This paper presents the incorporation of a residential alarm system into a low cost industrial integrated security system able to secure and control electric supply installations used to power vital industrial consumers such as hospitals, HVAC (heating, ventilation and air conditioning), safety lighting, security locks of gates and doors or, why not, police precincts and fire departments. The proposed adapted alarm system is designed to exceed the functions of a basic residential security system. The new feature of this modified alarm system consists in its capability to monitor and report the electric faults occurring in the power grid of vital consumers to a cell phone or tablet. Their electric power supply drawn from independent sources of electricity connected to the national power system in distinctive points or from dedicated emergency electric sources (dedicated power generators). The presented alarm system consists of the following components: system simulation platform of the functioning of the automatic transfer switch, residential alarm panel and keypad, communication module. The electric power supply of the vital consumers implies an automatic transfer switch (ATS) that, upon the disconnection resulted due to a defect, switches the vital consumers' connection to another power source. The automatic transfer switch may be rapid or on a preset timer. When the ATS is triggered in the rapid response mode, as a result of a fault in the electric network, the transfer is performed only if the main source has been disconnected and the electric power reserve has the minimum value of the permissible operating voltage. The timed ATS transfer is performed when the main source voltage level drops below a certain preset value called threshold voltage.
This paper presents the practical implementation of the educational platform necessary to study the maneuvers of the protective and switching equipment located in a medium or high voltage substation. The "maneuver" concept describes a set of operations used to change the state of different pieces of equipment, their operation regime or modify the electrical connections matrix in the system. The maneuvers can be executed either locally, from the main control panel of the platform by means of command keys or can be triggered remotely. The mode of command input (local or remote) is set by the regimes key. Changes in the state of different pieces of electrical equipment are cross-conditioned by the circuit diagram of the electrical station. The state of the devices is displayed in accordance with information received from the interface relays or the PLC interface. This educational platform contributes to a better understanding of the types of maneuvers and of the connections between multiple interacting pieces of electrical equipment in a power station. The automated distribution systems allow for the rapid and safe reconfiguration of the power feed. The maneuver simulating methods described in this paper can be used to verify the synoptic panels located in substations. Knowledge on how to construct these panels and on the interconnection matrix contributes to the training of the operating personnel designated to work in electrical substations.
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