MODEL DEVELOPMENT FOR INDUSTRIAL LOADS
Powertech Labs is offering modeling services for transmission-connected industrial loads and distribution-connected loads. Developing accurate models for grid-connected loads is a key process for understanding the transient behavior of loads under various system conditions and contingencies, which is also crucial for maintaining power system reliability.
Interconnection of Industrial Loads
When industrial loads such as electric furnaces or aluminum smelters are interconnected to an electric grid, their transient and dynamic behavior can have a significant impact on grid operation, especially for a small or islanded power system. Unintended tripping of such loads can not only cause major interruption of industrial production but may also result in cascading events of the power system and lead to power outages in the interconnected system.
Grid codes or reliability standards typically stipulate technical requirements for grid-interconnected industrial loads and generators. Industrial customers are responsible for developing valid simulation models for their production facilities to be used for power system planning and operation studies. Furthermore, harmonics produced from industrial facilities should not exceed permissible limits set by the grid codes and standards, and well-designed mitigation measures, such as harmonic filters, should be installed to prevent harmonics from causing adverse power quality effects for other network users.
Model Development for Industrial Loads
Powertech performs model development for industrial loads through staged field tests or system events and has completed a number of load-modeling projects for industrial plants that utilize Electric Arc Furnaces or Aluminum Smelters (a.k.a. potlines) in production processes. Load model development typically includes the following steps:
Examine plant electrical connections and control schemes
Devise detailed plan for determining load characteristic and control performance
Execute test plan and record unit/plant responses at selected measurement points
Derive simulation models based on system configuration and control logic
Validate model parameters by simulating each test against recorded field measurements
Document details of field test and model validation results
Powertech can assist grid operators and industrial customers to meet the requirements of grid codes by conducting load interconnection studies, and field tests that develop appropriate simulation models for representing the steady-state and transient response of transmission-connected industrial loads and distribution-connected loads.
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