An AGC implementation for system islanding and restoration conditions

Roos, H.B.; Zhu, Ning; Giri, J.; Kindel, B.

doi:10.1109/59.336124

Cited by 30 publications

(12 citation statements)

References 5 publications

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“…In their daily normal operation, utilities often reschedule area generation to provide sufficient area spinning and effective (dynamic) reserve to overcome loss of a significant area generation. Typically, the area spinning reserves (area generation capacity less output) are distributed in proportion to the area generators' frequency response rates to maximize the area regulation [20], [27], [28].…”

Section: A 640-bus Interconnectionmentioning

confidence: 99%

On Power System Controlled Separation

Adibi¹,

Kafka²,

Maram

et al. 2006

IEEE Trans. Power Syst.

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This paper describes verification of five conjectures related to power system controlled separation. It attempts to verify that the location of uncontrolled separation (loss of synchronism or out-of-step operation) is independent of the location and severity (short-circuit duty or duration) of the initial faults, that the location depends on the prevailing network configuration and load level, and that it takes place one operation at a time (cascades). Verification of these conjectures would allow controlled separation during a disturbance in real-time, using the present communication and protection systems, and results in a minimal load and generation imbalance. Two actual power systems were used, a 50-bus system to establish the procedure for controlled separation and a 640-bus interconnection to apply the procedure. Data representing static and dynamic behavior of the two power systems were obtained from the operating utilities, and the many required simulations were conducted using EPRI Power System Analysis Package (including IPFLOW and ETMSP programs).

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Section: A 640-bus Interconnectionmentioning

confidence: 99%

On Power System Controlled Separation

Adibi¹,

Kafka²,

Maram

et al. 2006

IEEE Trans. Power Syst.

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“…Enhancement of AGC function in emergencies has been discussed conceptually in [5], where new supplemental control logic was introduced to cope with disturbance states. Augment of AGC function for islanding in abnormal conditions has also been studied in [6]. This paper will suggest a new AGC algorithm, called Emergency AGC or EAGC.…”

Section: Introductionmentioning

confidence: 99%

COI-based backstepping sliding-mode emergency frequency control for interconnected AC/DC power systems

Zhang

et al. 2009

2009 IEEE Power &Amp; Energy Society General Meeting

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A new COI-based backstepping sliding-mode method for emergency frequency control of interconnected AC/DC power systems is proposed in this paper. It aims to provide inter-area power support to the disturbed control area(s) through the intact interconnecting structure under emergency conditions, when the normal Automatic Generation Control (AGC) is suspended to avoid worsening frequency stability. With the assumption of area Center of Inertia (COI) frequency and the employment of Wide-Area Measurement System (WAMS), the control strategy is driving the area COI frequency to track the overall system COI frequency by virtue of coordination control of emergency generation and HVDC power such that the long-term frequency stability can be promisingly improved. The combined approach holds desired robustness to area load disturbances. Simulations have been conducted on a two-area interconnected AC/DC system in computer and the results demonstrate the feasibility and effectiveness of the proposed design method.Index Terms--emergency frequency control, interconnected power system, HVDC, backstepping, sliding-mode variable structure control, center of inertia (COI). stability analysis, wind power application in power systems, computational intelligence, power system optimal operation and control, EMS/DMS. Liangzhong Yao received the MSc degree in 1989 and PhD degree in 1993 all in electrical power system engineering from Tsinghua University, China. He is currently a Programme Manager for Networks, Renewables and Emerging Technologies and also a Technology Consultant and Senior Expert working in the areas of network consulting and renewable energy solutions including large wind farm grid connections at the AREVA T&D Technology Centre in Stafford, UK. Masoud Bazargan obtained his B.Sc. in Electrical Engineering in 1983 and M.Sc. in Systems Engineering in 1985 from The City University, London.Since joining the industry, he has been mainly working in the area of power system modelling and simulation. During his career, he has worked for manufacturing as well as utility and consultancy industries. He is currently the General Manager at AREVA T&D Technology Centre in Stafford, UK.

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“…After system splitting, the whole power system is under intentional islanding operation and each island of load and generation theoretically remains in balance. Thus, "although the power system is operating in an abnormal degraded state, customers are continuing to be served" [7]. The studies of historic blackouts or outages Manuscript received September 28, 2002.…”

Section: Introductionmentioning

confidence: 99%

Splitting strategies for islanding operation of large-scale power systems using OBDD-based methods

Sun

Zheng

2003

IEEE Trans. Power Syst.

255

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System splitting problem (SS problem) is to determine proper splitting points (or called splitting strategies) to split the entire interconnected transmission network into islands ensuring generation/load balance and satisfaction of transmission capacity constraints when islanding operation of system is unavoidable. For a large-scale power system, its SS problem is very complicated in general because a combinatorial explosion of strategy space happens. This paper mainly studies how to find proper splitting strategies of large-scale power systems using an OBDD-based three-phase method. Then, a time-based layered structure of the problem solving process is introduced to make this method more practical. Simulation results on IEEE 30-and 118-bus networks show that by this method, proper splitting strategies can be given quickly. Further analyses indicate that this method is effective for larger-scale power systems.Index Terms-Graph theory, islanding operation, ordered binary decision diagrams, power system protection, splitting strategies, system splitting.

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An AGC implementation for system islanding and restoration conditions

Cited by 30 publications

References 5 publications

On Power System Controlled Separation

On Power System Controlled Separation

COI-based backstepping sliding-mode emergency frequency control for interconnected AC/DC power systems

Splitting strategies for islanding operation of large-scale power systems using OBDD-based methods

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