CN106208076A - Many feeder lines transmission system that a kind of active power is the most controlled - Google Patents
Many feeder lines transmission system that a kind of active power is the most controlled Download PDFInfo
- Publication number
- CN106208076A CN106208076A CN201610808223.XA CN201610808223A CN106208076A CN 106208076 A CN106208076 A CN 106208076A CN 201610808223 A CN201610808223 A CN 201610808223A CN 106208076 A CN106208076 A CN 106208076A
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- transmission
- controlled
- electricity
- transmission system
- power
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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)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses many feeder lines transmission system that a kind of active power is the most controlled, be connected with high voltage AC bus including primary, the public step-down transformer that is connected with low-voltage alternating-current bus of secondary, N road power controlled transmission of electricity subsystem and N road power uncontrollable transmission of electricity subsystem, every road power controlled transmission of electricity subsystem includes: AC is connected with high voltage AC bus, the commutator of the DC side parallel of DC side and inverter, wherein, it is additionally provided with resistor between the positive pole of the DC side of the positive pole of the DC side of commutator and inverter；The primary inverter being connected of AC and branch step-down transformer；The secondary branch's step-down transformer being connected with transmission line of electricity by branch's ac bus；Every road power uncontrollable transmission of electricity subsystem includes: the switch that the first end is connected with low-voltage alternating-current bus, the second end is connected with branch ac bus.Which kind of transmission of electricity subsystem is the present invention can select transmit electricity according to reality application needs, and the scope of application is big, and the reliability that improve transmission system is high.
Description
Technical field
The present invention relates to high voltage power transmission technical field, particularly relate to many feeder lines transmission of electricity that a kind of active power is the most controlled
System.
Background technology
In the tradition high pressure such as 110kV, 220kV, 500kV and ultrahigh-voltage alternating-current transmission system, transmission line of electricity open and
Excision is generally individually manipulated by AC circuit breaker, as it is shown in figure 1, the structure that Fig. 1 is a kind of transmission system of the prior art
Schematic diagram.The output of transmission line of electricity is distributed by natural trend, and is determined by line impedance, load parameter, passes through
Mechanical AC circuit breaker is difficult to control Transmission Lines power in real time.
It addition, also use alternating current-direct current to mix technology of transmission of electricity in modern power systems.The principle of this technology be first pass through whole
Alternating current is become unidirectional current by stream device, through hundreds of kilometer or the transmission of electricity of more long transmission line, then by inverter by unidirectional current
Become alternating current.Use one of sharpest edges that this kind of mode transmit electricity can control size and the side of through-put power exactly in real time
To.
But above two power transmission mode is single, and the scope of application is little, and when transmission system breaks down, this can be caused defeated
The paralysis of the load of electricity system power supply, reliability is low, and brings huge economic loss.
Therefore, how providing a kind of transmission system solving above-mentioned technical problem is that those skilled in the art are presently required solution
Problem certainly.
Summary of the invention
It is an object of the invention to provide many feeder lines transmission system that a kind of active power is the most controlled, on the one hand, can basis
Which kind of transmission of electricity subsystem actual application needs select transmit electricity, and the scope of application is big；On the other hand, improve transmission system
Reliability is high.
For solving above-mentioned technical problem, the invention provides many feeder lines transmission system that a kind of active power is the most controlled,
Be connected with high voltage AC bus including primary, the public step-down transformer that is connected with low-voltage alternating-current bus of secondary, also include N road merit
Rate controlled transmission of electricity subsystem and N road power uncontrollable transmission of electricity subsystem, N is integer, every road power controlled transmission of electricity subsystem bag
Include:
AC is connected with described high voltage AC bus, the commutator of the DC side parallel of DC side and inverter, wherein,
It is additionally provided with resistor between the positive pole of the positive pole of the DC side of described commutator and the DC side of described inverter；
The primary described inverter being connected of AC and branch step-down transformer；
The secondary described branch step-down transformer being connected with transmission line of electricity by branch's ac bus；
Every road power uncontrollable transmission of electricity subsystem includes:
The switch that first end is connected with described low-voltage alternating-current bus, the second end is connected with described branch ac bus.
Preferably, N is the integer not less than 2.
Preferably, described switch is automatically to switch.
Preferably, described switch is knife switch.
Preferably, described switch is chopper.
Preferably, described commutator is full-bridge rectifier.
Preferably, described commutator is IGBT commutator.
Preferably, described inverter is full-bridge inverter.
Preferably, described inverter is IGBT inverter.
The invention provides many feeder lines transmission system that a kind of active power is the most controlled, including primary female with high-voltage alternating
Line connects, the secondary public step-down transformer being connected with low-voltage alternating-current bus, also include N road power controlled transmission of electricity subsystem and
N road power uncontrollable transmission of electricity subsystem.Visible, the transmission system that the present invention provides not only includes power controlled transmission of electricity subsystem,
Also include power uncontrollable transmission of electricity subsystem, on the one hand, which kind of transmission of electricity subsystem can be selected to carry out according to reality application needs
Transmission of electricity, the scope of application is big；On the other hand, when power controlled transmission of electricity subsystem corresponding to a certain branch ac bus and power not
During any one system malfunctions in controlled transmission of electricity subsystem, all can carry out normal transmission by another system, also
Power controlled transmission of electricity subsystem and power uncontrollable transmission of electricity subsystem that the most each branch ac bus is corresponding realize the most superfluous
Remaining, the reliability that improve transmission system is high.
Accompanying drawing explanation
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, below will be to institute in prior art and embodiment
The accompanying drawing used is needed to be briefly described, it should be apparent that, the accompanying drawing in describing below is only some enforcements of the present invention
Example, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtains according to these accompanying drawings
Obtain other accompanying drawing.
Fig. 1 is the structural representation of a kind of transmission system of the prior art；
The structural representation of many feeder lines transmission system that a kind of active power that Fig. 2 provides for the present invention is the most controlled；
The structural representation of a kind of N road power controlled transmission of electricity subsystem that Fig. 3 provides for the present invention.
Detailed description of the invention
The core of the present invention is to provide many feeder lines transmission system that a kind of active power is the most controlled, on the one hand, can basis
Which kind of transmission of electricity subsystem actual application needs select transmit electricity, and the scope of application is big；On the other hand, improve transmission system
Reliability is high.
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
The a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under not making creative work premise, broadly falls into the scope of protection of the invention.
Refer to the structure of the most controlled many feeder lines transmission system of a kind of active power that Fig. 2, Fig. 2 provide for the present invention
Schematic diagram, this transmission system includes:
Primary is connected with high voltage AC bus 1, the secondary public step-down transformer 2 being connected with low-voltage alternating-current bus 3, also wraps
Including N road power controlled transmission of electricity subsystem 4 and N road power uncontrollable transmission of electricity subsystem 5, N is integer, the controlled transmission of electricity of power of every road
Subsystem 4 includes:
As preferably, N is the integer not less than 2.
Specifically, high voltage AC bus 1 (alternatively referred to as capable AC bus) here provides electricity for whole transmission system
Source, for improving the security performance of transmission system and reducing the power attenuation of course of conveying, the transmission system in the application uses
Low voltage power transmission, for realizing low voltage power transmission, the application uses public step-down transformer 2, and public step-down transformer 2 is for handing over high pressure
The high-tension current of stream bus 1 is converted to low-tension current, and low-tension current is re-used as the input of N road power uncontrollable transmission of electricity subsystem 5
Power supply.
It is understood that the concrete value of N here is determined according to practical situation, the present invention does not do particularly limit at this
Fixed.
It addition, at mains side only with a public step-down transformer 2 in the application, with converter power transformer in prior art
Compared with transmission line of electricity 6 scheme one to one, it is possible to save N-1 converter power transformer, can significantly subtract the most economically
Little fund input, low cost.
AC is connected with high voltage AC bus 1, the commutator 41 of the DC side parallel of DC side and inverter 42, its
In, it is additionally provided with resistor 43 between the positive pole of the positive pole of the DC side of commutator 41 and the DC side of inverter 42；
The primary inverter 42 being connected of AC and branch step-down transformer 44；
As preferably, commutator 41 is full-bridge rectifier.
As preferably, commutator 41 is IGBT commutator.
As preferably, inverter 42 is full-bridge inverter.
As preferably, inverter 42 is IGBT inverter.
Certainly, the commutator 41 in the application and inverter 42 can also select other kinds of commutator and inversion respectively
Device, the present invention the most particularly limits at this, and this realizes the purpose of the present invention.
Specifically, refer to the structural representation of a kind of N road power controlled transmission of electricity subsystem that Fig. 3, Fig. 3 provide for the present invention
Figure.
In power controlled transmission of electricity subsystem 4, the voltage of commutator 41 DC side is:
Edr=K0(Ercosα-Xr)-RrId
The voltage of inverter 42 DC side is:
Edi=K0(Eicosβ+Xi+XL)+(Ri+RL)Id
The electric current of DC side is:
Wherein, K0For the coefficient determined by the mode of connection of commutating circuit, RrFor direct current flat ripple reactance and converter power transformer with
And the resistance of the loss correspondence of commutator 41, RiFor the resistance that the loss of inverter 42 is corresponding, R is the resistance of resistor 43, IdFor
DC current, EdrFor commutator 41 DC side DC voltage, EdiFor inverter 42 DC side DC voltage, ErStraight for commutator 41
The alternating voltage root-mean-square valve of stream side, EiFor the alternating voltage root-mean-square valve of inverter 42 DC side, XrCommutation for commutator 41
Reactance, XiFor the commutating reactance of inverter 42, α is the Trigger Angle of commutator 41, and β is the Trigger Angle of inverter 42, RLFor power transmission line
The resistance on road 6, XLReactance for transmission line of electricity 6.
For each transmission line of electricity 6 in power plant or transformer station, by many feedbacks that equipment active power is the most controlled
Line transmission system, it is achieved power controlled transmission of electricity subsystem 4 and the exchange of power uncontrollable transmission of electricity subsystem 5 run, the most standby.
Power controlled transmission of electricity subsystem 4 through " commutation inversion " process, utilizes direct current transportation principle to realize right in the shortest distance
The manual control of output, namely by determine electric current, determine voltage, determine power control mode realize transmission line of electricity 6 is transmitted merit
The artificial adjustment of rate, it is achieved the power flowcontrol of AC transmission system.
The secondary branch's step-down transformer 44 being connected with transmission line of electricity 6 by branch's ac bus；
Every road power uncontrollable transmission of electricity subsystem 5 includes:
The switch that first end is connected with low-voltage alternating-current bus 3, the second end is connected with branch ac bus.
As preferably, switch as switch automatically.
As preferably, switch as knife switch.
As preferably, switch as chopper.
Specifically, when switch is for chopper, now chopper also includes the disconnecting switch of necessity.
Certainly, switch here can also be other kinds of switch, and the present invention is not particularly limited at this, according to reality
Border situation is determined.
To sum up, the transmission system that the present invention provides includes that power controlled transmission of electricity subsystem 4 and N road power in N road is uncontrollable
Transmission of electricity subsystem 5, by the isolated operation of power uncontrollable transmission of electricity subsystem 5, electric energy will be transmitted by traditional natural trend,
Active power distribution is determined by line impedance and load parameter completely；By power controlled transmission of electricity subsystem 4 isolated operation, profit
By " commutation inversion " process in direct current transportation principle, active power is controlled in real time, can realize transmission line of electricity 6 is had
The purpose that merit power controls；
It addition, the power of every transmission line of electricity 6 controlled transmission of electricity subsystem 4 and power uncontrollable transmission of electricity subsystem 5
Individually to run, reliability is high, and can not at power controlled transmission of electricity subsystem 4 or the power of certain transmission line of electricity 6
In the case of control transmission of electricity subsystem 5 breaks down, do not interfere with the operation of other transmission lines of electricity 6 and the real-time of output yet
Regulation and control, reliability is high.
The invention provides many feeder lines transmission system that a kind of active power is the most controlled, including primary female with high-voltage alternating
Line connects, the secondary public step-down transformer being connected with low-voltage alternating-current bus, also include N road power controlled transmission of electricity subsystem and
N road power uncontrollable transmission of electricity subsystem.Visible, the transmission system that the present invention provides not only includes power controlled transmission of electricity subsystem,
Also include power uncontrollable transmission of electricity subsystem, on the one hand, which kind of transmission of electricity subsystem can be selected to carry out according to reality application needs
Transmission of electricity, can carry out the transmission of electricity that power is controlled, also can carry out the uncontrollable transmission of electricity of power, and the scope of application is big；On the other hand, when certain
Any one in power controlled transmission of electricity subsystem that one branch's ac bus is corresponding and power uncontrollable transmission of electricity subsystem is
When system breaks down, all can carry out normal transmission, namely the power that each branch ac bus is corresponding by another system
Controlled transmission of electricity subsystem and power uncontrollable transmission of electricity subsystem realize being mutually redundant, and the reliability that improve transmission system is high.
It should be noted that in this manual, term " includes ", " comprising " or its any other variant are intended to
Comprising of nonexcludability, so that include that the process of a series of key element, method, article or equipment not only include that those are wanted
Element, but also include other key elements being not expressly set out, or also include for this process, method, article or equipment
Intrinsic key element.In the case of there is no more restriction, statement " including ... " key element limited, it is not excluded that
Including process, method, article or the equipment of described key element there is also other identical element.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.
Multiple amendment to these embodiments will be apparent from for those skilled in the art, as defined herein
General Principle can realize without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein and features of novelty phase one
The widest scope caused.
Claims (9)
1. many feeder lines that active power is the most controlled transmission system, it is characterised in that include primary and high voltage AC bus
Connection, the secondary public step-down transformer being connected with low-voltage alternating-current bus, also include N road power controlled transmission of electricity subsystem and N
Road power uncontrollable transmission of electricity subsystem, N is integer, and power controlled transmission of electricity subsystem in every road includes:
AC is connected with described high voltage AC bus, the commutator of the DC side parallel of DC side and inverter, wherein, described
It is additionally provided with resistor between the positive pole of the positive pole of the DC side of commutator and the DC side of described inverter；
The primary described inverter being connected of AC and branch step-down transformer；
The secondary described branch step-down transformer being connected with transmission line of electricity by branch's ac bus；
Every road power uncontrollable transmission of electricity subsystem includes:
The switch that first end is connected with described low-voltage alternating-current bus, the second end is connected with described branch ac bus.
2. many feeder lines transmission system that active power as claimed in claim 1 is the most controlled, it is characterised in that N is not less than 2
Integer.
3. many feeder lines transmission system that active power as claimed in claim 1 is the most controlled, it is characterised in that described switch is
Automatically switch.
4. many feeder lines transmission system that active power as claimed in claim 1 is the most controlled, it is characterised in that described switch is
Knife switch.
5. many feeder lines transmission system that active power as claimed in claim 1 is the most controlled, it is characterised in that described switch is
Chopper.
6. many feeder lines transmission system that active power as claimed in claim 1 is the most controlled, it is characterised in that described commutator
For full-bridge rectifier.
7. many feeder lines transmission system that active power as claimed in claim 6 is the most controlled, it is characterised in that described commutator
For IGBT commutator.
8. many feeder lines transmission system that active power as claimed in claim 1 is the most controlled, it is characterised in that described inverter
For full-bridge inverter.
9. many feeder lines transmission system that active power as claimed in claim 8 is the most controlled, it is characterised in that described inverter
For IGBT inverter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610808223.XA CN106208076A (en) | 2016-09-07 | 2016-09-07 | Many feeder lines transmission system that a kind of active power is the most controlled |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610808223.XA CN106208076A (en) | 2016-09-07 | 2016-09-07 | Many feeder lines transmission system that a kind of active power is the most controlled |
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| CN106208076A true CN106208076A (en) | 2016-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610808223.XA Pending CN106208076A (en) | 2016-09-07 | 2016-09-07 | Many feeder lines transmission system that a kind of active power is the most controlled |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107317329A (en) * | 2017-07-14 | 2017-11-03 | 广东工业大学 | A kind of three-winding rectifier transformer and the individually controllable transmission system of power altogether |
| CN109378867A (en) * | 2018-11-08 | 2019-02-22 | 清华大学 | A kind of mixing double feed-in d. c. power transmission system maximum transmission power control method |
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| CN202840533U (en) * | 2012-10-31 | 2013-03-27 | 深圳供电局有限公司 | Flexible direct current closed loop type power distribution network system converter station with bypass direct current buses |
| US20130197704A1 (en) * | 2012-02-01 | 2013-08-01 | Abb Research Ltd | Dc connection scheme for windfarm with internal mvdc collection grid |
| CN205489555U (en) * | 2016-03-01 | 2016-08-17 | 南方电网科学研究院有限责任公司 | Direct current power transmission system |
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2016
- 2016-09-07 CN CN201610808223.XA patent/CN106208076A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130197704A1 (en) * | 2012-02-01 | 2013-08-01 | Abb Research Ltd | Dc connection scheme for windfarm with internal mvdc collection grid |
| CN102938564A (en) * | 2012-10-31 | 2013-02-20 | 深圳供电局有限公司 | Closed-loop power distribution network system based on flexible direct current |
| CN202840533U (en) * | 2012-10-31 | 2013-03-27 | 深圳供电局有限公司 | Flexible direct current closed loop type power distribution network system converter station with bypass direct current buses |
| CN205489555U (en) * | 2016-03-01 | 2016-08-17 | 南方电网科学研究院有限责任公司 | Direct current power transmission system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107317329A (en) * | 2017-07-14 | 2017-11-03 | 广东工业大学 | A kind of three-winding rectifier transformer and the individually controllable transmission system of power altogether |
| CN109378867A (en) * | 2018-11-08 | 2019-02-22 | 清华大学 | A kind of mixing double feed-in d. c. power transmission system maximum transmission power control method |
| CN109378867B (en) * | 2018-11-08 | 2022-05-06 | 清华大学 | Maximum transmission power control method for hybrid double-feed-in direct current transmission system |
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Application publication date: 20161207 |
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