New energy system broadband harmonic degradation stratified analysis and traceability method

• Main Authors: YANG DONGDONG, LI ZHILI, GAO GUANLONG, WANG PENG, XU MINGMING, WU DONG, LI FENGJUN, LI XIANGQIAN, LIN MAOSHENG, MENG QINGCHANG, ZHANG JIANBIN
• Format: Patent
• Language: Chinese; English
• Published: 22.08.2023
• Subjects: CALCULATING; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; COMPUTING; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; COUNTING; DATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FORADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORYOR FORECASTING PURPOSES; ELECTRIC DIGITAL DATA PROCESSING; ELECTRICITY; GENERATION; PHYSICS; SYSTEMS FOR STORING ELECTRIC ENERGY; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE,COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTINGPURPOSES, NOT OTHERWISE PROVIDED FOR

The invention discloses a stratified analysis and traceability method for broadband harmonic degradation of a new energy system. The method comprises the following steps: 1, establishing a system node admittance matrix according to equivalent admittance of new energy equipment and a power grid, and calculating to obtain a system modal; 2, based on the system modality obtained in the step 1, calculating damping and natural resonant frequency corresponding to the modality to carry out oscillation analysis and resonance analysis, and judging whether the system oscillates or resonates; and step 3, according to an analysis result of the step 2, dividing three parts of nodes, admittance and system parameters, calculating a participation degree through a participation factor, and tracing a degradation source which causes broadband harmonic waves to appear in the new energy system. The new energy system broadband harmonic degradation stratified analysis and traceability method disclosed by the invention can provide m