Flow state evaluation method for power grid with UPFC based on standardized Euclidean distance

The invention discloses a flow state evaluation method for a power grid with a UPFC based on standardized Euclidean distance. The flow state evaluation method is characterized by comprising the following steps that step one, a power grid flow optimization model considering the UPFC is established; step two, standardization processing is performed on load rate data of each line according to the optimal flow calculation result; step three, standardization processing is performed on the line load rate data under the working condition in view of a certain operation working condition to be evaluated; and step four, Euclidean distance between the working condition to the evaluated and the ideal optimal working condition is calculated, and the calculation result acts as the flow state evolution indicator under the working condition. An optimization objective is formulated from the two angles of line load balancing degree and line loss, the flow state evolution indicator is defined as the standardized Euclidean distance between the actual flow and the ideal flow, and finally different operation modes are evaluated according to the size of the indicator value.