种用于功率单元直流电压平衡控制的动态切换方法

• Format: Patent
• Language: Chinese
• Published: 24.10.2017
• 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

本发明具体公开了种用于功率单元直流电压平衡控制的动态切换方法，通过软件方法进行电压控制的基础之上，同时改变电压幅值及电压相角，各H桥单元在调制电压中叠加个与电流方向致的电压矢量来改变各H桥单元吸收或者释放的有功功率，从而保证在相同电压幅值的基础上，其调节结果为纯有功分量，保证系统的调节效果为最优；其次，根据系统输出电流的幅值和相位信息，动态改变电压指令，使得各单元电压控制性能良好。 The invention discloses a dynamic switching method for power unit direct-current voltage balance control. According to the method, based on software method voltage control, voltage magnitude and voltage phase angle are changed; each H-bridge unit superposes a voltage vector of which the direction is consistent with current direction on a modulation voltage, so that active power absorbed or released by each H-bridge unit can be changed, and therefore, adjustment results can be pure active components with identical voltage magnitudes ensured, and the adjustment effect of a system can be optimal; and a voltage instruction is changed dynamically according to the magnitude and phase information of the output current of the system, and therefore, voltage control performance of each unit is excellent.