With the development of China's economy, many large enterprises have their own self owned power plants to improve the response speed and control stability of unit speed. From the perspective of economy and other social factors, more and more enterprises choose to operate in isolated networks. This requires the DEH control system to adapt to the characteristics of isolated network operation, ensure the frequency stability of small networks, and provide stable power supply for the main production of enterprises. Based on the characteristics of isolated network operation and the advantages of LN2000 distributed control system, Luneng Control has carried out transformation and optimization on the basis of traditional DEH system, providing you with a reliable overall solution.