Parallel connection communication power supply system and control method thereof

A technology of communication power supply and parallel connection, which is applied in the direction of parallel operation of DC power supply, current collectors, electric vehicles, etc. It can solve problems such as high price, poor working point condition, and inability to expand capacity, and achieves easy implementation, simple cutover process, and adjustment device. set a simple effect

Active Publication Date: 2009-07-01
VERTIV CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If it is necessary to expand the capacity of an existing set of power supplies or 1+1 hot backup, if the two sets of power systems cannot communicate with each other, since the load distribution between the two sets of power supplies is uncontrollable, different types of power supplies The condition of the operating point is poor when the machine is in parallel
For a power supply system, the existing expansion technology can only be realized by adding rectifier modules o

Method used

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  • Parallel connection communication power supply system and control method thereof
  • Parallel connection communication power supply system and control method thereof
  • Parallel connection communication power supply system and control method thereof

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Embodiment Construction

[0027] Such as figure 1 A parallel communication power supply system shown includes a master power supply 1 and a slave power supply 2 . The positive terminals of the output busbars of the master power supply 1 and the slave power supply 2 are connected together, and the negative terminals are connected together to jointly bear the external load. The main power supply and the slave power supply are respectively provided with backup batteries 3 connected in parallel.

[0028] The rated output voltage of the main power supply 1 is 53.5V, which is also the set value of the system output voltage when the communication power supply system works normally, that is, the floating charge voltage.

[0029] The rated output voltage of the slave power supply is the floating charge voltage + voltage deviation, the voltage deviation can be selected, the general range is 0.1V ~ 1.0V, and the default value is 0.5V. The slave power supply also has a current limiting point, and its output curr...

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Abstract

The invention relates to a parallel communication power supply system and a control method thereof. A positive busbar and a negative busbar of a main power supply are connected with a positive busbar and a negative busbar of a slave power supply respectively; the rated output voltage of the slave power supply is higher than that of the main power supply; and the slave power supply is also provided with a current limiting point, and an output current of the slave power supply does not exceed the current corresponding to the current limiting point. When the external load is the light load or the normal load, the current limiting point is a normal current limiting point and the normal current limiting point remains the same; when the external load is the heavy load, the current limiting point changes with the load. The two sets of the power supplies which are connected in parallel can realize the capacitance expansion without communication, the voltage deviation exists between the main power supply and the slave power supply, and the current limiting point is arranged on the slave power supply to realize the current automatic distribution among power supply modules which are connected in parallel, so that the load is appropriately distributed among the power supply modules; moreover, the regulation and the setting of parameters are simple, and the cut-over process is so simple that the positive and the negative busbars of the two sets of the power supplies are only required to be connected respectively. The system can be used for capacitance expansion of the prior one set of the power supply and can also realize the 1 plus 1 hot backup of partial capacitance.

Description

technical field [0001] The invention relates to a communication power supply, in particular to a parallel communication power supply system and a control method thereof. Background technique [0002] In the application of communication power supply, sometimes it is necessary to expand the capacity of the power supply, or 1+1 hot backup of the power supply system is required. Both of these situations can be attributed to the situation that two sets of power supplies share the same set of loads. If it is necessary to expand the capacity of an existing set of power supplies or 1+1 hot backup, if the two sets of power systems cannot communicate with each other, since the load distribution between the two sets of power supplies is uncontrollable, different types of power supplies The condition of the operating point is poor when parallel machines are used. For a power supply system, the existing expansion technology can only be realized by adding rectifier modules or rectifier c...

Claims

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Application Information

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IPC IPC(8): H02J1/10H02J7/34
Inventor 曹丰年
Owner VERTIV CORP
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