CN110137983A - A kind of phase shifter of short circuit current in limitation circuit on power system - Google Patents
A kind of phase shifter of short circuit current in limitation circuit on power system Download PDFInfo
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- CN110137983A CN110137983A CN201910317654.XA CN201910317654A CN110137983A CN 110137983 A CN110137983 A CN 110137983A CN 201910317654 A CN201910317654 A CN 201910317654A CN 110137983 A CN110137983 A CN 110137983A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
- H02H9/021—Current limitation using saturable reactors
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- 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
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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- 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
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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Abstract
The application provides a kind of phase shifter for limiting the short circuit current in circuit on power system.The phase shifter includes: series transformer, and series connection accesses in the route, and the series transformer includes series transformer first side winding and series transformer secondary side winding；Shunt transformer, connects the series transformer, and the shunt transformer includes shunt transformer first side winding and shunt transformer secondary side winding；Regulating circuit, for adjusting the impedance of the shunt transformer secondary side winding；Current-limiting reactor, series connection access the shunt transformer secondary side winding or the series transformer secondary side winding；High-speed switch, it is in parallel with the current-limiting reactor, in response to the route short circuit current and disconnect.The application is constituted simply, compact-sized, can realize have conventional control Static Power Flow ability, be also equipped with transient process limiting short-circuit current advantage, improve security of system based on conventional tradition machinery formula phase shifter or controllable phase shifter.
Description
Technical field
This application involves the protections of electric system circuit, and in particular to a kind of short circuit current limited in circuit on power system
Phase shifter.
Background technique
With the gradually reinforcement of electric system rack, the single-machine capacity of generator in system, the individual capacity of transformer
It incrementally increases, the short circuit current in system is increasing, threatens electric power netting safe running.Meanwhile in order to enhance the safety of power grid
Property, the connection of current electric grid are gradually reinforced, this is also to lead to the increased one of the major reasons of short circuit current.Currently, domestic application
The maximum drop-out current of breaker be 63kA, in the excessive area of short circuit current, even difficulty occur the available feelings of suitable breaker
Condition, in addition, the electrical equipments such as transformer happen occasionally the case where being damaged because that cannot bear short circuit current.Therefore, it limits
The demand of system short-circuit electric current is more urgent.
Currently, the method for limitation system short-circuit electric current mainly includes following several.
Using high-impedance transformer and series transformer, this method technology maturation, but there is loss height, rate of qualified voltage
The problems such as low；
Using string apotype current limiting technique, this method will not have an impact voltage when operating normally, but that there are reliabilities is low,
The problems such as higher cost and Cooperation with Relay are difficult.
Change electric network composition and the method for operation, such as carries out layering and zoning, bus fanout operation, network solution inscription of loop, but
The above method reduces safety, the reliability of power grid to some extent.
Using saturation type superconductive current limiter, it is preferable to limit electric current effect, but there are higher costs, limit high current and make
With it is limited the problems such as, at present using less.
It is brilliant such as the series compensation device (TCSC) that thyristor controls using the short circuit current limiter based on FACTS technology
The phase shifter (TCPS) of brake tube control, THE UPFC (UPFC) etc..
Increasingly close with grid contact, the characteristics of NATURAL DISTRIBUTION is presented in trend in system, there are trends for some areas
Be unevenly distributed, channel block the problems such as.Effective means of the phase shifter as control Line Flow, has been obtained largely in foreign countries
Using, and based on mechanical phase shifter.The U.S. is in Minnesota-Ontario interconnection, WAPA Liberty substation
The research application for having carried out TCPS is mainly used for inhibiting system oscillation.
Summary of the invention
The embodiment of the present application provides a kind of phase shifter for limiting the short circuit current in circuit on power system, and feature exists
In the phase shifter includes regulating circuit, series transformer, shunt transformer, current-limiting reactor, high-speed switch, the series connection
Transformer series access in the route, and the series transformer includes series transformer first side winding and series transformer two
Secondary side winding；The shunt transformer connects the series transformer, and the shunt transformer includes shunt transformer primary side
Winding and shunt transformer secondary side winding；The regulating circuit is used to adjust the resistance of the shunt transformer secondary side winding
It is anti-；The current-limiting reactor series connection accesses the shunt transformer secondary side winding or the series transformer secondary side winding；
The high-speed switch is connected in parallel with the current-limiting reactor, is disconnected in response to the short circuit current in the route.
As one aspect of the present invention, the phase shifter further includes current transformer, controller, the current transformer
Series connection accesses the route, detects the current value of the route；The controller receives the electric current from the current transformer
Value, and in the case where the current value exceeds preset threshold value, it controls the high-speed switch and disconnects, to access the current limliting electricity
Anti- device.
Alternatively, the phase shifter further includes current transformer, master controller, current-limiting reactor control
Device processed, the current transformer series connection access the route, detect the current value of the route；The master controller is from the electricity
Current transformer receives the current value, and troubleshooting instruction is issued in the case where the current value exceeds preset threshold value；
The current-limiting reactor is instructed in response to the troubleshooting, is controlled the high-speed switch and is disconnected, to access the current-limiting reactor
Device.
As one aspect of the present invention, the current-limiting reactor includes inductance.
As one aspect of the present invention, the regulating circuit includes on-load voltage regulating switch or the electric power electricity based on thyristor
Sub switch；The high-speed switch includes the thyristor of fast breaker or reverse parallel connection or the crystalline substance of fast breaker and reverse parallel connection
The combination of brake tube.
Alternatively, the series transformer first side winding series connection accesses in the route, described
Series transformer secondary side winding is connected using triangle, the shunt transformer first side winding, the shunt transformer two
Secondary side winding is Y0 connection or Y connection.
Alternatively, the series transformer first side winding series connection accesses in the route, described
Series transformer secondary side winding uses Y connection, and the shunt transformer first side winding is connected using triangle, the parallel connection
Circuit Fault on Secondary Transformer winding uses Y connection.
Alternatively, the series transformer first side winding series connection accesses in the route, described
Series transformer secondary side winding uses Y0 connection, the shunt transformer first side winding, the shunt transformer secondary side
Winding is Y0 connection or Y connection.
Alternatively, the series transformer first side winding series connection accesses in the route, described
Series transformer first side winding includes the first series connection winding being connected in series and the second series connection winding, the shunt transformer one
The high-voltage end of secondary side winding connects the centre tap of the first series connection winding and the second series connection winding, the series-transformer
Device secondary side winding is connected using triangle, the shunt transformer first side winding, the shunt transformer secondary side winding
It is Y0 connection or Y connection.
Alternatively, the series transformer first side winding series connection accesses in the route, described
Series transformer first side winding includes the first series connection winding being connected in series and the second series connection winding, the shunt transformer one
The high-voltage end of secondary side winding connects the centre tap of the first series connection winding and the second series connection winding, the series-transformer
Device secondary side winding uses Y connection or Y0 connection, and the shunt transformer first side winding is connected using triangle, the parallel connection
Circuit Fault on Secondary Transformer winding uses Y0 connection or Y connection.
Embodiments herein proposes a kind of phase shifter with short circuit current limitation function, and equipment constitutes simple, structure
It is compact, it can realize having conventional control Static Power Flow based on conventional tradition machinery formula phase shifter or controllable phase shifter
Ability outside, the advantages of being also equipped with limiting short-circuit current in transient process, greatly improve security of system.
Detailed description of the invention
In order to more clearly explain the technical solutions in the embodiments of the present application, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, the drawings in the following description are only some examples of the present application, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is that a kind of current-limiting reactor based on on-load voltage regulating switch that one embodiment of the application provides concatenates parallel pressure change
The oblique phase shifter composition schematic diagram of device secondary side winding；
Fig. 2 is that a kind of current-limiting reactor based on electronic power switch that one embodiment of the application provides concatenates parallel pressure change
The oblique controllable phase shifter composition schematic diagram of device secondary side winding；
Fig. 3 is that a kind of current-limiting reactor based on on-load voltage regulating switch that one embodiment of the application provides concatenates parallel pressure change
The lateral phase shifter composition schematic diagram of device secondary side winding；
Fig. 4 is that a kind of current-limiting reactor based on electronic power switch that one embodiment of the application provides concatenates parallel pressure change
The lateral phase shifter composition schematic diagram of device secondary side winding；
Fig. 5 is that a kind of current-limiting reactor based on on-load voltage regulating switch that one embodiment of the application provides concatenates parallel pressure change
Longitudinal phase shifter composition schematic diagram of device secondary side winding；
Fig. 6 is that a kind of current-limiting reactor based on electronic power switch that one embodiment of the application provides concatenates parallel pressure change
Longitudinal phase shifter composition schematic diagram of device secondary side winding；
Fig. 7 is that a kind of current-limiting reactor based on on-load voltage regulating switch for providing of one embodiment of the application connects in series transformation
The oblique phase shifter composition schematic diagram of device secondary side winding；
Fig. 8 is that a kind of current-limiting reactor based on on-load voltage regulating switch for providing of one embodiment of the application connects in series transformation
The lateral phase shifter composition schematic diagram of device secondary side winding；
Fig. 9 is that a kind of current-limiting reactor based on on-load voltage regulating switch for providing of one embodiment of the application connects in series transformation
Longitudinal phase shifter composition schematic diagram of device secondary side winding；
Figure 10 is a kind of phase shifter line attachment equivalent circuit diagram that one embodiment of the application provides；
Figure 11 is a kind of oblique phase shifter operation principle schematic diagram that one embodiment of the application provides；
Figure 12 is a kind of lateral phase shifter operation principle schematic diagram that one embodiment of the application provides；
Figure 13 is a kind of longitudinal phase shifter operation principle schematic diagram that one embodiment of the application provides.
Specific embodiment
To keep the purposes, technical schemes and advantages of the embodiment of the present application clearer, below with reference to drawings and examples,
The specific embodiment progress of technical scheme in further detail, is clearly illustrated.However, specific implementations described below
Mode and embodiment are for illustrative purposes only, rather than the limitation to the application.It only contains the implementation of the application a part
Example, instead of all the embodiments, the other embodiments that those skilled in the art obtain the various change of the application all belong to
In the range of the application protection.
Phase shifter include series transformer (BT) 1, shunt transformer (ET) 2, regulating circuit 3, current-limiting reactor 4, quickly
Switch 5.
The series connection of series transformer 1 accesses in the route, and series transformer 1 includes series transformer first side winding and string
Join Circuit Fault on Secondary Transformer winding.Shunt transformer 2 connects series transformer 1, and shunt transformer 2 includes shunt transformer primary side
Winding and shunt transformer secondary side winding.Regulating circuit 3 is used to adjust the impedance of shunt transformer secondary side winding.Current limliting electricity
The anti-series connection of device 4 access shunt transformer secondary side winding or series transformer secondary side winding.High-speed switch 5 and current-limiting reactor
4 are connected in parallel, in response to route short circuit current and disconnect.
Under system normal operation, it is closed high-speed switch 5, current-limiting reactor 4 is bypassed.In route or near region route
When short trouble occurs, high-speed switch 5 is disconnected, current-limiting reactor 4 is connected and accesses shunt transformer secondary side winding or series connection
Circuit Fault on Secondary Transformer winding reduces short circuit current.Wherein, near region route refers to closing on the relation line of phase shifter installation site
Road.
Fig. 1 is that a kind of current-limiting reactor based on on-load voltage regulating switch that one embodiment of the application provides concatenates parallel pressure change
The oblique phase shifter composition schematic diagram of device secondary side winding.
As shown in Figure 1, series transformer first side winding includes in series transformer first side winding series connection line attachment
The the first series connection winding and the second series connection winding being connected in series, the first series connection of high-voltage end connection of shunt transformer first side winding
The centre tap of winding and the second series connection winding, series transformer secondary side winding are connected using triangle, shunt transformer one
Secondary side winding, shunt transformer secondary side winding are Y0 connection or Y connection.It is secondary that current-limiting reactor 4 accesses shunt transformer
Side winding, current-limiting reactor 4 include the combination of inductance or inductance and resistance, and in the present embodiment, current-limiting reactor 4 includes electricity
Sense.
Regulating circuit 3 includes but is not limited to on-load voltage regulating switch or the electronic power switch based on thyristor.Specifically, exist
In the present embodiment, regulating circuit 3 includes on-load voltage regulating switch.High-speed switch 5 includes the crystalline substance of fast breaker 51 and reverse parallel connection
The combination of thyristor switch 52,51 opening times of fast breaker < 5ms.Operate normally when, by closure fast breaker 51 or
Thyristor switch 52 bypasses current-limiting reactor 4.When short trouble, pass through the fast of thyristor switch 52 or fast breaker 51
Speed shutdown, puts into current-limiting reactor, correspondingly increases phase shifter equivalent impedance, limiting short-circuit current.
Fig. 2 is that a kind of current-limiting reactor based on electronic power switch that one embodiment of the application provides concatenates parallel pressure change
The oblique controllable phase shifter composition schematic diagram of device secondary side winding.
As shown in Fig. 2, series transformer first side winding includes in series transformer first side winding series connection line attachment
The the first series connection winding and the second series connection winding being connected in series, the first series connection of high-voltage end connection of shunt transformer first side winding
The centre tap of winding and the second series connection winding, series transformer secondary side winding are connected using triangle, shunt transformer one
Secondary side winding, shunt transformer secondary side winding are Y0 connection or Y connection.It is secondary that current-limiting reactor 4 accesses shunt transformer
Side winding.
In the present embodiment, phase shifter further includes current transformer 7, controller 6, the series connection line attachment of current transformer 7
Or near region route, detect the current value of route.Controller 6 receives the current value, determines that short circuit occurs for route based on the current value
When failure, control high-speed switch 5 is disconnected, to access current-limiting reactor 4.
In the present embodiment, regulating circuit 3 includes the electronic power switch based on thyristor.High-speed switch 5 includes quick
The combination of the thyristor switch 52 of breaker 51 and reverse parallel connection.When operating normally, pass through closure fast breaker 51 or crystalline substance
Thyristor switch 52 bypasses current-limiting reactor 4.When short trouble, pass through the quick of thyristor switch 52 or fast breaker 51
Shutdown puts into current-limiting reactor, correspondingly increases phase shifter equivalent impedance, limiting short-circuit current.
In the present embodiment, the controller that controller can use electric system is transformed, and reduces cost.It can also control
Device processed and power system controller are mutually indepedent, in short trouble, can be realized and quickly access current-limiting reactor, improve current limliting
Efficiency.
Fig. 3 is that a kind of current-limiting reactor based on on-load voltage regulating switch that one embodiment of the application provides concatenates parallel pressure change
The lateral phase shifter composition schematic diagram of device secondary side winding.
As shown in figure 3, series transformer secondary side winding uses in series transformer first side winding series connection line attachment
Triangle connection, shunt transformer first side winding, shunt transformer secondary side winding are Y0 connection or Y connection.Current limliting electricity
Anti- device 4 accesses shunt transformer secondary side winding.
In the present embodiment, phase shifter further includes current transformer 7, master controller 8, current-limiting reactor controller 9.Electric current
The series connection of mutual inductor 7 accesses the circuit on power system or near region route, detects the current value of route, and master controller 8 receives the electric current
Value when determining that short trouble occurs for route based on the current value, issues troubleshooting instruction to current-limiting reactor controller 9.Limit
It flows reactor controller 9 and receives troubleshooting instruction, control high-speed switch 5 disconnects, to access current-limiting reactor 4.
In the present embodiment, regulating circuit 3 includes on-load voltage regulating switch.High-speed switch 5 is including fast breaker and reversely
The combination of thyristor switch in parallel.When operating normally, by closure fast breaker 51 or thyristor switch 52, by current limliting
Reactor 4 bypasses.When short trouble, by rapidly switching off for thyristor switch 52 or fast breaker 51, current-limiting reactor is put into,
Correspondingly increase phase shifter equivalent impedance, limiting short-circuit current.
In the present embodiment, the system for having acquired line current in some master controllers 8, can directly be changed
It makes, realizes the communication of master controller 8 and current-limiting reactor controller 9, by master controller 8 under current-limiting reactor controller 9
Troubleshooting instruction is sent out, hardware modification is reduced.
Fig. 4 is that a kind of current-limiting reactor based on electronic power switch that one embodiment of the application provides concatenates parallel pressure change
The lateral phase shifter composition schematic diagram of device secondary side winding.
As shown in figure 4, series transformer secondary side winding uses in series transformer first side winding series connection line attachment
Triangle connection, shunt transformer first side winding, shunt transformer secondary side winding are Y0 connection or Y connection.Current limliting electricity
Anti- device 4 accesses shunt transformer secondary side winding.
In the present embodiment, regulating circuit 3 includes the electronic power switch based on thyristor.High-speed switch 5 includes quick
The combination of the thyristor switch 52 of breaker 51 and reverse parallel connection.When operating normally, pass through closure fast breaker 51 or crystalline substance
Thyristor switch 52 bypasses current-limiting reactor 4.When short trouble, pass through the quick of thyristor switch 52 or fast breaker 51
Shutdown puts into current-limiting reactor, correspondingly increases phase shifter equivalent impedance, limiting short-circuit current.
Fig. 5 is that a kind of current-limiting reactor based on on-load voltage regulating switch that one embodiment of the application provides concatenates parallel pressure change
Longitudinal phase shifter composition schematic diagram of device secondary side winding.
As shown in figure 5, series transformer secondary side winding uses in series transformer first side winding series connection line attachment
Y0 connection, shunt transformer first side winding, shunt transformer secondary side winding are Y0 connection or Y connection.Current-limiting reactor 4
Access shunt transformer secondary side winding.
In the present embodiment, regulating circuit 3 includes on-load voltage regulating switch.High-speed switch 5 is including fast breaker and reversely
The combination of thyristor switch in parallel.When operating normally, by closure fast breaker 51 or thyristor switch 52, by current limliting
Reactor 4 bypasses.When short trouble, by rapidly switching off for thyristor switch 52 or fast breaker 51, current-limiting reactor is put into,
Correspondingly increase phase shifter equivalent impedance, limiting short-circuit current.
Fig. 6 is that a kind of current-limiting reactor based on electronic power switch that one embodiment of the application provides concatenates parallel pressure change
Longitudinal phase shifter composition schematic diagram of device secondary side winding.
As shown in fig. 6, series transformer secondary side winding uses in series transformer first side winding series connection line attachment
Y0 connection, shunt transformer first side winding, shunt transformer secondary side winding are Y0 connection or Y connection.Current-limiting reactor 4
Access shunt transformer secondary side winding.
In the present embodiment, regulating circuit 3 includes the electronic power switch based on thyristor.High-speed switch 5 includes quick
The combination of the thyristor switch 52 of breaker 51 and reverse parallel connection.When operating normally, pass through closure fast breaker 51 or crystalline substance
Thyristor switch 52 bypasses current-limiting reactor 4.When short trouble, pass through the quick of thyristor switch 52 or fast breaker 51
Shutdown puts into current-limiting reactor, correspondingly increases phase shifter equivalent impedance, limiting short-circuit current.
Fig. 7 is that a kind of current-limiting reactor based on on-load voltage regulating switch for providing of one embodiment of the application connects in series transformation
The oblique phase shifter composition schematic diagram of device secondary side winding.
As shown in fig. 7, series transformer first side winding includes in series transformer first side winding series connection line attachment
The the first series connection winding and the second series connection winding being connected in series, the first series connection of high-voltage end connection of shunt transformer first side winding
The centre tap of winding and the second series connection winding, series transformer secondary side winding are connected using triangle, shunt transformer one
Secondary side winding, shunt transformer secondary side winding are Y0 connection or Y connection.It is secondary that current-limiting reactor 4 accesses series transformer
Side winding.
Regulating circuit 3 includes but is not limited to on-load voltage regulating switch or the electronic power switch based on thyristor.Specifically, exist
In the present embodiment, regulating circuit 3 includes on-load voltage regulating switch.High-speed switch 5 includes the crystalline substance of fast breaker 51 and reverse parallel connection
The combination of thyristor switch 52,51 opening times of fast breaker < 5ms.Operate normally when, by closure fast breaker 51 or
Thyristor switch 52 bypasses current-limiting reactor 4.When short trouble, pass through the fast of thyristor switch 52 or fast breaker 51
Speed shutdown, puts into current-limiting reactor, correspondingly increases phase shifter equivalent impedance, limiting short-circuit current.
Fig. 8 is that a kind of current-limiting reactor based on on-load voltage regulating switch for providing of one embodiment of the application connects in series transformation
The lateral phase shifter composition schematic diagram of device secondary side winding.
As shown in figure 8, series transformer secondary side winding uses in series transformer first side winding series connection line attachment
Triangle connection, shunt transformer first side winding, shunt transformer secondary side winding are Y0 connection or Y connection.Current limliting electricity
Anti- device 4 accesses series transformer secondary side winding.
In the present embodiment, regulating circuit 3 includes but is not limited to on-load voltage regulating switch or the power electronics based on thyristor
Switch.Specifically, in the present embodiment, regulating circuit 3 includes on-load voltage regulating switch.High-speed switch 5 includes fast breaker 51
With the combination of the thyristor switch 52 of reverse parallel connection.When operating normally, pass through closure fast breaker 51 or thyristor switch
52, current-limiting reactor 4 is bypassed.When short trouble, by rapidly switching off for thyristor switch 52 or fast breaker 51, put into
Current-limiting reactor correspondingly increases phase shifter equivalent impedance, limiting short-circuit current.
Fig. 9 is that a kind of current-limiting reactor based on on-load voltage regulating switch for providing of one embodiment of the application connects in series transformation
Longitudinal phase shifter composition schematic diagram of device secondary side winding；
As shown in figure 9, series transformer secondary side winding uses in series transformer first side winding series connection line attachment
Y0 connection, shunt transformer first side winding, shunt transformer secondary side winding are Y0 connection or Y connection.Current-limiting reactor 4
Access series transformer secondary side winding.
Regulating circuit 3 includes but is not limited to on-load voltage regulating switch or the electronic power switch based on thyristor.Specifically, exist
In the present embodiment, regulating circuit 3 includes on-load voltage regulating switch.High-speed switch 5 includes the brilliant lock of fast breaker and reverse parallel connection
The combination of pipe switch.When operating normally, through closure fast breaker 51 or thyristor switch 52, by current-limiting reactor 4
Road.When short trouble, by rapidly switching off for thyristor switch 52 or fast breaker 51, current-limiting reactor is put into, is correspondingly increased
Big phase shifter equivalent impedance, limiting short-circuit current.
Figure 10 is a kind of phase shifter line attachment equivalent circuit diagram that one embodiment of the application provides.The equivalent circuit diagram is suitable
For lateral, longitudinal, oblique phase shifter.As shown in Figure 10, line transmission active power expresses formula are as follows:
Wherein, Up、ULRespectively transmission line of electricity head end, terminal voltage, δ are transmission line of electricity head end, end before access phase shifter
Phase difference of voltage, XsFor transmission line of electricity equivalent impedance, ZeqFor phase shifter equivalent impedance, σ is phase shifter two sides phase difference of voltage.It can
Know, by adjusting phase shifter phase shift angle, it can be achieved that the adjustment of transmission line of electricity trend.By changing phase shifter equivalent impedance Zeq,
The short circuit current of system can be reduced.
As shown in Figure 10, phase shifter can be equivalent to the 1 ideal phase-shifting transformer and equivalent impedance phase with multiple turn ratio
Series connection, phase shifter equivalent impedance expression formula are as follows:
ZB1、ZB3Respectively series transformer primary side single hop winding, secondary side winding impedance, ZE1、ZTIt is respectively in parallel to become
Depressor first side winding, secondary side winding impedance, nB、nTRespectively series transformer, shunt transformer turn ratio, NB1、NB2、NB3
Respectively two sections of windings of series transformer primary side, secondary side winding the number of turns, NE1、N'TRespectively shunt transformer primary side, two
It is secondary to flank into umber of turn.
Figure 11 is a kind of oblique phase shifter operation principle schematic diagram that one embodiment of the application provides.As shown in figure 11, just
Under normal operating condition, the winding of shunt transformer secondary side winding is adjusted to adjust injecting voltage by on-load voltage regulating switch, is changed
Become the phase angle difference of phase shifter inputs, output end.
For phase shifter inputs voltage phasor,For phase shifter output end voltage phasor,For series transformer
The voltage phasor at midpoint and shunt transformer primary side junction.Become the voltage phase on primary side sectional wind for series connection
Amount, withAngle be not equal to 0 °, ± 90 °, ± 180 °.For phase shift angle.The relationship between variables are as follows:
When short trouble occurring in system, it is closed high-speed switch, quickly puts into current-limiting reactor, high-speed switch can be used instead
It is realized to parallel thyristors, fast breaker or both combination can also be used and realize.Within the breaker open operation time, increase phase shift
The equivalent impedance of device, the short circuit current that the installed route of limitation phase shifter and its near region route flow through, guarantee failure by it is quick, can
It is isolated by ground.
Figure 12 is a kind of lateral phase shifter operation principle schematic diagram that one embodiment of the application provides.
As shown in figure 12, it under normal operation, is mended by adjusting the number of turns of shunt transformer secondary side winding to adjust
Voltage is repaid, the phase angle difference of phase shifter inputs, output end is changed.
For phase shifter inputs voltage phasor,For phase shifter output end voltage phasor.Become one for series connection
Voltage phasor on secondary side winding, withAngle be ± 90 °,For phase shift angle.
Figure 13 is a kind of longitudinal phase shifter operation principle schematic diagram that one embodiment of the application provides.
As shown in figure 13, it under normal operation, is mended by adjusting the number of turns of shunt transformer secondary side winding to adjust
Voltage is repaid, phase shifter phase shifter output end voltage amplitude is changed.
For phase shifter inputs voltage phasor,For phase shifter output end voltage phasor.Become one for series connection
Voltage phasor on secondary side winding, withWith phase or reverse phase.K is adjustable proportion coefficient.
Oblique phase shifter only changes the phase of voltage, and longitudinal phase shifter only changes the size of voltage magnitude, lateral phase shift
Device not only changes voltage magnitude, but also can change voltage phase angle.Current-limiting reactor is mountable in series transformer secondary side or parallel connection
Circuit Fault on Secondary Transformer, difference essentially consist in the difference in size changed to phase shifter equivalent impedance.
It should be noted that each embodiment above by reference to described in attached drawing is only to illustrate the application rather than limits this
The range of application, those skilled in the art should understand that, it is right under the premise of not departing from spirit and scope
The modification or equivalent replacement that the application carries out, should all cover within the scope of the present application.In addition, signified unless the context
Outside, the word occurred in the singular includes plural form, and vice versa.In addition, unless stated otherwise, then any embodiment
All or part of in combination with any other embodiment all or part of come using.
Claims (10)
1. a kind of phase shifter of the short circuit current in limitation circuit on power system, which is characterized in that the phase shifter includes:
Series transformer, series connection access in the route, and the series transformer includes series transformer first side winding and string
Join Circuit Fault on Secondary Transformer winding；
Shunt transformer, connects the series transformer, and the shunt transformer includes shunt transformer first side winding and simultaneously
Join Circuit Fault on Secondary Transformer winding；
Regulating circuit, for adjusting the impedance of the shunt transformer secondary side winding；
Current-limiting reactor, series connection access the shunt transformer secondary side winding or the series transformer secondary side winding；
High-speed switch is connected in parallel with the current-limiting reactor, is disconnected in response to the short circuit current in the route.
2. phase shifter according to claim 1, which is characterized in that the phase shifter further include:
Current transformer, series connection access the route, detect the current value of the route；
Controller receives the current value from the current transformer, and the case where the current value exceeds preset threshold value
Under, it controls the high-speed switch and disconnects, to access the current-limiting reactor.
3. phase shifter according to claim 1, which is characterized in that the phase shifter further include:
Current transformer, series connection access the route, detect the current value of the route；
Master controller receives the current value from the current transformer, and exceeds the feelings of preset threshold value in the current value
Condition issues the process instruction that is out of order；
Current-limiting reactor controller is instructed in response to the troubleshooting, is controlled the high-speed switch and is disconnected, to access the limit
Flow reactor.
4. phase shifter according to claim 1, which is characterized in that the current-limiting reactor includes inductance.
5. phase shifter according to claim 1, which is characterized in that the regulating circuit includes on-load voltage regulating switch or is based on
The electronic power switch of thyristor；The high-speed switch includes the thyristor or fast breaker of fast breaker or reverse parallel connection
With the combination of the thyristor of reverse parallel connection.
6. phase shifter according to claim 1, which is characterized in that the series transformer first side winding series connection access institute
It states in route, the series transformer secondary side winding is connected using triangle, the shunt transformer first side winding, described
Shunt transformer secondary side winding is Y0 connection or Y connection.
7. phase shifter according to claim 1, which is characterized in that the series transformer first side winding series connection access institute
It states in route, the series transformer secondary side winding uses Y connection, and the shunt transformer first side winding uses triangle
Connection, the shunt transformer secondary side winding use Y connection.
8. phase shifter according to claim 1, which is characterized in that the series transformer first side winding series connection access institute
It states in route, the series transformer secondary side winding uses Y0 connection, the shunt transformer first side winding, the parallel connection
Circuit Fault on Secondary Transformer winding is Y0 connection or Y connection.
9. phase shifter according to claim 1, which is characterized in that the series transformer first side winding series connection access institute
It states in route, the series transformer first side winding includes the first series connection winding being connected in series and the second series connection winding, institute
The high-voltage end for stating shunt transformer first side winding connects the first series connection winding and the intermediate of the second series connection winding is taken out
Head, the series transformer secondary side winding are connected using triangle, the shunt transformer first side winding, the change in parallel
Depressor secondary side winding is Y0 connection or Y connection.
10. phase shifter according to claim 1, which is characterized in that the series transformer first side winding series connection access
In the route, the series transformer first side winding includes the first series connection winding and the second series connection winding of series connection,
The high-voltage end of the shunt transformer first side winding connects the centre of the first series connection winding and the second series connection winding
Tap, the series transformer secondary side winding use Y connection or Y0 connection, and the shunt transformer first side winding uses three
Angle connection, the shunt transformer secondary side winding use Y0 connection or Y connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910317654.XA CN110137983A (en) | 2019-04-19 | 2019-04-19 | A kind of phase shifter of short circuit current in limitation circuit on power system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910317654.XA CN110137983A (en) | 2019-04-19 | 2019-04-19 | A kind of phase shifter of short circuit current in limitation circuit on power system |
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| Publication Number | Publication Date |
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| CN110137983A true CN110137983A (en) | 2019-08-16 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910317654.XA Withdrawn CN110137983A (en) | 2019-04-19 | 2019-04-19 | A kind of phase shifter of short circuit current in limitation circuit on power system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111162538A (en) * | 2020-04-07 | 2020-05-15 | 江苏省电力试验研究院有限公司 | Controllable item shifter addressing method and system considering actual trend |
| CN111952970A (en) * | 2020-08-17 | 2020-11-17 | 云南电网有限责任公司电力科学研究院 | Power distribution network loop closing and power adjusting method and device |
| CN113096942A (en) * | 2021-05-14 | 2021-07-09 | 华北电力大学 | Thyristor control-based voltage regulation and phase-shift flexible regulation phase-shift transformer |
| CN114121449A (en) * | 2021-11-25 | 2022-03-01 | 云南电网有限责任公司电力科学研究院 | Phase-shifting transformer |
| WO2024051869A1 (en) * | 2022-09-08 | 2024-03-14 | 国网智能电网研究院有限公司 | Three-phase voltage impedance adjustable transformer and control method and control apparatus therefor, computer device, storage medium and computer program product |
-
2019
- 2019-04-19 CN CN201910317654.XA patent/CN110137983A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111162538A (en) * | 2020-04-07 | 2020-05-15 | 江苏省电力试验研究院有限公司 | Controllable item shifter addressing method and system considering actual trend |
| CN111952970A (en) * | 2020-08-17 | 2020-11-17 | 云南电网有限责任公司电力科学研究院 | Power distribution network loop closing and power adjusting method and device |
| CN111952970B (en) * | 2020-08-17 | 2024-03-19 | 云南电网有限责任公司电力科学研究院 | Method and device for closing loop and regulating electricity of power distribution network |
| CN113096942A (en) * | 2021-05-14 | 2021-07-09 | 华北电力大学 | Thyristor control-based voltage regulation and phase-shift flexible regulation phase-shift transformer |
| CN114121449A (en) * | 2021-11-25 | 2022-03-01 | 云南电网有限责任公司电力科学研究院 | Phase-shifting transformer |
| WO2024051869A1 (en) * | 2022-09-08 | 2024-03-14 | 国网智能电网研究院有限公司 | Three-phase voltage impedance adjustable transformer and control method and control apparatus therefor, computer device, storage medium and computer program product |
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Application publication date: 20190816 |