Comparative Evaluation of Thermoelectric Decoupling Potential and Economy of Multi-type Small Capacity Thermal Power Units In Virtual Power Plant

In our country, There are various types of multi-type small capacity thermal power units in virtual power plants. To explore the potential of thermoelectric decoupling of small-scale thermal power units, this article uses different technological paths to transform multiple small-scale thermal power units for thermoelectric decoupling. While meeting the coupling conditions of small-scale thermal power units, the thermoelectric decoupling results of different small-scale thermal power units are compared and analyzed with the economics of different transformation methods, and improve the efficiency of energy management by transforming the unit. The selected case unit is used as the calculation object, and the thermal and electric parameters of the selected unit are used. The EBSILON Professional software is used for simulation and analysis, and the load space of multiple units is evaluated and compared. According to the calculation results, water-cooled back-pressure units have a larger potential for thermoelectric decoupling among different units and have obvious advantages over other units. Water-cooled back-pressure units can also obtain the maximum heat load for extraction steam heating. As the extraction steam heat load changes, the potential for thermoelectric decoupling of water-cooled condensing units changes smoothly and is the easiest to control. The heat pumps transformation methods for water-cooled condensing steam turbine units, air-cooled condensing steam turbine units and water-cooled back-pressure turbine units have the best economics.