Method and device for determining bearable minimum inertia of power grid

• Main Authors: CHEN YONG, FENG JING, XU PENGFEI, FU WENHUA, YANG GANG, MA SHIYING, GUO QIANG, XUE ZHIWEI, HAN HAI'AN, YANG XUETAO, MENG TAO, XIE JIAZHENG, LIU KAIXIN, LIU TAO, ZHAO GAOSHANG, WU GUOYANG, ZHANG JUNLIU, YANG HONGYING, TANG ZHEN, SU ZHIDA, DU SAN'EN, PAN JIE, SONG DUNWEN, LIU DAOWEI, HAO LIHUA, TAO WENBIAO
• Format: Patent
• Language: Chinese; English
• Published: 24.03.2023
• Subjects: CALCULATING; COMPUTING; COUNTING; DATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FORADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORYOR FORECASTING PURPOSES; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE,COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTINGPURPOSES, NOT OTHERWISE PROVIDED FOR

The invention discloses a method for determining the bearable minimum inertia of a power grid. The method comprises the following steps: determining transient frequency response models of all synchronous generators in the power grid; acquiring a transfer function of transient frequency response of the power grid according to the transient frequency response model; establishing a power grid power response equation according to the transfer function; obtaining the pole frequency of the power grid frequency by solving the power grid power response equation; and determining the bearable minimum inertia of the power grid according to the limit disturbance quantity specified by the power grid and the pole frequency. Theoretical guidance is provided for high-proportion power system frequency stability, and the safety risk of power grid operation is reduced. 本发明公开了一种用于确定电网可承受的最小惯量的方法，包括：确定电网中所有同步发电机的暂态频率响应模型；根据所述暂态频率响应模型，获取电网暂态频率响应的传递函数；根据所述传递函数，建立电网功率响应方程；通过求解所述电网功率响应方程，获取电网频率的极点频率；根据电网规定的极限扰动量和所述极点频率，确定电网可承受的最小惯量。为