Improving the efficiency of emergency control systems for future-oriented connection of sources of distributed generation

Abstract

Improvement of energy-intensive technological processes of industrial enterprises requires increasing the reliability and efficiency of power supply of consumers. In this regard, one of the priority areas associated with introduction of the sources of distributed generation is mainstreamed in energy industry. This trend has both beneficial and negative impacts. It makes difficult to control normal, emergency, and post-emergency modes of power supply systems of enterprises of ferrous metallurgy. When new sources of distributed generation are introduced under the conditions of complex closed-loop power supply system, it is necessary to assess the level of short-circuit currents to check the electrical equipment and residual voltages across the busbars of the consumers of ferrous metallurgy. Also, it is necessary to determine the critical time of generators dropping and evaluate the stability in case of isolated operation. An algorithm has been developed for automated search of a dividing point in case of an emergency and isolated operation depending on the power balance to maintain stability. It is based on a combination of the method of successive network reduction and step-by-step method. To improve the reliability of essential consumers, the authors have developed an algorithm for automatic search for the dividing point during operation of emergency control system depending on the power balance to maintain stability. The authors have developed proprietary software to assess the effectiveness of emergency automation equipment of multi-level complex closed-loop power supply system of metallurgical enterprise. Performed calculations and analysis of emergency and post-emergency modes are designed to develop a comprehensive approach of a set of measures to ensure the reliability and stability of essential consumers in the mode of automatic search.