Multi-drop-point hybrid direct-current power transmission system power coordination method and device and storage medium

• Main Authors: ZHANG CHENYU, LIU XUHUI, PENG ZHONG, WU JINLONG, NIU CHONG, XUE RUI, ZHENG KUNCHENG, WANG XIANWEI, SHI MINGMING, FEI JUNTAO
• Format: Patent
• Language: Chinese; English
• Published: 08.12.2020
• 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 relates to a multi-drop-point hybrid direct-current power transmission system power coordination method and device and a storage medium, and the method comprises the steps: updating a direct-current limiting value of a VSC under normal conditions when the active power of the VSC is limited; calculating a direct current transfer quantity according to the direct current limit value, the total direct current reference value of the system, the number of VSCs with limited active power and the total number of VSCs in operation; updating a direct current reference value of the non-active power limited VSC according to the calculated direct current transfer quantity; and controlling the corresponding VSC according to the updated direct current reference value. According to the powercoordination method, the system power can be effectively coordinated when the VSC active power is limited, the power stability of the multi-drop-point hybrid direct-current power transmission system is ensured, and the stable