Optimization for Biogas Power Plants using Automatic Control of Gas Pressures
In many cases, gas storages on biogas power plants are not used optimally to store gas as much as their capacity. The digester is sometimes overload to store gas and the controller cannot deliver gas to other storage. Consequently, gas is often released from digester to avoid over pressure. At the end, biogas power plant has less efficiency. Hence, a mechanism to control gas pressure to make different pressure between its storages is required. Fans were used to manipulate the most majority system pressures on a biogas power plant using frequency converters. Measurements, simulations, and experiments were conducted to create a new system on a biogas power plant. A controller, Programmable Logic Controller was used to control the entire system pressure using Proportional-Integral-Derivative algorithm. When the gas pressures are not in the allowable range of pressure, then the controller changes the fans’ frequency to the desired conditions. As a result, gas moves to another storage and system pressures are in the allowable range.
Development of PLC based monitoring and control of pressure in Biogas Power Plant Digester
this paper presents Programmable Logic Controller (PLC) based control and regulation of various parameters of the digester of a biogas plant for its safety. The work consists of a complete engineering approach through identification of problems, modeling of the system, designing of the control solution, implementation and the discussion of results. This paper also shows a PLC based mechanism to control gas pressure in the digester by the transfer of gas to post digester storage to avoid the unnecessary release of gas into atmosphere, which leads to plant inefficiency and environmental pollution. The model, representing pressure, temperature, humidity and flow control is simulated in FluidSim and Wonderware Intouch software for analysis purpose and the solution is verified using Mirologix400 software and therefor, implemented using Factory Talk View and RsLogix5000 software.
Hardware-in-the-Loop Simulation for Control Development in EHPV Applications
The creation of a PC-based Hardware-In-the-Loop Simulation facility for testing hydraulic and other drive components and their controllers is described. High performance electric motors are used to produce both drive and load characteristics as commanded by the simulated environment. To enable rapid development of new application scenarios an integrated software environment has been incorporated to rapidly model, program and simulate the environment’s behavior and the controlled response. In order to validate the HIL testbed developed, the experiment is performed on hydraulic component with wide range of applications. For the next stage, a novel Electroi Hydraulic Popper Valve (EHPV) is targeted to be studied.Copyright © 2003 by ASME