Performance characteristics of intelligent high-frequency power supply system
In order to ensure the quality of the intelligent high-frequency switching power supply system, we organized multiple technical personnel to inspect multiple manufacturers to understand their production processes, scale, and experimental testing methods. After comparing the products with three different manufacturers, we decided to use the GZDW-200/220 operating power supply for technical transformation. It is a new type of "four remote" high-frequency switching power supply developed specifically for the power system. It adopts high-frequency soft switching technology and modular design, with a nominal output voltage of 220V and a standard RS-232 interface. It is easy to connect with automation systems and is suitable for use in various substations, power plants, and hydropower stations. This device has the following performance characteristics:
1) Modular design, N+1 hot standby, capable of smooth expansion.
2) The monitoring function is complete and highly intelligent, adopting a large LCD Chinese character display and sound and light alarms.
3) The monitoring system is equipped with a standard RS-232 interface for easy access to automation systems, implementing "four remotes" and unmanned operation.
4) Automatic management and maintenance of batteries, real-time monitoring of terminal voltage, charging and discharging currents of battery packs, automatic control of equalizing, floating charging, and regular maintenance equalizing charging.
5) Equipped with battery temperature compensation function.
6) The module can be plugged and unplugged with power, making it easy to replace.
7) The voltage reduction method adopts a new high-frequency soft switch stepless bidirectional voltage regulation, abandoning the traditional silicon stack voltage reduction method, with high output voltage accuracy and fast dynamic response speed.
8) Adopting the latest soft switching power supply technology and imported components.
Improvement issues in the renovation of DC system equipment
1) Improved the unreasonable layout of the DC feeder section of the new equipment. To save investment, we utilized the control, signal, and closing circuit outgoing lines of the original DC system, but they were not suitable for the position and size of the new equipment's outgoing lines. Therefore, we modified the DC outgoing line part of the new equipment according to the actual situation on site, making installation easier, wiring more reasonable, and operation more reliable.
2) Added a discharge circuit for the battery.
3) Based on the actual situation of the power grid in Zhongyuan Oilfield, changes have been made to the unsuitable parameter settings of the equipment at the factory to ensure more reliable operation of the equipment.
4) The installation positions of electrical components such as flash relays have been adjusted. The installation position of the original components is not entirely reasonable, and it is inconvenient to maintain or replace them after damage. The modified position is convenient for maintenance, saving time and effort.
5) Improvements have been made to the module monitoring unit, DC monitoring unit, and AC monitoring unit, with the addition of protective covers to prevent short circuits, dust entry, etc
