Dynamic security regions of power systems

Kaye, R.J.; Wu, F.F.

doi:10.1109/tcs.1982.1085203

Cited by 82 publications

(26 citation statements)

References 16 publications

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“…Once the fault is cleared, the system is henceforth governed by a post-fault dynamics described by the following differential equation (9). The initial condition of the post-fault system is the state of the fault-on system at the time of fault clearing, …”

Section: Dynamic Security Regionmentioning

confidence: 99%

“…Meanwhile, in power system analysis, the concept of dynamic security region [9,10] is being recognized more and more [11 19] . Dynamic security region (DSR) is a region in the space of control variables u in which the system is transiently stable to a given fault.…”

Section: Introductionmentioning

confidence: 99%

“…Dynamic security region (DSR) is a region in the space of control variables u in which the system is transiently stable to a given fault. Since the original introduction of DSR [9,10] , a series of modifications and enhancements have been done to perfect the theoretical foundation and develop practical computation algorithm [11 15] . Furthermore, DSR has been applied to power system analysis such as stability-constrained optimal power flow [16,17] , transient stability assessment and control [18,19] , etc.…”

Section: Introductionmentioning

confidence: 99%

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A new transient stability margin based on dynamic security region and its applications

Xue

Mei

2008

Sci. China Ser. E-Technol. Sci.

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A new transient stability margin is proposed based on a new expression of dynamic security region (DSR) which is developed from the existing expression of DSR.Applications of the DSR based transient stability margin to contingency ranking and screening are discussed. Simulations in the 10-machine 39-bus New England system are performed to show the effectiveness of the proposed DSR based transient stability margin.dynamic security region (DSR), transient stability margin, contingency screening

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Section: Dynamic Security Regionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A new transient stability margin based on dynamic security region and its applications

Xue

Mei

2008

Sci. China Ser. E-Technol. Sci.

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“…A formal characterization of security was presented by Galiana [14]. The incorporation of dynamics in the formation of security regions was described by Wu and Kaye [22,31].…”

Section: Dennis Ray Rodney Stevenson Eileen Cashman Membermentioning

confidence: 99%

Engineering foundations for the determination of security costs

Alvarado

Ray

et al. 1991

IEEE Trans. Power Syst.

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This paper characterizes system security by using distances to system operational limits (including voltage collapse limits, stability limits, line and transformer overloads, and generator limits). It. uses the Point of Collapse method based on the singularity of the power flow Jacobian to define an Operational Limit Boundary in load demand space. Distances to this boundary are then translated into probabilistic measures of likelihood of system failure: Probability of Normal Status, Expected Demand Not Served, Expected Unserved Energy and, ultimately, Expected Outage Cost. Sensitivities of these measures to load and generation changes (important for operational decisions and real-time pricing) are also described. A numerical example is presented. Computational issues are discussed. eywords: Sestability.curity, adequacy, outage costs, loadability, vo + tage collapse, I n t r o d u c t i o nThis paper establishes foundations for the determination of the expected costs resulting from system outages. Outages refer to the inability of the system to supply part or all of the system load, not to equipment outages. The paper uses primarily static system security (system adequacy) concepts to separate regions of normal operation from regions where outages occur."Outage costs" are not normally in the vocabulary of power engineers. Systems have traditionally been operated on the basis of "economic dispatch"' sabject to "security constraints." The constraints typically assume that secure operation is of the utmost importance, overriding cost considerations. However, as systems become more strained and as the responsibility for system operation becomes increasingly diversified, knowledge of the limits of secure operation becomes more important. The very idea of a system that is either "secure" or "insecure" comes into question. Systems have varying degrees of security. Absolute security can never be attained.All decisions about a system influence security to some 91 FE1 183-L PidRS A paper r e c o m e d e c ? and approved by t h e I E Z Porrer Systen Engineering Comnittee of t h e IEEZ Porrer Engineering S o c i e t y f o r p r e s e n t a t i o n a t t h e IE;E/PCS 1991 Winter I.leeting, Keir York, New York, r e b r u a r y 3-7, 1991 . !'anuscri?t s u b n i i t t e dSeptember 5, 1990; made a v a i l a u l e for p r i n t i n ;J a n u a r y 22, 1991.Dennis Ray Rodney Stevenson Eileen Cashman Member Non-member Non-member G r a d u a t e School of Business T h e University of Wisconsin -Madison degree. Security is a function of configuration and operating condition. Often, security is expressed as a function of a single variable (such as total load or transfer capability between two areas). More likely, it is expressed as a constraint on this variable. This can be done because security is highly nonlinear. When the system is secure, most actions have negligible impact on security. However, when security is in jeopardy, many actions can have a significant effect on security. Thus, while at times security can be ignored,...

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“…The simple mapping information can in turn be used in a preventive control formulation [15]. Other attempts to solve this preventive control problem can be found in, for example, references [4,16,17,18].…”

Section: Introductionmentioning

confidence: 99%

Transient stability-constrained optimal power flow

Bettiol

Ruiz-Vega

Ernst

et al.

PowerTech Budapest 99. Abstract Records. (Cat. No.99EX376)

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Stability is an important constraint in power system operation. Often trial and error heuristics are used that can be costly and imprecise. A new methodology that eliminates the need for repeated simulation to determine a transiently secure operating point is presented. The methodology involves a stability constrained Optimal Power Flow (OPF). The theoretical development is straightforward: swing equations are converted to numerically equivalent algebraic equations and then integrated into a standard OPF formulation. In this way standard nonlinear programming techniques can be applied to the problem.

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Dynamic security regions of power systems

Cited by 82 publications

References 16 publications

A new transient stability margin based on dynamic security region and its applications

A new transient stability margin based on dynamic security region and its applications

Engineering foundations for the determination of security costs

Transient stability-constrained optimal power flow

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