CN105790274B - A kind of perforation electric power system inverter type traction substation load flow regulation device and its regulation and control method - Google Patents
A kind of perforation electric power system inverter type traction substation load flow regulation device and its regulation and control method Download PDFInfo
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- CN105790274B CN105790274B CN201610131765.8A CN201610131765A CN105790274B CN 105790274 B CN105790274 B CN 105790274B CN 201610131765 A CN201610131765 A CN 201610131765A CN 105790274 B CN105790274 B CN 105790274B
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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
- H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
- H02J3/06—Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
Abstract
The present invention provides a kind of perforation electric power system inverter type traction substation load flow regulation devices and methods therefors, are related to attached wires of AC electrified railway for electrical domain.Electric railway including a transformer type traction substation and several inverter type traction substation compositions penetrates through electric power system.The tractive feeder current transformer of regulation device input terminal connection inverter type electric substation and traction bus-bar potential transformer, the tractive feeder current transformer of transformer type electric substation and traction bus-bar potential transformer, the AC-DC-AC converter control terminal of output terminal connection inverter type electric substation are connected by optical fiber.Regulation and control method is：Using the electric current, voltage and power data of transformer type electric substation as reference, in traction busbar voltage allowed band, adjustment inverter type electric substation power makes it approach the target of train load on pro rate Traction networks by measure with transformer type electric substation.It is mainly used for electric railway perforation electric power system.
Description
Technical field
Become the present invention relates to attached wires of AC electrified railway for inverter type traction in electrical domain more particularly to perforation electric power system
Electric institute's load flow regulation technology.
Background technology
Electric railway is generally using the single phase industrial frequency AC system powered by municipal power supply system, to bear single-phase traction
Equilibrium assignmen, electric railway often use rotation phase sequence, the side of split-phase switched-mode power supply to lotus as far as possible in three-phase electrical power system
Case.Isolated between adjacent service area at split-phase subregion with neutral section insulator, form electric split-phase, abbreviation split-phase.Electric locomotive leads to
The traditional approach of phase splitting is to cross split-phase manually, relies primarily on driver and carries out moving back grade manually, closes auxiliary unit, main open circuit of breaking
Device crosses neutral section, again co-host break road device, conjunction auxiliary unit by train inertia and then recovers traction power to complete split-phase.
This artificial commutation mode be easy to cause the charged logical phase splitting (crossing split-phase) of electric locomotive and arcing occurs and burns out contact net and hangs
Component is hung, even results in the accidents such as phase fault.With the continuous rise of train speed, automatic passing over of neutral section technology is employed, it is main
There are floor switches to automatically switch split-phase, automatic passing over of neutral section etc. is several on vehicle-mounted automatic passing over of neutral section and column, but there are still open
Concern changes the electrical process of transient state that middle train leads to phase splitting, is also easy to produce larger switching overvoltage or overcurrent, causes to draw
The accidents such as net and mobile unit scaling loss, even result in automatic passing over of neutral section operation failure, influence power supply reliability and train is transported safely
Row.Therefore, electric split-phase link is link most weak in entire tractive power supply system, and train too mutually becomes high-speed railway and is
The bottleneck powered to entire electric railway traction.
Theory and practice shows to use single-phase traction transformer or combined type cophase supply technology can be in traction substation
Cancel the electric split-phase in its exit, use two-side feeding technology that can cancel the electric split-phase at this in subregion, so as to eliminate confession
Storage battery neck improves railway power supply ability and transport capacity.It will be appreciated, however, that electric railway subregion two-side feeding class
The cyclization of power grid is similar to, application is restricted be subject to grid conditions, for example the voltage class of power grid and Traction networks is closer to,
The electric current that weighs is larger, should not implement two-side feeding (cyclization) etc., in addition, when the traction power transformation for taking the electric power grid not being connected in two
It is required when cancelling electric split-phase and implementing perforation power supply, it is clear that two-side feeding (cyclization) technology, therefore, purport of the present invention cannot be used
A kind of the load flow regulation system and its load flow regulation of the inverter type traction substation on such perforation electric power system are being provided
Method.
The content of the invention
The object of the present invention is to provide it is a kind of perforation electric power system inverter type traction substation load flow regulation device and its
Regulation and control method, it can efficiently solve in the perforation electric power system plant issue of inverter type traction substation load flow regulation and
The technical issues of load flow regulation.
The present invention solves its technical problem, and used technical solution is：A kind of perforation electric power system inverter type traction
Electric substation's load flow regulation device and its regulation and control method, including traction substation and Traction networks OCS, traction substation primary side connection three
Phase power grid ABC, secondary side are connected to Traction networks OCS through drawing busbar TB and tractive feeder F, the Traction networks between each traction substation
OCS is connected to implement with the power supply that connects electric railway；The perforation electric power system sets one using tractive transformer TT
Transformer type traction substation, be denoted as electric substation TS, if its capacity be S0；N are set to be handed over directly using transformer T series connection
I-th inverter type traction substation is denoted as electric substation CS by the inverter type traction substation of alternating flow device ADAiIf it holds
It measures as Si, i=1,2 ..., n, n >=1；The feeder breaker K and Current Transmit of electric substation TS0Series connection access electric substation TS's
Tractive feeder F, voltage transformer pt0It is connected to draw on busbar TB；Electric substation CSiFeeder breaker K and current transformer
CTiSeries connection access electric substation CSiTractive feeder F, voltage transformer ptiIt is connected to draw on busbar TB；Electric substation CSi's
Load flow regulation device is by electric substation CSiLoad flow regulation device PSi, electric substation CSiCurrent Transmiti, voltage transformer pti
And the Current Transmit of fiber optic network FO and electric substation TS0And voltage transformer pt0It collectively forms；Electric substation CSiTrend
Modulator PSiInput terminal connects electric substation CSiCurrent TransmitiAnd voltage transformer pti, connected by fiber optic network FO
Connect the Current Transmit of electric substation TS0And voltage transformer pt0, load flow regulation device PSiOutput terminal connects electric substation CSiIt hands over
Orthogonal current transformer ADAiControl terminal.
The present invention is to the method for traction substation load flow regulation：Load flow regulation device PSiIt is transmitted according to fiber optic network FO
Electric substation's TS Current Transmits0And voltage transformer pt0The apparent energy s measured0With electric substation's CSi Current TransmitsiWith
Voltage transformer ptiThe apparent energy s measurediCompare, then pass through electric substation CSiAC-DC-AC converter ADAiControl terminal adjustment
Its apparent energy siObject function is approached in traction busbar voltage allowed band：
si:s0=Si:S0, i=1,2 ..., n, n >=1
Regulate and control electric substation CSiThe apparent energy s that AC-DC-AC converter generatesiWith the apparent energy s of electric substation TS0The ratio between
Approach electric substation CSiCapacity SiWith electric substation TS capacity S0The ratio between.
Load flow regulation method, a kind of perforation electric power system inverter type traction substation trend tune can also be further simplified
Prosecutor method, load flow regulation device PSiThe electric substation's TS Current Transmits transmitted according to fiber optic network FO0The feeder current I measured0
With electric substation CSiCurrent TransmitiThe feeder current I measurediCompare, then pass through electric substation CSiAC-DC-AC converter ADAi's
Control terminal adjusts its feeder current IiObject function is approached in traction busbar voltage allowed band：
Ii:I0=Si:S0, i=1,2 ..., n, n >=1
Regulate and control electric substation CSiThe feeder current I that AC-DC-AC converter generatesiWith the feeder current I of electric substation TS0The ratio between
Approach electric substation CSiCapacity SiWith electric substation TS capacity S0The ratio between.
The present invention operation principle be：Using fiber optic network transmission capacity is big, fireballing advantage and data synchronization technology
Obtain strange land traction substation synchrodata, with the electric current of a transformer type traction substation (electric substation TS), voltage and
Power data is reference, considers transformer type traction substation (electric substation TS) and inverter type traction substation (electric substation
CS1) the economic power supply factor that determines of capacity, and it is fast far above train load variation to be regulated the speed based on AC-DC-AC converter
The strong technical factor of degree, following feature in traction busbar voltage allowed band, makes electric substation TS and electric substation CS1Approach by
The target of train load on its capacity ratio distribution Traction networks, similarly, the 3rd inverter type traction substation (electric substation CS2)
With reference also to electric substation TS and make electric substation CS2The target that the two share is distributed by its capacity ratio is approached with electric substation TS, together
When electric substation CS1By electric substation CS1Its share is redistributed with electric substation TS capacity ratio targets, so as to approach electric substation CS1、
Electric substation CS2Such a new target is distributed by its capacity ratio with electric substation TS three, the rest may be inferred by analogy.
Compared with prior art, the beneficial effects of the invention are as follows：
First, load flow regulation system of the invention can be drawn with an inverter type traction substation and a transformer type
The data of electric substation are accurate, reasonably complete this inverter type traction substation is penetrating through the load flow regulation of electric power system with dividing
Match somebody with somebody, it is mutual indepedent in the load flow regulation of the perforation electric power system with other (if any) inverter type traction substations, mutually
It does not associate.
2nd, the regulation and control method of power (electric current) ratio of the invention is adopted (if any) from other in perforation electric power system
Regulate and control the influence of method with the electric substation of AC-DC-AC converter, also from train position in system and quantity and its operating condition
The influence of (traction or braking).
3rd, compared with traditional current transformer sagging curve control method, power of the invention (electric current) is than regulation and control method more
Sensitive, more accurate, use scope is wider；The flow control method phase used with existing traction substation combined type cophase supply
Than, power of the invention (electric current) than regulation and control method can in not obtaining and (can not also obtain) the perforation electric power system train it is total
The load flow regulation of inverter type traction substation is completed in the case of load, and from train position and quantity and its operation work
The influence of condition (traction or braking), also from (if any) inverter type of other in system traction substation regulation and control method
It influences.
4th, the configuration of the present invention is simple, superior performance, technologically advanced, method is reliable, easy to implement.
Description of the drawings
Fig. 1 is the perforation electric power system of the embodiment of the present invention and inverter type traction substation load flow regulation device configuration knot
Structure schematic diagram.
Fig. 2 is the inverter type traction substation load flow regulation apparatus structure schematic diagram of the embodiment of the present invention.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and detailed description.
Embodiment
Fig. 1 shows that the perforation electric power system and inverter type traction substation load flow regulation device of the embodiment of the present invention are matched somebody with somebody
Put structure diagram：The perforation electric power system is made of traction substation and Traction networks OCS etc., traction substation primary side connection three
Phase power grid ABC, secondary side are connected to Traction networks OCS through drawing busbar TB and tractive feeder F, the Traction networks between each traction substation
OCS is connected to implement with the power supply that connects electric railway；The perforation electric power system includes a transformer type and draws power transformation
Institute, is powered or combined type cophase supply using tractive transformer TT, is denoted as electric substation TS, if its capacity is S0, also have n
Inverter type traction substation, it is in series by transformer T and AC-DC-AC converter ADA, i-th inverter type is drawn into power transformation
Be denoted as electric substation CSiIf its capacity is Si, i=1,2 ..., n, n >=1, electric substation CSiLoad flow regulation device be denoted as PSi；Become
The tractive feeder F of electric institute TS seals in feeder breaker K and Current Transmit0, traction busbar TB setting voltage transformer pts0；
Electric substation CSiTractive feeder F seal in feeder breaker K and Current Transmiti, traction busbar TB setting voltage transformers
PTi；In figure, L1, L2, L3 are train；Electric substation CSiLoad flow regulation device by electric substation CSiLoad flow regulation device PSi、
Current Transmiti, voltage transformer ptiAnd the Current Transmit of fiber optic network FO and electric substation TS0And voltage transformer
PT0It collectively constitutes；Electric substation CSiLoad flow regulation device PSiInput terminal connects electric substation CSiCurrent TransmitiAnd voltage
Mutual inductor PTi, pass through the Current Transmit of fiber optic network FO connections electric substation TS0And voltage transformer pt0, the load flow regulation
Device PSiOutput terminal connects electric substation CSiAC-DC-AC converter ADAiControl terminal, as shown in phantom in FIG., arrow represent information flow
Dynamic direction.
As electric substation CSiDuring more than 2, the position that should as far as possible be positioned close to electric substation TS among system.
Fig. 2 is the inverter type traction substation load flow regulation apparatus structure schematic diagram of the embodiment of the present invention.Also such as Fig. 1 institutes
Show, electric substation CSiLoad flow regulation device by electric substation CSiLoad flow regulation device PSi, Current Transmiti, mutual induction of voltage
Device PTiAnd the Current Transmit of fiber optic network FO and electric substation TS0And voltage transformer pt0It collectively constitutes；Electric substation CSi
Load flow regulation device PSiInput terminal connects electric substation CSiCurrent TransmitiAnd voltage transformer pti, pass through optical network
The Current Transmit of network FO connections electric substation TS0And voltage transformer pt0, load flow regulation device PSiOutput terminal connects electric substation
CSiAC-DC-AC converter ADAiControl terminal.
Penetrating through the load flow regulation method of the inverter type traction substation of electric power system is:Load flow regulation device PSiAccording to light
Electric substation's TS Current Transmits that fibre web network FO is transmitted0And voltage transformer pt0The apparent energy s measured0With electric substation CSi
Current TransmitiAnd voltage transformer ptiThe apparent energy s measurediCompare, then pass through electric substation CSiAC-DC-AC converter
ADAiControl terminal adjust its apparent energy siObject function is approached in traction busbar voltage allowed band：
si:s0=Si:S0, i=1,2 ..., n, n >=1
Regulate and control electric substation CSiThe apparent energy s that AC-DC-AC converter generatesiWith the apparent energy s of electric substation TS0The ratio between
Approach electric substation CSiCapacity SiWith electric substation TS capacity S0The ratio between.
Load flow regulation method can also be further simplified, i.e.,:Load flow regulation device PSiThe electric substation TS transmitted according to optical fiber FO
Current Transmit0The feeder current I measured0With electric substation CSiCurrent TransmitiThe feeder current I measurediCompare, then lead to
Cross electric substation CSiAC-DC-AC converter ADAiControl terminal adjust its feeder current IiIt is forced in traction busbar voltage allowed band
Close-target function：
Ii:I0=Si:S0, i=1,2 ..., n, n >=1
Regulate and control electric substation CSiThe feeder current I that AC-DC-AC converter generatesiWith the feeder current I of electric substation TS0The ratio between
Approach electric substation CSiCapacity SiWith electric substation TS capacity S0The ratio between.
The present invention operation principle be：Using fiber optic network transmission capacity is big, fireballing advantage and data synchronization technology
Obtain strange land traction substation synchrodata, with the electric current of a transformer type traction substation (electric substation TS), voltage and
Power data is reference, is considered as transformer type traction substation (electric substation TS) and inverter type traction substation (power transformation
Institute CS1) the economic power supply factor that determines of capacity, and it is fast far above train load variation to be regulated the speed based on AC-DC-AC converter
The strong technical factor of degree, following feature in traction busbar voltage allowed band, makes electric substation TS and electric substation CS1Approach by
The target of train load on its capacity ratio distribution Traction networks, similarly, the 3rd use (transformer adds) AC-DC-AC converter
Traction substation (electric substation CS2) with reference also to electric substation TS and make electric substation CS2It is approached with electric substation TS by its capacity ratio point
Target with the two share, while electric substation CS1By electric substation CS1Its share is redistributed with electric substation TS capacity ratio targets,
So as to approach electric substation CS1, electric substation CS2Distribute such a new target by its capacity ratio with electric substation TS three, it is remaining this
Analogize.
Claims (3)
1. a kind of perforation electric power system inverter type traction substation load flow regulation device, including traction substation and Traction networks
OCS, traction substation primary side connection three phase network ABC, secondary side are connected to Traction networks OCS through drawing busbar TB and tractive feeder F,
Traction networks OCS between each traction substation is connected to implement with the power supply that connects electric railway；It is characterized in that：This is passed through
Logical electric power system sets a transformer type traction substation using tractive transformer TT, is denoted as electric substation TS, if its
Capacity is S0；The n inverter type traction substations using transformer T series connection AC-DC-AC converters ADA are set, by i-th change
Stream type traction substation is denoted as electric substation CSiIf its capacity is Si, i=1,2 ..., n, n >=1；The feeder line open circuit of electric substation TS
Device K and Current Transmit0The tractive feeder F of series connection access electric substation TS, voltage transformer pt0It is connected to it and draws busbar TB
On；Electric substation CSiFeeder breaker K and Current TransmitiSeries connection access electric substation CSiTractive feeder F, mutual induction of voltage
Device PTiIt is connected to draw on busbar TB；Electric substation CSiLoad flow regulation device by electric substation CSiLoad flow regulation device PSi, should
Electric substation CSiCurrent Transmiti, voltage transformer ptiAnd the Current Transmit of fiber optic network FO and electric substation TS0
And voltage transformer pt0It collectively forms；Electric substation CSiLoad flow regulation device PSiInput terminal connects electric substation CSiElectric current it is mutual
Sensor CTiAnd voltage transformer pti, pass through the Current Transmit of fiber optic network FO connections electric substation TS0And voltage transformer
PT0, load flow regulation device PSiOutput terminal connects electric substation CSiAC-DC-AC converter ADAiControl terminal.
2. for a kind of perforation electric power system inverter type traction substation load flow regulation device according to claim 1
Regulation and control method, it is characterised in that:Load flow regulation device PSiThe electric substation's TS Current Transmits transmitted according to fiber optic network FO0And electricity
Press mutual inductor PT0The apparent energy s measured0With electric substation's CSi Current TransmitsiAnd voltage transformer ptiThe apparent work(measured
Rate siCompare, then pass through electric substation CSiAC-DC-AC converter ADAiControl terminal adjust its apparent energy siIn traction busbar voltage
Object function is approached in allowed band：
si:s0=Si:S0, i=1,2 ..., n, n >=1
Regulate and control electric substation CSiThe apparent energy s that AC-DC-AC converter generatesiWith the apparent energy s of electric substation TS0The ratio between approach
Electric substation CSiCapacity SiWith electric substation TS capacity S0The ratio between.
3. regulation and control method according to claim 2, it is characterised in that:Load flow regulation device PSiIt is transmitted according to fiber optic network FO
Electric substation's TS Current Transmits0The feeder current I measured0With electric substation CSiCurrent TransmitiThe feeder current I measurediThan
Compared with, then pass through electric substation CSiAC-DC-AC converter ADAiControl terminal adjust its feeder current IiAllow model in traction busbar voltage
Object function is approached in enclosing：
Ii:I0=Si:S0, i=1,2 ..., n, n >=1
Regulate and control electric substation CSiThe feeder current I that AC-DC-AC converter generatesiWith the feeder current I of electric substation TS0The ratio between approach
Electric substation CSiCapacity SiWith electric substation TS capacity S0The ratio between.
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| CN113076660B (en) * | 2021-04-28 | 2023-01-31 | 中铁二院工程集团有限责任公司 | Electrified railway circulation calculation method adopting hybrid power supply system bilateral power supply mode |
| CN113270868B (en) * | 2021-05-24 | 2022-06-24 | 西南交通大学 | Dynamic load flow calculation method for power supply system of alternating current electrified railway train |
| CN114336639B (en) * | 2022-03-17 | 2022-05-24 | 西南交通大学 | Intelligent traction substation and power flow control method thereof |
| CN114336640B (en) * | 2022-03-17 | 2022-05-24 | 西南交通大学 | Intelligent three-phase traction power supply system and power flow control method thereof |
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