MODEL OF AUTOMATED HARDWARE DIAGNOSTICS OF REMOTE ENERGY SYSTEMS MANAGEMENT POINTS
Journal Title: Світлотехніка та електроенергетика - Year 2017, Vol 3, Issue
Abstract
In power and gas supply systems, special local control and regulation systems are widely used at remote sites, for example, in transformer substations, gas distribution points, energy consumption accounting points, etc. An important task in the construction of automatic control (regulation) systems is to ensure the reliability of their operation, which is impossible without the use of automatic systems of technical diagnosis. At designing of modern systems of technical diagnosing computer technologies of the automated designing with application of hardware description languages and modern technological base are widely used. This approach will make it possible to implement a system for diagnosing a remote control point of any energy system without human intervention and without disabling the main control system for a long time. The paper presents a method for computer-aided design of a digital device for local control (regulation) in electric power and gas supply. As an example, the control loop of an automatic gas distribution station has been selected. Based on the simplified algorithm for the functioning of the AGDS represented by ASM chart, an state mahine model is constructed in the form of a transition graph of a finite state mahine Mealy. The transition graph is represented in the VHDL hardware description language in the form of a dual-processor state mahine template. The transition graph is used to construct the algorithm for diagnosing the control device by the strategy of bypassing all arcs of the graph, which guarantees its completeness. Based on the diagnostic algorithm, a VHDL model of the hardware diagnostic tool is built. Verification of the model of the developed diagnostic device is performed using simulation system Active-HDL. Synthesis of the control device and the diagnostic device using CAD tool XILINX ISE is performed. The results of the synthesis showed that the hardware costs for control and diagnostic devices are comparable. Further areas of research may be related to the automation of the construction of the diagnostic algorithm by tools of Active-HDL and the creation of a full cycle of automated design of control and diagnostic devices, as well as the reduction of hardware costs through the use of test design methods and built-in diagnostics. Scientific novelty of the work consists in the further development of methods for computer-aided design of diagnostic hardware on the basis of the analysis of the control device functioning algorithm presented in the hardware description language, which made it possible to organize a joint design of the control and diagnostic device. The practical value of the results obtained is the development of procedures for the automated design of diagnostic hardware based on the template HDL models of diagnostic machines. These template HDL-models can be used in the automated design of diagnostic devices, preparation and conduct of diagnostic experiments for any control devices whose functioning algorithm is represented in the form of ASM chart.
Authors and Affiliations
Юрій Пахомов, Маріна Мірошник
Keywords
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