Application of solid-state phase shifter to stabilization of system frequency in an interconnected power system

2000 ◽  
Vol 132 (3) ◽  
pp. 19-29 ◽  
Author(s):  
Issarachai Ngamroo ◽  
Yasunori Mitani ◽  
Kiichiro Tsuji
Keyword(s):  
Solid State ◽  
Power System ◽  
Phase Shifter ◽  
Interconnected Power System ◽  
System Frequency

AGC System after Deregulation Considering TCPS in Series with the Tie-Line

2015 ◽  
Vol 16 (3) ◽  
pp. 281-295 ◽  
Author(s):  
Rajesh Joseph Abraham ◽  
D. Das ◽  
A. Patra
Keyword(s):  
Power System ◽  
Phase Shifter ◽  
Automatic Generation ◽  
Ancillary Service ◽  
System Effect ◽  
Interconnected Power System ◽  
Power Oscillations ◽  
In Series ◽  
System Frequency ◽  
Tie Line

Abstract This paper presents the study of automatic generation control (AGC) of two area interconnected power system after deregulation, considering a thyristor controlled phase shifter (TCPS) in series with the tie-line. It is possible to minimize the system frequency and tie-power oscillations by controlling the phase angle of TCPS which is expected to provide a new ancillary service for the future power system. Effect of TCPS is examined for three different cases, i.e. (1) unilateral contract, (2) bilateral contract and (3) contract violation. Analysis reveals that a TCPS is quite capable of suppressing the frequency and tie-power oscillations effectively as compared to that obtained without TCPS.

scholarly journals Hybrid Fuzzy Load Frequency Controller for a Two Area Interconnected Power System

2012 ◽  
pp. 278-282
Author(s):  
U. Prasad ◽  
P.K. Mohanty ◽  
P.K. Chattopadhyaya ◽  
C.K. Panigrahi
Keyword(s):  
Power System ◽  
Fuzzy Logic Controller ◽  
Fuzzy Controller ◽  
Control Strategies ◽  
Automatic Generation ◽  
Dynamic Responses ◽  
System Stability ◽  
Interconnected Power System ◽  
Stability Issues ◽  
System Frequency

This work addresses the special requirements of Automatic Generation Control in Modern interconnected Power system. In order to track the system frequency and handling the power system stability issues many control strategies has been suggested by the researchers .A new Hybrid fuzzy approach is introduced here .Fuzzy Logic controller with Mamdani interface having five member ship functions is tested with the Thermal Thermal and hydro thermal system Further hybrid Fuzzy controller is also tested with the same system and results are compared for the both The system Which is having Hybrid Fuzzy concept and thereby the response of frequency and tie line power can be improved substantially following a load change in any area. Further dynamic responses for small perturbation have been observed, considering HFLC and integral controller and the results of both have been compared.

scholarly journals Automatic generation control of multi source interconnected power system using adaptive neuro-fuzzy inference system

2020 ◽  
Vol 12 (3) ◽  
pp. 66-80
Author(s):  
Deepesh Sharma
Keyword(s):  
Power System ◽  
Pid Controller ◽  
Fuzzy Inference ◽  
Frequency Control ◽  
Automatic Generation ◽  
Load Frequency Control ◽  
Inference System ◽  
Interconnected Power System ◽  
Small Peak ◽  
System Frequency

LFC (Load Frequency Control) difficulty is created by load of power system variations. Extreme acceptable frequency distinction is ±0.5 Hz which is  extremely intolerable. Here, LFC is observed by PID controller (PID-C), Fuzzy and ANFIS controller (ANFIS-C). To control different errors like frequency and area control error (ACE) in spite of occurrences of load disturbance and uncertainties of system is checked by MATLAB/SIMULINK software. Proposed Controller offers less, and small peak undershoot, speedy response to make final steady state. LFC is mandatory for reliability of  large interconnected power system. LFC is used to regulate power output of generator within specified area to maintain system frequency and  power interchange. Here, two area multi source LFC system is analyzed. ANFIS is utilized for tie-line power deviation and controlling frequency. Proposed controller is compared with other controller and it is found that proposed controller is better than other controller. Proposed controller is better in terms of Robustness. The output responses of interconnected areas have been compared on basis of peak-undershoot, peak-overshoot and settling time (Ts). Result of FLC is compared to that of with classical controller such as proportional derivative plus integral (PID) controller  which suggests that conventional controller is slow. Keywords: LFC, Fuzzy, PID, ANFIS, LFC; FLC; ACE; PID-C, AGC.

scholarly journals DE Optimized LFC of Three Area Interconnected Power System with DFIG Wind System under Deregulated Environment

2019 ◽  
Vol 9 (2) ◽  
pp. 4963-4967
Keyword(s):  
Power System ◽  
Frequency Control ◽  
Load Frequency Control ◽  
Wind System ◽  
Interconnected Power System ◽  
De Algorithm ◽  
Differential Evaluation ◽  
Key Factor ◽  
Wind Input ◽  
System Frequency

Load frequency control (LFC) of an interconnected three-area power system with HVDC link under deregulated environment in presence of wind system is investigated. Integration of renewable sources in to exiting plants will affect the system frequency and hence design of a suitable controller is needed to maintain frequency within limits. Study of impact of wind penetration in to deregulated environment is a key factor. The secondary PID controller improves the overall system performance during sudden load disturbances and random variations of wind input. The optimal values of PID controllers in all three areas and pitch control in wind system are tuned by using Differential Evaluation (DE) algorithm

scholarly journals LFC of DFIG based Two Area System using TCPS, SSSC and SMES

2019 ◽  
Vol 9 (2) ◽  
pp. 1911-1916
Keyword(s):  
Power System ◽  
Phase Shifter ◽  
Magnetic Energy ◽  
Frequency Control ◽  
Load Frequency Control ◽  
Interconnected Power System ◽  
Flexible Ac Transmission ◽  
Load Frequency ◽  
Doubly Fed ◽  
Ac Transmission

The frequency and tie-line power in a system varies as the load changes. Therefore in order to damp the frequency, Load Frequency Control (LFC) is used. The function of the LFC is to minimizes the transient deviation and to make the steady state change in frequency, zero. This paper presents a Load frequency control (LFC) of Doubly Fed Induction Generator (DFIG) based two area system using Thyristor Controlled Phase Shifter (TCPS), Static Synchronous Series Compensator (SSSC) and Superconducting Magnetic Energy storage (SMES). Flexible AC Transmission Systems (FACTS) devices and SMES are used to damp out the frequency oscillations effectively in a power system. In order to maintain the system frequency at nominal value and the oscillations to settle down quickly a fast acting controller is desirable. In this paper a MATLAB based PID controller has been proposed in order to minimize the damping oscillation of the two-area interconnected power system. The results obtained with various combinations are presented and the results were encouraging.

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