Reactive Power Management Based on Voltage Sensitivity Analysis of Distribution System with High Penetration of Renewable Energies

Kang, Seok Ju; Kim, Jae-Woo; Park, Jung–Wook; Baek, Seung Mook

doi:10.3390/en12081493

Cited by 19 publications

(14 citation statements)

References 23 publications

(42 reference statements)

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“…In [111], a reactive power management system based on voltage sensitivity analysis that is suitable for new distributed generation systems with high penetration was proposed. The voltage sensitivity characteristics of the whole power system were analyzed, including measurements of the voltage change rate and reactive power under steady-state and transient conditions.…”

Section: Analysis and Verification Cases With Hybrid Distributed Gene...mentioning

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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Section: Analysis and Verification Cases With Hybrid Distributed Gene...mentioning

confidence: 99%

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

2022

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“…In [17], it is evaluated the impact of two reactive power control methods on the on-load tap changer and voltage regulator using active power losses and voltage as the performance index. In [18], an optimal reactive power approach based on a voltage sensitivity matrix is introduced to minimise the voltage variation when several DER are simultaneously disconnected. In [19], an optimal multiobjective approach to regulate the active and reactive power delivered by DER in low-voltage microgrids is proposed.…”

Section: Mandatory Reactive Power Provision By Bilateral Contractsmentioning

confidence: 99%

“…It computed the reactive power output based on DER active power dispatch and local voltage measurement to improve voltage regulation while reducing the network losses. Even though the mentioned methodologies achieve the goal of regulating the reactive power and improving the voltage profile, some of them, such as [13,14,18,20], do not address a global solution for the reactive power management due to being designed to acts locally. Meanwhile, the centralised methods, such as [12,15,16,19], are developed to achieve a global solution to minimise the active power losses or the voltage deviation but not necessarily are developed to address the reactive power control as a service that can provide the microgrid.…”

Section: Mandatory Reactive Power Provision By Bilateral Contractsmentioning

confidence: 99%

Optimal Microgrid–Interactive Reactive Power Management for Day–Ahead Operation

et al. 2021

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The replacement of conventional generation sources by DER creates the need to carefully manage the reactive power maintaining the power system safe operation. The principal trend is to increase the DER volume connected to the distribution network in the coming years. Therefore, the microgrid represents an alternative to offer reactive power management due to excellent controllability features embedded in the DER, which enable effective interaction between the microgrid and the distribution network. This paper proposes a microgrid−iterative reactive power management approach of power-electronic converter based renewable technologies for day-ahead operation. It is designed to be a centralised control based on local measurements, which provides the optimal reactive power dispatch and minimise the total energy losses inside the microgrid and maintain the voltage profile within operational limits. The proposed optimal-centralised control is contrasted against seven local reactive power controls using a techno-economic approach considering the steady−state voltage profile, the energy losses, and the reactive power costs as performance metrics. Three different reactive power pricing are proposed. The numerical results demonstrate the optimal microgrid−interactive reactive power management is the most suitable techno-economic reactive power control for the day−ahead operation.

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“…In the grid model, assuming that the voltage on the slack bus is constant, the bus voltage inside the grid is affected by fluctuations in power flow [18][19][20]. Voltage sensitivity analysis can be used to analyze the relationship between active or reactive power fluctuations and the voltage fluctuations of the internal buses [19].…”

Section: Voltage Sensitivity Analysismentioning

confidence: 99%

A Hybrid Reactive Power Control Method of Distributed Generation to Mitigate Voltage Rise in Low-Voltage Grid

Kim

Song

2020

Energies

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A high penetration of distributed generators, such as solar and wind power generators in low voltage network systems, impose voltage rise problems. Reactive power control of distributed generators can contribute to mitigating the voltage rise. In the existing reactive power control, reactive power was controlled using only one local variable, such as voltage at point of connection or the active power output of distributed generator. In case of PF(P) method, which provides certain power factors, depending on the active power of distributed generator, the voltage regulation ability is strong, but network losses are large. Q(V) method, which provides a certain amount of reactive power depending on the local voltage, has few network losses, but the voltage regulation ability is weak. In this paper, a reactive power control method that combines the PF(P) method and Q(V) method was proposed. The proposed method determines the reactive power output by using the active power of the distributed generator and local voltage variables together. The proposed method improves the voltage regulation ability of the reactive power control, while reducing the network losses, as compared to the existing method. The low voltage network system was modeled and simulated to evaluate the performance of the proposed method, in terms of voltage regulation ability and network losses, and the performance of the proposed method and the existing method were compared and analyzed.

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Reactive Power Management Based on Voltage Sensitivity Analysis of Distribution System with High Penetration of Renewable Energies

Cited by 19 publications

References 23 publications

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

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

Optimal Microgrid–Interactive Reactive Power Management for Day–Ahead Operation

A Hybrid Reactive Power Control Method of Distributed Generation to Mitigate Voltage Rise in Low-Voltage Grid

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