CN105207495A - Single-phase four-quadrant power unit for cascade connection with in-phase power supply system - Google Patents
Single-phase four-quadrant power unit for cascade connection with in-phase power supply system Download PDFInfo
- Publication number
- CN105207495A CN105207495A CN201510704387.3A CN201510704387A CN105207495A CN 105207495 A CN105207495 A CN 105207495A CN 201510704387 A CN201510704387 A CN 201510704387A CN 105207495 A CN105207495 A CN 105207495A
- Authority
- CN
- China
- Prior art keywords
- phase
- inverter circuit
- side inverter
- power cell
- supply system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Inverter Devices (AREA)
Abstract
The invention relates to a single-phase four-quadrant power unit for cascade connection with an in-phase power supply system. The power unit comprises an input series side inverter circuit, an output parallel side inverter circuit and a DC bus capacitor, wherein the DC bus capacitor is arranged between the input series side inverter circuit and the output parallel side inverter circuit; both the series side inverter circuit and the parallel side inverter circuit adopt single-phase full-bridge inverter circuit structures. The major loop of the power unit adopts a topological structure of a single-phase serial rectification, a DC bus filtering energy storing and single-phase parallel inverting, so as to eliminate a series side booster transformer (an isolation transformer is equipped by a user); moreover, bidirectional flow of energy is realized due to the topological structure, so as to reach the four-quadrant running standard.
Description
Technical field
The invention belongs to track traffic electric power electronic technology field, particularly for a kind of single-phase four-quadrant power cell that can supply cascade for cophase supply system.
Background technology
Current China Traction Substation of Electric Railway is all power taking from public electric wire net, generally adopts single phase industrial frequence alternating current to be locomotive power supply.Electric power system wishes that all loads are all the fundamental currents of taking three-phase symmetrical from electrical network, and to make full use of the capacity of circuit, equipment, minimizing reactive current and harmonic current are to the harm of system.For meeting this requirement, electric railway adopts phase sequence rotation, the scheme that segmentation phase-splitting is powered.Can not be identical at any time but the traction due to each section meets size, phase-splitting segmentation scheme just alleviates the impact of three-phase imbalance to a certain extent, and fundamentally can not solve the impact of the single-phase electricity consumption of railway load on whole shared electrical network.For the problem of above rail traction substation, major part adopts reactive power compensator or shunt capacitor fixed compensation pattern at present.Because traction meets the acute variation of operation, the overcompensation just causing underloading idle and the idle undercompensation of heavy duty, its result all causes traction power supply constant power factor on the low side.
In order to solve the problem, Chinese patent CN101856979B proposes a kind of compensated current transformer device based on cophase supply technology, this device is in parallel by multiple AC-DC-AC power unit, and each power cell two side joint step-up transformer secondary, two transformer primary sides connect Traction networks respectively.
But there is following problem in this cophase supply converter device:
1, many transformers additionally, cost is higher.
2, because this device and traction transformer mutually bundle on capacity, normal power supply and driving is affected when this device exits.
3, installed capacity is large, and cost is high.
Summary of the invention
Based on the technological deficiency that above-mentioned background technology exists, we propose a kind of based under single phase system for the single-phase four-quadrant power cell of the tandem type of cophase supply system, major loop have employed the topological structure of single-phase series rectification+DC bus filtering energy storage+parallel single-phase inversion, decrease the step-up transformer (isolating transformer is user's configuration) of series side, this topological structure achieves the two-way flow of energy simultaneously, reaches four quadrant running standard.
For solving the problems of the technologies described above, technical solution of the present invention is as follows:
Can for a single-phase four-quadrant power cell for cascade for cophase supply system, described power cell comprises input series side inverter circuit, output-parallel side inverter circuit and dc-link capacitance; Described dc-link capacitance is between input series side inverter circuit, output-parallel side inverter circuit, described series side inverter circuit all adopts single-phase full bridge inverter circuit structure with side in parallel inverter circuit, described output-parallel side inverter circuit is connected to a unit controls plate, and described input series side inverter circuit is connected to another unit controls plate.
Further, described output-parallel side inverter circuit is connected to a unit controls plate, and described input series side inverter circuit is connected to another unit controls plate.
Further, also comprise a voltage acquisition plate and a current sensor, described current sensor is between output-parallel side inverter circuit and a unit controls plate, and described voltage acquisition plate is between input series side inverter circuit and another unit controls plate.
Further, described single-phase full bridge inverter circuit comprises two inversion half-bridges, and each inversion half-bridge comprises two inversion devices.
Further, described inversion device be IGBT, IGCT, GTO, controllable silicon or intelligent power integration module any.
Further, an each inversion half-bridge peak restrained circuit in parallel, circuit form is any of C capacitive absorption circuit, RC resistance capaciting absorpting circuit and RCD absorbing circuit.
Further, a three-phase-single-phase isolating transformer and two reactors are also comprised; Described power cell has N number of, N number of input series side inverter circuit is connected in series successively, the former limit of described three-phase-single-phase isolating transformer adopts wye connection to connect 220KV electrical network, described three-phase-single-phase isolating transformer secondary adopts Δ connection, connect the head and the tail after N number of input series side inverter circuit serial connection by two reactors, N is natural number.
Further, also comprise a single-phase traction transformer and N number of single-phase filter circuit, single-phase traction transformer is made up of N number of vice-side winding; Described power cell has N number of, and each output-parallel side inverter circuit connects a single-phase filter circuit, then connects with corresponding single-phase traction transformer vice-side winding, and N is natural number.
Further, described single-phase filter circuit is any of inductance L filter circuit, inductance capacitance LC filter circuit and inductance capacitance π type LCL filter circuit.
Further, when adopting inductance L filter circuit, single-phase traction transformer vice-side winding adopts to open and Lou designs.
Further, described dc-link capacitance is thin-film capacitor.Described dc-link capacitance can be the thin-film capacitor being suitable for high frequency, high-power energy conversion.
The present invention's beneficial effect is compared with prior art:
1) major loop of the present invention have employed the topological structure of single-phase series rectification+DC bus filtering energy storage+parallel single-phase inversion, decrease the step-up transformer (isolating transformer is user's configuration) of series side, this topological structure achieves the two-way flow of energy simultaneously, reaches the standard of four quadrant running.
2) have employed voltage acquisition plate to gather DC bus-bar voltage, current sensor and gather side in parallel output current and control for participating in, the peak voltage that when adopting C capacitive absorption circuit effectively can absorb IGBT switch, curent change is formed in bus stray inductance simultaneously.
3) dc-link capacitance circuit is adopted, for DC bus energy storage and filtering, for output-parallel side provides larger ripple current, present invention employs the thin-film capacitor with multiple advantage such as better high frequency characteristics, more large ripple current, longer useful life, higher use voltage, lower equivalent internal resistance ESR.
4) the present invention adopts serial communication, compares point-to-point communication, and number of fibers reduces 2/3, avoids adopting board inserting mode, greatly improves reliability.
5) the present invention adopts single-phase filter capacitor to be inductance L filtering, can further conserve space, Cost optimization, minimizing number of devices, improve device reliability, adopt traction transformer 660V lateral coil to open Lou to reach the object obtaining inductance value, wherein inductance value is 300uH.
Accompanying drawing explanation
Fig. 1 is cophase supply compensated current transformer systematic schematic diagram involved in the present invention.
The power cell topological diagram that Fig. 2 is involved in the present invention.
Fig. 3 is unit controls plate functional block diagram involved in the present invention.
Embodiment
A kind ofly can to further describe for the single-phase four-quadrant power cell of cascade for cophase supply system of the present invention below in conjunction with accompanying drawing.
Fig. 1 is cophase supply compensated current transformer systematic schematic diagram, indicate multiple power cell annexation in systems in which, wherein cophase supply compensated current transformer is made up of 15 identical power cells, multiple output-parallel sides inverter circuit is connected with traction matching transformer secondary, forming the cophase supply compensated current transformer side in parallel of multiple parallel, is that the single-phase 27.5KV single-phase traction transformer of 660V-is connected to direct current network 27.5KV by parameter; The input series side inverter circuit of multiple power cell is connected in series the cophase supply compensated current transformer series side of the multiple cascade of rear formation successively, and after being connected to inductance L 1 and L2, be connected to three-phase-single-phase isolating transformer that former limit adopts wye connection, and then connect 220KV electrical network; In Fig. 1, power cell side in parallel single-phase filter circuit have employed inductance L filtering, in order to save volume and cost, the design of L inductance value is at traction matching transformer secondary, historical facts or anecdotes eliminates inductance in border, adopt the coiling of single-phase traction transformer 660V test coil to adopt and open Lou design, form single-phase L filter circuit with side in parallel inverter circuit, it is 300uH that traction transformer 660V lateral coil leaves electric leakage sensibility reciprocal.
Fig. 2 is power cell internal topological diagram, power cell comprises input series side inverter circuit, DC bus filter capacitor, output-parallel side inverter circuit, wherein input series side inverter circuit and input series side inverter circuit and form single-phase full bridge H circuit by the Intelligent Power Module IGBT that two half-bridges encapsulate, control the conversion of electric current by master control.H-bridge inverter circuit all comprises peak restrained circuit, the peak voltage that when adopting C capacitive absorption circuit for absorbing IGBT switch, curent change is formed in bus stray inductance; DC bus filter capacitor is intermediate energy storage and filtering link, completes the object of busbar voltage filtering and energy storage; Unit controls plate realizes with the communication of master control, controls the co-ordination of power cell each several part, monitors detection power cell operation state and troubleshooting; Voltage acquisition plate, current sensor are for gathering key signal amount (DC bus-bar voltage and side in parallel electric current).
Fig. 3 is the functional block diagram of power cell unit controls plate, and the function of unit controls plate, for ensureing reliable diffusion single-phase full bridge drive singal, possesses detection and the defencive function of all kinds of fault, the DC bus-bar voltage of process sampling module transmission or output current; The function of power module is ensure the reliable power supply producing needs, and possess electric voltage exception and detect and short-circuit protection function, wherein power supply comprises 24V ,+15V ,-15V, 5V, 3.3V.
Description for the understanding of embodiment be only for help understand the present invention, instead of be used for restriction of the present invention.Those skilled in the art all can utilize thought of the present invention to carry out some and change and change, as long as its technological means does not depart from thought of the present invention and main points, still within protection scope of the present invention.
Claims (11)
1. for a single-phase four-quadrant power cell for cascade, can it is characterized in that for cophase supply system: described power cell comprises input series side inverter circuit, output-parallel side inverter circuit and dc-link capacitance; Described dc-link capacitance is between input series side inverter circuit, output-parallel side inverter circuit, and described series side inverter circuit all adopts single-phase full bridge inverter circuit structure with side in parallel inverter circuit.
2. a kind of single-phase four-quadrant power cell that can supply cascade for cophase supply system according to claim 1, it is characterized in that: described output-parallel side inverter circuit is connected to a unit controls plate, described input series side inverter circuit is connected to another unit controls plate.
3. a kind of single-phase four-quadrant power cell that can supply cascade for cophase supply system according to claim 2, it is characterized in that: also comprise a voltage acquisition plate and a current sensor, described current sensor is between output-parallel side inverter circuit and a unit controls plate, and described voltage acquisition plate is between input series side inverter circuit and another unit controls plate.
4. a kind of single-phase four-quadrant power cell that can supply cascade for cophase supply system according to claim 1, it is characterized in that: described single-phase full bridge inverter circuit comprises two inversion half-bridges, each inversion half-bridge comprises two inversion devices.
5. according to claim 4ly a kind ofly for the single-phase four-quadrant power cell of cascade, can to it is characterized in that for cophase supply system: described inversion device be IGBT, IGCT, GTO, controllable silicon or intelligent power integration module any.
6. a kind of single-phase four-quadrant power cell that can supply cascade for cophase supply system according to claim 4, it is characterized in that: an each inversion half-bridge peak restrained circuit in parallel, circuit form is any of C capacitive absorption circuit, RC resistance capaciting absorpting circuit and RCD absorbing circuit.
7. a kind of single-phase four-quadrant power cell that can supply cascade for cophase supply system according to claim 1, is characterized in that: also comprise a three-phase-single-phase isolating transformer and two reactors; Described power cell has N number of, N number of input series side inverter circuit is connected in series successively, the former limit of described three-phase-single-phase isolating transformer adopts wye connection to connect 220KV electrical network, described three-phase-single-phase isolating transformer secondary adopts Δ connection, connect the head and the tail after N number of input series side inverter circuit serial connection by two reactors, N is natural number.
8. a kind of single-phase four-quadrant power cell that can supply cascade for cophase supply system according to claim 1, is characterized in that: also comprise a single-phase traction transformer and N number of single-phase filter circuit, single-phase traction transformer is made up of N number of vice-side winding; Described power cell has N number of, and each output-parallel side inverter circuit connects a single-phase filter circuit, then connects with corresponding single-phase traction transformer vice-side winding, and N is natural number.
9. according to claim 8ly a kind ofly for the single-phase four-quadrant power cell of cascade, can to it is characterized in that for cophase supply system: described single-phase filter circuit is any of inductance L filter circuit, inductance capacitance LC filter circuit and inductance capacitance π type LCL filter circuit.
10. the single-phase four-quadrant power cell of a kind of tandem type for cophase supply system according to claim 9, is characterized in that: when adopting inductance L filter circuit, and single-phase traction transformer vice-side winding adopts to open and Lou designs.
11. a kind of single-phase four-quadrant power cells that can supply cascade for cophase supply system according to claim 1, is characterized in that: described dc-link capacitance is thin-film capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510704387.3A CN105207495A (en) | 2015-10-27 | 2015-10-27 | Single-phase four-quadrant power unit for cascade connection with in-phase power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510704387.3A CN105207495A (en) | 2015-10-27 | 2015-10-27 | Single-phase four-quadrant power unit for cascade connection with in-phase power supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105207495A true CN105207495A (en) | 2015-12-30 |
Family
ID=54954991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510704387.3A Pending CN105207495A (en) | 2015-10-27 | 2015-10-27 | Single-phase four-quadrant power unit for cascade connection with in-phase power supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105207495A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106953332A (en) * | 2017-05-02 | 2017-07-14 | 中国矿业大学 | Electrified railway in-phase power supply scheme based on uncontrollable rectifier and step doping inversion |
| CN110855158A (en) * | 2018-08-20 | 2020-02-28 | 中车株洲电力机车研究所有限公司 | Converter module and converter |
| CN113726191A (en) * | 2021-08-13 | 2021-11-30 | 许继集团有限公司 | Fundamental wave control and harmonic compensation method and device of in-phase power supply device |
| CN114062819A (en) * | 2021-11-16 | 2022-02-18 | 许继集团有限公司 | Test system suitable for power module of in-phase power supply device and control method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101795081A (en) * | 2010-03-03 | 2010-08-04 | 中国科学院电工研究所 | Power electronic transformer having multi-winding isolation transformer |
| CN102201744A (en) * | 2011-06-03 | 2011-09-28 | 珠海万力达电气股份有限公司 | Double-chain type high-voltage frequency converter |
| CN103683960A (en) * | 2012-09-21 | 2014-03-26 | 成都市思博睿科技有限公司 | Series connection type high-power combined frequency converter |
| CN205092780U (en) * | 2015-10-27 | 2016-03-16 | 东方日立(成都)电控设备有限公司 | Be used for cophase power supply system can supply cascaded single -phase four -quadrant power unit |
-
2015
- 2015-10-27 CN CN201510704387.3A patent/CN105207495A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101795081A (en) * | 2010-03-03 | 2010-08-04 | 中国科学院电工研究所 | Power electronic transformer having multi-winding isolation transformer |
| CN102201744A (en) * | 2011-06-03 | 2011-09-28 | 珠海万力达电气股份有限公司 | Double-chain type high-voltage frequency converter |
| CN103683960A (en) * | 2012-09-21 | 2014-03-26 | 成都市思博睿科技有限公司 | Series connection type high-power combined frequency converter |
| CN205092780U (en) * | 2015-10-27 | 2016-03-16 | 东方日立(成都)电控设备有限公司 | Be used for cophase power supply system can supply cascaded single -phase four -quadrant power unit |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106953332A (en) * | 2017-05-02 | 2017-07-14 | 中国矿业大学 | Electrified railway in-phase power supply scheme based on uncontrollable rectifier and step doping inversion |
| CN106953332B (en) * | 2017-05-02 | 2019-07-16 | 中国矿业大学 | Electrified railway in-phase power supply scheme based on uncontrollable rectifier and step doping inversion |
| CN110855158A (en) * | 2018-08-20 | 2020-02-28 | 中车株洲电力机车研究所有限公司 | Converter module and converter |
| CN113726191A (en) * | 2021-08-13 | 2021-11-30 | 许继集团有限公司 | Fundamental wave control and harmonic compensation method and device of in-phase power supply device |
| CN114062819A (en) * | 2021-11-16 | 2022-02-18 | 许继集团有限公司 | Test system suitable for power module of in-phase power supply device and control method thereof |
| CN114062819B (en) * | 2021-11-16 | 2024-05-10 | 许继集团有限公司 | Test system suitable for power module of in-phase power supply device and control method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103441691B (en) | A kind of mode of resonance electronic power convertor and converter device | |
| CN103280829B (en) | A kind of isolation double-stage chain type current transformer being applied to high capacity cell energy storage | |
| CN204967652U (en) | Subway energy feedback device | |
| CN104485821A (en) | Direct current transformer device used for power distribution | |
| CN102195289A (en) | Cascade-structure-based hybrid active power filter | |
| CN106329572A (en) | Hybrid energy storage converter device and control method | |
| CN105790598A (en) | Highly-reliable main circuit topological structure of railway ground deflector | |
| CN102299646A (en) | Alternating-current inductance-free and energy-saving high-voltage direct-current traction power supply current transformation device and control method thereof | |
| CN102013685A (en) | Transformerless STATCOM (Static Compensator) topological structure based on MMC (Modular Multilevel Converter) | |
| CN102983765A (en) | Efficient no-transformer single phase photovoltaic grid-connected inverter | |
| CN203859583U (en) | Multipath parallel redundant substation DC power supply system | |
| CN105207495A (en) | Single-phase four-quadrant power unit for cascade connection with in-phase power supply system | |
| CN102983584A (en) | Unified power flow controller used for unbalanced system | |
| CN210881738U (en) | High-power bidirectional charger | |
| CN109687721B (en) | Locomotive power supply device for three-phase 10kV to single-phase 27.5kV overhauling | |
| CN101499660A (en) | DC voltage balance control system for diode clamping cascade multi-level STATCOM | |
| CN102611116A (en) | Single-phase electric energy quality controller for electrified railway power supply system | |
| CN205092780U (en) | Be used for cophase power supply system can supply cascaded single -phase four -quadrant power unit | |
| CN104935205A (en) | Transformer used for traction transmission system | |
| CN205123595U (en) | Novel electrified railway link up line power supply | |
| CN103515970B (en) | A kind of three brachium pontis compensation arrangements with asymmetry compensation idle for electric railway | |
| CN104393591A (en) | Power supply system | |
| CN202930956U (en) | Unified power flow controller used in unbalanced system | |
| CN105162351A (en) | Current limiting bidirectional deflector of DC power distribution network | |
| CN102983586B (en) | A kind of HVDC based on three-level voltage source converter holds concurrently UPFC system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151230 |