A customized 5000kVA variable frequency power supply and power distribution device independently developed, produced, and sold by Zhuzhou Fullde has been successfully delivered to an equipment site in Shanghai. The equipment, with its high stability and wide adaptability, provides a reliable solution for high-voltage electricity needs on site, effectively ensuring the continuous and efficient operation of the equipment.

The core products of this supply are variable frequency power supply and power distribution equipment, among which the variable frequency device adopts a ten level multi-level "high high" voltage source form of power unit, combined with electronic power transistor power conversion technology for marine static power supply system. Its working principle is to connect several low-voltage PWM variable frequency power units in series, filter them through phase-shifting transformers, and invert the high-voltage input into a stable high-voltage output after superposition, achieving efficient conversion of electrical energy. ​

Product parameters accurately match on-site working conditions: input voltage is 10kV ± 10% (3-phase, 50Hz), output voltage reaches 11kV (3-phase, 60Hz), rated output power is 5000kVA, topology structure adopts "input phase-shifting transformer+10 level H-bridge power unit series/phase", can operate reliably and continuously for a long time within the range of input voltage fluctuation of ± 10%, and easily cope with changes in grid voltage. ​

The equipment configuration strictly follows the requirements of the primary system diagram, covering 10KV high-voltage incoming switchgear, PT cabinet, station auxiliary transformer cabinet, phase-shifting transformer cabinet, power unit cabinet, reactance cabinet, control unit cabinet, background monitoring system, low-voltage circuit breaker cabinet, high-voltage circuit breaker cabinet, and air conditioning cooling and heat dissipation system. All electrical components are selected from mature and reliable products, capable of withstanding the dynamic and thermal stability tests of the maximum short-circuit current in the circuit, and have corresponding short-circuit breaking capabilities; Copper bars are preferred for connecting cabinets, and when space is limited, cables with the same current carrying capacity are used to balance conductivity efficiency and installation flexibility. ​

The deployment of this device not only meets the high-voltage power supply needs of a certain equipment site in Shanghai, but also provides practical reference for power supply and distribution solutions in similar industrial scenarios with its stable performance and complete configuration. ​