Method for separating positive and negative sequence components on basis of OVPR under non-ideal micro-grid condition
A technology of negative sequence components and separation method, applied in the field of separation of positive and negative sequence components, can solve the problems of complex system, complex structure, reduced phase margin, etc., to eliminate the influence and response of grid voltage imbalance and harmonics. Fast and easy to achieve
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[0053] Embodiment The principle of the separation method of positive and negative sequence components based on OVPR under the condition of non-ideal microgrid is as follows:
[0054] 1. The principle of voltage positive and negative sequence separation
[0055] In the non-ideal situation where there are unbalanced and harmonics in the microgrid voltage, the zero-sequence component is not considered, and the voltage has positive and negative sequence components, as shown in the following formula,
[0056]
[0057] Among them, the voltage positive and negative sequence components and respectively expressed as,
[0058]
[0059] In the formula, the superscripts p and n represent positive and negative sequences. where x=1,2...m, represent the amplitudes of positive and negative sequence and harmonic components respectively, "ω px , ω nx "represent the angular frequencies of the positive and negative sequences and harmonic components, "φ px ", "φ nx "represent the ...
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