Output error identification of hydrogenerator conduit dynamics

Two output error model reference adaptive identifiers are considered for estimating the parameters in a reduced-order gate position to pressure model for the hydrogenerator. Gradient and sensitivity function identifiers are discussed for hydroelectric applications, and connections are made between their structural differences and relative performance. Simulations are presented to support the conclusion that the latter algorithm is more robust, having better disturbance rejections and less plant model mismatch sensitivity. For identification from recorded plant data from step gate inputs, the other algorithm fails to converge. A method of checking the estimated parameters is developed by relating the coefficients in the reduced-order model to head, an externally measurable parameter