Online Estimation of Power System Inertia Constant Under Normal Operating Conditions

The operation and the development of power system networks introduce new types of stability problems. The effect of the power generation and consumption on the frequency of the power system can be described as a demand/generation imbalance resulting from a sudden increase/decrease in the demand and/or generation. This paper investigates the impact of a loss of generation on the transient behaviour of the power grid frequency. A simplified power system model is proposed to examine the impact of change of the main generation system parameters (system inertia, governor droop setting, load damping constant, and the high-pressure steam turbine power fraction), on the primary frequency response in responding to the disturbance of a 1.32 GW generation loss on the UK power grid. Various rates of primary frequency responses are simulated via adjusting system parameters of the synchronous generators to enable the controlled generators providing a fast-reliable primary frequency response within 10 s after a loss of generation. It is concluded that a generation system inertia and a governor droop setting are the most dominant parameters that effect the system frequency response after a loss of generation. Therefore, for different levels of generation loss, the recovery rate will be dependent on the changes of the governor droop setting values. The proposed model offers a fundamental basis for a further investigation to be carried on how a power system will react during a secondary frequency response.

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Power System Inertia in High-Renewable Penetration Power Systems and the Emerging Role of Battery Energy Storage

2020 International Conference on Smart Grids and Energy Systems (SGES) ◽

10.1109/sges51519.2020.00031 ◽

2020 ◽

Author(s):

Nesimi Ertugrul ◽

Wai Kin Wong

Keyword(s):

Energy Storage ◽

Power Systems ◽

Power System ◽

Battery Energy Storage ◽

High Renewable Penetration ◽

Battery Energy ◽

System Inertia

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Structural assessment of the EU-DEMO WCLL Central Outboard Blanket segment under normal and off-normal operating conditions

Fusion Engineering and Design ◽

10.1016/j.fusengdes.2021.112350 ◽

2021 ◽

Vol 167 ◽

pp. 112350

Author(s):

Ilenia Catanzaro ◽

Pietro Arena ◽

Salvatore Basile ◽

Gaetano Bongiovì ◽

Pierluigi Chiovaro ◽

...

Keyword(s):

Operating Conditions ◽

Structural Assessment ◽

Normal Operating ◽

The Eu

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5G Poor and Rich Novel Control Scheme Based Load Frequency Regulation of a Two-Area System with 100% Renewables in Africa

Fractal and Fractional ◽

10.3390/fractalfract5010002 ◽

2020 ◽

Vol 5 (1) ◽

pp. 2

Author(s):

Hady H. Fayek

Keyword(s):

Power System ◽

Fractional Order ◽

Packet Loss ◽

Pid Controller ◽

Frequency Control ◽

Operating Conditions ◽

Load Frequency Control ◽

Load Frequency ◽

Control Scheme ◽

Non Linear

Remote farms in Africa are cultivated lands planned for 100% sustainable energy and organic agriculture in the future. This paper presents the load frequency control of a two-area power system feeding those farms. The power system is supplied by renewable technologies and storage facilities only which are photovoltaics, biogas, biodiesel, solar thermal, battery storage and flywheel storage systems. Each of those facilities has 150-kW capacity. This paper presents a model for each renewable energy technology and energy storage facility. The frequency is controlled by using a novel non-linear fractional order proportional integral derivative control scheme (NFOPID). The novel scheme is compared to a non-linear PID controller (NPID), fractional order PID controller (FOPID), and conventional PID. The effect of the different degradation factors related to the communication infrastructure, such as the time delay and packet loss, are modeled and simulated to assess the controlled system performance. A new cost function is presented in this research. The four controllers are tuned by novel poor and rich optimization (PRO) algorithm at different operating conditions. PRO controller design is compared to other state of the art techniques in this paper. The results show that the PRO design for a novel NFOPID controller has a promising future in load frequency control considering communication delays and packet loss. The simulation and optimization are applied on MATLAB/SIMULINK 2017a environment.

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A Simple Design Approach for Excitation Controller and Power System Stabilizer

ASME 2010 Dynamic Systems and Control Conference, Volume 2 ◽

10.1115/dscc2010-4064 ◽

2010 ◽

Author(s):

G. Fusco ◽

M. Russo

Keyword(s):

Power System ◽

Transient Stability ◽

Short Circuit ◽

Design Procedure ◽

Voltage Regulation ◽

Operating Conditions ◽

Power System Stabilizer ◽

Simple Design ◽

Wide Range ◽

System Stabilizer

This paper proposes a simple design procedure to solve the problem of controlling generator transient stability following large disturbances in power systems. A state-feedback excitation controller and power system stabilizer are designed to guarantee robustness against uncertainty in the system parameters. These controllers ensure satisfactory swing damping and quick decay of the voltage regulation error over a wide range of operating conditions. The controller performance is evaluated in a case study in which a three-phase short-circuit fault near the generator terminals in a four-bus power system is simulated.

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