Development of the Experimental Stand for Studying and Testing Digital Protection Terminals

Abstract

However, the approach to designing laboratory stands for training students and electrical personnel on the specifics of using digital protections in most cases has remained the same, which does not allow for fully realizing their potential. The purpose of the work is to improve the quality of the knowledge and practical skills received by students in the work with digital protection blocks. To achieve the goal, a specialized laboratory stand for testing digital security terminals has been developed. The stand consists of a mathematical model of the protected object, implemented in the form of a computer program and hardware, which allows real-time conversion of changes in model mode parameters into physical signals transmitted to the digital protection device. The stand provides the terminal feedback with the model, which makes it possible to study the protection behavior in the characteristic operating modes of the protected element. The protection of the "line-transformer" block using the Siprotec 4 7SJ6 Siemens terminal is considered. It is possible to calculate the protection operation parameters, configure the digital protection device, and also check the correct operation of the protections by automatically simulating normal and emergency operation modes of the protected object. The software and hardware of the stand makes it easy to expand its capabilities by adding new models of power system objects and other digital protection devices. The equipment used in the developed stand does not require significant capital investments, which makes this approach accessible to higher educational institutions.

Тестування Мікропроцесорних Терміналів Релейного Захисту В Розрахункових Режимах

“…Для виконання цього необхідно вибрати оптимальні характеристики та параметри спрацьовування (уставки) захисту. Оптимальне налаштування захисту можливе, тільки за наявності повної інформації про двигун, що захищається: його важливості в технологічному процесі, характері навантаження, можливості забезпечення самозапуску, умовах експлуатації [10,11].…”

“…Віртуальні моделі мають як переваги, так і недоліки в порівнянні з випробувальними стендами [12]. Їхня позитивна властивість -завдяки блочному принципу побудови можна легко змінювати не лише параметри, а й конфігурацію первинної мережі, тоді як на стенді конфігурація мережі, як правило, задана жорстко.…”

Relay protection devices functionality comparative analysis

“…That is why it is important, even at the stage of studying at a higher educational institution, to gain not only theoretical knowledge, but also practical skills in working with modern equipment. To achieve this goal, laboratory training stands are used [49].…”