Zero offset determination method and device, equipment and storage medium

The invention discloses a zero offset determination method and device, equipment and a storage medium, and belongs to the technical field of motor control. The method comprises the following steps: acquiring current data, working voltage and electrical angular frequency of a motor, wherein the current data comprises instruction current and/or stator current under a two-phase static coordinate system; and calculating a target reactive power based on the current data, the working voltage and the electrical angular frequency, i.e., calculating a zero offset based on the target reactive power. The current data, the working voltage and the electrical angular frequency are all known variables, so that the variables can be obtained without additionally injecting high-frequency signals, and the variables are not influenced by the signal-to-noise ratio, and are not limited by a low-speed working condition. Therefore, the problem of zero offset can be simply solved by calibrating the position of the rotor based on the