Development of power system analyzers for evaluating stabilization control in electric

本研究旨在发展电力系统分析器，以应用于直流输电电力系统之稳定控制。在2003年的研究项目中，我们取得了以下成果：1.电力系统分析仪中发电机模型的开发和评估：我们在MATLAB/Simulink中通过框图建立了同步发电机模型。特别是我们讨论了一个单一的发电机无穷大系统的暂态动力学，这是与我们的发电机模型表示，基于动力系统理论。由此得出结论，动力系统理论适用于评估电力系统分析仪的实验结果。2.模拟交流输电线路模型的评估：我们评估了与电力系统分析仪中的交流输电线路模型相对应的电抗器的物理量。3.混合型电力系统分析仪的开发与评估：我们将发电机模型和交流线路模型与AC/DC板、电流传感器和功率放大器相结合。因此，我们开发了一种新的混合型电力系统分析仪。此外，模拟器进行了评估，与几个实验测试。4.分析研究在AC/DC电力系统的暂态稳定性：我们推导了一个分析的判据暂态稳定边界，并澄清了约束动力学的AC/DC系统之间的交流和直流传输的功率关系考虑。

This research aims to develop power system analyzers for stabilization control of electric power systems with dc transmissions. In the research project term 2003, we obtained the following results.1.Development and evaluation of generator models in power system analyzers: We modeled synchronous generators via block diagrams in MATLAB/Simulink. In particular we discussed transient dynamics of a single generator-infinite bus system, which is represented with our generator models, based on dynamical system theory. It was thus concluded that dynamical system theory is applicable to evaluate experimental results of power system analyzers.2.Evaluation of analog ac transmission line models: We evaluated physical quantities of reactors that correspond to ac transmission line models in power system analyzers. Hence we have finished the development of several elements for power system analyzers.3.Development and evaluation of hybrid-type power system analyzers: We combined generator models and ac line models with ac/dc boards, current transducers and power amplifiers. As a result, we developed a new hybrid-type power system analyzers. In addition the simulator was evaluated with several experimental tests.4.Analytical studies on transient stability in ac/dc power systems: We derived an analytical criterion for transient stability boundaries, and clarified constrained dynamics of ac/dc systems taking the power relation between the ac and dc transmissions into account.