CN109217282A - A kind of system and method for determining main transformer circulation operating parameter - Google Patents
A kind of system and method for determining main transformer circulation operating parameter Download PDFInfo
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- CN109217282A CN109217282A CN201710515751.0A CN201710515751A CN109217282A CN 109217282 A CN109217282 A CN 109217282A CN 201710515751 A CN201710515751 A CN 201710515751A CN 109217282 A CN109217282 A CN 109217282A
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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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- 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
The invention discloses a kind of systems of determining main transformer circulation operating parameter, including initial electric parameter acquisition module, for obtaining the initial electric parameter of transformer substation system；Data preprocessing module calculates main transformer impedance per unit value and combinations of voltages for pre-processing to initial electric parameter；Matrix computing module, for carrying out matrixing processing to main transformer impedance per unit value and combinations of voltages, to obtain calculation of circulating current matrix and be solved；And result export module is visually presented with calculated result for exporting the calculated result of matrix computing module；Wherein, initial electric parameter acquisition module is connect with data preprocessing module, and data preprocessing module is connect with matrix computing module and matrix computing module is connect with result export module.The invention also discloses a kind of methods of determining main transformer circulation operating parameter.It can be directed to different power grid boundaries with system and method for the invention, intelligence quickly and accurately determines main transformer circulation operating parameter.
Description
Technical field
The present invention relates to electric power network technique field, relate more specifically to system and the side of a kind of determining main transformer circulation operating parameter
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.
It, can be because there is electricity when the tap changer no-load voltage ratio of different transformers is inconsistent when more parallel operation of transformers
Pressure difference and electric current is generated in transformer branch, as circulation.Main transformer circulation may will increase main transformer loss and calorific value, to change
The safe operation of depressor impacts, its calculating serve not only as concept feasible Journal of Sex Research in actual electric network engineering according to it
One, and be that dispatching of power netwoks personnel carries out transformer tapping adjustment, voltage-controlled reference in actual operation.The prior art is true
System and method interactivity and the accuracy for determining main transformer circulation operating parameter are poor, and face different calculation of boundary conditions, lead to
With property there are larger defect, lead to inefficiency.
Therefore, this field is badly in need of developing newly, is able to carry out intelligence, fast and accurately determines main transformer circulation operating parameter
Method and system, provide auxiliary for electricity power engineering program decisions, traffic control.
Summary of the invention
The object of the present invention is to provide a kind of systems that can intelligently, quickly and accurately determine main transformer circulation operating parameter
And method.
In the first aspect of the present invention, the present invention provides a kind of systems of determining main transformer circulation operating parameter.The system
System includes:
Initial electric parameter acquisition module, for obtaining the initial electric parameter of transformer substation system；
Data preprocessing module, for obtaining the initial electric parameter from the initial electric parameter acquisition module, and
The initial electric parameter is pre-processed, main transformer impedance per unit value and combinations of voltages are calculated；
Matrix computing module, for the main transformer impedance per unit value and combinations of voltages progress square to the data preprocessing module
Array processing, to obtain calculation of circulating current 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 acquisition module is connect with the data preprocessing module, the data prediction
Module is connect with the matrix computing module and the matrix computing module is connect with the result export module.
In another preferred example, the system also includes control systems.
The initial electric parameter acquisition module is connect with transformer substation system.
In another preferred example, the result export module is connect with the control system.
In another preferred example, the control system is connect with the transformer substation system.
In another preferred example, the initial electric parameter acquisition module further includes the connection of data manual input module.
In another preferred example, the system also includes result display modules.
In another preferred example, the result export module is connect with the result display module.
In the second aspect of the present invention, the present invention provides a kind of methods of determining main transformer circulation operating parameter.
It 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 down
Group: main transformer number of units, transformer allow voltage difference, high-pressure side working voltage, the main transformer tap gear number, tap unit tune of paired running
Section ratio, capacity and high middle impedance；
(b) the initial electric parameter is pre-processed, pretreatment obtains following data: main transformer impedance per unit value and electricity
Pressure combination；
(c) matrixing processing is carried out to the main transformer impedance per unit value and combinations of voltages, obtains calculation of circulating current matrix；And
(d) it is calculated by the calculation of circulating current matrix and meets the main transformer circulation operating parameter for allowing paired running, it is described
Main transformer circulation operating parameter includes: main shift combination, combinations of voltages and/or the circulation value for meeting condition.
The calculation of circulating current matrix is expressed from the next:
XI=Δ U
Wherein, X is impedance matrix,
Δ U is voltage matrix,
I is circulation matrix to be asked.
Each element X in the impedance matrix XijIs defined as:
Wherein, i, j=1~N, N are main transformer number of units.
Each element Δ U in the voltage matrix Δ UiIs defined as:
Wherein, i=1~N, N are main transformer number of units.
No-load voltage ratio difference between any two main transformers of transformer substation system is no more than ± 0.5%.
In another preferred example, the high-pressure side working voltage is actual motion voltage.The substation of different regions is practical
Voltage level difference, determines and is converted when main transformer circulation operating parameter with actual motion voltage, calculated result is more quasi-
Really.
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 a kind of system structure diagram of determining main transformer circulation operating parameter of the invention.
Specific embodiment
The present inventor after extensive and in-depth study, develops a kind of quick and precisely determining main transformer circulation operation ginseng for the first time
Several method and systems.Present invention seek to address that: the circulation problem occurred for parallel running transformer under various power grid boundaries,
Carry out intelligence, fast and accurately calculation of circulating current and direct result export, for electricity power engineering program decisions, traffic control provide according to
According to.
The present invention is completed on this basis.
Term
Herein, " main transformer " and " main transformer " is used interchangeably, and refers to generator step-up transformer,
Abbreviation GSU transformer or GSU, function are exactly the transformer for passing through required equal level power supplies for system.
As used herein, when term " main transformer circulation " refers to more parallel operation of transformers, when the pressure regulation of different transformers is taken out
It, can be because of the electric current generated there are voltage difference and on transformers connected in parallel branch road when head no-load voltage ratio is inconsistent.
As used herein, term " main transformer tap ", which refers to, commonly uses the method for changing umber of turn to adjust input voltage and output
The relationship of voltage.
As used herein, term " main transformer impedance per unit value " refers to that main transformer impedance refers to the impedance of the winding of coil in transformer,
Main transformer impedance per unit value refers to the reference voltage and capacity of main transformer impedance conversion to system.
Main advantages of the present invention include:
(a) method of determination main transformer circulation operating parameter of the invention has standby good versatility, expansibility and intelligence
It can property；
(b) method of the invention can be directed to different power grid boundaries, and intelligence quickly and accurately determines the operation of main transformer circulation
Parameter provides scientific basis for electricity power engineering, traffic control；
(c) system of determination main transformer circulation operating parameter of the invention can intuitively export main transformer circulation operating parameter, be
Network operation personnel bring convenience.
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, a kind of system structure diagram of determining main transformer circulation operating parameter of the present invention.The system includes:
Initial electric parameter acquisition module, for obtaining the initial electric parameter of transformer substation system；Data preprocessing module is used for from institute
It states initial electric parameter acquisition module and obtains the initial electric parameter, and the initial conditions are pre-processed, calculate main transformer
Impedance per unit value and combinations of voltages；Matrix computing module is used for from the data preprocessing module main transformer impedance per unit value and electricity
Pressure combination, to calculation of circulating current matrix and be solved；And result export module, based on by the matrix computing module
Result export is calculated, calculated result is visually presented with；Wherein, the initial electric parameter acquisition module and the data prediction
Module connection, the data preprocessing module connect with the matrix computing module and the matrix computing module with it is described
As a result export module connects.The system also includes control system, the initial electric parameter acquisition module and transformer substation system
Connection, the result export module are connect with the control system, for transmitting calculated result to the control system；The control
System processed is connect with the transformer substation system, for feeding back calculated result to the transformer substation system.
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 initial electric parameter is as follows:
#1, #2 main transformer (before transformation): high/middle side tap voltage rating 500kV/230kV ± 9 × 1.33%, high middle impedance
It is 14%；
#1, #2 main transformer (after transformation): high/middle side tap voltage rating is 515kV/230kV ± 2 × 2.5%, high middle impedance
It is 22%；
#3, #4 main transformer: high/middle side tap voltage rating is 500kV/230kV ± 2 × 2.5%, and high middle impedance is 16%；
The scheme that this engineering uses #1, #2 main transformer successively to replace, therefore, after this engineering transitional period and completion, which becomes
Power station can have the case where 2~3 kinds of different tap voltage rating main transformer paired runnings, be determined using method and system of the invention
Main transformer circulation operating parameter.
N is main transformer number of units, and M is the combinations of voltages quantity for meeting setting parallel running condition.
Initial electric parameter is pre-processed, main transformer impedance per unit value and combinations of voltages are obtained:
Obtaining transformer allows paired running voltage difference, high-pressure side working voltage and the specified tap of main transformer, is located in advance
Reason, obtains M group medium voltage side combinations of voltages array [Ui]m, i.e. acquisition voltage matrix △ U；
Obtain main transformer capacity [Si] and senior middle school impedance value [xi], it carries out pretreatment and obtains high middle impedance per unit value [xi*]。
Matrixing is carried out on this basis, forms calculation of circulating current matrix XI=△ U；X is impedance matrix, and △ U is voltage square
Battle array, I are circulation matrix to be asked,
Each matrix is defined as follows:
Wherein, i, j=1~N.
Each element Δ U in the voltage matrix Δ UiIs defined as:
Wherein, i=1~N.
Calculation of circulating current matrix XI=△ U is as follows:
Calculated result is as shown in table 1.
1 calculation of circulating current result of table
(1) foundation is provided for engineering proposal feasibility
From the perspective of main transformer circulation, engineering proposal and transition scheme are feasible, there are it is a variety of meet paired running requirement,
The tap of safe operation combines, and circulation is in reduced levels；
(2) tap changer selects
To avoid former main transformer tap changer position from adjusting, the original side 220kV working voltage is maintained, it is proposed that this engineering replaces transition
After period and completion, the gear of replacement main transformer tap is placed on 2 grades.
It is analyzed according to above embodiments, method of the invention, can be more acurrate, efficiently determine main transformer circulation operating parameter,
It has 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 main transformer circulation operating parameter, which is characterized in that the system comprises
Initial electric parameter acquisition module, for obtaining the initial electric parameter of transformer substation system；
Data preprocessing module, for obtaining the initial electric parameter from the initial electric parameter acquisition module, and to institute
It states initial electric parameter to be pre-processed, calculates main transformer impedance per unit value and combinations of voltages；
Matrix computing module, for the main transformer impedance per unit value and combinations of voltages progress matrixing to the data preprocessing module
Processing, to obtain calculation of circulating current 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 acquisition module is connect with the data preprocessing module, the data preprocessing module
It is connect with the matrix 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.
3. the system as claimed in claim 1, which is characterized in that the initial electric parameter acquisition module and transformer substation system connect
It connects.
In another preferred example, the result export module is connect with the control system.
In another preferred example, the control system is connect with the transformer substation system.
4. the system as claimed in claim 1, which is characterized in that the initial electric parameter acquisition module further includes that data are manual
Input module connection.
5. the system as claimed in claim 1, which is characterized in that the system also includes result display modules.
In another preferred example, the result export module is connect with the result display module.
6. a kind of method of determining main transformer circulation operating parameter, 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, transformer allow voltage difference, high-pressure side working voltage, main transformer tap gear number, the tap unit of paired running to adjust
Ratio, capacity and high middle impedance；
(b) the initial electric parameter is pre-processed, pretreatment obtains following data: main transformer impedance per unit value and voltage group
It closes；
(c) matrixing processing is carried out to the main transformer impedance per unit value and combinations of voltages, obtains calculation of circulating current matrix；And
(d) it is calculated by the calculation of circulating current matrix and meets the main transformer circulation operating parameter for allowing paired running, the main transformer
Circulation operating parameter includes: main shift combination, combinations of voltages and/or the circulation value for meeting condition.
7. method as claimed in claim 6, which is characterized in that the calculation of circulating current matrix is expressed from the next:
XI=Δ U
Wherein, X is impedance matrix,
Δ U is voltage matrix,
I is circulation matrix to be asked.
8. the method for claim 7, which is characterized in that each element X in the impedance matrix XijIs defined as:
Wherein, i, j=1~N, N are main transformer number of units.
9. the method for claim 7, which is characterized in that each element Δ U in the voltage matrix Δ UiIs defined as:
Wherein, i=1~N, N are main transformer number of units.
10. method as claimed in claim 6, which is characterized in that the no-load voltage ratio between any two main transformers of transformer substation system
Difference is no more than ± 0.5%.
In another preferred example, the high-pressure side working voltage is actual motion voltage.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110568249A (en) * | 2019-10-18 | 2019-12-13 | 国网江苏省电力有限公司盐城供电分公司 | parallel power transformer monitoring system based on circulating current detection and monitoring method thereof |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120150497A1 (en) * | 2010-12-10 | 2012-06-14 | Hongbo Sun | Power Flow Analysis for Balanced Power Distribution Systems |
| CN102761128A (en) * | 2011-04-25 | 2012-10-31 | 河海大学 | On-line coordinated automatic control method for economical operation and reactive power optimization of transformer |
| US20120283967A1 (en) * | 2009-09-25 | 2012-11-08 | Beijing Sifang Engineering Co., Ltd. | State-matrix-independent dynamic process estimation method in real-time for weakly observable measurement nodes without pmu |
| CN103323742A (en) * | 2013-05-31 | 2013-09-25 | 华北电力大学 | System and method for grid fault identification based on random point distribution PMU |
| CN105160058A (en) * | 2015-07-10 | 2015-12-16 | 国网四川省电力公司电力科学研究院 | Network boundary equivalence method for electromagnetic transient calculation of power grid |
| CN105391057A (en) * | 2015-11-20 | 2016-03-09 | 国家电网公司 | GPU thread design method of power flow Jacobian matrix calculation |
| KR20160036883A (en) * | 2014-09-26 | 2016-04-05 | 한국전력공사 | Device for voltage stabilization of power distribution systems |
| EP3098924A1 (en) * | 2015-05-29 | 2016-11-30 | Electricité de France | A method and device for calculation of power flow in the distribution grid |
| CN106651189A (en) * | 2016-12-27 | 2017-05-10 | 广东电网有限责任公司惠州供电局 | Transformer state evaluation method based on multilayer compound rule |
| CN206878461U (en) * | 2017-06-29 | 2018-01-12 | 中国电力工程顾问集团华东电力设计院有限公司 | A kind of system for determining main transformer circulation operational factor |
-
2017
- 2017-06-29 CN CN201710515751.0A patent/CN109217282A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120283967A1 (en) * | 2009-09-25 | 2012-11-08 | Beijing Sifang Engineering Co., Ltd. | State-matrix-independent dynamic process estimation method in real-time for weakly observable measurement nodes without pmu |
| US20120150497A1 (en) * | 2010-12-10 | 2012-06-14 | Hongbo Sun | Power Flow Analysis for Balanced Power Distribution Systems |
| CN102761128A (en) * | 2011-04-25 | 2012-10-31 | 河海大学 | On-line coordinated automatic control method for economical operation and reactive power optimization of transformer |
| CN103323742A (en) * | 2013-05-31 | 2013-09-25 | 华北电力大学 | System and method for grid fault identification based on random point distribution PMU |
| KR20160036883A (en) * | 2014-09-26 | 2016-04-05 | 한국전력공사 | Device for voltage stabilization of power distribution systems |
| EP3098924A1 (en) * | 2015-05-29 | 2016-11-30 | Electricité de France | A method and device for calculation of power flow in the distribution grid |
| CN105160058A (en) * | 2015-07-10 | 2015-12-16 | 国网四川省电力公司电力科学研究院 | Network boundary equivalence method for electromagnetic transient calculation of power grid |
| CN105391057A (en) * | 2015-11-20 | 2016-03-09 | 国家电网公司 | GPU thread design method of power flow Jacobian matrix calculation |
| CN106651189A (en) * | 2016-12-27 | 2017-05-10 | 广东电网有限责任公司惠州供电局 | Transformer state evaluation method based on multilayer compound rule |
| CN206878461U (en) * | 2017-06-29 | 2018-01-12 | 中国电力工程顾问集团华东电力设计院有限公司 | A kind of system for determining main transformer circulation operational factor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110568249A (en) * | 2019-10-18 | 2019-12-13 | 国网江苏省电力有限公司盐城供电分公司 | parallel power transformer monitoring system based on circulating current detection and monitoring method thereof |
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