Abstract: The present invention discloses a bypass thyristor valve group inspection method and control apparatus for inspecting sub-modules in a bypass thyristor valve group, and in particular, including: dividing the bypass thyristor valve group into N sub-modules, where N is greater than or equal to 2, N is a natural number, and each sub-module is formed by connecting one or more thyristors in series; under the condition that the bypass thyristor valve group bears a normal forward voltage, sequentially triggering, by the bypass thyristor valve group control apparatus, the sub-modules according to a certain time period; detecting whether the sub-modules are capable of operating normally or not; and if not, sending an alarm signal.

Abstract: Within a predetermined time range, record time information of status indication signals fed back by thyristor control units (TCU) of a converter valve. Perform statistics and comparison of the pieces of time information using a bias statistics method. Mark a thyristor level whose bias exceeds a preset value. And determine a probability of failure in the thyristor according to the marking result.

Abstract: Within a predetermined time range, record time information of status indication signals fed back by thyristor control units (TCU) of a converter valve. Perform, statistics and comparison of the pieces of time information using a bias statistics method. Mark, a thyristor level whose bias exceeds a preset value. And determine a probability of failure in the thyristor according to the marking result.