Real-Time Deployment of a Novel Synchrophasor-Based Voltage Stability Assessment Algorithm

Adewole, Adeyemi Charles; Tzoneva, Raynitchka

doi:10.15866/iree.v9i5.3051

Cited by 9 publications

(12 citation statements)

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“…From the foregoing, it can be seen that there is the need for a practical, easy to implement non‐parametric algorithm based on actual synchrophasor measurements for real‐time online wide area monitoring/assessment of the power system's operating state, the estimation of the system's margin to voltage collapse and the identification of the voltage weak areas. This is the focus of this paper, and its envisaged contribution can be summarized as given thereafter: This paper extends the preliminary work by the authors on the effective generator field current reserve (EGFCR) index using key generators to a wide area‐based real‐time VSA (RVSA) index. A new RVSA index termed effective generator stator current reserve (EGSCR) is proposed. Comparisons between the EGFCR, EGSCR and the effective generator RPR (EGRPR) indices using generator‐based measurements are carried out. Comparisons between generator‐based indices in (iii) and some existing indices are carried out. An adaptive weighted‐summation approach for large interconnected power systems with multiple coherent generators within a local area is newly introduced and compared with the key generator approach. Real‐time synchrophasor measurements from PMUs are used in capturing the state of the system and system dynamics consisting of system loading, changes in the topology, transformer under‐load tap changer (ULTC) action and operation of the generator OXLs. Practical implementation and testing of the proposed VSA indices is performed using a lab‐scale test bed comprising of PMUs, phasor data concentrators (PDCs), programmable logic controller (PLC), real‐time digital simulator® (RTDS), satellite clock and communication network infrastructure. …”

Section: Introductionmentioning

confidence: 86%

“…A RVSA index based on the key generator principle proposed by the authors in is further investigated and applied to a large interconnected power system network in this paper. The formulation is carried out on the basis of the consideration of the voltage collapse point as the limit of the synchronous generator using EGRPR = 0, as

true Q_{g \max}^{normalc} = true Q_{g k}

and

true P_{g \max}^{normalc} = true P_{g k}

at this point based on Equations and .…”

Section: Voltage Stability Assessment Indicesmentioning

confidence: 99%

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Extended synchrophasor-based online voltage stability assessment using synchronous generator-derived indices

Adewole

Tzoneva

2016

Int. Trans. Electr. Energ. Syst.

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Summary This paper proposes and investigates the online application of generator‐derived real‐time voltage stability assessment indices in large interconnected power systems. The indices are based on synchrophasor measurements from synchronous generators and are used in the prediction of the system's margin to voltage collapse in real‐time. Comparative analyses are carried out between the newly proposed indices, an existing effective generator reactive power reserve index, and two line‐based indices. Results obtained from testing the proposed indices on the New England 39‐bus test system show that the proposed indices are simple to implement, more responsive to system dynamics and provide a more accurate estimation of the system's margin to voltage collapse compared with the existing indices. Furthermore, the suitability of the proposed indices for small disturbance voltage instability and large disturbance voltage instability conditions were demonstrated. In addition, the proposed indices are subsequently deployed on a programmable logic controller for real‐time closed‐loop testing with the real‐time digital simulator. Copyright © 2016 John Wiley & Sons, Ltd.

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Section: Introductionmentioning

confidence: 86%

true Q_{g \max}^{normalc} = true Q_{g k}

and

true P_{g \max}^{normalc} = true P_{g k}

at this point based on Equations and .…”

Section: Voltage Stability Assessment Indicesmentioning

confidence: 99%

Extended synchrophasor-based online voltage stability assessment using synchronous generator-derived indices

Adewole

Tzoneva

2016

Int. Trans. Electr. Energ. Syst.

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“…An Effective Generator Field Current Reserve (EGFCR) index derived from the generator reactive power reserve is obtained using (1) [22].…”

Section: Effective Generator Field Current Reserve Indexmentioning

confidence: 99%

“…From (7), the Real-Time Voltage Stability Assessment (RVSA) index derived from the field current of the ith generator is given as [22]:…”

Section: Effective Generator Field Current Reserve Indexmentioning

confidence: 99%

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Wide area Voltage Stability assessment based on generator-derived indices using Phasor Measurement Units

Adewole¹,

Tzoneva²

2015

2015 International Conference on the Industrial and Commercial Use of Energy (ICUE)

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The continuous increase in energy demand without a concomitant increase in generation and transmission capabilities inevitably leads to power system instability and consequently blackouts. This paper proposes and investigates the application of generator-derived Voltage Stability (VS) indices using synchrophasor measurements from dispersed Phasor Measurement Units (PMUs) for real-time monitoring and situational awareness in power systems. Three VS indices derived from the capability parameters of synchronous generators in the power system are presented, and used in the prediction of the power system's margin to voltage collapse. The proposed generator-derived VS indices were tested using the New England 39-bus benchmark test system modelled using RSCAD software. Real-time hardware-in-the-loop simulations involving a lab-scale testbed using the Real-Time Digital Simulator (RTDS), PMUs, Phasor Data Concentrators (PDCs), Programmable Logic Controller (PLC), communication network switches, and GPS satellite clock were carried out in order to test the proposed VS indices for various system operating conditions encompassing credible contingencies, increased system loading, operation of transformer Under-Load Tap Changers (ULTCs), and generator Over Excitation Limiters (OXLs). The results obtained showed that the VS indices provided an exact snap-shot of the grid in real-time. The VS indices would be useful in the design of System Integrity Protection Schemes (SIPS) that are capable of preserving the integrity of the grid during disturbances and parametric changes, thereby preventing system blackouts.

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Adaptive under‐voltage load shedding scheme for large interconnected smart grids based on wide area synchrophasor measurements

Adewole

Tzoneva

Apostolov

2016

IET Generation, Transmission & Distribution

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Real-Time Deployment of a Novel Synchrophasor-Based Voltage Stability Assessment Algorithm

Cited by 9 publications

References 0 publications

Extended synchrophasor-based online voltage stability assessment using synchronous generator-derived indices

Extended synchrophasor-based online voltage stability assessment using synchronous generator-derived indices

Wide area Voltage Stability assessment based on generator-derived indices using Phasor Measurement Units

Adaptive under‐voltage load shedding scheme for large interconnected smart grids based on wide area synchrophasor measurements

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