CN106208081A - A kind of power regulation transmission system of band branch resistance - Google Patents
A kind of power regulation transmission system of band branch resistance Download PDFInfo
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- CN106208081A CN106208081A CN201610808356.7A CN201610808356A CN106208081A CN 106208081 A CN106208081 A CN 106208081A CN 201610808356 A CN201610808356 A CN 201610808356A CN 106208081 A CN106208081 A CN 106208081A
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- power
- transmission system
- branch resistance
- inverter
- commutator
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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
- H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
- H02J3/06—Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
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- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses the power regulation transmission system of a kind of band branch resistance, including: AC power controllable and AC power natural contral unit.AC power natural contral unit, including the first step-down transformer and switch.AC power controllable includes commutator and inversion branch units, and inversion branch units includes branch resistance, inverter and the second step-down transformer.Native system is by being carried in the AC power controllable of band D.C. resistance and branch resistance between high voltage bus and transmission line of electricity, and the natural trend utilizing AC power controllable and AC power natural contral unit to realize electric energy carries the most standby with active power regulation.When AC power natural contral unit individually controls, transmission line of electricity, according to the size output of circuit and load impedance, forms natural power；When AC power controllable individually controls, employing is determined electric current, is determined voltage and the method determining power, can control the size of transmission line of electricity output, forms controlled power.
Description
Technical field
The present invention relates to technical field of electric power, particularly relate to the power regulation transmission system of a kind of band branch resistance.
Background technology
In the high pressure such as tradition 110kV, 220kV, 500kV and ultrahigh-voltage alternating-current transmission system, transmission line of electricity is opened and is cut
Except generally individually being manipulated by AC circuit breaker 100, as shown in Figure 1.Transmission line of electricity output is distributed by natural trend,
And determined by line impedance, load parameter.It is difficult to Transmission Lines power is entered by mechanical AC circuit breaker 100
Row controls in real time.
In modern power systems, use alternating current-direct current mixing technology of transmission of electricity.Direct current transportation principle is to first pass through fairing
Alternating current is become unidirectional current, through hundreds of kilometer or the transmission of electricity of more long transmission line, then becomes handing over by unidirectional current by inverter
Stream electricity.Although which solves the shortcoming of tradition transmission system, but may need in one case in actual applications
The transmission system that power is controlled, but it is controlled to need not power in another case, i.e. power natural contral, it can be seen that,
The transmission system function singleness of which, and when any one hardware device in transmission system damages, cause whole defeated
Electricity system occurs therefore often, reliability is relatively low.
As can be seen here, the shortcoming how improving transmission system function singleness and the reliability improving transmission system are abilities
Field technique personnel's problem demanding prompt solution.
Summary of the invention
It is an object of the invention to provide the power regulation transmission system of a kind of band branch resistance, be used for improving transmission system merit
Can single shortcoming and the reliability of raising transmission system.
For solving above-mentioned technical problem, the present invention provides the power regulation transmission system of a kind of band branch resistance, including: hand over
Stream power controllable and AC power natural contral unit；Described AC power natural contral unit, including being arranged at high pressure
The first step-down transformer between bus and low-voltage bus bar, is arranged at the switch between described low-voltage bus bar and line side bus；
Described AC power controllable includes that commutator and inversion branch units, described inversion branch units include branch resistance, inverse
Becoming device and the second step-down transformer, the first end of described commutator is connected with described high voltage bus, the second end of described commutator
It is connected with described dc bus, the 3rd end of described commutator and the three-terminal link of described inverter, described branch resistance
First end is connected with described dc bus, and the second end of described branch resistance is connected with the first end of described inverter, described inverse
The second end becoming device is connected with the first end of described second step-down transformer, and the second end of described second step-down transformer is with described
Line side bus connects；
Wherein, described line side bus is connected with transmission line of electricity.
Preferably, when the number of described transmission line of electricity is more than 1, the inversion branch in described AC power controllable is single
Number and the number of described switch of unit are identical with the number of described transmission line of electricity, and the quantity of described commutator and described the
The quantity of one step-down transformer is 1.
Preferably, described commutator is full-bridge rectifier.
Preferably, described commutator is silicon controlled rectifier.
Preferably, described inverter is full-bridge inverter.
Preferably, described inverter is sinewave inverter.
Preferably, described switch is knife switch.
Preferably, described switch is automatically to switch.
Preferably, described switch is AC circuit breaker.
The power regulation transmission system of band branch resistance provided by the present invention, by by band D.C. resistance and branch resistance
AC power controllable be carried between high voltage bus and transmission line of electricity, utilize AC power controllable and AC power
The natural trend conveying that natural contral unit realizes electric energy is the most standby with active power regulation.When AC power natural contral list
When unit's isolated operation and control, transmission line of electricity, according to the size output of circuit and load impedance, forms natural power；Work as friendship
During stream power controllable isolated operation, employing is determined electric current, is determined voltage and determine the control method of power, can control transmission line of electricity
The size of output, forms controlled power.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention, the accompanying drawing used required in embodiment will be done simply below
Introduce, it should be apparent that, the accompanying drawing in describing below is only some embodiments of the present invention, for ordinary skill people
From the point of view of Yuan, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structure chart of transmission of electricity regulator control system of the prior art；
The structure chart of the power regulation transmission system of a kind of band branch resistance that Fig. 2 embodiment of the present invention provides；
Fig. 3 is equivalent circuit diagram corresponding to a kind of AC power controllable that the present invention provides；
Reference is as follows:
AC circuit breaker 100, AC power controllable 200, AC power natural contral unit 300, high voltage bus 9,
Low-voltage bus bar 1, the first step-down transformer 2, line side bus 8, switch 7, commutator 3, branch resistance 4, inverter 5, second drops
Pressure transformer 6, dc bus 11.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiment wholely.Based on this
Embodiment in invention, those of ordinary skill in the art are not under making creative work premise, and obtained is every other
Embodiment, broadly falls into scope.
The core of the present invention is to provide the power regulation transmission system of a kind of band branch resistance.
In order to make those skilled in the art be more fully understood that the present invention program, below in conjunction with the accompanying drawings and detailed description of the invention
The present invention is described in further detail.
The structure chart of the power regulation transmission system of a kind of band branch resistance that Fig. 2 embodiment of the present invention provides.Such as Fig. 2 institute
Showing, the power regulation transmission system of band branch resistance includes: AC power controllable 200 and AC power natural contral unit
300；AC power natural contral unit 300, including the first downconverter being arranged between high voltage bus 9 and low-voltage bus bar 1
Device 2, the switch 7 being arranged between low-voltage bus bar 2 and line side bus 8；AC power controllable 200 includes commutator 3 He
Inversion branch units, inversion branch units includes branch resistance 4, inverter 5 and the second step-down transformer 6, the first of commutator 3
End is connected with high voltage bus 9, and the second end of commutator 3 is connected with dc bus 11, the 3rd end of commutator 3 and inverter 5
Three-terminal link, the first end of branch resistance 4 is connected with dc bus 11, the second end of branch resistance 4 and the first of inverter 5
End connects, and the second end of inverter 5 connects with the first end of the second step-down transformer 6, the second end of the second step-down transformer 6 and
Line side bus 8 connects；
Wherein, line side bus 8 is connected with transmission line of electricity 10.
It should be noted that AC power in AC power controllable 200 controlled refer to can control exchange
The meaning of power output, the AC power natural contral in AC power natural contral unit 300 refers to cannot control to hand over
The meaning of stream power output.AC power controllable 200 and AC power natural contral unit 300 in the present invention are one
Plant title, in order to distinguish, there is no other restriction implication.It addition, Fig. 2 depicts multiple inversion branch units, multiple
Inversion branch units is all connected with a commutator 3, it is to be understood that the commutator 3 in Fig. 2 can also be multiple.In order to
Illustrating clear, the dotted line frame in Fig. 2 is simply labelled with one of them AC power controllable 200 and an AC power is natural
Control unit 300, remaining does not mark.
In order to allow those skilled in the art more understand how the regulator control system in the present invention regulates and controls, friendship given below
The calculating process of the electrical energy parameter in the low-voltage electricity transmission line of stream power controllable 200 correspondence.
AC power controllable 200 in Fig. 2 is carried out simplification and obtains Fig. 3.A kind of exchange that Fig. 3 provides for the present invention
The equivalent circuit diagram that power controllable is corresponding.
In the direct current component that Fig. 3 simplifies, commutator 3, inverter 5 DC side DC voltage and DC current are respectively
For:
Edr=K0(Ercosα-Xr)-RrId (1)
Edi=K0(Eicosβ+Xi+XL)+(Ri+RL)Id (2)
Wherein, K0For the coefficient determined by the mode of connection of commutating circuit, Rr、RiIt is respectively commutator 3, the damage of inverter 5
The resistance that consumption is corresponding, R is the resistance of branch's D.C. resistance 4, IDFor DC current, Edr、EdiIt is respectively commutator 3, inverter 5 straight
Stream side DC voltage, Er、EiIt is respectively commutator 3, the alternating voltage root-mean-square valve of inverter 5 AC, Xr、XiThe most whole
Stream device 3, the commutating reactance of inverter 5, α, β are respectively commutator 3, the Trigger Angle of inverter 5, RiAnd RLIt is respectively transmission line of electricity
The resistance of 10 and reactance.
Each transmission line of electricity 10 is adjusted by a plurality of low-voltage circuit active power of equipment band D.C. resistance and branch resistance
Ore-controlling Role is adjusted, it is possible to achieve AC power controllable 200 and the exchange of AC power natural contral unit 300 run,
The most standby.Direct current component through " commutation inversion " process, utilizes direct current transportation principle to realize right in the shortest distance
The manual control of 380V low-voltage electricity transmission line output, it is achieved the real-time control of AC transmission system active power.
Every transmission line of electricity 10 runs D.C. resistance total for impact under AC power controllable 200 controls, and then
Affect total DC current of commutator 3 output, the final DC current i.e. power affecting every transmission line of electricity 10.It is to say,
It is interactional that each transmission line of electricity 10 runs under AC power controllable 200 controls, it is necessary to coordinate control,
Realize stable power output.
When transmission line of electricity 10 runs under the control of AC power natural contral unit 300, the most directly obtain low pressure female
The electric energy of line 1, it is impossible to carry out power control.
The power regulation transmission system of the band branch resistance that the present embodiment provides, by by band D.C. resistance and branch resistance
AC power controllable be carried between high voltage bus and transmission line of electricity, utilize AC power controllable and AC power
The natural trend conveying that natural contral unit realizes electric energy is the most standby with active power regulation.When AC power natural contral list
When unit's isolated operation and control, transmission line of electricity, according to the size output of circuit and load impedance, forms natural power；Work as friendship
During stream power controllable isolated operation, employing is determined electric current, is determined voltage and determine the control method of power, can control transmission line of electricity
The size of output, forms controlled power.
It is understood that Fig. 2 is a kind of concrete application scenarios, AC power controllable 200 and AC power
The determination of the number of natural contral unit 300 needs to select according to practical situation.
As preferred embodiment, when the number of transmission line of electricity 10 is more than 1, in AC power controllable 200
The number of inversion branch units and the number of switch 7 are identical with the number of transmission line of electricity 10, and the quantity of commutator 3 and first
The quantity of step-down transformer 2 is 1.
It is understood that in the above case said, the quantity of commutator 3 is it can also be provided that multiple so that transmission line of electricity
10 one_to_one corresponding, but, it is contemplated that the problems such as power consumption, commutator here 3 selects one.
As preferred embodiment, commutator 3 is full-bridge rectifier.It is understood that commutator 3 can be multiple
Type such as, in addition to the full-bridge rectifier in bridge rectifier, it is also possible to be half bridge rectifier.
As preferred embodiment, commutator 3 is silicon controlled rectifier.It is understood that commutator 3 can be many
Type such as, in addition to silicon controlled rectifier, it is also possible to be diode rectifier.It is contemplated that practical application, this
Invention uses silicon controlled rectifier.
As preferred embodiment, inverter is full-bridge inverter.It is understood that inverter 5 is except being full-bridge
Half-bridge inverter, merely just a kind of specific embodiment is can also is that outside inverter.
As preferred embodiment, inverter 5 is sinewave inverter.The output signal of sinewave inverter can be straight
Connect the wireless conversion of use.
As preferred embodiment, switch 7 is knife switch.
As preferred embodiment, switch 7 is automatically to switch.Automatically switch can also infrequently switch on and off electricity
Road and control motor across-the-line starting.Therefore, switch is the disconnected conjunction electrical equipment with link of protection that low-voltage circuit is conventional automatically.
As preferred embodiment, switch 7 is AC circuit breaker.
It is understood that the effect of switch 7 is the break-make realizing the signal of telecommunication, therefore, the form of switch 7 has a variety of,
It is not limited to above-mentioned implementation.
Above the power regulation transmission system of band branch resistance provided by the present invention is described in detail.Description
In each embodiment use the mode gone forward one by one to describe, what each embodiment stressed is different from other embodiments it
Place, between each embodiment, identical similar portion sees mutually.For device disclosed in embodiment, owing to it is with real
Executing method disclosed in example corresponding, so describe is fairly simple, relevant part sees method part and illustrates.Should refer to
Go out, for those skilled in the art, under the premise without departing from the principles of the invention, it is also possible to the present invention
Carrying out some improvement and modification, these improve and modify in the protection domain also falling into the claims in the present invention.
Professional further appreciates that, in conjunction with the unit of each example that the embodiments described herein describes
And algorithm steps, it is possible to electronic hardware, computer software or the two be implemented in combination in, in order to clearly demonstrate hardware and
The interchangeability of software, the most generally describes composition and the step of each example according to function.These
Function performs with hardware or software mode actually, depends on application-specific and the design constraint of technical scheme.Specialty
Technical staff specifically should can be used for using different methods to realize described function to each, but this realization should not
Think beyond the scope of this invention.
The method described in conjunction with the embodiments described herein or the step of algorithm can direct hardware, processor be held
The software module of row, or the combination of the two implements.Software module can be placed in random access memory (RAM), internal memory, read-only deposit
Reservoir (ROM), electrically programmable ROM, electrically erasable ROM, depositor, hard disk, moveable magnetic disc, CD-ROM or technology
In any other form of storage medium well known in field.
Claims (9)
1. the power regulation transmission system of a band branch resistance, it is characterised in that including: AC power controllable with exchange
Power natural contral unit；Described AC power natural contral unit, including being arranged between high voltage bus and low-voltage bus bar
First step-down transformer, is arranged at the switch between described low-voltage bus bar and line side bus；Described AC power controllable
Including commutator and inversion branch units, described inversion branch units includes branch resistance, inverter and the second step-down transformer,
First end of described commutator is connected with described high voltage bus, and the second end of described commutator is connected with described dc bus, institute
Stating the 3rd end of commutator and the three-terminal link of described inverter, the first end of described branch resistance is with described dc bus even
Connecing, the second end of described branch resistance is connected with the first end of described inverter, the second end of described inverter and described second
First end of step-down transformer connects, and the second end of described second step-down transformer is connected with described line side bus；
Wherein, described line side bus is connected with transmission line of electricity.
The power regulation transmission system of band branch resistance the most according to claim 1, it is characterised in that when described power transmission line
When the number on road is more than 1, the number of the inversion branch units in described AC power controllable and the number of described switch
Identical with the number of described transmission line of electricity, and the quantity of the quantity of described commutator and described first step-down transformer is 1.
The power regulation transmission system of band branch resistance the most according to claim 1, it is characterised in that described commutator is
Full-bridge rectifier.
The power regulation transmission system of band branch resistance the most according to claim 1, it is characterised in that described commutator is
Silicon controlled rectifier.
The power regulation transmission system of band branch resistance the most according to claim 1, it is characterised in that described inverter is
Full-bridge inverter.
The power regulation transmission system of band branch resistance the most according to claim 1, it is characterised in that described inverter is
Sinewave inverter.
The power regulation transmission system of band branch resistance the most according to claim 1, it is characterised in that described switch is lock
Knife-like switch.
The power regulation transmission system of band branch resistance the most according to claim 1, it is characterised in that described switch is certainly
Dynamic switch.
The power regulation transmission system of band branch resistance the most according to claim 1, it is characterised in that described switch is for handing over
Stream chopper.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610808356.7A CN106208081A (en) | 2016-09-07 | 2016-09-07 | A kind of power regulation transmission system of band branch resistance |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610808356.7A CN106208081A (en) | 2016-09-07 | 2016-09-07 | A kind of power regulation transmission system of band branch resistance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107181285A (en) * | 2017-07-14 | 2017-09-19 | 广东工业大学 | A kind of a plurality of low-voltage circuit active power regulator control system with branch resistance |
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| US20130197704A1 (en) * | 2012-02-01 | 2013-08-01 | Abb Research Ltd | Dc connection scheme for windfarm with internal mvdc collection grid |
| CN102761123A (en) * | 2012-07-11 | 2012-10-31 | 浙江大学 | Multi-infeed HVDC (high-voltage direct current) system partitioning method based on mounting of fault current limiters |
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