CN203423492U - Electric energy quality series compensation control system based on solar photovoltaic power generation - Google Patents
Electric energy quality series compensation control system based on solar photovoltaic power generation Download PDFInfo
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- CN203423492U CN203423492U CN201320564816.8U CN201320564816U CN203423492U CN 203423492 U CN203423492 U CN 203423492U CN 201320564816 U CN201320564816 U CN 201320564816U CN 203423492 U CN203423492 U CN 203423492U
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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Abstract
The utility model discloses an electric energy quality series compensation control system based on solar photovoltaic power generation. The system comprises a solar photovoltaic panel, a direct-current booster unit, an H-bridge inverter unit, a gird-connected inverter, a transformer, a direct-current current detection device, a direct-current voltage detection device, an alternating-current voltage detection device, and a controller, wherein the controller is connected with the direct-current current detection device, the direct-current voltage detection device and the direct current booster unit respectively, and the direct-current current value and the direct-current voltage value are received so as to carry out maximum power tracking control on the direct-current booster unit; and the controller is connected with the alternating-current voltage detection device, the H-bridge inverter unit, and the gird-connected inverter, the working state of the grid is judged according to the received alternating-current voltage value, and the H-bridge inverter unit is controlled to output the alternating-current voltage for series compensation on the grid voltage when the grid voltage is reduced.
Description
Technical field
The utility model relates to a kind of electric device, relates in particular to a kind of electric compensation device.
Background technology
Universal along with the growing and high technology equipment of economy, various countries are more and more higher to the requirement of quality of power supply level, especially the extensive use of computer, modern control theory, Technology of Precision Measurement, the minor variations of some electric loads all can exert an influence to these responsive power consumption equipments, yet entire society aggravates electrified equipment degree of dependence, a large amount of use of the nonlinear-load such as modern power electronics devices but constantly worsened power utilization environment in addition.Power quality problem not only can bring very large economic loss to industry manufacture field, also will affect resident's daily life, even goes back entail dangers to life or causes the generation of security incident.For example, because voltage instability causes stopping work, restarting on the one hand after shut-down can damage the equipment of being quick on the draw, scrap semi-finished product, reduce product quality and greatly increase production cost, the favorable image of Hai Huigei company brings adverse effect on the other hand, even can destroy user's good commercial relations; Again for example, the voltage drop in medical operating or load are unstable also can bring impact in various degree to the use of the electricity consumption Medical Devices such as shadowless lamp or apparatus, causes the generation of serious malpractice.
According to EPRI-Electric Power Research Institute (Electric Power Research Institute, EPRI), studies show that: in the U.S., every year because power quality problem causes in industrial circle the loss on material and productivity up to 30,000,000,000 dollars; ， Singapore in addition, each voltage instantaneous declines all can cause the economic loss that surpasses 1,000,000 Singapore dollars.Along with developing rapidly of China's high-technology industry, the requirement of quality of power supply level is also improved gradually, wherein, it is the subject matter that affects quality of power supply level that voltage falls (subside, rapid drawdown).Although the time that voltage is subside is shorter, but its direct result is but interruption or the shut-down that can cause industrial processes, interrupt or the downtime is far longer than itself that voltage is subside accident time, therefore the economic loss causing is very large, meanwhile, voltage is subside the also operation work of entail dangers to power consumption equipment, causes the generation of the security incidents such as electric power system fault or subcircuits short circuit.The feature that voltage is subside be supply voltage suddenly drop to normal voltage value 10% to 90%, and continue 0.5 to 50 cycle.
Because voltage regulator can not solve this problem of voltage collapse, at present, the modal method that adopts is to adopt uninterrupted power supply(ups) (Uninterruptible Power System, UPS), but, its purchase cost and operating cost are all very expensive, and only can ensure the quality of power supply of individual equipment.In addition,, compared to uninterrupted power supply(ups), dynamic voltage compensator can effectively solve the problem that voltage subsides and reduce production run cost; Yet dynamic voltage compensator needs extra energy storage device also restricting its popularization and development in actual production.
Utility model content
The purpose of this utility model is to provide a kind of quality of power supply series compensation control system based on solar energy power generating, it can make full use of solar energy and compensate because voltage falls the pressure drop of grid causing, and for example, without extra energy storage device (battery is set, electric capacity etc.), voltage compensation fast response time, network load terminal voltage after compensation is stable, ensured the safe operation of all electricity consumption facilities on electrical network, avoided the generation of peril, simultaneously, it can also guarantee that the DC boosting unit of controlling by maximal power tracing provides electric energy to compensate to fault electrical network.
To achieve these goals, the utility model provides a kind of quality of power supply series compensation control system based on solar energy power generating, and it comprises:
Solar photovoltaic cell panel;
DC boosting unit, its direct-flow input end is connected with the output of solar photovoltaic cell panel;
H bridge inversion unit, its DC bus is connected with the output of DC boosting unit;
Combining inverter, its DC bus is connected with the DC bus of H bridge inversion unit, and its output is in order to be connected with electrical network;
Direct current detection device, it is connected with the DC output end of DC boosting unit, to detect the electric current of DC boosting unit output;
DC voltage detecting device, it is connected with the DC output end of DC boosting unit, to detect the voltage of DC boosting unit output;
Alternating voltage checkout gear, it is in order to be connected with electrical network, with the voltage of detection of grid;
Controller, it is connected with direct current detection device, DC voltage detecting device and DC boosting unit respectively, receive DC current values and the DC voltage value of direct current detection device and DC voltage detecting device transmission, so that DC boosting unit is carried out to maximal power tracing control; Described controller is also connected with combining inverter with alternating voltage checkout gear, H bridge inversion unit, described controller receives the operating state of the ac voltage judgement electrical network of alternating voltage checkout gear transmission, to control H bridge inversion unit output AC voltage when the electrical network generation pressure drop, line voltage is carried out to series compensation.
In use, quality of power supply series compensation control system based on solar energy power generating described in the utility model can utilize solar energy to compensate pressure drop of grid, and do not need to arrange extra energy-storage travelling wave tube, its solar energy that solar photovoltaic cell panel is collected is converted into direct current and exports DC boosting unit to and further form more galvanic current output, respectively with direct current detection device, direct current numerical value and direct voltage numerical value that the controller that DC voltage detecting device is connected with DC boosting unit records according to direct current detection device and DC voltage detecting device carry out maximal power tracing to DC boosting unit, so that the galvanic active power of DC boosting unit output is tending towards maximum, again due to controller also with alternating voltage checkout gear, H bridge inversion unit is connected with combining inverter, therefore controller can judge whether electrical network pressure drop has occurred according to the alternating current voltage value that comes from the transmission of alternating voltage checkout gear: when line voltage breaks down, the grid alternating current magnitude of voltage recording is U
s, do not reach standard voltage value U
0, therefore there is pressure drop, now, controller is controlled H bridge inversion unit to electrical network injecting compensating voltage U
i, bucking voltage U
ineed satisfy condition as U
i=U
0-U
s, remaining electric energy that solar photovoltaic cell panel transforms is controlled combining inverter by controller and is injected electrical network, when pressure drop does not occur electrical network, controller control H bridge inversion unit is zero to the voltage of electrical network output, and electric energy solar photovoltaic cell panel being transformed with Time Controller injects electrical network by combining inverter.
Active power by the output of above-mentioned DC boosting unit is P
w=U
w* I
w, wherein, galvanic voltage U
wby DC voltage detecting device, recorded, and galvanic electric current I
wby direct current detection device, recorded.Active-power P when this DC boosting unit output of judgement
wibe greater than the active-power P of output last time
wi-1, increase the duty ratio of DC boosting unit, if be not more than the active-power P of output last time
wi-1, the duty ratio that maintains DC boosting unit is constant, makes so all the time above-mentioned quality of power supply series compensation control system to the voltage drop of fault electrical network, compensate under the most effective operating state.
Further, the described quality of power supply series compensation control system based on solar energy power generating also comprises transformer, the two ends of the primary coil of described transformer are connected with the ac output end of H bridge inversion unit, and the secondary coil of described transformer is used for being serially connected in electrical network.
In one embodiment, in the quality of power supply series compensation control system based on solar energy power generating described in the utility model, described controller comprises digital signal processor.
In another embodiment, in the quality of power supply series compensation control system based on solar energy power generating described in the utility model, described controller comprises single-chip microcomputer.
In another embodiment, in the quality of power supply series compensation control system based on solar energy power generating described in the utility model, described controller comprises computer.
Further, the direct current detection device in the quality of power supply series compensation control system based on solar energy power generating described in the utility model comprises DC current sensor.
Further, the DC voltage detecting device in the quality of power supply series compensation control system based on solar energy power generating described in the utility model comprises direct current voltage sensor.
Further, the alternating voltage checkout gear in the quality of power supply series compensation control system based on solar energy power generating described in the utility model comprises AC voltage transformer.
A kind of quality of power supply series compensation control system based on solar energy power generating described in the utility model, its advantage possessing is:
1) make full use of solar energy, not arranging under the prerequisite of the energy storage devices such as battery, electric capacity, can effectively to fault electrical network, carry out voltage-drop compensation;
2) the DC boosting unit output direct current of controlling by maximal power tracing, thus the stable and safety that on electrical network circuit, power consumption equipment moves ensured;
3) effectively utilize the environmental protection energy, reduced production cost, alleviated disposal of pollutants;
4) simple in structure, cost, voltage compensation response speed is rapid.
Accompanying drawing explanation
Fig. 1 is the structural representation of the quality of power supply series compensation control system based on solar energy power generating described in the utility model under a kind of execution mode.
Embodiment
Below in conjunction with Figure of description and specific embodiment, the quality of power supply series compensation controlling party system based on solar energy power generating described in the utility model is made further explanation and description.
Fig. 1 is the structured flowchart of the quality of power supply series compensation control system based on solar energy power generating described in the utility model under a certain execution mode.
As shown in Figure 1, in the present embodiment, quality of power supply series compensation control system based on solar energy power generating comprises: controller 1, DC boosting unit 2, H bridge inversion unit 3, combining inverter 10, transformer 4, DC voltage detecting device 5, direct current detection device 6, alternating voltage checkout gear 7 and solar photovoltaic cell panel 8.The direct-flow input end of DC boosting unit 2 is connected with the output of solar photovoltaic cell panel 8; The DC bus of H bridge inversion unit 3 is connected with the output of DC boosting unit 2; The two ends of the primary coil of transformer 4 are connected with the ac output end of H bridge inversion unit 3, and the secondary coil of transformer is used for being serially connected in electrical network 9; The DC bus of combining inverter 10 is connected with the DC bus of H bridge inversion unit 3, and the output of combining inverter 10 is connected with electrical network 9; Direct current detection device 5 is connected with the DC output end of DC boosting unit 2, in order to detect the electric current of DC boosting unit output; DC voltage detecting device 6 is connected with the DC output end of DC boosting unit 2, in order to detect the voltage of DC boosting unit output; Alternating voltage checkout gear 7 is connected with electrical network 9, in order to the voltage of detection of grid; Controller 1 is connected with DC boosting unit 2, direct current detection device 5 and DC voltage detecting device 6 respectively, receives the DC current values I that comes from the transmission of direct current detection device
wand the DC voltage value U that comes from DC voltage detecting device transmission
w, so that DC boosting unit is carried out to maximum power P
wfollow the tracks of; Meanwhile, controller 1 is also connected with combining inverter 10 with alternating voltage checkout gear 7, H bridge inversion unit 3, the ac voltage U that controller 1 reception is transmitted from alternating voltage checkout gear 7 is to judge whether whether the operating state of electrical network normally (pressure drop has occurred), if the line voltage value recording is normal voltage U
0, illustrating that line voltage is normal, the alternating voltage that this Time Controller 1 is controlled 3 outputs of H bridge inversion unit is zero, making the alternating voltage of transformer 4 input electrical networks is zero, with Time Controller 1, controls the electric energy injection electrical network that combining inverter 10 transforms solar energy; If the line voltage value U recording
sbe less than normal voltage U
0, illustrating that fault has occurred electrical network, this Time Controller 1 is controlled H bridge inversion unit 3 output AC voltage U
iline voltage is compensated to bucking voltage U
ineed to satisfy condition as U
i=U
0-U
s, the dump energy that solar energy transforms is controlled combining inverter 10 by controller 1 and is injected electrical network.When the electric energy of solar energy conversion is not enough to pressure drop of grid to compensate, combining inverter can be stable to maintain DC bus-bar voltage from electrical network power taking.
In the above-described embodiments, controller 1 can be computer, any one in single-chip microcomputer or digital signal processor.
In addition, in order accurately to measure the numerical value of direct current and direct voltage, direct current detection device adopts DC current sensor, and DC voltage detecting device also adopts direct current voltage sensor.Meanwhile, in order accurately to measure the numerical value of grid ac voltage, alternating voltage checkout gear has adopted AC voltage transformer.
When line voltage is subside because of fault; the quality of power supply series compensation control system based on solar energy power generating that the technical program relates to can compensate rapidly pressure drop of grid effectively; make amplitude and the phase angle of network load voltage not produce any variation, thereby protected load voltage not to be subject to the impact of electric network fault.
Be noted that above enumerate only for specific embodiment of the utility model, obviously the utility model is not limited to above embodiment, has many similar variations thereupon.If all distortion that those skilled in the art directly derives or associates from the disclosed content of the utility model, all should belong to protection range of the present utility model.
Claims (8)
1. the quality of power supply series compensation control system based on solar energy power generating, is characterized in that, comprising:
Solar photovoltaic cell panel;
DC boosting unit, its direct-flow input end is connected with the output of solar photovoltaic cell panel;
H bridge inversion unit, its DC bus is connected with the output of DC boosting unit;
Combining inverter, its DC bus is connected with the DC bus of H bridge inversion unit, and its output is in order to be connected with electrical network;
Direct current detection device, it is connected with the DC output end of DC boosting unit, to detect the electric current of DC boosting unit output;
DC voltage detecting device, it is connected with the DC output end of DC boosting unit, to detect the voltage of DC boosting unit output;
Alternating voltage checkout gear, it is in order to be connected with electrical network, with the voltage of detection of grid;
Controller, it is connected with direct current detection device, DC voltage detecting device and DC boosting unit respectively, receive DC current values and the DC voltage value of direct current detection device and DC voltage detecting device transmission, so that DC boosting unit is carried out to maximal power tracing control; Described controller is also connected with combining inverter with alternating voltage checkout gear, H bridge inversion unit, described controller receives the operating state of the ac voltage judgement electrical network of alternating voltage checkout gear transmission, to control H bridge inversion unit output AC voltage when the electrical network generation pressure drop, line voltage is carried out to series compensation.
2. the quality of power supply series compensation control system based on solar energy power generating as claimed in claim 1, it is characterized in that, also comprise transformer, the two ends of the primary coil of described transformer are connected with the ac output end of H bridge inversion unit, and the secondary coil of described transformer is used for being serially connected in electrical network.
3. the quality of power supply series compensation control system based on solar energy power generating as claimed in claim 1, is characterized in that, described controller comprises digital signal processor.
4. the quality of power supply series compensation control system based on solar energy power generating as claimed in claim 1, is characterized in that, described controller comprises single-chip microcomputer.
5. the quality of power supply series compensation control system based on solar energy power generating as claimed in claim 1, is characterized in that, described controller comprises computer.
6. the quality of power supply series compensation control system based on solar energy power generating as claimed in claim 1, is characterized in that, described direct current detection device comprises DC current sensor.
7. the quality of power supply series compensation control system based on solar energy power generating as claimed in claim 1, is characterized in that, described DC voltage detecting device comprises direct current voltage sensor.
8. the quality of power supply series compensation control system based on solar energy power generating as claimed in claim 1, is characterized in that, described alternating voltage checkout gear comprises AC voltage transformer.
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| CN201320564816.8U CN203423492U (en) | 2013-09-11 | 2013-09-11 | Electric energy quality series compensation control system based on solar photovoltaic power generation |
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| CN201320564816.8U CN203423492U (en) | 2013-09-11 | 2013-09-11 | Electric energy quality series compensation control system based on solar photovoltaic power generation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103475024A (en) * | 2013-09-11 | 2013-12-25 | 国网山东省电力公司聊城供电公司 | Electric energy quality serial connection compensation control method and system based on solar photovoltaic power generation |
| CN103812117A (en) * | 2014-02-26 | 2014-05-21 | 上海交通大学 | Feed-forward voltage compensation device based on solar photovoltaic power generation |
| CN103812116A (en) * | 2014-02-26 | 2014-05-21 | 上海交通大学 | Feed-forward voltage series compensation device based on solar photovoltaic power generation |
-
2013
- 2013-09-11 CN CN201320564816.8U patent/CN203423492U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103475024A (en) * | 2013-09-11 | 2013-12-25 | 国网山东省电力公司聊城供电公司 | Electric energy quality serial connection compensation control method and system based on solar photovoltaic power generation |
| CN103812117A (en) * | 2014-02-26 | 2014-05-21 | 上海交通大学 | Feed-forward voltage compensation device based on solar photovoltaic power generation |
| CN103812116A (en) * | 2014-02-26 | 2014-05-21 | 上海交通大学 | Feed-forward voltage series compensation device based on solar photovoltaic power generation |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140205 Termination date: 20140911 |
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| EXPY | Termination of patent right or utility model |