解耦变换在电力系统暂态保护中的应用研究

Study on the Application of the Decoupling Transformation in Power System Transient Protection

电力系统暂态保护具有响应快、准确度高、不受工频振荡及过渡电阻影响等特点.相模解耦变换是实现暂态保护的关键技术之一.本文给出了解耦变换的概念,详细分析了暂态保护中各种解耦变换的特点,并提出了新的解耦变换对称分量变换.仿真实验论证了研究结果的正确性.

Power system transient traveling wave protection has the advantages of high response speed, high accuracy and is not affected by power frequency phenomena, e.g., oscillation and transition resistance. Decoupiing transformation is one of the key technologies to realize the transient protection. This paper propoese the concept of the decoupling transformation, analyses the characteristics of the deeoupling transformation of each kind in transient protection, and proposes a new kind of decoupling transformation, i.e. the symmetnical component transformation. The simulation results show the correctness of the research.