CN109286185A - A kind of system and method for determining substation's net capability - Google Patents
A kind of system and method for determining substation's net capability Download PDFInfo
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- CN109286185A CN109286185A CN201710591347.1A CN201710591347A CN109286185A CN 109286185 A CN109286185 A CN 109286185A CN 201710591347 A CN201710591347 A CN 201710591347A CN 109286185 A CN109286185 A CN 109286185A
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- 238000007781 pre-processing Methods 0.000 claims abstract description 11
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Classifications
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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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- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
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Abstract
The invention discloses a kind of systems of determining substation's net capability.The system includes that initial electric parameter provides module, for providing the initial electric parameter of transformer substation system；Data preprocessing module calculates high middle impedance per unit value, and remove the minimum value of high middle impedance per unit value for pre-processing to initial electric parameter；Net capability computing module, for calculating the net capability value of transformer substation system；Matrix computing module, for the net capability value and the progress matrixing processing of high middle impedance per unit value to transformer substation system, to obtain net capability calculating matrix and be solved；And result export module is visually presented with calculated result for exporting the calculated result of matrix computing module.The invention also discloses a kind of methods of determining substation's net capability.System and method of the invention have good versatility, expansibility and intelligence, can effectively promote computational efficiency.
Description
Technical field
The present invention relates to electric power network technique field, relate more specifically to a kind of determining substation's net capability system and
Method.
Background technique
The overall development of " 13 " initial stage load slows down, and stage tends to be saturated for the development of power grid scale, power transmission and transformation work
The center of gravity of journey is gradually by " newly-built " steering " increase-volume ", " enlarging ", " transformation " etc., it means that transition period will occur for electricity power engineering
The variation such as complication, engineering quantity increase, engineering construction cycle time, this accuracy, professional, versatility to system-computed
And computational efficiency will face higher requirement.
When more parallel operation of transformers, it is possible that the case where power that different transformers are undertaken is unevenly distributed,
Longtime running not only has an impact to bulk supply ability, but also is unfavorable for the economy of equipment, safe operation, and equipment component utilizes
Rate is relatively low or higher.Therefore, substation's net capability calculates, and can not only be the side of all kinds of projects of transmitting and converting electricity in Electric Power Network Planning
Case feasibility study provides scientific basis, and can measure the load supply-demand mode degree of engineering transition period, and auxiliary is formulated
The schemes such as construction, the power failure of transition period.
The traditional method of presently relevant kiowatt, not only interactivity and accuracy are poor, and face different calculating boundaries
Condition, versatility lead to inefficiency there are larger defect.
Therefore, this field is badly in need of developing a kind of system that intelligently can rapidly and accurately determine substation's net capability
And method.
Summary of the invention
The object of the present invention is to provide provide it is a kind of can quickly and intelligently determine substation's net capability be
System and method.
In the first aspect of the present invention, the present invention provides a kind of systems of determining substation's net capability.It is described
System includes:
Initial electric parameter provides module, for providing the initial electric parameter of transformer substation system；
Data preprocessing module, the initial electric parameter for providing module to the initial electric parameter are located in advance
Reason, calculates high middle impedance per unit value, and remove the minimum value of high middle impedance per unit value；
Net capability computing module, for calculating the net capability value of transformer substation system；
Matrix computing module, for the net capability value and high middle impedance per unit value progress matrix to transformer substation system
Change processing, to obtain net capability calculating matrix and be solved；And
As a result export module is visually presented with calculating knot for exporting the calculated result of the matrix computing module
Fruit；
Wherein, the initial electric parameter provides module and the data preprocessing module and the net capability
Computing module connection, the data preprocessing module and the matrix computing module and the net capability computing module connect
It connects and the matrix computing module is connect with the result export module.
In another preferred example, the system also includes control systems.
Preferably, the control system is connect with transformer substation system.
Preferably, the control system is connect with the result export module.
Preferably, the initial electric parameter provides module and connect with transformer substation system.
In another preferred example, it further includes data manual input module that the initial electric parameter, which provides module,.
In another preferred example, the system also includes result display modules.
Preferably, the result display module is display；
Preferably, the result export module is connect with result display module.
In the second aspect of the present invention, the present invention provides a kind of methods of determining substation's net capability.It is described
Method the following steps are included:
(a) transformer substation system is provided, obtains the initial electric parameter of the system, the initial electric parameter is selected from down
Group: main transformer number of units, allows overload magnification, main transformer capacity and senior middle school's impedance value at power factor；
(b) the initial electric parameter is pre-processed, and obtains high middle impedance per unit value；
(c) the net capability value of transformer substation system is calculated；
(d) the net capability value of the high middle impedance per unit value and the transformer substation system is carried out at matrixing
Reason obtains net capability calculating matrix XP=P,；And
(e) power that every main transformer undertakes is calculated according to the net capability calculating matrix；
Wherein, X is impedance matrix, and P is substation's maximum power matrix, and P is main transformer power distribution matrix to be asked.
It preferably, further include the minimum value for removing the high middle impedance per unit value in step (b).
Each element is defined as follows in the impedance matrix X:
Wherein, i, j=1~N, N are main transformer number of units.
Substation's maximum power matrix P, middle each element are defined as follows:
Wherein, i, j=1~N, N are main transformer number of units.
The net capability value of substation is calculated according to following principles:
One main transformer N-1 method of operation, remaining main transformer certain multiple overload, and consider main transformer power and impedance at anti-simultaneously
The principle of ratio.
The net capability value of the transformer substation system calculates according to the following formula:
Wherein, Pmax is the net capability value of substation,
xmin=min [xi], [xi] it is the impedance array removed after the smallest main transformer of impedance per unit value,
K is to allow overload magnification,
Cos θ is power factor,
SiFor main transformer capacity,
xiFor senior middle school's impedance value,
I=1~N-1, N are main transformer number of units.
The net capability calculating matrix XP=P, representation are as follows:
Wherein, xi*For high middle impedance per unit value, i=1~N-1, N are main transformer number of units.
It should be understood that above-mentioned each technical characteristic of the invention and having in below (eg embodiment) within the scope of the present invention
It can be combined with each other between each technical characteristic of body description, to form a new or preferred technical solution.As space is limited, exist
This no longer tires out one by one states.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the system of determination net capability of the invention.
Specific embodiment
The present inventor after extensive and in-depth study, develop for the first time it is a kind of for different calculating boundaries, can intelligently,
Quickly and accurately determine the system and method for substation's net capability.It aims to solve the problem that: for power transformation under different power grid boundaries
The internal power occurred of standing is unevenly distributed the problem being limited with bulk supply ability, carries out intelligence, fast and accurately calculates and straight
Result export is seen, provides scientific basis for electricity power engineering concept feasible Journal of Sex Research, the allotment of network operation personnel's load.
When more parallel operation of transformers, when the impedance of different transformers or inconsistent capacity, transformer etc. will cause
It is inconsistent (x1 ≠ x2 ≠ x3) to imitate impedance, be unevenly distributed so as to cause the power that different transformers are undertaken (IL1 ≠ IL2 ≠
IL3 on the one hand) the case where, therefore need to carry out substation's net capability calculating, can be planned, to deploy substation's band negative
Lotus, in the case where guaranteeing any one main transformer failure or maintenance, which carries out load transfer or excision without instantaneous；Separately
On the one hand the ratio of different the undertaken power of main transformer can be measured, it is convenient that the utilization rate of equipment is examined.
It is a primary object of the present invention to: the method for proposing the determination substation net capability of a set of matrixing,
For different calculating boundaries, direct result intelligently, fast and accurately can be calculated and be exported, is electricity power engineering scheme
Feasibility study, the allotment of network operation personnel's load provide scientific basis.
The present invention is completed on this basis.
Term
As used herein, term " substation's net capability " refers to when a substation possesses more main transformers, refers to this
The maximum power that should bear in the reasonable situation of substation can when the practical institute's on-load of substation is no more than net capability
In the case where guaranteeing any one main transformer failure or maintenance, which carries out load transfer or excision without instantaneous.
As used herein, term " the N-1 method of operation " refers to that any one independent component in N number of element of electric system is sent out
Raw failure and after being removed, should not cause to trip because of other equipment overload two causes user to have a power failure；The stabilization of system is not destroyed
Property, do not occur the accidents such as collapse of voltage.
Main advantages of the present invention include:
(a) method and system of determination substation net capability of the invention can be with for different calculating boundaries
Intelligence is fast and accurately calculated and is exported direct result, is electricity power engineering concept feasible Journal of Sex Research, network operation personnel
Load allotment provides scientific basis；
(b) method of the invention has good versatility, expansibility and intelligence, can effectively promote calculating effect
Rate.
Determine that the method flow of substation's net capability is as follows, wherein N is main transformer number of units.
(1) main transformer impedance per unit value is calculated according to different input datas；
(2) according to 1 main transformer N-1, remaining main transformer certain multiple overload, and consider that main transformer power and impedance are inversely proportional simultaneously
Principle, calculate the net capability Pmax of substation；
(3) matrixing is carried out on this basis, forms net capability calculating matrix XP=P '；X is impedance matrix, P '
For substation's maximum power matrix, P is main transformer power distribution matrix to be asked.
Each matrix is defined as follows:
I, j=1~N
It can make method of the invention that there is good versatility input information matrixization, suitable for different calculating sides
Boundary's condition.
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.
It should be noted that in the claim and specification of this patent, such as first and second or the like relationship
Term is only used to distinguish one entity or operation from another entity or operation, without necessarily requiring or implying
There are any actual relationship or orders between these entities or operation.Moreover, the terms "include", "comprise" or its
Any other variant is intended to non-exclusive inclusion so that include the process, methods of a series of elements, article or
Equipment not only includes those elements, but also including other elements that are not explicitly listed, or further include for this process,
Method, article or the intrinsic element of equipment.In the absence of more restrictions, being wanted by what sentence " including one " limited
Element, it is not excluded that there is also other identical elements in the process, method, article or apparatus that includes the element.
Embodiment 1
As shown in Figure 1, the structure of the system for a kind of typical determining net capability of the invention.The system packet
Include: initial electric parameter provides module, for providing the initial electric parameter of transformer substation system；Data preprocessing module is used for
The initial electric parameter for providing module to initial electric parameter pre-processes, and calculates high middle impedance per unit value, and remove senior middle school
The minimum value of impedance per unit value；Net capability computing module, for calculating the net capability value of transformer substation system；Square
Battle array computing module, for transformer substation system net capability value and high middle impedance per unit value carry out matrixing processing, from
And it obtains net capability calculating matrix and is solved；And result export module, based on by matrix computing module
Result export is calculated, calculated result is visually presented with；Wherein, initial electric parameter provide module and data preprocessing module and
The connection of net capability computing module, data preprocessing module and matrix computing module and net capability computing module connect
It connects and matrix computing module is connect with result export module.As a result result derived from export module includes the tune of every main transformer
Press voltage gear, voltage value and the circulation of side.
Embodiment 2
Somewhere 500kV substation four main transformers of status, wherein #1, #2 main transformer capacity are 750MVA；#3, #4 main transformer hold
Amount is 1000MVA, this engineering project transform #1, #2 main transformer as 2 × 1200MVA, and each main transformer parameter is as follows:
#1, #2 main transformer (before transformation): high middle impedance is 14%；
#1, #2 main transformer (after transformation): high middle impedance is 22%；
#3, #4 main transformer: high middle impedance is 16%；
This engineering transition period is proposed that two schemes: #1, #2 main transformer remove replacement (scheme one) in turn；#1, #2 main transformer
Remove replacement (scheme two) simultaneously；The maximum power supply of each stage transformer substation system of two schemes is determined using method of the invention
Ability, as a result such as table 1.Load prediction, power supply on the basis of determining net capability, in conjunction with the substation in subregion
Planning, season load coefficient carry out power balance analysis, as a result such as table 2.
1 net capability of table calculates
2 regional power balance unit of account of table: MW
(1) transition scheme selects
The power supply capacity of one transition period of substation's scheme is significantly greater than scheme two, it is proposed that selection scheme one is used as transition
Scheme；
(2) transition period, which has a power failure, plans to arrange
To meet workload demand as far as possible, load transfer amount is reduced, it is proposed that autumn in 2016 starts #1 main transformer power cut construction, until
#1 main transformer is completed in transformation before summer peak in 2017；Autumn in 2017 starts #2 main transformer power cut construction, until being transformed before the peak of summer in 2018
Complete #2 main transformer.
According to the above analysis of project example, method of the invention can be more acurrate, efficient to carry out net capability meter
It calculates, there is good directive significance for sorts of systems conceptual design, decision in practical projects.
All references mentioned in the present invention is incorporated herein by reference, independent just as each document
It is incorporated as with reference to such.In addition, it should also be understood that, after reading the above teachings of the present invention, those skilled in the art can
To make various changes or modifications to the present invention, such equivalent forms equally fall within model defined by the application the appended claims
It encloses.
Claims (10)
1. a kind of system of determining substation's net capability, which is characterized in that the system comprises
Initial electric parameter provides module, for providing the initial electric parameter of transformer substation system；
Data preprocessing module, the initial electric parameter for providing module to the initial electric parameter pre-process, and count
High middle impedance per unit value is calculated, and removes the minimum value of high middle impedance per unit value；
Net capability computing module, for calculating the net capability value of transformer substation system；
Matrix computing module, for transformer substation system net capability value and high middle impedance per unit value carry out matrixing at
Reason, to obtain net capability calculating matrix and be solved；And
As a result export module is visually presented with calculated result for exporting the calculated result of the matrix computing module；
Wherein, the initial electric parameter provides module and the data preprocessing module and the net capability calculates
Module connection, the data preprocessing module are connect with the matrix computing module and the net capability computing module,
And the matrix computing module is connect with the result export module.
2. the system as claimed in claim 1, which is characterized in that the system also includes control systems；
Preferably, the control system is connect with transformer substation system；
Preferably, the control system is connect with the result export module；
Preferably, the initial electric parameter provides module and connect with transformer substation system.
3. the system as claimed in claim 1, which is characterized in that it further includes that data are manual that the initial electric parameter, which provides module,
Input module.
4. the system as claimed in claim 1, which is characterized in that the system also includes result display modules；
Preferably, the result display module is display；
Preferably, the result export module is connect with result display module.
5. a kind of method of determining substation's net capability, which is characterized in that the described method comprises the following steps:
(a) transformer substation system is provided, obtains the initial electric parameter of the system, the initial electric parameter is selected from the group:
Main transformer number of units, allows overload magnification, main transformer capacity and senior middle school's impedance value at power factor；
(b) the initial electric parameter is pre-processed, and obtains high middle impedance per unit value；
(c) the net capability value of transformer substation system is calculated；
(d) matrixing processing is carried out to the net capability value of the high middle impedance per unit value and the transformer substation system, obtained
Obtain net capability calculating matrix XP=P '；And
(e) power that every main transformer undertakes is calculated according to the net capability calculating matrix；
Wherein, X is impedance matrix, and P ' is substation's maximum power matrix, and P is main transformer power distribution matrix to be asked.
6. method as claimed in claim 5, which is characterized in that further include the removal high middle impedance per unit value in step (b)
Minimum value.
7. method as claimed in claim 5, which is characterized in that each element is defined as follows in the impedance matrix X:
Wherein, i, j=1~N, N are main transformer number of units.
8. method as claimed in claim 5, which is characterized in that substation's maximum power matrix P, middle each element definition is such as
Under:
Wherein, i, j=1~N, N are main transformer number of units.
9. method as claimed in claim 5, which is characterized in that the net capability value of the transformer substation system is according to the following formula
It calculates:
Wherein, Pmax is the net capability value of substation,
xmin=min [xi], [xi] it is the impedance array removed after the smallest main transformer of impedance per unit value,
K is to allow overload magnification,
Cos θ is power factor,
SiFor main transformer capacity,
xiFor senior middle school's impedance value,
I=1~N-1, N are main transformer number of units.
10. method as claimed in claim 5, which is characterized in that the net capability calculating matrix XP=P ' indicates shape
Formula is as follows:
Wherein, xi*For high middle impedance per unit value, i=1~N-1, N are main transformer number of units.
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| CN201710591347.1A CN109286185B (en) | 2017-07-19 | 2017-07-19 | System and method for determining maximum power supply capacity of transformer substation |
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| CN201710591347.1A CN109286185B (en) | 2017-07-19 | 2017-07-19 | System and method for determining maximum power supply capacity of transformer substation |
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| CN109286185B CN109286185B (en) | 2024-02-23 |
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| WO2012155494A1 (en) * | 2011-05-16 | 2012-11-22 | 河北省电力研究院 | Verifying method of optimal control parameter in whole network for automatic voltage control system |
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| KR20150111458A (en) * | 2014-03-24 | 2015-10-06 | 서울과학기술대학교 산학협력단 | High-Speed Method for Large Scale Power Systems |
| CN105958429A (en) * | 2016-05-03 | 2016-09-21 | 昆明理工大学 | Single-phase overlapping sequence setting method for reducing power frequency fault component distance protection misoperation rate in AC-DC system |
| CN106505561A (en) * | 2016-11-30 | 2017-03-15 | 国网江苏省电力公司经济技术研究院 | Modeling method of the extra-high voltage alternating current-direct current power transmission in electricity optimization planning |
-
2017
- 2017-07-19 CN CN201710591347.1A patent/CN109286185B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012155494A1 (en) * | 2011-05-16 | 2012-11-22 | 河北省电力研究院 | Verifying method of optimal control parameter in whole network for automatic voltage control system |
| KR20150111458A (en) * | 2014-03-24 | 2015-10-06 | 서울과학기술대학교 산학협력단 | High-Speed Method for Large Scale Power Systems |
| CN104899677A (en) * | 2015-05-06 | 2015-09-09 | 广东工业大学 | Quick estimation method for load maximum reactive power command of 500kv radial power supply network in disruption recovery |
| CN105958429A (en) * | 2016-05-03 | 2016-09-21 | 昆明理工大学 | Single-phase overlapping sequence setting method for reducing power frequency fault component distance protection misoperation rate in AC-DC system |
| CN106505561A (en) * | 2016-11-30 | 2017-03-15 | 国网江苏省电力公司经济技术研究院 | Modeling method of the extra-high voltage alternating current-direct current power transmission in electricity optimization planning |
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