Control parameter setting method of inverter for flexible DC power transmission system

• Main Authors: HU ZHOU, YANG BINYOU
• Format: Patent
• Language: Chinese; English
• Published: 26.06.2018
• 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 discloses a control parameter setting method of an inverter for a flexible DC power transmission system, which mainly comprises: in the operation of the flexible DC power transmission system, the effect of the overall control characteristic of the inverter on the stability of the system is analyzed by the establishment of a single-ended flexible DC transmission system small signal equivalent model, and on the basis, the influence of the time constant T on the stability of the system can be determined by changing the outer ring time constant T in the inverter control system to observe the root locus change condition, the outer ring PI parameters, Kp1, and Ki1 also can be adjusted through changing the time constant, and finally, a set of better PI parameters can be found, and the system satisfies the performance indexes. The control parameter setting method of the inverter of the flexible DC power transmission system of the invention solves the problem of poor system transient and dynamic response