Local voltage-stability index using tellegen's Theorem

Smon, I.; Verbič, Gregor; Gubina, F.

doi:10.1109/pes.2007.385594

Cited by 66 publications

(107 citation statements)

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“…However, the system collapses if the index value is more than 1.2. For example, because of the outage of line (13)(14) the index value is 1.1 and 0.7 for L s and L d type loads, respectively. The TDS result shows that in both cases the system remains stable after outage of line (13)(14).…”

Section: Testingmentioning

confidence: 99%

“…For example, because of the outage of line (13)(14) the index value is 1.1 and 0.7 for L s and L d type loads, respectively. The TDS result shows that in both cases the system remains stable after outage of line (13)(14). However, in case of the outage of line (15-16) (for system with L s type load) the index value is more than the threshold and the TDS result also shows that the system collapses because of outage of line 15-16.…”

Section: Testingmentioning

confidence: 99%

“…However, because of non-linearity of the network, the sensitivity study is valid only in a limited region around the actual operating point [9]. Thevenin's equivalent parameters and maximum power flow through a line are also used for assessing the dynamic voltage stability condition of a power system [12][13][14][15]. In this method, it is considered that instability will occur if the load bus impedance becomes equal to the Thevenin's equivalent impedance seen by the load bus.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

V–Q sensitivity‐based index for assessment of dynamic voltage stability of power systems

Konar¹,

Chatterjee²,

Patra³

2015

IET Generation, Transmission & Distribution

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A large signal voltage stability index is proposed in this study. Although the study focuses on a wind farm connected system, the index can predict instability of any power system. The index gives an idea about the stability margin of the power system under a given operating condition and can be used to predict emergency situations following a large disturbance such as line outage. The proposed index can be used effectively for systems with static as well as dynamic loads. The proposed index is verified in standard test systems. Matrix perturbation theory is used to verify the viability of the index.

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Section: Testingmentioning

confidence: 99%

Section: Testingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

V–Q sensitivity‐based index for assessment of dynamic voltage stability of power systems

Konar¹,

Chatterjee²,

Patra³

2015

IET Generation, Transmission & Distribution

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“…Voltage stability has become an important concern for utilities. Many static voltage stability indices have been proposed in the past, such as the load margin index based on a PV curve [1] or optimal methods [2], sensitivity-based indices [1], eigenvalue or singularity indices [3], impedance-based indices [4], and line loadability indices [5][6][7][8]. Most studies of these indices have been carried out on transmission systems.…”

Section: Introductionmentioning

confidence: 99%

Letter to the Editor: A New Line Loadability Index for Radial Distribution Systems

Li²,

Yan

2008

Electric Power Components and Systems

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“…Phasor measurement unit (PMU)-based local measurements of a bus were utilised to represent the rest of the system as a 'Thevenin's Equivalent' source with respect to a selected bus of a power system [23,24].…”

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confidence: 99%

Use of local bus measurements for operational planning of a power system

Hazarika¹,

Talukdar²,

Das

2013

IET Generation, Transmission & Distribution

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This study describes a method to prepare operational planning of a power system using the measurements of bus variables. For this purpose, voltage and current phasors of a target bus have to be measured for two consecutive time instances. These measurements are then used to determine the Thevenin's equivalent voltage and impedance of the system. The Thevenin's equivalent voltage, impedance and bus voltage of the target bus are used to derive sensitivity relations for change in real and reactive powers with respect to change in the bus voltage of the target bus. The sensitivity relations are utilised in the decision-making process, during operational planning of a power system. Nomenclature P kinjected active power at kth bus Q k injected reactive power at kth bus P k (t) measured value of injected active power at kth bus at time t Q k (t) measured value of injected reactive power at kth bus at time t P Dk active power demand at kth bus Q Dk reactive power demand at kth bus P Gk active power generated by kth generator Q Gk reactive power generated by kth generator P GT total real power generation P DT total real power demand P LOSS total real power loss Q GT total reactive power generation Q DT total reactive power demand Q LOSS total reactive power loss V k = e k + jf k voltage at kth bus V min k minimum allowable bus voltage at kth bus (0.95 pu) cos φ k (t) load power factor of kth load bus at time instance t

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Local voltage-stability index using tellegen's Theorem

Cited by 66 publications

References 0 publications

V–Q sensitivity‐based index for assessment of dynamic voltage stability of power systems

V–Q sensitivity‐based index for assessment of dynamic voltage stability of power systems

Letter to the Editor: A New Line Loadability Index for Radial Distribution Systems

Use of local bus measurements for operational planning of a power system

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