Dynamic load modeling for industrial facilities using template and PSS/E composite load model structure CLOD

Abstract

Industrial facility loads have significant impact on power system stability. Due to their large power demand and complicated impact on system dynamic performance, it is critical to model them properly. Because the knowledge of industry-specific load composition data are limited, load model accuracy of the current utility practice is greatly compromised. In this paper, a new dynamic load modeling method is proposed by combining a template of a specific type of industrial facilities and the composite load model structure (CLOD) in the commercial software PSS/E. This method is relatively easier to implement in PSS/E and can still achieve reasonable accuracy. The proposed method consists of three steps: 1) create a template by conducting an in-depth load survey for a specific type of industrial facilities; 2) determine load composition of the facility that is required by PSS/E CLOD load model structure using the template; 3) create a PSS/E CLOD load model of the facility using the load composition data. To validate the proposed method, a case study and a sensitivity study are conducted using a real 110-megawatt (MW) Kraft paper mill facility. The case study verifies the accuracy of the proposed model by comparing simulation results with actual field measurements of the 110 MW Kraft paper mill facility; the sensitivity study shows the robustness of the proposed modeling method when subjected to load parameters variation. The proposed method can serve as a generic method for dynamic load modeling of any type of industrial facilities.