A reactive power control method for an inverter topology circuit
A technology of topology circuit and control method, which is applied in output power conversion devices, electrical components, high-efficiency power electronic conversion and other directions, can solve the problems of inverter output current waveform distortion and inability to meet safety requirements.
Active Publication Date: 2016-03-23
爱士惟电力设备贸易(上海)有限公司
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attached by figure 2 It can be seen from the figure that when the inverter outputs reactive power, the inverter output current waveform is distorted, and parameters such as THDI and PF values cannot meet the safety requirements
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[0030] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.
[0031] Such as figure 1 As shown, the inverter topology circuit of the present invention includes a DC current source V DC ; six switching devices, which respectively have a first end and a second end, the second end of the first switching device S1 is connected to the first end of the third switching device S3, the third switching device The second end of S3 is connected to the first end of the fifth switching device S5, and the first end of the first switching device S1 and the second end of the fifth switching device S5 are respectively connected to the direct current source V DC The second end of the second switching device S2 ...
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The invention discloses a reactive power control method of an inverter topology circuit, the inverter topology circuit includes a DC current source ; Six switching devices; six diodes, which are respectively antiparallel connected to the two ends of the six switching devices; the seventh diode; the eighth diode; the first end of the first inductance is connected to the first end of the first switching device Two terminals; the first end of the second inductance is connected to the second end of the second switching device, the second end of the first inductance and the second end of the second inductance are connected to both ends of the AC load or to the mains; When the mains voltage is a positive half cycle, the third switching device is continuously turned on, the first switching device and the sixth switching device work in the same state, and the first switching device and the fourth switching device work complementary; when the mains voltage is a negative half cycle , the fourth switching device is continuously turned on, the working state of the second switching device is the same as that of the fifth switching device, and the second switching device and the third switching device work complementary.
Description
technical field [0001] The invention relates to a reactive power control method of an inverter topology circuit. Background technique [0002] The inverter topology circuit is a high-efficiency inverter topology, which can realize the conversion of PV direct current to AC alternating current energy when used in photovoltaic inverters, and realize grid-connected power generation of solar energy. At present, the main goal of the control method of the inverter circuit is to meet the requirement of an output power factor of 1, that is, to achieve the same phase and frequency between the inverter output current and the grid voltage through phase-locking, and the inverter output PF value is 1, all Output active power, not output reactive power. [0003] For example figure 1 As shown, the specific structure of the H6 inverter topology circuit is that the inverter bridge arm 1 is composed of switching devices S1, S3, and S5, and the inverter bridge arm 2 is composed of switching d...
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IPC IPC(8): H02M1/42
CPCY02B70/10
Inventor 肖俊彦孙耀杰
Owner 爱士惟电力设备贸易(上海)有限公司