Three-ring control device and method of a converter
A three-loop control and inverter technology, applied in the field of inverters, can solve problems that can no longer meet the application requirements
Pending Publication Date: 2018-11-23
珠海泰通电气技术有限公司
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Problems solved by technology
However, when the converter is in an off-grid system, it no longer meets the application requirements
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[0038] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
[0039] See figure 1 , Is a schematic structural diagram of an embodiment of the three-loop control device of the inverter provided by the present invention.
[0040] An embodiment of the present invention provides a three-loop control device for a converter, including a filter circuit 1, a converter 2, an outer loop module 3, a middle loop module 4, and an inner loop module 5;
[0041] The inner loop module 5 is used to collect the filter ca...
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The invention discloses a three-ring control device of a converter. The three-ring control device includes a filter circuit, a converter, an outer ring module, a middle ring module and an inner ring module. The inner ring module is used for collecting voltages of a filter capacitor and setting an inner ring reference value when the converter stays in an off-grid state. The middle ring module is used for collecting currents of a micro-grid load and output currents of the converter when the converter serves as an inverter and for setting a middle ring current reference value. The outer ring module is used for collecting direct-current voltages and setting a direct-current voltage reference value when the converter serves as a rectifier. The converter is used for providing power to the micro-grid load according to a first control signal, outputting desired currents according to a second control signal, and outputting stable direct-current voltages according to a third control signal. Theinvention also discloses a three-ring control method of a converter. Through the embodiment of the invention, the current response can be quickly tracked, stability of the direct-current voltages canbe ensured, voltages at an output end can keep constant, unified control can be truly realized, and the control method is simple.
Description
Technical field [0001] The present invention relates to the technical field of inverters, and in particular to a three-loop control device and method for inverters. Background technique [0002] With the development of power semiconductor technology, reliability and stability have been further improved, and the rapidity of power electronic devices has been favored, and power electronic converter control technology is an important factor in determining the performance and life of power electronic equipment. determining factors. At present, for different occasions, the name of the converter is different, and the structure of the control system is also different, but the principle is mainly divided into: current control type and voltage control type. [0003] The control device in the prior art generally includes a sampling circuit, a capture circuit, a DSP controller, a driving circuit, etc. The signal generated by the DSP controller is amplified by the driving circuit and sent to t...
Claims
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IPC IPC(8): H02M7/72
CPCH02M7/72
Inventor李建霖吴亚杰韦延清王乐鹏李政霖李庆顺
Owner珠海泰通电气技术有限公司