Voltage instability detection using synchrophasor measurements: A review

As the use of photovoltaics becomes more widespread, new technologies for more efficient energy generation, transmission, and distribution based on power electronics converters are being developed. The most common applications are grid-on, energy storage, hybrid, and high voltage gain applications. These applications impose several additional requirements in the design of power converters associated with the solar battery’s maximum power tracking and operation in a wide range of input currents and voltages. The practical realization of such solutions can be implemented on the basis of various topologies, which requires a preliminary application of criteria for assessing their effectiveness. The paper conducts a comparison of different topologies on power converters based on two parameters that describe their cost and power loss for various PV applications. For a straightforward study, these parameters are represented using the gain factor, which allows for an accurate comparison of the efficiency of various types of converters.

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“…Voltage stabilization [60][61][62][63][64][65] Voltage and frequency ride through, voltage sag detection, reactive power generation…”

Section: Sinusoidal Pulse Width Modulation (Spwm) Space Vector Modula...mentioning

confidence: 99%

Power Converter Solutions for Industrial PV Applications—A Review

et al. 2022

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“…This response time is not enough for the LVRT operation, as longer detection time prolongs the corrective action. 47 A severe voltage sag can damage the inverter even before the voltage sag is detected by the RMS method. Many methods have been proposed in the literature to improve the sag detection accuracy and time.…”

Section: Low Voltage Sag Detectionmentioning

confidence: 99%

Grid‐connected photovoltaic inverters with low‐voltage ride through for a residential‐scale system: A review

Talha

Amir

Raihan

et al. 2020

Int Trans Electr Energ Syst

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Background: Recent advancements in solar power generation technology have paved the way for a vast number of photovoltaic (PV) systems integration into the grid network. The global installed capacity of rooftop PV systems has already surpassed a 50 GW mark in 2020, while the total installed capacity of all types of PV systems is reaching beyond 500 GW. The influx of distributed PV-generators must be equipped with sophisticated control to ensure grid stability, especially during grid faults. A devastating grid outage may occur if the grid-tied PV inverters are not equipped with the "fault-ride-through" mechanism. Many countries have already enforced a mandatory grid code which includes a low-voltage-ride through requirements for PV-generators. Aim and Objective: This paper reviews the design of a rooftop PV inverters in the light of low-voltage-ride-through requirements.Materials and Methods: For the implementation of low-voltage-ride-through (LVRT), the design of low-voltage-sag detection, grid-synchronization, filterselection, and power-controllers are examined through simulations and literature survey. LVRT implementation issues are highlighted with an emphasis on the current controller performance during grid sags.Results and Discussion: From the review and analysis conducted in this study, this paper concludes that ensuring a stable DC-link and appropriate control-reference-signals during the grid faults are the keys to the LVRT implementation. Conclusion:In addition to robust power control, an autonomous PV generator should promptly detect the grid conditions and fulfils the ancillary services

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“…Early diagnosis of voltage instability in power system gained much attention from the past two decades, as it could trigger a complete or partial blackout in the system. Voltage instability detection in real-time can be done by utilizing synchrophasor measurements [2]. Phasor measurement units (PMU) are the main devices for synchrophasor measurements.…”

Section: Introductionmentioning

confidence: 99%

A novel load shedding methodology to mitigate voltage instability in power system

Chappa¹,

Thakur

2022

Electrical Engineering & Electromechanics

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Aim. A novel technique for detecting imminent voltage instability is proposed in this paper, accompanied by a novel load shedding approach to protect the system from voltage instability. Methodology. The proposed methodology utilizes the computation of nodal reactive power loss to voltage sensitivities with load increments in the system. Originality. The nodal reactive power loss to voltage sensitivity is a novel computation and is explored to detect the likelihood of voltage instability in this work. Results. If the system is experiencing an unprecedented load growth and if all the measures reach their limits, then load shedding is the last resort to safeguard the system against instability. The sudden change in nodal reactive power loss to voltage sensitivities is utilized to devise the quantity of load to be cut in the system. Practical value. The time-based simulations performed in New England 39 bus test system (NE-39 bus), the simulated results show that nodal reactive power loss to voltage sensitivities can be used as a trusted indicator for early diagnosing of menacing voltage instability and the timely implementation of load shedding developed from nodal reactive power loss to voltage sensitivities on the system ensures voltage stability.

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Voltage instability detection using synchrophasor measurements: A review

Cited by 7 publications

References 112 publications

Power Converter Solutions for Industrial PV Applications—A Review

Power Converter Solutions for Industrial PV Applications—A Review

Grid‐connected photovoltaic inverters with low‐voltage ride through for a residential‐scale system: A review

A novel load shedding methodology to mitigate voltage instability in power system

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