CN203119680U - Test system of flywheel storage energy device - Google Patents
Test system of flywheel storage energy device Download PDFInfo
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- CN203119680U CN203119680U CN 201220730760 CN201220730760U CN203119680U CN 203119680 U CN203119680 U CN 203119680U CN 201220730760 CN201220730760 CN 201220730760 CN 201220730760 U CN201220730760 U CN 201220730760U CN 203119680 U CN203119680 U CN 203119680U
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- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
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Abstract
The utility model discloses a test system of a flywheel storage energy device. The test system comprises a power source, a test control unit, a flow transformation unit and a controller unit, wherein the test control unit comprises a switching control circuit used for inhibiting impact current, a discharging control circuit used for feeding back flywheel storage energy to a motor, and an alternating current load subunit used for detecting practical on-load capacity of equipment, the flow transformation unit comprises a direct current bus capacitor set, a power module and an alternating current filter reactor, and the controller unit is used for providing switch signals for an IGBT power module in a current transformer and an electric power transistor in the discharging control circuit and providing control signals for an alternating current load relay in the alternating current load subunit and a direct current contactor in the switching control circuit. Controllable rectification control is employed when the system discharges, multiple effective fault and overload protection measurements are further employed, so requirements of key technology performance test researches of flywheel storage energy systems of different power grades under continuous charging and discharging conditions can be met.
Description
Technical field
The utility model relates to the flywheel energy storage technical field, is specifically related to a kind of test macro of energy accumulation device for fly wheel.
Background technology
The flywheel energy storage technology is that the flywheel with at a high speed rotation is carrier, electric energy is changed in the flywheel that mechanical energy is stored in rotation at a high speed the storage and the release that realize electric energy by raising speed and the reduction of speed of flywheel and motor.
Flywheel current develops towards super large energy storage capacity, powerful direction, how further to reduce the power consumption of energy-storing flywheel system, improves the fail safe of system and the challenge that reliability becomes the development of restriction flywheel.The test macro of the high-power energy accumulation device for fly wheel of one cover has important theory and practice significance for problems such as the stability of research flywheel energy storage system charge-discharge system, dynamo-electric parameter matching.
Traditional flywheel energy storage system testing apparatus charging experiment and discharge test separately carry out, charging process drives flywheel by frequency converter and realizes the energy storage charging process, flywheel charging energy stored consumes the primary power in the time of can't discharging as flywheel by brake resistance; Discharge test is to drag realization by frequency converter or with the coaxial motor of fly-wheel motor passive, and this moment, fly-wheel motor ran on fourth quadrant, and is different with the actual condition that actual flywheel discharge operates in second quadrant.The charging of traditional energy accumulation device for fly wheel and discharge running are discontinuous, the energy of fly wheel system energy storage can't pass through the frequency converter feedback, be unsuitable for the research of energy conversion efficiency, efficiency for charge-discharge, state-of-charge SOC and the key technology performances such as depth of discharge DOD, idling loss of flywheel energy storage system, also be not suitable for the flywheel energy storage system long-time continuous and discharge and recharge runnability research.
The utility model content
The purpose of this utility model is to overcome the defective that exists in the prior art, provides a kind of flywheel that guarantees to discharge and recharge the test macro of the energy accumulation device for fly wheel of need of work continuously under the different loads condition.
For achieving the above object, the technical solution of the utility model is the test macro of a kind of energy accumulation device for fly wheel of design, and described test macro comprises: power supply, unit of testing and controlling, current transforming unit and controller unit is characterized in that:
Described unit of testing and controlling comprises for the switching control circuit that suppresses impulse current, be used for that flywheel energy storage fed back to the charge/discharge control circuit of motor and for detection of the AC load subelement of the actual load capacity of equipment;
Described current transforming unit comprises dc-link capacitance device group, power model and ac filter reactor;
Described controller unit is used in insulated gate bipolar transistor (IGBT) power model in the current transformer and the charge/discharge control circuit to power transistor provides switching signal, and provides control signal for the AC load relay in the AC load subelement and the D.C. contactor in the switching control circuit.
Wherein optimized technical scheme is: described dc-link capacitance device group is by being parallel between the dc bus both positive and negative polarity after the some groups of alminium electrolytic condenser series connection;
Described power model constitutes half-bridge module by 6 groups of IGBT switching tubes, the S in the IGBT switching tube
1With S
4, S
2With S
5, S
3With S
6The 1st, 2 and 3 brachium pontis of forming current transformer respectively; S
1With S
4, S
2With S
5, S
3With S
6Intermediate point as ac output end;
The DC side of described power model and the capacitor group dc bus that inserts in parallel, it exchanges side by the three phase windings corresponding connection of filter reactor with fly-wheel motor.
Optimized technical scheme also comprises: described switching control circuit is made up of two D.C. contactors and pre-charge resistance, two D.C. contactors are serially connected with respectively on the dc bus both positive and negative polarity, be parallel to the D.C. contactor two ends after pre-charge resistance and the fuse series connection, be connected to the DC side positive input terminal of current transformer, the power on/off of contactor is controlled by described controller unit;
Described discharge control unit comprises power transistor and the water-cooled DC load case of connecting with it, and the DC load case is used for absorbing fly-wheel motor feeds back to bus when generator operation energy;
Described AC load subelement comprises AC load relay and the water-cooled AC load case of connecting with it, and water-cooled AC load case is used for the checkout equipment of fly-wheel motor actual load capacity when generator operation.
Optimized technical scheme also comprises, respectively is connected with a fast acting fuse between the dc bus positive and negative electrode between the uncontrollable rectifier bridge of the three-phase of described power supply and the switching control unit.
Optimized technical scheme also comprises, is parallel with film capacitor between the dc bus both positive and negative polarity of described switching control circuit, between the dc bus positive and negative electrode between described film capacitor and the charge/discharge control circuit, be parallel with dynamic brake its; Described dynamic brake comprises dynamic brake unit and brake resistance.
Optimized technical scheme also has, and described controller unit comprises: data acquisition unit, for DC bus-bar voltage and the dc bus current signal of stator phase current, flywheel rotor rotating speed and the current transformer of gathering fly-wheel motor;
Data processing unit is used for discharging and recharging control strategy according to flywheel the signal that signal gathering unit collects is carried out computing, output pulse width modulation (PWM) control signal, contactor and relay control signal;
Driver element, be used for to the pwm signal of described IGBT and the power transistor switching signal is isolated and power amplification after export, with the break-make of power transistor in IGBT device for power switching and the charge/discharge control circuit in the control current transformer.
The technical solution of the utility model can be implemented in the continuous charge-discharge test of high-power flywheel energy storage system under the different loads condition.
In charging process, at first through three-phase regulator the charge power of system to be adjusted, three-phase alternating current is through entering the switching control circuit of dc bus after the uncontrollable rectification of diode; Fly wheel system is at the initial stage of powering on, and by the cooperation of the pre-charge resistance in the switching control circuit and D.C. contactor, the impulse current that inhibition powers on is to the impact of rectification original paper and power supply; After finishing pre-charge process, rectifier power source is access in dc bus, produce corresponding charging drive current by the high-performance digital signal processor in the controller unit (DSP) control algolithm of will charging again, by the PWM inversion pulse control to current transformer, with IGBT device for power switching in the control current transformer, finish the constant current charge process of flywheel energy storage system;
After the flywheel energy storage system charging process is finished, flywheel reaches rated speed, and this moment, flywheel energy storage system entered the idle state of high speed, and the main loss of flywheel operation is from the idling loss of self, required power reduces, and flywheel energy storage system will maintain the high-speed cruising state.
Adjust the flywheel energy storage system control strategy by controller and enter the discharge control procedure, cooperate contactor and relay to turn-off control signal, realize stable energy regeneration processes.During the discharge beginning, controller provides the shutoff control signal to the D.C. contactor in the switching control circuit, and power supply no longer provides energy to flywheel energy storage system.Simultaneously, controller by driving control unit with power transistor conducting in the charge/discharge control circuit, for feedback energy provides discharge channel.Along with the excision of external charging power supply, fly-wheel motor will enter second quadrant and be in the generator operation state, and along with the reduction of rotating speed, the flywheel energy storage system energy stored is carried out stable discharging by discharge load after through the current transformer rectification.High-performance digital signal processor DSP in the controller control algolithm of will discharging produces corresponding charging drive current, by the PWM commutating pulse control to current transforming unit, with IGBT device for power switching in the control current transformer, finish the stable discharging process of flywheel energy storage system.
If the energy of discharge loop feedback surpasses the capacity of DC load, controller will be exported the AC load relay in the control signal adhesive AC load unit, and excessive feedback energy will partly or entirely be carried out the bypass discharge by exchanging the case load box.AC load also can be used as the checkout equipment of fly-wheel motor actual load capacity when generator operation.
Advantage of the present utility model and beneficial effect are:
(1) the utility model adopts the control of PWM controlled rectification when energy accumulation device for fly wheel discharges, omitted the buck control circuit of chopping, reduce harmonic current and the high frequency ripple of rectification input side under the flywheel generating operation mode, improved power factor and the energy conversion efficiency of flywheel energy storage system.
(2) built-in transducer, alternating current-direct current load and the high performance digital processing unit of the utility model, can comprise the testing research of the multiple key technology performance of energy conversion efficiency, efficiency for charge-discharge, state-of-charge SOC and depth of discharge DOD, idling loss etc. to the flywheel energy storage system of different capacity grade, be applicable to that also the flywheel energy storage system long-time continuous discharges and recharges the runnability testing research.
(3) the utility model is taked multiple effective fault and overload protection measure.The dc bus fast acting fuse carries out short-circuit protection to the uncontrollable rectifier bridge of three-phase; AC fuse is carried out short-circuit protection or serious overload protection; the dynamic brake unit carries out overvoltage protection, overcurrent protection and overheat protector to test platform, and the AC load unit provides the energy back channel for fly-wheel motor when DC load case overload or current transformer fault.
Description of drawings
Fig. 1 is the test macro schematic diagram of the utility model energy accumulation device for fly wheel;
Fig. 2 is the structural representation of current transformer and controller among Fig. 1.
Among the figure: 1, power supply; 2, switching control circuit; 3, charge/discharge control circuit; 4, power model; 5, fly-wheel motor; 6, flywheel; 7, AC load unit; 8, dynamic brake unit; 9, controller unit, SO, power transistor; R
Rch, pre-charge resistance; KM
1~ KM
2, D.C. contactor; KM
3, A.C. contactor; FU
1~ FU
7, fuse; R
L, water-cooled DC load case; R
Ac, water-cooled AC load case; R
Dis, brake resistance; C
1~ C
21, capacitor; C
22, C
23, film capacitor; S
1~ S
6, the IGBT switching tube.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is further described.Following examples only are used for the technical solution of the utility model more clearly is described, and can not limit protection range of the present utility model with this.
As shown in Figure 1, 2, the utility model is a kind of test macro of energy accumulation device for fly wheel, and this system comprises: power supply 1, unit of testing and controlling, current transforming unit and controller unit.
Power supply comprises interconnective three-phase alternating-current supply UVW, three-phase automatic coupling voltage regulator, three-phase breaker and the uncontrollable rectifier bridge of three-phase.
Unit of testing and controlling comprises switching control circuit 2, charge/discharge control circuit 3 and AC load subelement 7; Wherein:
Switching control circuit 2 is by D.C. contactor KM
1, KM
2With pre-charge resistance R
RchForm KM
1, KM
2Be serially connected with the dc bus both positive and negative polarity respectively, pre-charge resistance R
RchWith fuse FU
3Be parallel to D.C. contactor KM after the series connection
1Two ends are connected to the DC side positive input terminal of current transformer, and the contactor power on/off is by controller unit 9 controls; Charge/discharge control circuit 3 comprises power transistor SO and the water-cooled DC load case R that connects with it
L, water-cooled DC load case R
LThe energy that fly-wheel motor feeds back to bus when the generator operation will be absorbed; AC load unit 7 comprises AC load relay K M
3Chuan Lian water-cooled AC load case R with it
Ac, AC load case R
AcCheckout equipment as fly-wheel motor actual load capacity when the generator operation.Between the uncontrollable rectifier bridge of three-phase and switching control circuit 2, respectively be connected with a fast acting fuse FU
1, FU
2, can effectively three-phase not controlled rectifier bridge and carry out short-circuit protection; Between the dc bus both positive and negative polarity between switching control circuit 2 and the charge/discharge control circuit 3, be parallel with film capacitor C
22, C
23With fuse FU
4, can effectively absorb DC bus-bar voltage ripple and current ripples; At film capacitor C
1, C
2And between the dc bus positive and negative electrode between the charge/discharge control circuit 3, be parallel with dynamic brake unit 8; Described dynamic brake comprises dynamic brake unit and brake resistance R
DisIts operation voltage is adjustable, can effectively carry out overvoltage protection, overcurrent protection and overheat protector to test macro;
As depicted in figs. 1 and 2, current transforming unit comprises dc-link capacitance device group C, power model 4 and ac filter reactor Ls.Wherein:
Dc-link capacitance device group C is by some groups of alminium electrolytic condenser C
1~ C
18Be parallel to the dc bus both positive and negative polarity by laminated bus bar after the series connection; Between the both positive and negative polarity of each electric capacity of dc-link capacitance device group C, be parallel with cement grading resistor R
1~ R
18, it can effectively utilize voltage divider principle to guarantee to make each capacitor C
1~ C
18Top voltage equalization; 6 groups of power model 4 constitute half-bridge module, IGBT switching tube S by the IGBT switching tube
1With S
4, S
2With S
5, S
3With S
6Form the 1st, 2 and 3 brachium pontis of current transformer respectively, the driving signal of upper and lower bridge arm comes self-controller to be respectively A+, A-, B+, B-, C+, C-; S
1With S
4, S
2With S
5, S
3With S
6Intermediate point respectively as the output point that exchanges side ABC three-phase; Power model 4 DC side insert dc bus by dc-link capacitance device C group, exchange side by the three phase windings corresponding connection of filter reactor Ls with fly-wheel motor 5, and system drive motor and flywheel 6 are connected same main shaft; Positive and negative end at the upper and lower brachium pontis of IGBT is parallel with surge absorber capacioor C
19~ C
21, can effectively sponge peak voltage, eliminate because the peak voltage that the stray inductance of busbar causes is avoided the damage of insulated gate bipolar transistor IGBT; Between power model 4 interchange output points and AC reactor Ls, be connected with AC fuse FU respectively
5~ FU
7, can effectively carry out short-circuit protection or serious overload protection to flywheel energy storage system.
IGBT driver in the present embodiment be Switzerland CONCEPT company specially for the application of high reliability design drive the 2SC0435T of kernel based on SCALE-2, can drive 1700V with interior IGBT, support the switching frequency of 100kHZ, support directly in parallel the driving.IGBT adopts high-performance the 4th generation IGBT half-bridge module FF900R12IP4 of German INFINEON, and current transformer power can arrive 300kW, can satisfy the testing requirement of the flywheel energy storage system of different capacity grade.
Controller unit 9 is that power transistor SO provides switching signal in IGBT device for power switching in the current transformer and the charge/discharge control circuit, and for the AC load relay in the AC load unit and the D.C. contactor in the switching control circuit provide control signal, it comprises: data acquisition unit, data processing unit and driver element; Wherein:
Data acquisition unit be used for to be gathered signals such as the DC bus-bar voltage of stator phase current, flywheel rotor rotating speed and current transformer of fly-wheel motor and dc bus current; Data processing unit is used for discharging and recharging control strategy according to flywheel the signal that signal gathering unit collects is carried out computing, output pwm control signal, contactor and relay control signal; Driver element, be used for to described IGBT pwm signal and power transistor SO switching signal is isolated and power amplification after export, with the break-make of power transistor in the IGBT device for power switching in the control current transforming unit and the charge/discharge control circuit.
The above only is preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model know-why; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (6)
1. the test macro of an energy accumulation device for fly wheel, described test macro comprises: power supply, unit of testing and controlling, current transforming unit and controller unit is characterized in that:
Described unit of testing and controlling comprises for the switching control circuit that suppresses impulse current, be used for that flywheel energy storage fed back to the charge/discharge control circuit of motor and for detection of the AC load subelement of the actual load capacity of equipment;
Described current transforming unit comprises dc-link capacitance device group, power model and ac filter reactor;
Described controller unit is used in IGBT power model in the current transformer and the charge/discharge control circuit to power transistor provides switching signal, and provides control signal for the AC load relay in the AC load subelement and the D.C. contactor in the switching control circuit.
2. the test macro of energy accumulation device for fly wheel as claimed in claim 1 is characterized in that:
Described dc-link capacitance device group is by being parallel between the dc bus both positive and negative polarity after the some groups of alminium electrolytic condenser series connection;
Described power model constitutes half-bridge module by 6 groups of IGBT switching tubes, the S in the IGBT switching tube
1With S
4, S
2With S
5, S
3With S
6The 1st, 2 and 3 brachium pontis of forming current transformer respectively; S
1With S
4, S
2With S
5, S
3With S
6Intermediate point as ac output end;
The DC side of described power model and the capacitor group dc bus that inserts in parallel, it exchanges side by the three phase windings corresponding connection of filter reactor with fly-wheel motor.
3. the test macro of energy accumulation device for fly wheel as claimed in claim 1 is characterized in that:
Described switching control circuit is made up of two D.C. contactors and pre-charge resistance, two D.C. contactors are serially connected with respectively on the dc bus both positive and negative polarity, be parallel to the D.C. contactor two ends after pre-charge resistance and the fuse series connection, be connected to the DC side positive input terminal of current transformer, the power on/off of contactor is controlled by described controller unit;
Described discharge control unit comprises power transistor and the water-cooled DC load case of connecting with it, and the DC load case is used for absorbing fly-wheel motor feeds back to bus when generator operation energy;
Described AC load subelement comprises AC load relay and the water-cooled AC load case of connecting with it, and water-cooled AC load case is used for the checkout equipment of fly-wheel motor actual load capacity when generator operation.
4. the test macro of energy accumulation device for fly wheel as claimed in claim 1 is characterized in that:
Between the dc bus positive and negative electrode between the uncontrollable rectifier bridge of the three-phase of described power supply and the switching control unit, respectively be connected with a fast acting fuse.
5. the test macro of energy accumulation device for fly wheel as claimed in claim 1 is characterized in that:
Between the dc bus both positive and negative polarity of described switching control circuit, be parallel with film capacitor, between the dc bus positive and negative electrode between described film capacitor and the charge/discharge control circuit, be parallel with dynamic brake its; Described dynamic brake comprises dynamic brake unit and brake resistance.
6. the test macro of energy accumulation device for fly wheel as claimed in claim 1 is characterized in that,
Described controller unit comprises: data acquisition unit, for DC bus-bar voltage and the dc bus current signal of stator phase current, flywheel rotor rotating speed and the current transformer of gathering fly-wheel motor;
Data processing unit is used for discharging and recharging control strategy according to flywheel the signal that signal gathering unit collects is carried out computing, output pwm control signal, contactor and relay control signal;
Driver element, be used for to the pwm signal of described IGBT and the power transistor switching signal is isolated and power amplification after export, with the break-make of power transistor in IGBT device for power switching and the charge/discharge control circuit in the control current transformer.
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|---|---|---|---|
| CN 201220730760 CN203119680U (en) | 2012-12-26 | 2012-12-26 | Test system of flywheel storage energy device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220730760 CN203119680U (en) | 2012-12-26 | 2012-12-26 | Test system of flywheel storage energy device |
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| CN104210675A (en) * | 2014-08-28 | 2014-12-17 | 中国科学院长春光学精密机械与物理研究所 | Capacitive energy conversion braking method for reaction flywheel |
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| CN110182053A (en) * | 2019-06-04 | 2019-08-30 | 中电建路桥集团有限公司 | A kind of magnetic levitation energy storage flywheel energy brake protection system |
| CN110182053B (en) * | 2019-06-04 | 2021-03-12 | 中电建路桥集团有限公司 | Magnetic suspension energy storage flywheel energy braking protection system |
| CN110488113A (en) * | 2019-07-10 | 2019-11-22 | 平高集团有限公司 | A kind of flywheel energy storage system experimental test platform |
| CN114152850A (en) * | 2020-08-19 | 2022-03-08 | 华中科技大学 | Dynamic testing device for testing switch performance of power module |
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