Flexible direct-current low-inner-loop current control link delay control device

• Main Authors: SONG YANTAO, LIU XUHUI, OH KYUNG-BUM, WANG QIUKAI, HAO JUNFANG, YUE XIAOGE, LI YAFENG, CAO SEN, YANG MIN, LIU CHEN, FAN XUEFENG
• Format: Patent
• Language: Chinese; English
• Published: 30.08.2022
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

The invention discloses a flexible direct-current low-inner-loop current control link delay control device which comprises an electrical quantity acquisition module, a phase-locked loop control module, an outer-loop power control module, an inner-loop current control module and a bridge arm voltage reference value calculation module. By reducing the execution time of an inner-loop current control algorithm, the time delay of an inner-loop current control link is effectively reduced, the problem of alternating-current high-frequency oscillation is suppressed, and normal and stable operation of an alternating-current power grid system and a flexible direct-current power transmission system is ensured, so that the stability and reliability of the flexible direct-current power transmission system are improved. 本发明公开了一种柔性直流低内环电流控制链路延时控制装置，包括：电气量采集模块、锁相环控制模块、外环功率控制模块、内环电流控制模块和桥臂电压参考值计算模块。通过降低内环电流控制算法执行时间，有效降低内环电流控制链路延时，抑制交流高频振荡问题，保障交流电网系统和柔性直流输电系统正常稳定运行，以提高柔性直流输电系统的稳定性和可靠性。