Additional reactive power control method of flexible direct current

• Main Authors: ZHANG YANJUN, XU WEIHUA, GAO KAI, LI HONGZHI, ZHOU JI, LI QIANG, YANG YUEXI, LI TIE, HAN ZIJIAO, YANG JIE, WANG XIAOYU
• Format: Patent
• Language: Chinese; English
• Published: 07.12.2016
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERATION; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; SYSTEMS FOR STORING ELECTRIC ENERGY; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The invention provides an additional reactive power control method of flexible direct current. The additional reactive power control method comprises the following steps: step one, detecting whether a power grid is in reactive vacancy or reactive redundancy, if yes, generating a first additional reactive command Delta Qvsc and inputting an additional reactive power controller, if not, executing step two; step two, detecting whether a reactive compensation device is switched, if yes, generating a second additional reactive command Delta Q'vsc and inputting the additional reactive power controller, and if not, indicating that the power grid is in normal operation; and step three, controlling the reactive power exertion of a flexible direct current transmission system. According to the additional reactive power control method of flexible direct current provided by the invention, before the reactive compensation device is switched on/off, the flexible direct current is used for emitting/absorbing certain reactive