Silicon rectifier capacitor energy storage DC system circuit

 Silicon rectifier capacitor energy storage DC system is widely used in the DC power supply of 35kV substations. Its DC panel system diagram
is shown in the figure. It consists of two sets of silicon rectifiers Ul and Uz, two sets of capacitor banks cl and C2, two isolation transformers Ti and
Tz, as well as circuit breakers, resistors, diodes, contactors and fuses. In the figure, the low-voltage relay KV
is used for Uz under-voltage alarm; Ro is the current-limiting resistor to limit the output current of U2.