Control of hopf bifurcation in power systems via a generation redispatch

Lerm, A.A.P.

doi:10.1109/ptc.2001.964754

Cited by 7 publications

(4 citation statements)

References 9 publications

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“…HOPF SENSITIVITY CALCULATIONS [9], [20], [21] The power system model for the envisioned studies is of the form (1) where , and are the dynamic state variable, algebraic variable, and parameter vectors, respectively. and ( and ) represent the differential and algebraic equations, respectively.…”

Section: Study Systems and System Modelmentioning

confidence: 99%

“…This is in contrast to prior methods [5], [9]- [13], which rely on direct control of the generators. The proposed approach allows for a more rapid response to real-time events, such as line outages, since the generators automatically redispatch based on their active and reactive power controllers.…”

Section: Introductionmentioning

confidence: 97%

“…The studies are based on 1) voltage control of synchronous machines [4], [5]; 2) reactive power control [5]- [8]; 3) active power control [5], [9]- [11]; and 4) imposition of stability constraints associated with the Hopf bifurcation to the conventional optimal power-flow (OPF) problem [12], [13]. None of the reported strategies use the HVDC setpoints adjustment to achieve stability improvements.…”

Section: Introductionmentioning

confidence: 99%

“…Methods based on active power control (generation redispatch) may not be used for real-time applications, since most generators are not on automatic generation control (AGC) and can take several minutes to respond to redispatch instructions [14]. Furthermore, the reported methods of [5], [9]- [11] require positive and negative sensitivities, which are not always available, to ensure that active and reactive power balance is maintained. Fig.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Dynamic Stability Enhancement of a DC-Segmented AC Power System Via HVDC Operating-Point Adjustment

Azad

Iravani

Tate

2015

IEEE Trans. Power Delivery

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Hopf bifurcation phenomenon of a power system results in oscillatory dynamics which can lead to instabilities in the system. Therefore, it is desirable to operate the system such that a sufficient margin to Hopf bifurcation is ensured. This paper presents a methodology based on the adjustment of the setpoint values of the HVDC link controllers, to prevent instability or increase the stability margin of the system subject to Hopf bifurcation. In this paper, the first-order sensitivities of the Hopf stability margin to the setpoint values of the HVDC links are presented. These sensitivities identify the optimum direction to change the HVDC setpoints to steer the system away from instability, increase the stability margin, and improve the damping of oscillatory modes. The proposed method is evaluated on various system configurations subject to Hopf bifurcation phenomena caused by a variety of events, such as load and line impedance variations. Simulation results show that at the optimum operating point, for a variety of Hopf bifurcations, the stability margin and damping of the oscillatory modes improve.Index Terms-HVDC transmission control, power system control, power system dynamic stability.

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