Applying static excitation systems

Wound-field synchronous machines (WFSMs) are included in the majority of large power generating units and special high-power motor drives, due to their high efficiency, flexible field excitation and intrinsic flux weakening capability. Moreover, they are employed in a wide range of high-end solutions in the low-to-medium power range. This contribution presents a comprehensive survey of classical and modern methods and technologies for excitation systems (ESs) of WFSMs. The work covers the fundamental theory, typical de-excitation methods and all the modern excitation equipment topologies in detail. It also includes a description of the state-of-the-art and the latest trends in the ESs of wound-field synchronous motors and generators. The purpose of the paper is to provide a useful and up-to-date reference for practitioners and researchers in the field.

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“…The potential source or bus-fed ES is the most popular choice in the power industry [66]. Topology A1 in Fig.…”

Section: ) Potential Source (A1)mentioning

confidence: 99%

Excitation System Technologies for Wound-Field Synchronous Machines: Survey of Solutions and Evolving Trends

et al. 2019

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“…To magnetise the air gap of the synchronous machine, its rotor (field) winding is excited with a dc source. This dc power is maintained here by static excitation system (SES) [13]. It is known that the power factor and harmonic components of the utility input line current can be improved by the poly-pulse AC/DC converter [14].…”

Section: Static Excitation Systemmentioning

confidence: 99%

Operational Benefits in Large Synchronous Machine with the Application of Static Drives

Datta¹,

Ansari²,

Mondal³

et al. 2014

ELELIJ

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In a power plant, synchronous machine work as an alternator after coupling with a prime mover (turbine). Machine discussed in this paper is a special alternator of 1500MVA rating used to supply power in a short circuit test laboratory. This alternator was initially driven by a prime mover. It is well known that a single synchronous machine can work at a time either as a motor or as a generator. With this concept, the prime mover of the said alternator was removed to make it in dual mode operation. This is achieved with the help of three static devices; they are static frequency converter (SFC), static excitation system (SES) and power electronic controllers. This paper begins with the detailed description of SFC and SES. Thereafter it looks into the starting techniques in pulse link mode and synchronous mode. Commutation methods for thyristors under different bridges are also listed out. It has also been explained about running this large machine as motor and converting it to generator for extracting power required for electrical tests. Various modes of operation (e.g. starting, running & stopping) and their inter changeability are also mentioned herewith. Savings in energy is the major outcome of the dual mode operation of this large machine. The energy saving techniques adopted on this machine is also part of this paper.

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“…When AVR senses the low alternator terminal voltage, the field current increases; while, in the case of increase in the terminal voltage, the field current decreases. Any disturbance in the terminal voltage will generate an error signal, which substantially modifies the firing gate pulses to the converter [3]. Another important purpose of AVR is to increase the transient stability of the alternator by driving excitation voltage to the ceiling under transient conditions.…”

Section: Introductionmentioning

confidence: 99%

Design and Implementation of IGBT based Static Excitation System with Buck Converter

Mishra

Gurrala

2018

2018 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES)

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This paper presents the development of a DC-DC buck converter based static excitation system for a microalternator. The IGBT based AC to DC converter is used as Front End Converter (FEC) followed by a buck converter to control the field voltage of micro-alternator. TMS320F28377S microcontroller is used for digital implementation of the Automatic Voltage Regulator (AVR). A proportional integral(PI) controller is used in the AVR. The proposed system is tested under various small and large disturbances like change in the reference voltage, 3phase fault at generator terminal, and sudden load rejection to study the performance of the proposed excitation system.

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Applying static excitation systems

Cited by 25 publications

References 2 publications

Excitation System Technologies for Wound-Field Synchronous Machines: Survey of Solutions and Evolving Trends

Excitation System Technologies for Wound-Field Synchronous Machines: Survey of Solutions and Evolving Trends

Operational Benefits in Large Synchronous Machine with the Application of Static Drives

Design and Implementation of IGBT based Static Excitation System with Buck Converter

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