Control Active and Reactive Power Flow with UPFC connected in Transmission Line

Komoni, Vjollca; Krasniqi, Isuf; Kabashi, Gazmend; Alidemaj, Avni

doi:10.1049/cp.2012.2015

Cited by 9 publications

(2 citation statements)

References 7 publications

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“…Power flow for Psh and Qsh comes from bus i. Iij is the current passing via UPFC series converters. The active and reactive power flows from the UPFC series exiting bus i are designated as Pij and Qij, respectively [30], [31]. The given equivalent circuit of UPFC is presented in Figure 4, the following equations can be written: Where It is the total current, ∆Pe is the difference active power, Pesh = Re (Vsh * I * sh) and Pese = Re (Vse * I * ji) are active power exchanges between the shunt and series circuit via the DC bus.…”

Section: Calculation Of Apparent Impedance While Upfc Elements Are Pr...mentioning

confidence: 99%

Performance enhancement of distance relay in presence of unified power flow controller

Al-Kaoaz

Alsammak

2023

IJPEDS

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The characteristics of the distance relay are devised based on online and fault impedance. The relay uses fault information to react to the expected state; however, integrating the grid with a unified power flow controller (UPFC) might stop the relay from fault-triggered operations, requiring altered relay characteristics. Building relay tripping parameters are among the critical challenges that must be addressed for transmission line distance relays because current transmission networks face higher stress regarding power system operation. Furthermore, the use of flexible AC transmission systems (FACTS) instruments at the transmission level adversely affects distance relay performance due to impedance differences. The UPFC is among the essential FACTS instruments; it comprises shunt and series converters to alter the apparent relay impedance; hence, it was considered for this study, where a test system during fault was assessed to demonstrate the output of the distance relay before and after using the UPFC. MATLAB was used to build scenarios demonstrating the effect of a UPFC located in the transmission line's midsection or end or not using the UPFC. This research offers an analytical technique to determine the probable effects of UPFC on distance relay characteristics. The outcomes provide new relay characteristics for several fault resistances and locations for fault-specific impedance trajectory reactions.

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Section: Calculation Of Apparent Impedance While Upfc Elements Are Pr...mentioning

confidence: 99%

Performance enhancement of distance relay in presence of unified power flow controller

Al-Kaoaz

Alsammak

2023

IJPEDS

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“…Total transfer capability (TTC) is defined as 'the amount of electric power transferred over the interconnected transmission network in a reliable manner' [7]. Various techniques are available to enhance the transfer capability of the power system [8] among them UPFC application provides a way to enhance TTC of the transfer paths [9]. A practical application of UPFC reported in [2] signifies that maximum value of TTC is achieved in several transfer cases in a deregulated power system.…”

Section: Introductionmentioning

confidence: 99%

Optimal unified power flow controller application to enhance total transfer capability

Rajabi-Ghahnavieh

Fotuhi‐Firuzabad²,

Othman

2015

IET Generation, Transmission & Distribution

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For a power transfer path, total transfer capability (TTC) represents maximum power that can be transferred over the transmission system. Unified power flow controller (UPFC) is a device that can be used to increase in TTC. This study presents a new method for optimal UPFC application to minimise power loss while enhancing TTC. Based on UPFC injection model, the solution region of UPFC parameters is first found using the proposed method to maximise TTC. It then searches the solution region to find optimal UPFC control mode and setting to minimise system power loss. The proposed method is applied to the IEEE-Reliability Test System and the UPFC application impact are evaluated. Comparative studies are conducted between the TTC results obtained by the proposed method with those obtained using the existing approaches.Nomenclature P PI , P SI active power of parallel and series inverters Q PI , Q SI reactive power of parallel and series inverters P P , Q P active and reactive power injection at PB P PB , P SB active power at PB and SB buses Q PB , Q SB reactive power at PB and SB buses V d UPFC series injected voltage with magnitude and phase angle V d of and θ d V PB PB bus voltage with magnitude and phase angle of V PB and θ PB V SB SB bus voltage with magnitude and phase angle of V SB and θ SB V PI voltage of parallel inverter with magnitude and phase angle of V PI and θ PI V SI voltage of series inverter with magnitude and phase angle of V SI and θ SI I SI , I PI current of the series and parallel inverter I PB , I SB current of PB and SB X PT , X ST reactance of parallel and series transformers V Max I maximum output voltage of the inverters I Max I maximum output current of the inverters S Max

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Programming of Simplified Models of Flexible Alternating Current Transmission System (FACTS) Devices Using DIgSILENT Simulation Language

Cepeda¹,

Agüero

Colomé

2014

PowerFactory Applications for Power System Analysis

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Control Active and Reactive Power Flow with UPFC connected in Transmission Line

Cited by 9 publications

References 7 publications

Performance enhancement of distance relay in presence of unified power flow controller

Performance enhancement of distance relay in presence of unified power flow controller

Optimal unified power flow controller application to enhance total transfer capability

Programming of Simplified Models of Flexible Alternating Current Transmission System (FACTS) Devices Using DIgSILENT Simulation Language

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