Abstract
For power systems with long-distance ultra-high-voltage (UHV) transmission lines, power transmission limits are often determined by static stability limits. Therefore, the assessment of stability and finding solutions to improve the stability reserve are essential for the operation of the system. This article presents an analytical approach to construct limit characteristics according to static stability conditions on a power plane. Based on the approach proposed, a program is developed and tested on a system with long-distance UHV transmission lines, showing a good performance.
Highlights
The rapid development of economies, science, and technology in the world has led to an increasing demand for energy consuming in general and electricity in particular
Power system stability is broadly classified into three categories [1]: rotor angle stability [2,3,4], frequency stability [5,6]
The remainder of this paper is organized as follows: In Section 2, a new technique for determining the permissible operating regions of power systems according to static stability limit on the power plane is represented
Summary
The rapid development of economies, science, and technology in the world has led to an increasing demand for energy consuming in general and electricity in particular. System variables based voltage stability indices are obtained by using the elements of the admittance matrix of the system and some system variables, e.g., bus voltages, power flows, etc., so they require less computational time compared to the first group. Thanks to this advantage, the second group is appropriate for online voltage stability assessment. The remainder of this paper is organized as follows: In Section 2, a new technique for determining the permissible operating regions of power systems according to static stability limit on the power plane is represented.
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