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首页> 外文会议>Third Beijing International Conference on Power Transmission amp; Distribution Technology 2001; Nov 26-30, 2001; Beijing >Application Benefits of GPS Synchronised Current Differential Protection
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Application Benefits of GPS Synchronised Current Differential Protection

机译：GPS同步电流差动保护的应用优势

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Since the mid 1980's current differential protection has been implemented in digital relays, and widely employed as main protection of transmission and distribution networks worldwide. Current differential protection is an ideal complementary main protection technique to distance protection for many reasons, notwithstanding the fact that the former does not need VT inputs in order to function. In many countries the electrical utilities are being forced to seek economies, and one such solution is to lease the protection telecommunications channel. For current differential protection, the performance of this channel is critical to the reliable operation of the scheme. It may be that the channel is merely part of the former utility-owned telecomms network that has now been transferred to the private sector, alternatively leasing a channel from the localational telecomms provider can be an option for newly-constructed lines. The key point to note is that the channel is now not under the direct management and supervision of the power utility. The telecomms provider will often only be contractually obliged to provide a routing from substation to substation, with no guarantees as to the path of data messages within the telecomms network, and thus no guarantees of channel propagation delay times etc. This paper investigates the problems that may be faced when using leased telecomms circuits, and how in the case of synchronous digital hierarchy (SDH or SONET ring) telecomms, GPS synchronised current differential protection in numerical relays can be a powerful means of ensuring reliable protection.
机译：自1980年中期以来，电流差动保护已在数字继电器中实现，并已广泛用作全世界传输和分配网络的主要保护。尽管有很多原因，电流差动保护是距离保护的理想补充主保护技术，尽管前者不需要VT输入即可起作用。在许多国家，电力公司被迫寻求经济，而这样的解决方案之一就是租赁保护电信信道。对于电流差动保护，该通道的性能对于方案的可靠运行至关重要。可能是该渠道只是原来的公用事业电信网络的一部分，该网络现在已转移到私营部门，或者，从本地/国家电信提供商那里租借一个渠道可能是新建线路的一种选择。要注意的关键点是，该渠道现在不受电力公司的直接管理和监督。电信供应商通常仅应按照合同规定提供从变电站到变电站的路由，而不能保证电信网络内数据消息的路径，因此也不能保证信道传播延迟时间等。本文研究了以下问题：使用租用电信电路时可能会遇到的问题，以及在同步数字体系（SDH或SONET环）电信中，数字继电器中的GPS同步电流差动保护如何成为确保可靠保护的有力手段。

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