CN107947218A - A kind of Multi-end flexible direct current transmission system power distribution method based on V I curves - Google Patents
A kind of Multi-end flexible direct current transmission system power distribution method based on V I curves Download PDFInfo
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- CN107947218A CN107947218A CN201711236239.9A CN201711236239A CN107947218A CN 107947218 A CN107947218 A CN 107947218A CN 201711236239 A CN201711236239 A CN 201711236239A CN 107947218 A CN107947218 A CN 107947218A
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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
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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Abstract
A kind of Multi-end flexible direct current transmission system power distribution method based on V I curves, when voltage deviation rate is less than or equal to 5%, the sagging coefficient of variable slope current conversion station is infinity, and output current is kept constant, and is not involved in power adjusting, system rejection to disturbance ability is strong；At this time, it is 2 to determine the sagging coefficient of slope current conversion station, determines slope current conversion station output current and changes smaller, the imbalance power in effective, the quick distribution system of energy.When voltage deviation rate is more than 5%, determines slope current conversion station and power distribution is carried out with 0.83 sagging coefficient；Variable slope current conversion station carries out power distribution with the V I curves set, and current conversion station participates in the number adjusted and the imbalance power of depth and system is positively correlated.Strong to the imbalance power regulating power of system, suitable for the big Multi-end flexible direct current transmission system of imbalance power, all current conversion stations participate in adjusting automatically, and the capacity and regulating power requirement to single current conversion station are low, and system is purchased, operation cost is low.
Description
Technical field
The present invention relates to a kind of Multi-end flexible direct current transmission system power distribution method.
Background technology
Multi-end flexible direct current transmission system is by the high voltage direct current between the current conversion station and connection current conversion station of 3 or more than 3
Transmission line of electricity forms.It has the connectivity port of 3 or more than 3 with AC system, and multiple power supply areas can be realized to multiple
Load center is powered, more more economical than using multiple two-terminal direct current transmission systems.Current conversion station in multi-terminal direct current transmission system was both
Converting plant can be used as to run, can also be used as Inverter Station to run, the method for operation is more flexible, can give full play to the warp of direct current transportation
Ji property and flexibility.It can power to passive network, be adapted to the reliable output of wind energy, solar power generation；It can realize new energy
The interconnection of source electric power and primary energy electric power, forms multiple types, the flexible power system of more operating statuses.Multiterminal flexible direct current is defeated
Electric system is to realize that the power between current conversion station is distributed by the control method of current conversion station, at random to solve renewable energy source distribution
The problem of.
The Poewr control method of current conversion station mainly has master ＆ slave control, nargin control and droop control, and between them
Combination control.Wherein master ＆ slave control refers to the distribution of each current conversion station transmit power by top level control device the more demanding of communication
Order；Nargin control be DC voltage in the range of the voltage margin of some current conversion station, the DC current of the current conversion station remains unchanged,
DC voltage more than its nargin scope then current conversion station remains unchanged and DC current changes；The direct current of each current conversion station
Press nargin scope not overlapping, DC voltage value is distributed equivalent to power and instructed, and it is high to communication dependence to overcome master ＆ slave control
Shortcoming.But increasing with current conversion station end number in nargin control, the selection of voltage margin value and the matching of current conversion station are extremely difficult；
Its application is restricted.Droop control is then power distribution current conversion station, detects the variable quantity of voltage, then the DC voltage by setting
With the relation controlling curve of DC current, the control to DC current is realized, carry out power distribution；Another current conversion station then carries out
Constant voltage controls, remaining current conversion station carries out constant dc power control, is not involved in power distribution.The rapid dynamic response speed of this method,
Without the concern for the communication between current conversion station.But only power distribution current conversion station and constant voltage control current conversion station participates in power point
Match somebody with somebody, and the power adjusting ability of constant voltage control current conversion station is small, and the imbalance power of system mainly distributes current conversion station by power
Absorb, it is high to the power and its power adjusting Capability Requirement of power distribution current conversion station.It is difficult to use in the big multiterminal of imbalance power
Flexible direct current power transmission system.
The content of the invention
The object of the present invention is to provide a kind of Multi-end flexible direct current transmission system power distribution method based on V-I curves,
This method is low to the power adjusting Capability Requirement of current conversion station, suitable for the big Multi-end flexible direct current transmission system of imbalance power；
And the stability of system is good, strong antijamming capability.
The present invention is that technical solution is used by realizing its goal of the invention：A kind of multiterminal based on V-I curves are flexible straight
Transmission system power distribution method is flowed, including the sagging power distribution of slope of determining being carried out at the same time is distributed with the sagging power of variable slope,
Wherein：
The operation for determining the sagging distribution of slope is：
A1, DATA REASONING
The current conversion station that stability requirement is low in selection system, which is used as, determines slope current conversion station S0, described determines the slope change of current
Stand S0Detect and gather the DC voltage V in its direct current exit0With DC current I0；
The acquisition of A2, voltage deviation rate
Calculate and determine slope current conversion station S0The voltage deviation rate V in direct current exitE0,Wherein V is is
The load voltage value of system, | | it is signed magnitude arithmetic(al)；
A3, current control value calculate
It is calculated and determines slope current conversion station S0Output current controlling value Ip,
Wherein, K0To fix vertical coefficient, as voltage deviation rate VE0During more than 5%, value 0.83；As voltage deviation rate VE0
During less than or equal to 5%, its value is 2；
A4, determine the sagging power distribution of slope
Slope current conversion station S is determined in controller control0Output current be to determine the current control value I of slope current conversion stationp；
A5, circulation
The operation for repeating A1 to A4 realizes that the sagging power of slope of determining of system distributes；
The operation of the sagging distribution of the variable slope is：
B1, DATA REASONING
Removed in system and determine slope current conversion station S0Outside current conversion station be variable slope current conversion station Si, wherein i is the variable slope change of current
The numbering stood in systems, i=1,2,3,；Variable slope current conversion station SiDetect and gather the DC voltage V in its direct current exitiWith
DC current Ii；
B2, sagging slope calculate
Calculate variable slope current conversion station SiThe voltage deviation rate V in direct current exitEi,
Variable slope current conversion station SiSagging COEFFICIENT KiDetermine：As voltage deviation rate VEiDuring less than or equal to 5%, sagging COEFFICIENT Ki
For infinity；As voltage deviation rate VEiDuring more than 5%, sagging COEFFICIENT KiDrawn by following formula：Wherein I is system
Load current value；
B3, current control value calculate
Variable slope current conversion station SiOutput current controlling value IqiDrawn by following formula,
B4, the power distribution for becoming sagging coefficient
The controller control variable slope current conversion station S of variable slope current conversion station SiiOutput current be variable slope current conversion station SiElectricity
Flow control value Iqi；
B5, circulation
The sagging power distribution of the variable slope of system is realized in the operation for repeating B1 to B4.
Compared with prior art, the beneficial effects of the invention are as follows：
First, each current conversion station of the present invention is acquired by the voltage to DC side, current data, then by each setting
Voltage and current control planning, the output current of current conversion station is controlled, to adjust the DC side output power of current conversion station.Controlled
Journey calculates simply, and the change of DC voltage directly is shown the controlling unit for galvanic electricity stream of standing erectly to the change of current, uneven to system
The fast response time of power.
2nd, when voltage deviation rate is less than or equal to 5%, the sagging coefficient of variable slope current conversion station is infinitely great, i.e. this section of V-I
Curve is a vertical line, and output current is kept constant, namely variable slope current conversion station is not involved in power adjusting, and variable slope current conversion station resists
Interference performance is strong, system run all right；At this time, it is 2 to determine the sagging coefficient of slope current conversion station, determines the change of slope current conversion station output current
It is smaller, while system run all right, imbalance power that also can be in effective, quick distribution system.
3rd, when voltage deviation rate is more than 5%, determine slope current conversion station and larger output current is carried out with 0.83 sagging coefficient
The power distribution of change；The power that variable slope current conversion station carries out output current change with the V-I curves set distributes, current conversion station ginseng
It is positively correlated with the number and the imbalance power of adjusting depth and system of adjusting, when system imbalance power is very big, owns
Current conversion station both participates in adjusting, therefore the present invention is strong to the imbalance power regulating power of system, big suitable for imbalance power
Multi-end flexible direct current transmission system, and since participate in adjusting is all current conversion stations, capacity and adjusting to single current conversion station
Capability Requirement is low, reduce system purchase and operation cost, it is easy to spread.
In short, adjusting sagging slope of the present invention according to system imbalance power size adaptation, realizes system imbalance
The quick distribution of power, has taken into account system rejection to disturbance ability and power distribution rapidity, has improved DC network quality of voltage.
Brief description of the drawings
Fig. 1 is transducer overall structure figure in case study on implementation
Fig. 2 be case study on implementation in operating mode 1) in power distribution diagram
Fig. 3 be case study on implementation in operating mode 2) in power distribution diagram
Fig. 4 be case study on implementation in operating mode 3) in power distribution diagram
Embodiment
With reference to embodiment, the present invention is described in further detail.
Embodiment
A kind of embodiment of the present invention is a kind of Multi-end flexible direct current transmission system power based on V-I curves
Distribution method, including what is be carried out at the same time determine the sagging power distribution of slope and the sagging power distribution of variable slope, wherein：
The operation for determining the sagging distribution of slope is：
A1, DATA REASONING
The current conversion station that stability requirement is low in selection system, which is used as, determines slope current conversion station S0, described determines the slope change of current
Stand S0Detect and gather the DC voltage V in its direct current exit0With DC current I0；
The acquisition of A2, voltage deviation rate
Calculate and determine slope current conversion station S0The voltage deviation rate V in direct current exitE0,Wherein V is is
The load voltage value of system, | | it is signed magnitude arithmetic(al)；
A3, current control value calculate
It is calculated and determines slope current conversion station S0Output current controlling value Ip,
Wherein, K0To fix vertical coefficient, as voltage deviation rate VE0During more than 5%, value 0.83；As voltage deviation rate VE0
During less than or equal to 5%, its value is 2；
A4, determine the sagging power distribution of slope
Slope current conversion station S is determined in controller control0Output current be to determine the current control value I of slope current conversion stationp；
A5, circulation
The operation for repeating A1 to A4 realizes that the sagging power of slope of determining of system distributes；
The operation of the sagging distribution of the variable slope is：
B1, DATA REASONING
Removed in system and determine slope current conversion station S0Outside current conversion station be variable slope current conversion station Si, wherein i is the variable slope change of current
The numbering stood in systems, i=1,2,3,；Variable slope current conversion station SiDetect and gather the DC voltage V in its direct current exitiWith
DC current Ii；
B2, sagging slope calculate
Calculate variable slope current conversion station SiThe voltage deviation rate V in direct current exitEi,
Variable slope current conversion station SiSagging COEFFICIENT KiDetermine：As voltage deviation rate VEiDuring less than or equal to 5%, sagging COEFFICIENT Ki
For infinity；As voltage deviation rate VEiDuring more than 5%, sagging COEFFICIENT KiDrawn by following formula：Wherein I is system
Load current value；
B3, current control value calculate
Variable slope current conversion station SiOutput current controlling value IqiDrawn by following formula,
B4, the power distribution for becoming sagging coefficient
Variable slope current conversion station SiController control variable slope current conversion station SiOutput current be variable slope current conversion station SiElectricity
Flow control value Iqi；
B5, circulation
The sagging power distribution of the variable slope of system is realized in the operation for repeating B1 to B4.
Emulation experiment
Current conversion station S during emulation experiment0To determine slope current conversion station；S1、S2、S3For variable slope current conversion station.The specific emulation of system
Parameter is as shown in table 1, current conversion station S1With current conversion station S3Rectification state is operated in, to system input power；Current conversion station S2And current conversion station
S0Inverter mode is operated in, from system absorbed power；The systematic parameter of four current conversion stations is identical.
1 four end flexible direct current power transmission system parameter of table
The present invention verifies the correctness of multi-terminal system control method by emulating three kinds of different operating modes.
1) to variable slope current conversion station S3Small disturbance occurs and carries out emulation experiment, in emulation experiment, variable slope changed at 2 seconds
Stream station S3DC current reference value become 0.135kA from initial value 0.1kA, the increase of total input active power, DC line
Voltage deviation rate is less than 5%, therefore only determines slope current conversion station S0Participate in power adjusting and reach new equilibrium state；
2) to variable slope current conversion station S3Generation trend, which inverts, carries out emulation experiment, and in emulation experiment, at 2 seconds, variable slope changed
Stream station S3DC current reference value become -0.1kA from initial value 0.1kA, DC current direction flows to direct current from AC system
Transmission line of electricity is changed into flowing into AC system from DC power transmission line；Variable slope current conversion station S3It is changed into system input power state
From system absorbed power state, this moment, total input power is not equal to total output power, its AC line voltage deviation ratio is big
In 5%, by determining slope current conversion station S0With variable slope current conversion station S3Coordinated allocation, system power was reached again in 0.2 second
Balance；
3) to variable slope current conversion station S3Carry out emulation experiment out of service, the variable slope current conversion station S at 3 seconds3Input power
It is zero, AC line voltage deviation ratio is more than 5%.This moment, the total active power of input system reduces, to ensure input power etc.
In output power, by controlling variable slope current conversion station S2With determine slope current conversion station S0Output power reduce system output power,
Adjust total output power and be equal to 0.23 second input power used time, governing speed is fast；At this time, variable slope current conversion station S1Operation shape
State does not change, and improves variable slope current conversion station S1Antijamming capability.
It can be seen that multi-terminal system power coordination control method proposed by the present invention can realize Multi-end flexible direct current transmission system
The quick distribution and adjusting of power, improve multi-terminal system antijamming capability.
Claims (1)
1. a kind of Multi-end flexible direct current transmission system power distribution method based on V-I curves, including what is be carried out at the same time determine slope
Sagging power distribution and the sagging power distribution of variable slope, wherein：
The operation for determining the sagging distribution of slope is：
A1, DATA REASONING
The current conversion station that stability requirement is low in selection system, which is used as, determines slope current conversion station S0, described determines slope current conversion station S0
Detect and gather the DC voltage V in its direct current exit0With DC current I0；
The acquisition of A2, voltage deviation rate
Calculate and determine slope current conversion station S0The voltage deviation rate V in direct current exitE0,Wherein V is system
Load voltage value, | | it is signed magnitude arithmetic(al)；
A3, current control value calculate
It is calculated and determines slope current conversion station S0Output current controlling value Ip,
Wherein, K0To fix vertical coefficient, as voltage deviation rate VE0During more than 5%, value 0.83；As voltage deviation rate VE0It is less than
During equal to 5%, its value is 2；
A4, determine the sagging power distribution of slope
Slope current conversion station S is determined in controller control0Output current be to determine the current control value I of slope current conversion stationp；
A5, circulation
The operation for repeating A1 to A4 realizes that the sagging power of slope of determining of system distributes；
The operation of the sagging distribution of the variable slope is：
B1, DATA REASONING
Removed in system and determine slope current conversion station S0Outside current conversion station be variable slope current conversion station Si, wherein i is that variable slope current conversion station exists
Numbering in system, i=1,2,3,；Variable slope current conversion station SiDetect and gather the DC voltage V in its direct current exitiAnd direct current
Electric current Ii；
B2, sagging slope calculate
Calculate variable slope current conversion station SiThe voltage deviation rate V in direct current exitEi,
Variable slope current conversion station SiSagging COEFFICIENT KiDetermine：As voltage deviation rate VEiDuring less than or equal to 5%, sagging COEFFICIENT KiFor nothing
It is poor big；As voltage deviation rate VEiDuring more than 5%, sagging COEFFICIENT KiDrawn by following formula：Wherein I is the specified of system
Current value；
B3, current control value calculate
Variable slope current conversion station SiOutput current controlling value IqiDrawn by following formula,
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B4, the power distribution for becoming sagging coefficient
Variable slope current conversion station SiController control variable slope current conversion station SiOutput current be variable slope current conversion station SiElectric current control
Value I processedqi；
B5, circulation
The sagging power distribution of the variable slope of system is realized in the operation for repeating B1 to B4.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108574309A (en) * | 2018-04-24 | 2018-09-25 | 华北电力大学（保定） | Indifference DC voltage droop control method suitable for alternating current-direct current mixing micro-capacitance sensor |
| CN112886630A (en) * | 2021-04-29 | 2021-06-01 | 广东电网有限责任公司阳江供电局 | Island voltage control method based on flexible direct current transmission parallel operation system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103178539A (en) * | 2013-03-21 | 2013-06-26 | 浙江省电力公司电力科学研究院 | Direct current voltage deviation slope control method for multi-end flexible direct current power transmission system |
| CN103414179A (en) * | 2013-06-04 | 2013-11-27 | 南方电网科学研究院有限责任公司 | Droop control method suitable for multi-terminal flexible direct current transmission system |
-
2017
- 2017-11-30 CN CN201711236239.9A patent/CN107947218B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103178539A (en) * | 2013-03-21 | 2013-06-26 | 浙江省电力公司电力科学研究院 | Direct current voltage deviation slope control method for multi-end flexible direct current power transmission system |
| CN103414179A (en) * | 2013-06-04 | 2013-11-27 | 南方电网科学研究院有限责任公司 | Droop control method suitable for multi-terminal flexible direct current transmission system |
Non-Patent Citations (1)
| Title |
|---|
| 赵雄光 等: "基于V-I特性的多端柔性直流输电系统的控制策略", 《电工电能新技术》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108574309A (en) * | 2018-04-24 | 2018-09-25 | 华北电力大学（保定） | Indifference DC voltage droop control method suitable for alternating current-direct current mixing micro-capacitance sensor |
| CN108574309B (en) * | 2018-04-24 | 2021-04-27 | 华北电力大学（保定） | Difference-free direct-current voltage droop control method suitable for alternating-current and direct-current hybrid micro-grid |
| CN112886630A (en) * | 2021-04-29 | 2021-06-01 | 广东电网有限责任公司阳江供电局 | Island voltage control method based on flexible direct current transmission parallel operation system |
| CN112886630B (en) * | 2021-04-29 | 2021-07-30 | 广东电网有限责任公司阳江供电局 | Island voltage control method based on flexible direct current transmission parallel operation system |
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