Inertial, Governor, and AGC/Economic Dispatch Load Flow Simulations of Loss of Generation Contingencies

Lotfalian,; Schlueter,; Idizior,; Rusche,; Tedeschi,; Shu,; Yazdankhah,

doi:10.1109/mper.1985.5528355

Cited by 5 publications

(6 citation statements)

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“…The formulation (10,11) is similar to that of a "distributed slack-bus" or "governor power flow" model (e.g. [6]). When z changes, so does ω, since it is an algebraic variable.…”

Section: A Qss Model Without Frequency Dynamicsmentioning

confidence: 99%

Quasi steady-state models for long-term voltage and frequency dynamics simulation

Grenier

Lefebvre

Cutsem

2005

2005 IEEE Russia Power Tech

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Abstract-The Quasi Steady-State (QSS) approximation of long-term dynamics relies on time-scale decomposition and consists of replacing faster phenomena by their equilibrium conditions, in order to reduce the complexity of the whole model and increase the computation efficiency of time simulations. This paper describes the extension of a QSS model extensively used in long-term voltage stability studies, to readily incorporate the frequency dynamics that takes place over the same time scale. This extended QSS model relies on a common-frequency assumption. Its advantages, limitations and possible improvements are discussed through simulation results on the Hydro-Québec system, where it has been compared to full time scale simulations. Disturbances with an impact on either frequency or voltages are considered and the coupling between these two aspects of longterm dynamics is briefly discussed.

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“…The formulation (10,11) is similar to that of a "distributed slack-bus" or "governor power flow" model (e.g. [6]). When z changes, so does ω, since it is an algebraic variable.…”

Section: A Qss Model Without Frequency Dynamicsmentioning

confidence: 99%

Quasi steady-state models for long-term voltage and frequency dynamics simulation

Grenier

Lefebvre

Cutsem

2005

2005 IEEE Russia Power Tech

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“…A great number of interior parameters of dynamic components are needed, such as synchronous reactance of generator, transient reactance, and time constant and gain of exciter and governor. Particularly, literature 15,16 study the static characteristic of steady state under the control of generator and propose a PF model involving the static characteristic of generator. The algorithm requires only for the regulation coefficient of governor, but no further research has been carried out to the effect of governor nonlinearity.…”

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confidence: 99%

Solution of dynamic power flow technique considering governor nonlinearity

Fan¹,

Chen²,

Wang

et al. 2019

Int Trans Electr Energ Syst

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Summary An improved dynamic power flow (DPF) model considering governor nonlinearity is presented. The proposed DPF model is intended for the analysis of post‐contingency power flow after primary frequency regulation. During the regulation process, the governors play an important role while it is difficult to involve the nonlinear segments in the static method. So in this paper, the governor model with amplitude‐limit and deadband is simplified and included in DPF model. Using the describing function method, the effect of deadband is equivalent to an increment of regulation coefficient. The amplitude‐limit is handled by iterative correction. Applying the algorithm to a three‐node system, a case study of load variation proves the effectiveness of the algorithm. Simulations on a practical grid in southern China further demonstrates the practicability and applicability. The algorithm enhances the accuracy of post‐contingency power flow analysis and provides effective analysis for the static security of power system.

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“…To be able to model the power system more realistically especially after a generation contingency, the governor power flow option is integrated into VCMARGIN. The governor power flow formulation uses a distributed slack scheme as described in [15,16]. It takes into account all the active power available by using the participation factors of the generators to account for the system losses, p. The new unknown variable, p, is added to the state vector, i.e., x = /QT,VT, plT, and the power flow Jacobian, I, in Eq.…”

Section: I "mentioning

confidence: 99%

“…It takes into account all the active power available by using the participation factors of the generators to account for the system losses, p. The new unknown variable, p, is added to the state vector, i.e., x = /QT,VT, plT, and the power flow Jacobian, I, in Eq. (5) is augmented by one column which contains the participation factors, i.e., the normalized frequency response characteristics of the generators [15].…”

Section: I "mentioning

confidence: 99%

Voltage Collapse Operating Margin Analysis Using Sensitivity Techniques

Rajagopalan¹,

Hao²,

Shirmohammadi³

et al.

Proceedings. Joint International Power Conference Athens Power Tech,

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In this paper, we describe the basic formulation, voltage collapse and plan operations under such implementation and application of a computer model, conditions, PG&E has developed a computer called VCMARGIN, for determining the s teady-state model called VCMARGIN (Voltage Collapse Operating operating margin of a potver system based on voltage Margin Calculation Program). stability considerations. The determination of the operating margin is based on the evaluation of the The steady-state voltage stability margin at an operating proximity of the current operating point of a power point of a power system is determined by measuring its system to the voltage collapse point. This proximity is distance from the critical point (nose point) on the calculated by tracing the path of the current operating voltage vs. activelreactive power (V-P/Q) curve. The point a s one or more system parameters vary.critical point is traditionally estimated by running Parameters under consideration include bus and area standard power flow programs repeatedly at various loads, line impedances and real/reactive generations. load levels. As the loading in the system increases, the VCMARGIN uses a continuation technique for power power flow Jacobian becomes numerically illflow, optimal power flow and governor power flow to conditioned and the solution diverges. As a result, the perform the determination of the operating margin very exact knowledge of the critical point through efficiently. VCMARGIN is extensively used by IJG&E's conventional power flow analysis is not always possible. operations planners for developing short-term operating plans for secure an mal use of PG&E's generation The rising interest in voltage collapse has focused and transmission attention on the behavior of power systems at critical load levels. Several authors on this subject have tried to Keywords: Steady-State Voltage Stability Analysis, explain the problem in terms of the singularity Voltage Collapse, Continuation Methods. phenomenon of the power flow Jacobian, multiple load flow solutions and the static bifurcation theory [2]-[10].

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Inertial, Governor, and AGC/Economic Dispatch Load Flow Simulations of Loss of Generation Contingencies

Cited by 5 publications

References 0 publications

Quasi steady-state models for long-term voltage and frequency dynamics simulation

Quasi steady-state models for long-term voltage and frequency dynamics simulation

Solution of dynamic power flow technique considering governor nonlinearity

Voltage Collapse Operating Margin Analysis Using Sensitivity Techniques

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