CROSS SOUND CABLE PROJECT SECOND GENERATION VSC TECHNOLOGY FOR HVDC
CROSS SOUND CABLE PROJECT SECOND GENERATION VSC TECHNOLOGY FOR HVDC
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发表时间：
2004
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通讯作者：
B. Railing;G. Moreau;L. Ronström
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文献类型：
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作者：
B. Railing;G. Moreau;L. Ronström
大型潮流控制装置的存在，如高压直流输电链路，可以对电力市场的发展和运行产生重大影响。在完全放松管制的市场中运营高压直流输电链路，电力系统规划者、市场设计者和系统运营商需要解决三个重要方面的问题：市场、运营和财务。在垂直一体化电力公司的电网规划和运营中，开发和运营高压直流输电资产的成本往往是基于能源传输的经济性来确定的，而高压直流线路消耗或产生的辅助服务很少或根本没有得到重视。然而，在放松管制的市场中，这些服务在很大程度上是分开捆绑的。本文就新西兰高压直流输电线路对新西兰电力市场开发和运营的影响进行了探讨。新西兰岛际高压直流输电线路对实体电力系统和电力市场的成功运行有着重要的影响。虽然目前新西兰运营着一个成熟的电力市场，但在市场规则和工具中，只有一些HVDC链路运营的好处和限制被确定和容纳。通过市场的“调度、定价和调度”工具来表征各直流电线杆的潮流可控性。发电和HVDC调度的优化考虑了发电报价、交流电网约束、电力系统损耗（交流和直流）、供电安全性以及管理电力系统低频性能所需的瞬时储备成本。正在制定的市场政策认识到高压直流输电连接调节岛屿之间电力传输的能力，以及与单极或双极故障相关的安全风险。目前，运行高压直流输电线路的无功功率支持是通过与适当的发电机签订双边合同来确保的。进一步完善高压直流输电线路的市场安排，将会显示通过高压直流输电线路输电的真正价值，并提高新西兰电力系统的经济效益。
The presence of a large power flow controlling device such as an HVDC link can have a significant impact on the development and operation of the electricity markets. In operating HVDC transmission links in a fully deregulated market, power system planners, market designers and system operators need to address issues in three important dimensions: market, operational and financial. In grid planning and operation in vertically integrated power utilities, the cost of developing and operating HVDC transmission assets were often justified based on the economics of energy transmission, and the ancillary services consumed or produced by the HVDC links received little or no attention. However, in deregulated markets, these services are unbundled and separated to a significant extent. In this paper, the authors’ experience on the influence of the New Zealand HVDC transmission link in developing and operating the New Zealand electricity market is discussed. The inter-island HVDC link in New Zealand has a significant influence on the successful operation of the physical power system as well as the electricity market. While at present New Zealand operates a mature electricity market, only some of the benefits and constraints of operation of the HVDC link have been identified and accommodated in the market rules and tools. The controllability of power flow through each HVDC pole is represented in the market “scheduling, pricing and dispatch” tool. The generation and HVDC dispatch is optimised taking into consideration generation offers, ac grid constraints, power system losses (ac as well as dc), supply security and the cost of instantaneous reserves required for managing the under-frequency performance of the power system. Market policies are being developed recognising the ability of the HVDC link to modulate the power transfer between the islands as well as the security risks associated with single or bi-pole failure. Presently the reactive power support for operating the HVDC link is ensured through bilateral contracts with the appropriate generators. Further enhancements to market arrangements for the HVDC link would expose the true value of power transmission through the HVDC link and enhance the economic efficiency of operation of the New Zealand power system.