Optimization Control Method for DC Power Supply in Strong Interconnected Power Grid for Harmonic Governance

In order to improve the stability of the optimization control of DC power sources in strongly interconnected power grids, this paper studies the optimization control method of DC power sources in strongly interconnected power grids for harmonic governance. Analyze the harmonic problems generated by DC power sources in strongly interconnected power grids and their impact on grid stability. Utilize a PID based current sharing hierarchical decoupling control controller to obtain the current sharing control quantity of the secondary transformer and adjust the output current. Using the equivalent capacity method to calculate harmonic current, introducing a transformer parallel current sharing hierarchical decoupling control model to control harmonics, optimizing PID parameters using the cat swarm algorithm, obtaining the current sharing control quantity of the secondary transformer using the PID based current sharing hierarchical decoupling control controller, adjusting the output current, and achieving optimized control of the DC power supply in a strong interconnected power grid. This method can significantly reduce harmonic distortion rate, improve power grid stability, reduce system losses, improve power grid operation efficiency, and provide technical support for the sustainable development of the power industry.