Voltage Stability Analysis of Islanded Microgrid

Qin, Wen Ping; Dong, Dong; Mi, Xiao

doi:10.4028/www.scientific.net/amr.846-847.199

Cited by 3 publications

(4 citation statements)

References 2 publications

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“…This algorithm fits the G(x)-λ with a polynomial function. Through mass numerical experiments [1], it is found that the parabolic approximation can guarantee both relatively high accuracy and efficiency. The parabolic function can be expressed as P(λ) = a(λb) 2 + c, where a, b, and c are constant coefficients.…”

Section: ) General Theorymentioning

confidence: 99%

“…It bases on the frequency variation of microgrid systems and avoids the frequent comparison of the voltage amplitudes in different nodes. The step control equation in [1] is shown as…”

Section: B Adaptive Step Size Controlmentioning

confidence: 99%

“…At present, researches on power flow calculation model have been relatively mature, but the academic researches mainly focus on the power flow calculation algorithms. The research dilemma on microgrid power flow calculation is mainly manifested in the problem that the isolated microgrid is prone to Jacobian matrix singularity in the peer-to-peer control mode and the chance of non-convergence is greatly increased when the load power reaches a critical value [1].…”

Section: Introductionmentioning

confidence: 99%

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Fast Calculation Method for Continuous Power Flow of Microgrid Based on Levenberg-Marquardt Algorithm

2023

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There are possible non-convergence problems at load power critical value while using conventional continuous power flow methods. Generally, the step control method is used in the calculation to perform the calculation in small steps at the convergence to the load power critical value, and this method sacrifices the speed of the calculation although the calculation accuracy is high. In this paper, the Levenberg-Marquardt algorithm is used to search for the load power critical value firstly, and after that the step control algorithm is designed to perform fast power flow finding with known load power critical value, which takes into account the computational accuracy and computational efficiency. The case shows that the fast calculation method for continuous power flow of microgrid based on Levenberg-Marquardt algorithm proposed in this paper can guarantee the accuracy while effectively improving the calculation speed, and is suitable for online real-time evaluation of voltage stability and preventive control aided decision online calculation of isolated microgrid with high requirements for real-time.INDEX TERMS Auxiliary factors two-step algorithm, continuous power flow, Levenberg-Marquardt algorithm, microgrid.

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Section: ) General Theorymentioning

confidence: 99%

“…It bases on the frequency variation of microgrid systems and avoids the frequent comparison of the voltage amplitudes in different nodes. The step control equation in [1] is shown as…”

Section: B Adaptive Step Size Controlmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fast Calculation Method for Continuous Power Flow of Microgrid Based on Levenberg-Marquardt Algorithm

2023

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“…Ranges from 0.25 to 0 (No load to collapse point) [82] Sensitivity matrix Linearized load flow equation Static…”

Section: System-variable-based Vsismentioning

confidence: 99%

Analytical Methods of Voltage Stability in Renewable Dominated Power Systems: A Review

2022

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The ongoing development of renewable energy and microgrid technologies has gradually transformed the conventional energy infrastructure and upgraded it into a modernized system with more distributed generation and localized energy storage options. Compared with power grids utilizing synchronous generation, inverter-based networks cannot physically provide large amounts of inertia, which means that more advanced and extensive studies regarding stability considerations are required for such systems. Therefore, appropriate analytical methods are needed for the voltage stability analysis of renewable-dominated power systems, which incorporate a large number of inverters and distributed energy sources. This paper provides a comprehensive literature review of voltage stability analyses of power systems with high levels of renewable energy penetration. A series of generalized evaluation schemes and improvement methods relating to the voltage stability of power systems integrated with various distributed energy resources are discussed. The existing voltage stability analysis methods and corresponding simulation verification models for microgrids are also reviewed in a systematic manner. The traditional and improved voltage stability analysis methods are reviewed according to the microgrid operation mode, the types of distributed generators, and the microgrid configurations. Moreover, the voltage stability indices, which play a crucial role in voltage stability assessments, are critically evaluated in terms of the applicable conditions. The associated modeling and simulation techniques are also presented and discussed. This contribution presents guidelines for voltage stability analysis and instability mitigation methods for modern renewable-rich power systems.

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A Comprehensive Review of Microgrid Technologies and Applications

Monchusi

2023

2023 International Conference on Electrical, Computer and Energy Technologies (ICECET)

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Voltage Stability Analysis of Islanded Microgrid

Cited by 3 publications

References 2 publications

Fast Calculation Method for Continuous Power Flow of Microgrid Based on Levenberg-Marquardt Algorithm

Fast Calculation Method for Continuous Power Flow of Microgrid Based on Levenberg-Marquardt Algorithm

Analytical Methods of Voltage Stability in Renewable Dominated Power Systems: A Review

A Comprehensive Review of Microgrid Technologies and Applications

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