Parallel control method of inverter, and circuit

• Main Authors: SU WEIFENG, MA XIANLIANG, YIN XIAOGANG, WEI SANMIN, LIAO WENJIAN
• Format: Patent
• Language: Chinese; English
• Published: 09.03.2016
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

The invention provides a parallel control method of an inverter, and a circuit. The same loop calculation is carried out by the control of a host and a slave, a control period and a carrier signal are both synchronous, and therefore, the frequencies of a master inverter and a slave inverter are kept consistent. The method comprises the following steps: A) a host controller and at least one slave controller are successively connected to form a loop and are automatically numbered according to a circuit connection sequence; B) the host controller carries out loop calculation with a feedback value of the self-sampling host controller according to a first control command and a given value emitted from an upper computer, and sends synchronization information to each slave controller; C) the slave controllers synchronously carry out the loop calculation according to the given value, a second control command of the host controller and the feedback value of the host controller, wherein the second control command of th