首页> 外文OA文献 >Incorporation of dynamic voltage stability constraints in the ATC determination of power system
【2h】

Incorporation of dynamic voltage stability constraints in the ATC determination of power system

机译:将动态电压稳定性约束条件纳入电力系统的ATC确定中

摘要

The evaluation of available transfer capability (ATC) in deregulated power system should take into account thermal limits, transient, steady-state and dynamic angle stability as well as the voltage stability limits. The consideration of voltage stability in the determination of ATC, however, was usually neglected. On the other hand, under the power market environment, voltage instability becomes a more important consideration in many countries in recent years, especially when following a large disturbance in a heavily stressed power system over long distances. To satisfy the increasing need of updating and posting the ATC values at regular intervals, on-line voltage stability assessment with acceptable accuracy is required. Classified along the time-scale, the voltage stability of a system may be split into two categories of the short-term and long-term dynamics. In this paper, short-term dynamics is assumed to be satisfied in a stable way, which is common in most practical cases. Quasi-steady-state (QSS) approximation of long-term dynamics is introduced to evaluate ATC with dynamic voltage stability constraints. A new ATC determination scheme using QSS approximation is proposed in this paper and implemented on a test system. The performance of the QSS approximation is also compared with the full-time-scale simulation. From the results, it shows that the proposed scheme can evaluate ATC with dynamic voltage stability constraints at acceptable accuracy, while the calculation speed is accelerated considerably to meet the real-time requirement.
机译:解除管制的电力系统中的可用传输能力(ATC)的评估应考虑到热极限,瞬态,稳态和动态角度稳定性以及电压稳定性极限。但是,通常忽略了在确定ATC时对电压稳定性的考虑。另一方面,在电力市场环境下,近年来,电压不稳定性已成为许多国家中更为重要的考虑因素,尤其是在长距离重负荷电力系统遭受较大干扰时。为了满足日益增长的定期更新和发布ATC值的需求,需要以可接受的精度进行在线电压稳定性评估。按照时间尺度分类,系统的电压稳定性可以分为短期和长期动态两类。在本文中,假定以稳定的方式满足短期动力学,这在大多数实际情况中很常见。引入长期动态的准稳态(QSS)近似值来评估具有动态电压稳定性约束的ATC。本文提出了一种新的基于QSS近似的ATC确定方案,并在测试系统上实现。 QSS近似的性能也与全时标仿真进行了比较。从结果可以看出,该方案可以在动态电压稳定约束条件下,以可接受的精度评估ATC,同时大大加快了计算速度,可以满足实时性要求。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号