Detection method of real-time voltage vectors in energy feedback unit
A real-time voltage and energy feedback technology, applied in the direction of measuring electrical variables, measuring current/voltage, measuring devices, etc., can solve problems such as control influence, inverter overcurrent, phase and amplitude instability, etc., and achieve strong suppression ability Effect
Inactive Publication Date: 2010-12-01
雷富特节能科技(上海)有限公司
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The invention relates to a detection method of real-time voltage vectors in an energy feedback unit, which comprises the following steps: carrying out real-time decomposition and correction on positive and negative sequence components of a power grid, carrying out adaptive notch on the positive sequence component obtained by decomposition, then carrying out decoupling, taking out secondary ripple, further carrying out PI control, then carrying out integration for obtaining the voltage phase, and simultaneously outputting the amplitude of three-phase voltage. Compared with the prior art, the detection method can detect the voltage phase and simultaneously detect the voltage amplitude in a real-time manner, simultaneously detect the voltage and the amplitude of the negative sequence component for facilitating the negative sequence control, have strong capability of inhibiting the imbalance of the three-phase power grid, accurately detect the amplitude and the phase of the positive sequence component within 0.2ms for the added 30% of the negative sequence component and have strong harmonic suppression capability.
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