A high-efficiency pulse width modulation method for energy storage system
A pulse width modulation, energy storage system technology, applied in output power conversion devices, electrical components, AC power input into DC power output and other directions, can solve the problem of large conduction loss, large current stress of switching devices, and system working efficiency. Reduce and other problems, to achieve the effect of reducing power loss, optimal efficiency, and good economic use value
Active Publication Date: 2022-06-28
JIANGSU RCT POWER ENERGY TECH CO LTD
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Problems solved by technology
[0002] At present, the new energy industry is developing rapidly. In order to use energy reasonably and improve energy utilization, energy storage systems are often equipped. For energy storage systems, whether it is charging or discharging, all charging and discharging The current must flow through the respective switching devices, resulting in large current stress of the switching devices, large conduction loss and other power loss, which reduces the overall working efficiency of the system
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[0023] like figure 1 As shown, a high-efficiency pulse width modulation method for an energy storage system is used for the pulse width modulation of the energy storage system. The energy storage system includes a topology circuit module, an ADC interrupt sampling processing module 1, and an interrupt loop control module 2 connected in sequence. 3, the interrupt modulation control module 3, the topology circuit module includes several switching devices, the interrupt modulation control module 3 adopts the existing SPWM control chip, and the interrupt loop control module 2 includes a phase-locked loop PLL, a PR controller, and a regulator PI;
[0024] Among them, the topology circuit module, ADC interrupt sampling processing module 1, interrupt loop control module 2, and interrupt modulation control module 3 in the energy storage system are all existing circuit modules. The switching device is connected to the single-chip microcomputer through the interrupt modulation control mo...
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The present invention provides a high-efficiency pulse width modulation method of an energy storage system, which can effectively reduce power loss and improve the overall working efficiency of the system; after power-on, the energy storage system starts the ADC to interrupt the sampling processing module to sample the mains, The control of the energy storage system is realized by phase-locking the mains voltage; the ADC interrupt sampling processing module judges in real time whether the AC instantaneous voltage is less than a set value, and if so, the ADC interrupt sampling processing module samples the data Send it to the interrupt loop control module for data processing, send a response command to the interrupt modulation control module, and judge that the flow path of the current freewheeling loop is the pulse width modulation mode of the switch device body, if not, pass the pulse width modulation method of the switching device body The interrupt modulation control module is controlled, and the flow path of switching back to the current freewheeling circuit follows the pulse width modulation method of the body diode of the switching device in the energy storage system.
Description
technical field [0001] The invention relates to the technical field of pulse width modulation, in particular to a high-efficiency pulse width modulation method of an energy storage system. Background technique [0002] At present, the new energy industry is developing rapidly. In order to rationally utilize energy and improve the utilization rate of energy, energy storage systems are often equipped. For energy storage systems, whether it is charging energy storage work or discharging work, all charging and discharging are carried out. The current must flow through the respective switching devices, resulting in large current stress of the switching devices, large conduction loss and other power losses, which reduces the overall working efficiency of the system. SUMMARY OF THE INVENTION [0003] In view of the above problems, the present invention provides a high-efficiency pulse width modulation method for an energy storage system, which can effectively reduce power loss an...
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IPC IPC(8): H02M7/5395
CPCH02M7/5395
Inventor 石发成李白龙洪德映王福梅朱乔
Owner JIANGSU RCT POWER ENERGY TECH CO LTD