Reactive power control method for non-isolated single-phase H6 bridge inverter circuit
An inverter circuit and power control technology, applied in reactive power compensation, circuit devices, AC network circuits, etc., can solve problems such as the inability to realize inverter reactive power output control, and achieve easy implementation, output current waveform THD change, Simple effect of control algorithm
Pending Publication Date: 2018-11-02
THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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Problems solved by technology
[0004] The purpose of the present invention is to address the deficiency that the full bridge circuit of unipolar modulation cannot realize the reactive power output control of the inverter, and proposes a reactive power control method of a non-isolated single-phase H6 bridge inverter circuit
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[0021] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing and specific embodiment:
[0022] like figure 1 As shown, a reactive power control method of a non-isolated single-phase H6 bridge inverter circuit, the single-phase H6 bridge inverter circuit realizes non-isolated single-phase grid-connected inverter leading reactive power control and non-isolated Type single-phase grid-connected inverter hysteresis reactive power control, the single-phase H6 bridge inverter circuit includes power switch tube S1, power switch tube S2, power switch tube S3, power switch tube S4, power switch tube S5, power switch tube S6, freewheeling diode D1, freewheeling diode D2, filter inductor L1, filter inductor L2 and filter capacitor C 0 ;
[0023] The grid of the power switch tube S1 is connected to the grid of the power switch tube S6 and then connected to the EPWM1A output port of the control chip DSP, the grid of the p...
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The invention discloses a reactive power control method for a non-isolated single-phase H6 bridge inverter circuit and particularly relates to the technical field of power electronics. According to the reactive power control method for the non-isolated single-phase H6 bridge inverter circuit, advanced reactive power control and lagging reactive power control of a non-isolated single-phase grid-connected inverter are achieved by the single-phase H6 bridge inverter circuit through control of a control chip DSP; and the single-phase H6 bridge inverter circuit comprises a power switch tube S1, a power switch tube S2, a power switch tube S3, a power switch tube S4, a power switch tube S5, a power switch tube S6, a free-wheeling diode D1, a free-wheeling diode D2, a filter inductor L1, a filterinductor L2 and a filter capacitor C0. The advanced reactive power control and lagging reactive power control of a photovoltaic grid-connected inverter are achieved through adopting full-bridge single-polarity modulation of an improved H6 single-phase grid-connected inverter, so that the switching loss is reduced, the THD of an output current waveform is reduced and the control algorithm is simpler and easy to implement.
Description
technical field [0001] The invention relates to the technical field of power electronics, in particular to a reactive power control method of a non-isolated single-phase H6 bridge inverter circuit. Background technique [0002] Conventional resources such as petrochemicals and coal are increasingly depleted, the environment is deteriorating, and the contradiction between energy supply and demand is becoming more and more prominent. The world is vigorously developing and utilizing non-polluting, clean and green renewable energy. Solar photovoltaic power generation is one of the easiest ways to make full use of renewable energy. The main function of the photovoltaic grid-connected power generation system is to complete the grid-connected power generation control of the photovoltaic array, that is, to convert the DC power of the photovoltaic array into AC power with the same frequency and phase as the grid and feed it to the grid. In the photovoltaic grid-connected power gener...
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IPC IPC(8): H02J3/18
CPCH02J3/1821Y02E10/56Y02E40/30
Inventor 邓允长朱文星朱炬毛翌春钱彬孙松源年夫来
Owner THE 41ST INST OF CHINA ELECTRONICS TECH GRP