The high voltage direct current (HVDC) system connected with weak AC system is considered to be one of the causes for voltage instability.

与弱交流系统相连的高压直流系统被认为是引起电压不稳定的一个因素，评价交直流系统电压稳定性的方法相当复杂。

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The design of filtering equipments is one of the key technologies of the High Voltage Direct Current (HVDC) system.

滤波装置的设计是高压直流输电(HVDC)的关键技术之一。

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Under the terms of the contract, ABB will supply the underwater and underground cables for the high-voltage direct current (HVDC) link.

根据合同条款，ABB将为该高压直流(HVDC)电线提供水下和地下电缆。

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One of ABB's specialties is high-voltage direct current links, so-called HVDC.

FORBES: Magazine Article