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The full or partial rating frequency converters, in general, are used widely for the operation of variable speed wind turbine (VSWT) driven wind generators. Among the variable speed wind generators, permanent magnet synchronous generator (PMSG) which uses a full rating frequency converter for grid interfacing is drawing much attention nowadays due to its some salient features. However, considering...
Fixed speed wind turbine generator system (WTGS) uses induction generator as wind generator. Besides some of its advantages, it suffers greatly to meet the requirements of new wind farm grid code due to the dependency on reactive power. Some flexible AC transmission systems (FACTS) devices have been proposed recently for compensating the reactive power of induction generator during network disturbances...
This paper presents the integration of hydrogen generation scheme into wind farm interconnected high-voltage DC (HVDC) system. The offshore wind farm composed of variable speed wind turbines driving permanent magnet synchronous generators and HVDC transmission system based on three-level (3L) neutral point clamped (NPC) voltage source converter (VSC) for the interconnection between offshore wind farm...
Due to random variations of wind speed, the output power and terminal voltage of a fixed speed wind generator fluctuate continuously. These irregularities in power output are characteristic of intermittent energy sources such as wind energy, affecting both the power quality and planning of the energy storage system. It is reported that STATCOM/SMES (superconducting magnetic energy storage) topology...
This paper presents a system using an energy capacitor system (ECS) to smoothen the output power fluctuation of a variable-speed wind farm. The variable-speed wind turbine driving a permanent-magnet synchronous generator is considered to be connected to the ac network through a fully controlled frequency converter. The detailed modeling and control strategy of the frequency converter as well as variable-speed...
This paper proposes a system composed of a wind turbine generator system and superconducting magnetic energy storage (SMES) unit, in which SMES is controlled for smoothing the wind generator output power. A determination of power rating and storage energy capacity of SMES unit which are sufficient for the smoothing control but as small as possible is very important problem. In this paper, an evaluation...
As wind turbine output is proportional to the cubic of wind speed, the wind turbine generator output fluctuates due to wind speed variations. Hence, if the power capacity of wind power generators becomes large, wind power generator output can have an influence on the power system frequency. Some methods for smoothing the wind generator output fluctuations using several types of energy storage systems...
One of the foremost issues in the wind power generation is the output power fluctuation of wind generator due to the random variation of wind speed. Wind turbine generator systems (both fixed and variable speed types) more or less undergo within the power fluctuation dilemma. In addition, fixed speed wind generator suffers from terminal voltage fluctuation. This is because the fixed capacitor bank...
The recent development of power electronic technology encourages to use variable speed wind turbine (VSWT) driving a doubly fed induction generator (DFIG), wound field synchronous generator (WFSG) or permanent magnet synchronous generator (PMSG) for wind power generation. Among those, stability analysis of DFIG type of VSWT has already been reported in many literatures. On the other hand, stability...
This paper presents a model of a wind turbine-fed interior permanent magnet synchronous generator (IPMSG) connected to converter middot inverter drive system. Control inputs are defined as a torque of a wind turbine and the converter voltages and inverter voltages of the IPMSG drive. The drive system becomes a multi-input and multi-output controlled object. Variable control objects such as maximum...
This paper presents a combination system of wind energy conversion and hydrogen production. Hydrogen is expected as alternative energy sources in the future, and it is the best way to produce it from renewable energy like wind energy. On the other hand, the output of a wind generator, in general, fluctuates greatly due to wind speed variations, and thus the output fluctuations can have a..serious...
This paper proposes a robust controller for superconducting magnetic energy storage (SMES) unit to stabilize a grid connected wind generator system. In the proposed controller, both SMES active and reactive powers are controlled to decrease the fluctuations of output power and terminal voltage of the wind generator during abnormal conditions. In particular, the SMES controller is designed to enhance...
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