CN106849836B - A kind of control method of electric railway three-phase photovoltaic energy storage system - Google Patents
A kind of control method of electric railway three-phase photovoltaic energy storage system Download PDFInfo
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- CN106849836B CN106849836B CN201710138183.7A CN201710138183A CN106849836B CN 106849836 B CN106849836 B CN 106849836B CN 201710138183 A CN201710138183 A CN 201710138183A CN 106849836 B CN106849836 B CN 106849836B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S10/00—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power
- H02S10/20—Systems characterised by their energy storage means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The present invention discloses a kind of control method of electric railway three-phase photovoltaic energy storage system, by the operating status for detecting tractive power supply system and photovoltaic generating system in real time, dynamically distribute the charge-discharge electric power of energy-storage system, " peak load shifting " is carried out to photovoltaic electric energy, is realized " the generating power for their own use " of photovoltaic electric energy；Photovoltaic system is carried out abandoning light under extreme case and is rationed the power supply, avoids photovoltaic access rear haulage power supply system from sending power to electric system is counter, to make the access of photovoltaic not influence the safe and stable operation of tractive power supply system itself.The present invention is remarkably improved the digestion capability to photovoltaic electric energy, it can avoid tractive power supply system simultaneously and send power to electric system is counter, fundamentally solve the problems, such as that the Three-phase Power Flow being likely to occur when no energy storage photovoltaic generating system three-phase access tractive power supply system is not in the same direction.
Description
Technical field
The invention belongs to tractive power supply system technical fields, more particularly to a kind of electric railway three-phase photovoltaic energy storage system
The control method of system.
Background technology
Railway and photovoltaic generation are the two big fields that China currently greatly develops.By the end of the year 2015, China railways
Revenue kilometres have reached 12.1 ten thousand kilometers, are printed and distributed according to National Development and Reform Committee《Mid-long term railway network plan》, the railway network in China
150,000 kilometers will be reached in the year two thousand twenty, the big city of 80% or more covering, railway network scale reaches 17.5 ten thousand kilometers within 2025.Root
It is formulated according to China in 2007《Regenerative resource Long-and Medium-term Development is planned》, the solar power generation total capacity for arriving the year two thousand twenty China will
Reach 1,800,000 kWp, and with the fast development for carrying out photovoltaic power generation technology this year, this number is expected to reach 100,000 MWp.
The fast development of railway and photovoltaic not only contributes to improve for photovoltaic application is provided opportunity in railway territory
China consumes the accounting of new energy in the energy, while contributing to energy-saving and emission-reduction and the renewable energy utilization of railway territory, has
Good economic value and social value.
The access form that existing research accesses photovoltaic generation electric railway traction power supply system has carried out desk study,
Wherein photovoltaic generation three-phase access mode three characteristics of the middle term photovoltaic DC-to-AC converter, the high-adaptability of three-phase energy accumulation current converter, large capacity and
With certain advantage.But after the access of photovoltaic generation three-phase, certain negative effect can be generated to tractive power supply system：Traction is negative
Lotus is a kind of stronger load of asymmetry, and the output current three-phase symmetrical of three-phase photovoltaic inverter, this is easy for causing to transport
Three-phase Power Flow problem not in the same direction at the tie point of electric system and tractive power supply system during row, to electrical energy measurement, electric power
System call causes difficulty, or even endangers the safe and stable operation of electric system.
Invention content
To solve the above-mentioned problems, the adaptability of photovoltaic generation access tractive power supply system is improved, the present invention proposes one
The control method of kind electric railway three-phase photovoltaic energy storage system, by detecting tractive power supply system and photovoltaic generating system in real time
Operating status, dynamically distribute the charge-discharge electric power of energy-storage system, to photovoltaic electric energy carry out " peak load shifting ", realize photovoltaic electric
" generating power for their own use " of energy；Photovoltaic system is carried out abandoning light under extreme case and is rationed the power supply, avoid photovoltaic access rear haulage power supply system to
Electric system is counter to send power, to make the access of photovoltaic not influence the safe and stable operation of tractive power supply system itself.
In order to achieve the above objectives, the technical solution adopted by the present invention is：A kind of electric railway three-phase photovoltaic energy storage system
Control method, by detecting tractive power supply system, photovoltaic generating system and the operating status of energy-storage system in real time, to control
The charge-discharge electric power of energy-storage system and the operating status of photovoltaic generating system, including step：
S100 detects the amplitude and phase of the voltage and current of two supply arms of tractive power supply system, obtains two in real time
The voltage phasor U of supply armαAnd Uβ, and obtain the electric current phasor I of two supply armsαAnd Iβ；Detection tractive power supply system in real time
The amplitude and phase of high-pressure side three-phase voltage obtain on high-tension side three-phase voltage phasor Up、UqAnd Ur；Detection photovoltaic generation in real time
The output power P of systemPV；And the state-of-charge SOC of energy-storage system is detected in real time；
S200 utilizes the voltage phasor U of two supply armsαAnd UβWith electric current phasor IαAnd Iβ, calculate the real-time of traction load
Electric power, i.e. active-power PαAnd PβAnd reactive power QαAnd Qβ；
S300 utilizes the voltage phasor U of two supply armsαAnd UβWith electric current phasor IαAnd Iβ, on high-tension side three-phase voltage phase
Measure Up、UqAnd UrAnd the real-time electric power of traction load；Traction load is calculated in high-pressure side for the reality of three-phase electrical power system
When electric power, i.e. active-power Pp、PqAnd PrAnd reactive power Qp、QqAnd Qr；
S400, according to the real-time electric power of three-phase electrical power system, the output power and energy-storage system of photovoltaic generating system
State-of-charge judged, to control energy-storage system charge-discharge electric power dynamically distribute and photovoltaic generating system operation
State.
Further, in step S200, the real-time electric power of traction load is calculated, specific formula is：
Wherein, Iα *、Iβ *The conjugate complex number of two supply arm electric current phasors of tractive power supply system is indicated respectively.
Further, in step S300, real-time electricity consumption of the traction load in high-pressure side for three-phase electrical power system is calculated
Power, specific formula are：
Wherein, Pp、Pq、PrIndicate traction load on high-tension side three phases active power, Q respectivelyp、Qq、QrIt indicates to lead respectively
Draw load on high-tension side three phase reactive power, K indicates the no-load voltage ratio of tractive transformer, Iα*、Iβ* tractive power supply system is indicated respectively
The conjugate complex number of two supply arm electric current phasors.
Further, the step S400, including step：
Set the minimum state-of-charge SOC that energy-storage system allowsminWith highest state-of-charge SOCmax, set energy-storage system
Maximum discharge power PfmaxWith maximum charge power Pcmax；
Take the active power minimum value min [P in the real-time electric power of three-phase electrical power systemp,Pq,Pr]；
In order to realize " peak load shifting " of photovoltaic electric energy, and avoid to the anti-power transmission energy of electric system, to energy-storage system
Charge-discharge electric power dynamically distributes and the operation reserve of photovoltaic generating system follows following rules and judged：
1) as min [Pp,Pq,Pr]≥PPV/ 3 and SOC≤SOCminWhen setting up, control energy-storage system is stopped；
2) as min [Pp,Pq,Pr]≥PPV/ 3 set up, but SOC≤SOCminWhen invalid；Judge PPV+Pfmax≥Pα+PβIt is
No establishment；If so, then enable energy-storage system with Pα+Pβ-PPVPower discharge；If not, then enable energy-storage system with PfmaxWork(
Rate is discharged；
3) as min [Pp,Pq,Pr]≥PPV/ 3 is invalid, but SOC >=SOCmaxWhen establishment；Then photovoltaic generating system is enabled to export
Power is 3 × min [Pp,Pq,Pr], remaining PPV-3×min[Pp,Pq,Pr] photovoltaic electric energy abandons light and ration the power supply processing；
4) as min [Pp,Pq,Pr]≥PPV/ 3 is invalid, and SOC >=SOCmaxAlso when invalid；Judge Pα+Pβ-PPV≥
PcmaxIt is whether true；If so, then enable energy-storage system with PcmaxPower charging, remaining PPV-PcmaxPhotovoltaic electric energy abandons light limit
Electric treatment；If not, then enable energy-storage system with PcmaxPower charging, energy-storage system can dissolve whole photovoltaic electric energy.
Wherein, since the output current of three-phase photovoltaic inverter is symmetrical, the photovoltaic power of one third respectively shares
In each phase of three-phase electrical power system.
On the other hand, the present invention also provides a kind of electric railway three-phase photovoltaic energy storage systems, including traction power supply system
System, photovoltaic generating system and energy-storage system；
The photovoltaic generating system includes Photovoltaic array and three-phase photovoltaic inverter, and the Photovoltaic array output end is connected to
The DC side of three-phase photovoltaic inverter；The energy-storage system includes energy storage device and three-phase energy accumulation current converter, energy storage device connection
To the DC side of three-phase energy accumulation current converter；
The two-phase side of two-phase-triphase step-down transformer, two-phase-three are connected on two supply arms of the tractive power supply system
The third port of phase step-down transformer two-phase side is connected to rail, three-phase side and the three-phase photovoltaic of two-phase-triphase step-down transformer
The exchange side of inverter and the exchange side of three-phase energy accumulation current converter connect jointly；Two supply arms of tractive power supply system pass through three
Phase-two-phase tractive transformer is connected to three-phase electrical power system.
Further, further including central controller, the three-phase photovoltaic inverter, three-phase energy accumulation current converter, two-phase-in system
The control port of triphase step-down transformer and three-phase-two-phase tractive transformer is respectively connected to central controller；By central controller, realize
The comprehensive automation of system controls, and realizes the automatic distribution of energy.
Further, being provided with voltage detector and current detecting on two supply arms of the tractive power supply system
Device；It is provided with power-sensing circuit in the three-phase photovoltaic inverter, SOC inspections are provided in the three-phase energy accumulation current converter
Slowdown monitoring circuit；The voltage detector, current detector, power-sensing circuit and SOC detection circuits signal output end be all connected with
To central controller；The real-time detection of all parameters of realization system.
Further, the energy storage device is the energy storage of contracting air, flywheel energy storage, batteries to store energy, superconducting energy storage or super
Grade capacitive energy storage；It can be suitable for various energy storage devices.
Using the advantageous effect of the technical program：
1) photovoltaic generating system is used cooperatively with energy-storage system, significantly improves the digestion capability to photovoltaic electric energy；
2) the rationally charge and discharge of control energy-storage system are carried out abandoning light under extreme case and be rationed the power supply, avoid to photovoltaic generating system
Tractive power supply system send power to electric system is counter, fundamentally solves the Three-phase Power Flow being likely to occur when no energy-storage system not
Problem in the same direction；
3) on the basis of the technical program, by distributing the capacity of energy-storage system rationally, it can further improve traction and supply
The economy of electric system.
Description of the drawings
Fig. 1 is a kind of control method flow diagram of electric railway three-phase photovoltaic energy storage system of the present invention；
Fig. 2 shows for a kind of control method flow of electric railway three-phase photovoltaic energy storage system in optimal enforcement example of the present invention
It is intended to；
Fig. 3 is a kind of structural schematic diagram of electric railway three-phase photovoltaic energy storage system of the present invention；
Wherein, 11 be electric system, and 12 be three-phase-two-phase tractive transformer, and 13 be tractive power supply system α supply arms, 14
It is rail for tractive power supply system β supply arms, 15；21 be two-phase-triphase step-down transformer, and 22 be photovoltaic array, and 23 be three-phase
Photovoltaic DC-to-AC converter, 24 be energy storage device, and 25 be three-phase energy accumulation current converter.
Specific implementation mode
To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention is made into one below in conjunction with the accompanying drawings
Step illustrates.
As shown in Figure 1, the present invention proposes a kind of control method of electric railway three-phase photovoltaic energy storage system, pass through reality
When detection tractive power supply system, photovoltaic generating system and energy-storage system operating status, to control the charge and discharge of energy-storage system
The operating status of power and photovoltaic generating system, including step：
S100 detects the amplitude and phase of the voltage and current of two supply arms of tractive power supply system, obtains two in real time
The voltage phasor U of supply armαAnd Uβ, and obtain the electric current phasor I of two supply armsαAnd Iβ；Detection tractive power supply system in real time
The amplitude and phase of high-pressure side three-phase voltage obtain on high-tension side three-phase voltage phasor Up、UqAnd Ur；Detection photovoltaic generation in real time
The output power P of systemPV；And the state-of-charge SOC of energy-storage system is detected in real time；
S200 utilizes the voltage phasor U of two supply armsαAnd UβWith electric current phasor IαAnd Iβ, calculate the real-time of traction load
Electric power, i.e. active-power PαAnd PβAnd reactive power QαAnd Qβ；
S300 utilizes the voltage phasor U of two supply armsαAnd UβWith electric current phasor IαAnd Iβ, on high-tension side three-phase voltage phase
Measure Up、UqAnd UrAnd the real-time electric power of traction load；Traction load is calculated in high-pressure side for three-phase electrical power system 11
Real-time electric power, i.e. active-power Pp、PqAnd PrAnd reactive power Qp、QqAnd Qr；
S400, according to the real-time electric power of three-phase electrical power system 11, the output power of photovoltaic generating system and energy storage system
The state-of-charge of system is judged that the charge-discharge electric power to control energy-storage system dynamically distributes and the fortune of photovoltaic generating system
Row state.
It is shown in Figure 2 in optimal enforcement example, two supply arms of note be α 13, β 14,11 three-phase of electric system be A, B, C,
The control method is further illustrated so that the opposite A phases of α take electricity, the opposite A phases of β to take electricity as an example.
Amplitude, phase and the tractive power supply system of the voltage of detection two supply arms of tractive power supply system, electric current in real time
Amplitude, the phase of high-pressure side three-phase voltage.Phasor Uα、UβIndicate the voltage of two supply arms, phasor Iα、IβIndicate two power supplies
The electric current of arm, phasor UA、UB、UCIndicate on high-tension side three-phase voltage.
Calculate the real-time electric power of traction load：
Wherein P, Q indicate active power and reactive power, I respectivelyα*、Iβ* the conjugate complex number of supply arm electric current phasor is indicated.
Calculate real-time electric power of the traction load in high-pressure side for three-phase electrical power system 11：
Wherein K indicates the no-load voltage ratio of tractive transformer.
The output power for detecting photovoltaic generating system in real time simultaneously, is denoted as PPV.Due to the output of three-phase photovoltaic inverter 23
Current-symmetrical, therefore respectively there is the photovoltaic power of one third to be split in each phase of three-phase electrical power system 11.In order to realize photovoltaic
" peak load shifting " of electric energy, and avoid, to 11 anti-power transmission energy of electric system, dynamically distributing the charge-discharge electric power of energy-storage system
And the operation reserve of photovoltaic generating system follows following rules, wherein min [PA,PB,PC] indicate that three-phase electrical power system 11 is active
The minimum value of power, SOC are the state-of-charge of energy-storage system, SOCmin、SOCmaxIt is charged for the minimum of energy-storage system permission, highest
State, PfmaxFor the maximum discharge power of energy-storage system, PcmaxFor the maximum charge power of energy-storage system.
1) as min [PA,PB,PC]≥PPV/ 3 and SOC≤SOCminWhen setting up, energy-storage system does not work；
2) as min [PA,PB,PC]≥PPV/ 3 set up, but SOC≤SOCminWhen invalid, P is judgedPV+Pfmax≥Pα+PβIt is
No establishment, if so, energy-storage system is with Pα+Pβ-PPVPower discharge, if it is not, then energy-storage system is with PfmaxPower discharge；
3) as min [PA,PB,PC]≥PPV/ 3 is invalid, but SOC >=SOCmaxWhen establishment, photovoltaic electric energy can not fully be disappeared
It receives, it is 3 × min [P to enable photovoltaic power generation system output powerA,PB,PC], remaining PPV-3×min[PA,PB,PC] photovoltaic electric energy abandons
Light is rationed the power supply processing；
4) as min [PA,PB,PC]≥PPV/ 3 is invalid, and SOC >=SOCmaxAlso when invalid, judge Pα+Pβ-PPV≥
PcmaxWhether true, if so, energy-storage system can not dissolve whole photovoltaic electric energy, then energy-storage system is with PcmaxPower charging, remaining
PPV-PcmaxPhotovoltaic electric energy abandons light and rations the power supply processing, if it is not, energy-storage system can dissolve whole photovoltaic electric energy, then energy-storage system with
PcmaxPower charging.
The realization of inventive method is based on identical inventive concept, as shown in figure 3, the present invention also provides a kind of electrifications
Railway three-phase photovoltaic energy storage system, including tractive power supply system, photovoltaic generating system and energy-storage system；
The photovoltaic generating system includes photovoltaic array 22 and three-phase photovoltaic inverter 23,22 output end of the photovoltaic array
It is connected to the DC side of three-phase photovoltaic inverter 23；The energy-storage system includes energy storage device 24 and three-phase energy accumulation current converter 25,
Energy storage device 24 is connected to the DC side of three-phase energy accumulation current converter 25；
The two-phase side of two-phase-triphase step-down transformer 21, two-phase-are connected on two supply arms of the tractive power supply system
The third port of 21 two-phase side of triphase step-down transformer is connected to rail 15, the three-phase side of two-phase-triphase step-down transformer 21 with
The exchange side of three-phase photovoltaic inverter 23 and the exchange side of three-phase energy accumulation current converter 25 connect jointly；Two of tractive power supply system
Supply arm is connected to three-phase electrical power system 11 by three-phase-two-phase tractive transformer 12.
The three-phase voltage of three-phase electrical power system 11 is transformed to two-phase voltage to electrification by three-phase-two-phase tractive transformer 12
Railway power supply, three ports of secondary side of three-phase-two-phase tractive transformer 12 be separately connected tractive power supply system α supply arms 13,
Tractive power supply system β supply arms 14 and rail 15.
In electric railway three-phase photovoltaic energy storage system, two-phase-triphase step-down transformer 21 is by tractive power supply system
Two-phase voltage is transformed to symmetrical three-phase voltage, to be provided suitably to three-phase photovoltaic inverter 23, three-phase energy accumulation current converter 25
Voltage makes its normal work.
Photovoltaic module forms photovoltaic array 22 by connection in series-parallel；The boosting of the realization photovoltaic electric energy of three-phase photovoltaic inverter 23,
Maximal power tracing and inversion.
Energy storage device 24 is that by the storage of electric energy and a kind of equipment of release function, typical form include but
It is not limited only to compressed-air energy storage, flywheel energy storage, batteries to store energy, superconducting energy storage, super capacitor energy-storage etc..
Three-phase energy accumulation current converter 25 can be according to the charge or discharge of instruction control energy storage device 24.Three-phase photovoltaic inverter
23 and three-phase energy accumulation current converter 25 exchange side be connected in parallel, to realize " peak clipping of the energy-storage system to photovoltaic generating system
Fill valley ".
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (4)
1. a kind of control method of electric railway three-phase photovoltaic energy storage system, which is characterized in that supplied by detecting traction in real time
The operating status of electric system, photovoltaic generating system and energy-storage system, to control the charge-discharge electric power and photovoltaic of energy-storage system
The operating status of electricity generation system, including step：
S100 detects the amplitude and phase of the voltage and current of two supply arms of tractive power supply system in real time, obtains two power supplies
The voltage phasor U of armαAnd Uβ, and obtain the electric current phasor I of two supply armsαAnd Iβ；Detection tractive power supply system high pressure in real time
The amplitude and phase of side three-phase voltage obtain on high-tension side three-phase voltage phasor Up、UqAnd Ur；Detection photovoltaic generating system in real time
Output power PPV；And the state-of-charge SOC of energy-storage system is detected in real time；
S200 utilizes the voltage phasor U of two supply armsαAnd UβWith electric current phasor IαAnd Iβ, calculate the real-time electricity consumption of traction load
Power, i.e. active-power PαAnd PβAnd reactive power QαAnd Qβ；
S300 utilizes the voltage phasor U of two supply armsαAnd UβWith electric current phasor IαAnd Iβ, on high-tension side three-phase voltage phasor Up、
UqAnd UrAnd the real-time electric power of traction load；Traction load is calculated in high-pressure side for the real-time of three-phase electrical power system (11)
Electric power, i.e. active-power Pp、PqAnd PrAnd reactive power Qp、QqAnd Qr；
S400, according to the real-time electric power of three-phase electrical power system (11), the output power and energy-storage system of photovoltaic generating system
State-of-charge judged, to control energy-storage system charge-discharge electric power dynamically distribute and photovoltaic generating system operation
State.
2. a kind of control method of electric railway three-phase photovoltaic energy storage system according to claim 1, which is characterized in that
In step S200, the real-time electric power of traction load is calculated, specific formula is：
Pα+jQα=Uα·Iα *
Pβ+jQβ=Uβ·Iβ *；
Wherein, Iα *、Iβ *The conjugate complex number of two supply arm electric current phasors of tractive power supply system is indicated respectively.
3. a kind of control method of electric railway three-phase photovoltaic energy storage system according to claim 2, which is characterized in that
In step S300, traction load is calculated in high-pressure side for the real-time electric power of three-phase electrical power system (11), specific formula is：
Wherein, Pp、Pq、PrIndicate traction load on high-tension side three phases active power, Q respectivelyp、Qq、QrIndicate that traction is negative respectively
Lotus indicates the no-load voltage ratio of tractive transformer, I on high-tension side three phase reactive power, Kα *、Iβ *Tractive power supply system two is indicated respectively
The conjugate complex number of supply arm electric current phasor.
4. a kind of control method of electric railway three-phase photovoltaic energy storage system according to claim 1 or 3, feature exist
In, the step S400, including step：
Set the minimum state-of-charge SOC that energy-storage system allowsminWith highest state-of-charge SOCmax, set the maximum of energy-storage system
Discharge power PfmaxWith maximum charge power Pcmax；
Take the active power minimum value min [P in the real-time electric power of three-phase electrical power system (11)p,Pq,Pr]；
Judged：
1) as min [Pp,Pq,Pr]≥PPV/ 3 and SOC≤SOCminWhen setting up, control energy-storage system is stopped；
2) as min [Pp,Pq,Pr]≥PPV/ 3 set up, but SOC≤SOCminWhen invalid；Judge PPV+Pfmax≥Pα+PβWhether at
It is vertical；If so, then enable energy-storage system with Pα+Pβ-PPVPower discharge；If not, then enable energy-storage system with PfmaxPower put
Electricity；
3) as min [Pp,Pq,Pr]≥PPV/ 3 is invalid, but SOC >=SOCmaxWhen establishment；Then enable photovoltaic power generation system output power
For 3 × min [Pp,Pq,Pr], remaining PPV-3×min[Pp,Pq,Pr] photovoltaic electric energy abandons light and ration the power supply processing；
4) as min [Pp,Pq,Pr]≥PPV/ 3 is invalid, and SOC >=SOCmaxAlso when invalid；Judge Pα+Pβ-PPV≥PcmaxWhether
It sets up；If so, then enable energy-storage system with PcmaxPower charging, remaining PPV-PcmaxPhotovoltaic electric energy abandons light and rations the power supply processing；
If not, then enable energy-storage system with PcmaxPower charging.
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| 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 |
| CN107658868A (en) * | 2017-10-17 | 2018-02-02 | 西南交通大学 | A kind of electric railway three-phase photovoltaic DC side energy-storage system and its control method |
| CN107492902B (en) * | 2017-10-21 | 2023-06-13 | 盾石磁能科技有限责任公司 | Railway traction power supply system based on flywheel energy storage device and method for improving power quality of railway traction power supply system |
| 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 |
| CN108365634B (en) * | 2018-04-23 | 2023-07-28 | 西南交通大学 | Railway photovoltaic energy storage system for recovering regenerative braking energy and control method |
| CN108390412B (en) * | 2018-04-23 | 2023-07-28 | 西南交通大学 | Traction photovoltaic power generation system for braking energy recovery and control method |
| CN110190628B (en) * | 2019-06-12 | 2022-04-15 | 西南交通大学 | Complex line full-parallel AT traction power supply system and method based on comprehensive energy |
| CN111725822B (en) * | 2020-07-17 | 2022-02-08 | 华北电力大学 | Photovoltaic power generation split-phase control method for power supply system and photovoltaic traction power supply system |
| CN113013924A (en) * | 2021-03-15 | 2021-06-22 | 西南交通大学 | Traction power supply system connected with new energy power generation unit |
| CN115000995B (en) * | 2022-04-15 | 2023-01-24 | 西南交通大学 | Traction power supply active power communication system and control method thereof |
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