Unbalanced load control method and control system of three-phase half-bridge inverter
A three-phase half-bridge, balanced load technology, applied in the direction of converting irreversible DC power input to AC power output, reducing polyphase network asymmetry, eliminating/reducing asymmetry in polyphase network, etc. The output voltage of the phase half-bridge circuit cannot be stabilized, etc., to achieve the effect of maintaining stable output and strong practicability
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0042] Please refer to figure 1 , which is a method flowchart of the first embodiment of the method for controlling the unbalanced load of the three-phase half-bridge inverter provided by the present invention. The method for controlling the unbalanced load of the three-phase half-bridge inverter provided by the embodiment of the present invention can be applied to various forms of three-phase half-bridge inverters.
[0043] The unbalanced load control method of the three-phase half-bridge inverter includes:
[0044] Step S101 , separating the positive sequence component and negative sequence component of the three-phase output voltage of the three-phase half-bridge inverter, so as to generate direct current and double frequency harmonics.
[0045] It should be noted that the AC power system is generally ABC three-phase, and the positive-sequence component, negative-sequence component and zero-sequence component of the power system are determined according to the order of the...
Embodiment 2
[0051] Please refer to figure 2, which is the method flow chart of the second embodiment of the method for controlling the unbalanced load of the three-phase half-bridge inverter provided by the present invention. On the basis of the first embodiment, the unbalanced load control method of the three-phase half-bridge inverter in the embodiment of the present invention separates the three-phase output voltage into a positive sequence component and a negative sequence component, and filters out double frequency harmonics. Waves and the process of recombining the separated positive and negative sequence components are described separately.
[0052] The unbalanced load control method of the three-phase half-bridge inverter includes:
[0053] Step S201a, in the forward rotation dq coordinate system, convert the positive sequence component of the three-phase output voltage of the three-phase half-bridge inverter into a DC quantity, and convert the negative sequence component of the...
Embodiment 3
[0081] Please refer to Figure 5 , which is a structural block diagram of the first embodiment of the unbalanced load control system of the three-phase half-bridge inverter provided by the present invention. The unbalanced load control system of the three-phase half-bridge inverter provided by the embodiment of the present invention can be applied to various forms of three-phase half-bridge inverters.
[0082] The unbalanced load control system of the three-phase half-bridge inverter includes:
[0083] A separation unit for separating the positive sequence component and the negative sequence component of the three-phase output voltage of the three-phase half-bridge inverter, so as to generate direct current and double frequency harmonics;
[0084] The filtering unit is used to recombine the separated positive sequence component and negative sequence component after filtering the double frequency harmonic, so that the amplitudes of the three-phase output voltages are basically...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More