Study On Impact Of Power System Inertial Stability by Renewable Energy Sources

Yadav, Sweety Kumari; Nagarajan, S. T.

doi:10.1109/iciccsp53532.2022.9862342

Cited by 2 publications

(4 citation statements)

References 4 publications

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“…Te voltage angle diference (δ s − δ R ) has been implemented to trip at out-of-step condition after collecting PMUs data [30], as shown in Figure 5.…”

Section: Proposed Algorithmmentioning

confidence: 99%

“…Each area has two generators and fve buses in addition to the two middle lines with a bus; thus, there are 11 buses. Two loads are connected with buses 4 and 6, and detailed parameters are in [30]. Te transmitted power from bus 4 to 6 has been measured, and two PMUs have been connected with bus 3 and bus 7.…”

Section: Case Study Ii: Kundur Two Area System (Interarea Mode)mentioning

confidence: 99%

“…In this section, the efect of inertia has been observed by applying a three-phase fault on one of the lines between bus 5 and bus 6 at 1 sec; then, the fault has been cleared at 1.08 sec [30]. Under this condition, two subscenarios have been studied, giving the inertia of generator 3 two values (6.175 and 3.175).…”

Section: Scenario Ii: Change In Inertiamentioning

confidence: 99%

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Analysis of Oscillations during Out-of-Step Condition in Power Systems

Alnassar

Nagarajan

2023

International Transactions on Electrical Energy Systems

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Power systems interconnected by weak tie lines can be subject to low-frequency oscillations because of disturbances which excites the low-frequency modes of the system; furthermore, these oscillations can be stable or unstable. The latter, if not treated, can cause severe oscillations that divide the network into smaller groups which oscillate against each other, leading to out-of-step (OOS) condition in the network. The detection of OOS condition is a challenge for power system operators in real time as it is difficult with conventional measuring instruments, to identify the instant at which the bus voltage angle between two areas connected by tie line falls out of synchronism. Conventionally, the detection of OOS condition has been carried out with impedance-based relays along with power swing blocking. With the advent of synchrophasor-based measurement units, it is now possible to measure the bus voltage angle in real time leading to direct detection of OOS condition in power system and intentional islanding. In this article, a systematic analytical study and EMT time-domain simulation study have been performed to simulate OOS condition in the power systems, and its detection is based on the voltage angle difference with wide-area measurement systems (WAMSs). The article has been carried out on a single machine infinite bus (SMIB) to monitor generator OOS, Kundur’s two-area system to detect interarea OOS, and the IEEE39 bus system to identify OOS condition and with a new algorithm. Time-domain simulation studies carried out with OPAL-RT real-time simulator in HYPERSIM environment corroborates with analytical results.

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“…Te voltage angle diference (δ s − δ R ) has been implemented to trip at out-of-step condition after collecting PMUs data [30], as shown in Figure 5.…”

Section: Proposed Algorithmmentioning

confidence: 99%

Section: Case Study Ii: Kundur Two Area System (Interarea Mode)mentioning

confidence: 99%

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Analysis of Oscillations during Out-of-Step Condition in Power Systems

Alnassar

Nagarajan

2023

International Transactions on Electrical Energy Systems

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“…The new matrix variables are given by positive definite matrix 𝑌 = 𝑃 ̃−1 and matrix 𝑄. Hence, the estimator design problem is equivalent to the programming problem expressed in terms of LMI (13). The estimator matrix is defined by 𝐴 𝑓 = 𝐴 𝑛 − 𝐵 𝑓 𝐶 𝑛 ; 𝐵 𝑓 = −𝑌 −1 𝑄; 𝐶 𝑓 = 𝐶 𝑔 .…”

Section: Nominal Casementioning

confidence: 99%

Total power deficit estimation for isolated power system network using H∞ norm method

et al. 2023

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An isolated electrical network with an independent local distributed generator is very sensitive towards the contingencies between load demand and supply. Although the network system has less complexity in term of structure, its stability condition is crucial due to its stand-alone operating condition. Hence, to monitor the stability of the network, total power deficit is the only variable that can be estimated. This study proposed to utilize the filtering problem to design an estimator that can estimate the total power deficiency. For verification, the design estimator was tested under two cases which are nominal case and parameter uncertainty case. In nominal case, the system parameters are assumed to be known while in parameter uncertainty case the system has contaminated with uncertain parameter where its admissible value is laying in a given polytope. With complying the linear matrix inequality (LMI) constraint, the main objective function of the norm was guaranteed with minimum upper bound. The results show that the dynamical behaviors of designed estimator successfully trace the actual power deficit signal at steady state with minimal estimation error.

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Study On Impact Of Power System Inertial Stability by Renewable Energy Sources

Cited by 2 publications

References 4 publications

Analysis of Oscillations during Out-of-Step Condition in Power Systems

Analysis of Oscillations during Out-of-Step Condition in Power Systems

Total power deficit estimation for isolated power system network using H∞ norm method

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