Method and device for measuring error of broadband voltage transformer error calibrator

The invention discloses a method and a device for measuring an error of an error calibrator of a broadband voltage transformer, and the method comprises the steps: connecting a measured voltage transformer, a standard voltage transformer and the error calibrator into a difference loop, measuring a first ratio error and a first phase error of the measured voltage transformer under different frequencies and different primary voltages by using an error calibrator; unfastening the wiring of the error calibrator, connecting a lock-in amplifier to the difference value loop, and measuring a second ratio error and a second phase error of the measured voltage transformer under different frequencies and different primary voltages by using the lock-in amplifier; and the mutual inductor error value measured by the lock-in amplifier is compared with the mutual inductor error value measured by the error calibrator, so that the measurement error of the error calibrator is obtained. The invention provides the method for meas