Static voltage stability index online evaluation and correction method and system

• Main Authors: LI DEXIANG, LIANG QINGHUI, XU XIAOLIAN, DU ZHIJIAN, XIE HAIFENG
• Format: Patent
• Language: Chinese; English
• Published: 30.01.2024
• Subjects: CALCULATING; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; COMPUTER SYSTEMS BASED ON SPECIFIC COMPUTATIONAL MODELS; COMPUTING; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; COUNTING; ELECTRICITY; GENERATION; PHYSICS; SYSTEMS FOR STORING ELECTRIC ENERGY

The invention discloses a static voltage stability index online evaluation and correction method and system, and relates to the technical field of static voltage stability online evaluation of a power system. According to the technical scheme, the method comprises the steps that a system data set is obtained, and an XGBoost model is trained through the data set; the predicted data result is analyzed by using the SHAP, and the relevancy of each node feature of the power system with respect to the voltage stability L index is obtained; substituting real-time running system characteristics into the trained SHAP-XGBoost model to predict a current system voltage stability L index value, and judging whether the value is close to a critical value of system voltage stability collapse or not; if so, correcting the characteristics with relatively high system relevancy; and finally outputting a correction result. According to the method, the compiling of the static stable operation mode of the power grid after large-sca