Single-phase 660V-3.3KV long-distance distributed direct power supply system

A power supply system and distributed technology, applied in the direction of power transmission and AC network, can solve the problems of limited construction scale, affected by weather conditions, and unstable power supply quality, so as to reduce the overall cost and achieve the effect of reliable and stable power supply.

Active Publication Date: 2012-08-01
北京西迈特科技有限公司
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Problems solved by technology

[0008] Using solar energy or wind energy to directly supply power to remote devices, the disadvantage of this solution is that firstly, the quality of power supply is not stable enough, and both solar energy and wind energy are affected by weather conditions; Can not compare with the energy provided by the cable

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  • Single-phase 660V-3.3KV long-distance distributed direct power supply system
  • Single-phase 660V-3.3KV long-distance distributed direct power supply system
  • Single-phase 660V-3.3KV long-distance distributed direct power supply system

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Embodiment Construction

[0042] The specific embodiment of the present invention is described in detail below in conjunction with accompanying drawing:

[0043] refer to figure 1 and figure 2 As shown, the single-phase 660V ~ 3.3KV long-distance distributed direct power supply system in this embodiment includes an intelligent balanced load regulated power supply, a host computer and several distributed intelligent switching power supplies, wherein:

[0044] The intelligent balanced load stabilized power supply includes a control board and successively connected rectifiers, filters, inverters, reactors and transformers. Perform rectification, filtering, inverter and voltage transformation in sequence to output single-phase 660V ~ 3.3KV AC; the control board is used to automatically adjust the PWM of the inverter when there is a deviation between the output voltage of the transformer and the set output voltage. Pulse width signal to keep its output voltage stable; when the abnormal load current outpu...

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Abstract

The invention discloses a single-phase 660V-3.3KV long-distance distributed direct power supply system, which comprises an intelligent load balancing stabilized power supply, distributed intelligent switching power supplies and an upper computer, wherein the intelligent load balancing stabilized power supply sequentially rectifies, filters, inverts and transforms three-phase 380V alternating current, outputs single-phase 660V-3.3KV alternating current according to needs, can automatically regulate the output to keep the output stable, and comprises a control mainboard, and a rectifier, a filter, an inverter, a reactor and a transformer, which are sequentially connected; each distributed intelligent switching power supply converts the 660V-3.3KV alternating current into 220V alternating current, can automatically regulate output to keep the output stable, and comprises an adjustable transformer and an intelligent switching controller; and the upper computer transmits a control instruction to the intelligent load balancing stabilized power supply and the distributed intelligent switching power supplies, and receives and stores local state parameters uploaded by the intelligent load balancing stabilized power supply and the distributed intelligent switching power supplies. The system is low in cost and stable and reliable in power supply.

Description

technical field [0001] The invention relates to a power supply system, in particular to a single-phase 660V-3.3KV long-distance distributed direct power supply system. Background technique [0002] For the power supply system with dispersed equipment load and long power supply distance (2-20 kilometers), such as the power supply system of electromechanical equipment along the expressway, in order to ensure the quality of power supply for remote equipment, the following power supply methods are commonly used at present: [0003] (1), 380V / 220V direct power supply mode [0004] The electrical equipment that is close to the substation (within 4km) often uses low-voltage 380V / 220V direct power supply at present. With the increase of the distance and the increase of the remote load, in order to meet the requirement that the terminal voltage of the remote equipment is not lower than the design index, The diameter of the transmission cable must be increased, resulting in increased...

Claims

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Application Information

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IPC IPC(8): H02J3/36
CPCY02E60/60
Inventor 何友旗马景良
Owner 北京西迈特科技有限公司
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