Uninterruptible power supply phase-locking realization method and terminal equipment
A realization method and power supply technology, applied in emergency power supply arrangement, electrical components, circuit devices, etc., can solve problems such as phase deviation between inverter output voltage and bypass phase, phase lock failure, UPS system collapse, etc., so as to avoid phase lock The effect of failure
Active Publication Date: 2021-11-05
ZHANGZHOU KEHUA TECH CO LTD +1
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Problems solved by technology
Phase-locking is an important control link of the UPS system. If the phase-locking fails, the UPS system will collapse and be damaged when the bypass and inverter output are switched.
[0005] However, due to the filter circuit in the inverter output, when the uninterruptible power supply load changes, the phase of the inverter output voltage and the bypass phase will deviate, resulting in phase-lock failure
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[0025] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the invention may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
[0026] In order to make the purpose, technical solution and advantages of the present invention clearer, specific embodiments will be described below in conjunction with the accompanying drawings.
[0027] see figure 1 , which shows the implementation flow chart of the phase-locking implementation method of the uninterruptible power supply provided by the embodiment of the present invention, and ...
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The present invention is applicable to the technical field of uninterruptible power supply, and provides a phase-locking realization method of the uninterruptible power supply and terminal equipment, wherein, the phase-locking realization method of the uninterruptible power supply includes: acquiring the voltage signal of the target voltage source; The load rate of the uninterruptible power supply; according to the voltage signal of the target voltage source and the load rate of the uninterruptible power supply, adjust the phase of the output voltage of the inverter unit, so that the phase of the output voltage of the inverter unit is the same as that of the The absolute value of the deviation value of the phase of the voltage of the bypass unit is less than or equal to a preset threshold. The invention can perform phase compensation on the phase of the target voltage source according to the load rate of the uninterruptible power supply, so as to avoid the failure of phase locking caused by the change of the load rate of the uninterruptible power supply.
Description
technical field [0001] The invention belongs to the technical field of uninterruptible power supplies, and in particular relates to a phase-locking realization method of an uninterruptible power supply and terminal equipment. Background technique [0002] UPS (Uninterrupted Power Supply), that is, uninterrupted power supply, is a system device that connects the battery to the host, and converts DC power into commercial power through a module circuit such as the host inverter. It is mainly used to provide stable and uninterrupted power supply to a single computer, computer network system or other power electronic equipment such as solenoid valves and pressure transmitters. As computer application systems have higher and higher requirements for power supply, UPS has been paid more and more attention, and can be widely used in various scenarios such as medical care and transportation. [0003] A UPS system generally includes a rectifier unit, an inverter unit, and a bypass uni...
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IPC IPC(8): H02J9/06
CPCH02J9/06
Inventor 吴庆彬周超伟孟涛陈文佳
Owner ZHANGZHOU KEHUA TECH CO LTD