Parallel inverter topology control method and system
A topology control and parallel technology, which is applied in the direction of converting AC power input to DC power output, output power conversion devices, electrical components, etc., to achieve the effects of ensuring consistency, suppressing zero-sequence circulation, and reducing the impact
Active Publication Date: 2022-07-12
厦门科华数能科技有限公司
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[0005] The purpose of the present invention is to provide a parallel inverter topology control method and system to solve the technical problem of how to suppress the zero-sequence circulating current of parallel inverter modules in the prior art
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[0042] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.
[0043] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.
[0044] Please refer to figure 1 , figure 1 A schematic structural diagram of a parallel inverter topology control method provided by an embodiment of the present invention, the parallel inverter topology control method is applied to a control module corresponding to a parallel inverter topology, and the parallel inverter topology includes a main inverter module and at least one Slave inverter module. The master invert...
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The present invention provides a parallel inverter topology control method and system. The method includes: a host control module determines phase information between the host modulation voltage and the grid voltage based on a pre-calculated host modulation voltage, and compares the phase information with the pre-calculated host modulation voltage. The obtained grid voltage is sent to the slave control module; the host control module determines the zero-sequence voltage according to the phase information and the grid voltage, updates the pre-calculated host modulation voltage according to the zero-sequence voltage, and based on the updated host The modulation voltage controls the master inverter module; the slave control module determines the zero-sequence voltage according to the phase information and the grid voltage, updates the pre-calculated slave modulation voltage according to the zero-sequence voltage, and based on the update The latter slave modulated voltage controls the slave inverter module. The invention can effectively suppress the zero-sequence circulating current generated by the parallel connection of each inverter module.
Description
technical field [0001] The invention belongs to the technical field of inverter control, and more particularly, relates to a parallel inverter topology control method and system. Background technique [0002] Parallel connection of modules is a common way to increase the single-unit capacity of power electronic equipment. For example, parallel inverter topology, parallel inverter topology is composed of multiple inverters in parallel. The parallel operation of inverters can realize large-capacity power supply, and at the same time, it can greatly improve the flexibility of the system and greatly reduce the volume and weight of the power supply system. [0003] In the existing parallel inverter topology, each module of the system is controlled by an independent inverter system. Affected by factors such as analog sampling error and power imbalance between modules, the zero-sequence voltage calculated by the control system of each module will exist. difference. For the system...
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IPC IPC(8): H02M1/32H02M7/493
CPCH02M1/32H02M7/493Y02E10/56
Inventor 胡斌黄凯伦林镇煌吴佰桐
Owner 厦门科华数能科技有限公司