Operating limits of underexcited synchronous generator

Maljković, Zlatko; Gašparac, Ivan

doi:10.1109/powereng.2013.6635814

Cited by 6 publications

(3 citation statements)

References 4 publications

(2 reference statements)

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“…En el caso de la máxima corriente se relaciona con la corriente nominal del mencionado devanado. Al respecto de la mínima corriente tiene que ver con la operación en modo de consumo de potencia reactiva del generador [24]. Las ecuaciones que modelan el lugar geométrico de estos dos límites se indican a continuación ( )…”

Section: Generador Sincrónicosunclassified

Steady state stability in electrical power systems considering operation limits in generators, transformers and transmission lines

Guzmán¹,

Barrera-Singaña²

2021

ITECKNE

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Electrical power systems are exposed to several events that can cause unstable operation scenarios. This is due to improper operation of certain components. If an event occurs, the system must be designed to overcome that contingency, thus remaining in a permanent condition that must be evaluated in order to monitor and prevent a possible collapse of the system. An evaluation of steady state stability is proposed at this work based on the capacity curves of generators, transformers and transmission lines. These remarked curves provide information on the operation point of these elements, thus allowing the application of remedial actions. PowerFactory and Matlab are used to carry out the tool for monitoring the operation points after a contingency. The effectiveness of the developed tool is validated at the IEEE 39-bus power system model, where results shows that the functionalaty for different contingencies based on the operating conditions when the components of the power system are varied, cosnquently, the tool identifies cases that require actions at the operational level.

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Section: Generador Sincrónicosunclassified

Steady state stability in electrical power systems considering operation limits in generators, transformers and transmission lines

Guzmán¹,

Barrera-Singaña²

2021

ITECKNE

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“…Electric generators have an operational limit due to the overheating of the stator windings. The end winding of the generator experiences greater heating because the magnetic flux is not axial to the core segments [1][2][3][4]. Low ventilation in this region results in lowering the machine efficiency and further wearing of the bar's isolation materials leading to a generator shutdown.…”

Section: Introductionmentioning

confidence: 99%

Raman distributed temperature sensing for end winding of high‐power generator

Pelegrin

Bazzo

Dreyer

et al. 2020

IET Optoelectronics

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The temperature on the busbars of electric generators in the end-winding region needs to be monitored continuously. High temperature is associated with curvatures, seams, and poor ventilation. However, this solution has limitations, such as the number of measurement points. This article presents a reconstruction algorithm to estimate high-resolution signals, from readings of a distributed temperature system for monitoring high-power generator bars. The purpose of this work is to measure the temperature in the end-winding region with optical sensors based on Raman distributed temperature sensing (RDTS). The ability of RDTS equipment to perform a measurement is limited by its spatial resolution of 1 m. The proposed algorithm reduces spatial resolution through signal processing without changing the equipment hardware. Through the experimental results, it was possible to perform accurate temperature measurements for lengths up to 15 cm using the sensor element. With this method, the final winding of a generator bar of a 355 MW hydroelectric plant was instrumented in the laboratory. The results show that it is possible to monitor the temperature over this region, which has a length of 45 cm. Therefore, the proposed method has the potential for the use of RDTS systems for temperature acquisition of small, medium, and large electrical machines.

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“…Therefore, methodology for determination of actual power chart, together with underexcited operation limits, has been defined and tested in case of 247 MVA turbogenerator ( Fig. 1) [3], [4].…”

Section: Introductionmentioning

confidence: 99%

Large turbogenerator's synchronous reactance's load dependence determined by measurements

Maljković

Gašparac

Pavlica

2014

2014 International Conference on Electrical Machines (ICEM)

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The paper presents research on underexcited turbogenerator operation capability. Measurements of basic electrical values for various loads have been carried out in case of 247 MVA turbogenerator. Synchronous reactance for various loads has been determined from measurements. Its influence on underexcited operation limits has been evaluated.Index Terms-Turbogenerators, underexcited operation, end region, power system protection, power system measurements, power system stability Φ

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Operating limits of underexcited synchronous generator

Cited by 6 publications

References 4 publications

Steady state stability in electrical power systems considering operation limits in generators, transformers and transmission lines

Steady state stability in electrical power systems considering operation limits in generators, transformers and transmission lines

Raman distributed temperature sensing for end winding of high‐power generator

Large turbogenerator's synchronous reactance's load dependence determined by measurements

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