Method and system for evaluating voltage supporting capability of new energy power supply

• Main Authors: SU LINING, SU CHANGSHENG, GONG HAOYUE, HAN YI, ZHANG LIBO, LI XIANGHUA, JIANG YILANG, ZHANG JIAN, QIN QIN, MA LIYA, GUO JIANFENG, QIN XIAOHUI
• Format: Patent
• Language: Chinese; English
• Published: 12.05.2023
• 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; 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 method and a system for evaluating the voltage supporting capability of a new energy power supply. The method comprises the following steps: determining a system steady-state equation when the voltage of a new energy grid-connected point is solved in a steady state; determining a reactive current adjustment coefficient under a system fault condition, solving the instability voltage of the new energy grid-connected point under the system fault condition based on the reactive current adjustment coefficient and the system steady-state equation, and comparing the instability voltage of the new energy grid-connected point with a preset stable critical value voltage, and evaluating the voltage supporting capability of the new energy power supply according to a comparison result. 本发明公开了一种对新能源电源电压支撑能力进行评估的方法及系统，其中方法包括：确定求解稳态时新能源并网点电压时的系统稳态方程；确定系统故障条件下的无功电流调整系数，基于所述无功电流调整系数和所述系统稳态方程，求解系统故障条件下新能源并网点失稳电压将所述新能源并网点失稳电压与预设的稳定临界值电压进行比较，根据比较结果对新能源电源电压支撑能力进行评估。