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Hybrid flower pollination and pattern search algorithm optimized sliding mode controller for deregulated AGC system

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Abstract

A new evolutionary optimisation technique, namely hybrid flower pollination and pattern search (hFPA-PS) technique is developed to tune output feedback sliding mode controller (OFSMC)for a multi-sources interconnected deregulated automatic generation control (AGC) system. The developed algorithm is justified considering popular benchmark functions. The developed algorithm is applied first time for the AGC system, to tune parameters of different classical controllers. The supremacy of recommended approach is established by competing the dynamic system performances with FPA, fruit fly optimization (FOA) and particle swarm optimization (PSO) technique for different power scenario for different classical controllers. Dynamic response of the system with hFPA-PS optimized OFSMC is established to be better than the classical controllers. The dynamic response of the system is analysed in the presence of generation rate constraint (GRC), governor dead band (GDB) and time delay. Additionally, the supremacy of recommended approach is analysed with sensitivity analysis, under uncertainty of system parameters.

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Abbreviations

I:

Subscript ‘i’ referred to area-i (i = T, H, N)

LFC:

Load frequency control

FPA:

Flower pollination algorithm

PS:

Pattern search algorithm

GDB:

Governor dead band

GRC:

Generation rate constraint

ISE:

Integral absolute square error

I:

Integral

PI:

Proportional–integral

ID:

Integral–derivative

PID:

Proportional–integral–derivative

IDD:

Integral double derivative

PIDD:

Proportional integral double derivative

OFSMC:

Output feedback sliding mode controller

TGi :

Governor time constant

Tt :

Turbine time constant

KPs :

Power system gain

TPS :

Power system time constants

B1 & B2 :

Frequency bias constants

R1, R2& R3 :

Speed regulation constants

T12 :

Synchronizing time constant

ΔPD :

Load disturbance

Δfi :

Frequency deviations

ΔPtie :

Tie line power deviation

Kr :

Steam turbine reheat gain

Tr :

Reheater time constant

TW :

Starting time of water in penstock

TRS :

Hydro turbine speed governor reset time

TRH :

Hydro turbine speed governor transient droop time constant

TGH :

Hydro turbine speed governor main servo time constant

TRH1 :

Time constant of first LP turbine

TRH2 :

Time constant of second LP turbine

TT1 :

Time constant of nuclear turbine

KHI :

Gain of HP turbine

KR1 :

Gain of LP turbine

Ki :

Participation factor of each generating unit

KDC :

Gain of HVDC link

TDC :

Time constant of HVDC link

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Correspondence to Banaja Mohanty.

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Appendices

Appendix 1

B1= B2= 0.4312 p.u.MW/Hz; Prt= 2000 MW; PL = 1840 MW; R1= R2= R3= 2.4 Hz/p.u.; TSG= 0.08 s; TT= 0.3 s; KR= 0.3; TR= 10 s; KPS1= KPS2= 68.9566 Hz/p.u.MW; TPS1= TPS2= 11.49 s; T12= 0.545; a12= − 1; TW= 1 s; TRS= 5 s; TRH= 28.75 s; TGN= 0.2 s; KHI= 2; KR1= 0.3; TT1= 0.5 s; TRH1= 7 s; TRH2= 9 s;KT = 0. 543478; KH = 0.326084; KN = 0.130438;

Appendix 2

See Tables 7, 8.

Table 7 Sensitivity analysis
Table 8 Statistical analysis of performances comparison for hFPA-PS tuned SMC controller and FOA tuned PIDD controller

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Mohanty, B. Hybrid flower pollination and pattern search algorithm optimized sliding mode controller for deregulated AGC system. J Ambient Intell Human Comput 11, 763–776 (2020). https://doi.org/10.1007/s12652-019-01348-5

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