In the context of current energy structure transformation

conventional thermal power would gradually transform into grid source support and system regulation. Coupling with distributed photovoltaic power is an effective attempt for thermal power enterprises to achieve cost reduction and efficiency improvement. However

due to the lack of relevant guidance for the connection of non centralized power sources for the factory use

there is a lack of evaluation strategies and empirical references for system security and stability. For this purpose

taking the thermal photovoltaic complementary energy supply system of a thermal power plant in northwest China as an example

its operating characteristics are analyzed and a technical framework for stability evaluation is provided.In examples of different power units

grid connection levels

and minimum photovoltaic unit layout

application evaluation issues such as static power flow

transient stability

and power quality are discussed. It is calculated that the power consumption reduction efficiency of thermal power units in this case achieves an improvement of 18%～42%. This conclusion has typical reference significance for the application of the power generation technology model of “distributed photovoltaic access to plant use systems” in thermal power plants.