CN102255316A - In-phase static reactive power controller and control method thereof - Google Patents
In-phase static reactive power controller and control method thereof Download PDFInfo
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- CN102255316A CN102255316A CN2011101707514A CN201110170751A CN102255316A CN 102255316 A CN102255316 A CN 102255316A CN 2011101707514 A CN2011101707514 A CN 2011101707514A CN 201110170751 A CN201110170751 A CN 201110170751A CN 102255316 A CN102255316 A CN 102255316A
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- 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
Abstract
The invention relates to an in-phase static reactive power controller and a control method thereof. The in-phase static reactive power controller comprises a control protection module and three reactive compensation modules, wherein each reactive compensation module comprises an in-phase adjustable transformer with a secondary side consists of three windings, a power electronic bidirectional switching device, a reactor and a capacitor, the power electronic bidirectional switching device is connected with the control protection module, and the windings at the secondary side of the in-phase adjustable transformer are connected with the reactor and the capacitor through the power electronic bidirectional switching device sequentially. The method comprises the steps of: acquiring power grid voltage and current signals to obtain a reactive capacity, inquiring a switching state table, controlling forward direction switching, reverse direction switching or no switching of the windings at the secondary side of the in-phase adjustable transformer so as to change end voltages of the capacitor, and outputting the reactive capacity. The in-phase static reactive power controller has the characteristics of reactive continuous regulation, reliability in operation, small loss, high response speed, small occupation area, less investment and the like.
Description
Technical field
The invention belongs to electric and electronic technical field, particularly a kind of homophase static reacance power controller and control method thereof.
Background technology
Current, along with expanding economy, power consumer is more and more higher to the requirement of the quality of power supply.Voltage deviation is an importance of the quality of power supply.Cover the distribution network system wide, that quantity is big at present and exist radius of electricity supply big, present situations such as unreasonable structure cause the voltage deviation problem more outstanding.The conventional means of voltage adjustment is to adopt on-load tap-changing transformer and switch on-off capacitor group.But on-load tap-changing transformer and switch on-off capacitor group all exist can not with the load fluctuation and the shortcoming of frequent movement.Adopt vacuum type circuit breaker opening-closing capacitor bank simultaneously, there is the possibility of restriking in vacuum circuit-breaker when the excision capacitive load; When using vacuum circuit-breaker excision capacitor group, in a single day circuit breaker is restriked, will cause the damage of circuit breaker or capacitor group owing to overvoltage.In electrical network, once occurred repeatedly causing the serious accident of device damage because vacuum circuit-breaker is restriked.Prevent that the vacuum circuit-breaker equipment breakdown that causes of restriking has realistic meaning.
Because the quick growth of load, transformer heavy duty even overload phenomenon become increasingly conspicuous, because the quick variation of load, the busbar voltage fluctuation is frequent, in order to guarantee that voltage is stable and satisfy voltage curve and control requirement that opening-closing capacitor bank number of times and group number are all many, capacitor group ratio of defects is higher.
Existing Static Var Compensator can solve the voltage fluctuation problem fast, continually, take up an area of problem big, that investment is big but exist, can not particularly use in existing transformer station in city transformer station large-scale popularization, and there is the problem that idle adjusting smoothness is poor, investment is bigger in the another kind of thyristor switchable capacitor device that solves the voltage fluctuation problem fast, continually.
Therefore, along with the user is more and more higher to the requirement of rate of qualified voltage, the potentiality that further improve the rate of qualified voltage level by raising the management level under existing equipment are limited, need to adopt take up an area of little, small investment, the new technology that is easy to large-scale popularization, new equipment and improve the voltage operation level.
Summary of the invention
(1) technical problem
The technical problem to be solved in the present invention is: a kind of reliable, loss is little, occupation of land is little, small investment, the quick and smooth that is easy to promote are regulated dynamic reactive compensation device is provided.
(2) technical scheme
The invention discloses a kind of homophase static reacance power controller; this controller comprises a control protection module and 3 reactive compensation modules; this control protection module links to each other with these 3 reactive compensation modules respectively; wherein this reactive compensation module comprises the homophase adjustable transformer that a secondary is made of three windings; a power electronics bidirectional switch device; a reactor and a capacitor; this power electronics bidirectional switch device links to each other with this control protection module; this homophase adjustable transformer secondary winding links to each other with this reactor and this capacitor successively by this power electronics bidirectional switch device; the scope of the rated voltage ratio of three windings of this homophase adjustable transformer secondary is 1: 3: 4 to 1: 3: 9
This controls protection module, is used to gather line voltage and current signal, obtains the required idle amount of electrical network, and to this power electronics bidirectional switch device transmit button status signal,
This power electronics bidirectional switch device, be used for according to this switch state signal that receives, control three winding forward voltages of secondary input, the reverse voltage input of this homophase adjustable transformer or do not drop into, thereby change the terminal voltage of capacitor, export this idle amount.
Further; this power electronics bidirectional switch device is made of 3 thyristor unit; between two phase lines, each this thyristor unit links to each other with a winding and this control protection module of this homophase adjustable transformer secondary respectively in triple line for these 3 thyristor unit and this reactor and this capacitor series.
Further, this power electronics bidirectional switch device also comprises 3 by-pass switch devices, and each this thyristor unit is in parallel with this by-pass switch device, and this by-pass switch device is used for when this thyristor unit breaks down, this thyristor unit of bypass.
Further; what this thyristor unit comprised that circulation links to each other 4 aligns antiparallel thyristor; this 4 aligns the mode of antiparallel thyristor by bridge joint and links to each other with a winding of this homophase adjustable transformer secondary; and this 4 aligns between antiparallel thyristor and two phase lines of other 2 these thyristor unit, this reactor and this capacitors in series in triple line, and the trigger electrode of each this thyristor all links to each other with this control protection module.
Further, the rated voltage ratio between three windings of this homophase adjustable transformer secondary is 1: 3: 9.
The invention also discloses a kind of homophase static reacance Poewr control method, this method comprises the steps:
(3) beneficial effect
The present invention has and does not have impact, no arcing, no overvoltage, reliable, loss is little, response time is fast, take up an area of little, invest less relatively, can with characteristics such as dispatch automated system real-time communication, not only frequent adjustment is idle fast, and idle adjusting approached continuous variation, it is a kind of fine solution busbar voltage fluctuation, assurance voltage is stable, satisfy user's device that control requires to voltage curve, it has important meaning and practical value to improving the quality of power supply (voltage fluctuation), have direct economic benefit and social benefit widely, therefore, can be widely used in intelligent grid, be fit in building unified strong intelligent grid, apply in a large number.
Description of drawings
Fig. 1 is the structural representation according to homophase static reacance power controller of the present invention.
Fig. 2 is the circuit structure diagram of first power electronics bidirectional switch device of the present invention.
Fig. 3 is the circuit structure diagram of second power electronics bidirectional switch device of the present invention.
Fig. 4 is the circuit structure diagram of the 3rd power electronics bidirectional switch device of the present invention.
Fig. 5 is the flow chart of homophase static reacance Poewr control method of the present invention.
Embodiment
Homophase static reacance power controller of the present invention and control method thereof are described in detail as follows in conjunction with the accompanying drawings and embodiments.
With reference to Fig. 1; a kind of homophase static reacance power controller 101 disclosed by the invention comprises a control protection module 102 and 3 reactive compensation modules 103; 103 '; 103 "; control protection module 102 respectively with 3 reactive compensation modules 103; 103 '; 103 " link to each other; and reactive compensation module 103 also links to each other with the B phase line with the A phase line; reactive compensation module 103 ' also link to each other with the C phase line with the B phase line; reactive compensation module 103 " also link to each other with the C phase line; reactive compensation module 103 comprises a homophase adjustable transformer 104; a power electronics bidirectional switch device 107; reactor 108 and a capacitor 109; homophase adjustable transformer 104 former limits comprise a winding 106 with the A phase line; and its secondary is by three winding 105-1; 105-2 and 105-3 constitute; the former limit winding 106 of homophase adjustable transformer 104 links to each other with the B phase line with the A phase line; the secondary winding 105-1 of homophase adjustable transformer 104; 105-2 links to each other with power electronics bidirectional switch device 107 respectively with 105-3; power electronics bidirectional switch device 107 is connected the back cross-over connection between A phase line and B phase line with reactor 108 and capacitor 109; in like manner; a homophase adjustable transformer 104 of reactive compensation module 103 ' comprise '; power electronics bidirectional switch device 107 '; reactor 108 ' and capacitor 109 '; homophase adjustable transformer 104 ' former limit comprise a winding 106 '; and its secondary is by three winding 105 '-1; 105 '-2 and 105 '-3 constitute; homophase adjustable transformer 104 ' former limit winding 106 ' link to each other with the C phase line with the B phase line; homophase adjustable transformer 104 ' secondary winding 105 '-1; 105 '-2 and 105 '-3 respectively with power electronics bidirectional switch device 107 ' link to each other; power electronics bidirectional switch device 107 ' with the cross-over connection of reactor 108 ' and capacitor 109 ' after connecting between B phase line and C phase line; reactive compensation module 103 " comprises a homophase adjustable transformer 104 "; a power electronics bidirectional switch device 107 "; reactor 108 " and a capacitor 109 "; homophase adjustable transformer 104 " former limit comprises a winding 106 "; and its secondary is by three windings 105 " 1; 105 " 2 and 105 "-3 constitute; homophase adjustable transformer 104 " former limit winding 106 " links to each other with the C phase line with the A phase line; homophase adjustable transformer 104 " secondary winding 105 "-1; 105 " 2 and 105 "-3 " link to each other power electronics bidirectional switch device 107 " with reactor 108 " and capacitor 109 and " connect the back cross-over connection between A phase line and C phase line with power electronics bidirectional switch device 107 respectively.The scope of the rated voltage ratio of three windings of homophase adjustable transformer secondary is 1: 3: 4 to 1: 3: 9, and particularly three winding rated voltage ratios of secondary are that 1: 3: 9 o'clock beneficial effect is best.
Because power electronics bidirectional switch device 107,107 of the present invention ', 107 " structure complicated, so in this detailed description.As shown in Figure 2; first power electronics bidirectional switch device 107 is by 3 thyristor unit 201-1; 201-2 and 201-3 constitute; thyristor unit 201-1 4 aligns antiparallel thyristor T1-1 by what circulation linked to each other; T1-2; T1-3 and T1-4 and by-pass switch 202-1 form; thyristor unit 201-2 4 aligns antiparallel thyristor T2-1 by what circulation linked to each other; T2-2; T2-3 and T2-4 and by-pass switch 202-2 form; thyristor unit 201-3 4 aligns antiparallel thyristor T3-1 by what circulation linked to each other; T3-2; T3-3 and T3-4 and by-pass switch 202-3 form; three winding 105-1 of the secondary of homophase adjustable transformer 104; 105-2 and 105-3 by the bridge joint mode respectively with thyristor unit 201-1; 201-2 and 201-3 link to each other; thyristor unit 201-1; 201-2 and 201-3 also with reactor 108; 109 series connection back cross-over connections are between A phase line and B phase line; whenever align antiparallel thyristor T1-1; T1-2; T1-3; T1-4; T2-1; T2-2; T2-3; T2-4; T3-1; T 3-2; the trigger electrode of each thyristor among T 3-3 and the T 3-4 links to each other with control protection module 102 respectively; by-pass switch 202-1; 202-2 and 202-3 respectively with thyristor unit 201-1; 201-2 and 201-3 parallel connection; when being used for breaking down in the thyristor unit, the thyristor unit that bypass is coupled.Fig. 2, shown in Figure 3ly be respectively second, the 3rd power electronics bidirectional switch device 107 ' and 107 " circuit structure diagram; power electronics bidirectional switch device 107 ' wherein; 201 '-2 and 201 '-3 constitute; thyristor unit 201 '-1 4 aligns antiparallel thyristor T1 '-1 by what circulation linked to each other; T1 '-2; T1 '-3 and T1 '-4 and by-pass switch 202 '-1 is formed by 3 thyristor unit 201 '-1, thyristor unit 201 '-2 4 align antiparallel thyristor T2 '-1 by what circulation linked to each other, T2 '-2, T2 '-3 and T2 '-4 and by-pass switch 202 '-2 are formed, thyristor unit 201 '-3 4 align antiparallel thyristor T3 '-1 by what circulation linked to each other, T 3 '-2, T3 '-3 and T3 '-4 and by-pass switch 202 '-3 are formed, power electronics bidirectional switch device 107 " by 3 thyristor unit 201 "-1,201 " 2 and 201 "-3 constitute, thyristor unit 201 " 14 align antiparallel thyristor T1 by what circulation linked to each other "-1, T1 " 2; " 1 forms for T1 " 3 and T1 "-4 and by-pass switch 202, thyristor unit 201 " 24 align antiparallel thyristor T2 by what circulation linked to each other "-1, T2 " 2; " 2 form for T2 " 3 and T2 "-4 and by-pass switch 202, thyristor unit 201 " 34 align antiparallel thyristor T3 by what circulation linked to each other "-1, T3 " 2; " 3 form for T 3 " 3 and T3 "-4 and by-pass switch 202, because power electronics bidirectional switch device 107 ' and 107 " inner and similar to the connected mode of other parts and power electronics bidirectional switch device 107; so power electronics bidirectional switch device 107 ' with 107 " inside and with the connected mode of other parts connected mode referring to power electronics bidirectional switch device 107, do not repeat them here.
Figure 5 shows that the flow chart of homophase static reacance Poewr control method disclosed by the invention, this method comprises the steps:
The course of work of homophase static reacance power controller 101 bucking-out system AB phase reactive capabilities of the present invention is described below by three examples, and bucking-out system BC mutually with mutually similar of the AC phase course of work and AB, can analogize by following process and draw, thereby not repeat them here.At first, suppose that system voltage is 10KV, three winding rated voltages of homophase adjustable transformer secondary are respectively 200V, 600V, 1800V, when the voltage of regulating its capacitor is 12.6kV, the output heap(ed) capacity is 7Mvar, when the voltage of regulating its capacitor was 7.4kV, minimum output capacity was 2.4Mvar.
Example one is the control procedure of the mutually maximum reactive capability 7Mvar of bucking-out system AB.Control protection module 102 inquiry on off state tables (referring to table 1); obtain the on off state information of 7Mvar reactive capability correspondence; and this on off state information sent to power electronics bidirectional switch device 107; the conducting thyristor is to T1-2, T1-3, T2-2, T2-3, T3-2, T3-3, and all the other thyristors are to ending.Thyristor is to T1-2, T1-3 conducting, and rated voltage is that the secondary winding 105-1 of 200V oppositely seals in the capacitor passage, the terminal voltage rising 200V of capacitor 109.Thyristor is to T2-2, T2-3 conducting, and rated voltage is that the secondary winding 105-2 of 600V oppositely seals in the capacitor passage, the terminal voltage rising 600V of capacitor 109.Thyristor is to T3-2, T3-3 conducting, and rated voltage is that the secondary winding 105-3 of 1800V oppositely seals in the capacitor passage, the voltage rising 1800V at capacitor 109 two ends.Finally, under the constant situation of system voltage, the terminal voltage rising 2600V of capacitor 109, promptly the terminal voltage of capacitor 109 is 12600V, the mutually maximum reactive capability 7Mvar of bucking-out system AB.
Example two is the control procedure of the mutually minimum reactive capability 2.4Mvar of bucking-out system AB.Control protection module 102 inquiry on off state tables (referring to table 1); obtain the on off state information of 2.4Mvar reactive capability correspondence; and this on off state information sent to power electronics bidirectional switch device 107; the conducting thyristor is to T1-1, T1-4, T2-1, T2-4, T3-1, T3-4, and all the other thyristors are to ending.Thyristor is to T1-1, T1-4 conducting, and rated voltage is that the secondary winding 105-1 forward of 200V seals in the capacitor passage, and the terminal voltage of capacitor 109 reduces 200V.Thyristor is to T2-1, T2-4 conducting, and rated voltage is that the secondary winding 105-2 forward of 600V seals in the capacitor passage, and the terminal voltage of capacitor 109 reduces 600V.Thyristor is to T3-1, T3-4 conducting, and rated voltage is that the secondary winding 105-3 forward of 1800V seals in the capacitor passage, and the terminal voltage of capacitor 109 reduces 1800V.Finally, under the constant situation of system voltage, the terminal voltage of capacitor 109 reduces 2600V, and promptly the terminal voltage of capacitor 109 is 7400V, the mutually minimum reactive capability 2.4Mvar of bucking-out system AB.
Example three is the control procedure of 5.3Mvar for bucking-out system AB phase reactive capability.Control protection module 102 inquiry on off state tables (as shown in table 1); obtain the on off state information of 5.3Mvar reactive capability correspondence; and this on off state information sent to power electronics bidirectional switch device 107; the conducting thyristor is to T1-1, T1-4, T2-1, T2-4, T3-2, T3-3, and all the other thyristors are to ending.Thyristor is to T1-1, T1-4 conducting, and rated voltage is that the secondary winding 105-1 forward of 200V seals in the capacitor passage, and the terminal voltage of capacitor 109 reduces 200V.Thyristor is to T2-1, T2-4 conducting, and rated voltage is that the secondary winding 105-2 forward of 600V seals in the capacitor passage, and the terminal voltage of capacitor 109 reduces 600V.Thyristor is to T3-2, T3-3 conducting, and rated voltage is that the secondary winding 105-3 of 1800V oppositely seals in the capacitor passage, the terminal voltage rising 1800V of capacitor 109.Finally, under the constant situation of system voltage, the actual terminal voltage rising 1000V of capacitor 109, promptly the terminal voltage of capacitor 109 is 11000V, bucking-out system AB phase reactive capability is 5.3Mvar.
Table 1 on off state table
Annotate:, only in table 1, listed the on off state of the reactive capability correspondence that relates in the above-mentioned example because length is limited.
Each thyristor unit of the present invention 4 is aligned antiparallel thyristor and forms by what circulation linked to each other, on state characteristic according to thyristor, each thyristor unit can produce forward conduction, reverse-conducting or three state such as end, make 3 secondary windings of a homophase adjustable transformer can produce 27 grades change in voltage adjusting, the rated voltage ratio of 3 secondary windings of each homophase adjustable transformer of the present invention in addition is 1: 3: 9 to the maximum, can regulate the continuous variation of the maximum magnitude of reactive power with minimum hardware configuration realization.
Above execution mode only is used to illustrate the present invention; and be not limitation of the present invention; the those of ordinary skill in relevant technologies field; under the situation that does not break away from the spirit and scope of the present invention; can also make various variations and modification; therefore all technical schemes that are equal to also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (7)
1. homophase static reacance power controller; it is characterized in that; described controller comprises a control protection module and 3 reactive compensation modules; described control protection module links to each other with described 3 reactive compensation modules respectively; wherein said reactive compensation module comprises the homophase adjustable transformer that a secondary is made of three windings; a power electronics bidirectional switch device; a reactor and a capacitor; described power electronics bidirectional switch device links to each other with described control protection module; described homophase adjustable transformer secondary winding links to each other with described reactor and described capacitor successively by described power electronics bidirectional switch device; the scope of the rated voltage ratio of three windings of described homophase adjustable transformer secondary is 1: 3: 4 to 1: 3: 9
Described control protection module is used to gather line voltage and current signal, obtains the required idle amount of electrical network, and to described power electronics bidirectional switch device transmit button status signal,
Described power electronics bidirectional switch device, be used for according to the described switch state signal that receives, control three winding forward voltages of secondary input, the reverse voltage input of described homophase adjustable transformer or do not drop into, thereby change the terminal voltage of capacitor, export described idle amount.
2. homophase static reacance power controller according to claim 1; it is characterized in that; described power electronics bidirectional switch device is made of 3 thyristor unit; between two phase lines, each described thyristor unit links to each other with a winding and the described control protection module of described homophase adjustable transformer secondary respectively in triple line for described 3 thyristor unit and described reactor and described capacitor series.
3. homophase static reacance power controller according to claim 2, it is characterized in that, described power electronics bidirectional switch device also comprises 3 by-pass switch devices, each described thyristor unit is in parallel with a described by-pass switch device, when described by-pass switch device is used for breaking down in described thyristor unit, the described thyristor of bypass unit.
4. according to claim 2 or 3 described homophase static reacance power controllers; it is characterized in that; what described thyristor unit comprised that circulation links to each other 4 aligns antiparallel thyristor; described 4 align the mode of antiparallel thyristor by bridge joint links to each other with a winding of described homophase adjustable transformer secondary; and described 4 align between antiparallel thyristor and two phase lines of other 2 described thyristor unit, described reactors and described capacitors in series in triple line, and the trigger electrode of each described thyristor all links to each other with described control protection module.
5. homophase static reacance power controller according to claim 4 is characterized in that, the rated voltage ratio between three windings of described homophase adjustable transformer secondary is 1: 3: 9.
6. homophase static reacance power controller according to claim 1 is characterized in that, the rated voltage ratio between three windings of described homophase adjustable transformer secondary is 1: 3: 9.
7. a homophase static reacance Poewr control method is characterized in that described method comprises the steps:
Step 1 by the control protection module, is gathered line voltage and current signal, obtains the required idle amount of electrical network;
Step 2 by described control protection module, is inquired about the on off state table, obtains the on off state information of described idle amount correspondence, and described on off state information is sent to power electronics bidirectional switch device;
Step 3, described power electronics bidirectional switch device is by forward conduction, reverse-conducting or end, three winding forward voltages of secondary input, the reverse voltage input of control homophase adjustable transformer or do not drop into, thus the terminal voltage of capacitor changed, export described idle amount.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10243563A (en) * | 1997-02-26 | 1998-09-11 | Fuji Electric Co Ltd | Reactive power compensator |
| CN2631097Y (en) * | 2003-07-21 | 2004-08-04 | 西安西整电力电子设备有限责任公司 | Dynamic reactive compensating and filtering device |
| CN2660762Y (en) * | 2003-09-24 | 2004-12-01 | 石润波 | Reactive power dynamic automatic compensator |
| CN101615806A (en) * | 2009-07-29 | 2009-12-30 | 南宁微控技术有限公司 | Phase-control reactive power dynamic compensation device and compensation method thereof |
-
2011
- 2011-06-23 CN CN 201110170751 patent/CN102255316B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10243563A (en) * | 1997-02-26 | 1998-09-11 | Fuji Electric Co Ltd | Reactive power compensator |
| CN2631097Y (en) * | 2003-07-21 | 2004-08-04 | 西安西整电力电子设备有限责任公司 | Dynamic reactive compensating and filtering device |
| CN2660762Y (en) * | 2003-09-24 | 2004-12-01 | 石润波 | Reactive power dynamic automatic compensator |
| CN101615806A (en) * | 2009-07-29 | 2009-12-30 | 南宁微控技术有限公司 | Phase-control reactive power dynamic compensation device and compensation method thereof |
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