Distribution network three-phase asymmetrical DC power flow calculating method

• Main Authors: WEI ZHINONG, SUN GUOQIANG, CHEN SHENG, ZANG HAIXIANG, ZHOU JIAWEI
• Format: Patent
• Language: Chinese; English
• Published: 26.10.2016
• 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 discloses a distribution network three-phase asymmetrical DC power flow calculating method. Three-phase voltage and current phase angles are phase-shifted, and after phase shift, a three-phase model can meet the simplified assumption of traditional DC power flow. The method is applicable to the calculation of distribution network three-phase asymmetrical DC power flow. A simplified DC power flow model has the following characteristics: non-iterative calculation is adopted; both P-V coupling and Q-theta coupling are considered; the model is applicable to large R/X ratio of a distribution network; and the DC power flow solution includes voltage amplitude and voltage angle. Through the distribution network three-phase asymmetrical DC power flow calculating method proposed by the invention, quick calculation of distribution network three-phase asymmetrical power flow is realized, the Jacobian matrix of a power balance equation is constant, and the calculation efficiency of distribution network three