Power supply system for random pulse load and control method thereof

Abstract

The invention discloses a power supply system of random pulse load and a control method thereof. The power supply system for random pulse load includes a fully controlled converter, a fully controlledpower converter and a second energy storage unit. The output of the fully controlled converter is connected to the DC bus to provide the average steady-state power component of the required power tothe load. The output of the fully controlled power converter is connected to a dc bus for supplying a dynamic pulsating power component of the required power to the load. A second energy storage unitis used for supplying power to the fully controlled power converter. A method for supply power by parallel connection of a full-control convert and a full-control power converter, It reduces the amplitude of voltage and frequency fluctuation, avoids the power quality problems such as voltage sag, sag or grid-connected failure, improves the power quality of grid side, prolongs the service life of equipment, and realizes the long-term continuous and stable operation of the system.

Description

technical field [0001] The invention relates to the technical field of power supplies, in particular to a random pulse load power supply system and a control method thereof. Background technique [0002] The power required by random pulsed loads (such as radar, ocean waves, tides, etc.) is generally pulsating power, which is generally connected to a large power grid, and the pulsating power is withstand through a large-capacity and strong power grid. However, connecting random pulse loads to the large power grid will cause certain fluctuations in the frequency and amplitude of the power grid. However, if a random pulse load is connected to a weak power grid, there will be severe power fluctuations, and long-term operation will affect the stability of the power supply system. [0003] The random pulse load usually adopts the DC power supply system, and the traditional power supply scheme is based on the diode uncontrolled rectification method to provide DC power. However, t...

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Problems solved by technology

However, the pulsating power of random pulse-type loads will cause severe fluctuations in the intermediate DC bus voltage, which will affect the normal operation of important loads, reduce the service life of equipment, and fail to meet the steady-state and dynamic requirements of the system. Power fluctuations and shocks lead to power quality problems such as grid voltage drops, sags, or grid connection failures, and affect the stability of the front-end power supply system and the performance and life of generators, etc.

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