CN206977054U - A kind of electric railway energy-storage power supplying apparatus - Google Patents
A kind of electric railway energy-storage power supplying apparatus Download PDFInfo
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- CN206977054U CN206977054U CN201720808461.0U CN201720808461U CN206977054U CN 206977054 U CN206977054 U CN 206977054U CN 201720808461 U CN201720808461 U CN 201720808461U CN 206977054 U CN206977054 U CN 206977054U
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Abstract
The utility model provides a kind of electric railway energy-storage power supplying apparatus, is related to electric railway traction power supply field.Draw inlet wire connection traction bus；Draw bus and connect Traction networks to train power supply through feeder line；Straight current transformer AC port is handed in coupling transformer primary side connection traction bus and ground, secondary side connection；Straight current transformer DC port is handed over to be connected with accumulator；The control terminal of measurement and control unit connection voltage transformer, the measurement end of current transformer and the straight current transformer of friendship.Using load peak clipping as target, a reference value >=load average is selected；The maximum at the peak of the peak power of accumulator=in the past, the area at the maximum peak of area of the capacity of accumulator=in the past；When traction load power ＜ a reference values, order hands over straight current transformer to be in rectification operating mode, to charging accumulator；When traction load power ＞ a reference values, order hands over straight current transformer to be in inversion operating mode, accumulator is discharged, and the alternating current feed-in after inversion is drawn into bus.Negative phase-sequence is powered and administered for electric railway peak clipping.
Description
Technical field
Electric railway traction power supply field is the utility model is related to, more particularly to electrization railway draught load peak clipping is filled out
The management of paddy and control technology.
Background technology
Peak load shifting is the important measure of power system load management, and for power network, peak clipping, which is advantageous to improve, to be sent out defeated
Transformer utilization rate, equipment dilatation, update cost are saved, reduce power supply cost, for general user, peak can be utilized
Paddy price difference obtains the economic benefit for reducing the electricity charge.Energy-storage system possesses the dual-use function of electrical power storage and release, that is, has to negative
Lotus peak clipping and the double action of Fill valley, wherein battery energy storage system, super capacitor energy-storage system and its mixed energy storage system have
Original advantage, irreplaceable, great function is played in actual applications, and playing increasing effect.
Electric railway belongs to large industrial user, and has distinguishing feature, such as traction load fluctuation acutely, traction load work(
Rate peak value is a key：It not only technically causes the power quality problem based on negative phase-sequence, also economically directly concerns
User's benefit, because load peak takes closely related, iron with main transformer capacity charging and excess meter in two-part rate system price
Road user will pay additional cost.Therefore peak clipping-reduction load peak has Technological Economy and excellent chance：Both can administer
Negative phase-sequence, harmful effect is reduced, can obtain benefit in two-part rate system price is performed again, i.e., or reduction maximum demand obtains effect
Benefit, or reduce main transformer capacity and then reduce fixed capacity charge to obtain benefit.
Chinese patent discloses " electric railway traction power supply energy storage device and its method (201410002241.X) ", its
Purpose is " fully recovery locomotive feedback braking electric energy, there is provided the capacity usage ratio of tractive power supply system, and reduce tractive transformer
Installed capacity and charging capacity, it is cost-effective." still, the problem of technical scheme is present is：(1) in watt current Ip ＜ 0
Incorrect situation be present in the criterion of Shi Jinhang energy storage (see its claim 5 and accompanying drawing 5).Because Electric braking is not every
What individual supply arm all occurred.Such as Beijing-Shanghai express railway, all fronts 1318km, 24 stations, 27 electric substations's (54 supply arms), average station
Spacing (about 55km) is braked much larger than the length (about 24.4km) of average supply arm because normal condition Train is (electric)
Situation is stopped in generation AT STATION, it is clear that because very big without the probability of the supply arm at station, then, electric braking does not occur
Probability is very high, or even if occur braking but its regenerating power by colleague's tractor-trailer train absorb and it is equivalent show as traction working condition,
Do not have to brake regenerative scenario if the electric substation of Guzhen, now this criterion would not occur；Furtherly, even if electrically making
Dynamic power is not absorbed by colleague's train, returns it into power network and is increased without any equipment, be it is most direct, most economical,
It is that energy-saving and emission-reduction advocate encouragement (just as family's photovoltaic generation) by country, the patent specially sets energy storage device in work(
It is also what is be not necessarily to that energy storage is carried out during electric current Ip ＜ 0.(2) patent uses " total current Is＞ connects the specified of supply arm
Electric current Ie" the criterion method of (see its claim 7) is also incorrect.Again by taking Beijing-Shanghai express railway as an example, each traction substation
Operation main transformer (specified) capacity be 100 (2 × 50) MVA, and peak power only has less than 70MVA, according to the patent criterion
Just only paddy does not have peak, and peak clipping operating mode never occurs, and its energy storage device just never may work.Even if All other routes
On, it is same because the supply arm that electric braking does not occur be present, then, now because of the " storage that the criterions of watt current Ip ＜ 0 " obtain
Can=0, in the event of " total current Is＞ connects the rated current I of supply arme" situation, also not can be used for peak clipping
Electric power.In fact, the rated current I of corresponding supply armeTractive transformer installed capacity be the design phase determine, one
Through determining, i.e., unrelated with actual traction load, i.e. tractive transformer either underload or overload, It dones't help the situation.
Therefore " the total current Is＞ connects the rated current I of supply arme" inadvisable.In a word, there is energy storage with cutting in the technical scheme
Peak operational failure situation, now " installed capacity and charging capacity of tractive transformer are reduced, cost-effective " and also just not known where to begin,
Can not realize full working scope, real-time peak load shifting optimizes.
The importance on Technological Economy of electrization railway draught load peak load shifting is noticed, and more in method
Pay attention to the characteristics of electric railway service chart is using day as unit, that is, have fixed, accurately periodicity, therefore can therefrom extract
The statistical value of meaning is studied, utilized.Technical problems to be solved are now：How according to the characteristics of traction load, pass through
Special Equipment and method, realize and optimize peak clipping in real time, reduce transformer capacity or maximum demand, obtain optimum economic benefit,
Administer negative phase-sequence, improving environment performance simultaneously.
Utility model content
The purpose of this utility model is to provide a kind of electric railway energy-storage power supplying apparatus, and it is negative that it can efficiently solve traction
Lotus optimizes the technical problem of the equipment of peak clipping in real time, to reduce main transformer capacity or maximum demand, obtains optimal economic effect
Benefit, while negative phase-sequence is administered, improving environment performance.
The purpose of this utility model is achieved through the following technical solutions：A kind of electric railway energy storage for power supply dress
Put, including coupling transformer, friendship straight current transformer, voltage transformer, current transformer and measurement and control unit；Draw inlet wire connection traction
Bus；Draw bus and connect Traction networks to train power supply through feeder line；Voltage measuring transformer draws Bus Voltage；Electric current is mutual
Sensor measures the traction load of feeder line；The friendship of straight current transformer is handed in coupling transformer primary side connection traction bus and ground, secondary side connection
Flow port；The DC port of straight current transformer is handed over to be connected with accumulator；The measurement end of voltage transformer, the measurement end of current transformer
Measurement and control unit input interface is connected, measurement and control unit output interface is with handing over the control terminal of straight current transformer to be connected.
The purpose of this utility model is realized by following control method：Measurement and control unit is through voltage transformer and electric current
Transformer obtains traction load power, records traction load power curve under nominal situation in the past, calculates its average, statistics is in the past
Maximum；Using load peak clipping as target, selection：Target, selection：Average≤a reference value ＜ maximums；Higher than the load of a reference value
Power curve is peak, and the load power curve less than a reference value is paddy；The maximum at the peak of the peak power (kW) of accumulator=in the past
It is worth (kW), the area (kWh) at the maximum peak of area of the capacity (kWh) of accumulator=in the past；When traction load power ＜ a reference values
When, measurement and control unit control hands over straight current transformer rectification to charging accumulator, and now a reference value of the power of rectification charging=now is with leading
Draw the difference of load power；When traction load power ＞ a reference values, straight current transformer inversion is handed in measurement and control unit control, puts accumulator
Electricity, bus is drawn by the alternating current feed-in after inversion, power=now traction load power and a reference value of inversion of now discharging
Difference；When traction load power=a reference value, measurement and control unit control hands over straight current transformer standby.
It is frequent in view of distinguishing feature of the traction load fluctuation with big ups and downs, peak valley alternating, it is desirable to which that accumulator has
Higher charge and discharge cycles number, to ensure longer service life.Therefore accumulator should pay the utmost attention to ultracapacitor.
Operation principle of the present utility model is：Electrization railway draught load fluctuation is violent, many technologies and economic problems
All occur along with traction load peak value：Economically, load peak and the main transformer capacity charging in row two-part rate system price
Take with excess meter it is closely related, peak clipping-reduction load peak can reduce the electricity charge, obtain economic benefit, i.e., or reduction
Maximum demand obtains benefit, or reduces main transformer capacity and then reduce fixed capacity charge to obtain benefit；Technically, bear
Lotus peak value causes power quality problem and received much concern, for example, due to the electric energy matter based on the Voltage unbalance caused by the negative phase-sequence
Outstanding problem is measured, two limit values of voltage unbalance factor are (uneven see the qualities of power supply of GB/T15543-2008 three-phase voltage in national standard
Weighing apparatus) be exactly to be formulated respectively for load peak and 95% maximum probability value, therefore peak clipping-reduction load peak while can be with
Administer negative phase-sequence, improving environment performance；Meanwhile electric railway service chart, in units of day, periodicity is extremely strong, in the past nominal situation
The average of lower traction load has preferable stability and accuracy；Traction load power curve under nominal situation in the past is recorded,
Its average is calculated, counts maximum in the past；Selection：Average≤a reference value ＜ maximums；Definition：More than the load power of a reference value
Curve is peak, and the load power curve less than or equal to a reference value is paddy；In specified time period, when a reference value=average, own
The integration (area) of integration (area)=all paddy at peak, when a reference value is more than average, integration (area) the ＜ institutes at all peaks
There is the integration (area) of paddy；The maximum at the peak of the peak power of accumulator=in the past, select the area of the capacity of accumulator=in the past
The area at maximum peak；Traction load power and a reference value contrast can in real time be controlled to the discharge and recharge operating mode of accumulator, realized
Real-time peak load shifting；Compared to average, a reference value is bigger, and the quantity at peak is fewer, and discharge and recharge number is fewer, capacity of accumulator
Just smaller, investment is also fewer, but the effect of peak clipping is also just smaller, and electricity charge reduction is also fewer, and vice versa；Therefore a reference value is passed through
Selection can seek a Technological Economy preferred plan.
Compared with prior art, the beneficial effects of the utility model are：
First, electric railway service chart is in units of day, periodically extremely strong, in the past under nominal situation traction load average
There is preferable stability and accuracy with a reference value more than average, can be realized as benchmark with minimum capacity of accumulator
Real-time peak clipping.
2nd, using peak clipping as target, main transformer capacity or maximum demand can be reduced by the selection of a reference value, obtained most
Good economic benefit, while negative phase-sequence is administered, improving environment performance.
3rd, advanced technology, it is easy to implement.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model embodiment.
Fig. 2 is the peak clipping process schematic of the utility model embodiment.
Embodiment
Embodiment
The utility model is described further below in conjunction with the accompanying drawings：
Fig. 1 shows that a kind of embodiment of the present utility model is：A kind of electric railway energy-storage power supplying apparatus, bag
Include coupling transformer 1, hand over straight current transformer 2, accumulator 3, voltage transformer 4, current transformer 5 and measurement and control unit 6；Led with high ferro
Exemplified by drawing electric substation, wherein single-phase wiring main transformer secondary side draws traction inlet wire 7, the traction connection traction bus 8 of inlet wire 7；Lead
Draw bus and connect Traction networks to train power supply through feeder line 9；The measurement traction voltage-to-ground of bus 8 of voltage transformer 5；Current transformer
The traction load of 5 measurement feeder lines 9；The friendship of straight current transformer 2 is handed in the primary side of coupling transformer 1 connection traction bus 8 and ground, secondary side connection
Flow port；The DC port of straight current transformer 2 is handed over to be connected with accumulator 3；The survey of the measurement end, current transformer 5 of voltage transformer 4
The end connection input interface of measurement and control unit 6 is measured, the output interface of measurement and control unit 6 is with handing over the control terminal of straight current transformer 2 to be connected.
Measurement and control unit 6 obtains traction load power through the summation current transformer 5 of voltage transformer 4, and (such as 7 days) just in the past for record
Traction load power curve under normal operating mode, calculates its average, counts the maximum of (such as 7 days) traction load in the past；Cut with load
Peak is target, selection：Average≤a reference value ＜ maximums；Load power curve higher than a reference value is peak, less than a reference value
Load power curve is paddy；The maximum at the peak of the peak power of accumulator 3=in the past, the area of the capacity of accumulator 3=in the past is most
The area at big peak；Time t step-length △ (s) are taken, when moment t traction load power ＜ a reference values, the control of measurement and control unit 6 is handed over
The straight rectification of current transformer 2 is charged to accumulator 3, now a reference value and the difference of traction load power of the power of rectification charging=now；
When traction load power ＞ a reference values, the straight inversion of current transformer 2 is handed in the control of measurement and control unit 6, accumulator 3 is discharged, after inversion
Alternating current feed-in traction bus 8, the difference of traction load power and a reference value of power=now for inversion of now discharging；Work as traction
During load power=a reference value, the control of measurement and control unit 6 hands over straight current transformer 2 standby；So circulated in units of day.
Fig. 2 is the peak clipping process schematic of embodiment, and curve 10 is the actual measurement load power of actual feeder line 9 in figure, positive
Represent traction (electricity consumption) operating mode, negative expression braking regeneration (generating) operating mode, abscissa min, ordinate MW.Record is in the past
Traction load power curve under nominal situation, calculate its average 11；The load power curve of a period (1h) is selected in figure, with
Load peak clipping is target, selects the ＞ averages 11 of 13 ＞ a reference values of a reference value 12；Load power curve higher than a reference value is peak, low
In the load power curve of a reference value be paddy；The maximum at the peak of the peak power of accumulator 3=in the past, the capacity of accumulator 3=
In the past the area at the maximum peak of area；When traction load power ＜ a reference values, the straight rectification of current transformer 2 is handed in the control of measurement and control unit 6
Charged to accumulator 3, now a reference value and the difference of traction load power of the power of rectification charging=now；When traction load power
During ＞ a reference values, the straight inversion of current transformer 2 is handed in the control of measurement and control unit 6, accumulator 3 is discharged, the alternating current feed-in after inversion is led
Draw bus 8, the difference of traction load power and a reference value of power=now for inversion of now discharging；When traction load power=benchmark
During value, the control of measurement and control unit 6 hands over straight current transformer 2 standby.
Obviously, traction load power and a reference value contrast can in real time be controlled to the discharge and recharge operating mode of accumulator 3, realized real
When peak load shifting；A reference value is bigger, such as selects a reference value 13 to be more than a reference value 12, the quantity at peak is fewer, and discharge and recharge number is got over
Few, the capacity of accumulator 3 is also just smaller, and investment is also just smaller, but peak clipping ability is weaker, and electricity charge reduction is fewer, and vice versa；Therefore
One Technological Economy preferred plan can be sought by the selection of a reference value.
It was found from operation principle, the electric railway energy-storage power supplying apparatus and its control method and average, a reference value,
The definition such as peak valley are equally applicable for including regeneration regime i.e. traction load power ＜ 0 situation.
It is frequent in view of distinguishing feature of the traction load fluctuation with big ups and downs, peak valley alternating, it is desirable to which that accumulator 3 has
Higher charge and discharge cycles number, to ensure longer service life.Therefore the device of energy storage 3 should pay the utmost attention to ultracapacitor.
Claims (1)
1. a kind of electric railway energy-storage power supplying apparatus, including coupling transformer (1), the straight current transformer (2) of friendship, voltage transformer
(4), current transformer (5)；Draw inlet wire (7) connection traction bus (8)；Traction bus (8) is given through feeder line (9) connection Traction networks
Train power supply；Voltage transformer (4) measurement traction bus (8) voltage-to-ground；The traction of current transformer (5) measurement feeder line (9)
Load, it is characterised in that:Straight current transformer (2) is handed in coupling transformer (1) primary side connection traction bus (8) and ground, secondary side connection
AC port；The DC port of straight current transformer (2) is handed over to be connected with accumulator (3)；The measurement end of voltage transformer (4), electric current are mutual
The input interface of the measurement end connection measurement and control unit (6) of sensor (5), the output interface of measurement and control unit (6) is with handing over straight current transformer (2)
Control terminal be connected.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720808461.0U CN206977054U (en) | 2017-07-05 | 2017-07-05 | A kind of electric railway energy-storage power supplying apparatus |
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| CN201720808461.0U CN206977054U (en) | 2017-07-05 | 2017-07-05 | A kind of electric railway energy-storage power supplying apparatus |
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| CN206977054U true CN206977054U (en) | 2018-02-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107294102A (en) * | 2017-07-05 | 2017-10-24 | 西南交通大学 | A kind of electric railway energy-storage power supplying apparatus and its control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107294102A (en) * | 2017-07-05 | 2017-10-24 | 西南交通大学 | A kind of electric railway energy-storage power supplying apparatus and its control method |
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