DC Operating Power Systems

DC Operating Power Systems are key systems that provide reliable DC power for control, signal, protection and automatic devices in power systems such as substations and power plants. The system is mainly composed of charging devices, battery packs, DC busbars and DC distribution panels. As the core, the charging device is responsible for converting AC power into DC power and charging the battery pack. Common types include phase-controlled rectifier type and high-frequency switch rectifier type, each with different advantages and disadvantages. As an energy storage component, the battery pack provides continuous and stable DC power when the AC power fails. Commonly used are lead-acid batteries and nickel-cadmium batteries, each with its own advantages and disadvantages. As a conductive path, the DC busbar connects various components to ensure that the power is stably supplied to the DC load. The DC distribution panel is responsible for distributing the power to specific DC loads and is equipped with protection devices to prevent failures.

In terms of working principle, after the DC Operating Power Systems rectifies the AC power through the charging device, it not only provides power to the DC load, but also float charges the battery pack to maintain its full capacity. When the AC power fails, the battery pack automatically switches to a discharge state, and provides power to the DC load through the DC bus and DC distribution panel to ensure the normal operation of the power system. This system is widely used in scenarios such as substations and power plants. For example, in substations, it provides power for the opening and closing operations of Circuit breakers, relay protection devices, etc., to ensure timely isolation of faulty equipment; in power plants, it also provides power for control operations such as starting and stopping of generator sets to ensure the safe operation of the units.

For the maintenance of DC Operating Power Systems, the key lies in the regular inspection and maintenance of batteries, charging devices, DC buses and distribution panels. For batteries, check the electrolyte level, specific gravity, and perform charge and discharge tests to ensure good battery performance; for charging devices, check the output voltage, current, and component operating temperature to ensure normal operation; for DC buses and distribution panels, check the connection firmness, insulation, and protection device status, and clean dust to prevent failures. These maintenance measures are essential to ensure the stable operation of DC Operating Power Systems.