A practical method for calculation of over-excited region in the synchronous generator capability curves

Moghadam, Davoud Esmaeil; Shiri, Abbas; Sadr, Sajad; Khaburi, Davood Arab

doi:10.1109/isie.2014.6864702

Cited by 8 publications

(3 citation statements)

References 3 publications

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“…In fact, protection systems based on capability curves safeguard the machine from being thermally overloaded or operated near static/dynamic stability limits. As shown in Figure 3, capability curves are usually given in the P-Q plane where the most important limitations are plotted-stator and rotor current limits, static and dynamic stability limits and thermal restrictions [38]. As SGs are the most valuable sources of reactive power in the power systems they are often operated in the overexcited region, thus having only a limited amount of reactive reserve capability.…”

Section: Synchronous Generatorsmentioning

confidence: 99%

Enhanced Contingency Analysis—A Power System Operator Tool

Bulat¹,

Franković

Vlahinić

2021

Energies

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Contingency analysis (CA) is a well-known function in power system planning and operation. In accordance with CA results, the system operator dispenses information regarding static security of the power system (overloads and/or voltage outside tolerable limits). However, classic CA with remedial action schemes cannot distinguish safe operating regimes from potentially dangerous ones in terms of voltage (in)stability. In fact, voltage instability is considered as one of the major threats leading to power system insecurity. Therefore, in this study an enhanced contingency analysis (ECA) is presented where the classical CA is extended with static voltage analysis based on the modal analysis. The article presents a dedicated methodology for the proposed ECA tool, with special emphasis on the analysis of corrective measures provided by the system operator, intended for enhancing power system security (regulation transformer action, distributed generation and energy storage). Also the influence of the load model was analyzed by simulation and the main conclusions are presented. The study demonstrated the advantages that distributed generation resources and energy storage can provide in the context of voltage stability. Also, the simulations acknowledged the importance of correct load modeling, since over or under estimation of a certain load-type component can result in too optimistic or too pessimistic power system operation limits.

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Section: Synchronous Generatorsmentioning

confidence: 99%

Enhanced Contingency Analysis—A Power System Operator Tool

Bulat¹,

Franković

Vlahinić

2021

Energies

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“…Estas máquinas rotativas tienen sus límites definidos por las curvas de potencia reactiva del generador proporcionada por los fabricantes. Estas curvas se trazan al representar los limitantes que tienen los generadores durante su operación [18]. La forma de modelar la curva de capacidad de los generadores sincrónicos se basa en el diagrama fasorial [19] del circuito equivalente (ver Figuras 2 y 3).…”

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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“…In the case of A generator, its PF should be lower than 94% of leading, and in case of B generator, PF should be lower than 92% of leading depending on generator capacity [9]. According to the operation control range of PF to regulate voltage rising at PCC (point of common coupling), the actual output power of each MHG could be limited depending on rated capacity [13,15]. A generator in Tab.…”

Section: Characteristics Of Voltage Control Of Distributed Generatorsmentioning

confidence: 99%

Voltage Control Method of Micro Hydropower Generators for Voltage Stabilization in Distribution Feeder with Renewable Energy Sources

2020

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This paper analyses the problem of voltage control by step voltage regulator (SVR) in the primary feeder with large-scaled PV systems, and presents operation ranges and the voltage control limit of micro hydropower generator (MHG) with power factor (PF) control function. In addition, this paper evaluates the voltage impact in primary feeders depending on voltage control modes of MHG, and then proposes an optimal voltage control algorithm. Furthermore, from the simulation results based on the proposed algorithm, it is verified that it can contribute to voltage stabilization in the distribution system with large-scaled PV systems.

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A practical method for calculation of over-excited region in the synchronous generator capability curves

Cited by 8 publications

References 3 publications

Enhanced Contingency Analysis—A Power System Operator Tool

Enhanced Contingency Analysis—A Power System Operator Tool

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

Voltage Control Method of Micro Hydropower Generators for Voltage Stabilization in Distribution Feeder with Renewable Energy Sources

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