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Frontiers of Electrical and Electronic Engineering

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Front Elect Electr Eng    2012, Vol. 7 Issue (4) : 416-426    https://doi.org/10.1007/s11460-012-0219-6
RESEARCH ARTICLE
Improving power system dynamic performance using attuned design of dual-input PSS and UPFC PSD controller
Yashar HASHEMI, Rasool KAZEMZADEH(), Mohammad Reza AZIZIAN, Ahmad SADEGHI YAZDANKHAH
Faculty of Electrical Engineering, Sahand University of Technology, Tabriz, Iran
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Abstract

The objective of this work is the coordinated design of controllers that can enhance damping of power system swings. With presence of flexible AC transmission system (FACTS) device as unified power flow controller (UPFC), three specific classes of the power system stabilizers (PSSs) have been investigated. The first one is a conventional power system stabilizer (CPSS); the second one is a dual-input power system stabilizer (dual-input PSS); and the third one is an accelerating power PSS model (PSS2B). Dual-input PSS and PSS2B are introduced to maintain the robustness of control performance in a wide range of swing frequency. Uncoordinated PSS and UPFC damping controller may cause unwanted interactions; therefore, the simultaneous coordinated tuning of the controller parameters is needed. The problem of coordinated design is formulated as an optimization problem, and particle swarm optimization (PSO) algorithm is employed to search for optimal parameters of controllers. Finally, in a system having a UPFC, comparative analysis of the results obtained from application of the dual-input PSS, PSS2B, and CPSS is presented. The eigenvalue analysis and the time-domain simulation results show that the dual-input PSS & UPFC and the PSS2B & UPFC coordination provide a better performance than the conventional single-input PSS & UPFC coordination. Also, the PSS2B & UPFC coordination has the best performance.
Keywords simultaneous coordinated design      unified power flow controller (UPFC)      power swing damping (PSD)      dual-input power system stabilizer     
Corresponding Author(s): KAZEMZADEH Rasool,Email:r.kazemzadeh@sut.ac.ir   
Issue Date: 05 December 2012
 Cite this article:   
Yashar HASHEMI,Rasool KAZEMZADEH,Mohammad Reza AZIZIAN, et al. Improving power system dynamic performance using attuned design of dual-input PSS and UPFC PSD controller[J]. Front Elect Electr Eng, 2012, 7(4): 416-426.
 URL:  
https://academic.hep.com.cn/fee/EN/10.1007/s11460-012-0219-6
https://academic.hep.com.cn/fee/EN/Y2012/V7/I4/416
Fig.1  A single machine connected to infinite bus with UPFC
Fig.1  A single machine connected to infinite bus with UPFC
Fig.1  A single machine connected to infinite bus with UPFC
Fig.1  A single machine connected to infinite bus with UPFC
Fig.1  A single machine connected to infinite bus with UPFC
Fig.2  Structure of UPFC-based damping controller
Fig.2  Structure of UPFC-based damping controller
Fig.2  Structure of UPFC-based damping controller
Fig.2  Structure of UPFC-based damping controller
Fig.2  Structure of UPFC-based damping controller
Fig.3  Dual-input PSS
Fig.3  Dual-input PSS
Fig.3  Dual-input PSS
Fig.3  Dual-input PSS
Fig.3  Dual-input PSS
Fig.4  PSS2B
Fig.4  PSS2B
Fig.4  PSS2B
Fig.4  PSS2B
Fig.4  PSS2B
Fig.5  Minimum singular value with all stabilizers at = -0.4 p.u.
Fig.5  Minimum singular value with all stabilizers at = -0.4 p.u.
Fig.5  Minimum singular value with all stabilizers at = -0.4 p.u.
Fig.5  Minimum singular value with all stabilizers at = -0.4 p.u.
Fig.5  Minimum singular value with all stabilizers at = -0.4 p.u.
Fig.6  Minimum singular value with all stabilizers at = 0.0 p.u.
Fig.6  Minimum singular value with all stabilizers at = 0.0 p.u.
Fig.6  Minimum singular value with all stabilizers at = 0.0 p.u.
Fig.6  Minimum singular value with all stabilizers at = 0.0 p.u.
Fig.6  Minimum singular value with all stabilizers at = 0.0 p.u.
Fig.7  Minimum singular value with all stabilizers at = 0.4 p.u.
Fig.7  Minimum singular value with all stabilizers at = 0.4 p.u.
Fig.7  Minimum singular value with all stabilizers at = 0.4 p.u.
Fig.7  Minimum singular value with all stabilizers at = 0.4 p.u.
Fig.7  Minimum singular value with all stabilizers at = 0.4 p.u.
Qe/p.u.Pe/p.u.loading
0.1670.8nominal
0.41.2heavy
0.010.2light
Tab.1  Loading conditions
Fig.8  Profiles of objective function
Fig.8  Profiles of objective function
Fig.8  Profiles of objective function
Fig.8  Profiles of objective function
Fig.8  Profiles of objective function
controller parameterscoordinated designcoordinated designcoordinated design
CPSSUPFCdual-input PSSUPFCPSS2BUPFC
ω input P input
G1007.14400.26900.1505–17.52122.00698.4627
T10.63240.27850.06460.81470.051.49400.4854
T21.00730.81830.050.90581.05680.15760.8003
T31.36390.54690.95750.12700.96490.97060.1419
T40.9751.09240.050.91340.90540.95720.4446
Tab.2  Optimal parameters and settings of the proposed controllers
nominalheavylight
eigenvaluedamping ratioeigenvaluedamping ratioeigenvaluedamping ratio
without PSS, dual-input PSS and UPFC0.0773±i6.56–0.179±i0.66–0.01180.26090.0775±i6.37–0.311±i0.82–0.01220.35460.0713±i6.5243–0.0109
CPSS & UPFC–2±i2.65–1.87±i2.13–1.77±i1.370.60190.65960.7922–2.74±i4.06–1.5±i0.84–1.18±i0.53–1.07±i0.360.55930.87150.91150.9477–1.99±i5.73–1.59±i1.10.32770.8223
dual-input PSS & UPFC–1.264±i5.25–6.6±i1.55–0.95±i0.110.92340.97360.9936–9.45±i6.54–3.15±i1.70–11.93±i3.41–0.95±i0.110.82210.88040.96140.9936–5.35±i5.62–4.63±i3.05–0.79±i0.490.68960.83550.8512
PSS2B & UPFC–12.64±5.25i–6.82±1.38i–0.95-0.11i–5.13±0.25i0.92350.98020.99380.9988–10.30±5.72i–7.77±3.05i–0.95±0.11i0.87410.93100.9937–2.98±2.98i–8.68±6.43i–12.85±4.51i0.70730.80360.9435
Tab.3  Eigenvalues and damping ratios of power system before and after the coordinated tuning with
Fig.9  Nonlinear simulation of test system
Fig.9  Nonlinear simulation of test system
Fig.9  Nonlinear simulation of test system
Fig.9  Nonlinear simulation of test system
Fig.9  Nonlinear simulation of test system
Fig.10  Dynamic responses for speed deviation at (a) nominal, (b) heavy, and (c) light loading conditions. Solid line: PSS2B & UPFC, dashed line: dual-input PSS & UPFC, dotted line: CPSS & UPFC
Fig.10  Dynamic responses for speed deviation at (a) nominal, (b) heavy, and (c) light loading conditions. Solid line: PSS2B & UPFC, dashed line: dual-input PSS & UPFC, dotted line: CPSS & UPFC
Fig.10  Dynamic responses for speed deviation at (a) nominal, (b) heavy, and (c) light loading conditions. Solid line: PSS2B & UPFC, dashed line: dual-input PSS & UPFC, dotted line: CPSS & UPFC
Fig.10  Dynamic responses for speed deviation at (a) nominal, (b) heavy, and (c) light loading conditions. Solid line: PSS2B & UPFC, dashed line: dual-input PSS & UPFC, dotted line: CPSS & UPFC
Fig.10  Dynamic responses for speed deviation at (a) nominal, (b) heavy, and (c) light loading conditions. Solid line: PSS2B & UPFC, dashed line: dual-input PSS & UPFC, dotted line: CPSS & UPFC
Fig.11  Dynamic responses for active power deviation at (a) nominal, (b) heavy, and (c) light loading conditions. Solid line: PSS2B & UPFC, dashed line: dual-input PSS & UPFC, dotted line: CPSS & UPFC
Fig.11  Dynamic responses for active power deviation at (a) nominal, (b) heavy, and (c) light loading conditions. Solid line: PSS2B & UPFC, dashed line: dual-input PSS & UPFC, dotted line: CPSS & UPFC
Fig.11  Dynamic responses for active power deviation at (a) nominal, (b) heavy, and (c) light loading conditions. Solid line: PSS2B & UPFC, dashed line: dual-input PSS & UPFC, dotted line: CPSS & UPFC
Fig.11  Dynamic responses for active power deviation at (a) nominal, (b) heavy, and (c) light loading conditions. Solid line: PSS2B & UPFC, dashed line: dual-input PSS & UPFC, dotted line: CPSS & UPFC
Fig.11  Dynamic responses for active power deviation at (a) nominal, (b) heavy, and (c) light loading conditions. Solid line: PSS2B & UPFC, dashed line: dual-input PSS & UPFC, dotted line: CPSS & UPFC
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