UPS parallel control power supply
A technology for controlling power supply and control circuit, which is applied in the direction of emergency power supply arrangements, electrical components, circuit devices, etc., can solve problems such as circulating current short circuit, damage equipment, affect the normal operation of loads, etc., and achieve the effect of reducing circulating current and prolonging the service life
Inactive Publication Date: 2018-08-28
上海科众恒盛云计算科技有限公司
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Problems solved by technology
If and only when both UPS inverters are faulty and the mains power is abnormal at the same time, the normal operation of the load will be affected
[0005] However, the above-mentioned parallel redundant paralleling method is to directly connect the parallel UPS outputs in parallel. When this method is running, if the voltage amplitude, frequency, and phase of each UPS are not completely consistent, they cannot output current. The same (that is, load sharing), if the difference is large, it may cause a short circuit of the circulation and damage the equipment
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[0039] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0040] A UPS parallel control power supply, refer to image 3 , including at least 2 parallel-connected UPS100s, and this embodiment takes 3 UPS100s as an example. Each UPS 100 includes an input power supply, a rectifier 120, an inverter 130, a static switch 140 and a control circuit 150, wherein the input power supply adopts an ATS switch cabinet 110, and the ATS switch cabinet 110 includes a main power supply, a storage battery and a bypass power supply, the main power supply and The bypass power supply adopts commercial power, and the three UPS 100 in this embodiment share one ATS switchgear 110 to improve the consistency of the output voltage of the UPS 100 . The static switches 140 of the three UPS 100 are connected to the load in parallel. The controller 152 of each UPS100 is connected to the data bus for communication, and the parallel inform...
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The invention discloses a UPS parallel control power supply, comprising at least two parallel-connected UPS. The UPS comprises an input power supply, a rectifier, an inverter, a control circuit, and aparallel operation information processing feedback circuit which is coupled to the communication bus. The control circuit comprises an output voltage detection circuit coupled to the output end of the UPS, a controller coupled to the output voltage detection circuit, and a logic switching control circuit coupled to the controller to receive the processing signal, and a parallel system communication interface circuit, which is connected to the rest UPS and transmits the working states of all the UPS to a communication bus. The output voltage property of each UPS can be subjected to centralizedanalysis and processing through the arrangement of the parallel information processing feedback circuit, and then the corresponding processing signals are transmitted to a controller of each UPS. When the output voltage of each UPS is inconsistent, the corresponding processing signals are output to enable the output voltage of each UPS to be consistent, so that the circulation between each UPS can be reduced, and the service life of the UPS can be prolonged.
Description
technical field [0001] The invention relates to the technical field of power supply equipment, more specifically, it relates to a UPS parallel control power supply. Background technique [0002] UPS (Uninterruptible Power Supply) is a system device that connects the storage battery with the host, and converts DC power into commercial power through modular circuits such as the host inverter. UPS is widely used in many industries such as telecommunications, finance, government, and manufacturing. It can provide uninterrupted power supply for equipment, so that users will not affect their work or lose data due to power outages. It mainly plays two roles in the application of the power supply system: one is emergency use, preventing sudden power failure from affecting normal work and causing damage to equipment and data; "Power pollution" such as low voltage, wire noise, and frequency offset improves power quality and provides high-quality power to the system. [0003] Such as...
Claims
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IPC IPC(8): H02J9/02H02J9/06
CPCH02J9/02H02J9/062
Inventor 俞嵘
Owner 上海科众恒盛云计算科技有限公司