control is a promising approach for voltage source converters as an interface between new energy sources and the power grid. VSG grid-friendly scheme, which can imitate mechanical inertia of (SG) droop characteristics. Yet, characteristics imitation SG induces frequency variation grid-connected inverter along with characteristic curve, will deteriorate perfor...

This paper offers non-linear control for enhancing the transient stability in power systems containing a photovoltaic (PV) and doubly fed induction generator (DFIG) by energy function (TEF) method finite-time observers. At first, TEF is utilized to enhance system PV, DFIG, synchronous (SG) constructing hybrid Lyapunov function. Then, derivative terms are estimated with The main contribution of ...

The brushless doubly-fed wind power system based on conventional control strategies lacks ‘inertia’ and the ability to support grid, which leads decline of grid stability. Therefore, a strategy reluctance generator (BDFRG) virtual synchronous (VSG) is proposed solve problem in this paper. output characteristics BDFRG VSG are similar (SG), can frequency increase ‘inertia’. According mathematical...

Abstract In the generation, most widely used generator is synchronous (SG) but its cost of producing per kilo watt (kW) power higher than induction (IG). There are many advantages IG over SG like, has small size for kW output production it means that energy density SG, when operates in parallel runs without hunting problem. can recover with relatively simple control. an alternative source to co...

Traditional permanent magnet synchronous generator (PMSG)-based wind turbine (WT) normally utilises phase lock loop (PLL) for obtaining accurate angle of AC grid to make sure maximum power point tracking (MPPT). However, a weak system with low short circuit ratio (SCR) and high control bandwidth PLL might have impaired effects on the stability system. To overcome these, novel PMSG-based WT form...

An accurate average value model of synchronous machine-rectifier system considering the effect of stator resistance is derived in this paper. A proper voltage-behind-reactance synchronous machine model without any approximations is used for the generator that allows effective calculation of commutation displacement angle. All rectification modes of the rectifier are studied. A detailed switchin...

one of the main problems in wind energy conversion system (wecs) is how to achieve maxim­u­m output power in different wind speeds. maximum methods for maximum power point tracking in wind energy conversion syst­e­ms require the knowledge of system characteristics and mechanic sensors. so, using these methods practically will follow with high price and an abundant difficulties. in this paper, n...

With the development of the Internet, the World-WideWeb has become everyone’s invaluable information source. However, most of data on the Web is currently in the form of HTML pages, which is neither well-structured nor associated with schema. It is almost impossible to use such data efficiently. Web wrapper technology has been developed to transform unstructured /semi-structured data to semi-st...

In recent years, there has been a fast growth in wind energy conversion system (WECS). There are two general types of wind turbines in WECS: fixed speed wind turbines and varying speed wind turbines.Permanent magnet synchronous generator (PMSG) is one of the most attractive generators for the varying speed turbine WECS.In this paper, a fuzzy controller is proposed to control the current source ...

Abstract This paper presents stability enhancement of a test system that is connected with Wind Farm (WF) by using Power System Stabilizer (PSS) for Synchronous Generator (SG) and Oscillation Damper (POD) Static Var Compensator (SVC). also proposes coordination mechanism the controller to effectively damp out oscillations make power more stable considering uncertainties. The uncertainty conside...