Movable control power supply for power plant or intelligent transformer substation and control method thereof

Abstract

The invention provides a movable control power supply for a power plant or an intelligent transformer substation and a control method thereof, wherein the movable control power supply relates to the field of control technology for a power system. The control power supply comprises an AC input terminal, an AC switch, a monitoring module, a power supply module, an insulated monitoring device, an alarm device, a DC switch, a DC voltmeter, a DC ammeter, a current sensor, a voltage sensor and a DC output terminal. The monitoring module receives an instruction of an upper computer. A composite digital control mode in which fuzzy self-setting PI controlling and repeated controlling are combined is used for automatically adjusting input voltage. The control power supply outputs stable DC voltage. The insulated monitoring device automatically detects whether a DC output loop is grounded or insulation is complete. According to the movable control power supply, an integrated and modular structure is utilized; and functions such as digital intelligent monitoring, various protecting functions and insulation monitoring and alarming are performed; high convenience in field power supply inputting is realized; the dynamic performance of the power supply is effectively improved so that safe and stable operation of the power system with the movable control power supply is realized.

Description

technical field

[0001] The invention relates to the technical field of power system control, in particular to a movable control power supply and a control method for a power plant or an intelligent substation. Background technique

[0002] For newly built or expanded power plants and smart substations, in order to ensure their safe and stable operation, electrical secondary circuits and equipment (relay protection devices, safety automatic devices, control circuits, signal circuits) must be checked at the production site before they are put into operation in the power system , automatic regulation loop) integrity. The above-mentioned electrical secondary circuits and equipment all need a control power supply to drive, and the existing control power supply generally has two types. The first one uses the DC power supply of the power plant and substation as the control power supply. It is fixed in the house and has a metal frame cabinet structure. The main device is a battery ...

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