Modeling of Thermal Generating Units for Automatic Generation Control Purposes

Egido, Ignacio; Fernandez-Bernal, F.; Rouco, L.; Porras, Eric; Saiz-Chicharro, A.

doi:10.1109/tcst.2003.821959

Cited by 52 publications

(24 citation statements)

References 12 publications

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“…The contribution of the thermal generation to the secondary load-frequency control R2 (p.u.) is modelled through the transfer function proposed in [28], Figure 6. Although modern wind and solar generators could contribute to the load-frequency regulation, this contribution entails a cost: some energy will be lost [18].…”

Section: Power Systemmentioning

confidence: 99%

On the Implementation of Variable Speed in Pump-Turbine Units Providing Primary and Secondary Load-Frequency Control in Generating Mode

2015

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This paper analyses different control strategies for the speed control loop of a variable-speed pump-turbine unit equipped with a doubly fed induction generator, operating in generating mode in an isolated power system with high penetration of intermittent renewable energy. The control strategies are evaluated and compared to each other in terms of the amount of water discharged through the pump-turbine and of the wicket gates fatigue while providing primary and secondary load-frequency control. The influence of the penstock length and the initial operating point on the performance of each control strategy is studied in detail. For these purposes, several simulations have been performed with a suitable dynamic model of the pumped-storage hydropower plant and the power system. The results of the paper indicate that a proper control strategy would consist in updating the reference speed according to the power generation schedule and keeping it constant within each scheduling period (typically 1 h).

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Section: Power Systemmentioning

confidence: 99%

On the Implementation of Variable Speed in Pump-Turbine Units Providing Primary and Secondary Load-Frequency Control in Generating Mode

2015

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“…By PI control approach zero steady state error in frequency of the system is achieved but it exhibits relatively poor dynamic performance which results in maximum overshoot and large settling time. Fuzzy logic is effectively used to change the integral gain of AGC settings automatically to restore nominal system frequency for various wide range load changes in papers [4][5][6]. The terminal voltage magnitude changes due to change in reactive power demand.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of Controllers For AGC And AVR in Two Area System

kumar¹,

Tanti²

2016

IJSRE

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Keywords: AGC, AVR, PID, IMC, FLC, FLC-IMC, MATLAB INTRODUCTIONAutomatic generation control is very important issue in power system operation and control for supplying sufficient and both good quality and reliable electric power. The purpose of AGC control is to reduce steady state frequency error of the system to zero [1]. The generator excitation system maintains generator voltage and hence, controls the reactive power flow in power system. The role of AVR is to maintain the terminal voltage magnitude of synchronous generator at a specified level [2]. By PI control approach zero steady state error in frequency of the system is achieved but it exhibits relatively poor dynamic performance which results in maximum overshoot and large settling time. Fuzzy logic is effectively used to change the integral gain of AGC settings automatically to restore nominal system frequency for various wide range load changes in papers [4][5][6]. The terminal voltage magnitude changes due to change in reactive power demand. The potential transformer (PT) senses the voltage magnitude on one phase and it is compared with DC set point signal. The amplifier error controls the exciter field and hence, the main field of the generator for getting a desired value of voltage [7]. This paper presents a development of voltage control of AVR or excitation system by using Fuzzy-IMC controller to overcome nonlinearities and uncertainties in the systems. Fuzzy-IMC is used to make the system internally stable and it gives better result than other implemented controllers [8]. Development of AGC for frequency stabilization using Fuzzy logic controller is also presented. FLC is an intelligent controller which uses IF and THEN rule to obtain optimized result. However FLC makes the system little sluggish [3].

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“…Several studies [2][3][4][5] on active power balancing in a power system with large-scale wind power integration have been performed over the years. In [2], the performance of the secondary control action and the regulating power control from conventional power plants is analyzed, while in [3] it is stated that response of the thermal power plants used in power balance control is mainly determined by their active power ramp rate.…”

Section: Introductionmentioning

confidence: 99%

“…In [2], the performance of the secondary control action and the regulating power control from conventional power plants is analyzed, while in [3] it is stated that response of the thermal power plants used in power balance control is mainly determined by their active power ramp rate. In [4], a Dutch case study is described to assess the automatic generation control (AGC) performance in the presence of large-scale wind power and it is concluded that additional reserves from thermal power plants are required for keeping the area control error at the same level.…”

Section: Introductionmentioning

confidence: 99%

Compensating active power imbalances in power system with large-scale wind power penetration

Basit

Hansen

Altin

et al. 2015

J. Mod. Power Syst. Clean Energy

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Large-scale wind power penetration can affect the supply continuity in the power system. This is a matter of high priority to investigate, as more regulating reserves and specified control strategies for generation control are required in the future power system with even more high wind power penetration. This paper evaluates the impact of large-scale wind power integration on future power systems. An active power balance control methodology is used for compensating the power imbalances between the demand and the generation in real time, caused by wind power forecast errors. The methodology for the balance power control of future power systems with large-scale wind power integration is described and exemplified considering the generation and power exchange capacities in 2020 for Danish power system.

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Modeling of Thermal Generating Units for Automatic Generation Control Purposes

Cited by 52 publications

References 12 publications

On the Implementation of Variable Speed in Pump-Turbine Units Providing Primary and Secondary Load-Frequency Control in Generating Mode

On the Implementation of Variable Speed in Pump-Turbine Units Providing Primary and Secondary Load-Frequency Control in Generating Mode

Performance Analysis of Controllers For AGC And AVR in Two Area System

Compensating active power imbalances in power system with large-scale wind power penetration

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