Abstract
The design of the electrical part of the switchgear of substations is mainly carried out without taking into account the economic components and the projects in this case must comply only with regulatory documents. The exclusion of economic factors from consideration when designing switchgears for substations is also due to the lack of time for a design engineer involved in the development of large-scale project documentation and additional calculations under the conditions suitable for the end of the project execution period completely exclude the possibility of integrated accounting of all factors when choosing a switchgear circuit. The paper proposes an approach to determine some of the economic components of the costs for the design, construction, installation, commissioning and operation of switchgears for substations of 35 kV and above. The developed algorithm is adapted to the conditions of computer-aided design "ORU CAD", which allows for the development and documentation of the design of switchgear substations with the possibility of taking into account economic indicators. This article provides algorithms for calculating only economic indicators (capital investment, repair and maintenance costs) of substation switchgears. In the future, it is planned to develop an algorithm for determining the economic damage from the interruption of the power supply to external sources of load, which is powered by the designed substation, and its implementation in the specified CAD system. The developed algorithm for determining the economically viable options for the substation switchgear scheme meets the requirements of the norms and rules for the design of these power industry facilities. The results of the work are applicable as an automated workstation of the electrical engineer of a design organization.
Keywords
Computer-aided design, techno-economic justification, accounts, capital investment, supply interruption costs, escalation, objective function, optimization, discounted costs.
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