Multi-objective optimization direct power control method for VSC under resonance power grid based on particle swarm optimization
A multi-objective optimization, particle swarm algorithm technology, applied in the output power conversion device, the conversion of AC power input to DC power output, electrical components and other directions, can solve the deterioration of control target performance, unfavorable power grid reliable and stable operation, unfavorable power grid stability Reliable operation, etc.
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[0053] In order to describe the present invention in more detail, the control method of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
[0054] Such as figure 1 As shown, a particle swarm algorithm-based multi-objective optimization direct power control method of VSC in a harmonic power grid includes the following steps:
[0055] (1) Use single-phase voltage Hall sensor 1 to collect the DC bus voltage V of VSC dc , Using the three-phase voltage Hall sensor 2 to collect the three-phase voltage V on the AC side of the VSC a ~V c And three-phase grid voltage U a ~U c , Using the three-phase current Hall sensor 3 to collect the three-phase current I on the AC side of the VSC a ~I c ;
[0056] Then use the enhanced phase-locked loop 4 to extract the three-phase grid voltage U a ~U c The angular frequency ω and phase θ.
[0057] (2) According to the phase θ, use the dq coordinate transformation module 5 to pair t...
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