BSI250 - 250 kW power converter for battery energy storage system

Application

BSI250 bidirectional AC-DC power converter is designed to work with battery energy storage system.

Converter allows:

• charging and discharging the battery energy storage system to the power supply grid,
• active and reactive power control,
• parallel connection of to multiply power..

Specifications:

AC Side - Power Grid

• Voltage U_AC: 3 x 400 V ¹⁾
• Frequency: 45 ÷ 66 Hz
• Nominal current I_AC: 362 A

DC Side - Battery Pack

• Voltage U_DC: 600 ÷ 800 V
• Current I_DC: 0 ÷ 425 A
• Overload: 150% 30 sekund, 120% 10 minut
• Short Circuit Endurance (AC Side): 5 x In for t < 100 ms
• Ingress protection: IP21

Current harmonic level

• THDI <3% ²⁾

Communication

• Connectors: RS-485, Ethernet
• Communication Protocol:
  • Modbus RTU: function 3, 6, 16
  • Modbus TCP/IP: function 3, 6, 16
• RS-485 baud rate: 2400, 4800, 9600, 19200, 38400, 57600, 115200 bit/s

Internal protection of the inverter

• Short-circuit protection: short circuit at the output of the inverter
• AC overcurrent: instantaneous value 2,5 I_N, RMS 2,5 I_N
• DC overcurrent: instantaneous value 2,0 I_DC-MAX
• Overvoltage AC/DC: 1,1 Uin (Uin = 400V) AC; 800V_DC ³⁾
• Undervoltage: 0,85 Uin
• Thermal: heat sink temperature sensor
• Analog input control: checking for no "living zero" in modes 2..10V and 4..20mA
• Fast short-circuit protection (fuse link) from AC side: 500A aR

Dimensions

• 1600 x 2200 x 640 [mm]

¹⁾ Ability to work for 80-120% range
²⁾ For nominal values
³⁾ Adjustable by parameter

Construction

 

The main component of the device is the AC/DC/DC power converter, which is responsible for the process of charging and discharging the connected battery bank. In addition, the necessary equipment to ensure proper operation of the device has been placed in the electrical cabinet. On the outside of the cabinet door there are: the main circuit breaker of the 400 VAC power circuit, the auxiliary circuit breaker 110 VDC, the control panel and the indicator lights. 

Lead constructor: Jarosław Załęski, MSc Eng.

 

 

 

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