DC‐type grid‐connection system of PV generation and its control schemes

Abstract

Summary Compared with the AC‐type photovoltaic (PV) grid‐connection system, its DC counterpart has characteristics like simpler control mode, less power loss, and higher PV utilization. However, there are few researches that gave clearly the topology and control strategies of the DC‐type integration system of PV generation, especially systems with the multimodule boost full bridge isolation converter (BFBIC). In this paper, taking a pilot project as an example, the topology and control strategies of the DC‐type grid‐connection system are given. Models of the PV cell, the BFBIC, and the clamp double submodule (CDSM)‐based modular multilevel converter (MMC) are presented first. Then, the output voltage and power of PV are analyzed and compared. Suggestions on the application of the control strategy are given finally.

Fuzzy logic controller-based enhancement for grid-connected large-scale PV systems

“…A distribution grid-interfaced photovoltaic (PV) system represents an advanced configuration that intricately integrates solar photovoltaic panels with the local distribution grid, which forms a pivotal component of the broader electrical power infrastructure. This integration establishes a dynamic interplay between the PV system and the distribution grid, enabling the bidirectional flow of electrical energy [63][64][65][66][67][68][69][70][71]. In this setup, the PV system has the capability to draw energy from the distribution grid when its output is insufficient and simultaneously inject excess generated energy back into the grid when production exceeds local consumption.…”