The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper presents an enhanced control scheme for an interior permanent magnet (IPM) synchronous generator based direct drive wind turbine, incorporating maximum torque per ampere trajectory (MTPA) and maximum power extraction (MPE) algorithm. The main advantage of incorporating MTPA trajectory in the control scheme is that it can generate the required torque with a minimum stator current to minimize...
This paper presents a novel control scheme of neutral point clamped (NPC) voltage source converter (VSC) based static synchronous compensator (STATCOM) to enhance the performance of wind farms. A novel control strategy for the STATCOM is presented by introducing a voltage equalizer for dc link capacitor voltages and decoupled current controllers to produce appropriate d-q currents. The controllers...
Effective interconnection of stochastically variable renewable energy resources like solar PV (photovoltaic) systems to the grid requires meticulous attention to ensure system compatibility, stability and reliability. The operating characteristics of such PV power plants need to become familiar to power systems engineers and operators. Such familiarity can effectively be achieved only via system modeling,...
This paper investigates control and operation strategy of grid connected permanent magnet synchronous generator (PMSG) based direct drive variable speed wind turbine with a static synchronous compensator (STATCOM). The application of STATCOM enhances the system performance by improving the fault ride through capability of the wind turbine. Control strategies for generator side converter with maximum...
For photovoltaic (PV) energy system integration to the power grid, knowledge of its operating characteristics is invaluable to power engineers. Such knowledge can effectively be achieved via system modeling, simulation and experimental studies. This paper develops models for an integrated PV power system which comprises PV array, SEPIC (single ended primary inductance converter) converter, bidirectional...
Maximum Power Point Tracking (MPPT) is an important consideration in Photovoltaic (PV) Systems, particularly as these systems increase in size and are exposed to non-uniform environmental conditions. Conventional MPPT techniques are designed to track the Maximum Power Point under uniform conditions where there is a single maximum power. Under non-uniform environmental conditions, with bypass diodes...
This paper presents control strategies for combined operation of fixed speed and direct drive variable speed wind turbines connected to the grid. The system consists of a direct drive permanent magnet synchronous generator (PMSG) and a directly connected self-excited induction generator (SEIG). The wind energy system together with its controllers is implemented in Matlab/SimPowerSystem. Since SEIGs...
In this paper, a grid connected permanent magnet synchronous generator (PMSG) based direct drive variable speed wind turbine with a static synchronous compensator (STATCOM) is investigated to achieve uninterrupted operation of wind farms during grid disturbances. The wind energy system will be able to maintain uninterrupted operation during grid faults or disturbances. The control strategies for the...
Understanding photovoltaic (PV) cell operation relies on accurate models being available that follow practical PV characteristics. Many models are proposed in the literature that vary in their complexity and range of application. This paper investigates the key issues involved in developing an accurate PV cell model that can demonstrate the effects of environmental factors. Operational constraints...
This paper presents the operation and control strategy for a direct drive variable speed permanent magnet synchronous generator to inject maximum power to the grid. A control strategy with maximum power extraction for the generator side dc to dc converter is proposed. The generator speed is regulated under fluctuating wind speed through this converter. A dc link voltage controller is used to regulate...
This paper proposes an overall power management control strategy of a stand-alone power supply system consisting of wind turbine and battery storage system. The overall control strategy consists of two layer structure. The upper layer is overall power management controller that generates the reference signal for the local controller. Based on reference signal, the local controllers control the wind...
This paper presents control and operation strategy of a grid connected hybrid wind-fuel cell and STATCOM based energy sources. A dynamic model for the hybrid system is developed using Matlab/Simpower. The hybrid system consists of a doubly fed induction generator (DFIG), direct drive permanent magnet synchronous generator (PMSG), directly connected self-excited induction generator (SCIG) and a solid...
The variability and intermittency associated with the production of electricity by photovoltaic (PV) systems pose unique challenges to power systems engineers. Overcoming these challenges requires the use of computer models that accurately simulate the behavior of such systems. There is a dearth of such reliable and accurate models for PV systems study. This paper develops models for an integrated...
Accurate models of photovoltaic (PV) cell characteristics are essential to enable the operation of PV cells to be understood and optimized for operation under variable environmental conditions. Various models have been proposed in the literature, which use diodes and resistors to represent PV cell characteristics. A key concern with these models is that individual parameters such as resistances, diode...
This paper investigates control and operation strategy of grid connected permanent magnet synchronous generator (PMSG) based direct drive variable speed wind turbine with a static synchronous compensator (STATCOM). The application of STATCOM enhances the system performance by improving the fault ride through capability of the wind turbine. Control strategies for generator side converter with maximum...
This paper presents a control strategy for a standalone power system comprising of a wind turbine and battery storage systems. The proposed control system consists of a back-to-back NPC converter controller and a bi-directional battery storage converter controller. The back-to-back three-level converter consisting of a machine-side converter and a load side inverter is used to fulfill several objectives...
Grid integration of variable wind power is confronted with many challenges. Challenges and issues associated with large scale wind integration into the existing power grid are discussed in this paper. Different wind turbine technologies and their technical features are presented. A review of the state of the art energy storage technologies, their characteristic features and comparison are presented...
This paper presents a novel control strategy for a direct drive interior permanent magnet (IPM) synchronous generator based variable speed wind turbine with controlled energy storage. The overall control system consists of a machine side converter controller, a bi-directional dc-dc converter controller for battery energy storage management and load side inverter controller for voltage and frequency...
The paper proposes a Fuzzy logic approach for controlling three-level NPC converters in stand alone wind energy systems. A key function of this controller is to maintain constant voltage and frequency for customers while maintaining smooth voltage waveform with less filtering requirements. The principle of the proposed Fuzzy controller is based on a modified PI approach in which the error and its...
This paper presents the dynamic operation and control strategies of a hybrid wind-diesel-battery energy storage based power supply system for isolated communities are investigated. Control strategies for voltage and frequency stabilization and efficient power flow among the hybrid system components are developed. The voltage and frequency of the hybrid wind-diesel system is controlled either by a...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.