一种整流逆变模式下的变流器序阻抗建模方法

• Format: Patent
• Language: Chinese
• Published: 22.12.2023
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

本发明公开一种整流逆变模式下的变流器序阻抗建模方法，特别是关于一种整流逆变模式下的变流器序阻抗建模方法，确定并网PCC点(公共连接点)相位、电压等参量，分别注入频率为fp的正序谐波扰动电压信号和频率为fn的负序谐波扰动电压信号，基于三相变换器的谐波线性化，计算推导主电路中的电气量相应在频域下的表达式，并通过Park坐标变换转换至dq坐标系进行控制，分别针对有功功率环路、无功功率环路、电压电流环路建立输出小信号方程，推导传递函数；同时，本发明在使用时，通过虚拟同步型变流器系统建模过程中考虑二倍镜像耦合频率的影响，提高了对序阻抗建模准确性，并通过算例分析了所提指标体系的正确性和有效性。 The invention discloses a current transformer sequence impedance modeling method in a rectification and inversion mode, and particularly relates to a current transformer sequence impedance modeling method in a rectification and inversion mode. The method comprises the following steps: determining parameters such as phase and voltage of a grid-connected PCC point (common connection point); respectively injecting a positive-sequence harmonic disturbance voltage signal with the frequency of fp and a negative-sequence harmonic disturbance voltage signal with the frequency of fn, and calculating and deducing a corresponding expression of an electrical quantity in a main circuit in a frequency domain based on harmonic lineari