CN102244478A - Single-phase power supply method for wind/solar hybrid tractive power supply - Google Patents
Single-phase power supply method for wind/solar hybrid tractive power supply Download PDFInfo
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- CN102244478A CN102244478A CN2011101957115A CN201110195711A CN102244478A CN 102244478 A CN102244478 A CN 102244478A CN 2011101957115 A CN2011101957115 A CN 2011101957115A CN 201110195711 A CN201110195711 A CN 201110195711A CN 102244478 A CN102244478 A CN 102244478A
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Abstract
The invention discloses a single-phase power supply method for a wind/solar hybrid tractive power supply. The single-phase power supply method for the wind/solar hybrid tractive power supply is implemented by adopting the following operating mode that: a wind generator system generates three-phase AC with the rated voltage of 690V, and the three-phase AC is converted into 1,200V DC by a rectification circuit and a Boost circuit; DC generated by a photovoltaic cell is converted into the 1,200V DC by the Boost circuit; the 1,200V DC is inverted into single-phase 50Hz AC by an inversion unit, the single-phase 50Hz AC is boosted to 35kV by a single-phase transformer and directly supplied to a traction substation as the tractive power supply; and the tractive substation supplies power to a traction load in a single-phase wiring way. By the power supply method provided by the invention, a wind/solar hybrid power generation system is directly connected to the primary side of the traction substation as a single-phase power supply to reduce the complexity of the traction transformer, solve the problems of negative sequences and excessive phase splitting caused by electrified railways in power supply sectors and simultaneously achieve favorability for promoting the application of renewable energy sources in the tractive power supply.
Description
Technical field
The present invention relates to the tractive power supply system method of supplying power to, especially adopt the traction power supply technical field of wind energy, luminous energy complemental power-generation.
Background technology
Along with the fast development of electric railway, the China railways electrization rate had reached 45% in 2010.In the northern area of China, railway passes through depopulated zones such as Gobi desert, desert often, station along the line and communication relay station non-transformer can draw for connecing, and line voltage grade from far-off regions is difficult to satisfy the operation demand of electric railway, and long distance power transmission mode power supply capacity is more weak and expensive more.Secondly, because the asymmetry of traction load, a large amount of traction loads insert the three-phase imbalance of electric power system meeting causing electric power system, have a strong impact on the quality of power supply of electric power system.Once more, along with the development of high-speed railway, electric railway electricity section length is increased to about 1km, and about 5% power supply section belongs to non-Electric region, has had a strong impact on the reliability and the locomotive operation efficient of contact line.Thereby influenced the reliability and security of tractive power supply system.
Therefore, the electric railway of remote districts not only will solve connecing of traction power supply power supply and draw problem, also need to solve the electric power quality problem that the negative phase-sequence problem is brought, also need to eliminate traditional electrical gasification railway electricity and divide relative tractive power supply system Influence on security.
The northern area of China especially the Northwest has characteristics such as wind energy resources is abundant, the hours of daylight is long, and country has set up and planned to build upright many places wind energy turbine set and solar power plant in order to large-scale develop and utilize wind energy resources and solar energy resources.At present, because northern area highly energy-consuming load is less, wind-powered electricity generation ancillary transmission engineering lags behind, the wind energy turbine set of having set up is short running time, has produced more serious wind-powered electricity generation wasting of resources phenomenon.
Directly be electrified railway power supply if utilize wind energy resources and solar energy resources to set up the wind-solar complementary type electricity generation system, the electric energy of continous-stable can not only be provided for tractive power supply system, solve the powerup issue of particular section electric railway from far-off regions, also can solve the electric power quality problem that the negative phase-sequence problem is brought, can also eliminate the influence that traditional electrical gasification railway electricity divides relative tractive power supply system.
Summary of the invention
The negative phase-sequence problem that exists in view of the present tractive power supply system of above statement and cross the phase-splitting problem, it is that main power source, batteries are that stand-by power supply directly is the single phase power supply method of electrified railway power supply with the wind-light complementary system that the present invention aims to provide a kind of, enable to solve connecing of particular section electrified railway power supply power supply from far-off regions and draw problem, and suppress of the influence of the negative phase-sequence problem of electric railway generation to electric power system, eliminate the influence that traditional electrical gasification railway electricity divides relative tractive power supply system simultaneously.
Purpose of the present invention realizes by following means.
Wind-solar complementary type traction power supply power supply single phase power supply method realizes that by several single-phase inversion unit each single-phase inversion unit is made up of single-phase inverter and single-phase transformer.Adopt following working method: it is that the three-phase alternating current of 690V is transformed to direct current 1200V through rectification circuit and Boost circuit that the wind-powered electricity generation unit sends rated voltage; The direct current that photovoltaic cell sends is transformed to direct current 1200V through the Boost circuit; The 1200V direct current is single-phase 50Hz alternating current through the inversion unit inversion, boost to 35KV by single-phase transformer, a whole set of wind-solar complementary type traction power supply power supply is not incorporated into the power networks, and directly supplies with traction substation as the traction power supply power supply, and it is the traction load power supply that traction substation adopts the single-phase mode of connection.
Adopt tractive power supply system of the present invention, have following advantage:
(1) the wind-solar complementary type traction power supply power supply single phase power supply method of the present invention's proposition can make electricity generation system in operate as normal under the network operation mode, be output as the single phase industrial frequence alternating current, can be directly as the traction power supply power supply, this supply power mode can effectively be avoided the influence of the negative phase-sequence problem of electric railway generation to electric power system.
(2) the wind-solar complementary type traction power supply power supply single phase power supply method of the present invention's proposition is output as single-phase 50Hz interchange, directly insert traction substation as single phase poaer supply, it is the traction load power supply that electric substation adopts single-phase transformer, the influence of effectively having avoided traditional electrical gasification railway electricity to divide relative tractive power supply system.
(3) the wind-solar complementary type traction power supply power supply single phase power supply method of the present invention's proposition helps lend some impetus to the application of new forms of energy in traction power supply.
(4) wind and solar hybrid generating system that is used for traction power supply of the present invention's proposition is simple in structure, the lower and easy realization of cost.
Description of drawings is as follows:
Fig. 1 is a wind light mutual complementing power generation cellular construction schematic diagram.
Fig. 2 is a wind-solar complementary type traction power supply power supply single-phase inversion cellular construction schematic diagram.
Fig. 3 is a wind-solar complementary type traction power supply power supply single phase power supply method schematic diagram.
Fig. 4 is a wind-solar complementary type traction power supply power supply single phase power supply method application scheme schematic diagram.
Embodiment
The wind and solar hybrid generating system that is used for traction power supply that the present invention proposes such as Fig. 1-shown in Figure 4.The present invention will be further described below in conjunction with accompanying drawing:
As shown in Figure 1, each wind light mutual complementing power generation unit is formed by permanent magnet direct-driving aerogenerator group, wind-powered electricity generation unit motor side rectifier, Boost booster circuit, photovoltaic battery array, batteries.1.5MW it is the 690V three-phase alternating current that the permanent magnetism direct drive wind group of motors is sent rated voltage, is transformed to direct current 1200V by motor side current transformer and Boost booster circuit.Photovoltaic cell sends the logical Boost booster circuit of direct current and is transformed to direct current 1200V.Wind-powered electricity generation unit and photovoltaic cell complemental power-generation, the constant output that keeps power supply unit.Batteries guarantees that by discharging and recharging control the voltage of intermediate dc link is stable.
As shown in Figure 2, the single-phase inverter of wind light mutual complementing power generation unit is made up of single-phase full bridge inverter circuit and machine end transformer.In the single-phase full bridge inverter circuit, the signal complementation of VT1 and VT2, the signal complementation of VT3 and VT4,1,4 brachium pontis and 2,3 brachium pontis are rotated conducting, are that single-phase 50Hz exchanges with direct current 1200V inversion, boost to 35 kilovolts by single-phase transformer again.
As shown in Figure 3, n wind light mutual complementing power generation unit composes in parallel single phase alternating current power supply by n single-phase inversion unit, directly inserts the traction substation primary side, and electric substation adopts single-phase traction transformer to power to traction load.
The tradition method of supplying power to is that three phase mains is inserted the former limit of traction substation, is powered to single-phase load by the traction transformer of different wiring again.
As shown in Figure 4, the wind-solar complementary type electricity generation system is electrified railway power supply according to single phase power supply method provided by the invention, and EMS is carried out safe and reliable management to a whole set of electricity generation system, thereby realizes the operate as normal of wind-solar complementary type traction power supply power supply.
Single phase power supply method provided by the invention directly inserts the traction substation primary side with wind and solar hybrid generating system as single phase poaer supply, electric substation adopts single-phase traction transformer to power to traction load, simplified the complexity of traction transformer, eliminate the negative phase-sequence problem of power supply section electric railway generation and crossed the phase-splitting problem, also helped promoting simultaneously the application of regenerative resource in traction power supply.
Claims (3)
1. wind-solar complementary type traction power supply power supply single phase power supply method, inserting traction substation by several single-phase inversion unit is achieved, each single-phase inversion unit is made up of single-phase inverter and single-phase transformer, it is characterized in that, each single-phase inversion unit is single-phase 50Hz alternating current with the 1200V dc inverter, directly supply with traction substation, the single-phase mode of connection of traction substation transformer adopting is the traction load power supply.
2. a kind of wind-solar complementary type traction power supply power supply single phase power supply method according to claim 1 is characterized in that described wind-solar complementary type traction power supply power supply becomes single-phase 50Hz alternating current by the single-phase inverter direct inverse, boosts to 35kV by single-phase transformer.
3. a kind of wind-solar complementary type traction power supply power supply single phase power supply method according to claim 1 is characterized in that, it is the traction load power supply that described traction substation adopts the single-phase mode of connection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101957115A CN102244478A (en) | 2011-07-13 | 2011-07-13 | Single-phase power supply method for wind/solar hybrid tractive power supply |
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| CN2011101957115A CN102244478A (en) | 2011-07-13 | 2011-07-13 | Single-phase power supply method for wind/solar hybrid tractive power supply |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104319817A (en) * | 2014-11-18 | 2015-01-28 | 贵州电网公司电网规划研究中心 | Analysis method for wind power plant and electric railway interactive influence |
| CN109606208A (en) * | 2019-01-11 | 2019-04-12 | 西南交通大学 | A kind of off-network railway traction power supply system and regulation method |
| CN110299713A (en) * | 2019-06-25 | 2019-10-01 | 西南交通大学 | A kind of tractive power supply system imbalance of three-phase voltage compensation method counted and wind power plant influences |
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| CN101071948A (en) * | 2007-03-29 | 2007-11-14 | 上海大学 | High-efficiency single-phase and three-phase grid-connected generating system |
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| CN201582057U (en) * | 2009-11-19 | 2010-09-15 | 上海万德风力发电股份有限公司 | Household 2-KW air blower direct water pumping multi-use device with wind-solar hybrid generation and water pumping |
| CN201789419U (en) * | 2010-07-06 | 2011-04-06 | 上海儒竞电子科技有限公司 | Low-voltage heavy-current output DC-DC converter |
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- 2011-07-13 CN CN2011101957115A patent/CN102244478A/en active Pending
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| CN101071948A (en) * | 2007-03-29 | 2007-11-14 | 上海大学 | High-efficiency single-phase and three-phase grid-connected generating system |
| CN201582057U (en) * | 2009-11-19 | 2010-09-15 | 上海万德风力发电股份有限公司 | Household 2-KW air blower direct water pumping multi-use device with wind-solar hybrid generation and water pumping |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104319817A (en) * | 2014-11-18 | 2015-01-28 | 贵州电网公司电网规划研究中心 | Analysis method for wind power plant and electric railway interactive influence |
| CN104319817B (en) * | 2014-11-18 | 2015-09-09 | 贵州电网公司电网规划研究中心 | A kind of analytical method for wind energy turbine set and electric iron reciprocal effect |
| CN109606208A (en) * | 2019-01-11 | 2019-04-12 | 西南交通大学 | A kind of off-network railway traction power supply system and regulation method |
| CN109606208B (en) * | 2019-01-11 | 2023-11-03 | 西南交通大学 | Off-grid railway traction power supply system and regulation and control method |
| CN110299713A (en) * | 2019-06-25 | 2019-10-01 | 西南交通大学 | A kind of tractive power supply system imbalance of three-phase voltage compensation method counted and wind power plant influences |
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Application publication date: 20111116 |