CN105680453A - Improved shunt hybrid unified power flow controller - Google Patents
Improved shunt hybrid unified power flow controller Download PDFInfo
- Publication number
- CN105680453A CN105680453A CN201610143754.1A CN201610143754A CN105680453A CN 105680453 A CN105680453 A CN 105680453A CN 201610143754 A CN201610143754 A CN 201610143754A CN 105680453 A CN105680453 A CN 105680453A
- Authority
- CN
- China
- Prior art keywords
- transverter
- winding
- parallel
- transformer
- series
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004804 winding Methods 0.000 claims abstract description 87
- 239000003990 capacitor Substances 0.000 claims description 35
- 230000008447 perception Effects 0.000 claims description 29
- 230000006872 improvement Effects 0.000 claims description 20
- 230000007935 neutral effect Effects 0.000 claims description 16
- 230000005540 biological transmission Effects 0.000 abstract description 9
- 238000009826 distribution Methods 0.000 abstract description 5
- 230000001939 inductive effect Effects 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 description 7
- 238000013016 damping Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 230000002996 emotional effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1807—Arrangements for adjusting, eliminating or compensating reactive power in networks using series compensators
- H02J3/1814—Arrangements for adjusting, eliminating or compensating reactive power in networks using series compensators wherein al least one reactive element is actively controlled by a bridge converter, e.g. unified power flow controllers [UPFC]
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
- H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/20—Arrangements for adjusting, eliminating or compensating reactive power in networks in long overhead lines
-
- 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
- Y02E40/10—Flexible AC transmission systems [FACTS]
Abstract
The invention provides an improved shunt hybrid unified power flow controller, which comprises a first current converter, a second current converter, a first offset compensation device, a second offset compensation device, a series transformer and a shunt transformer, wherein a first winding of the series transformer is connected to a power transmission line or a bus of an AC system in series; a second winding is connected to an AC end of the first current converter in parallel; a third winding is connected with the first offset compensation device in parallel; a first winding of the parallel transformer is connected to the power transmission line or the bus of the AC system in parallel; a second winding is connected with the AC end of the second current converter in parallel; and a third winding is connected with the second offset compensation device in parallel. Compared with the prior art, the improved shunt hybrid unified power flow controller can provide a certain amount of capacitive or inductive offset by the offset compensation devices, reduces the cost of the current converters, improves the utilization rate of the transformers, can also be applied to the power transmission line or a power distribution line, improves the line transmission capacity and improves the system stability level.
Description
Technical field
The present invention relates to electric and electronic technical field, it is specifically related to the parallel connection mixed type THE UPFC of a kind of improvement.
Background technology
Along with greatly developing of power system, the problems such as scale access, the spatial grid structure of new forms of energy are day by day complicated, trend distribution inequality, voltage support scarce capacity bring new challenge to the safe and stable operation of electrical network. Have there is power supply bottleneck in some areas, can not meet load development need. From electrical network practical situation, trend distribution inequality is the important factor of restriction electric network transportation ability. Tradition electrical network lacks effective power flow regulating means, by adopting novel FACTS (FlexibleAlternativeCurrentTransmisSystem) device to improve system conditions, it is to increase electrical network transmission capacity is a reality and desirable selection.
THE UPFC (UnifiedPowerFlowController, UPFC) as the 3rd generation FACTS equipment representative, the most comprehensive FACTS device of function up to now, can distinguish or realize in parallel compensating simultaneously, the multiple basic function such as series connection compensates, phase shift and terminal voltage adjustment. UPFC can realize power flow regulating in power system is stablized, conservative control wattful power, wattless power, it is to increase the transport capacity of circuit, it is achieved optimizing operation; In dynamic, can be handled up by fast reactive again, the voltage of dynamic support access point, it is to increase system voltage stabilizes; System damping can also be improved, it is to increase power-angle stability.
Conventional THE UPFC controlling functions is remarkable flexibly, but it is promoted the use of in power system and does not possess capacity and price advantage. Traditional capacitor, reactor can be used as circuit series connection and compensate, but handiness and action speed all can not meet the requirement of fine adjustment. THE UPFC needs functional configuration more flexibly, it is necessary to series connection is compensated and combines with THE UPFC, and simple fixing capacitive series connection compensates the system demand that can not meet complicated change..
Summary of the invention
In order to meet the needs of prior art, the present invention provides the parallel connection mixed type THE UPFC of a kind of improvement.
The technical scheme of the present invention is:
Described THE UPFC comprises the first transverter, the 2nd transverter, the first offset compensation device, the 2nd offset compensation device, series transformer and shunt transformer;
Described series transformer is three-winding transformer: the transmitting line of the first windings in series incoming transport system or bus, and these winding two ends are parallel with bypass switch; 2nd winding exchanges end parallel connection with described first transverter; The tertiary winding is in parallel with described first offset compensation device;
Described shunt transformer is three-winding transformer: the transmitting line of the first winding parallel incoming transport system or bus, and the 2nd winding exchanges end parallel connection with described 2nd transverter, and the tertiary winding is in parallel with described 2nd offset compensation device;
The DC terminal of described first transverter and the DC terminal of the 2nd transverter are interconnected.
A preferred embodiment provided by the invention is:
During described first transverter employing three-phase bridge transverter, one end of described first offset compensation device is connected with the tertiary winding of described series transformer, and in the neutral point of the other end and described series transformer or exchange system, arbitrary neutral point of all the other neutral points is connected;
During described 2nd transverter employing three phase full bridge transverter, described one end of 2nd offset compensation device is connected with the tertiary winding of described shunt transformer, and in the neutral point of the other end and described shunt transformer or exchange system, arbitrary neutral point of all the other neutral points is connected.
A preferred embodiment provided by the invention is:
Described first offset compensation device and the 2nd offset compensation device include any one in capacitive skew type compensation equipment, perception skew type compensation equipment and two-way skew type compensation equipment;
Described capacitive skew type compensation equipment comprises capacitor unit and first switching arrangement of series connection;
Described perception skew type compensation equipment comprises reactor unit and the 2nd switching arrangement of series connection;
Described two-way skew type compensation equipment comprises described capacitive skew type compensation equipment in parallel and perception skew type compensation equipment.
A preferred embodiment provided by the invention is:
Described capacitor unit comprises an electrical condenser or the series capacitor bank being made up of multiple electrical condenser or the Shunt Capacitor Unit being made up of multiple electrical condenser; Described Shunt Capacitor Unit comprises automatic switching switch, and this automatic switching switch is for dropping into and exit the electrical condenser in Shunt Capacitor Unit, thus the capacitance realizing Shunt Capacitor Unit regulates;
Described reactor unit comprises a reactor or the parallel reactor group composed in parallel by multiple reactor or the series reactance device group being composed in series by multiple reactor; The reactor of described series reactance device group is provided with tap.
A preferred embodiment provided by the invention is: described first switching arrangement and the 2nd switching arrangement include any two switches of any one switch or parallel connection in isolating switch, isolator and power electronics switch;
Described power electronics switch comprises the thyristor two-way switch being made up of thyristor oppositely in parallel, adjusts the equivalent impedance of described reactor unit by changing the triggering angle of described thyristor.
A preferred embodiment provided by the invention is: described two-way skew type compensation equipment comprises capacitive modes of deflection and perception modes of deflection;
Described capacitive modes of deflection comprises:
Described first switching arrangement closes, and the 2nd switching arrangement disconnects, then described two-way skew type compensation equipment works in capacitive modes of deflection;Or,
During described 2nd switching arrangement employing thyristor two-way switch, by adjusting the triggering angle of its thyristor, make the equivalent reactance of described reactor unit be less than the equivalent capacitive reactance of described capacitor unit, then described two-way skew type compensation equipment works in capacitive modes of deflection;
Described perception modes of deflection comprises:
Described first switching arrangement disconnects, and the 2nd switching arrangement closes, then described two-way skew type compensation equipment works in perception modes of deflection; Or,
During described 2nd switching arrangement employing thyristor two-way switch, by adjusting the triggering angle of its thyristor, make the equivalent reactance of described reactor unit be greater than the equivalent capacitive reactance of described capacitor unit, then described two-way skew type compensation equipment works in perception modes of deflection.
A preferred embodiment provided by the invention is: described THE UPFC comprises series side skew structure and skew structure in side in parallel.
A preferred embodiment provided by the invention is: when described THE UPFC adopts series side to offset structure, comprising: the first transverter, the 2nd transverter, the first offset compensation device, series transformer and shunt transformer;
Described series transformer is three-winding transformer: the transmitting line of the first windings in series incoming transport system or bus, and these winding two ends are parallel with bypass switch; 2nd winding exchanges end parallel connection with described first transverter; The tertiary winding is in parallel with described first offset compensation device; The DC terminal of described first transverter and the DC terminal of the 2nd transverter are interconnected;
Described shunt transformer is duplex winding transformer: the transmitting line of the first winding parallel incoming transport system or bus, and the 2nd winding exchanges end parallel connection with described 2nd transverter.
A preferred embodiment provided by the invention is: when described THE UPFC adopts side in parallel to offset structure, comprising: the first transverter, the 2nd transverter, the 2nd offset compensation device, series transformer and shunt transformer;
Described series transformer is duplex winding transformer: the transmitting line of the first windings in series incoming transport system or bus, and these winding two ends are parallel with bypass switch; 2nd winding exchanges end parallel connection with described first transverter, and the DC terminal of described first transverter and the DC terminal of the 2nd transverter are interconnected;
Described shunt transformer is three-winding transformer: the transmitting line of the first winding parallel incoming transport system or bus, and the 2nd winding exchanges end parallel connection with described 2nd transverter, and the tertiary winding is in parallel with described 2nd offset compensation device.
A preferred embodiment provided by the invention is: described first transverter and the 2nd transverter include any one in two level converters, three-level converter, diode clamp bit-type transverter, striding capacitance type transverter, modularization multi-level converter and H bridge cascade multi-level converter or at least two kinds;
The structure of described first transverter and the 2nd transverter all adopts any one of phase structure, three-phase structure and 3 phase structure.
Compared with immediate prior art, the invention has the beneficial effects as follows:
1, the parallel connection mixed type THE UPFC of a kind of improvement provided by the invention, may be used in transmitting line or distribution line, carry out capacitive or perception adjustment, improve circuit transmission capacity, improve system stability level, control circuit trend, enhanced system damping, solve existing THE UPFC can not the problem of quick adjustment on a large scale continuously, reduce THE UPFC cost;
2, the parallel connection mixed type THE UPFC of a kind of improvement provided by the invention, reduces the insulation level of reactor and electrical condenser, it is to increase dynamic response performance;The capacity of voltage source converter can be reduced simultaneously.
3, the parallel connection mixed type THE UPFC of a kind of improvement provided by the invention, reactor unit can realize the adjustment of capacitance by automatic switching switch, the thyristor two-way switch of reactor unit parallel connection can regulate reactance continuously, thus realize the classification to equivalence capacitive reactance and regulate continuously, lay particular emphasis on Steady-State Control; Transverter can provide continuously two-ways regulation ability fast, lays particular emphasis on Dynamic controlling.
Accompanying drawing explanation
Fig. 1: the parallel connection mixed type THE UPFC structural representation of a kind of improvement in the embodiment of the present invention;
Fig. 2: the parallel connection mixed type THE UPFC structural representation that in the embodiment of the present invention, another kind improves;
Fig. 3: the parallel connection mixed type THE UPFC structural representation that in the embodiment of the present invention, another improves;
Fig. 4: series side skew structural representation in the embodiment of the present invention;
Fig. 5: skew structural representation in side in parallel in the embodiment of the present invention;
Fig. 6: perception skew type compensation equipment structural representation in the embodiment of the present invention;
Fig. 7: capacitive skew type compensation equipment structural representation in the embodiment of the present invention;
Fig. 8: two-way skew type compensation equipment structural representation in the embodiment of the present invention;
Fig. 9: another kind of two-way skew type compensation equipment structural representation in the embodiment of the present invention;
Wherein, 101: the first transverter; 102: the two transverters; 103: the first offset compensation device; 104: the two offset compensation device; 105: series transformer; 106: shunt transformer; 107: bypass switch; 108: stake resistance.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is illustrated clearly and completely, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments. Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
Below respectively by reference to the accompanying drawings, the parallel connection mixed type THE UPFC of a kind of improvement that the embodiment of the present invention provides is described.
Fig. 1 is the parallel connection mixed type THE UPFC structural representation of a kind of improvement in the embodiment of the present invention, as shown in the figure, THE UPFC comprises the first transverter 101, the 2nd transverter 102, first offset compensation device 103, the 2nd offset compensation device 104, series transformer 105 and shunt transformer 106. Wherein,
Series transformer 105 is three-winding transformer: the transmitting line of the first windings in series incoming transport system or bus, and these winding two ends are parallel with bypass switch 107; 2nd winding exchanges end parallel connection with the first transverter 101; The tertiary winding is in parallel with the first offset compensation device 103.
Shunt transformer 106 is three-winding transformer: the transmitting line of the first winding parallel incoming transport system or bus, and the 2nd winding exchanges end parallel connection with the 2nd transverter 102, and the tertiary winding is in parallel with the 2nd offset compensation device 104.
The DC terminal of the first transverter 101 and the DC terminal of the 2nd transverter 102 are interconnected.
In the present invention, the first transverter 101 and the 2nd transverter 102 include any one in two level converters, three-level converter, diode clamp bit-type transverter, striding capacitance type transverter, modularization multi-level converter and H bridge cascade multi-level converter or at least two kinds;The structure of the first transverter 101 and the 2nd transverter 102 all adopts any one of phase structure, three-phase structure and 3 phase structure.
Fig. 2 is the parallel connection mixed type THE UPFC structural representation that in the embodiment of the present invention, another kind improves, and Fig. 3 is the parallel connection mixed type THE UPFC structural representation that in the embodiment of the present invention, another improves, as shown in the figure, in the present embodiment:
When first transverter 101 adopts three-phase bridge transverter, one end of the first offset compensation device 103 is connected with the tertiary winding of series transformer 105, and in the neutral point of the other end and series transformer 105 or exchange system, the neutral point of arbitrary transmitting line is connected. When 2nd transverter 102 adopts three-phase bridge transverter, one end of the 2nd offset compensation device 104 is connected with the tertiary winding of shunt transformer 104, and in the neutral point of the other end and shunt transformer 104 or exchange system, the neutral point of arbitrary transmitting line is connected.
In the present invention, THE UPFC comprises series side skew structure and skew structure in side in parallel, wherein;
1, series side skew structure
Fig. 4 is figure series side skew structural representation in the embodiment of the present invention, as shown in the figure, when in the present embodiment, THE UPFC adopts series side to offset structure, comprising: the first transverter 101, the 2nd transverter 102, first offset compensation device 103, series transformer 105 and shunt transformer 106.
Series transformer 105 is three-winding transformer: the transmitting line of the first windings in series incoming transport system or bus, and these winding two ends are parallel with bypass switch 107; 2nd winding exchanges end parallel connection with the first transverter 101; The tertiary winding is in parallel with the first offset compensation device 103; The DC terminal of the first transverter 101 and the DC terminal of the 2nd transverter 102 are interconnected;
Shunt transformer 106 is duplex winding transformer: the transmitting line of the first winding parallel incoming transport system or bus, and the 2nd winding exchanges end parallel connection with the 2nd transverter 102.
In the present embodiment, reactor unit, capacitor unit and inverter unit access the side of series transformer after being connected in parallel. By regulating the IGBT group angle of thyristor two-way switch in the first switching arrangement, regulating and be incorporated to the reactance value of reactor unit, the automatic switching of Capacitor banks can regulate the capacitance being incorporated to electrical condenser, and inverter unit can realize taking Zinv as the impedance circle of radius. Regulated the impedance that can control to be injected into system side by the equivalent impedance of reactor unit, capacitor unit and transverter, thus realize the dynamic adjustments of impedance on a large scale.
2, skew structure in side in parallel
Fig. 5 is skew structural representation in side in parallel in the embodiment of the present invention, as shown in the figure, when in the present embodiment, THE UPFC adopts side in parallel to offset structure, comprising: the first transverter 101, the 2nd transverter 102, the 2nd offset compensation device 104, series transformer 105 and shunt transformer 106.
Series transformer 105 is duplex winding transformer: the transmitting line of the first windings in series incoming transport system or bus, and these winding two ends are parallel with bypass switch 107; 2nd winding exchanges end parallel connection with the first transverter 101, and the DC terminal of the first transverter 101 and the DC terminal of the 2nd transverter 102 are interconnected;
Shunt transformer 106 is three-winding transformer: the transmitting line of the first winding parallel incoming transport system or bus, and the 2nd winding exchanges end parallel connection with the 2nd transverter 102, and the tertiary winding is in parallel with the 2nd offset compensation device 104.
In the present invention, the first offset compensation device and the 2nd offset compensation device include any one in capacitive skew type compensation equipment, perception skew type compensation equipment or two-way skew type compensation equipment, wherein:
Fig. 6 is perception skew type compensation equipment structural representation in the embodiment of the present invention, and as shown in the figure, in the present embodiment, perception skew type compensation equipment comprises reactor unit and the 2nd switching arrangement of series connection.
Fig. 7 is capacitive skew type compensation equipment structural representation in the embodiment of the present invention, and as shown in the figure, in the present embodiment, capacitive skew type compensation equipment comprises capacitor unit and first switching arrangement of series connection.
Fig. 8 is two-way skew type compensation equipment structural representation in the embodiment of the present invention, and as shown in the figure, in the present embodiment, two-way skew type compensation equipment comprises capacitive skew type compensation equipment in parallel and perception skew type compensation equipment. Two-way skew type compensation equipment comprises capacitive modes of deflection and perception modes of deflection.
Fig. 9 is another kind of two-way skew type compensation equipment structural representation in the embodiment of the present invention, and as shown in the figure, in the present embodiment, two-way skew type compensation equipment comprises reactor, electrical condenser, two-way thyristor switch, thunder arrester MOV and bypass switch S.
1, capacitive modes of deflection comprises two kinds of technical schemes:
The first technical scheme:
First switching arrangement closes, and the 2nd switching arrangement disconnects, then two-way skew type compensation equipment works in capacitive modes of deflection.
2nd kind of technical scheme:
During the 2nd switching arrangement employing thyristor two-way switch, by adjusting the triggering angle of its thyristor so that the equivalent reactance of reactor unit is less than the equivalent capacitive reactance of capacitor unit, then two-way skew type compensation equipment works in capacitive modes of deflection.
2, perception modes of deflection comprises two kinds of technical schemes:
The first technical scheme:
First switching arrangement disconnects, and the 2nd switching arrangement closes, then two-way skew type compensation equipment works in perception modes of deflection.
2nd kind of technical scheme;
During the 2nd switching arrangement employing thyristor two-way switch, by adjusting the triggering angle of its thyristor so that the equivalent reactance of reactor unit is greater than the equivalent capacitive reactance of capacitor unit, then two-way skew type compensation equipment works in perception modes of deflection.
In the present invention, the structure of reactor unit, capacitor unit and switching arrangement is:
1, capacitor unit
In the present embodiment, capacitor unit comprises an electrical condenser or the series capacitor bank being made up of multiple electrical condenser or the Shunt Capacitor Unit being made up of multiple electrical condenser; Shunt Capacitor Unit comprises automatic switching switch, and this automatic switching switch is for dropping into and exit the electrical condenser in Shunt Capacitor Unit, thus the capacitance realizing Shunt Capacitor Unit regulates.
One, capacitive compensation pattern
The capacitive reactance setting capacitor unit 101 in the present embodiment is Xc, the equivalent impedance scope of the first transverter 101 is being within the circle of radius taking Zinv, and capacitive compensation is just to compensation, then the compensation scope of the parallel connection mixed type THE UPFC improved under capacitive compensation pattern in device side is capacitive reactance Xc and the vector sum of transverter impedance Z inv.
In the present embodiment, the IGBT group angle of the first switching arrangement can regulate continuously, the impedance that the first transverter 101 seals in can also be regulated, first transverter 101 has response speed faster, can be used for enhanced system damping, the dynamic response capability of further raising system. By dropping into different condenser capacities, it is possible to obtain capacitive reactance Xc so that the parallel connection mixed type THE UPFC of this improvement realizes dynamic adjustments while classification regulates, and has bigger dynamic adjustments scope.
2, reactor unit
In the present embodiment, reactor unit comprises a reactor or the parallel reactor group composed in parallel by multiple reactor or the series reactance device group being composed in series by multiple reactor; The reactor of series reactance device group is provided with tap.
The reactance setting reactor in the present embodiment is XL, the equivalent impedance scope of the first transverter 101 is being within the circle of radius taking Zinv, and capacitive compensation is just to compensation, then the compensation scope of the parallel connection mixed type THE UPFC improved under perception compensation model in device side is reactance XL and the vector sum of transverter impedance Z inv.
If transmission line outlet fault in the present embodiment, in order to reduce the short-circuit current of transmitting line, reduce the energy that thunder arrester absorbs, then control the whole conducting of thyristor in the 2nd switching arrangement, simultaneously can also the impedance value that seals in of quick adjustment first transverter 101, it is to increase the dynamic response capability of system. When realize capacitive compensation pattern to perception compensation model dynamic adjustments time, the maximum inductive of the parallel connection mixed type THE UPFC of improvement in device side is compensated as-XL-Zinv, and maximum capacitive is compensated as Xc+Zinv.
3, the first switching arrangement and the 2nd switching arrangement
In the present embodiment, the first switching arrangement and the 2nd switching arrangement include any two switches of any one switch or parallel connection in isolating switch, isolator and power electronics switch;
Power electronics switch comprises the thyristor two-way switch being made up of thyristor oppositely in parallel, adjusts the equivalent impedance of described reactor unit by changing the triggering angle of thyristor.
The working process of the parallel connection mixed type THE UPFC embodiment of the present invention preferably improved below is described:
1, the non-connecting system of parallel connection mixed type THE UPFC improved
Before the parallel connection mixed type THE UPFC connecting system improved, bypass switch arrangement closes, the thyristor two-way switch locking of the first transverter 101 and the first switching arrangement, the 2nd switching arrangement, the parallel connection mixed type THE UPFC improved is in bypass condition, the running status of system is not had any impact.
2, the parallel connection mixed type THE UPFC connecting system improved
The parallel connection mixed type THE UPFC improved determines the impedance value needing to compensate according to upper strata dispatch command and actual operating mode. When the reactance of long distance transmitting line is bigger, it is necessary to operate in capacitive compensation pattern, compensate the reactance of transmitting line, reduce transmission loss. When transmitting line owing to the reasons such as short trouble or load increase, parallel line tripping cause overload, it is necessary to operate in emotional resistance compensation model, restriction current amplitude. By controlling the first switching arrangement, the break-make of the 2nd switching arrangement or regulate the IGBT group angle of thyristor two-way switch in the 2nd switch, the parallel connection mixed type THE UPFC improved is made to be operated in capacitive compensation pattern or perception compensation model, need, according to what system damping regulated, the operation controlling the first transverter 101, it is to increase system dynamics responds simultaneously.
The sfgd. of the parallel connection mixed type THE UPFC improved in the embodiment of the present invention when the system fault or device fault mainly comprises:
1, when system side generation fault, such as, when circuit generation single-phase earthing fault or circuit overcurrent, it is the parallel connection mixed type THE UPFC that protection improves, it is necessary to the 2nd switching arrangement is closed, exits the operation of the first transverter 101.
When 2, there is fault in the first transverter 101 inside, it is necessary to by the switch device tripping pulse locking of the first transverter 101, exiting the operation of the first transverter 101, now reactor unit and capacitor unit still can carry out capacitive compensation or perception compensation.
One of ordinary skill in the art will appreciate that all or part of flow process realizing in above-described embodiment method, it is can be completed by the hardware that computer program carrys out instruction relevant, described program can be stored in a computer read/write memory medium, this program, when performing, can comprise the flow process of the embodiment such as above-mentioned each side method. Wherein, described storage media can be magnetic disc, CD, read-only storage memory body (Read-Only, ROM) or random storage and remembers body (RandomAccessMemory, RAM) etc. Meanwhile, the present invention does not mark the equipment such as the thunder arrester for the protection of electrical condenser, series transformer, transverter and switching arrangement thereof, gap, when indication device does not manufacture and design the actual enforcement with engineering, there are not these equipment. When actual engineering is implemented, have in many present embodiment accompanying drawings do not mark isolation knife lock, isolating switch, current measure device, voltage measuring apparatus, when not representing the actual enforcement of engineering, there are not these equipment.
The parallel connection mixed type THE UPFC improved in the embodiment of the present invention, may be used in transmitting line or distribution line, carry out capacitive or perception adjustment, improve circuit transmission capacity, improve system stability level, control circuit trend, enhanced system damping, solve existing THE UPFC can not the problem of quick adjustment on a large scale continuously, reduce THE UPFC cost.
Obviously, the present invention can be carried out various change and modification and not depart from the spirit and scope of the present invention by the technician of this area. Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these change and modification.
Claims (10)
1. the parallel connection mixed type THE UPFC improved, it is characterised in that, described THE UPFC comprises the first transverter, the 2nd transverter, the first offset compensation device, the 2nd offset compensation device, series transformer and shunt transformer;
Described series transformer is three-winding transformer: the transmitting line of the first windings in series incoming transport system or bus, and these winding two ends are parallel with bypass switch; 2nd winding exchanges end parallel connection with described first transverter; The tertiary winding is in parallel with described first offset compensation device;
Described shunt transformer is three-winding transformer: the transmitting line of the first winding parallel incoming transport system or bus, and the 2nd winding exchanges end parallel connection with described 2nd transverter, and the tertiary winding is in parallel with described 2nd offset compensation device;
The DC terminal of described first transverter and the DC terminal of the 2nd transverter are interconnected.
2. the parallel connection mixed type THE UPFC of a kind of improvement as claimed in claim 1, it is characterised in that,
During described first transverter employing three-phase bridge transverter, in one end of described first offset compensation device and the 2nd winding switching of described series transformer, the neutral point of the other end and described series transformer or exchange system, arbitrary neutral point of all the other neutral points is connected;
During described 2nd transverter employing three-phase bridge transverter, in one end of described 2nd offset compensation device and the 2nd winding switching of described shunt transformer, the neutral point of the other end and described shunt transformer or exchange system, arbitrary neutral point of all the other neutral points is connected.
3. the parallel connection mixed type THE UPFC of a kind of improvement as claimed in claim 1, it is characterised in that,
Described first offset compensation device and the 2nd offset compensation device include any one in capacitive skew type compensation equipment, perception skew type compensation equipment and two-way skew type compensation equipment;
Described capacitive skew type compensation equipment comprises capacitor unit and first switching arrangement of series connection;
Described perception skew type compensation equipment comprises reactor unit and the 2nd switching arrangement of series connection;
Described two-way skew type compensation equipment comprises described capacitive skew type compensation equipment in parallel and perception skew type compensation equipment.
4. the parallel connection mixed type THE UPFC of a kind of improvement as claimed in claim 3, it is characterised in that,
Described capacitor unit comprises an electrical condenser or the series capacitor bank being made up of multiple electrical condenser or the Shunt Capacitor Unit being made up of multiple electrical condenser; Described Shunt Capacitor Unit comprises automatic switching switch, and this automatic switching switch is for dropping into and exit the electrical condenser in Shunt Capacitor Unit, thus the capacitance realizing Shunt Capacitor Unit regulates;
Described reactor unit comprises a reactor or the parallel reactor group composed in parallel by multiple reactor or the series reactance device group being composed in series by multiple reactor; The reactor of described series reactance device group is provided with tap.
5. the parallel connection mixed type THE UPFC of a kind of improvement as claimed in claim 3, it is characterized in that, described first switching arrangement and the 2nd switching arrangement include any two switches of any one switch or parallel connection in isolating switch, isolator and power electronics switch;
Described power electronics switch comprises the thyristor two-way switch being made up of thyristor oppositely in parallel, adjusts the equivalent impedance of described reactor unit by changing the triggering angle of described thyristor.
6. the parallel connection mixed type THE UPFC of a kind of improvement as claimed in claim 3, it is characterised in that, described two-way skew type compensation equipment comprises capacitive modes of deflection and perception modes of deflection;
Described capacitive modes of deflection comprises:
Described first switching arrangement closes, and the 2nd switching arrangement disconnects, then described two-way skew type compensation equipment works in capacitive modes of deflection; Or,
During described 2nd switching arrangement employing thyristor two-way switch, by adjusting the triggering angle of its thyristor, make the equivalent reactance of described reactor unit be less than the equivalent capacitive reactance of described capacitor unit, then described two-way skew type compensation equipment works in capacitive modes of deflection;
Described perception modes of deflection comprises:
Described first switching arrangement disconnects, and the 2nd switching arrangement closes, then described two-way skew type compensation equipment works in perception modes of deflection; Or,
During described 2nd switching arrangement employing thyristor two-way switch, by adjusting the triggering angle of its thyristor, make the equivalent reactance of described reactor unit be greater than the equivalent capacitive reactance of described capacitor unit, then described two-way skew type compensation equipment works in perception modes of deflection.
7. the parallel connection mixed type THE UPFC of a kind of improvement as claimed in claim 1, it is characterised in that, described THE UPFC comprises series side skew structure and skew structure in side in parallel.
8. the parallel connection mixed type THE UPFC of a kind of improvement as claimed in claim 7, it is characterized in that, when described THE UPFC adopts series side to offset structure, comprising: the first transverter, the 2nd transverter, the first offset compensation device, series transformer and shunt transformer;
Described series transformer is three-winding transformer: the transmitting line of the first windings in series incoming transport system or bus, and these winding two ends are parallel with bypass switch; 2nd winding exchanges end parallel connection with described first transverter; The tertiary winding is in parallel with described first offset compensation device; The DC terminal of described first transverter and the DC terminal of the 2nd transverter are interconnected;
Described shunt transformer is duplex winding transformer: the transmitting line of the first winding parallel incoming transport system or bus, and the 2nd winding exchanges end parallel connection with described 2nd transverter.
9. the parallel connection mixed type THE UPFC of a kind of improvement as claimed in claim 7, it is characterized in that, when described THE UPFC adopts side in parallel to offset structure, comprising: the first transverter, the 2nd transverter, the 2nd offset compensation device, series transformer and shunt transformer;
Described series transformer is duplex winding transformer: the transmitting line of the first windings in series incoming transport system or bus, and these winding two ends are parallel with bypass switch; 2nd winding exchanges end parallel connection with described first transverter, and the DC terminal of described first transverter and the DC terminal of the 2nd transverter are interconnected;
Described shunt transformer is three-winding transformer: the transmitting line of the first winding parallel incoming transport system or bus, and the 2nd winding exchanges end parallel connection with described 2nd transverter, and winding is in parallel with described 2nd offset compensation device.
10. the parallel connection mixed type THE UPFC of a kind of improvement as claimed in claim 1, it is characterized in that, described first transverter and the 2nd transverter include any one in two level converters, three-level converter, diode clamp bit-type transverter, striding capacitance type transverter, modularization multi-level converter and H bridge cascade multi-level converter or at least two kinds;
The structure of described first transverter and the 2nd transverter all adopts any one of phase structure, three-phase structure and 3 phase structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610143754.1A CN105680453B (en) | 2016-03-14 | 2016-03-14 | Improved parallel hybrid unified power flow controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610143754.1A CN105680453B (en) | 2016-03-14 | 2016-03-14 | Improved parallel hybrid unified power flow controller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105680453A true CN105680453A (en) | 2016-06-15 |
| CN105680453B CN105680453B (en) | 2024-02-02 |
Family
ID=56310276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610143754.1A Active CN105680453B (en) | 2016-03-14 | 2016-03-14 | Improved parallel hybrid unified power flow controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105680453B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106208009A (en) * | 2016-09-27 | 2016-12-07 | 上海北堃电力科技有限公司 | A kind of capacitor protection equipment and series compensation device |
| CN107425526A (en) * | 2017-06-12 | 2017-12-01 | 武汉理工大学 | Distributed Power Flow controller one phase equivalent emulation mode |
| WO2018033059A1 (en) * | 2016-08-16 | 2018-02-22 | 南京南瑞继保电气有限公司 | Series compensation device applicable to double-circuit line |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5814975A (en) * | 1995-06-05 | 1998-09-29 | Westinghouse Electric Corporation | Inverter controlled series compensator |
| JP2003070251A (en) * | 2001-08-22 | 2003-03-07 | Toshiba Corp | Voltage adjuster |
| CN102035196A (en) * | 2010-12-30 | 2011-04-27 | 东南大学 | Thyristor controlled series compensator-based fault current limiting device |
| CN102214917A (en) * | 2011-06-15 | 2011-10-12 | 中电普瑞科技有限公司 | Intelligent fault current limiter |
| CN102969708A (en) * | 2012-07-13 | 2013-03-13 | 中电普瑞科技有限公司 | Interline power flow controller based on modular multi-level converter structure |
| CN103955141A (en) * | 2014-05-09 | 2014-07-30 | 国家电网公司 | Test circuit and method for low-voltage physical model of unified power flow controller |
| CN104124682A (en) * | 2014-07-23 | 2014-10-29 | 南京南瑞继保电气有限公司 | Convertible unified power flow controller |
| CN104348167A (en) * | 2013-07-26 | 2015-02-11 | 南京南瑞继保电气有限公司 | Static synchronous series compensator start method |
| CN204304441U (en) * | 2014-12-02 | 2015-04-29 | 深圳市贝壳电气技术有限公司 | A kind of reactive power dynamic compensation system |
| CN104767191A (en) * | 2015-04-09 | 2015-07-08 | 国家电网公司 | Converter grounding system |
| WO2015176546A1 (en) * | 2014-05-19 | 2015-11-26 | 南京南瑞继保电气有限公司 | Unified power flow controller for double-circuit line |
| CN205595798U (en) * | 2016-03-14 | 2016-09-21 | 全球能源互联网研究院 | Modified compounding in parallel type unified power flow controller |
-
2016
- 2016-03-14 CN CN201610143754.1A patent/CN105680453B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5814975A (en) * | 1995-06-05 | 1998-09-29 | Westinghouse Electric Corporation | Inverter controlled series compensator |
| JP2003070251A (en) * | 2001-08-22 | 2003-03-07 | Toshiba Corp | Voltage adjuster |
| CN102035196A (en) * | 2010-12-30 | 2011-04-27 | 东南大学 | Thyristor controlled series compensator-based fault current limiting device |
| CN102214917A (en) * | 2011-06-15 | 2011-10-12 | 中电普瑞科技有限公司 | Intelligent fault current limiter |
| CN102969708A (en) * | 2012-07-13 | 2013-03-13 | 中电普瑞科技有限公司 | Interline power flow controller based on modular multi-level converter structure |
| CN104348167A (en) * | 2013-07-26 | 2015-02-11 | 南京南瑞继保电气有限公司 | Static synchronous series compensator start method |
| CN103955141A (en) * | 2014-05-09 | 2014-07-30 | 国家电网公司 | Test circuit and method for low-voltage physical model of unified power flow controller |
| WO2015176546A1 (en) * | 2014-05-19 | 2015-11-26 | 南京南瑞继保电气有限公司 | Unified power flow controller for double-circuit line |
| CN104124682A (en) * | 2014-07-23 | 2014-10-29 | 南京南瑞继保电气有限公司 | Convertible unified power flow controller |
| CN204304441U (en) * | 2014-12-02 | 2015-04-29 | 深圳市贝壳电气技术有限公司 | A kind of reactive power dynamic compensation system |
| CN104767191A (en) * | 2015-04-09 | 2015-07-08 | 国家电网公司 | Converter grounding system |
| CN205595798U (en) * | 2016-03-14 | 2016-09-21 | 全球能源互联网研究院 | Modified compounding in parallel type unified power flow controller |
Non-Patent Citations (1)
| Title |
|---|
| 夏时光: "双电源环网统一潮流控制器串联单元设计", vol. 2013, no. 12, pages 11 - 16 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018033059A1 (en) * | 2016-08-16 | 2018-02-22 | 南京南瑞继保电气有限公司 | Series compensation device applicable to double-circuit line |
| US10396562B2 (en) | 2016-08-16 | 2019-08-27 | Nr Electric Co., Ltd | Series compensation device applicable to double-circuit line |
| CN106208009A (en) * | 2016-09-27 | 2016-12-07 | 上海北堃电力科技有限公司 | A kind of capacitor protection equipment and series compensation device |
| CN107425526A (en) * | 2017-06-12 | 2017-12-01 | 武汉理工大学 | Distributed Power Flow controller one phase equivalent emulation mode |
| CN107425526B (en) * | 2017-06-12 | 2019-07-23 | 武汉理工大学 | Distributed Power Flow controller one phase equivalent emulation mode |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105680453B (en) | 2024-02-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205595798U (en) | Modified compounding in parallel type unified power flow controller | |
| Song et al. | Flexible ac transmission systems (FACTS) | |
| US20180076622A1 (en) | Expanded Reactive Following for Distributed Generation and Loads of Other Reactive Controller(s) | |
| CN105703370B (en) | Unified power flow controller combining series compensation and current converter | |
| Bocovich et al. | Overview of series connected flexible AC transmission systems (FACTS) | |
| CN105680453A (en) | Improved shunt hybrid unified power flow controller | |
| CN205544288U (en) | Unified power flow controller who combines with transverter is mended to cluster | |
| CN106816881B (en) | Series compensation device and capacity optimization method thereof | |
| CN105977972B (en) | A kind of Static Synchronous Series compensation device mended and combined with transverter of going here and there | |
| Sen et al. | Unique capabilities of Sen Transformer: A power flow regulating transformer | |
| CN103238258B (en) | Reactive power compensator, computer programs and computer program products | |
| CN205544326U (en) | Combined unified power flow controller | |
| CN105703376A (en) | Mixed type unified power flow controller | |
| CN115173422B (en) | Interconnection type power supply transformer and regulation and control method thereof | |
| Shicong et al. | Guide for voltage regulation and reactive power compensation at 1000kV AC and above with IEEE P1860 standard | |
| Shimpi et al. | Flexible AC transmission systems | |
| CN105703392B (en) | Combined type unified power flow controller | |
| Sen et al. | SMART Power Flow Controller for smarter grid applications | |
| Grünbaum et al. | FACTS-intelligent solutions for meeting challenges in power transmission | |
| Grünbaum et al. | FACTS for cost-effective improvement of power feeding of large mining complexes | |
| Betancourt et al. | Distribution transformer with electronic tap changer featuring robust low current zero switching | |
| CN220553819U (en) | High-voltage ac line voltage stabilizer | |
| Sivachandran et al. | Improvement of power system stability using D-FACTS controllers: a review | |
| Singh et al. | A Review of Power Quality Improvements by using FACTS devices | |
| CN102074959B (en) | Thyristor valve-controlled controlled shunt reactor device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 102209 Beijing City, the future of science and Technology City Binhe Road, No. 18, No. Applicant after: GLOBAL ENERGY INTERCONNECTION RESEARCH INSTITUTE Co.,Ltd. Applicant after: STATE GRID CORPORATION OF CHINA Address before: 102211 Beijing city Changping District Xiaotangshan town big East Village Road No. 270 (future technology city) Applicant before: GLOBAL ENERGY INTERCONNECTION RESEARCH INSTITUTE Applicant before: State Grid Corporation of China |
|
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhao Guoliang Inventor after: Deng Zhanfeng Inventor after: Gao Xiaoqing Inventor after: Lin Jun Inventor after: Pan Zhengyu Inventor after: Zhao Bin Inventor after: Ding Chun Inventor after: Xie Wei Inventor after: Song Jieying Inventor after: Lu Zhengang Inventor after: Hua Bin Inventor after: Lieutenant Zhiyong Inventor after: Cai Linhai Inventor after: Shi Zhixiong Inventor after: Dai Chaobo Inventor before: Zhao Guoliang Inventor before: Song Jieying Inventor before: Lu Zhengang Inventor before: Lieutenant Zhiyong Inventor before: Cai Linhai Inventor before: Dai Chaobo Inventor before: Deng Zhanfeng |
|
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20191210 Address after: 102209 Beijing City, the future of science and Technology City Binhe Road, No. 18, No. Applicant after: GLOBAL ENERGY INTERCONNECTION RESEARCH INSTITUTE Co.,Ltd. Applicant after: STATE GRID SHANGHAI MUNICIPAL ELECTRIC POWER Co. Applicant after: STATE GRID CORPORATION OF CHINA Address before: 102209 Beijing City, the future of science and Technology City Binhe Road, No. 18, No. Applicant before: GLOBAL ENERGY INTERCONNECTION RESEARCH INSTITUTE Co.,Ltd. Applicant before: STATE GRID CORPORATION OF CHINA |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |