Theoretical and industrial studies on the electromechanical relay

Vinod, M.; Devadasan, S.R.; Rajanayagam, D.; Sunil, D.T.; Thilak, V.M.M.

doi:10.1504/ijsom.2018.089830

Cited by 2 publications

(2 citation statements)

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“…Long response times of the second and third stages of back-up protection (remote; ground fault protection) are due to the need to ensure selective operation of relay protection devices based on electromechanical relays that are in operation in large numbers [34,35].…”

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confidence: 99%

Methods for Ensuring Stable Operation of Wind Turbines under Standard Disturbances in Distribution Networks

Симонов¹,

Ilyushin²,

Suslov³

et al. 2023

Preprint

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In the context of energy decarbonization, wind farms with type IV wind turbines from various manufacturers are being massively put into operation. These wind turbines comply with the requirements of the grid codes of the countries where they are designed and/or manufactured, but do not factor in the specific features of the distribution networks of other countries to which they are connected. The study at issue involves a comparative analysis of the requirements of grid codes of different countries for the stable operation of wind turbines under standard disturbances. The Low Voltage Ride Through (LVRT) characteristic implemented in type IV wind turbine inverters makes it possible to prevent wind turbine shutdowns in case of short-term voltage dips of a given depth and duration. The calculations of transient processes indicate that wind turbines may not meet the requirements of the grid code of a particular country for their stable operation. As a result, standard disturbances will block the reactive current injection and the wind turbine will be switched off. This is often caused by the relay protection devices with a time delay of 1-2 s, which are used in distribution networks and implement the functions of long-range redundancy. Excessive shutdowns of wind turbines lead to emergency rise in the load for the generating units of conventional power plants, aggravating the post-accident conditions and disconnecting consumers of electricity. The paper presents a method for checking the LVRT characteristic settings for compliance with the technical requirements for wind turbines. To prevent wind turbine outages, one should either change the configuration of the LVRT characteristic, or upgrade the relay protection devices in the distribution network adjacent to the wind farm, or implement group or individual technical solutions at the wind farm. The performance of the proposed technical solutions is confirmed by the calculations of transient processes.

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confidence: 99%

Methods for Ensuring Stable Operation of Wind Turbines under Standard Disturbances in Distribution Networks

Симонов¹,

Ilyushin²,

Suslov³

et al. 2023

Preprint

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“…Relay juga sering digunakan dalam proses produksi yang menerapkan sistem otomasi. Kegagalan fungsi relay dapat mengakibatkan terganggunya proses produksi, merusak produk dan dapat menyebabkan kecelakaan (Vinod, 2018). Mengingat pentingnya peran dan fungsi relay, maka relay harus selalu dalam kondisi baik pada saat digunakan.…”

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Rancang Bangun Concurrent Relay Tester untuk Menunjang Pengelolaan Bahan Khusus di Laboratorium Mekatronika

Wahyudi

Edy

Suyetno

2021

JTMP

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Concurrent Relay Rester merupakan alat yang dirancang dan dibangun berdasarkan kebutuhan alat bantu dalam kegiatan pengelolaan bahan khusus di laboratorium Mekatronika. Untuk merealisaikan pembuatan alat ini, terlebih dahulu dilakukan tahapan perancangan perangkat keras dan perancangan perangkat lunak. Selanjutnya dilakukan penyediaan alat dan bahan yang relevan untuk membangun hasil rancangan menjadi alat jadi yang siap dioperasikan. Perangkat keras Concurrent Relay Rester berhasil dibangun dari sebuah mikrokontroler arduino mega 2560 sebagai pemroses data, 3 push button switch sebagai input, LCD Display sebagai penampil hasil pemeriksaan kontak relay (normally close dan normally open), dan 4 seven segment display sebagai penampil tegangan hasil pemeriksaan coil relay. Logika sistem kerja alat disusun dengan membuat sketch program menggunakan aplikasi arduino ide versi 1.8.13. Concurrent Relay Tester yang dibangun memiliki fitur 3 tombol test selector untuk memilih jenis test (pengujian) relay yang akan dilakukan. Adapun jenis pengujian relay yang dapat dilakukan adalah Normally close Contact Test, Normally open Contact Test, dan Coil Test. Relay tester ini mampu untuk melakukan pengujian/ pemeriksaan 4 buah relay MY4N secara simultan (concurrent). Hasil pengujian 4 buah relay langsung ditampilkan dalam LCD Display dan seven segment display.

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Theoretical and industrial studies on the electromechanical relay

Cited by 2 publications

References 0 publications

Methods for Ensuring Stable Operation of Wind Turbines under Standard Disturbances in Distribution Networks

Methods for Ensuring Stable Operation of Wind Turbines under Standard Disturbances in Distribution Networks

Rancang Bangun Concurrent Relay Tester untuk Menunjang Pengelolaan Bahan Khusus di Laboratorium Mekatronika

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