Wind power grid broadband harmonic impedance test equipment and harmonic impedance test method

• Main Authors: LIU QIUJIANG, LIU RUI, WU MINGLI, SUN BINGHAN, YU YONGJUN
• Format: Patent
• Language: Chinese; English
• Published: 06.09.2022
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention discloses broadband harmonic impedance testing equipment and a harmonic impedance testing method suitable for a wind power grid. The broadband harmonic impedance testing equipment for the wind power grid adopts a hierarchical control strategy to send harmonic voltage to the wind power grid, the frequency range of the harmonic voltage is 100-5000Hz, and the amplitude range of the harmonic voltage is 0-1000V. The harmonic impedance test technical equipment injects harmonic waves with controllable amplitude and frequency into the wind power grid, collects voltage response and current response of a common connection point port under different frequencies, obtains harmonic impedance characteristics of the wind power grid according to a wind power grid impedance algorithm, and is a reliable technology for construction pre-evaluation of a wind power grid system and detection and maintenance of a power transmission line. 本发明公开了一种适用于风电网宽频带谐波阻抗测试设备及谐波阻抗测试方法，本发明的风电网宽频带谐波阻抗测试设备采用分层控制策略向风电网发出谐波电压频率范围为100Hz～5