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Power distribution | Power Generation and Distribution ... heart of any HVDC system is the converter. As modern power electronics developed, thyristors came to be used for this purpose. In 1975, Siemens initiated the world's first thyristor-operated long-distance HVDC transmission system, between the Cabora Bassa power plant, in what is now Mozambique and the Republic of South Africa.

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LEYTE-LUZON HVDC POWER TRANSMISSION: COMMISSIONING …· PDF fileThe Naga converter station is located in the south-east corner of the island of Luzon and acts principally as an inverter. As shown on Figure 3, it is connected to the 500 kV double circuit Naga-Tayabas (operating at 230 kV) and Naga-Labo transmission lines (and …

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HVDC converter transformers - Hitachi ABB Power Grids Light converter transformers up to 1,500 MW and 500 kV Why Hitachi ABB Power Grids? Hitachi ABB Power Grids has delivered more than half of the world's projects has designed and manufactured more than 550 HVDC converter transformer units in the range 80 kV …

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Technology of a UHVDC Converter - ScienceDirect· 10.1.1.1. Basic Converter Unit. The converter valve is the basic unit of a converter. Fig. 10.1 shows that a three-phase bridge converter circuit is comprised of six converter valves, giving it the name of six-pulse converter. The pulse number of the converter is a characteristic of a converter connection expressed as the number of nonsimultaneous symmetrical commutations occurring during one ...