CN201742107U - Power quality regulating device based on stored energy of super capacitor - Google Patents
Power quality regulating device based on stored energy of super capacitor Download PDFInfo
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- CN201742107U CN201742107U CN2010202849778U CN201020284977U CN201742107U CN 201742107 U CN201742107 U CN 201742107U CN 2010202849778 U CN2010202849778 U CN 2010202849778U CN 201020284977 U CN201020284977 U CN 201020284977U CN 201742107 U CN201742107 U CN 201742107U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The utility model relates to a power quality regulating device based on stored energy of a super capacitor, which belongs to technical field of the regulation of power quality. The device is characterized by comprising a super capacitor 5, a bidirectional direct current (DC/DC) converter 4 and a three-phase voltage pulse-width modulation (PWM) rectifier 3, wherein the super capacitor 5 is connected to the low-voltage side of the bidirectional DC/DC converter 4; the high-voltage side of the bidirectional DC/DC converter 4 is connected to the direct-current side of the three-phase voltage pulse-width modulation (PWM) rectifier 3; and the alternating-current side of the three-phase voltage pulse-width modulation (PWM) rectifier 3 is connected in parallel with a network system 1. In the device, the three-phase voltage pulse-width modulation (PWM) rectifier 3 can realize decoupling control of active power and reactive power under a dq rotary coordinate system; and the bidirectional DC/DC converter 4 adopts BUCK-BOOST type bidirectional DC/DC converter structure and voltages and current at two ends can be controlled accurately by changing the duty ratio of a switching tube of the converter. The device has the advantages that: due to the adoption of simple equipment structure, active, reactive and harmonic compensation and low voltage ride through are realized; and the super capacitor 5 has long service life and the operating cost is lowered.
Description
Technical field
The utility model belongs to quality of power supply regulation technology field.Relate to a kind of new electric energy quality regulator that adds ultracapacitor and insert network system by parallel way, the quality of power supply to network system is regulated, particularly the compound mode of the Three-phase PWM Voltage Rectifier in this device, two-way DC/DC converter, ultracapacitor and Three-phase PWM Voltage Rectifier, two-way DC/DC converter composition structure separately and normally move in network system, the controlling Design during the network system failure operation.
Background technology
Along with national economy and rapid development of science and technology, various power electronic equipments are used widely, and must make all trades and professions that the demand of electric energy is being increased, and power department and user also increase day by day to the concern of the quality of power supply.
Resistance sense loads in industry and the household electricity occupies very big ratio, the resistance sense load must absorbing reactive power the ability operate as normal, this is determined by itself character.Asynchronous motor in the electric power system, transformer, various phased device are adjusted circuit and cycloconvertor as phase controlled rectifier, phased AC power, all will consume a large amount of reactive powers when work.Simultaneously, in electric power system, when load had nonlinear characteristic, electric current will contain harmonic wave, and waveform will distort, and becomes the non-sinusoidal waveform that contains harmonic wave.The main harmonic source that causes Harmonious Waves in Power Systems has: the non-linear exciter of power transformer; The harmonic wave that turning motor causes; The wave distortion that arc furnace causes; The harmonic wave that electric railway causes; The harmonic wave that each power electronic equipment produces.
The existence of the profit and loss of reactive power and harmonic current is as follows to the harm that electric power system brings in the electric power system: the loss of power equipment and circuit is also increased thereupon; Can make line voltage produce violent fluctuation, have a strong impact on power supply quality; The operate as normal of the various electric equipments of harmonic effects, the efficient of reduction generating, transmission of electricity and power consumption equipment; Harmonic wave can cause parallel resonance and series resonance local in the utility network, thereby harmonic wave is amplified, and causes serious accident; Harmonic wave can cause the misoperation of relaying protection and automatics.In recent years, along with the continuous development of renewable energy technologies especially wind generating technology, wind-powered electricity generation installed capacity and energy output increase considerably.Wind farm grid-connected operation is to realize the extensive effective means of utilizing of wind energy, but Power Output for Wind Power Field has uncontrollable and can not expection property.The wind-powered electricity generation unit capacity of admitting in electric power system surpasses certain proportion, and the fluctuating power of wind-powered electricity generation output is bringing a series of technical barrier to grid-connected system aspect the qualities of power supply such as the harmonic wave of the reactive power of electric power system, electrical network and flickering.This shows that traditional Static Var Compensator has more and more important meaning aspect the safety of modern power systems, the stable operation.
The difference of wind power generator incorporated in power network and other the equipment that generates electricity by way of merging two or more grid systems maximum is that it can not keep the voltage and the frequency of electrical network during electric network fault, and this stability to electric power system is very unfavorable.When wind-powered electricity generation occupies larger specific gravity in electrical network, if blower fan is still taked passive protection off-the-line when electric voltage dropping, then can increase the fault recovery difficulty of whole system, even may aggravate fault, finally cause the whole off-the-lines of other units of system.Various countries' grid company has proposed strict specification requirement according to self reality to wind energy turbine set wind-powered electricity generation set grid-connection for this reason, comprising low voltage ride-through capability, promptly refer to be incorporated into the power networks when point voltage falls at blower fan, blower fan can keep being incorporated into the power networks, even provide certain reactive power to electrical network, support power system restoration, normal up to power system restoration, thus " passing through " this low-voltage time (zone).The LVRT that country variant proposed requires to be not quite similar.For example, the low voltage ride-through capability of wind turbine generator system regulation of AWEA's formulation: before the electric voltage dropping, wind farm grid-connected point voltage maintains nominal level.The electrical network fault that is short-circuited causes electric voltage dropping during 0s, and wind energy turbine set is not less than 15% o'clock of rated voltage, and wind energy turbine set must keep being incorporated into the power networks in the 625ms time range; Return to 90% when above of rated voltage at electric network fault 3s when wind farm grid-connected point voltage in addition, wind energy turbine set must keep being incorporated into the power networks in this process.
The voltage that the parallel STATCOM of tradition relies on FEEDBACK CONTROL to keep its DC side is stablized, and realizes handling up of AC side reactive power simultaneously, can satisfy the humorous requirement that involves reactive-load dynamic compensation when electric power system normally moves.When the wind-electricity integration system was short-circuited fault, the decline of line voltage, practice showed Voltage loop control fails this moment, caused STATCOM can't send a large amount of reactive powers to support line voltage.If will guarantee STATCOM operate as normal when electrical network breaks down, must provide stable dc voltage to it, this can keep its dc voltage by the irrelevant supply unit of extra increase by one cover and line voltage when electrical network breaks down stable, but the redundancy that can cause equipment is with idle.
For addressing the above problem, the utility model adds ultracapacitor and control system thereof with the DC side of traditional STATCOM device.By the switching of control mode, to the different demands of reactive power, improve the quality of power supply when making this device can satisfy electrical network normally to move with failure operation, when improving safe operation of electric network stability, effectively reduce cost of investment.
Summary of the invention
The technical problems to be solved in the utility model is: the deficiency that overcomes traditional STATCOM device, design a kind of quality of power supply adjusting device that adds energy storage device, make it when electrical network normally moves, when can satisfy harmonic wave, reactive power compensation demand, also can when short trouble appears in electrical network, send a large amount of reactive powers fast, line voltage is effectively supported, improve quality of voltage, strengthen the security and stability of network system operation.During the electric network fault operation, this device needs not satisfy by external power source the reactive requirement of network system; When electrical network normally moved, this device needed and can carry out replenishing of capacity to ultracapacitor, saves extra charging device.
The technical solution of the utility model is: the quality of power supply adjusting device based on ultracapacitor energy storage is characterized in that: this device comprises ultracapacitor 5, two-way DC/DC converter 4, Three-phase PWM Voltage Rectifier 3; Wherein, ultracapacitor 5 is connected to the low-pressure side of two-way DC/DC converter 4, and the DC side of Three-phase PWM Voltage Rectifier 3 is inserted in the high-pressure side of two-way DC/DC converter 4, the parallel network system 1 that inserts of the AC side of Three-phase PWM Voltage Rectifier 3.
This quality of power supply adjusting device is characterised in that: Three-phase PWM Voltage Rectifier 3 is formed structure and is: the drain electrode of power switch pipe G3, G4, G5 connects together the positive pole of receiving dc bus capacitor C2, the source electrode of power switch pipe G3, G4, G5 is connected with the drain electrode of power switch pipe G6, G7, G8 respectively, and the source electrode of power switch pipe G6, G7, G8 connects together the negative pole of receiving dc bus capacitor C2.Sustained diode 3, D4, D5, D6, D7, D8 distinguish the leakage of inverse parallel at each power switch pipe--between the source electrode.This rectifier can Parallel Implementation active power (dc voltage) under the DQ rotating coordinate system, the accurate control of the decoupling zero of reactive power, and work in (rectification pattern, inverter mode) under the different mode by controlling Three-phase PWM Voltage Rectifier 3 flexibly to the conducting order of three-phase bridge arm switch pipe and the change of time.
This quality of power supply adjusting device is characterised in that: two-way DC/DC converter 4 is by energy storage inductor L1, power switch pipe G1, G2, sustained diode 1, D2 and output filter capacitor C1 form, the positive level of low-pressure side power supply is received the leakage level of power switch pipe G1, the source class of power switch pipe G2 through energy storage inductor L1, the source electrode of power switch pipe G1 inserts the negative level of converter, the drain electrode of power switch pipe G2 inserts the positive level of high-pressure side power supply, filter capacitor C1 is parallel to the two ends, high-pressure side, and sustained diode 1, D2 are connected in anti-parallel to the leakage of power switch pipe G1, G2--between the source class.By controlling the ON time of two switching tubes in this two-way DC/DC converter 4, the accurately voltage and the electric current of control change device high-pressure side, low-pressure side.
Since ultracapacitor 5 have have extended cycle life, failure rate is low, the characteristics that response speed is fast greatly reduce operation and maintenance cost.
The operation control strategy of this device is analyzed as follows:
When (1) network system is normally moved
Three-phase PWM Voltage Rectifier can Parallel Implementation active power and the decoupling zero control of reactive power under the DQ rotational coordinates.When network system is normally moved, Three-phase PWM Voltage Rectifier runs on rectification state, keep the stable of its dc voltage, simultaneously control AC side and network system according to demand in real time and carry out idle exchange: when the power factor of network system does not meet the demands, can control Three-phase PWM Voltage Rectifier and send corresponding reactive power and keep the constant of power factor of electric network; When the harmonic current of network system does not meet the demands, can control Three-phase PWM Voltage Rectifier and send the corresponding compensation electric current, to offset original harmonic current.Because Three-phase PWM Voltage Rectifier can be controlled the stable of its dc voltage, just can generally take the first constant current mode of constant voltage again by two-way DC/DC converter to the ultracapacitor control of charging this moment.After ultracapacitor is full of, can adopt the mode of the two-way DC/DC converter low-pressure side voltage constant of control to come to the ultracapacitor floating charge.When network system is normally moved, keep ultracapacitor to be in full state at any time, the response demand during with reply electrical network sudden short circuit fault.
When (2) network system is short-circuited fault
When network system was short-circuited fault, rapid drawdown can appear in line voltage, caused Three-phase PWM Voltage Rectifier can't keep the constant of dc voltage, and control loop before lost efficacy.At this moment, the ultracapacitor discharge, two-way DC/DC converter works in keeps the constant constant voltage output state of high side voltage, has also promptly kept the stable of Three-phase PWM Voltage Rectifier dc voltage.Three-phase PWM Voltage Rectifier then run on inverter mode according to the real-time voltage situation of electrical network, is sent reactive power in order to support the PCC point voltage, improves quality of voltage, and the shortest 625ms that keeps realizes that low-voltage passes through.
Ultracapacitor in this device generally adopts double electric layer capacitor.In use, generally a plurality of monomer ultracapacitors are formed bank of super capacitors by connection in series-parallel, improve the capacity and the withstand voltage level of ultracapacitor, make its performance satisfy actual user demand.
Effect of the present utility model and benefit are:
(1) this quality of power supply adjusting device can be carried out reactive power exchange with network system according to the ruuning situation of network system, reaches purpose idle, harmonic compensation, comprehensively improves the quality of power supply of electric power system.
(2) this quality of power supply adjusting device, when network system is short-circuited fault, can keep the stable of Three-phase PWM Voltage Rectifier dc voltage, make it send a large amount of reactive powers to support line voltage, improve quality of voltage, improve the failure operation ability of wind-electricity integration system, strengthen its security and stability.
(3) in this quality of power supply adjusting device, the energy storage device of DC side has adopted ultracapacitor, is furnished with corresponding two-way DC/DC converter simultaneously as its charging-discharging controller.Wherein, two-way DC/DC converter also can be used for ultracapacitor charging control is replenished the energy of ultracapacitor when electrical network normally moves except that the direct voltage that is used to control Three-phase PWM Voltage Rectifier when the electric network fault stable.Therefore, ultracapacitor just can carry out charging and discharging of energy by the control of this device in good time after installing, because its energy finally all comes from electrical network, therefore need not extra charging device.
(4) therefore ultracapacitor can effectively reduce operation, maintenance cost owing to have the advantage that power density is big, power response speed is fast, have extended cycle life.
(5) this quality of power supply adjusting device, the function that harmonic compensation, reactive power compensation, low-voltage are passed through rolls into one, satisfied network system operation to quality of power supply adjusting device demand in, the redundancy that effectively reduces equipment is with idle.
Description of drawings
The quality of power supply adjusting device that Fig. 1 is based on ultracapacitor energy storage inserts the network system structure chart.
Among the figure: 1 network system; 2 loads; 3 Three-phase PWM Voltage Rectifier; 4 two-way DC/DC converters; 5 ultracapacitors.
Fig. 2 is based on quality of power supply adjusting device Three-phase PWM Voltage Rectifier control block diagram when the electrical network normal operating condition of ultracapacitor energy storage.
Fig. 3 is based on quality of power supply adjusting device Three-phase PWM Voltage Rectifier control block diagram when grid failure state of ultracapacitor energy storage.
Fig. 4 is based on two-way DC/DC transformer configuration schematic diagram in the quality of power supply adjusting device of ultracapacitor energy storage.
Fig. 5 is based on Three-phase PWM Voltage Rectifier structure principle chart in the quality of power supply adjusting device of ultracapacitor energy storage.
Embodiment
Be described in detail embodiment of the present utility model below in conjunction with technical scheme and accompanying drawing.
As shown in Figure 1, the utility model inserts in the network system 1 by parallel way based on the quality of power supply adjusting device of ultracapacitor energy storage.Device is formed and is comprised: Three-phase PWM Voltage Rectifier 3, two-way DC/DC converter 4, ultracapacitor 5.Ultracapacitor 5 is connected to the low-pressure side of two-way DC/DC converter 4, and the high-pressure side of two-way DC/DC converter 4 is connected to the DC side of Three-phase PWM Voltage Rectifier 3, and the AC side of Three-phase PWM Voltage Rectifier 3 inserts in the network system 1 with parallel way.
During network system 1 normal the operation, Three-phase PWM Voltage Rectifier 3 runs on rectification state, knows according to its mathematics model analysis, and under the dq rotating coordinate system (with the leg speed rotation), its active power and reactive power can realize the parallel control of decoupling zero.Wherein, voltage (active power) control ring is used to control the stable of dc voltage, and the Reactive Power Control ring is used for sending corresponding reactive power and offset current according to network system 1 demand idle, harmonic compensation.When line voltage was directed along the q axle, the q axle component of power network current was represented real component, and d axle component is represented idle component.The q axle component of power network current is used to regulate the stable of dc voltage, and its desired value is done difference after the PI link obtains by the desired value of dc voltage measured value and dc voltage.The d axle component of power network current is used to regulate sending of reactive power, harmonic current, thereby its desired value is according to demand idle, harmonic compensation, draws via the instantaneous reactive theory.After the desired value that obtains electric current d, q axle component, change can be taked the controlled signal of classical decoupling zero control algolithm of Three-phase PWM Voltage Rectifier 3, three brachium pontis switching tubes that drive Three-phase PWM Voltage Rectifier 3 with this control signal can realize that just the control block diagram of the Three-phase PWM Voltage Rectifier 3 of this moment as shown in Figure 2 to the accurate control of dc voltage and AC side reactive power, harmonic current.Because Three-phase PWM Voltage Rectifier 3 has been kept the stable of dc voltage, so Three-phase PWM Voltage Rectifier 3 is equal to constant pressure source with respect to two-way DC/DC converter 4, according to demand Automatic Extraction active power from network system 1.This moment, two-way DC/DC converter 4 can accurately be controlled the size of low-pressure side electric current, low-pressure side voltage by the closed-loop control that adds the PI link, thereby realized ultracapacitor 5 first constant currents, the charging of back constant voltage control.
When network system 1 is short-circuited fault,, cause idle ring control failure because the rapid drawdown of line voltage causes the voltage control loop of Three-phase PWM Voltage Rectifier 3 can't keep the stable of its dc voltage.Should control two-way DC/DC converter 4 and run on pressure-increasning state this moment, by the constant of high-pressure side output voltage kept in the closed-loop control of high side voltage, also promptly guaranteed the constant of Three-phase PWM Voltage Rectifier 3 dc voltages.Control Three-phase PWM Voltage Rectifier 3 and run on inverter mode this moment, the same employing with the dq decoupling zero control under the leg speed rotation.Wherein, the desired value of electric current q axle component (real component) is made as 0, the desired value of electric current d axle component (idle component) descends according to line voltage the conditions of demand of reactive power is set, after the desired value that configures electric current d, q component, adopt the controlled signal of classical decoupling zero control algolithm of Three-phase PWM Voltage Rectifier 3, just can realize the output of a large amount of reactive powers with three brachium pontis switching tubes of this control signal driving Three-phase PWM Voltage Rectifier 3, play the effect of supporting line voltage, improved quality of voltage.The control block diagram of the Three-phase PWM Voltage Rectifier 3 of this moment as shown in Figure 3
In the utility model, two-way DC/DC converter 4 has played ultracapacitor 5 charge controllers respectively and has kept the stable effect of Three-phase PWM Voltage Rectifier 3 dc voltages when network system 1 normal operation and short trouble.These two kinds of operating states, need converter can carry out the two-way flow control of energy, the utility model in two-way DC/DC converter 4 adopt the two-way DC/DC transformer configuration of BUCK-BOOST types, as shown in Figure 4: two-way DC/DC converter 4 is by energy storage inductor L1, power switch pipe G1, G2, and sustained diode 1, D2 and output filter capacitor C1 form.The low-pressure side power positive end is received the leakage level of power switch pipe G1, the source class of power switch pipe G2 through energy storage inductor L1, the source electrode of power switch pipe G1 inserts the negative level of converter, the drain electrode of power switch pipe G2 inserts the anode of high-pressure side power supply, filter capacitor C1 is parallel to the two ends, high-pressure side, and sustained diode 1, D2 are connected in anti-parallel to the leakage of power switch pipe G1, G2--between the source class.Control by the break-make of carrying out power switch pipe G1, G2, can realize energy by low-pressure side to the high-pressure side or by the two-way flow of high-pressure side to low-pressure side, now the mode of operation of this converter is carried out following analysis (supposing that high-pressure side and low-pressure side all are connected to energy source):
(1) mode 1, power switch pipe G1 conducting, and power switch pipe G2 turn-offs, and to energy storage inductor L1 charging, inductive current increases the low-pressure side power supply by G1.
(2) mode 2, and power switch pipe G1 turn-offs, power switch pipe G2 conducting, and this moment, gradually reduced on high-tension side electric current from low-pressure side this moment because inductance L 1 electric current can not suddenly change, and electric current still passes through sustained diode 2 afterflows from the low-pressure side to the high-pressure side.
(3) mode 3, remain power switch pipe G1 and turn-off this moment, and power switch pipe G2 conducting is after being reduced to zero gradually from low-pressure side in the inductance on high-tension side electric current, through power switch G2 inductance L 1 is carried out reverse charging by the high-pressure side power supply, the reverse current of the inductance L 1 of flowing through this moment increases gradually.
(4) mode 4, power switch pipe G1 conducting, power switch pipe G2 turn-offs, can not suddenly change owing to inductance L 1 electric current this moment, reverse current in the inductance L 1 is along sustained diode 1 reverse afterflow, and the reverse current in the inductance L 1 reduces gradually at this moment, when the reverse current in the inductance L 1 reduces to 0, enter mode 1 again, thereby begin Control Circulation next time.
As seen from the above analysis, in a cycle period, by to power switch pipe G1, G2 carries out break-make control, can realize the two-way flow of energy between low-pressure side and high-pressure side, when flowing on high-tension side energy when flowing to the energy of low-pressure side by the high-pressure side by low-pressure side in the one-period, converter runs on the boost chopper state, otherwise converter runs on the buck chopper state.The size of both direction energy of flow depends on power switch pipe G1, the make-and-break time of G2, and the size of low-pressure side power supply and high-pressure side power supply energy in each cycle.By converter is added closed-loop control, flow direction that not only can control energy, can also accurately control the size of low-pressure side voltage, electric current and high side voltage, electric current, this has established technical foundation for the use of this converter in the utility model.
The structure of Three-phase PWM Voltage Rectifier 3 is (as shown in Figure 5): the drain electrode of power switch pipe G3, G4, G5 connects together the positive pole of receiving dc bus capacitor C2, the source electrode of power switch pipe G3, G4, G5 is connected with the drain electrode of power switch pipe G6, G7, G8 respectively, and the source electrode of power switch pipe G6, G7, G8 connects together the negative pole of receiving dc bus capacitor C2.Sustained diode 3, D4, D5, D6, D7, D8 distinguish the leakage of inverse parallel at each power switch pipe--between the source electrode.L2, L3, L4 are the AC side filter inductance, and filtering output back is inserted in the three-phase alternating current electrical network system 1.By above each switching tube being carried out the accurate control that break-make control can realize the flexible conversion of this converter rectification state, inverter mode and dc voltage, AC side reactive power.
Characteristics such as the power switch pipe of above-mentioned two-way DC/DC converter 4, Three-phase PWM Voltage Rectifier 3 can be selected insulated gate bipolar transistor (IGBT) for use, and it is a kind of turn-off device, and it is fast to have switching response speed, and conduction voltage drop is low.Can adopt the IPM power model in actual use; IPM inside also has driving, logic, control, detection and protective circuit on the basis of integrated IGBT and inverse parallel diode thereof; not only reduced the volume of device; shortened the development time; also strengthen the reliability of device, adapted to the developing direction of current power device.
Claims (3)
1. quality of power supply adjusting device based on ultracapacitor energy storage, it is characterized in that: this device comprises ultracapacitor (5), two-way DC/DC converter (4), Three-phase PWM Voltage Rectifier (3); Wherein, ultracapacitor (5) is connected to the low-pressure side of two-way DC/DC converter (4), the DC side of Three-phase PWM Voltage Rectifier (3) is inserted in the high-pressure side of two-way DC/DC converter (4), the parallel network system (1) that inserts of the AC side of Three-phase PWM Voltage Rectifier (3).
2. a kind of quality of power supply adjusting device according to claim 1 based on ultracapacitor energy storage, it is characterized in that: Three-phase PWM Voltage Rectifier (3) is formed structure and is: power switch pipe G3, G4, the drain electrode of G5 connects together the positive pole of receiving dc bus capacitor C2, power switch pipe G3, G4, the source electrode of G5 respectively with power switch pipe G6, G7, the drain electrode of G8 is connected, power switch pipe G6, G7, the source electrode of G8 connects together the negative pole of receiving dc bus capacitor C2, sustained diode 3, D4, D5, D6, D7, the inverse parallel of D8 difference is in the leakage of each power switch pipe--between the source electrode.
3. a kind of quality of power supply adjusting device according to claim 1 based on ultracapacitor energy storage, it is characterized in that: two-way DC/DC converter (4) is by energy storage inductor L1, power switch pipe G1, G2, sustained diode 1, D2 and output filter capacitor C1 form, the positive level of low-pressure side power supply is received the leakage level of power switch pipe G1 through energy storage inductor L1, the source class of power switch pipe G2, the source electrode of power switch pipe G1 inserts the negative level of converter, the drain electrode of power switch pipe G2 inserts the positive level of high-pressure side power supply, filter capacitor C1 is parallel to the two ends, high-pressure side, sustained diode 1, D2 is connected in anti-parallel to power switch pipe G1, the leakage of G2--between the source class.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010202849778U CN201742107U (en) | 2010-08-03 | 2010-08-03 | Power quality regulating device based on stored energy of super capacitor |
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| CN2010202849778U CN201742107U (en) | 2010-08-03 | 2010-08-03 | Power quality regulating device based on stored energy of super capacitor |
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| CN102570499A (en) * | 2011-12-23 | 2012-07-11 | 中电普瑞科技有限公司 | Constant-speed constant-frequency wind turbine low-voltage riding-through device and control method |
| CN102916593A (en) * | 2011-08-05 | 2013-02-06 | 英飞凌科技股份有限公司 | Power converter circuit |
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| CN103607117A (en) * | 2013-11-21 | 2014-02-26 | 无锡中星微电子有限公司 | DC-DC converter |
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| CN105470967A (en) * | 2016-01-11 | 2016-04-06 | 陕西科技大学 | Supercapacitor bank based low-voltage ride through apparatus |
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| CN111561416A (en) * | 2020-04-29 | 2020-08-21 | 国网山东省电力公司电力科学研究院 | Power grid-friendly wave energy power generation collecting system and operation control method thereof |
| CN113328445A (en) * | 2021-06-18 | 2021-08-31 | 哈尔滨工业大学 | Full-power compensation device for restraining nonlinear load from influencing performance of ship generator |
| CN114336641A (en) * | 2022-03-17 | 2022-04-12 | 西南交通大学 | Three-phase power supply ride-through power utilization system and control method |
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| CN102916593A (en) * | 2011-08-05 | 2013-02-06 | 英飞凌科技股份有限公司 | Power converter circuit |
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| CN110797910B (en) * | 2019-10-28 | 2023-06-02 | 天津大学 | Control method for improving low voltage ride through capability of matrix converter system |
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