Power System Steady-state Stability Criteria and the Jacobian of Dynamical Systems

Coupled with the power system through power-electronic interfaces, renewable energies including wind power and photovoltaic can control the power quickly and flexibly. In the steady-state stability analysis, by neglecting the fast dynamics of power-electronic interfaces, the renewable energy power is simplified to a static power injection model and can be described as an algebraic equation in the dynamic process. Based on this simplified model, the steady-state stability of sending-end system with mixed synchronous generator and power-electronic-interfaced renewable energy is studied. By proposing a triangular transformation model based on the classical model of power system, the steady-state stability analysis becomes feasible. The mechanism of steady-state stability is revealed, and the influence of renewable energy on the steady-state stability limit is quantitatively investigated. When the renewable energy power increases, the steady-state stability limit of the sending-end system first increases and then decreases. Reducing the power output of synchronous generator can change for a higher integration limit of renewable energy. Simulation results validate the conclusion.

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Assessment of steady state stability of a multi-machine power system with and without a superconducting machine

IEEE Transactions on Power Systems ◽

10.1109/59.65899 ◽

1990 ◽

Vol 5 (3) ◽

pp. 730-736 ◽

Cited By ~ 6

Author(s):

M.A.A. Alyan ◽

Y.H.A. Rahim ◽

S.M. Osheba

Keyword(s):

Steady State ◽

Power System ◽

Steady State Stability

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Steady state stability in electrical power systems considering operation limits in generators, transformers and transmission lines

ITECKNE Innovación e Investigación en Ingeniería ◽

10.15332/iteckne.v18i2.2599 ◽

2021 ◽

Vol 18 (2) ◽

Author(s):

Fredy Estuardo Tamayo Guzmán ◽

Carlos Andrés Barrera-Singaña

Keyword(s):

Steady State ◽

Power Systems ◽

Power System ◽

Transmission Lines ◽

Electrical Power ◽

Operating Conditions ◽

Electrical Power Systems ◽

Capacity Curves ◽

Remedial Actions ◽

Steady State Stability

Electrical power systems are exposed to several events that can cause unstable operation scenarios. This is due to improper operation of certain components. If an event occurs, the system must be designed to overcome that contingency, thus remaining in a permanent condition that must be evaluated in order to monitor and prevent a possible collapse of the system. An evaluation of steady state stability is proposed at this work based on the capacity curves of generators, transformers and transmission lines. These remarked curves provide information on the operation point of these elements, thus allowing the application of remedial actions. PowerFactory and Matlab are used to carry out the tool for monitoring the operation points after a contingency. The effectiveness of the developed tool is validated at the IEEE 39-bus power system model, where results shows that the functionalaty for different contingencies based on the operating conditions when the components of the power system are varied, cosnquently, the tool identifies cases that require actions at the operational level.

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