Variation of UPFC controllable parameters during power swing and their impacts on distance relay

Khodaparast, Jalal; Khederzadeh, Mojtaba; Silva, Filipe Miguel Faria da; Bak, Claus Leth

doi:10.1049/iet-gtd.2016.1375

Cited by 14 publications

(7 citation statements)

References 27 publications

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“…Phasor model of this system is programmed by MFILE in MATLAB. Phasor model of UPFC is programmed by time‐varying controlled series voltage source, which provides desired active and reactive power at Bus 2 . Amplitude and the phase of series voltage are

false| V_{s e} false(t false) false| = \sqrt{false{{false(false| V_{2} false| c o s δ_{2} - false| V_{1} false(t false) false| c o s δ_{1} false(t false) false)}^{2} + {false(false| V_{2} false| s i n δ_{2} - false| V_{1} false(t false) false| s i n δ_{1} false(t false) false)}^{2} false}}

ρ^{'} false(t false) = t a n^{- 1} false(\frac{false| V_{2} false| s i n δ_{2} - false| V_{1} false(t false) false| s i n δ_{1} false(t false)}{false| V_{2} false| c o s δ_{2} - false| V_{1} false(t false) false| c o s δ_{1} false(t false)} false) .

Moreover, shunt branch of UPFC is programmed by time‐varying controlled current source.…”

Section: Simulation Resultsmentioning

confidence: 99%

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Performance of power swing blocking methods in UPFC-compensated line

Khodaparast

Khederzadeh

Silva

et al. 2017

Int Trans Electr Energ Syst

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Summary Power swing blocker (PSB) is a complementary part in distance relay that detects power swing. Unified power flow controller (UPFC) is also used in a transmission line to control active and reactive power. The UPFC operation during power swing influences the performance of PSBs in different ways. In this paper, 4 PSB methods are programmed, and their indices are analyzed in UPFC‐compensated line. The methods based on (1) rate of change of power and (2) fundamental frequency of instantaneous 3‐phase active power are used to show the influence of nontransient response of UPFC. The method based on rate of change of impedance is used to show the influence of transient response of UPFC. Method based on transient monitor is used to show the impact of electrical part of UPFC. Indices of these methods are examined in compensated condition, and it is shown that indices may no longer work.

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false| V_{s e} false(t false) false| = \sqrt{false{{false(false| V_{2} false| c o s δ_{2} - false| V_{1} false(t false) false| c o s δ_{1} false(t false) false)}^{2} + {false(false| V_{2} false| s i n δ_{2} - false| V_{1} false(t false) false| s i n δ_{1} false(t false) false)}^{2} false}}

ρ^{'} false(t false) = t a n^{- 1} false(\frac{false| V_{2} false| s i n δ_{2} - false| V_{1} false(t false) false| s i n δ_{1} false(t false)}{false| V_{2} false| c o s δ_{2} - false| V_{1} false(t false) false| c o s δ_{1} false(t false)} false) .

Moreover, shunt branch of UPFC is programmed by time‐varying controlled current source.…”

Section: Simulation Resultsmentioning

confidence: 99%

“…Phasor model of UPFC is programmed by time-varying controlled series voltage source, which provides desired active and reactive power at Bus 2. 30 Amplitude and the phase of series voltage are…”

Section: Impact Of Nontransient Response Of Control Part Of Upfcmentioning

confidence: 99%

Performance of power swing blocking methods in UPFC-compensated line

Khodaparast

Khederzadeh

Silva

et al. 2017

Int Trans Electr Energ Syst

Self Cite

View full text Add to dashboard Cite

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“…For multi-machine systems with UPFCs, an energy function is developed and applied for direct estimation of the critical clearing time [90]. A fault analysis model is developed to quantify the impact of UPFC on the performance of the distance relay during power swing [188].…”

Section: Fault Analysis Modelsmentioning

confidence: 99%

Unified power flow controllers in smart power systems: models, methods, and future research

Georgilakis

Hatziargyriou

2019

IET Smart Grid

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Power flow control has become increasingly important in recent years in the area of smart power systems that have to integrate increased shares of variable renewable energy sources. The unified power flow controller (UPFC) provides in realtime, simultaneously or selectively, active and reactive power flow control as well as voltage control in smart power systems. Several models and methods have been suggested for the control, analysis, operation, and planning of UPFCs in smart power systems. This study introduces a review of the state-of-the-art models and methods of UPFCs in smart power systems, analysing and classifying current and future research trends in this field.

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“…This has led to the MMCC [5,6], which provides superior features of modularity, scalability, low harmonic contents in voltage waveforms at low switching frequencies. The MMCC has gained huge attention because of its vast industrial application in grid-connected converters [7], static synchronous compensators [8,9,10], unified power flow controllers [11,12,13] and HVDC transmission system [14,15,16].…”

Section: Introductionmentioning

confidence: 99%

Carrier-based sinusoidal pulse-width modulation techniques for flying capacitor modular multi-level cascaded converter

Oghorada

Zhang

Esan

et al. 2019

Heliyon

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Carrier-based sinusoidal pulse-width modulation (PWM) techniques, such as phase disposoed PWM(PD-PWM) and phase shifted PWM (PS-PWM), are widely applied to control the modular multilevel cascaded converters (MMCC) having full H-bridge as sub-modules. This paper evaluates these PWM techniques when controlling a variant of the H-bridge MMCC, i.e. the MMCC five-level flying capacitor converter as sub-modules. This MMCC poses an extra challenge to PWM schemes; namely maintaining two inner floating capacitor voltage balancing. Two novel PWM techniques known as the swapped carrier PWM techniques are introduced for the control of this converter. The paper compares them with the two conventional ones using a performance metrics composed of voltage waveform performance, capability in natural flying capacitor voltage balancing, converter power loss, and switch utilisation. The results show that the proposed new PWM schemes outperform both conventional methods in both switching and conduction power losses and achieve similar performance like the PS-PWM under the three other metrics.

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Variation of UPFC controllable parameters during power swing and their impacts on distance relay

Cited by 14 publications

References 27 publications

Performance of power swing blocking methods in UPFC-compensated line

Performance of power swing blocking methods in UPFC-compensated line

Unified power flow controllers in smart power systems: models, methods, and future research

Carrier-based sinusoidal pulse-width modulation techniques for flying capacitor modular multi-level cascaded converter

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