A direct current power generation system and a control method thereof

Through intelligent protection and coordinated control of photovoltaic cascade sub-units and DC energy storage systems, the voltage fluctuation and reliability problems of DC power generation systems are solved, modular fault bypass and dynamic energy management are realized, and the stability and reliability of the system are improved, making it suitable for medium and high voltage DC power supply scenarios.

CN120658174BActive Publication Date: 2026-02-13BEIJING LEIDONG ZHICHUANG TECH CO LTD +1
2 Cites 0 Cited by

Patent Information

Application Number
CN202510831228.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-06-20
Publication Date
2026-02-13
Estimated Expiration
2045-06-20

AI Technical Summary

Technical Problem

Existing DC power generation systems suffer from large voltage fluctuations, low reliability, lack of effective protection mechanisms, and insufficient precision in the coordinated control of photovoltaic modules and energy storage modules, resulting in limited system stability and efficiency, and failing to meet the demand for medium and high voltage DC power supply.

Method used

By employing photovoltaic cascaded sub-units, DC switches, DC energy storage systems, and intelligent protection and coordinated control strategies, combined with photovoltaic bypass protectors and energy storage bypass protectors, modular fault bypass and dynamic energy storage management are achieved. Real-time monitoring and active damping control are performed through a system stability controller to optimize photovoltaic-energy storage coordinated control.

Benefits of technology

It significantly improves the reliability and stability of the system, supports medium and high voltage DC power supply, reduces maintenance costs, and is suitable for high reliability scenarios such as data centers and industrial production.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The application discloses a direct-current power generation system and a control method thereof, and is characterized in that a photovoltaic and energy storage dual cascade architecture is innovatively adopted, and an intelligent protection and coordinated control strategy is combined. The system comprises N photovoltaic cascade subunits and M direct-current energy storage modules, and each unit is provided with a bypass protection device; the photovoltaic cascade subunit is integrated with an MPPT controller, an isolation converter and a bypass protector comprising a voltage-dependent resistor and a diode; the energy storage module adopts a non-isolated DCDC conversion circuit, and is matched with an energy storage bypass protector integrated with a bidirectional power electronic switch, a voltage-dependent resistor and a mechanical isolation switch. The application effectively solves technical pain points such as large voltage fluctuation, low system reliability and difficult maintenance of a traditional direct-current system, prolongs the service life of equipment while improving the stability of the system, and is particularly suitable for a medium and high voltage direct-current power supply scene.
Need to check novelty before this filing date? Find Prior Art