800 KV HVDC for Transmission of Large Amount of Power Over Very Long Distances

Short-term reliability equivalence algorithm for flexible transmission equipment

“…7, with the available capacities of 3000-4500 MW, 4500-6400 MW, and 6000-9000 MW respectively [2]. With the failure of one valve, the 12-pulse bridge has to be out of service until the fault valve is repaired and reinstalled.…”

“…For short term evaluation, the instantaneous state probability P(t) is defined by (2). With given initial state P (t 0 ), P(t) and the corresponding unavailability U(t) are given by (3) and (4), where D is the subset of unavailable states.…”

“…Based on power electronics technology, flexible transmission equipments, such as the high-voltage DC transmission (HVDC) and HVDC-light [1,2], static var compensator (SVC), thyristor controlled series compensator (TCSC) [3][4][5][6], static synchronous compensator (StatCom), and unified power flow controller (UPFC), are applied in power transmission to improve var balance, voltage profile, transfer capacity, and dynamic performance [7][8][9].…”

High-Voltage Engineering and Applications in Our Modern Society

“…-Energies produced at power stations are increased to kV levels with the step-up transformers to reduce Joule losses in long-distance transportations [1,2]. Consequently, many AC-DC transmission line projects up to 1200 kV have been constructed or are under way in many countries [3][4][5][6][7][8][9][10][11][12][13][14][15]. The application of high voltage in electrical power transmission is the most common, but electrical engineers also use this know-how in many other fields (e.g., [15][16][17][18][19][20][21]).…”

A prototype optical fibre direct current sensor for HVDC system

“…Furthermore, these transducers utilize oil-filled porcelain insulators to isolate the secondary parts from the primary parts, which make them not only very large and heavy, but also give them a high risk of explosion and fire. In particular, when a typical rated voltage of an HVDC project is up to 6800 kV (Asplund et al, 2006;Maruvada, 2008), galvanic isolation will be tighter and more significant. Therefore, the demand for novel direct current measurement devices for HVDC transmission system has arisen.…”