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Voltage regulation

About: Voltage regulation is a research topic. Over the lifetime, 35375 publications have been published within this topic receiving 472949 citations.


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Book
01 Dec 1993
TL;DR: In this article, a clear, in-depth explanation of voltage stability, covering both transient and longer-term phenomena and presenting proven solutions to instability problems, is presented, along with planning and operating guidelines, computer methods for power flow and dynamic simulation, and descriptions of actual voltage instability incidents.
Abstract: Voltage stability is a major concern in the planning and operation of electric power systems. This book provides a clear, in-depth explanation of voltage stability, covering both transient and longer-term phenomena and presenting proven solutions to instability problems. The book describes equipment characteristics for transmission, generation, and distribution/load subsystems of a power system, together with methods for the modelling of equipment. Readers will find static and dynamic computer simulation examples for small equivalent power systems and for a very large power system, plus an account of voltage stability associated with HVDC links. They will also get helpful planning and operating guidelines, computer methods for power flow and dynamic simulation, and descriptions of actual voltage instability incidents.

1,355 citations

Book
31 Mar 1998
TL;DR: In this paper, the authors present a model for voltage security assessment based on loadability, sensitivity, and Bifurcation analysis, and present a set of criteria and methods for Voltage Security Assessment.
Abstract: Foreword. Preface. Part I: Components and Phenomena. 1. Introduction. 2. Transmission System Aspects. 3. Generation Aspects. 4. Load Aspects. Part II: Instability Mechanisms and Analysis Methods. 5. Mathematical Background. 6. Modelling: System Perspective. 7. Loadability, Sensitivity and Bifurcation Analysis. 8. Instability Mechanisms and Countermeasures. 9. Criteria and Methods for Voltage Security Assessment. References. Index.

1,350 citations

Proceedings ArticleDOI
16 Jul 2000
TL;DR: In this paper, the authors described a few of the issues that must be considered to insure that DG will not degrade distribution system power quality, safety or reliability, although some of these issues are common to low voltage distribution networks.
Abstract: Distributed generation (DG) has much potential to improve distribution system performance and it should be encouraged. However, distribution system designs and operating practices are normally based on radial power flows and this creates a special challenge to the successful introduction of distributed generation. This paper has described a few of the issues that must be considered to insure that DG will not degrade distribution system power quality, safety or reliability. This paper focused on radial systems, although some of the issues discussed are common to low voltage distribution networks.

1,316 citations

Journal ArticleDOI
TL;DR: In this paper, a modified phase-shifted carrier-based pulsewidth-modulation (PSC-PWM) scheme for modular multilevel converters (MMC) is presented.
Abstract: This paper describes a modified phase-shifted carrier-based pulsewidth-modulation (PSC-PWM) scheme for modular multilevel converters (MMC). In order to reduce the average device switching frequency, a reduced switching-frequency (RSF) voltage balancing algorithm is developed. This paper also proposes a circulating current suppressing controller (CCSC) to minimize the inner circulating current in an MMC. Based on the double line-frequency, negative-sequence rotational frame, the three-phase alternative circulating currents are decomposed into two dc components and are minimized by a pair of proportional integral controllers. Simulation results based on a detailed PSCAD/EMTDC model prove the effectiveness of the modified PSC-PWM method and the RSF voltage-balancing algorithm. The proposed CCSC not only eliminates the inner circulating current but also improves the quality of the converter ac output voltage. A simple loss evaluation demonstrates that the RSF voltage-balancing algorithm and the CCSC reduce the converter power losses.

1,183 citations

Journal ArticleDOI
TL;DR: In this paper, the authors investigated preplanned switching events and fault events that lead to islanding of a distribution subsystem and formation of a micro-grid, and they concluded that an appropriate control strategy for the power electronically interfaced DG unit can ensure stability of the microgrid and maintain voltage quality at designated buses, even during islanding transients.
Abstract: This paper investigates (i) preplanned switching events and (ii) fault events that lead to islanding of a distribution subsystem and formation of a micro-grid. The micro-grid includes two distributed generation (DG) units. One unit is a conventional rotating synchronous machine and the other is interfaced through a power electronic converter. The interface converter of the latter unit is equipped with independent real and reactive power control to minimize islanding transients and maintain both angle stability and voltage quality within the micro-grid. The studies are performed based on a digital computer simulation approach using the PSCAD/EMTDC software package. The studies show that an appropriate control strategy for the power electronically interfaced DG unit can ensure stability of the micro-grid and maintain voltage quality at designated buses, even during islanding transients. This paper concludes that presence of an electronically-interfaced DG unit makes the concept of micro-grid a technically viable option for further investigations.

1,136 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023104
2022289
2021625
2020985
20191,070
20181,079