HVDC with Voltage Source Converters – A Desirable Solution for Connecting Renewable Energies
HVDC with Voltage Source Converters – A Desirable Solution for Connecting Renewable Energies
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带有电压源转换器的高压直流输电——连接可再生能源的理想解决方案
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
R. Ottersten
中科院分区：
文献类型：
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作者：
Y. Jiang;R. Ottersten
当通过HVDC轻型输电系统将风电场（WP）连接到主电网（MG）时，WP变得与MG解耦，这在各个方面为输电系统运营商（TSO）、WP开发商和WTG制造商带来了若干技术和经济效益。对于TSO来说，最重要的可能是HVDC-Light连接的WP变得与普通发电厂相当; MG侧HVDC Light换流器可以直接连接到控制或电力调度中心。期望的结果还在于，出现在WP或MG电网中的AC故障将不会被HVDC光传输系统传播，这具有若干期望的结果，诸如可能减小WTG上的机械应力。此外，电网规范合规性主要成为HVDC Light的责任，这导致WTG和WP开发人员可能会更加关注可靠性，效率和成本降低问题。此外，固有的HVDC Light电压和频率控制能力简化了WP黑启动，WP黑启动瞬态不会转移到MG。具有非常低的电磁场、无油电缆和紧凑尺寸的换流站的环境友好的HVDC轻型传输系统还允许更自由地选择到MG的“正确”连接点，这可以避免WP引入电网“瓶颈”和不期望的新负载流路径。
When connecting a wind park (WP) to the main grid (MG) by way of an HVDC Light transmission system, the WP becomes decoupled from the MG, which results in several technical and economical benefits, on a variety of aspects, for transmission system operators (TSOs), WP developers and WTG manufacturers. Perhaps most important for TSOs is that an HVDC-Light connected WP becomes comparable to a normal power plant; the MG-side HVDC Light converter can be directly connected to a control or power dispatch center. A desirable consequence is also that AC faults appearing in the WP or MG grid will not be propagated by the HVDC Light transmission system, which has several desirable consequences such as possibly reduced mechanical stresses on the WTGs. In addition, grid code compliance mainly becomes the responsibility for HVDC Light, which results in that WTG and WP developers may place more focus on reliability, efficiency and cost reduction issues. Furthermore, the inherent HVDC Light voltageand frequency-control capability simplifies WP black starts and WP energization transients will not transfer to the MG. An HVDC Light transmission system, being environmentally friendly with very low electromagnetic fields, oil-free cables and compactly dimensioned converter stations, also allows for more freedom to select the “right” connection point to the MG, which may avoid that the WP introduces grid “bottlenecks” and undesirable new load-flow paths.