Development of a Control Algorithm for a Static VAR Compensator Used in Industrial Networks

Spasojević, Ljubiša; Papič, I.; Blažič, Boštjan

doi:10.6113/jpe.2014.14.4.754

Cited by 5 publications

(4 citation statements)

References 16 publications

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“…In [2] and [3], the TSC and TCR are applied in a SEIG power system and a proportional integral (PI) closed-loop feedback is used to realize reference voltage tracking. These articles provide a valuable method for line frequency control.…”

Section: Introductionmentioning

confidence: 99%

A Magnetic Energy Recovery Switch Based Terminal Voltage Regulator for the Three-Phase Self-Excited Induction Generators in Renewable Energy Systems

Wei¹,

Kang²,

Huang³

et al. 2015

Journal of Power Electronics

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Distributed generation systems (DGSs) have been getting more and more attention in terms of renewable energy use and new generation technologies in the past decades. The self-excited induction generator (SEIG) occupies an important role in the area of energy conversion due to its low cost, robustness and simple control. Unlike synchronous generators, the SEIG has to absorb capacitive reactive power from the outer device aiming to stabilize the terminal voltage at load changes. This paper presents a novel static VAR compensator (SVC) called a magnetic energy recovery switch (MERS) to serve as a voltage controller in SEIG powered DGSs. In addition, many small scale SEIGs, instead of a single large one, are applied and devoted to promote the generation efficiency. To begin with, an expandable mathematic model based on a d-q equivalent circuit is created for parallel SEIGs. The control method of the MERS is further improved with the objective of broadening its operating range and restraining current harmonics by parameter optimization. A hybrid control strategy is developed by taking both of the stand-alone and grid-connected modes into consideration. Then simulation and experiments are carried out in the case of single and double SEIG(s) generation. Finally, the measurement results verify that the proposed DGS with SVC-MERS achieves a better stability and higher feasibility. The major advantages of the mentioned variable reactive power supplier, when compared to the STATCOM, include the adoption of a small DC capacitor, line frequency switching, simple control and less loss.

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Section: Introductionmentioning

confidence: 99%

A Magnetic Energy Recovery Switch Based Terminal Voltage Regulator for the Three-Phase Self-Excited Induction Generators in Renewable Energy Systems

Wei¹,

Kang²,

Huang³

et al. 2015

Journal of Power Electronics

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“…Microgrids constitute a new trend of new energy utilization, featuring wide energy distribution, various forms, and a high utilization rate [4][5][6][7]. e use of a microgrid power supply fully exploits various renewable energy sources in rural areas and contributes toward maintaining the stability of the microgrid [8][9][10]. However, the input of a large number of nonlinear loads and the uncertainty of the wind and light system cause power imbalance in the microgrid [7].…”

Section: Introductionmentioning

confidence: 99%

Power Balance Optimization Technology of Microgrid Based on Full-Bridge Converter

et al. 2020

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Independent microgrids are widely used in islands and remote townships. However, power imbalance often leads to fluctuations in voltage and frequency, which inhibit the development of AC microgrids. To overcome such problems, this paper proposes an optimized full-bridge converter energy storage structure to realize power balance and optimization of the microgrid. The proposed structure has the characteristics of simple design, easy modularization, and flexible power regulation. First, the working structure and mathematical model are analyzed, and the power model is then established. From the viewpoint of capacitor charging and discharging and inverter, the active and reactive power control technology of the full-bridge structure is analyzed, and a multimode power coordinated control strategy is adopted to adjust and optimize the target power. Finally, the feasibility of the structure and control strategy is verified through a simulation and an experiment. In summary, this study is of great significance to the future promotion and application of AC microgrids.

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“…piecewise function in the cycle from −α to 2π−α. In sum, u MERS can be described by U C , which is mentioned in equation (2). Then, the amplitude of the fundamental MERS voltage (b 1 ) is obtained by ignoring the high-order harmonics through the fast Fourier translation, as expressed in equation (5).…”

Section: B Operating Principle and Mathematical Modelmentioning

confidence: 99%

“…Generally, a static var compensator (SVC) is usually installed near a load in a power system for PFC. The main types of SVC include thyristor switched capacitors (TSCs) [2], thyristor controlled reactors (TCRs), static synchronous compensators (STATCOMs) [3], and parallel-connected magnetic energy recovery switches (MERS) [4].…”

Section: Introductionmentioning

confidence: 99%

Parallel-Connected Magnetic Energy Recovery Switch Used as a Continuous Reactive Power Controller

Wei¹,

Fang²,

Kang³

et al. 2016

Journal of Power Electronics

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Power quality promotion has received increasing attention because of the wide use of semiconductor devices in recent decades. Reactive power regulation is crucial to ensuring the stable operation of power systems. In this study, a continuous reactive power controller, which is referred to as a parallel-connected magnetic energy recovery switch (MERS), is developed to regulate voltage or power factor in power grids. First, the operating principle is introduced, and a mathematical model is built. Second, a new control method for restraining current harmonics and the peak voltages of capacitors is presented. Using the proposed method, the MERS shows a wide range in terms of reactive power compensation. Finally, the performance of the proposed controller is demonstrated through computer simulations and experiments. Unlike STATCOMs, the proposed controller entails low losses, adopts a small dc capacitor, and offers ease of use.

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Development of a Control Algorithm for a Static VAR Compensator Used in Industrial Networks

Cited by 5 publications

References 16 publications

A Magnetic Energy Recovery Switch Based Terminal Voltage Regulator for the Three-Phase Self-Excited Induction Generators in Renewable Energy Systems

A Magnetic Energy Recovery Switch Based Terminal Voltage Regulator for the Three-Phase Self-Excited Induction Generators in Renewable Energy Systems

Power Balance Optimization Technology of Microgrid Based on Full-Bridge Converter

Parallel-Connected Magnetic Energy Recovery Switch Used as a Continuous Reactive Power Controller

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