Selection of the best siting of static var compensators for effective damping
Selection of the best siting of static var compensators for effective damping
复制标题
选择静态无功补偿器的最佳位置以实现有效阻尼
DOI：
10.1002/eej.4391170107
复制
发表时间：
1995
影响因子：
0.4
通讯作者：
Y. Sekine
中科院分区：
文献类型：
--
作者：
H. Okamoto;A. Kurita;N. Kobayashi;Y. Sekine
如果静态无功补偿器（SVC）位置适当，可以提高稳态稳定性（或小信号稳定性）。本文提出了一种在大规模电力系统中选择SVC最佳位置的方法，以有效地阻尼。
传统上，人们认为SVC通过其电压调节能力来提高稳态稳定性。从这个角度来看，SVC可以显着提高稳定性，如果位于母线上，具有大的电压波动，由于轻阻尼功率摆动模式。与传统的观点不同，本文明确了SVC的常规调压控制在某些情况下会恶化系统的稳态稳定性。因此，电压波动不是有效阻尼的适当指标。
本文从模态分析的角度解释了SVC改善系统稳态稳定性的机理。在模态分析的基础上，推导出确定SVC位置的指标。该指数被作者称为LIED（有效阻尼位置指数）。通过对8机纵向系统和29机闭环系统的数字仿真，验证了该指标的有效性。
A static Var compensator (SVC) can improve the steady-state stability (or the small signal stability), if it is located appropriately. The present paper proposes a method for selecting the best siting of SVC in large-scale power systems for damping effectively.
Conventionally, it is thought that SVC improves steady-state stability by its voltage regulating ability. From this point of view, the stability can be improved significantly if SVC is located at the bus which has a large voltage fluctuation due to the lightly damped power swing mode. In contrast to the conventional viewpoint, the present paper makes it clear that the steady-state stability deteriorates by the conventional voltage regulating control of SVC in some cases. Therefore, the voltage fluctuation is not an appropriate index for effective damping.
This paper explains the mechanism of improvement of steady-state stability by SVC in terms of modal analysis. On the basis of modal analysis, an index for determining the location of SVC is derived. The index is called LIED (Location Index for Effective Damping) by the authors. Digital simulations are conducted for an 8-machine longitudinal system and a 29-machine looped system to demonstrate the validity of the proposed index.