Abstract In this article the research results of application of back-to-back HVDC system in the Tomsk electric power system are presented. Historically, power transmission between the South to the North parts of the Tomsk electric power system is realized via the long double-circuit 220 kV overhead transmission line. However, due to electrical load increasing and growing complexity of the grid, as well as the length (about 800 km) and low transfer capacity of this transit, it cannot be used as a reliable link for parallel operation of these parts, as a consequence, there is an operational section at this transit. To solve this task, the back-to-back HVDC system is proposed to provide an asynchronous link for parallel operation of these parts. Therefore, appropriate studies and calculations were performed, in particular the optimal location and sizing of back-to-back HVDC system were defined. Extra researches of back-to-back HVDC’s impact on emergency scenarios of Tomsk electric power system power are conducted. It is shown, that its installation decreases the level of short-circuit current and oscillations in electric power system, and as a result increases the stability of load operation, especially motor load.

中文翻译：

---

背靠背高压直流输电系统在托木斯克电力系统中的应用分析

摘要 本文介绍了背靠背高压直流输电系统在托木斯克电力系统中的应用研究成果。历史上，托木斯克电力系统南北部分之间的电力传输是通过220kV长的双回架空输电线路实现的。然而，由于电力负荷的增加和电网的日益复杂，以及该过境的长度（约 800 公里）和低传输能力，它不能作为这些部分并联运行的可靠链接，因此，在这个过境处有一个操作段。为了解决这个任务，背对背高压直流系统被提出来为这些部分的并行运行提供异步链接。因此，进行了适当的研究和计算，特别是定义了背对背 HVDC 系统的最佳位置和大小。对背靠背高压直流输电对托木斯克电力系统电力应急场景的影响进行了额外研究。结果表明，它的安装降低了电力系统的短路电流和振荡水平，从而提高了负载运行的稳定性，尤其是电机负载。