Power plant simulation jobs upgrade#
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Power plant simulation jobs simulator#

In addition, a stimulated solution may also require specialized hardware and software to interface the process simulation to the control application software running on the DCS controllers. These modifications must be extensively evaluated.

Power plant simulation jobs simulator#

For a simulator, the DCS application software must be adapted to support simulator functions such as freeze, run, backtrack and store/restore either by adding this functionality to the DCS software itself or by adapting the DCS software to run as an application within the simulator environment. The proprietary nature of the software and hardware dictates that the modifications are available, if at all, only from the DCS vendor or its partners. Nevertheless, stimulation and emulation typically appear as external applications to the simulator environment, and as such modifications are required to be compatible with the simulator environment. This provides maximum fidelity, facilitates updating the simulator when the plant DCS software changes and is of course particularly useful if the simulator is being used as a validation tool for the DCS. Stimulation and emulation have the advantage of running the same control software (as generated by the DCS configuration tools) that runs in the DCS controllers of the actual plant. Advantages and disadvantages of each technique are they apply to DCS controls and HMI explored below as. It should also be noted that a particular project may use different techniques for different DCSs and even different techniques (a hybrid solution) for the control and HMI parts of the DCS. However, each of these techniques has advantages and disadvantages, and the right choice for a particular project will depend on a number of factors including the architecture of the DCS, the availability of a simulator-ready solution from the DCS vendor, the availability of upstream proprietary DCS data, the data delivery schedule, the cost, end-user preferences and whether the simulator is intended for engineering, training or both. On the surface, these definitions appear straightforward enough. Implementation of the reference plant DCS by simulating the DCS functionality using simulator vendor tools. In the case of DCS controls, emulation is sometimes referred to as вЂњvirtual machine,вЂќ вЂњvirtual stimulationвЂќ or вЂњvirtual controllers.вЂќ

Implementation of the reference plant DCS on the simulator using the same application software installed on the reference plant but running on the lower cost simulator hardware and operating system. Implementation of a replica of the reference plant DCS on the simulator using actual DCS hardware and application software as installed on the reference plant.

Power plant simulation jobs upgrade#

The following definitions are adapted from the IAEA publication IAEA-TECDOC-1500, Guidelines for upgrade and modernization of nuclear power plant simulators : The three techniques that are commonly used for adopting DCSs on simulators are stimulation, emulation and simulation. Buses also connect the distributed controllers to the human-machine interface (HMI) or control consoles. Computer buses connect the processor and I/O modules. field sensors) and the output modules transmit control signals calculated by the controller to actuators in the field. The input modules receive information from input instruments in the process (a.k.a. The processor receives information from input modules and sends information to output modules. Input and output (I/O) modules form component parts of the DCS. Controllers have extensive computational capabilities and in addition to proportional, integral and derivative control, can perform logic and sequential control. The following (adapted from Wikipedia) adequately describes a DCS:ДЄ DCS typically uses custom-designed processors as controllers with vendor-specific control software and uses both proprietary interconnections and communications protocols for communication. Some of these techniques are reviewed below. Through our meetings with people in the power generation industry, we have found that these techniques are not always that apparent. There are different techniques for adding DCSs to the process simulation and for ensuring that the process simulation and the DCS interact correctly.

Power plant simulation jobs full#

L-3 MAPPS has been engaged in numerous simulator projects-both modernizations and new full scope simulatorsвЂ•that require the implementation of DCSs from various vendors. Distributed control systems (DCSs), sometimes known as digital control systems, are now being applied extensively to nuclear power plant refurbishments and new plant builds.