Eigenvalue and frequency-domain analysis of the intermountain power project and the wscc network
The Western Systems Coordinating Council (WSCC) has several interarea modes of oscillation in the range of 0.3 to 0.8 Hz. The results of an investigation of how various network parameters and operating conditions affect the stability of those modes are presented. Eigenvalue and frequency-domain techniques are used. The study results show that numerous system parameters can have a significant impact on overall network stability. These parameters can include control settings, such as those in HVDC systems or power system stabilizers, or operational parameters, such as scheduled tie-line flows. The results show that careful analysis and tuning of all significant controls in a large network are necessary to ensure overall system stability and satisfactory performance. >
Development and application of a comprehensive small signal stability package embedded in an automatic disturbance analysis multi-agent system
This work presents a case of integration of a small signal stability simulation algorithm in an Automatic Disturbance Analysis software. The small signal stability simulation algorithm is presented in a step by step solution of a chosen case. The algorithm is available for free download1, in order to allow others engineers to reproduce the results and to discuss the developed code. The algorithm was validated using benchmark software, integrated to a multi-agent system for automatic disturbance analysis. The algorithm performance was tested using disturbance cases, which presented satisfying results.
Distance Measures and Coherency Recognition for Transient Stability Equivalents
Existing methods for transient stability equivalents all lack a means of drawing a consistent boundary between the equivalized area and the area represented in detail. In most methods, it is assumed that the generators equivalized are coherent. However, no simple method to identify them has been offered, which does not require a transient stability study of the entire system. A method using distance measures to draw boundaries and pattern recognition concepts to identify coherency is presented. Computation required is minimal. The method is incorporated in a computer program which is a useful tool for transient stability studies in power system planning.