Analysis and Evaluation of Frequency Stability Characteristics of New Energy Power System Based on Key Response Characteristics
The high proportion of new energy grid connection leads to the reduction of power system inertia and the more complex spatial and temporal distribution characteristics of power grid frequency.It is urgent to clarify the frequency stability discrimination of power grid in new scenarios.In order to examine the frequency characteristics and frequency stability discrimination in the new scene,firstly,through the analysis of the new scene characteristics,the variables that can reflect the frequency time series characteristics are selected.After Pearson correlation analysis and feature hierarchical clustering dimension reduction,the feature quantities that are strongly correlated with the frequency and easy to measure are selected as the key response feature quantities.Through the correlation curve of its response characteristics with the frequency,the frequency is studied with the change of its feature quantities in the system stability and instability state,and the frequency criterion is constructed.The criterion can identify the fault unit while judging the stability.Finally,the effectiveness of the method is verified by an actual power grid example.
new energykey characteristic quantityresponse characteristic curvefrequency stabilization
万方数据
维普
