Nuclear Generating Stations and Transmission Grid Reliability

Kirby, Brendan; Kueck, J.D.; Leake, H.C.; Muhlheim, Michael David

doi:10.1109/naps.2007.4402323

Cited by 20 publications

(11 citation statements)

References 3 publications

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“…We assume that the specific heat of the U-shaped heat transfer tube, the specific heat, and the density of coolant are treated as constants. According to the mass, volume balance, and energy conservation law, a steam generator model with centralized parameters is established as shown in (7).…”

Section: Amentioning

confidence: 99%

“…This may have a large impact on grid voltage and frequency stability [1][2][3][4][5]. Analysis of blackout accidents has shown that the frequency characteristics and control ability of nuclear power units play an important 2 of 19 role in the development and subsequent treatment of power grid accidents [6,7]. However, a nuclear steam turbine has a large parameter range for the main steam pressure, low steam parameters, high proportion of power for the low-pressure cylinder, and is easy to overspeed [8].…”

Section: Introductionmentioning

confidence: 99%

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A Speed-Governing System Model with Over-Frequency Protection for Nuclear Power Generating Units

Wang

Sun²,

Zhao

et al. 2019

Energies

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Overspeed is more likely to occur in the process of load rejection or large disturbances for nuclear steam turbines due to the large parameter range and low steam parameters, as well as the power of the low-pressure cylinder accounting for a high proportion of the total power. It is of great significance to study the overspeed characteristics of nuclear power plants (NPPs) to ensure the safe and stable operation of the unit and power grid. According to the characteristics of NPPs, the overspeed protection model and the super-acceleration protection model were established, which were added to the speed-governing system model. The response characteristics of the reactor, thermal system, steam turbine and speed-governing system in the process of load rejection or large disturbances of the power grid were analyzed and simulated. The results were compared using the simulation software personal computer transient analyzer (PCTRAN). The simulation results showed that quickly closing both the high and medium pressure regulating valves could effectively realize frequency control when load rejection or a large grid disturbance occurred. The over-acceleration protection cooperates with the super-acceleration protection to avoid the repeated opening/closing of the valves due to overspeed protection. This could effectively reduce the impact of large disturbances on the reactor, thermal system, and turbine.

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Section: Amentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Speed-Governing System Model with Over-Frequency Protection for Nuclear Power Generating Units

Wang

Sun²,

Zhao

et al. 2019

Energies

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“…The time profile of the network voltage during the short circuit is characterized by a step drop from the steady-state value to zero at a time of 1 sec; the voltage stays at zero from 0.625 sec, and then starts to rise to its previous steady-state value with a ramp that lasts 2 sec. This profile represents the time behavior given by U.S. Federal Energy Regulatory Commission (FERC) and the Canadian Alberta Electric System Operator (AESO) for the LVRT [30]. Figures 11-13 show, respectively, the electric power, machine voltage, and machine speed in such a configuration.…”

Section: Variation Of the Connection Reactancementioning

confidence: 99%

A Feedback Linearization Scheme for the Control of Synchronous Generators

Bonfiglio

Delfino

Invernizzi

et al. 2012

Electric Power Components and Systems

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This paper proposes an advanced nonlinear control algorithm to manage active power and voltage provided by a synchronous generator. The algorithm is based on the so-called FeedBack Linearization (FBL) theory, which relies on the central concept to algebraically transform nonlinear systems dynamics into fully or partly linear ones, so that linear control techniques can be applied. Starting from the basic (electrical, magnetic and mechanical) machine equations, a suitable state transformation is introduced in order to apply the FBL block to the generator model. A regulation scheme is then derived, which receives as input the measure and the reference signals of both the electric power and the voltage at the generator side and produces as outputs the physical inputs of the machine, i.e. the mechanical torque and the field voltage. Particular attention is devoted both to the linearization process, where internal dynamics and stability studies play an important role, and to the design of the two (Power and Voltage) decoupled regulators. Several simulations are finally performed in order to verify the effectiveness of the proposed approach and to highlight its main advantages and drawbacks with respect to the traditional P-V synchronous generator control strategy

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“…This variation of output requires a complicated dynamic control system to improve the performance of the power grid that consist of or involve the renewable power system(s). When such a type of power system contributes the generating power with other conventional power plants, it is highly recommended to not affecting this variation with other power plants, for example in nuclear power plant, the generator does not have automatic governor control [9].…”

Section: The Renewable Power System Based Weather Forecast Informentioning

confidence: 99%

Weather Adaptive Renewable Energy Based Self Correctional Dynamic Power System for 2020 and Beyond

Aula

Lee

2011

2011 21st International Conference on Systems Engineering

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This paper presents a modified model of a power grid which consists of renewable power systems and other types of traditional power systems. The rising demand of the electricity makes the ordinary fossil sources may not be adequate to accommodate this growth and the expansion of the power grid. On the other hand, these types of sources may not be interested due to their environmental impacts and economical issues. Instead, renewable sources are dramatically gained more focus due to their characteristics for providing clean and economic power. Regardless to these characteristics, since the renewable power systems depend on the weather, they suffer from irregular, intermittence, and unpredictable power that they produce. However, with adapting accurate weather forecast data to the control system, the performance, efficiency and reliability of the renewable power system are potentially improved. The implementation of the advanced forecast technology in the power systems makes the ability to predict the amount of the available power on the grid both instantaneously and for the future real. This reality can be taken as a basis for designing and developing a comprehensive future power smart grid.

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Nuclear Generating Stations and Transmission Grid Reliability

Cited by 20 publications

References 3 publications

A Speed-Governing System Model with Over-Frequency Protection for Nuclear Power Generating Units

A Speed-Governing System Model with Over-Frequency Protection for Nuclear Power Generating Units

A Feedback Linearization Scheme for the Control of Synchronous Generators

Weather Adaptive Renewable Energy Based Self Correctional Dynamic Power System for 2020 and Beyond

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