Energy storage converter black-start power supply circuit

Abstract

The invention discloses an energy storage converter black-start power supply circuit, and belongs to the technical field of energy storage converter black-start. The circuit comprises a three-phase rectification module, an AC side current limiting module, a DC side current limiting module, a bus pre-charging control module and a black start power supply. The input end of the three-phase rectification module is connected with a power grid, and the output end of the three-phase rectification module is connected with the bus pre-charging control module and the black start power supply through the AC side current limiting module. The input end of the direct-current side current limiting module is connected with a direct-current power supply, and the output end of the direct-current side current limiting module is connected with the bus pre-charging control module and the black-start power supply. The circuit integrates a direct current pre-charging function, an alternating current pre-charging function and a function of supplying power to a black-start power supply, so that real-time and effective power supply of the control system is ensured, the number of used devices is small, and power consumption is low. By arranging the direct current side switching module, the zero-loss power supply black-start power supply can be realized.

Description

technical field [0001] The invention belongs to the technical field of black start of energy storage converters, and in particular relates to a black start power supply circuit of energy storage converters. Background technique [0002] PCS (Power Storage Converter), as an inverter product with bidirectional energy interaction, is mainly used in scenarios such as power grid peak regulation and frequency regulation, backup power supply, power smoothing on the generation side, and peak shaving and valley filling on the user side. Since PCS is at the core of energy interaction, in addition to meeting the national standards, the black start function has also become a mandatory function of the owner. A reliable and real-time power supply system is a prerequisite for the realization of this function. [0003] The black start function is: at the moment of power failure of the power grid, the PCS can be converted from a simple capacity conversion device to a power source with indepe...

AI Technical Summary

Problems solved by technology

[0004] In the conventional power supply design and pre-charging design in the past, PCS only had DC pre-charging, or only AC pre-charging, or black start power supply alone, single function, too many secondary circuits inside PCS, and unreliable power supply, etc.

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