Frequency Control System Design of Turbine Gas using Electro-Hydraulic Converter

• Published in: International journal of innovative technology and exploring engineering 2020-04, Vol.9 (6), p.620-625
• Main Authors: Hidayanti, Fitria, Sudrajat, Ajat, Warih, Gamal Fiqih Handono
• Format: Article
• Language: English
• ISSN: 2278-3075; 2278-3075
• DOI: 10.35940/ijitee.F3161.049620

In controlling the electric power system, it requires Load Control Frequency (LFC) to control load in MW and frequency (Hz) in the nominal range of 50Hz. The nominal parameter for the controller is the opening of the fuel valve, which is driven by the Electro-Hydraulic Converter (EHC). The control variable contained in the gas turbine system itself is the deviation between the setpoint and the feedback does not exceed 5% if the value exceeds the set value, it will produce a deviation, that means playing the error control. If the backup control system is active at startup, this system will result in not being able to synchronize because variable input from the network can only be controlled by frequency and active power control. It can also result in travel due to synchronous failure. If an error occurs during the operation of the backup controller load will be on, it will cause more speed or a maximum of 147 MW and of course, it will be dangerous for the gas turbine generator system. This paper will analyze the protection system from main control errors due to deviations between feedback and the setpoint set at 5% to 10% and see the system's response when there is a system change in the turbine gas. The control system design produces the largest error value at 7.2% valve opening with the control parameter Kp 12, Ti 1.9, Td 2. With simulations and data were taken through POS Simponi S+ and logic data analysis on PDDS (Programming Diagnostic Display System). The speed droop response value affects how much speed regulation is set, the smaller speed droop response value the faster the response to frequency changes and the greater speed droop response value the slower the response received by the system. In this study, the rise time value was 0.26 s and the settling time was 17.9 s.