CN102280923B - Wind/solar hybrid power supply system for traction power supply - Google Patents

Wind/solar hybrid power supply system for traction power supply Download PDF

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Publication number
CN102280923B
CN102280923B CN2011101955980A CN201110195598A CN102280923B CN 102280923 B CN102280923 B CN 102280923B CN 2011101955980 A CN2011101955980 A CN 2011101955980A CN 201110195598 A CN201110195598 A CN 201110195598A CN 102280923 B CN102280923 B CN 102280923B
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power supply
wind
traction
phase
power
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CN102280923A (en
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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
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Southwest Jiaotong University
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20End-user application control systems

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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

A kind of wind-photovoltaic complementary power supply system for traction power supply
Technical field
The present invention relates to tractive power supply system, especially adopt wind energy, light energy complementary generating to be directly used in the technical field of traction power supply.
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 the 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 weak and cost is more.Secondly, due to the asymmetry of traction load, a large amount of traction load access electric power system meetings cause the three-phase imbalance of electric power system, have a strong impact on the quality of power supply of electric power system.Therefore, the electric railway of remote districts not only will solve connecing of traction power supply power supply and draw problem, also needs to solve simultaneously the electric power quality problem that the negative phase-sequence problem is brought.
The northern area of China especially the Northwest has the characteristics such as wind energy resources is abundant, the hours of daylight is long, and country has set up and planned to build vertical 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,, wind-powered electricity generation ancillary transmission engineering less due to northern area highly energy-consuming load lags behind, and the wind energy turbine set of having set up is short running time, has produced more serious wind power resources wasting 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, to building energy-saving and environmental protection type tractive power supply system, important effect is arranged, simultaneously also can accelerate the on-site elimination of northern wind power resources, alleviate electric power fan-out capability deficiency to the restriction of wind-powered electricity generation industry development.
Summary of the invention
The problem that exists in view of the tractive power supply system of above statement and the energy-conservation demand of electric railway, the present invention aim to provide a kind of take wind-light complementary system as main power source, batteries directly is the method for electrified railway power supply as stand-by power supply, and designed a whole set of power supply plan.Enable to solve connecing of particular section electrified railway power supply power supply from far-off regions and draw problem, suppress the negative phase-sequence problem of electric railway generation to the impact of electric power system, solve the phase-splitting problem of crossing of electric railway, help lend some impetus to simultaneously the application of new forms of energy in traction power supply.
Purpose of the present invention realizes by following means.
A kind of wind-photovoltaic complementary power supply system for traction power supply, consisted of by wind turbine generator, photovoltaic battery array, batteries, traction substation single-phase transformer, it is characterized in that, described wind and solar hybrid generating system adopts 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, boosts to 35KV by single-phase transformer, directly supplies with traction substation as the traction power supply power supply; Be provided with between the electric power outlet side of wind turbine generator and photovoltaic battery array and traction substation and gather single-phase inverter outlet side voltage and current and calculate, analyze and send control command according to the traction load of power supply section, the energy management unit of the meritorious output of regulating wind power unit, photovoltaic cell, batteries, described energy management unit will be controlled at for the wind and solar hybrid generating system of traction power supply under following four kinds of operating modes according to practical operation situation and move:
1). work as P 1>0 and P 1〉=P LThe time, be that air velocity transducer detects wind speed greater than starting wind speed, and the meritorious output of wind-powered electricity generation unit be can satisfy Δ t period supply arm load operation the time, wind-solar complementary type traction power supply power supply moves under operating mode 1 pattern, namely only by the wind turbine generator power supply, battery charging is to 90% of rated capacity;
2). work as P 1>0 and P 1<P LThe time, be that air velocity transducer detects wind speed greater than starting wind speed, when output can not be satisfied traction power supply arm load operation but the wind-powered electricity generation unit is gained merit, wind-solar complementary type traction power supply power supply moved under operating mode 2 patterns, namely start the mixed power generation pattern, by wind-powered electricity generation unit and photovoltaic cell complemental power-generation;
3). work as P 1=0 but P 2>0, be that air velocity transducer detects wind speed less than starting wind speed, when the wind-powered electricity generation unit is in stopped status, but when the meritorious output of photovoltaic generation can be satisfied traction power supply arm load operation, wind-solar complementary type traction power supply power supply moves under operating mode 3 patterns, namely by supplying power for photovoltaic cell, batteries is complementary powers;
4). work as P 1=0 and P 2=0 o'clock, when namely wind-solar complementary type traction power supply power supply was in calm unglazed special weather condition, batteries was discharged to 20% or startup stand-by power supply of rated capacity, to satisfy traction power supply arm load operation demand.
Adopt tractive power supply system of the present invention, have following advantage:
(1) wind and solar hybrid generating system that is used for traction power supply of the present invention's proposition is not incorporated into the power networks, 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 avoid the negative phase-sequence problem of electric railway generation on the impact of electric power system.
(2) wind and solar hybrid generating system that is used for traction power supply of the present invention's proposition is output as single-phase 50Hz interchange, directly as single phase poaer supply access traction substation, it is the traction load power supply that electric substation adopts single-phase transformer, efficiently solves the phase-splitting problem of crossing that traditional electrical gasification railway produces.
(3) wind and solar hybrid generating system that is used for traction power supply that proposes of the present invention can solve connecing of electric railway traction power supply from far-off regions nearby and draws problem, the on-site elimination that is conducive to simultaneously the northern area wind power resources promotes the exploitation of local wind resource.
(4) wind and solar hybrid generating system that is used for traction power supply that proposes of the present invention is simple in structure, the lower and easy realization of cost.
Description of drawings is as follows:
Fig. 1 is the wind and solar hybrid generating system application scheme schematic diagram for traction power supply.
Fig. 2 is wind light mutual complementing power generation cellular construction schematic diagram.
Fig. 3 is wind-solar complementary type traction power supply power supply single-phase inversion cellular construction schematic diagram.
Fig. 4 is wind-solar complementary type traction power supply power supply single phase power supply method schematic diagram.
Fig. 5 is wind-solar complementary type traction power supply power supply energy management system operating mode decision-making schematic diagram.
Fig. 6 is that the wind light mutual complementing EMS is controlled model structure figure.
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 6.The present invention will be further described below in conjunction with accompanying drawing:
As shown in Figure 1, the wind-photovoltaic complementary power supply system that is used for traction power supply, be made of several wind light mutual complementing power generations unit, energy management unit, traction substation single-phase transformer, system adopts 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, boosts to 35KV by single-phase transformer, directly supplies with traction substation as the traction power supply power supply; Be provided with between the electric power outlet side of wind light mutual complementing power generation unit and traction substation and gather single-phase inverter outlet side voltage and current and calculate, analyze and send control command, the energy management unit of the meritorious output of regulating wind power unit, photovoltaic cell, batteries according to the traction load of power supply section.
The wind light mutual complementing power generation unit comprises the wind turbine generator of permanent magnet direct-driving aerogenerator, wind-powered electricity generation unit motor side current transformer formation and is comprised of photoelectricity unit and batteries that photovoltaic battery array, single-phase inverter consist of; Wind turbine generator is connected with the photoelectricity unit and is connected with batteries.
As shown in Figure 2, each wind light mutual complementing power generation unit forms by permanent magnet direct-driving aerogenerator group, wind-powered electricity generation unit motor side current transformer, single-phase inverter, 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.
As shown in Figure 3, the single-phase inverter of wind light mutual complementing power generation unit is comprised of single-phase full bridge inverter circuit and single-phase transformer.In the single-phase full bridge inverter circuit, the signal of VT1 and VT2 is complementary, and the signal of VT3 and VT4 is complementary, and 1,4 brachium pontis and 2,3 brachium pontis rotation conductings are that single-phase 50Hz exchanges with direct current 1200V inversion, then boost to 35 kilovolts by single-phase transformer.
As shown in Figure 4, n wind light mutual complementing power generation unit composes in parallel single phase alternating current power supply by n single-phase inversion unit, directly accesses 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 accessed traction substation former limit, then is powered to single-phase load by the traction transformer of different wiring.
As shown in Figure 5, according to supply arm traction load situation, wind-solar complementary type traction power supply power supply can be divided into four kinds of operating mode operations.If this section locomotive is P at Δ t period internal consumption power L, wind energy turbine set power output within the Δ t period is P 1, photovoltaic cell power output within the Δ t period is P 2, Δ t arranges according to power supply section locomotive operation density and local prevailling wind wind regime.Four kinds of operating conditions are as follows:
1. work as P 1>0 and P 1〉=P LThe time, be that air velocity transducer detects wind speed greater than starting wind speed, and the meritorious output of wind-powered electricity generation unit be can satisfy Δ t period supply arm load operation the time, wind-solar complementary type traction power supply power supply moves under operating mode 1 pattern, namely only by the wind turbine generator power supply, battery charging is to 90% of rated capacity.
2. work as P 1>0 and P 1<P LThe time, be that air velocity transducer detects wind speed greater than starting wind speed, when output can not be satisfied traction power supply arm load operation but the wind-powered electricity generation unit is gained merit, wind-solar complementary type traction power supply power supply moved under operating mode 2 patterns, namely start the mixed power generation pattern, by wind-powered electricity generation unit and photovoltaic cell complemental power-generation.
3. work as P 1=0 but P 2>0; be that air velocity transducer detects wind speed less than starting wind speed; when the wind-powered electricity generation unit is in stopped status; but when the meritorious output of photovoltaic generation can be satisfied traction power supply arm load operation; wind-solar complementary type traction power supply power supply moves under operating mode 3 patterns; namely by supplying power for photovoltaic cell, batteries is complementary powers.
4. work as P 1=0 and P 2=0 o'clock, when namely wind-solar complementary type traction power supply power supply was in calm unglazed special weather condition, batteries was discharged to 20% or startup stand-by power supply of rated capacity, to satisfy traction power supply arm load operation demand.
Fig. 6 is in conjunction with shown in Figure 1, EMS monitoring module real-time detecting system access point voltage, frequency and power output, gain merit and idle calculating according to the data that gather, and the control command distribution is sent to each generator unit, the power stage of regulating wind power unit, photovoltaic cell, batteries, the output of adjusting Single-phase PWM Inverter, thus the permanent power of realizing wind and solar hybrid generating system is controlled and constant voltage control.The locomotive operation figure that EMS provides according to railway interests calculates the load condition of the traction power supply arm that supplies, and each typhoon group of motors, photovoltaic cell are optimized configuration, for system formulates rational operational plan.
Method of supplying power to provided by the invention directly accesses the traction substation primary side with the wind light mutual complementing single phase poaer supply, simplified the complexity of traction transformer, effectively avoided the negative phase-sequence problem of power supply section electric railway generation and crossed the phase-splitting problem, being conducive to simultaneously promote the application of regenerative resource in traction power supply.The wind and solar hybrid generating system that is used for traction power supply is simple in structure, the lower and easy realization of cost.

Claims (1)

1. wind-photovoltaic complementary power supply system that is used for traction power supply, be made of wind light mutual complementing power generation unit, single-phase inversion unit, energy management unit, traction substation single-phase transformer, described wind-photovoltaic complementary power supply system adopts 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, boosts to 35KV by single-phase transformer, directly supplies with traction substation and connects as the traction power supply power supply; Be provided with between the electric power outlet side of wind light mutual complementing power generation unit and traction substation and gather single-phase inverter outlet side voltage and current and calculate, analyze and send control command according to the traction load of power supply section, the energy management unit of the meritorious output of regulating wind power unit, photovoltaic cell, batteries, described energy management unit will be controlled at for the wind and solar hybrid generating system of traction power supply under following four kinds of operating modes according to practical operation situation and move, and be P at Δ t period internal consumption power L, wind energy turbine set power output within the Δ t period is P 1, photovoltaic cell power output within the Δ t period is P 2:
1). work as P 1>0 and P 1〉=P LThe time, be that air velocity transducer detects wind speed greater than starting wind speed, and the meritorious output of wind-powered electricity generation unit be can satisfy Δ t period supply arm load operation the time, wind-solar complementary type traction power supply power supply moves under operating mode 1 pattern, namely only by the wind turbine generator power supply, battery charging is to 90% of rated capacity;
2). work as P 1>0 and P 1<P LThe time, be that air velocity transducer detects wind speed greater than starting wind speed, when output can not be satisfied traction power supply arm load operation but the wind-powered electricity generation unit is gained merit, wind-solar complementary type traction power supply power supply moved under operating mode 2 patterns, namely start the mixed power generation pattern, by wind-powered electricity generation unit and photovoltaic cell complemental power-generation;
3). work as P 1=0 but P 20, be that air velocity transducer detects wind speed less than starting wind speed, when the wind-powered electricity generation unit is in stopped status, but when the meritorious output of photovoltaic generation can be satisfied traction power supply arm load operation, wind-solar complementary type traction power supply power supply moves under operating mode 3 patterns, namely by supplying power for photovoltaic cell, batteries is complementary powers;
4). work as P 1=0 and P 2=0 o'clock, when namely wind-solar complementary type traction power supply power supply was in calm unglazed special weather condition, batteries was discharged to 20% or startup stand-by power supply of rated capacity, to satisfy traction power supply arm load operation demand;
Described wind light mutual complementing power generation unit comprises permanent magnet direct-driving aerogenerator group PMSG, rectification circuit and the wind turbine generator of Boost circuit formation and photovoltaic generating system and the batteries that is made of photovoltaic battery array and Boost circuit forms; Wind turbine generator is connected with the photovoltaic generation unit and is connected with batteries; Described wind light mutual complementing power generation unit directly accesses the traction substation primary side as single phase poaer supply by single-phase inverter.
CN2011101955980A 2011-07-13 2011-07-13 Wind/solar hybrid power supply system for traction power supply Expired - Fee Related CN102280923B (en)

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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
CN104868498A (en) * 2015-06-05 2015-08-26 江苏同芯电气科技有限公司 Topological structure for wind-solar integrated large-power grid-connected converter system
CN106611963A (en) * 2016-07-14 2017-05-03 中国能源建设集团甘肃省电力设计院有限公司 Power supply system and power supply method for railways in desert areas based on wind-photovoltaic complementary power generation
CN106849060A (en) * 2017-02-10 2017-06-13 中广核太阳能开发有限公司 A kind of high-speed railway tractive power supply system and control method containing photo-voltaic power supply
CN106828123B (en) * 2017-02-10 2023-04-07 西南交通大学 High-speed railway traction power supply system with distributed photovoltaic power supply and control method
CN107317387A (en) * 2017-06-27 2017-11-03 中铁二院工程集团有限责任公司 A kind of depot of urban railway transit vehicles combines electric power system
CN107181273B (en) * 2017-07-05 2023-05-05 西南交通大学 Electrified railway power generation and supply device and control method thereof
CN107749637A (en) * 2017-10-17 2018-03-02 西南交通大学 A kind of provide multiple forms of energy to complement each other grid-connected system and control method applied to electric railway
CN108336727B (en) * 2018-01-23 2023-11-24 西南交通大学 New energy supply system for through traction power supply and control method
CN110299713B (en) * 2019-06-25 2022-04-29 西南交通大学 Three-phase voltage unbalance compensation method for traction power supply system considering wind power plant influence
CN114123319A (en) * 2021-11-18 2022-03-01 武汉奥锐通信技术有限公司 OPLC-based grid-connected power generation system

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CN101814769B (en) * 2010-03-08 2012-06-27 北京凯华网联新能源技术有限公司 Electricity supply system of wind and light commercial power complementary communication base station
CN102035246A (en) * 2010-12-02 2011-04-27 顾节经 Solar energy/wind energy hybrid power generation system

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