Commissioning of unit D – new excitation systems for HPP Zakučac, Croatia
Engineers from KONČAR – Electronics and Informatics commissioned final, fourth unit of new static excitation system type SEB 11EK with excitation and braking transformer, for the generator D (160 MVA) on HPP Zakučac in Croatia.
The 4×160 MVA HPP Zakučac is a large hydro power plant in Croatian power generation utility.
Excitation system is implemented in the dual-channel version with bridges in 1 + 1 configuration together with possibility of electrical braking through braking transformer.
Power supply systems for TS Straža and TS Zdenčina
KONČAR – INEM contracted the delivery and installation of new direct current power supply systems in TS Straža and TS Zdenčina with the Croatian Transmission System Operator at the end of August. According to the contract, the existing DC 220 V distribution equipment must be replaced with new systems that will meet the needs of the 110 kV plant, while retaining existing batteries in both transformer stations.
New systems should enable the fulfilment of high standards of the Buyer in terms of quality and reliability of uninterruptible DC voltage power supply. Special attention should be paid to achieving selectivity of circuit breakers in distribution boards in three levels. The contracted systems are KONIS-B 220 V, 40 A type with high-frequency modular rectifiers in redundant parallel connection in accordance with the n + 1 principle.
The contract includes the production of equipment, installation and testing at the facility and commissioning. Production of equipment was completed in record time. The inspection of the equipment quality was successfully carried out in the presence of the investor’s representatives at the test station at the end of October.
Functional testing and signalling testing will follow in the facilities after the installation of the equipment, then commissioning and testing of the distribution selectivity at the characteristic points on the II. and III. protection level of the 110-kV facility.
Commissioning of all three new excitation systems for new hydro power plant – HPP Brežice, Slovenia
During September 2017., Končar – Electronics and Informatics engineers commissioned all three new static excitation system type SEB 11E with excitation transformer, for the generator 1, 2 & 3 (21.5 MVA) on HPP Brežice in Slovenia. The 45 MW HPP Brežice is the fifth in the chain of six hydroelectric power plants on the lower Sava River. The construction of HPP Brežice was launched in March 2014 and last month has started trial run. Excitation system is implemented in the dual-channel version with bridges in 1 + 1 configuration, which provides full redundancy of the system.
