RMU-ai mai kyau da ake amfani da su don kogin wadanda ake gina ko kogin hankali

Ring main units da na kusa (RMUs) suna nufin cewa su ce da RMUs mai gas mai kyau. A lokacin da RMUs da na kusa shiga, ana amfani da load switches daban-daban kamar VEI, tare da puffer-type ko kuma load switches mai gas. Ba tare, idan SM6 series ta zama yadda ake amfani da ita da yawa, ya zama zabe ta hanyar da ake amfani da RMUs da na kusa. Duk da cewa RMUs da na kusa suna da halayen da suka duba, yadda aka yi shine da kaɗan daaka da SF6-encapsulated type—indan da switch na uku da zaɓu da groundi ya zama a cikin housing mai epoxy resin cast insulated.

SF6 yana da muhimmanci a matsayin medium da ke gaba wani mai tsawon kasa da kuma insulator. RMUs da na kusa suna da yawan amfani da SF6 ko vacuum load switches, wanda ke taimakawa da kan kara amfani da greenhouse gases, da kuma yin installation da maintenance da yawa. Haka daya, idan a nan da ake amfani da ita ya zama da yawa, amma akwai karfin da ake amfani da ita a duniya. Circuit breaker solutions suna da SF6 ko vacuum circuit breakers da suke shiga a kofin, wanda ke bayar da flexible installation options.

Akwai abubuwa ga utilities wajen koyar da yawan da rike da duration of power outages da kuma yin operational continuity of medium-voltage secondary distribution networks. Customers suna neman cewa idan distributed generation ta zama da yawa, in ba da shiga da power supply continuity, kara energy losses, da kuma yin overall grid loading capacity ya zama muhimmiyar. Don haka, customers suna neman cewa ake bukata don invest in medium-voltage grids don yin data acquisition da kuma enable seamless communication between substations and control centers.

Fadada Customers:

• Flexibility to apply different levels of automation across various smart grid zones.

• Cost savings by using Remote I/O RIO600 devices without replacing legacy equipment in main substations.

• Improved reliability, reflected in better System Average Interruption Duration Index (SAIDI) and System Average Interruption Frequency Index (SAIFI).

• The HBC circuit breaker panel is only 500 mm wide and includes all protection, communication, and automation equipment, making it ideal for existing substations with limited space.

ABB ta baka hankali da new recloser solution for secondary substations based on UniSec switchgear, equipped with the multifunctional HySec device that integrates the circuit breaker and disconnector into a single compact unit. The advanced REC615 protection relay is used for control, monitoring, and protection of cable feeders via IEC 61850 and IEC 60870-5-101/104 protocols, providing excellent fault detection and location capabilities. To enhance reliability and reduce outage duration and frequency, ABB's solution is built on logical selectivity between protection relays, an effective method for minimizing the affected area during faults. Furthermore, to improve grid selectivity, ensure continuous power delivery, and reduce energy losses, high-precision current and voltage sensors provide extremely accurate measurements to the relays.

In ABB's solution, the recloser can operate at three different automation levels. To activate the appropriate automation level for a specific section of the medium-voltage grid, the operator simply selects the corresponding configuration option in the REC615 software. To ensure power system reliability and performance, the solution relies on GOOSE-based peer-to-peer communication technology. GOOSE (Generic Object Oriented Substation Event) is part of the IEC 61850 standard for power system automation.