CN105958472B - A kind of power distribution network operation optimizing system - Google Patents
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- CN105958472B CN105958472B CN201610254733.7A CN201610254733A CN105958472B CN 105958472 B CN105958472 B CN 105958472B CN 201610254733 A CN201610254733 A CN 201610254733A CN 105958472 B CN105958472 B CN 105958472B
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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
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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
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
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Abstract
A kind of power distribution network operation optimizing system includes real-time data base, with electrically optimized computing module, real-time query and setting module, parameter and historical data interface module, DA server and interface module and configuration module.It realizes the optimization of breaker allocation plan and the optimization of the power distribution network method of operation by automated information processing platform, significantly improves power grid power supply reliability, reduces line loss.
Description
Technical field
The present invention relates to power distribution network running technology field, especially a kind of system for optimizing the power distribution network method of operation.
Background technique
Power distribution network is by overhead transmission line, cable, shaft tower, distribution transformer, disconnecting switch, reactive-load compensator and some attached
The compositions such as facility, be the network that important distribution electric energy effect is played in power network.Power distribution network is national economy and social development
Important public infrastructure.In recent years, distribution network construction investment in China's continues to increase, and power distribution network development obtains remarkable effect, but
Electricity consumption level still has a gap with respect to international most advanced level, urban and rural areas disparate development, and power supply quality is to be improved.Power distribution network is
The end section of power grid, it is large number of, structure is complicated, loss is big like the capillary of human body.At the same time, power distribution network is transported
The economic benefit of capable reliability and the economical quality of life for being directly related to electricity consumption user and grid company.
Summary of the invention
It is an object of the invention to provide a kind of power distribution network operation optimizing systems, it passes through automated information processing platform,
It realizes the optimization of breaker allocation plan and the optimization of the power distribution network method of operation, significantly improves power grid power supply reliability, reduces line
Path loss consumption.
It is realized the purpose of the present invention is technical solution in this way, it includes real-time data base, with electrically optimized meter
Calculate module, real-time query and setting module, parameter and historical data interface module, DA server and interface module and group morphotype
Block；Configuration module and parameter and the data interaction of historical data base interface module, parameter is with historical data base interface module and in real time
Database data interaction, real-time data base is respectively and with electrically optimized computing module, real-time query and setting module and DA server
And interface module data interaction；
Power distribution network optimal operation mode, meter are calculated for calculating breaker best configuration scheme with electrically optimized computing module
The power supply reliability in operator region；
Specific step is as follows for the calculating power distribution network optimal operation mode:
1) single supply radial distribution networks system model is established；
2) it is directed to power distribution network, is established by Complicated Distribution Network to the decomposition algorithm of single supply radial distribution networks；
3) power flow algorithm of the single supply radial distribution networks in conjunction with distribution SCADA is established；
4) it is set out based on loss minimization, under the premise of further considering power supply reliability and safety, calculates power distribution network
The optimized operation combination of breaker；
Specific step is as follows for decomposition algorithm described in step 2):
The topological structure parameter for 2-1) reading more power supply Complicated Distribution Network systems, by whole route objects, interconnection switch pair
As the direction discernment traffic sign placement with block switch object is false；
2-2) using the power supply number in power distribution network as cyclic variable, the corresponding single supply radial distribution networks of each power supply
System model, and the state variable of current single supply electricity distribution network model is initialized, state variable includes the model number of plies and each layer
Bus number；
The property parameters of current power, i.e. institute's connection line 2-3) are read, and the source side Search Flags of route are modified
Be it is true, calculate the corresponding bus of institute's connection line, the bus, that is, current single supply system first layer bus, using first layer as
Current layer；
2-4) calculate whole attributes of current layer whole bus, including inlet highway, whole outlet lines and all loads
Branch；
Whether the whole output line numbers for 2-5) judging current layer whole bus are 0；If 0, then terminate to current power
Calculating, 1 otherwise is added to bus layer number variable, and using whole output line numbers of upper one layer whole buses as the mother of current layer
Line number；
2-6) repeat step 2-4) and step 2-5), continue to calculate current single supply electricity distribution network model until completing；
Mains cycle variable 2-7) is added 1, repeats step 2-3), step 2-4), step 2-5) and step 2-6) calculate under
The defeated calculating for penetrating shape distribution network system until completing all power of the corresponding single supply of one power supply；
Power flow algorithm described in step 3) is as follows:
In formula, OutLineNum is the output circuitry number of a certain bus；OutLoadNum is load number on a certain bus；For the power input electric current of a certain bus；
In formula, Rij0It is the resistivity of route, LijIt is the length of route, PTotalLoss(k)It is the damage in kth time iterative process
Consumption, BusLayerNum are the bus number of plies, BusNumLayer[i]It is i-th layer of bus number.
Further, parameter and historical data interface module, for accessing parameter database and historical data library file, including
It reads and is written, and carry out data interaction with real-time data base, establish data.
Further, real-time data base establishes real-time data base memory, for save whole system operation needed for parameter and
Real-time status data；Unified data platform is established, while being Optimization Calculation Program, real-time query program and external data interface
Program provides unified database service interface.
Further, DA server and interface module receive distribution SCADA system for establishing the real-time data base of system
The either next power distribution network real-time status data of SCADA system transmission, the power distribution network real-time status data includes switch shape
State, supply voltage and customer charge.
Further, configuration module, for creating parameter database, management system parameter database, input system structure ginseng
Number；The management system parameter database includes increase, deletion, insertion and modification operation；The input system structural parameters
It include input system parameter list, distribution system parameter list, line parameter circuit value table, interconnection switch parameter list, block switch parameter list
With load parameter table.
Further, real-time query and setting module are used for real-time query distribution network system real-time status variable, manual modification
Or setting system real-time status variable.
Further, the specific algorithm for calculating breaker best configuration scheme is as follows:
P=Min (CS+CL)
In formula, CSFor killer switch investment cost model, CLFor load point interruption cost computation model；
In formula: nLPFor load point sum；TjThere is T for j-th of load pointjKind interruption duration classification；EENStjFor load
The corresponding power loss amount of point j t kind interruption duration；CLjtHave a power failure for the corresponding unit of load point j t kind interruption duration
Loss；
In formula: M is switchtype sum；NjThe number of units being installed in addition with is switched for jth kind；CSjIt is existing that separate unit investment is switched for jth kind
Value, i.e. present worth unit price；I is discount rate；PjFor the service life of jth kind switchgear；
Keep P minimum, completes the configuration optimization of power distribution circuit breakers switch.
By adopting the above-described technical solution, the present invention has the advantage that:
(1) the present invention is based on Visual C++6.0 language to carry out program development, has calculating speed fast and real-time property
Strong advantage is conducive to that program function is extended and is goed deep into next step research；
(2) the compatible Access and SQL Server system of Database Systems, is conducive to according to system scale and cost needs
It is reasonably selected；
(3) application function and platform feature are subjected to modularization separation, establish whole system real-time server platform, is convenient for
Integrated function is established with other systems, facilitates the data of access electric power system power distribution SCADA and SCADA dispatching system；
(4) based on unified data platform, monitoring and the manual modification window of real time data are established convenient for debugging；
(5) killer switch placement algorithm is scientific, reliable, has stronger engineering application value；
(6) show that optimized operation scheme is scientific, practical by optimized operation computational algorithm；
(7) the optimal evaluation criterion established has combined operation of power networks reliability, science and economy, has relatively strong
Application value.
Other advantages, target and feature of the invention will be illustrated in the following description to a certain extent, and
And to a certain extent, based on will be apparent to those skilled in the art to investigating hereafter, Huo Zheke
To be instructed from the practice of the present invention.Target and other advantages of the invention can be wanted by following specification and right
Book is sought to be achieved and obtained.
Detailed description of the invention
Detailed description of the invention of the invention is as follows.
Fig. 1 is single supply radial distribution networks system topology schematic diagram；
Fig. 2 is the relational graph between whole busbar laminates and every layer of whole buses；
Fig. 3 is the flow diagram of decomposition algorithm；
Fig. 4 is flow diagram of the invention.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
A kind of operation interface of power distribution network operation optimizing system includes that data maintenance and administration interface, real time data are inquired
Interface is calculated with manual modification interface and power distribution network running optimizatin and configuration optimization.
Data maintenance and administration interface are the bases of whole system, and the main topological structure for handling power distribution network is to establish
The basis that power distribution network switching optimization and power distribution network optimal operation mode calculate.Entire distribution network system is mainly by following
Table constitute: system parameter table, distribution subsystem parameter list, line parameter circuit value table, interconnection switch parameter list, block switch parameter list,
Power parameter table and load parameter table, in addition, there are also switchtype tables etc..
Real time data inquiry needs to use from distribution SCADA with manual modification interface during computing system trend
The either real time data of SCADA dispatching system.The function of the subsystem is exactly the correctness of real-time monitoring real time data, not
When can receive real time data, the calculating of optimal operation mode can be completed by manual modification real time data.
Power distribution network running optimizatin and configuration optimization calculate interface, including distribution net work structure identifies sub-interface, distribution power flow
Calculate sub-interface, breaker distributes sub-interface rationally and optimized operation scheme calculates sub-interface.Distribution net work structure identifies sub-interface,
Based on the network architecture parameters of power distribution network, in combination with by distribution SCADA system transmit Lai breaker real-time status meter
The structure of distribution network system is calculated, or configures system in real time according to given switch state vector, which is the premise of Load flow calculation.
Distribution power system load flow calculation sub-interface calculates trend in distribution subsystem according to the calculated model of distribution net work structure recognizer
Distribution and grid loss, and be compared with optimal evaluation index.Breaker distributes sub-interface rationally, topology identification,
On the basis of Load flow calculation and maintenance cost calculate, optimal breaker allocation plan is calculated.Optimized operation scheme calculates son
Interface, on the basis of network topology identification and Load flow calculation, by the every kind of state of exploitation for changing switch state vector
Index value under vector, and optimized operation scheme is calculated according to index value to compare.
Fig. 1 is single supply radial distribution networks system topology schematic diagram, the base that Complicated Distribution Network system load flow calculates
This thought is that Complicated Distribution Network is decomposed into the progress of several single supply electric power distribution network systems, and the total losses of whole network are equal to complete
The sum of the loss of portion's single supply subsystem.Therefore, the model for establishing single supply radial distribution networks system is computing system loss
Basis, and using forward-backward sweep method calculate single supply distribution subsystem trend precondition.
Since C Plus Plus has computational efficiency high, it is suitable for calculating in real time, using bus nodes as core, establishes and use C++ language
The object model that speech indicates is conducive to the exploitation and calculating of whole system.Whole system whole busbar laminate and every layer of whole buses
Between relationship can be summarized as Fig. 2.In Fig. 2, the data structure of each bus object are as follows:
typedef struct_BusModel_
{WORD BusNo；| | this bus number
WORD LaBusBus；| | upper one layer of bus number
WORD InLineNo；| | incoming line number
WORD OutLineNum；| | output line number
WORD OutLine[MaxNum]；| | outlet line object
WORD OutLoadNum；| | even load number；
WORD OutLoad[MaxNum]；| | even load object；
}BusModel；
As shown in figure 3, specific step is as follows for decomposition algorithm described in step 2):
The topological structure parameter for 2-1) reading more power supply Complicated Distribution Network systems, by whole route objects, interconnection switch pair
As the direction discernment traffic sign placement with block switch object is false；
2-2) using the power supply number in power distribution network as cyclic variable, the corresponding single supply radial distribution networks of each power supply
System model, and the state variable of current single supply electricity distribution network model is initialized, state variable includes the model number of plies and each layer
Bus number；
The property parameters of current power, i.e. institute's connection line 2-3) are read, and the source side Search Flags of route are modified
Be it is true, calculate the corresponding bus of institute's connection line, the bus, that is, current single supply system first layer bus, using first layer as
Current layer；
2-4) calculate whole attributes of current layer whole bus, including inlet highway, whole outlet lines and all loads
Branch；
Whether the whole output line numbers for 2-5) judging current layer whole bus are 0；If 0, then terminate to current power
Calculating, 1 otherwise is added to bus layer number variable, and using whole output line numbers of upper one layer whole buses as the mother of current layer
Line number；
2-6) repeat step 2-4) and step 2-5), continue to calculate current single supply electricity distribution network model until completing；
Mains cycle variable 2-7) is added 1, repeats step 2-3), step 2-4), step 2-5) and step 2-6) calculate under
The defeated calculating for penetrating shape distribution network system until completing all power of the corresponding single supply of one power supply；
Embodiment:
The present invention is applied in certain switching station's distribution network system, certain switching station's distribution network system is become by A substation and B
Power station power supply, centre are connected with feeder pillar.According to the application method of the developed software systems of this project, certain opening and closing is summarized first
The network model of institute's distribution network system, including 2 power supplys, 13 routes, 1 interconnection switch, 6 block switches, 12 nodes
It is loaded with 17.The administrative load of certain switching station's distribution network system is shown in table 1.
Certain the administrative load meter of switching station's distribution network system of table 1
Table 2 is the administrative distribution line and its length of certain switching station's distribution network system.Wherein, the route that length is 0 be for
Meet topology controlment to need and increased virtual circuit.
Certain the administrative circuit table of switching station's distribution network system of table 2
Under the premise of meeting distribution network system reliability, there are three kinds of typical power supply moulds for certain switching station's distribution network system
Formula, as shown in table 3.
Certain the switching station's distribution network system powering mode table of table 3
| Number | Mode state |
| 1 | Interconnection switch disconnects, other switches close |
| 2 | 601 switches disconnect, other switches close |
| 3 | 602 switches disconnect, other switches close |
The present invention is in underloading in specified state of value and bus I in all loads respectively and bus II is in rated condition
2 kinds of load patterns under calculate the optimized operation mode of certain switching station's distribution network system, and comparative analysis operation result.
(1), under rated load state
Corresponding line losses management when running under mode one, two and three respectively, the results are shown in Table 4:
Each powering mode corresponds to network loss table to certain switching station of table 4 at rated loads
| Number | Mode state | Corresponding loss (kW) |
| 1 | Interconnection switch disconnects, other switches close | 380.5 |
| 2 | 601 switches disconnect, other switches close | 711.1 |
| 3 | 602 switches disconnect, other switches close | 423.2 |
By table 4 as it can be seen that under nominal load operating condition, the corresponding network loss of mode 1 is the smallest, therefore calculated is matched herein
Grid operation mode is optimal, loss minimization.If operating in other both of which, network loss will respectively increase 330.6kW and
42.7kW。
(2), bus I is in underloading, and bus II is in rated value
When the load of system changes, it is assumed that the actual value of a certain moment whole load is as shown in table 5
A certain variation moment forecast load meter (bus I underloading) of certain the switching station's system of table 5
| Load number | Load name | Load rated power |
| 1 | 3B | 20kVA |
| 2 | 5B | 10kVA |
| 3 | 7B | 20kVA |
| 4 | 8B | 10kVA |
| 5 | 9B | 10kVA |
| 6 | 10B | 10kVA |
| 7 | 12B | 10kVA |
| 8 | 11B | 1000kVA |
| 9 | 6B | 1000kVA |
| 10 | 4B | 1000kVA |
| 11 | 2B | 1000kVA |
| 12 | Specially become 1B | 1250kVA |
| 13 | 1B | 800kVA |
| 14 | 2B | 630kVA |
| 15 | 3B | 630kVA |
| 16 | Load 16 | 1000kVA |
| 17 | Load 17 | 800kVA |
The actual power all loaded is set as the given operating condition value of table 5, optimized operation mode is calculated, optimizes operation side
Formula is: disconnecting 602 switches, closes interconnection switch and other 5 block switches.Meanwhile mould of all powering listed by table 3 is respectively set
Formula simultaneously calculates corresponding network loss.In the case where bus I is lightly loaded load condition, corresponding line losses management when mode is once run；In bus I
It is lightly loaded under load condition, corresponding line losses management when being run under mode two；In the case where bus I is lightly loaded load condition, mode three is lower to be transported
Corresponding line losses management when row.
The corresponding calculated result of three of the above powering mode is concluded, as shown in table 6.
The powering mode table under bus I light duty of 6 certain electric substation of table
| Number | Mode state | Corresponding loss (kW) |
| 1 | Interconnection switch disconnects, other switches close | 272.3 |
| 2 | 601 switches disconnect, other switches close | 277.0 |
| 3 | 602 switches disconnect, other switches close | 168.8 |
As it can be seen that in bus I underloading, under bus II is in rated value operating condition, the corresponding network loss of calculated operational mode is
The minimum value of network loss under all possibility modes, therefore mode 3 is the optimal method of operation at this time.If empirically system transported
Row is in mode 1, then network loss will increase 103.5kW.
It can be seen that the power distribution network optimization system that the present invention develops can be according to the real-time change of load from analysis above
Change the optimized operation mode for providing distribution network system, loss minimization, to improve the economy of power distribution network operation.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of the technical program, should all be covered in the present invention
Scope of the claims in.
Claims (7)
1. a kind of power distribution network operation optimizing system, which is characterized in that the system comprises have real-time data base, match electrically optimized calculating
Module, real-time query and setting module, parameter and historical data interface module, DA server and interface module and configuration module；
Configuration module and parameter and the data interaction of historical data base interface module, parameter and historical data base interface module and real time data
Library data interaction, real-time data base is respectively and with electrically optimized computing module, real-time query and setting module and DA server and connecing
Mouth module data interaction；
Power distribution network optimal operation mode is calculated, son is calculated for calculating breaker best configuration scheme with electrically optimized computing module
The power supply reliability in region；
Specific step is as follows for the calculating power distribution network optimal operation mode:
1) single supply radial distribution networks system model is established；
2) it is directed to power distribution network, is established by Complicated Distribution Network to the decomposition algorithm of single supply radial distribution networks；
3) power flow algorithm of the single supply radial distribution networks in conjunction with distribution SCADA is established；
4) it is set out based on loss minimization, under the premise of further considering power supply reliability and safety, calculates power distribution network open circuit
The optimized operation combination of device；
Specific step is as follows for decomposition algorithm described in step 2):
The topological structure parameter for 2-1) reading more power supply Complicated Distribution Network systems, by whole route objects, interconnection switch object and
The direction discernment traffic sign placement of block switch object is false；
2-2) using the power supply number in power distribution network as cyclic variable, the corresponding single supply radial distribution networks system of each power supply
Model, and the state variable of current single supply electricity distribution network model is initialized, state variable includes the bus of the model number of plies and each layer
Number；
The property parameters of current power, i.e. institute's connection line 2-3) are read, and the source side Search Flags of route are revised as very,
Calculate the corresponding bus of institute's connection line, the bus, that is, current single supply system first layer bus, using first layer as current
Layer；
2-4) calculate whole attributes of current layer whole bus, including inlet highway, whole outlet lines and whole load branch；
Whether the whole output line numbers for 2-5) judging current layer whole bus are 0；If 0, then terminate the meter to current power
It calculates, 1 otherwise is added to bus layer number variable, and using whole output line numbers of upper one layer whole buses as the bus of current layer
Number；
2-6) repeat step 2-4) and step 2-5), continue to calculate current single supply electricity distribution network model until completing；
Mains cycle variable 2-7) is added 1, repeats step 2-3), step 2-4), step 2-5) and step 2-6) calculate it is next
The defeated calculating for penetrating shape distribution network system until completing all power of the corresponding single supply of power supply；
Power flow algorithm described in step 3) is as follows:
In formula, OutLineNum is the output circuitry number of a certain bus；OutLoadNum is load number on a certain bus；
For the power input electric current of a certain bus；
In formula, Rij0It is the resistivity of route, LijIt is the length of route, PTotalLoss(k)It is the loss in kth time iterative process,
BusLayerNum is the bus number of plies, BusNumLayer[i]It is i-th layer of bus number.
2. power distribution network operation optimizing system as described in claim 1, it is characterised in that: parameter and historical data interface module,
Data interaction is carried out for accessing parameter database and historical data library file, including reading and write-in, and with real-time data base,
Establish data.
3. power distribution network operation optimizing system as described in claim 1, it is characterised in that: real-time data base establishes real time data
Library memory, for parameter and real-time status data needed for saving whole system operation；Unified data platform is established, is simultaneously
Optimization Calculation Program, real-time query program and external data interface program provide unified database service interface.
4. power distribution network operation optimizing system as described in claim 1, it is characterised in that: DA server and interface module are used for
The real-time data base of system is established, the power distribution network real-time status number that the either SCADA system transmission of distribution SCADA system comes is received
According to the power distribution network real-time status data includes switch state, supply voltage and customer charge.
5. power distribution network operation optimizing system as described in claim 1, it is characterised in that: configuration module, for creating parameter number
According to library, management system parameter database, input system structural parameters；The management system parameter database includes to increase, delete
Remove, be inserted into and modify operation；The input system structural parameters include input system parameter list, distribution system parameter list, line
Road parameter list, interconnection switch parameter list, block switch parameter list and load parameter table.
6. power distribution network operation optimizing system as described in claim 1, it is characterised in that: real-time query and setting module are used for
Real-time query distribution network system real-time status variable, manual modification or setting system real-time status variable.
7. power distribution network operation optimizing system as described in claim 1, which is characterized in that the calculating breaker best configuration side
The specific algorithm of case is as follows:
P=Min (CS+CL)
In formula, CSFor killer switch investment cost model, CLFor load point interruption cost computation model；
In formula: nLPFor load point sum；TjThere is T for j-th of load pointjKind interruption duration classification；EENStjFor load point j
The corresponding power loss amount of t kind interruption duration；CLjtFor the corresponding unit loss of outage of load point j t kind interruption duration；
In formula: M is switchtype sum；NjThe number of units being installed in addition with is switched for jth kind；CSjSeparate unit time-adjusted investment is switched for jth kind, i.e.,
Present worth unit price；I is discount rate；PjFor the service life of jth kind switchgear；
Keep P minimum, completes the configuration optimization of power distribution circuit breakers switch.
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| CN106877335B (en) * | 2017-03-31 | 2019-10-25 | 中国联合网络通信集团有限公司 | The treating method and apparatus of supply network |
| CN107526003A (en) * | 2017-07-20 | 2017-12-29 | 北京天泰怡和科技有限公司 | Intelligent distribution network automatic analysis system |
| CN111404581B (en) * | 2020-03-24 | 2021-10-29 | 佳源科技有限公司 | High-speed reliable Internet of things power broadband carrier High Performance Liquid Chromatography (HPLC) system |
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| US20150012144A1 (en) * | 2013-07-08 | 2015-01-08 | Eaton Corporation | Method and apparatus for optimizing a hybrid power system with respect to long-term characteristics by online optimization, and real-time forecasts, prediction or processing |
| CN104362623A (en) * | 2014-11-10 | 2015-02-18 | 国家电网公司 | Multi-target network reestablishing method for active power distribution network |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102254256A (en) * | 2011-07-21 | 2011-11-23 | 福建省电力有限公司福州电业局 | Transmission and distribution network integration comprehensive line loss management analysis system and processing flow thereof |
| US20150012144A1 (en) * | 2013-07-08 | 2015-01-08 | Eaton Corporation | Method and apparatus for optimizing a hybrid power system with respect to long-term characteristics by online optimization, and real-time forecasts, prediction or processing |
| CN104092211A (en) * | 2014-07-14 | 2014-10-08 | 国家电网公司 | Switch optimal configuration method capable of meeting self-healing requirement of distribution network |
| CN104362623A (en) * | 2014-11-10 | 2015-02-18 | 国家电网公司 | Multi-target network reestablishing method for active power distribution network |
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