CN204597496U - Subway inversion feedback type regenerating braking energy absorption plant - Google Patents
Subway inversion feedback type regenerating braking energy absorption plant Download PDFInfo
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- CN204597496U CN204597496U CN201520191144.XU CN201520191144U CN204597496U CN 204597496 U CN204597496 U CN 204597496U CN 201520191144 U CN201520191144 U CN 201520191144U CN 204597496 U CN204597496 U CN 204597496U
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/72—Electric energy management in electromobility
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Abstract
The utility model discloses a kind of subway inversion feedback type regenerating braking energy absorption plant, it relates to metro braking technical field.It comprises PWM type inverter, Active Power Filter-APF, isolating transformer, rectifier transformer and voltage regulator controllers, PWM type inverter access train braking energy, PWM type inverter, Active Power Filter-APF, isolating transformer, rectifier transformer connect successively, rectifier transformer feedback link is to electrical network, PWM type inverter is also connected with voltage regulator controllers by signal processing unit, voltage regulator controllers is connected with drive circuit by SPWM, and drive circuit connects PWM type inverter.The utility model provides better protection to electrical network, realizes train lightweight, improves power utilization rate, reduces operation cost, good energy-conserving effect, meets the policy of national energy-saving reduction of discharging, low-carbon environment-friendly.
Description
Technical field
The utility model relates to metro braking technical field, be specifically related to subway inversion feedback type regenerating braking energy absorption plant.
Background technology
Along with developing rapidly of urban rail transit in China construction, subway has become the Main Patterns of urban track traffic, but also bring many problems simultaneously, train can to electrical network feedback energy when braking, when this part energy can not be absorbed by other vehicles or power consumption equipment completely, line voltage can be caused to raise, and this is very unfavorable to the operation of power station equipment and vehicle, therefore need device dump energy is consumed, to maintain Network Voltage Stability.
Mostly adopted the method installing Large Copacity absorption resistance ON TRAINS to absorb this part energy in the past, its major defect fails braking energy to be used, cause certain energy dissipation, simultaneously in order to need to increase corresponding ventilation unit to absorption plant heat radiation, this just brings the problem of temperature rise in tunnel and station, cause car body weight to increase simultaneously, equipment general layout difficulty under car, run counter to the theme of energy-conserving and environment-protective like this, do not meet the light-weighted developing direction of train, cause a large amount of energy wastes yet and the construction cost of subway and operating cost are increased.
The capacitor energy storage type regenerating braking energy absorption plant that some trains use is for the large rail line of freight volume, and capacitance is not enough to complete absorption and regeneration electric energy; And product corresponding speed is slow at present, Capacitor banks is bulky, is arrange or safeguard all pretty troublesome; Capacitor is frequently in charging and discharging state, and the general life-span is shorter, cannot continuation use.
In order to make full use of regenerated energy, the energy-saving effect reached, from the more good utilisation energy, the energy absorbing device of a kind of novel, reliable, energy-conservation, sustainable use of angle of cost-saving grade is the inexorable trend of development.
Utility model content
For the deficiency that prior art exists; the utility model object is to provide a kind of subway inversion feedback type regenerating braking energy absorption plant; better protection is provided to electrical network; realize train lightweight; improve power utilization rate; reduce operation cost, good energy-conserving effect, meet the policy of national energy-saving reduction of discharging, low-carbon environment-friendly.
To achieve these goals, the utility model realizes by the following technical solutions: subway inversion feedback type regenerating braking energy absorption plant, comprise PWM type inverter, Active Power Filter-APF, isolating transformer, rectifier transformer and voltage regulator controllers, PWM type inverter access train braking energy, direct current is converted into alternating current by PWM type inverter, PWM type inverter, Active Power Filter-APF, isolating transformer, rectifier transformer connects successively, the effect of isolating transformer be in order to prevent a certain brachium pontis of inverter be short-circuited fault time, direct current directly enters AC system, rectifier transformer feedback link is to electrical network, and PWM type inverter is also connected with voltage regulator controllers by signal processing unit, and voltage regulator controllers is connected with drive circuit by SPWM, and drive circuit connects PWM type inverter.
As preferably, the inverter bridge that described PWM type inverter is made up of six insulated gate bipolar transistors forms, the gate pole of the first insulated gate bipolar transistor-six insulated gate bipolar transistor all connects drive circuit, first insulated gate bipolar transistor, 3rd insulated gate bipolar transistor, the collector electrode of the 5th insulated gate bipolar transistor all connects positive source, first insulated gate bipolar transistor, 3rd insulated gate bipolar transistor, the emitter of the 5th insulated gate bipolar transistor connects the 4th insulated gate bipolar transistor respectively, 6th insulated gate bipolar transistor, the collector electrode of the second insulated gate bipolar transistor, 4th insulated gate bipolar transistor, 6th insulated gate bipolar transistor, the emitter of the second insulated gate bipolar transistor all connects power cathode, the first diode-six diode is connected to respectively between the emitter of the first insulated gate bipolar transistor-six insulated gate bipolar transistor and collector electrode.
As preferably, described voltage regulator controllers adopts digital proportional integral PI controller, adopt SPWM control strategy, meet actual needs regulation output voltage magnitude in real time, three electronic feedback are returned by the current measurement device of the three-phase alternating current after inversion, compare with given reference current signal, the error signal obtained regulates through pi regulator, signal after adjustment sends into PWM type inverter, be used for the modulated sinusoid amplitude of control PWM type inverter, the conducting that the PWM ripple that PWM type inverter produces is used for controlling inverter circuit power device IGBT turns off, thus realize voltage regulation function.
As preferably, described subway inversion feedback type regenerating braking energy absorption plant also comprises phase-locked loop, and phase-locked loop is made up of phase comparator, low pass filter, voltage controlled oscillator, and phase comparator, low pass filter, voltage controlled oscillator connect successively.
The beneficial effects of the utility model: the current transformer that (1) inversion feedback type regenerating braking energy absorption plant adopts power device IGBT to realize has that dynamic property is good, harmonic content is low and the advantage such as control method is flexible;
(2) device AC network side adopts active filter, and harmonic content is little, little to harmonic pollution in electric power net;
(3) Active Power Filter-APF adopted in device carries out filtering, it can not only pass through sampling load current and carry out each harmonic to be separated with idle, control and the size of active output current, frequency and phase place, and respond fast, phase induced current in payment load, achieve dynamic tracing compensation, and not only can mend harmonic wave but also mend idle and uneven, it can also carry out quick tracing compensation to the harmonic wave of different size and frequency, dynamic current compensates harmonic carcellation and improves power factor, can effectively reduce harmonic wave at cable, switch, heating in transformer, the power-off fault that minimizing harmonic wave causes and time, significantly improve power utilization rate, reduce operation cost,
(4) this rating of set factor is high, and can not change because feedback power changes, therefore can reduce the cost of reactive power compensating apparatus;
(5) inversion feedback device takes full advantage of the regenerating braking energy of train, good energy-conserving effect, also reduce the capacity of train braking resistance simultaneously, pressure ring net in regenerative braking energy feedback to interchange, both do not want absorption resistance, need not configure energy-storage travelling wave tube yet, less to ambient temperature effect like this, solve current subway ubiquitous tunnel problem of temperature rise, meet national energy-saving reduction of discharging, low-carbon environment-friendly policy.
Accompanying drawing explanation
The utility model is described in detail below in conjunction with the drawings and specific embodiments;
Fig. 1 is theory diagram of the present utility model;
Fig. 2 is the circuit diagram of the utility model PWM type inverter;
Fig. 3 is the fundamental diagram of the utility model phase-locked loop;
Fig. 4 is place in circuit figure of the present utility model.
Embodiment
The technological means realized for making the utility model, creation characteristic, reaching object and effect is easy to understand, below in conjunction with embodiment, setting forth the utility model further.
With reference to Fig. 1-4, this embodiment is by the following technical solutions: subway inversion feedback type regenerating braking energy absorption plant, comprise PWM type inverter 1, Active Power Filter-APF 2, isolating transformer 3, rectifier transformer 4 and voltage regulator controllers 5, PWM type inverter 1 accesses train braking energy, PWM type inverter 1, Active Power Filter-APF 2, isolating transformer 3, rectifier transformer 4 connects successively, rectifier transformer 4 feedback link is to electrical network, isolating transformer 3 effectively prevent a certain brachium pontis of PWM type inverter 1 be short-circuited fault time, the direct current this situation of direct AC system that fails to be convened for lack of a quorum occurs, just ensure like this that direct current can not enter in the middle of AC system, PWM type inverter 1 is also connected with voltage regulator controllers 5 by signal processing unit 6, voltage regulator controllers 5 is connected with drive circuit 7 by SPWM, drive circuit 7 connects PWM type inverter 1.
It should be noted that, the inverter bridge that described PWM type inverter 1 is made up of six insulated gate bipolar transistors forms, the gate pole of the first insulated gate bipolar transistor IGBT 1-the 6th insulated gate bipolar transistor IGBT 6 all connects drive circuit 7, first insulated gate bipolar transistor IGBT 1, 3rd insulated gate bipolar transistor IGBT 3, the collector electrode of the 5th insulated gate bipolar transistor IGBT 5 all connects positive source, first insulated gate bipolar transistor IGBT 1, 3rd insulated gate bipolar transistor IGBT 3, the emitter of the 5th insulated gate bipolar transistor IGBT 5 connects the 4th insulated gate bipolar transistor IGBT 4 respectively, 6th insulated gate bipolar transistor IGBT 6, the collector electrode of the second insulated gate bipolar transistor IGBT 2, 4th insulated gate bipolar transistor IGBT 4, 6th insulated gate bipolar transistor IGBT 6, the emitter of the second insulated gate bipolar transistor IGBT 2 all connects power cathode, the first diode D1-the 6th diode D6 is connected to respectively between the emitter of the first insulated gate bipolar transistor IGBT 1-the 6th insulated gate bipolar transistor IGBT 6 and collector electrode.
It should be noted that, described Active Power Filter-APF 2 comprises for dynamic harmonic wave, the novel electric power electric device of compensating reactive power, can not only sampling load current be passed through and carry out each harmonic to be separated with idle, control and the size of active output current, frequency and phase place, and respond fast, offset phase induced current in load, achieve dynamic tracing compensation, and not only can mend harmonic wave but also mend idle and uneven, it can also carry out quick tracing compensation to the harmonic wave of different size and frequency, dynamic current compensates harmonic carcellation and improves power factor, can effectively reduce harmonic wave at cable, switch, heating in transformer, the power-off fault that minimizing harmonic wave causes and time, significantly improve power utilization rate, reduce operation cost, moreover, also can improve the quality of power supply comprehensively, the filter effect of Active Power Filter-APF 2 is not by system impedance variable effect, and energy self-restration system resonance, according to distribution structure, local equalize, partial-compensation can be selected or always compensate.
It should be noted that, described voltage regulator controllers 5 adopts digital proportional integral PI controller, the amplitude of regulation output voltage in real time, with practical requirement, three-phase current feedback is returned the circuit measuring element of the three-phase alternating current after inversion by voltage regulator controllers 5, compare with given reference current signal, the error signal obtained regulates through pi regulator, signal after adjustment sends into PWM type inverter 1, be used for the modulated sinusoid amplitude of control PWM type inverter 1, the PWM ripple that PWM type inverter 1 produces controls again the IGBT conducting of inverter circuit power device and shutoff, thus realize voltage regulation function.
In addition, described subway inversion feedback type regenerating braking energy absorption plant also comprises phase-locked loop, and phase-locked loop is made up of phase comparator 8, low pass filter 9, voltage controlled oscillator 10, and phase comparator 8, low pass filter 9, voltage controlled oscillator 10 connect successively.
Its phase-locked loop of this embodiment is used to the phase place during 35kV side A phase voltage zero crossing locking rectifier transformer 4, input signal V1 (t) sent here when the outside control signal different with phase place from V0 (t) the two-way frequency exported by voltage controlled oscillator is sent to phase comparator, V2 (t) signal exports control voltage signal V3 (t) that is equivalent to V2 (t) signal averaging after low pass filter process, voltage controlled oscillator will adjust frequency and the phase place of its output signal V0 (t) under the control of V3 (t) signal, the difference on the frequency between control signal V0 (t) and input signal V1 (t) and phase difference is made to be zero, whole control ring enters lock-out state, after phase-locked loop enters lock-out state, voltage controlled oscillator can make its output signal V0 (t) frequency follow the tracks of rapidly the frequency change of input signal V1 (t), meet the requirement of rapidity and accuracy.
This embodiment provides a kind of PWM control technology, comprise stagnant ring manner of comparison and triangle wave mode, stagnant ring manner of comparison passes through hysteresis comparator with specified current flow after every phase current feedback is returned, obtain the switching drive signal of inverter, allow the change of current tracking specified current flow of actual output, but this has larger impact to tracking performance: when ring width is wide, switch motion frequency is low, and tracking error increases; When ring width is narrow, tracking error is less, but the operating frequency of switch is too high, and switching loss increases thereupon, and the shortcoming of the method is that the switching frequency change of inverter creates more serious noise, and the current harmonic content of output is many; Triangle wave mode is compared by actual output current and instruction electric current, obtain current deviation, after amplifier amplifies, compare with triangle carrier signal, obtain PWM ripple, the switching frequency of device for power switching is equal with triangular carrier frequency, overcome stagnant ring manner of comparison and bring the unfixed shortcoming of inverter switching frequency, amplifier has proportional integral characteristic usually, and its coefficient directly affects the current tracking characteristic of inverter circuit, and such output current harmonics content is few.
This embodiment is after inversion feedback device starts, first according to startup sequential, each circuit breaker, contactor are closed, device is made to enter holding state, when device detects that DC bus-bar voltage exceeds set point (DC1680V), pwm pulse signal can be opened at once, control inverter power device IGBT, make its work, inverter circuit is started working, by quick adjustment Absorption Current, by voltage stabilization at set point (DC1680V), guarantee metro traction power system safe and stable operation.
As shown in Figure 4, the DC side of inversion feedback type regenerating braking energy absorption plant is linked on DC bus by direct current quick breaker, AC is connected with rectifier transformer secondary delta windings, device judges according to busbar voltage change, under determining that running train has been in regenerative braking operating mode, plant running, according to the size of gauze Regenerative feedback electric current, the Absorption Current of automatic adjustment inversion feedback device, realize stable DC busbar voltage, the energy produced during train regenerative braking is fed back to pressure ring net in AC35kV by rectifier transformer by inversion feedback device, for other loads, when after running train end of braking, regenerating braking energy has absorbed and has impelled DC bus-bar voltage to fall back to adjust below magnitude of voltage, inversion feedback device is by out of service, enter holding state.
This embodiment dynamic property is good, and control method is flexible, little to harmonic pollution in electric power net, significantly improves power utilization rate, reduces operation cost, good energy-conserving effect, meets national energy-saving reduction of discharging, low-carbon environment-friendly policy, has wide market application foreground.
More than show and describe general principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (4)
1. subway inversion feedback type regenerating braking energy absorption plant, it is characterized in that, comprise PWM type inverter (1), Active Power Filter-APF (2), isolating transformer (3), rectifier transformer (4) and voltage regulator controllers (5), PWM type inverter (1) access train braking energy, PWM type inverter (1), Active Power Filter-APF (2), isolating transformer (3), rectifier transformer (4) connects successively, rectifier transformer (4) feedback link is to electrical network, PWM type inverter (1) is also connected with voltage regulator controllers (5) by signal processing unit (6), voltage regulator controllers (5) is connected with drive circuit (7) by SPWM, drive circuit (7) connects PWM type inverter (1).
2. subway inversion feedback type regenerating braking energy absorption plant according to claim 1, it is characterized in that, the inverter bridge that described PWM type inverter (1) is made up of six insulated gate bipolar transistors forms, the gate pole of the first insulated gate bipolar transistor (IGBT1)-six insulated gate bipolar transistor (IGBT6) all connects drive circuit (7), first insulated gate bipolar transistor (IGBT1), 3rd insulated gate bipolar transistor (IGBT3), the collector electrode of the 5th insulated gate bipolar transistor (IGBT5) all connects positive source, first insulated gate bipolar transistor (IGBT1), 3rd insulated gate bipolar transistor (IGBT3), the emitter of the 5th insulated gate bipolar transistor (IGBT5) connects the 4th insulated gate bipolar transistor (IGBT4) respectively, 6th insulated gate bipolar transistor (IGBT6), the collector electrode of the second insulated gate bipolar transistor (IGBT2), 4th insulated gate bipolar transistor (IGBT4), 6th insulated gate bipolar transistor (IGBT6), the emitter of the second insulated gate bipolar transistor (IGBT2) all connects power cathode, the first diode (D1)-six diode (D6) is connected to respectively between the emitter of the first insulated gate bipolar transistor (IGBT1)-six insulated gate bipolar transistor (IGBT6) and collector electrode.
3. subway inversion feedback type regenerating braking energy absorption plant according to claim 1, is characterized in that, described voltage regulator controllers (5) adopts digital proportional integral PI controller.
4. subway inversion feedback type regenerating braking energy absorption plant according to claim 1, it is characterized in that, braking energy absorption plant also comprises phase-locked loop, phase-locked loop is made up of phase comparator (8), low pass filter (9), voltage controlled oscillator (10), and phase comparator (8), low pass filter (9), voltage controlled oscillator (10) connect successively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520191144.XU CN204597496U (en) | 2015-03-31 | 2015-03-31 | Subway inversion feedback type regenerating braking energy absorption plant |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520191144.XU CN204597496U (en) | 2015-03-31 | 2015-03-31 | Subway inversion feedback type regenerating braking energy absorption plant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107124009A (en) * | 2017-04-27 | 2017-09-01 | 西安许继电力电子技术有限公司 | A kind of inverse type subway Way of Regenerating Energy Feedback device |
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- 2015-03-31 CN CN201520191144.XU patent/CN204597496U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107124009A (en) * | 2017-04-27 | 2017-09-01 | 西安许继电力电子技术有限公司 | A kind of inverse type subway Way of Regenerating Energy Feedback device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150826 Termination date: 20160331 |