CN107492890B - A kind of cyclization turns the calculation method of power supply control parameter - Google Patents
A kind of cyclization turns the calculation method of power supply control parameter Download PDFInfo
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- CN107492890B CN107492890B CN201710994277.4A CN201710994277A CN107492890B CN 107492890 B CN107492890 B CN 107492890B CN 201710994277 A CN201710994277 A CN 201710994277A CN 107492890 B CN107492890 B CN 107492890B
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Classifications
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- H02J3/005—
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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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- 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
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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Abstract
This application discloses the calculation methods that a kind of cyclization turns power supply control parameter, comprising: obtains Distribution Network Equipment parameter, constructs power distribution network Optimized model according to Distribution Network Equipment parameter;Using power distribution network Optimized model, cyclization is carried out based on tidal current computing method and turns power supply calculation, obtains control parameter;Obtain the parameter preset in database;According to parameter preset, judge whether control parameter meets the requirements, meet the requirements and generate power flowcontrol signal, power flowcontrol signal is returned into Dispatching monitor and control system, is unsatisfactory for, executes the first step;Power flowcontrol signal is generated, power flowcontrol signal is returned into Dispatching monitor and control system.This application provides the calculation methods that a kind of cyclization turns power supply control parameter, data acquisition needed for calculating process is in the power distribution network Optimized model, so obtained calculated result can really react current grid operating conditions, guarantee that current grid operating conditions can reach the requirement of management and running in this way.
Description
Technical field
This application involves the calculation methods that Power System Analysis field more particularly to a kind of cyclization turn power supply control parameter.
Background technique
China's power distribution network is mostly the radial single loop mode of connection.When line failure, need to cut off the power, it will
It causes the short time at the tributary user end to have a power failure, destroys the stability of system power supply, be unable to satisfy user to power supply continuity
Requirement.
Loop Closing Operation refers in the case where guaranteeing not have a power failure, by being closed interconnection switch, by the two of same voltage class
Item or a plurality of distribution line are converted to the operation of cyclic wire connection from radial wiring.Cyclization turns power supply as a kind of novel power supply
Mode is not required to the additional construction of line, and when failure occurs, when needing to carry out power failure operation, by interconnection switch, (cyclization point is in branch
On) or bus connection switch (cyclization point is on bus) can from another branch obtain electric energy, save the investment of line construction, simultaneously
Also guarantee the continuity and reliability of power supply.
Currently, closed loop network turns in power supply process, power flowcontrol value, power plant's power output controlling value and load control system in looped network
Value is calculated by artificial, and not only working efficiency is low, but also calculates required data from distribution automation system
Historical data, calculated result mistake can be made, be unable to the current grid operating conditions of actual response, and cause cyclization turn
The security risk of the method for operation, mistuning, accidentally control is accidentally arranged in power supply process.
Summary of the invention
This application provides the calculation methods that a kind of cyclization turns power supply control parameter, turn power supply calculation to solve existing cyclization
As a result the problem of there is mistake, being unable to actual response current grid operating conditions, and therefore bring cyclization turns to power
The method of operation is accidentally arranged in journey, mistuning, accidentally controls the problem of security risk.
This application provides the calculation methods that a kind of cyclization turns power supply control parameter, which is characterized in that the described method includes:
Step S1: obtaining Distribution Network Equipment parameter, constructs power distribution network Optimized model according to Distribution Network Equipment parameter;
Step S2: utilizing power distribution network Optimized model, carries out cyclization based on tidal current computing method and turns power supply calculation, is controlled
Parameter, the control parameter include power flowcontrol limiting value in looped network, power plant's power output controlling value and load control system value;
Step S3: obtaining the parameter preset in database, and the parameter preset includes main transformer capacity, power plant's installation appearance
It measures, when daily trading planning power generating value maximum value and power flow control limiting value;
Step S4: according to parameter preset, judging whether control parameter meets the requirements, meet the requirements of S5, is discontented with
Foot executes step S1;
Step S5: generating power flowcontrol signal, and power flowcontrol signal is returned to Dispatching monitor and control system.
This application provides the calculation methods that a kind of cyclization turns power supply control parameter to be based on using power distribution network Optimized model
Tidal current computing method calculates the control parameter, and the control parameter and the parameter preset in database are compared
Compared with generating power flowcontrol signal, and by power flowcontrol signal when the control parameter meets the requirement of the parameter preset
Back to Dispatching monitor and control system, data acquisition needed for calculating process is in the power distribution network Optimized model, the distribution network optimization
The data changed in model are standard distributed net device parameter and Real-time Power Flow data, so obtained calculated result can be true
Current grid operating conditions are reacted, guarantee that current grid operating conditions can reach the requirement of management and running in this way, so that
Cyclization turns correctly arrange the method for operation, correct adjustment route in power supply process and correctly controls route.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the application, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without any creative labor,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is the flow chart for the calculation method that a kind of cyclization of the application turns power supply control parameter;
Fig. 2 is the flow chart for the calculation method that a kind of cyclization of the application turns power supply control parameter.
Specific embodiment
Referring to Fig. 1, turn the flow chart of the calculation method of power supply control parameter for a kind of cyclization of the application, the one of the application is real
It applies example a kind of calculation method that cyclization turns power supply control parameter is provided and include:
Step S11: obtaining Distribution Network Equipment parameter, constructs power distribution network Optimized model according to Distribution Network Equipment parameter.
Step S12: utilizing power distribution network Optimized model, carries out cyclization based on tidal current computing method and turns power supply calculation, is controlled
Parameter processed, the control parameter include power flowcontrol limiting value in looped network, power plant's power output controlling value and load control system value.
Above-mentioned tidal current computing method is the most basic calculation method of electric system and most important calculation method, so-called
Tidal current computing method is exactly the mode of connection and parameter and service condition of known power grid, calculates power system mesomeric state and run each mother
Line voltage, each branch current and power and network loss may determine that power grid by Load flow calculation for the electric system being currently running
Whether busbar voltage, branch current and power are out-of-limit, if there is out-of-limit, should just take measures, and the method for operation are adjusted, for
The electric system of planning can provide foundation, Load flow calculation by Load flow calculation for selection power grid power supply plan and electrical equipment
Initial data can also be provided for relay protection and the fixed whole calculating of automatic device, electric power system fault calculating and stability Calculation etc..
Power flowcontrol limiting value is the minimum value of Load flow calculation in looped network in above-mentioned looped network.
Above-mentioned power plant's power output controlling value is the power output controlling value of power plant.
Above-mentioned load control system value is record of the basis to load, and then reaches and carry out controlling to obtain value to electric energy service condition.
Step S13: obtaining the parameter preset in database, and the parameter preset includes main transformer capacity, power plant's installation
Capacity, when daily trading planning power generating value maximum value and power flow control limiting value.
The main transformer capacity abbreviation main transformer refers to the transformer for being mainly used for power transmission and transformation, the main transformer capacity
It is collected in distribution automation system, the value that the main transformer capacity is marked for factory nameplate.
The power plant unit capacity is the summation of the specified effective power of actual installation generating set in power plant, power plant's dress
Machine capacity is collected in the power plant basis account data in small power station's system.
The daily trading planning power generating value of working as refers to the maximum power output value of the generating set of same day power plant, the same day
Generation schedule power generating value is collected in power grid small power station system.
The power flow control limiting value refers to the minimum value of the power flow control in looped network.
Step S14: according to parameter preset, judge whether control parameter meets the requirements, meet the requirements of S15, no
Meet and executes step S11.
Step S15: generating power flowcontrol signal, and power flowcontrol signal is returned to Dispatching monitor and control system, the dispatching and monitoring
System is the dedicated equipment to grid equipment control monitoring of electric power dispatching system.
This application provides the calculation methods that a kind of cyclization turns power supply control parameter to be based on using power distribution network Optimized model
Tidal current computing method calculates the control parameter, and the control parameter and the parameter preset in database are compared
Compared with generating power flowcontrol signal, and by power flowcontrol signal when the control parameter meets the requirement of the parameter preset
Back to Dispatching monitor and control system, data acquisition needed for calculating process is in the power distribution network Optimized model, the distribution network optimization
The data changed in model are standard distributed net device parameter and Real-time Power Flow data, so obtained calculated result can be true
Current grid operating conditions are reacted, guarantee that current grid operating conditions can reach the requirement of management and running in this way, so that
Cyclization turns correctly arrange the method for operation, correct adjustment route in power supply process and correctly controls route.
Fig. 2 is a kind of flow chart for the calculation method that cyclization turns power supply control parameter, and another embodiment of the application provides
A kind of calculation method that cyclization turns power supply control parameter includes:
Step S21: the Svg file and Qs file in distribution automation system are called, parameter identification method and state are utilized
The estimation technique obtains Distribution Network Equipment parameter.
The Svg file is scalable vector graphics.
The parameter identification method is that one group of parameter value is determined according to experimental data and the model of foundation, so that by model meter
The best fitting test data (curve fit problem) of obtained numerical result energy, it is pre- so as to be carried out for production process
It surveys, certain theoretical direction is provided, when the error between the numerical result and test value being calculated is larger, is considered as the number
Model is not inconsistent with actual process or gap is larger, and then modifies model, reselects parameter.
The state estimate is the method for estimating dynamical system internal state according to retrievable metric data, to system
Output and input measured obtained from data can only reflect the external behavior of system, and the dynamic law of system needs to use
Internal (usually can not directly measure) state variable describes.
Step S22: calling the Real-time Power Flow data in distribution automation system, and the Real-time Power Flow data include electricity
Pressure, electric current, active power, the Real-time Power Flow data are handed over by automated system data and metering automation system data
Fork comparison is got, and when Real-time Power Flow shortage of data, metering automation system is called to be supplemented with time point flow data, when
When Real-time Power Flow data exception, the history flow data that is averaged is taken to be modified.
Step S23: power distribution network Optimized model is constructed according to Distribution Network Equipment parameter and Real-time Power Flow data.
Step S24: utilizing power distribution network Optimized model, carries out cyclization based on tidal current computing method and turns power supply calculation, is controlled
Parameter processed, the control parameter include power flowcontrol limiting value in looped network, power plant's power output controlling value and load control system value.
Step S25: the Load flow calculation parameter of the looped network in distribution automation system is obtained, the looped network includes electromagnetism ring
Net and electrical looped network, the Load flow calculation parameter include the power flow control limiting value of n-th section of route in looped network, in looped network
The heat stable value of n-th section of route in the active capacity of n transformer, looped network, the protection definite value of n-th section of route, looped network in looped network
Minimum definite value, the route voltage rating, power factor of interior n-th section of route both ends transformer substation current transformer.
Step S26: the power flow control limit in electromagnetic looped network and electrical looped network is calculated according to Load flow calculation parameter
Value includes:
If it is electromagnetic looped network, calculated according to following formula:
Ph1=Min (Pl1, Pl2... Pln, Pt1, Pt2... Ptn)
In formula, Ph1For the power flow control limiting value in electromagnetic looped network, PlnHave for n-th section of route in electromagnetic looped network
Function power flowcontrol limiting value, PtnFor active capacity, the I of n-th of transformer in electromagnetic looped networkir1For n-th section of route in electromagnetic looped network
Heat stable value, Iidz1For the protection definite value of n-th section of route, I in electromagnetic looped networkki1Become for n-th section of route both ends in electromagnetic looped network
The minimum definite value of power station current transformer, Ue1For in electromagnetic looped network route voltage rating,For the function in electromagnetic looped network
Rate factor, P1 are the active power in electromagnetic looped network route, S1For the apparent energy in electromagnetic looped network route.
If it is electrical looped network, calculated according to following formula:
Ph2=Min (Py1, Py2... Pyn)
In formula, Ph2For the power flow control limiting value in electrical looped network, PynHave for n-th section of route in electrical looped network
Function power flowcontrol limiting value, Iir2For heat stable value, the I of n-th section of route in electrical looped networkidz2For n-th section of route in electrical looped network
Protection definite value, Iki2For the minimum definite value of n-th section of route both ends transformer substation current transformer, U in electrical looped networke2For electrical ring
Route voltage rating in net,For the power factor in electrical looped network, P2For in electrical loop grid active power,
S2For the apparent energy in electrical loop grid.
Step S27: main transformer capacity and power plant unit capacity are obtained.
Step S28: database is constructed according to main transformer capacity, power plant unit capacity and power flow control limiting value.
Step S29: according to parameter preset, judge whether control parameter meets the requirements, meet the requirements of S210, no
Meeting execution step S21 includes:
When power plant's power output controlling value is contributed less than or equal to power plant unit capacity, and less than or equal to daily trading planning is worked as
When the maximum value of value, step S210 is executed.
When controlling value is contributed greater than power plant unit capacity, or greater than the maximum value for working as daily trading planning power generating value by power plant
When, execute step S21.
When load control system value is less than or equal to main transformer capacity, step S210 is executed.
When load control system value is greater than main transformer capacity, step S21 is executed.
When power flowcontrol limiting value is less than or equal to the power flow control limiting value in looped network in looped network, step is executed
Step S210.
When power flowcontrol limiting value is greater than the power flow control limiting value in looped network in looped network, step S21 is executed.
Step S210: generating power flowcontrol signal, and power flowcontrol signal is returned to Dispatching monitor and control system.
This application provides the calculation methods that a kind of cyclization turns power supply control parameter to be based on using power distribution network Optimized model
Tidal current computing method calculates the control parameter, and the control parameter and the parameter preset in database are compared
Compared with generating power flowcontrol signal, and by power flowcontrol signal when the control parameter meets the requirement of the parameter preset
Back to Dispatching monitor and control system, data acquisition needed for calculating process is in the power distribution network Optimized model, the distribution network optimization
The data changed in model are standard distributed net device parameter and Real-time Power Flow data, so obtained calculated result can be true
Current grid operating conditions are reacted, guarantee that current grid operating conditions can reach the requirement of management and running in this way, so that
Cyclization turns correctly arrange the method for operation, correct adjustment route in power supply process and correctly controls route.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field similarly includes protecting range on patent of the invention is protected.
Claims (5)
1. the calculation method that a kind of cyclization turns power supply control parameter, which is characterized in that the described method includes:
Step S1: obtaining Distribution Network Equipment parameter, constructs power distribution network Optimized model according to Distribution Network Equipment parameter;The acquisition is matched
Grid equipment parameter, comprising:
Step S11: the Svg file and Qs file in distribution automation system are called, parameter identification method and state estimation are utilized
Method obtains Distribution Network Equipment parameter;
Step S12: the Real-time Power Flow data in distribution automation system are called, the Real-time Power Flow data include voltage, electricity
Stream, active power;
Step S13: power distribution network Optimized model is constructed according to Distribution Network Equipment parameter and Real-time Power Flow data;
Step S2: utilizing power distribution network Optimized model, carries out cyclization based on tidal current computing method and turns power supply calculation, obtains control ginseng
Number, the control parameter include power flowcontrol limiting value in looped network, power plant's power output controlling value and load control system value;
Step S3: obtain database in parameter preset, the parameter preset include main transformer capacity, power plant unit capacity,
When daily trading planning power generating value maximum value and power flow control limiting value;
Step S4: according to parameter preset, judge whether control parameter meets the requirements, meet the requirements of S5, be unsatisfactory for holding
Row step S1;
Step S5: generating power flowcontrol signal, and power flowcontrol signal is returned to Dispatching monitor and control system.
2. the method as described in claim 1, which is characterized in that the step S3 obtains the parameter preset in database, comprising:
Step S31: obtain distribution automation system in looped network Load flow calculation parameter, the looped network include electromagnetic looped network and
Electrical looped network, the Load flow calculation parameter include the power flow control limiting value of n-th section of route in looped network, n-th in looped network
The heat stable value of n-th section of route in the active capacity of transformer, looped network, the protection definite value of n-th section of route in looped network, in looped network
Minimum definite value, the route voltage rating, power factor of n sections of route both ends transformer substation current transformers;
Step S32: the power flow control limiting value in electromagnetic looped network and electrical looped network is calculated according to Load flow calculation parameter;
Step S33: main transformer capacity and power plant unit capacity are obtained;
Step S34: database is constructed according to main transformer capacity, power plant unit capacity and power flow control limiting value.
3. method according to claim 2, which is characterized in that if it is electromagnetic looped network, the step S32 is according to Load flow calculation
Parameter calculates the power flow control limiting value in electromagnetic looped network and electrical looped network
It is calculated according to following formula:
Ph1=Min (Pl1, Pl2... Pln, Pt1, Pt2... Ptn)
In formula, Ph1For the power flow control limiting value in electromagnetic looped network, PlnFor the effective power flow of n-th section of route in electromagnetic looped network
Control electrode limit value, PtnFor active capacity, the I of n-th of transformer in electromagnetic looped networkir1Heat for n-th section of route in electromagnetic looped network is steady
Definite value, Iidz1For the protection definite value of n-th section of route, I in electromagnetic looped networkki1For n-th section of route both ends substation electricity in electromagnetic looped network
The minimum definite value of current transformer, Ue1For in electromagnetic looped network route voltage rating,For in electromagnetic looped network power factor,
P1For the active power in electromagnetic looped network route, S1For the apparent energy in electromagnetic looped network route.
4. method as claimed in claim 3, which is characterized in that if it is electrical looped network, the step S32 is according to Load flow calculation
Parameter calculates the power flow control limiting value in electromagnetic looped network and electrical looped network
It is calculated according to following formula:
Ph2=Min (Py1, Py2... Pyn)
In formula, Ph2For the power flow control limiting value in electrical looped network, PynFor the effective power flow of n-th section of route in electrical looped network
Control electrode limit value, Iir2For heat stable value, the I of n-th section of route in electrical looped networkidz2For the protection of n-th section of route in electrical looped network
Definite value, Iki2For the minimum definite value of n-th section of route both ends transformer substation current transformer, U in electrical looped networke2For in electrical looped network
Route voltage rating,For the power factor in electrical looped network, P2For the active power in electrical loop grid, S2For electricity
Apparent energy in gas loop grid.
5. method as claimed in claim 4, which is characterized in that step S4 judges whether control parameter accords with according to parameter preset
Conjunction requires to include:
When power plant's power output controlling value is less than or equal to power plant unit capacity, and it is less than or equal to when daily trading planning power generating value
When maximum value, step S5 is executed;
When load control system value is less than or equal to main transformer capacity, step S5 is executed;
When power flowcontrol limiting value is less than or equal to the power flow control limiting value in looped network in looped network, step S5 is executed.
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CN110336378B (en) * | 2019-07-10 | 2023-06-27 | 云南电网有限责任公司电力科学研究院 | Power distribution network operation monitoring method based on holographic image technology |
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