CN105977992B - It is a kind of to change the distribution system that intelligence adjusts idle output based on load - Google Patents
It is a kind of to change the distribution system that intelligence adjusts idle output based on load Download PDFInfo
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- CN105977992B CN105977992B CN201610455020.7A CN201610455020A CN105977992B CN 105977992 B CN105977992 B CN 105977992B CN 201610455020 A CN201610455020 A CN 201610455020A CN 105977992 B CN105977992 B CN 105977992B
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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
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/16—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
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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
- Y02E40/10—Flexible AC transmission systems [FACTS]
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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
- Y02E40/30—Reactive power compensation
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- Supply And Distribution Of Alternating Current (AREA)
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Abstract
Changing the distribution system that intelligence adjusts idle output based on load the invention discloses a kind of, this changes the distribution system that intelligence adjusts idle output based on load, can intelligent recognition and tracking system operation topology and state variation, obtain node voltage, load, the information such as the output of branch line reactive-load compensation can be used, and adjust reactive-load compensation as information source dynamic and intelligent, coordinate the reactive power injection of each distribution SVC equipment, each node voltage of feeder line in distribution system is enabled to meet the requirement of standard, coordinate distribution SVC equipment and provides reactive power support to distribution system, further improve the utilization rate and economic benefit of distributed SVC equipment.
Description
Technical field
The present invention relates to a kind of distribution system changing the idle output of intelligence adjusting based on load.
Background technology
In the power system, voltage be weigh power quality an important indicator, brownout, it is excessively high all not only can shadow
Ring the service life to electrical equipment and efficiency, but also the stabilization and safe operation of entail dangers to electric system.Reactive power equilibrium is
Ensure the important means of voltage stabilization, voltage & var control is to reducing network loss, improving quality of voltage and planning as a whole system resource configuration
Etc. there is important role.
Traditional power distribution network uses voltage-reactive control (VQC), and the pressure regulation of substation is mainly on-load voltage regulation transformation
Device coordinates the switching of capacitor group to realize.As distributed SVC equipment constantly accesses power distribution network, conventional electrical distribution net is changed
Trend flows to and voltage's distribiuting, and since DG outputs have the characteristics that randomness and intermittent, load have fluctuation, can lead
Mutagens power station busbar voltage is qualified and situation that node voltage on feeder line is out-of-limit occurs, and seriously affects the operation control of substation
System strategy.
Quality of voltage is one of the index that distribution network operation is paid close attention to the most, still not to each section in current power distribution network
Point voltage carries out the means of comprehensive monitoring, carry out voltage and adjust to be carried out in the substation powered to power distribution network, or by each
Load is carried out according to respective access point voltage using reactive capacitance compensation.These voltage regulation measures are generally difficult to take into account the overall situation
Voltage level, and lack the method and implementation means for coordinating control.
Currently, the optimization analysis of distribution system calculates comparative maturity, the optimization and control of real-time voltage power-less are main
It is carried out by Energy Management System, also coming from substation to the Real time data acquisition of power grid passes through RTU (remote-terminal unit)
Be acquired and on give the data of Energy Management System.But the voltage and reactive power optimization period of one side bulk power grid usually with
A few minutes or even one hour are that unit carries out periodic duty, and another aspect power grid itself is that a load is in dynamic with the power generation moment
The system of state balance, the state of power grid has occurred that relative to the section of global optimization during real-time voltage power-less controls
Offset.
Invention content
The present invention provides a kind of distribution system changing the idle output of intelligence adjusting based on load, should be based on load variation intelligence
The distribution system of idle output can be adjusted, can intelligent recognition and tracking system operation topology and state variation, obtain node electricity
Pressure, load can use the information such as the output of branch line reactive-load compensation, and adjust reactive-load compensation as information source dynamic and intelligent, coordinate
The reactive power of each distribution SVC equipment is injected, and each node voltage of feeder line in distribution system is enabled to meet standard
It is required that coordinate distribution SVC equipment provides reactive power support to distribution system, distributed SVC equipment is further improved
Utilization rate and economic benefit.
To achieve the goals above, the present invention provides a kind of power distribution system changing the idle output of intelligence adjusting based on load
System, the distribution system include：
Feeder line, which is multiple, for providing electric energy for multiple loads；
SVC equipment, for providing reactive power for feeder line, to maintain the stabilization of feeder line voltage, the SVC equipment
To be multiple, and corresponded with the feeder line；
Grid-connecting apparatus is incorporated into the power networks for realizing SVC equipment and feeder line, the grid-connecting apparatus and the feeder line one
One corresponds to；
And monitoring device；
The monitoring device includes：
Monitoring modular, control module and the communication bus for each module communication；
The monitoring modular, the actual voltage value for monitoring multiple load access points in real time；
The control module include regulation and control judging unit, Optimized model establish unit, reactive power setting acquiring unit and
Reactive power sets output unit, wherein：
The regulation and control judging unit is made whether that regulation and control judge for distribution system current scheduling period start time, packet
It includes and starts in current scheduling period, the voltage that each distribution SVC equipment j uploads corresponding access node to control module respectively has
Valid value Ufj, wherein j=1,2 ..., m, monitoring modular uploads voltage effective value U at load node n to control modulen, control module
Judge whether Un<Ulim1, Ulim1It is then order optimization model foundation for load node voltage effective value lower limiting value as defined in standard
Cell operation otherwise waits for new scheduling time section and starts to be made whether that regulation and control judge again；
The Optimized model establishes unit, for establishing Optimized model；
The reactive power sets acquiring unit, is used for solving-optimizing model, and it is idle to obtain each distribution SVC equipment output
The setting value of power；
The reactive power sets output unit, for sending corresponding output reactive power to each distribution SVC equipment
Setting value.
Preferably, Optimized model establishes unit, as follows for establishing Optimized model：
Control module scheduling object function be：
Constraints is：
Ulim1≤Un(set)
0≤Qj(set)≤Qj(max), j=1,2 ..., m
Wherein, Qj(set)For the setting value of distributed SVC equipment j output reactive powers, Un(set))After carrying out Reactive Power Dispatch
The voltage effective value predicted value of node n, Qj(max)For the threshold limit value of distributed SVC equipment j output reactive powers.
Preferably, reactive power sets acquiring unit, is used for solving-optimizing model, obtains each distribution SVC equipment output
The setting value Q of reactive power1(set),Q2(set),…,Qm(set)；
Calculating Un(set)When, it is realized by following formula：
Wherein, factor alphanjIt is distribution system feed after distributed SVC equipment j injects unit reactive power to distribution system
The voltage effective value variable quantity of line load node n.
Preferably, reactive power sets output unit, for sending corresponding output reactive power to each distribution SVC equipment
Setting value Qj(set), j=1,2 ..., m, each distribution SVC equipment is according to the setting value Q of corresponding output reactive powerj(set)Production
Raw corresponding reactive power is injected into feeder line；Moreover, factor alphanjIt is calculate by the following formula to obtain：
In formula, QjThe reactive power injected to distribution system for distributed SVC equipment j；ΔUnjFor distributed SVC equipment j
Reactive power Q is injected to distribution systemjThe voltage effective value variable quantity of back loading node n.
Preferably, the monitoring modular obtains the position of each load node in distribution system by Topology identification algorithm
It sets and connection relation, the position of the on-position and feeder line reactive-load compensation of determining distribution SVC equipment is distributed by multiple spot
The intelligent measurement terminal information that gets summarize, obtain the capacity and each section of distribution SVC equipment in distribution system
The voltage of point.
Preferably, the main circuit of the SVC equipment is the inverter circuit of three bridge arm of three-phase, by 6 power electronic devices and
DC bus capacitor forms.
Preferably, the SVC equipment uses the modulation system of space vector of voltage, for the ease of straight on alpha-beta coordinate system
Control is connect, voltage fluctuation caused by when switching switchs is reduced, controls SVC output voltage vectors in the inscribed circle of regular hexagon,
Inscribed circle radius isudcIndicate the DC capacitor voltage of SVC.
The invention has the advantages that：(1) can intelligent recognition and tracking system operation topology and state variation, obtain section
Point voltage, load can use the information such as the output of branch line reactive-load compensation, and adjust reactive-load compensation as information source dynamic and intelligent,
Coordinate the reactive power injection of each distribution SVC equipment；(2) each node voltage of feeder line in distribution system is enabled to meet
The requirement of standard coordinates distribution SVC equipment and provides reactive power support to distribution system, further improves distributed SVC
The utilization rate and economic benefit of equipment.
Description of the drawings
Fig. 1 shows that a kind of of the present invention changes the block diagram that intelligence adjusts the distribution system of idle output based on load；
Fig. 2 shows a kind of flow charts of the reactive-load compensation method of the intelligent distribution system based on load.
Specific implementation mode
Fig. 1 shows that a kind of of the present invention changes the distribution system 10 that intelligence adjusts idle output, the distribution based on load
System includes：
Feeder line 14, which is multiple, for providing electric energy for multiple loads 15；
SVC equipment 12, should to maintain the stabilization of feeder line voltage 14 for providing reactive power for 14 tunnel of feed line
SVC equipment is multiple 14, and is corresponded with the feeder line；
Grid-connecting apparatus 13 is incorporated into the power networks for realizing SVC equipment 12 and feeder line 14, the grid-connecting apparatus 13 and the feedback
Electric line 14 corresponds；
With monitoring device 11；
The monitoring device 11 includes：
Monitoring modular 113, control module 112 and the communication bus 111 for each module communication；
The monitoring modular 113, the actual voltage value for monitoring 15 access point of multiple loads in real time；
The control module 112 includes regulation and control judging unit, Optimized model establishes unit, reactive power sets acquiring unit
Output unit is set with reactive power, wherein：
The regulation and control judging unit is made whether that regulation and control judge for distribution system current scheduling period start time, packet
It includes and starts in current scheduling period, the voltage that each distribution SVC equipment j uploads corresponding access node to control module respectively has
Valid value Ufj, wherein j=1,2 ..., m, monitoring modular uploads voltage effective value U at load node n to control modulen, control module
Judge whether Un<Ulim1, Ulim1It is then order optimization model foundation for load node voltage effective value lower limiting value as defined in standard
Cell operation otherwise waits for new scheduling time section and starts to be made whether that regulation and control judge again；
The Optimized model establishes unit, for establishing Optimized model；
The reactive power sets acquiring unit, is used for solving-optimizing model, and it is idle to obtain each distribution SVC equipment output
The setting value of power；
The reactive power sets output unit, for sending corresponding output reactive power to each distribution SVC equipment
Setting value.
Preferably, Optimized model establishes unit, as follows for establishing Optimized model：
Control module scheduling object function be：
Constraints is：
Ulim1≤Un(set)
0≤Qj(set)≤Qj(max), j=1,2 ..., m
Wherein, Qj(set)For the setting value of distributed SVC equipment j output reactive powers, Un(set))After carrying out Reactive Power Dispatch
The voltage effective value predicted value of node n, Qj(max)For the threshold limit value of distributed SVC equipment j output reactive powers.
Preferably, reactive power sets acquiring unit, is used for solving-optimizing model, obtains each distribution SVC equipment output
The setting value Q of reactive power1(set),Q2(set),…,Qm(set)；
Calculating Un(set)When, it is realized by following formula：
Wherein, factor alphanjIt is distribution system feed after distributed SVC equipment j injects unit reactive power to distribution system
The voltage effective value variable quantity of line load node n.
Preferably, reactive power sets output unit, for sending corresponding output reactive power to each distribution SVC equipment
Setting value Qj(set), j=1,2 ..., m, each distribution SVC equipment is according to the setting value Q of corresponding output reactive powerj(set)Production
Raw corresponding reactive power is injected into feeder line；Moreover, factor alphanjIt is calculate by the following formula to obtain：
In formula, QjThe reactive power injected to distribution system for distributed SVC equipment j；ΔUnjFor distributed SVC equipment j
Reactive power Q is injected to distribution systemjThe voltage effective value variable quantity of back loading node n.
Preferably, the monitoring modular obtains the position of each load node in distribution system by Topology identification algorithm
It sets and connection relation, the position of the on-position and feeder line reactive-load compensation of determining distribution SVC equipment is distributed by multiple spot
The intelligent measurement terminal information that gets summarize, obtain the capacity and each section of distribution SVC equipment in distribution system
The voltage of point.
Preferably, the main circuit of the SVC equipment is the inverter circuit of three bridge arm of three-phase, by 6 power electronic devices and
DC bus capacitor forms.
Preferably, the SVC equipment uses the modulation system of space vector of voltage, for the ease of straight on alpha-beta coordinate system
Control is connect, voltage fluctuation caused by when switching switchs is reduced, controls SVC output voltage vectors in the inscribed circle of regular hexagon,
Inscribed circle radius isudcIndicate the DC capacitor voltage of SVC.
Referring to attached drawing 2, a kind of reactive-load compensation method of intelligent distribution system based on load of the invention, including walk as follows
Suddenly：
S1. monitoring modular monitors the voltage value that access point is loaded in distribution system, and the appearance of distribution SVC equipment in real time
Amount；
S2. it is made whether that regulation and control judge in the current scheduling period start time of distribution system：In current scheduled time
Section starts, and monitoring modular uploads voltage effective value U at load node nn, control module judgement：Un<Ulim1？, it is to enter step
S3 otherwise waits for new scheduling time section and starts, is made whether that regulation and control judge again as next current scheduling period；
S3. control module establishes idle intelligence and adjusts Optimized model；
S4. control module solving-optimizing model；
S5. control module sends corresponding Q to each distribution SVC equipmentj(set), j=1,2 ..., m, each distribution SVC equipment
According to the setting value Q of corresponding output reactive powerj(set)It generates corresponding reactive power and is injected into feeder line.
Preferably, in step sl, the monitoring modular is obtained each negative in distribution system by Topology identification algorithm
Position and the connection relation for carrying node, determine the position of the on-position and feeder line reactive-load compensation of distribution SVC equipment, lead to
Summarizing for the information that the intelligent measurement terminal that multiple spot is distributed is got is spent, the capacity of distribution SVC equipment in distribution system is obtained
And the voltage of each node.
Preferably, in the step S2, the section start time each scheduling time of distribution system, each distribution SVC is set
It is standby to need to upload the real-time voltage virtual value U of its access node to control modulef1,Uf2,…,Ufm, this can pass through distribution
SVC equipment interconnections access point voltage monitoring result and easily obtain.Distributed SVC equipment j uploads U to control module in real timefj
(j=1,2 ..., m).
Preferably, in the step S3, control module establishes formula (1), formula (2), Optimized model shown in formula (3)：
Constraints is：
Ulim1≤Un(set) (2)
0≤Qj(set)≤Qj(max), j=1,2 ..., m (3)
The summation for the distributed SVC equipment output reactive power that formula (1) is dispatched required for indicating is minimum, to reduce scheduling nothing
The cost of work(power, Qj(set)For the setting value of distributed SVC equipment j output reactive powers, U in formula (2)n(set)It is idle to carry out
Dispatch the voltage effective value predicted value of posterior nodal point n so that it is not less than Ulim1；Formula (3) is that the output of each distribution SVC equipment is idle
The restrictive condition of power, wherein Qj(max)For distributed SVC equipment j output reactive powers QjThreshold limit value, which is normal
Amount, can know according to the characteristic of distributed SVC equipment, can be stored in control module in advance in the planning and designing stage.
Preferably, in the step S4, control module solving-optimizing model obtains Q1(set),Q2(set),…,Qm(set)：
By each distribution SVC equipment output reactive powers Q of seismic responses calculated1,Q2,…,QmSetting value Q1(set),
Q2(set),…,Qm(set)；
It can be solved with formula (1) as object function, formula (2) and formula by current ripe linearly or nonlinearly planing method
(3) it is the optimization problem of constraints, to obtain Q1(set),Q2(set),…,Qm(set)。
Preferably, U is being calculatedn(set)When, it can be carried out by following formula：
In formula, factor alphanjIt is power distribution network feeder line section after distributed SVC equipment j injects unit reactive power to network
The voltage effective value variable quantity of point n, is formulated as：
In formula, subscript j indicates distribution SVC device numberings, j=1,2 ..., m；QjIt is distributed SVC equipment j to distribution
Net the reactive power of injection；ΔUnjFor distributed SVC equipment j reactive power Q is injected to power distribution networkjThe voltage of posterior nodal point n is effective
It is worth variable quantity.
Preferably, in step s 5, Q is being obtained1(set),Q2(set),…,Qm(set)Afterwards, control module passes through bidirectional communication line
Each distribution SVC equipment transmission reactive power setting value Q of road directionj(set), each distribution SVC equipment is according to setting value Qj(set)Production
Raw corresponding reactive power is injected into feeder line, to meet constraints shown in formula (2).
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
The specific implementation of the present invention is confined to these explanations.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, several equivalent substitute or obvious modifications is made, and performance or use is identical, all should
It is considered as belonging to protection scope of the present invention.
Claims (2)
1. a kind of changing the distribution system that intelligence adjusts idle output based on load, which includes：
Feeder line, which is multiple, for providing electric energy for multiple loads；
SVC equipment, for providing reactive power for feeder line, to maintain the stabilization of feeder line voltage, which is more
It is a, and corresponded with the feeder line；
Grid-connecting apparatus is incorporated into the power networks for realizing SVC equipment and feeder line, and the grid-connecting apparatus is a pair of with the feeder line one
It answers；
And monitoring device；
The monitoring device includes：
Monitoring modular, control module and the communication bus for each module communication；
The monitoring modular, the actual voltage value for monitoring multiple load access points in real time；
The control module includes regulation and control judging unit, Optimized model establishes unit, reactive power sets acquiring unit and idle
Power setting output unit, wherein：
The regulation and control judging unit is made whether that regulation and control judge for distribution system current scheduling period start time, is included in
Current scheduling period starts, and each distribution SVC equipment j uploads the voltage effective value of corresponding access node to control module respectively
Ufj, wherein j=1,2 ..., m, monitoring modular uploads voltage effective value U at load node n to control modulen, control module judgement
Whether Un<Ulim1, Ulim1It is then order optimization model foundation unit for load node voltage effective value lower limiting value as defined in standard
Work otherwise waits for new scheduling time section and starts to be made whether that regulation and control judge again；
The Optimized model establishes unit, for establishing Optimized model；
The reactive power sets acquiring unit, is used for solving-optimizing model, obtains each distribution SVC equipment output reactive powers
Setting value；
The reactive power sets output unit, the setting for sending corresponding output reactive power to each distribution SVC equipment
Value；
The Optimized model establishes unit, as follows for establishing Optimized model：
Control module scheduling object function be：
Constraints is：
Ulim1≤Un(set)
0≤Qj(set)≤Qj(max), j=1,2 ..., m
Wherein, Qj(set)For the setting value of distributed SVC equipment j output reactive powers, Un(set))To carry out Reactive Power Dispatch posterior nodal point n
Voltage effective value predicted value, Qj(max)For the threshold limit value of distributed SVC equipment j output reactive powers；
Reactive power sets acquiring unit, is used for solving-optimizing model, obtains setting for each distribution SVC equipment output reactive powers
Definite value Q1(set),Q2(set),…,Qm(set)；
Calculating Un(set)When, it is realized by following formula：
Wherein, factor alphanjIt is distribution system feeder line after distributed SVC equipment j injects unit reactive power to distribution system
The voltage effective value variable quantity of load node n；
Reactive power sets output unit, the setting value for sending corresponding output reactive power to each distribution SVC equipment
Qj(set), j=1,2 ..., m, each distribution SVC equipment is according to the setting value Q of corresponding output reactive powerj(set)It generates corresponding
Reactive power is injected into feeder line；Moreover, factor alphanjIt is calculate by the following formula to obtain：
In formula, QjThe reactive power injected to distribution system for distributed SVC equipment j；ΔUnjFor distributed SVC equipment j to
Electric system injects reactive power QjThe voltage effective value variable quantity of back loading node n；
The monitoring modular is obtained the position of each load node and connection in distribution system and is closed by Topology identification algorithm
System determines the position of the on-position and feeder line reactive-load compensation of distribution SVC equipment, the intelligent measurement being distributed by multiple spot
The information that terminal is got summarizes, and obtains the voltage of the capacity and each node of distribution SVC equipment in distribution system；
The main circuit of the SVC equipment is the inverter circuit of three bridge arm of three-phase, by 6 power electronic devices and DC bus capacitor group
At.
2. the system as claimed in claim 1, which is characterized in that the SVC equipment uses the modulation system of space vector of voltage,
For the ease of being directly controlled on alpha-beta coordinate system, voltage fluctuation caused by when switching switchs, control SVC output voltages arrow are reduced
In the inscribed circle of regular hexagon, inscribed circle radius is amountudcIndicate the DC capacitor voltage of SVC.
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| CN106549413A (en) * | 2016-12-06 | 2017-03-29 | 广州市科恩电脑有限公司 | A kind of distribution system with distribution type renewable energy |
| CN106655184A (en) * | 2016-12-06 | 2017-05-10 | 广州市科恩电脑有限公司 | Power distribution system capable of intelligent filtering compensation |
| CN114597870B (en) * | 2022-03-18 | 2022-11-11 | 安徽领电智能科技有限公司 | Intelligent power distribution system of building equipment |
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| CN104734164A (en) * | 2015-03-31 | 2015-06-24 | 中国矿业大学 | Control method for low-voltage static var generator based on voltage space vector |
| CN105071410A (en) * | 2015-09-14 | 2015-11-18 | 武汉大学 | Power distribution network reactive power optimized dispatching method and system based on virtual power plant |
| CN105117805A (en) * | 2015-09-15 | 2015-12-02 | 武汉大学 | Optimized scheduling method and system based on virtual power plant of electric vehicle |
| CN105406482A (en) * | 2015-12-07 | 2016-03-16 | 广东电网有限责任公司汕头供电局 | Voltage reactive control method and voltage reactive control system based on reactive compensation device |
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| CN104734164A (en) * | 2015-03-31 | 2015-06-24 | 中国矿业大学 | Control method for low-voltage static var generator based on voltage space vector |
| CN105071410A (en) * | 2015-09-14 | 2015-11-18 | 武汉大学 | Power distribution network reactive power optimized dispatching method and system based on virtual power plant |
| CN105117805A (en) * | 2015-09-15 | 2015-12-02 | 武汉大学 | Optimized scheduling method and system based on virtual power plant of electric vehicle |
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