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A wind-solar hybrid power supply system for traction power supply

A technology of wind-solar hybrid power generation and traction power supply, applied in the direction of power network operating system integration, battery circuit device, information technology support system, etc., can solve the problem of excessive equalization, achieve the effect of solving the problem of excessive phase separation, promote development and utilization, and have a simple structure

Inactive Publication Date: 2011-12-14
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology

It can solve the problem of connecting power supply for electrified railways in specific sections in remote areas, restrain the impact of negative sequence problems generated by electrified railways on the power system, solve the problem of excessive phase separation of electrified railways, and help promote new energy in traction power supply application in

Method used

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  • A wind-solar hybrid power supply system for traction power supply
  • A wind-solar hybrid power supply system for traction power supply
  • A wind-solar hybrid power supply system for traction power supply

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Embodiment Construction

[0024] The wind-solar hybrid power generation system proposed by the present invention for traction power supply is as follows: Figure 1-Figure 6 shown. The present invention will be further described below in conjunction with accompanying drawing:

[0025] Such as figure 1 As shown, the wind-solar hybrid power supply system for traction power supply is composed of several wind-solar hybrid power generation units, energy management units, and single-phase transformers in traction substations. The AC power is transformed into DC 1200V through the rectifier circuit and Boost circuit; the DC power generated by the photovoltaic cell is converted into DC 1200V through the Boost circuit; the 1200V DC power is converted into single-phase 50Hz AC power through the inverter unit, and is boosted to 35KV by a single-phase transformer for direct supply The traction substation is used as the traction power supply; between the power output side of the wind-solar hybrid power generation u...

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Abstract

The invention discloses a wind / solar hybrid power supply system for traction power supply. A wind turbine generator system generates a three-phase AC with a rated voltage of 690V, a rectification circuit and a Boost circuit convert the three-phase AC into a 1200V DC, a photovoltaic cell generates a DC, the Boost circuit converts the DC into a 1200V DC, an inversion unit inverts the 1200V DC into a single-phase 50Hz AC, a single phase transformer boosts the voltage to 35KV and directly supplies the single-phase 50Hz AC as a traction power source to a traction electrical substation, and an energy management unit controls the wind / solar hybrid power supply system for traction power supply to operate under four working conditions, according to the real operation conditions. In the power supply method of the invention, a wind / solar hybrid power supply is directly accessed to the primary side of the traction electrical substation, the complexity of the traction transformer is simplified, the negative phase-sequence problem and neutral-section passing problem generated by a railway electrification system in a power supply section are avoided, and the application of renewable energy in traction power supply is promoted.

Description

technical field [0001] The invention relates to a traction power supply system, in particular to the technical field of using wind energy and light energy complementary power generation for direct traction power supply. Background technique [0002] With the rapid development of electrified railways, the electrification rate of my country's railways has reached 45% in 2010. In northern China, railways often pass through uninhabited areas such as Gobi and deserts. There is no power supply for stations and communication relay stations along the line. The voltage level of power grids in remote areas cannot meet the operating needs of electrified railways. The power supply capacity of long-distance power transmission is weak and Cost more. Secondly, due to the asymmetry of the traction load, a large number of traction loads connected to the power system will cause the three-phase imbalance of the power system and seriously affect the power quality of the power system. Therefor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J9/00H02J7/00
CPCY02B70/30Y04S20/20
Inventor 谭永东王砚帛杨佳李聪覃六生鲁小兵李中西马天虎褚召伟段晚晴
Owner SOUTHWEST JIAOTONG UNIV
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