Backup uninterruptible power supply having rapid switch-off capability
A backup and fast technology, applied in emergency power supply arrangements, electrical components, circuit devices, etc., can solve problems such as high cost, high equipment cost, and inability of dynamic voltage restorers to ensure continuous normal operation and improve operating efficiency. Effect
Inactive Publication Date: 2015-09-23
TSINGHUA UNIV
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Problems solved by technology
At present, a prominent problem of power quality is voltage sag and short-term interruption. The corresponding solutions mainly include dynamic voltage restorer (DVR), uninterruptible power supply (UPS), dynamic voltage sag compensator (hereinafter referred to as DYSC), etc. Among them, the DVR is a series device. When the system power supply is interrupted, the dynamic voltage restorer cannot work; the online UPS has a large online loss and high cost, and the backup UPS responds slowly and cannot meet the requirements of sensitive loads; DYSC is a single Phase H-bridge topology, for the three-phase power system, its equipment cost is relatively high, especially when the system power supply interruption time is greater than 1 second, due to the increase of three-phase energy storage leads to high equipment cost, it is difficult to widely promote in the industry
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[0012] A backup type uninterruptible power supply with fast shut-off capability proposed by the present invention is described in detail in conjunction with the accompanying drawings and embodiments as follows:
[0013] Backup type uninterruptible power supply of the present invention, as figure 1 As shown, the device includes an energy storage module, a bidirectional DC-DC converter module, a three-phase inverter module, and a fast shutdown module; wherein, the energy storage module is connected in parallel with the low-voltage DC side of the bidirectional DC-DC converter module, and the bidirectional The high-voltage DC side of the DC-DC converter module is connected in parallel with the DC side of the three-phase inverter, and the three-phase output terminals A1, B1, and C1 of the AC side of the three-phase inverter are respectively connected in parallel to the three-phase output terminals of the fast shutdown module and the load M In between, the N line of the three-phase ...
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The invention relates to a backup uninterruptible power supply having rapid switch-off capability, belonging to the technical field of electrical equipment. The device comprises an energy storage module, a bidirectional DC-DC converter module, a three-phase inverter module and a rapid switch-off module, wherein the energy storage module is connected in parallel with a low-voltage DC side of the bidirectional DC-DC converter module, a high-voltage DC side of the bidirectional DC-DC converter module is connected in parallel with the DC side of the three-phase inverter, three-phase output ends A1, B1 and C1 of the AC side of the three-phase inverter are respectively connected in parallel between the three-phase output end of the rapid switch-off module and a load M, an N line of the three-phase inverter is connected with an N1 line of the load M, the three-phase input end of the rapid switch-off module is respectively connected with a phase A, a phase B and a phase C of a system power supply AC, and the three-phase output end of the rapid switch-off module is further simultaneously and directly connected with the load M. In the backup uninterruptible power supply, the rapid switch-off module based on an insulated gate bipolar transistor is used, the inverter is in a backup mode, so that running efficiency can be improved, and a sensitive load can be ensured to run continuously and normally.
Description
technical field [0001] The invention belongs to the technical field of power equipment, and in particular relates to a backup uninterruptible power supply with rapid shutdown capability. Background technique [0002] With the improvement of my country's modern industrial technology and people's living standards, power quality problems have become increasingly prominent, and power quality control technology has become the key to solving power quality problems. At present, a prominent problem of power quality is voltage sag and short-term interruption. The corresponding solutions mainly include dynamic voltage restorer (DVR), uninterruptible power supply (UPS), dynamic voltage sag compensator (hereinafter referred to as DYSC), etc. Among them, the DVR is a series device. When the system power supply is interrupted, the dynamic voltage restorer cannot work; the online UPS has a large online loss and high cost, and the backup UPS responds slowly and cannot meet the requirements ...
Claims
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IPC IPC(8): H02J9/06
Inventor任磊
OwnerTSINGHUA UNIV