Rational reconstruction of sectioning posts of AC catenary at disconnectors

Operation of sectioning posts of the AC catenary at the disconnectors on the Gorkovskaya railway for a period of more than 60 years has shown its reliable operation, and the maintenance was reduced to a minimum. However, due to the growth of heavy haul and high-speed traffic on a number of sections, their reconstruction was required. In accordance with the current regulatory documents, such a reconstruction provides for the transfer of the operation of sectioning posts from disconnectors to circuit breakers. In connection with the reliable operation of the sectioning posts on disconnectors and the simplicity of their maintenance, it is proposed to expand the options for the reconstruction of the sectioning posts on the disconnectors and to introduce three reconstruction options into the regulatory documents. The first option provides for the reconstruction of the sectioning post with disconnectors by transferring it to the classic scheme with four switches, as indicated in the current regulatory documents. The second option provides for leaving the sectioning post at the disconnectors, but adding a fast-acting automatic reclosing device in the inter-substation zone in case of passing short circuits. The third option provides for the reconstruction of the sectioning post on disconnectors with the introduction of a vacuum circuit breaker into the bus of the post and a device for high-speed automatic reclosing and opening of the disconnector, in the zone of which a short circuit has occurred. The schemes of automatic devices for determining a stable (passing) short circuit in a traction network and a device for determining the location of damage are considered. The operation of the sectioning posts, reconstructed according to the indicated options, has been tested practically at the existing sections of the power supply of the traction network of the Gorkovskaya railway. All of them have shown high reliability.

1. German L. A., Subkhanverdiev K. S., German V. L. Avtomatizatsiya elektrosnabzheniya tyagovoy seti peremennogo toka. Ucheb. posobie [Automation of power supply of AC traction network. Textbook]. Nizhniy Novgorod, branch of SamGUPS Publ., 2020, 234 p.

2. Markvardt K. G. Elektrosnabzhenie elektrifitsirovannykh zheleznykh dorog [Power supply of electrified railways]. Moscow, Transport Publ., 1982, 528 p.

3. Figurnov E. P. Releynaya zashchita. Ch. 2 [Relay protection. Part 2]. Moscow, GOU “UMTs po obrazovaniyu na zheleznodorozhnom transporte” [GOU “Training Center for Education in Railway Transport”], 2009, 604 p.

4. German L. A., Subkhanverdiev K. S., Yakunin D. V., Zhevlakov D. A., Karpov I. P. Avtomatizatsiya elektrosnabzheniya tyagovoy seti s postom sektsionirovaniya na raz"edinitelyakh [Automation of power supply of a traction network with a sectioning post on disconnectors]. Elektronika i elektrooborudovanie transporta, 2020, no. 5, pp. 2 – 9.

5. Traction power supply of the railway: set of rules: SP224.1326000.2014. Approved by order of the Ministry of TransTransport of Russia dated December 2, 2014 No. 330. URL: https://docs.cntd.ru/document/1200120202 (retrieved on 13.06.2021) (in Russ.).

6. Intelligent connection terminal 27.5 kV Inter-27.5-FKS: operation manual: AVO93-00-000-00 01 RE. St. Petersburg, Advertising Bureau “DIO”, 2013. 21 p. (in Russ.).

7. STO RZD 07.021.5–2018. Protection of railway power supply systems from short circuits and overload. Part 1-5. Moscow, Tekhinform Publ., 2019, 304 p. (in Russ.).

8. Subkhanverdiev K. S., German L. A., Vyazov E. V., Zhevlakov D. A. Ustroystvo avtomatizatsii posta sektsionirovaniya kontaktnoy seti peremennogo toka na raz"edinitelyakh [Automation device for sectioning station of AC catenary at disconnectors]. Pat. No. 2725823 Ros. Federatsiya; оpubl 06.07.2020, Byul. No. 19 [Utility Patent No. 2725823 Russian Federation; publ. 06.07.2020, Bull. No. 19] (in Russ.).

9. Silovoe oborudovanie tyagovykh podstantsiy zheleznykh dorog. Sb. spravochnykh materialov [Power equipment of traction substations of railways. Coll. of reference materials]. OAO “RZhD”, filial PKB po elektrifikatsii zheleznykh dorog [JSC “RZD”, branch of the PKB for electrification of railways]. Moscow, TRANSIZDAT Publ., 2004, 384 p.

10. German L. A., Subkhanverdiev K. S., Popov A. Yu., Petrov I. P., Vyazov E. V., Figurnov E. P. Sposob opredeleniya udalennosti korotkogo zamykaniya v kontaktnoy seti peremennogo toka mnogoputnogo uchastka (varianty) [Method for determining the distance of a short circuit in AC contact network of a multitrack section (options)]. Pat. No. 2747112 Ros. Federatsiya; opubl. 27.04.2021, Byul. No. 12 [Utility Patent No. 2747112 Russian Federation; publ. 27.04.2021, Bull. No. 12] (in Russ.).