论文标题
考虑不平衡电压条件和转换器限制的电力电子转换器主导的电力系统短路计算的有效方法
An Effective Methodology for Short-Circuit Calculation of Power Systems Dominated by Power Electronics Converters Considering Unbalanced Voltage Conditions and Converter Limits
论文作者
论文摘要
本文介绍了由电力电子转换器主导的电力系统短路计算的挑战。已经提出了一种新的方法，以确定研究系统的短路平衡点，并考虑到电源转换器的运行和局限性。研究的系统已使用基于元素的稳态公式进行建模。特别是，包括在转换器控制上实现的管理方程，该方程涉及特定的控制模式和各种潜在的电流饱和状态。然后，已经提出了一种有效而有效的方法来确定满足转换器限制的短路平衡点。使用VSC的数值案例研究表明，所提出的方法可以有效，准确地识别出短路平衡点，并具有不同类型和短路断层的深度。短路计算结果已通过动态模拟验证。
This paper deals with the challenge of short-circuit calculation for power systems dominated by power electronics converters. A novel methodology has been presented to identify short-circuit equilibrium point of the studied system considering the operation and limitations of power converters. The studied system has been modeled with an element-based steady-state formulation. In particular, the governing equations implemented on converter control, which involve a specific control mode and various potential current-saturation states, are included. Then, an effective and efficient approach has been proposed to identify the short-circuit equilibrium points that satisfies converters limitations. Numerical case studies with VSCs show that the proposed methodology can identify the short-circuit equilibrium point efficiently and accurately with different types and depths of short-circuit fault. The short-circuit calculation results have been validated with dynamic simulations.
