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首页> 外文期刊>The Journal of Engineering >Impact of DC protection strategy of large HVDC network on frequency response of the connected AC system
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Impact of DC protection strategy of large HVDC network on frequency response of the connected AC system

机译：大型HVDC网络的直流保护策略对连接的交流系统的频率响应的影响

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摘要

Integration of renewable energy generations requires the transmission of bulky power over long distance, and high-voltage direct current (HVDC) transmission systems become a more preferable choice compared to conventional HVAC systems. For HVDC systems, one of the important concerns is the DC protection strategy which can significantly impact on the connected AC system performance, e.g. system frequency. The maximum loss-of-infeed for a AC network is highly dependent on the duration of the power outage, and the impacts of DC fault protection arrangements which result in different speed of power restoration on the connected AC system, on the system frequency, have not been properly understood. Different DC protection arrangements using DC disconnectors, fast and slow DC circuit breakers on frequency response of the connected AC networks are investigated. A three-terminal meshed HVDC system is studied to demonstrate system behaviour during DC faults.
机译：集成可再生能源需要长距离传输大功率，与常规HVAC系统相比，高压直流（HVDC）传输系统成为更可取的选择。对于HVDC系统，重要的考虑因素之一是DC保护策略，该策略可能会严重影响所连接AC系统的性能，例如：系统频率。交流网络的最大馈电损耗很大程度上取决于断电的持续时间，而直流故障保护装置的影响会导致所连接的交流系统的电源恢复速度不同，从而影响系统频率。没有被正确理解。研究了使用DC隔离开关，快速和慢速DC断路器对连接的AC网络的频率响应的不同DC保护装置。研究了三端网格HVDC系统，以演示直流故障期间的系统行为。

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