– In gas turbine system, Governor controller plays an important role in the dynamic behavior of turbine system for automatically regulating the supply of fuel with respect to load and although to limiting the speed. This makes adaptive tuning of PI Controller in different plant parameters and disturbances. The tuning methods selected were Ziegler-Nichols method, Astrom-Hagglund method, Tsang-Rad method and Fruehauf tuning rules were applied for PI (Proportional Integral)tuning. This work involves design of algorithm to choose a suitable tuning method for different plant characteristics and then to tune controller parameters effectively. This paper aims to reduce these real time disturbances that effect the pH value and prevent pH operating point in the neutral region. Also there should be detection and correction of non-linear characteristics and disturbances such as temperature variations that occur in real time plant scenario. Effective treatment of waste water is very essential in industries due to their harmful is essential to maintain pH in neutral region as per titration curve indication of strong acids which shows a small change in input, gives huge change in output in the range 6-8 pH value.
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