CN103515966A - Base building type control system and method of direct voltage - Google Patents
Base building type control system and method of direct voltage Download PDFInfo
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- CN103515966A CN103515966A CN201310367423.2A CN201310367423A CN103515966A CN 103515966 A CN103515966 A CN 103515966A CN 201310367423 A CN201310367423 A CN 201310367423A CN 103515966 A CN103515966 A CN 103515966A
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention discloses a base building type control system and method of direct voltage. The base building type control system of the direct voltage comprises a plurality of power units which are connected in series in sequence, a feedback module, a comparison module, a PWM output control module and a reference unit, wherein the reference unit is used for providing direct voltage detection and sampling control for the power units, the input end of the reference unit is connected with an external power source through a rectifying device, the reference unit is connected with the last power unit in series, the first power unit is connected with an internal power source, the power units are connected with the comparison module through the feedback module, the output end of the reference unit is connected with the comparison module, and the comparison module is connected with the power units through the PWM output control module. The base building type control system and method of the direct voltage can prevent sharp fluctuation of the direct voltage of each power unit of an SVG, and avoid the problem that jumping happens due to oscillation, caused by overlarge direct voltage, of system adjustment and exceeding direct voltage caused by overlarge direct voltage, and operation of the SVG device can be safer and more reliable.
Description
Technical field
The present invention relates to power domain, relate in particular to a kind of base formula DC voltage control system and method for building.
Background technology
Middle pressure silent oscillation dynamic synchronization compensation arrangement, be called for short SVG, with its fast response signal change, can absorb and send that reactive power is carried out bidirectional modulation, floor space is little and regulating characteristics is not subject to many advantages such as impact of line voltage, in the power quality controlling technology of 21 century, become unarguable core product, and obtained significant progress, and becoming power electronic technology in the important development direction of field of power, this technology also has great utilization prospect in fields such as iron and steel, coloured, mine, electric railway, wind-powered electricity generations.At present, the basic principle that this product and technology realize is to press under prerequisite at galvanic current, controls that SVG device sends or the size of the reactive power that absorbs by indirect control method, to realize the object of automatic control reactive power.Therefore, can the stable of direct voltage wherein realize one of key influence factor of controlling target by being.At present on the market, the DC voltage stability control method for the SVG of chain structure mainly contains two kinds.
The first is energy pressure release method: the direct voltage detecting on a certain power cell in monitoring system surpasses after set point, trigger immediately the discharge loop on the electrochemical capacitor that is connected in parallel on power cell, the energy of electrochemical capacitor is released, make the voltage drop at electrochemical capacitor two ends below set point, and then stop setting out, discharge loop is quit work, with this, realize the control to line direct voltage.The problem that this control method exists: 1) each unit is a dynamic fluctuation value to the sampled value of direct voltage, can be along with the adjusting of load is fluctuateed, the so value of gained and adjusting between target control value, not to carry out feedback regulation according to the integral body of a system, but rely on discharge loop to release progressively near desired value to energy.Just different because of load of different nature to the time constant of discharge loop like this, select the discharge time constant of same to adapt to each type load, must cause control lag, direct voltage fluctuation, declines and make to control effect.2) be direct voltage during lower than lower limit discharge loop cannot solve control problem, the control effect of device is declined.
The second is direct voltage feedback control method: by monitoring system detect the upper limit that the direct voltage of a certain power cell surpass to set or lower than set lower limit time, calculate after plus or minus error amount, send in corresponding feedback element, after the modulation ratio of this unit controls is finely tuned, adjust this unit energy output relation and progressively stable DC voltage fluctuation scope in.The subject matter that this feedback exists: the amplitude range 1) regulating is little, the modification stability of the DC voltage fluctuation that the load of larger fluctuation scope is caused is limited in one's ability, and still can not make DC voltage stability may cause direct current overvoltage and chaser in range of set value when serious.2) fluctuation range of the direct voltage detecting fluctuates with system voltage and load fluctuation always, making DC parameter magnitude of voltage is also relatively at fluctuation status, the direct voltage parameter value of neither one benchmark carries out corresponding control, thereby cause the direct voltage of controlling still may raise and can not stablize and overvoltage chaser, affected the stability of system operation.
Comprehensive above-mentioned description, is badly in need of on the market a kind of novel DC voltage control method and solves above-mentioned problem.
Summary of the invention
For the weak point existing in above-mentioned technology, the invention provides a kind of base formula DC voltage control system and method for building, this system can prevent the direct voltage fluctuation of each power cell of SVG, avoid the too high system causing of direct voltage to regulate concussion or direct voltage to exceed standard and the phenomenon of chaser, make the operation of SVG device more safe and reliable.
For achieving the above object, the invention provides a kind of base formula DC voltage control system of building, comprise power cell, feedback module, comparison module, the PWM output control module of a plurality of series connection successively and be used to a plurality of power cells to provide direct voltage to detect and controlling of sampling reference cell; The input of described reference cell connects external power source by rectifying device, described reference cell and last power unit cascade, first power cell connects internal electric source, described a plurality of power cell connects comparison module by feedback module respectively, the output of described reference cell connects comparison module, and described comparison module connects respectively a plurality of power cells by PWM output control module.
Wherein, the positive pole of the inner electrochemical capacitor of described reference cell is all connected with the output of rectifying device by power cable with negative pole, and the input of described rectifying device connects external power source.
Wherein, the class of insulation of described power cable is 10KV.
Wherein, described rectifying device is rectifier or voltage-stabiliser tube.
For achieving the above object, the present invention also provides a kind of base formula DC voltage control method of building, and comprises the following steps:
Steps A: reference cell sampling direct voltage, and as the reference direct voltage of each power cell and deliver to comparison module;
Step B: feedback module gathers the operation DC voltage of a plurality of power cells, and deliver to comparison module;
Step C: the operation DC voltage of each power cell with reference to direct voltage, on comparison module, compare, and obtain the error amount of each power cell operation DC voltage;
Step D: each error amount on comparison module is delivered to PWM output control module, and carried out the modulation ratio of regulation output signal by PWM output control module;
Step e: PWM output control module outputs to each power cell by modulation ratio, and control the variation of exporting energy, the direct voltage of each power cell is trended towards with reference to DC voltage value.
Compared with prior art, base formula DC voltage control system and the method for building provided by the invention, has following beneficial effect:
1) in the present invention, a plurality of power cells are connected successively, reference cell and last power unit cascade, formed and built base formula control structure, and reference cell is used to a plurality of power cells to provide direct voltage to detect and controlling of sampling, without DC voltage control device is set in addition, simple in structure, successful not only, and also volume reduces greatly.
2) pass through using last power cell in original structure as reference cell, with external power source, it is charged, make it be charged to the reference direct voltage of design, making its sampled value is a quiescent value, effectively prevent fluctuating widely of direct voltage in each power cell, effectively having avoided sampled value in existing control method is a dynamic fluctuation value, along with the adjusting of load is fluctuateed, causes control lag, direct voltage fluctuation and make to control the problem that effect declines.
3) in the present invention, be by comparing on comparison module with reference to direct voltage and each power cell operation DC voltage, each error amount on comparison module being delivered to PWM output control module, and by PWM output control module, carried out the modulation ratio of regulation output signal; Finally make the direct voltage in a plurality of power cells trend towards with reference to direct voltage.This control procedure can guarantee that each power cell has a stable operating voltage, effectively avoided available technology adopting Voltage Feedback to control method, because the amplitude range fluctuation range little and direct voltage of its adjusting is the problem of the system that the causes overvoltage chaser that fluctuates with system voltage and load fluctuation always.
4) this system and method can prevent the fluctuation of each power unit direct voltage of SVG, avoids the too high system causing of direct voltage to regulate concussion, direct voltage to exceed standard and the problem of chaser, makes the operation of SVG device more safe and reliable.
Accompanying drawing explanation
Fig. 1 is the block diagram of building base formula DC voltage control system of the present invention;
Fig. 2 is flow chart of steps of building base formula DC voltage control method of the present invention.
Main element symbol description is as follows:
10, power cell 11, feedback module
12, comparison module 13, PWM output control module
14, reference cell 15, rectifying device
16, internal electric source 17, external power source
Embodiment
In order more clearly to explain the present invention, below in conjunction with accompanying drawing, the present invention is further described.
Refer to Fig. 1, the base formula DC voltage control system of building of the present invention, comprises power cell 10, feedback module 11, comparison module 12, the PWM output control module 13 of a plurality of series connection successively and is used to a plurality of power cells 10 to provide direct voltage to detect and controlling of sampling reference cell 14; The input of reference cell 14 connects external power source 17 by rectifying device 15, reference cell 14 is connected with last power cell 10, first power cell 10 connects internal electric source 16, a plurality of power cells 10 connect comparison module 12 by feedback module 11 respectively, the output of reference cell 14 connects comparison module 12, and comparison module 12 connects respectively a plurality of power cells 10 by PWM output control module 13.
In the present embodiment, the positive pole of reference cell 14 inner electrochemical capacitors is all connected with the output of rectifying device 15 by power cable with negative pole, and the input of rectifying device 15 connects external power source.This reference cell 14 also comprises IGBT, stacked bus and two the output copper bars that four bridge-types distribute; The positive pole of stacked bus and one end of negative pole are connected respectively positive pole and the negative pole of electrolytic capacitor, and the anodal other end of stacked bus connects respectively the C utmost point of an IGBT and the 3rd IGBT, the other end of the negative pole of stacked bus connects respectively the E utmost point of the 2nd IGBT and the 4th IGBT, the first output copper bar is extremely connected and draws with the E utmost point and the C of an IGBT and the 2nd IGBT respectively, and the second output copper bar 2 is extremely connected and draws with the E utmost point and the C of the 3rd IGBT and the 4th IGBT respectively.
In the present embodiment, the class of insulation of power cable is 10KV, with the requirement that meets insulation against ground and charge to capacitor.Certainly, the present invention is not limited to the class of insulation of power cable, if the change to the class of insulation of power cable, as long as in 10KV left and right, so also can be understood as is to simple deformation of the present invention or conversion, all falls into protection scope of the present invention.
In the present embodiment, rectifying device 15 is rectifier or voltage-stabiliser tube, certainly; it can also be the rectifying device 15 of other types; if the change to rectifying device 15 types, so also can be understood as is to simple deformation of the present invention or conversion, all falls into protection scope of the present invention.
Please further consult Fig. 2, the base formula DC voltage control method of building of the present invention, under SVG and the grid-connected no-load condition of system, each power cell 10 direct voltage is controlled by the direct voltage of reference cell 14, and it comprises the following steps:
Step S1: reference cell sampling direct voltage, and as the reference direct voltage of each power cell and deliver to comparison module; Step S2: feedback module gathers the operation DC voltage of a plurality of power cells, and deliver to comparison module; Step S3: the operation DC voltage of each power cell with reference to direct voltage, on comparison module, compare, and obtain the error amount of each power cell operation DC voltage; Step S4: each error amount on comparison module is delivered to PWM output control module, and carried out the modulation ratio of regulation output signal by PWM output control module; Step S5:PWM output control module outputs to each power cell by modulation ratio, and controls the variation of output energy, and the direct voltage of each power cell is trended towards with reference to DC voltage value.
In the present invention, in system, reference cell 14 and power cell 10, similar with prime power unit from project organization, is equivalent to using last power cell in original chain type topological structure as this reference cell 14.In the present invention, reference cell 14 is to different in the acquisition of direct voltage with power cell 10 differences, the direct voltage of power cell 10 obtains and sets up, by controlling and modulation technique, in employing, get and can mode obtain the energy of storage and set up direct voltage from system, and the direct voltage of reference cell 14 is set up, be to charge by external common DC supply, its parameter value index that is charged to design is set up.
Base formula DC voltage control system and the method for building provided by the invention, has following advantage:
1) in the present invention, a plurality of power cells 10 are connected successively, reference cell 14 is connected with last power cell 10, formed and built base formula control structure, and reference cell 14 is used to a plurality of power cells 10 to provide direct voltage to detect and controlling of sampling, without DC voltage control device is set in addition, simple in structure, successful not only, and also volume reduces greatly.
2) pass through using last power cell in original structure as reference cell 14, and with external power source 17, it is charged, make it be charged to the reference direct voltage of design, making its sampled value is a quiescent value, effectively prevent fluctuating widely of direct voltage in each power cell 10, effectively having avoided sampled value in existing control method is a dynamic fluctuation value, along with the adjusting of load is fluctuateed, causes control lag, direct voltage fluctuation and make to control the problem that effect declines.
3) in the present invention, be by comparing on comparison module 12 with reference to direct voltage and each power cell 10 operation DC voltage, each error amount on comparison module 12 is delivered to PWM output control module 13, and by PWM output control module 13, carried out the modulation ratio of regulation output signal; Finally make the direct voltage in a plurality of power cells 10 trend towards with reference to direct voltage.This control procedure can guarantee that each power cell has a stable operating voltage, effectively avoided available technology adopting Voltage Feedback to control method, because the amplitude range fluctuation range little and direct voltage of its adjusting is the problem of the system that the causes overvoltage chaser that fluctuates with system voltage and load fluctuation always.
4) this system and method can prevent the fluctuation of each power unit direct voltage of SVG, avoids the too high system causing of direct voltage to regulate concussion, direct voltage to exceed standard and the problem of chaser, makes the operation of SVG device more safe and reliable.
Disclosed is above only several specific embodiment of the present invention, but the present invention is not limited thereto, and the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.
Claims (5)
1. build a base formula DC voltage control system, it is characterized in that, comprise power cell, feedback module, comparison module, the PWM output control module of a plurality of series connection successively and be used to a plurality of power cells to provide direct voltage to detect and controlling of sampling reference cell; The input of described reference cell connects external power source by rectifying device, described reference cell and last power unit cascade, first power cell connects internal electric source, described a plurality of power cell connects comparison module by feedback module respectively, the output of described reference cell connects comparison module, and described comparison module connects respectively a plurality of power cells by PWM output control module.
2. the base formula DC voltage control system of building according to claim 1, it is characterized in that, the positive pole of the inner electrochemical capacitor of described reference cell is all connected with the output of rectifying device by power cable with negative pole, and the input of described rectifying device connects external power source.
3. according to right, want the base formula of the building DC voltage control system described in 2, it is characterized in that, the class of insulation of described power cable is 10KV.
4. the base formula DC voltage control system of building according to claim 3, is characterized in that, described rectifying device is rectifier or voltage-stabiliser tube.
5. build a base formula DC voltage control method, it is characterized in that, comprise the following steps:
Steps A: reference cell sampling direct voltage, and as the reference direct voltage of each power cell and deliver to comparison module;
Step B: feedback module gathers the operation DC voltage of a plurality of power cells, and deliver to comparison module;
Step C: the operation DC voltage of each power cell with reference to direct voltage, on comparison module, compare, and obtain the error amount of each power cell operation DC voltage;
Step D: each error amount on comparison module is delivered to PWM output control module, and carried out the modulation ratio of regulation output signal by PWM output control module;
Step e: PWM output control module outputs to each power cell by modulation ratio, and control the variation of exporting energy, the direct voltage of each power cell is trended towards with reference to DC voltage value.
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| CN201310367423.2A CN103515966A (en) | 2013-08-21 | 2013-08-21 | Base building type control system and method of direct voltage |
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| CN201310367423.2A CN103515966A (en) | 2013-08-21 | 2013-08-21 | Base building type control system and method of direct voltage |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108103553A (en) * | 2017-12-28 | 2018-06-01 | 大博医疗科技股份有限公司 | A kind of colorful anode oxidation membrane preparation method of titanium surface non-impurity-doped low defect |
| CN110032232A (en) * | 2018-01-12 | 2019-07-19 | 中芯国际集成电路制造(北京)有限公司 | A kind of electric power controller and power supply device |
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| JP3007934B2 (en) * | 1996-07-16 | 2000-02-14 | ダイヤモンド電機株式会社 | Power factor improvement circuit |
| CN2427918Y (en) * | 2000-01-26 | 2001-04-25 | 北京理工大学 | Novel, quick action and pulsation charging device |
| JP2011211803A (en) * | 2010-03-29 | 2011-10-20 | Mitsubishi Electric Corp | Control device for power system stabilization device |
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Patent Citations (4)
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| JP3007934B2 (en) * | 1996-07-16 | 2000-02-14 | ダイヤモンド電機株式会社 | Power factor improvement circuit |
| CN2358475Y (en) * | 1998-12-02 | 2000-01-12 | 马廷和 | Power supply device for high power electron-tube heater |
| CN2427918Y (en) * | 2000-01-26 | 2001-04-25 | 北京理工大学 | Novel, quick action and pulsation charging device |
| JP2011211803A (en) * | 2010-03-29 | 2011-10-20 | Mitsubishi Electric Corp | Control device for power system stabilization device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108103553A (en) * | 2017-12-28 | 2018-06-01 | 大博医疗科技股份有限公司 | A kind of colorful anode oxidation membrane preparation method of titanium surface non-impurity-doped low defect |
| CN108103553B (en) * | 2017-12-28 | 2019-11-26 | 大博医疗科技股份有限公司 | A kind of colorful anode oxidation membrane preparation method of titanium surface non-impurity-doped low defect |
| CN110032232A (en) * | 2018-01-12 | 2019-07-19 | 中芯国际集成电路制造(北京)有限公司 | A kind of electric power controller and power supply device |
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Application publication date: 20140115 |