Mitigation of switching overvoltages in microgrids based on SVC and supercapacitor

Awad, Eman; Badran, Ebrahim A.; Youssef, Fathi H.

doi:10.1049/iet-gtd.2017.0503

Cited by 13 publications

(7 citation statements)

References 21 publications

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“…It usually consists of banks of capacitors and reactors controlled by Thyristors, as displayed in Figure 1. SVC devices are usually used for damping the voltage oscillations and improving the system voltage as they can inject or absorb reactive power from the system [26].…”

Section: Static Var Compensator (Svc)mentioning

confidence: 99%

An Effective Bi-Stage Method for Renewable Energy Sources Integration into Unbalanced Distribution Systems Considering Uncertainty

et al. 2021

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The output generations of renewable energy sources (RES) depend basically on climatic conditions, which are the main reason for their uncertain nature. As a result, the performance and security of distribution systems can be significantly worsened with high RES penetration. To address these issues, an analytical study was carried out by considering different penetration strategies for RES in the radial distribution system. Moreover, a bi-stage procedure was proposed for optimal planning of RES penetration. The first stage was concerned with calculating the optimal RES locations and sites. This stage aimed to minimize the voltage variations in the distribution system. In turn, the second stage was concerned with obtaining the optimal setting of the voltage control devices to improve the voltage profile. The multi-objective cat swarm optimization (MO-CSO) algorithm was proposed to solve the bi-stages optimization problems for enhancing the distribution system performance. Furthermore, the impact of the RES penetration level and their uncertainty on a distribution system voltage were studied. The proposed method was tested on the IEEE 34-bus unbalanced distribution test system, which was analyzed using backward/forward sweep power flow for unbalanced radial distribution systems. The proposed method provided satisfactory results for increasing the penetration level of RES in unbalanced distribution networks.

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Section: Static Var Compensator (Svc)mentioning

confidence: 99%

An Effective Bi-Stage Method for Renewable Energy Sources Integration into Unbalanced Distribution Systems Considering Uncertainty

et al. 2021

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“…Liu, et al introduced an application of the STATCOM on type-4 WECS considering under voltage load shedding [18]. In [24], SVC and super-capacitor are incorporated to mitigate the overvoltage in a micro grid comprising WECS and hydro generator units. A UPFC is introduced in [25] to mitigate the sub-synchronous resonance in seriescompensated wind farms.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of DFIG LVRT Capability During Extreme Short-Wind Gust Events Using SMES Technology

Yunus¹,

Abu-Siada

Masoum

et al. 2020

IEEE Access

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Wind energy is one of the premier renewable energy sources that have gained popularity during the last decade. Among the currently available wind energy conversion systems (WECS), doubly fed induction generator-based technology has been widely employed due to its superior advantageous. The key features of the DFIG-based WECS include its ability to capture more wind energy and support the grid with large reactive power during short disturbance events. On the other hand, DFIG is very sensitive to grid faults which affect its fault ride through (FRT) capability. Furthermore, extreme wind gust even for short durations may lead to the violation of the low voltage ride through (LVRT) threshold limits set by worldwide transmission line operators. This situation cannot be mitigated by the turbine blades pitch controller since the response of the pitch mechanical control is much slower than the rapid dynamic change in the wind speed during short duration of wind gust events. While DFIG FRT capability has been discussed in several papers in the literature, not much attention was given to the mitigation of the effects of extreme wind gust of short duration on the DFIG performance. In this paper, the effect of various levels of wind gust on the performance of a DFIG-based wind energy conversion grid-connected system is investigated and mitigated using a new controller for superconducting magnetic energy storage (SMES) unit. A combination of hysteresis current and fuzzy logic controllers is employed to control the voltage source converter and the DC-DC chopper interfacing the SMES coil with the investigated system. Simulation results reveal the effectiveness of the proposed SMES controller that can be easily implemented within existing as well as new WECS installations.INDEX TERMS Doubly fed induction generator, low voltage ride through, superconducting magnetic energy storage, wind gust.

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“…Authors showed that with the proposed storage system, voltage drops, and harmonic voltage and current distortion at the wind farm output can be improved when a short circuit occurs in the connection with the power grid. Flexible AC Transmission Systems (FACTS) devices have been proposed and applied in power transmission systems and in this situation, Static Var Compensator (SVC) is used to enhance the voltage stability [6,7]. In large systems, the SVC is located in the middle of the transmission line to reduce the oscillation of the system and thus improve grid stability [8,9].…”

Section: Introductionmentioning

confidence: 99%

Hybrid PSO-Optimized ANFIS-Based Model to Improve Dynamic Voltage Stability

Truong

Bui

2019

Eng. Technol. Appl. Sci. Res.

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The objective of this paper is to perform a hybrid design for an Adaptive Neuro-Fuzzy Inference System (ANFIS) optimized by Particle Swarm Optimization (PSO) to improve the dynamic voltage stability of a grid-connected wind power system. An onshore 99.2MW wind farm using Doubly Fed Induction Generator (DFIG) is studied. To compensate the reactive power absorbed from the power grid of the wind farm, a Static VAR Compensator (SVC) is proposed. To demonstrate the performance of the proposed hybrid PSO–ANFIS controller, simulations of the voltage response in time-domain are performed in Matlab to evaluate the effectiveness of the designed controller. From the results, it can be concluded that the proposed hybrid PSO-optimized ANFIS-based model can be applied to enhance the dynamic voltage stability of the studied grid-connected wind power system.

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Mitigation of switching overvoltages in microgrids based on SVC and supercapacitor

Cited by 13 publications

References 21 publications

An Effective Bi-Stage Method for Renewable Energy Sources Integration into Unbalanced Distribution Systems Considering Uncertainty

An Effective Bi-Stage Method for Renewable Energy Sources Integration into Unbalanced Distribution Systems Considering Uncertainty

Enhancement of DFIG LVRT Capability During Extreme Short-Wind Gust Events Using SMES Technology

Hybrid PSO-Optimized ANFIS-Based Model to Improve Dynamic Voltage Stability

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