For a long time, micro-grid has emphasized more distributed characteristics. Whether it is connected to a large power grid or not, self-management and self-control are its typical characteristics. Regardless of the definition, the microgrid is still inseparable from the attributes of its power grid, and it must also comply with some golden rules in power grid design. Among them, safety and stability are undoubtedly the most important standards. In order to ensure safety while accessing a high proportion of distributed renewable energy, the most important thing is the flexibility of the system.

Under the framework of flexibility, the definition and development trend of microgrid in various countries are also slightly different. In July, my country issued the "Trial Measures for Promoting the Construction of Grid-connected Microgrid", which gave the official definition of microgrid. . Today we are introducing a series of development trends in the construction of microgrids in the United States. The core of which is the cogeneration equipment system. The coupling of heat and power on the consumer side and the decoupling of the production side will easily solve a series of flexible microgrids. Sexual issues.

 

 

2. Cogeneration, multi-energy complementary Cogeneration, as its name suggests, is an energy production method that simultaneously produces heat and electricity. The waste heat in the power generation process is reused and heated, domestic hot water, industrial heating and even converted into cold energy through absorption refrigeration equipment. This coupled energy production method can increase the energy efficiency utilization rate to 80%, and the same fuel is used to produce electricity and heat separately at a maximum efficiency of 45%. At present, as the miniaturization technology of gas turbines has matured, high-efficiency cogeneration equipment can also become the core component of distributed energy supply.