CN1310389C - Fuzzy control method for relay protection of very-high voltage power equipment - Google Patents
Fuzzy control method for relay protection of very-high voltage power equipment Download PDFInfo
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- CN1310389C CN1310389C CNB021131619A CN02113161A CN1310389C CN 1310389 C CN1310389 C CN 1310389C CN B021131619 A CNB021131619 A CN B021131619A CN 02113161 A CN02113161 A CN 02113161A CN 1310389 C CN1310389 C CN 1310389C
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Abstract
The present invention relates to an intelligent reasoning, measuring and controlling method for protection of primary devices of electric power in an electric power system according to real-time parameters of an operation process, which forms a protecting criterion and a controlling outlet, and the present invention belongs to the technical field of the electric power system. The present invention comprises two parts of intelligent measurement and judgment of fuzzy reasoning of electrical quantity of reliable real-time data acquisition and intelligent measurement and control of fuzzy reasoning of non-electrical quantity, and the operating states of the two parts are respectively judged according to a 'three ratio method', wherein the states are judged through a hardware platform of the electrical quantity of reliable real-time acquisition and the electrical quantity of real-time acquisition according to the 'three ratio method' in the intelligent measurement and judgment of fuzzy reasoning; the state value of each non-electrical quantity is measured through a digital analyzer of a primary device and an intelligent measurement and control loop interface, and the state is judged according to the 'three ratio method'. The present invention conducts real-time acquisition of each electrical quantity and each non-electrical quantity through an operation process, and then, the 'three ratio method' is used for determining a normal operation state, a fault warning state and a fault high value state of the device; thus, whether the action tripping and the locking operation which are harmful to the device, such as low voltage locking, side switching, etc., is permitted by an outlet loop or not is carried out. The time of the fuzzy reasoning and the intelligent measurement and control of the electrical quantity of the present invention is quick, which is within 5 ms, the judgment result of fault-tolerant repeated judgment is determined according to n-2/n, and the judgment of.
Description
Technical field
The invention belongs to field of power, particularly the relay protecting method of electric power system high pressure (750KV and more than) main apparatus.
Background technology
Relaying protection is the important component part of electric power system.As high-voltage electric power system, declaring correctly, fast, reliably, delicately of its main apparatus is out of order, and the excision faulty equipment prevents that to system safety operation fault expansion from making main equipment badly damaged is the important indicator of weighing main equipment relaying protection performance quality.Power system main equipment relaying protection at present all is in fault and the back takes place by fault-signal differentiation, the excision fault of walking unhurriedly.This configuration does not make full use of the normal state safety interlocking outlet of the parameter of running, forms factors such as hardware device damage, software inefficacy out of control, electromagnetic interference or partial operation mistake easily and causes equipment operation malfunction and fault to fail to judge, misjudge tripping.The home and abroad actual conditions also prove absolutely because of above-mentioned configuration has considerable influence to equipment operation and system safety.
Summary of the invention
The objective of the invention is for overcoming the weak point of protection configuration of present home and abroad and criterion technology; propose a kind ofly can effectively to prevent erroneous judgement, malfunction, fail to judge, tripping, have very sensitive, fast, the high-tension electricity main equipment relaying protection fuzzy reasoning intelligent monitoring method of security feature.
Technical solution of the present invention:
A kind of high-tension electricity main equipment relaying protection fuzzy reasoning intelligent monitoring method is characterized in that, may further comprise the steps:
A. make full use of real-time data acquisition and processing platform, adopt each electric parameters (electric current, voltage, the 3U of winner's equipment running process
0, 3I
0Deng), declare a n 〉=5;
B. to adopt each data volume and processing (getting power frequency component, secondary, triple-frequency harmonics) back declare synchronously fast by " three-ratio method " and ratio;
C. electric parameters and non-electric quantity are all declared by " three-ratio method " ratio result and each parameter of main equipment running status, the value of declaring determines ternary with (n-2)/n;
D. declare from the ratio of electric parameters and non-electric quantity and three-state, its criterion is:
If each electric parameters (or non-electric quantity) is always declared among the ratio result:
The value of declaring＞(n-2)/the n value is a normal state, then main equipment is judged to be normal state,
The value of declaring＞(n-2)/the n value is for being worth attitude more, and then fault case is given in the main equipment judgement,
The value of declaring＞(n-2)/the n value is the high value attitude of fault, then main equipment is judged to be fault case,
If each electric parameters (or non-electric quantity) is always declared ratio result＜(n-2)/n value, description status is not really declared, and it is fixed to treat to declare again again:
E. utilize " three-ratio method " decision state of each amount to declare again with the relevant protection of relaying protection, whether would trip of outlet loop is protected in decision, and its comprehensive criterion is:
As will each amount " three-ratio method " result being fault, then export would trip with protecting result of determination consistent;
If declaring with protection, each amount " three-ratio method " result the warning value for consistent, then give a warning also some damage property operations of locking, operation, and out of service in good time;
If each amount " three-ratio method " result is a normal state, the locking outlet loop; As inconsistent, add to declare again again and decide with protection " normal state ".
The present invention adopts main apparatus running parameter real time monitoring with the intelligent monitoring method configuration superhigh pressure of fuzzy reasoning method and the main equipment relaying protection of above electric power system; the real-time acquisition technique of high-speed data of high pressure main equipment relaying protection is used in configuration of the present invention; the synchronous digital signal treatment technology is undertaken by fuzzy reasoning " three-ratio method " to real time data that wink is declared simultaneously and rapidly; the number that to gather in real time is by " normal state "; " attitude overflows "; " fault high value attitude " located and is defeated by " numerical control outlet loop " and declare again in order to the relaying protection of electric pressures at different levels, and the main apparatus that is specially adapted to superhigh pressure and above electrical voltage system is (as transformer; shunt reactor etc.) in the protection configuration.The present invention also adapts to high-pressure system main apparatus device, with differential mode gas (H in winding temperature, the gentle oil of insulating oil
2, CH
4, C
2H
2, C
2H
4, C
2H
6, CO, CO
2) monitoring in real time and fuzzy reasoning judgement, cooperate with electric parameters " three-ratio method " can effectively prevent erroneous judgement, malfunction, fail to judge, tripping, especially equipment is given fault and has very sensitive, quick, safe advantage by the reasoning intelligent monitoring.
The present invention can reach following performance index:
(1) makes full use of data acquisition and real-time processing platform, each electric parameters is gathered fast, handled, by " three-ratio method " value of declaring time＜5ms;
(2) control outlet loop by " three-ratio method " value of declaring result, can prevent effectively that electromagnetic interference and some relay protection circuit malfunctions from causing malfunction outlet tripping operation or causing the tripping of failing to judge of malfunction or fault because of hardware device damages, software is out of control, reliability be improved cut much ice;
(3) differentiate effectively locking value alarm attitude reclosing etc. more of locking equipment run mode from electric parameters, non-electric quantity in conjunction with " three-ratio method ", to protection give thus in earlier stage equipment, move back O﹠M in good time and protect device security and play fine effect.
The inventive method is applicable to each step voltage, especially the relaying protection of high pressure (750KV and more than) power equipment (transformer, shunt reactor).
Description of drawings
Fig. 1 is membership function " three-ratio method " curve chart.
Fig. 2 is a principle of the invention block diagram.
Fig. 3 is a differential mode gas identification BP network diagram in the oil.
Fig. 4 declares the principle assumption diagram that does well for state parameter through hidden neuron.
Embodiment
High-tension electricity main equipment relaying protection fuzzy reasoning intelligent monitoring method of the present invention is characterized in that may further comprise the steps:
(1) digitlization that is provided with by the main equipment relaying protection gather in real time and processing platform as public data, each parameter of running status is entered the intelligent monitoring loop in real time;
(2) disposed gaseous state monitoring device and " three-ratio method " digital assay instrument in winding temperature, insulating oil temperature and the oil as main equipment, the same input intelligent monitoring of each parameter ratio attitude loop has been participated in declare again;
(3) carry out reasoning and judging and integrated and " numerical control outlet loop " interface, every group of n value 〉=5 for electric parameters, treated press " three-ratio method " of non-electric quantity;
(4) " three-ratio method " ratio is judged normal state, the attitude that overflows, the high value attitude of fault, declare and that the operation shape belongs to normal operation, gives age at failure, the fault emergence period, its criterion is: divide two groups of parameters to declare again electric parameters, non-electric quantity, the value of declaring is judged above-mentioned three-state by (n-2)/n value, for example:
In the n electric parameters＞(n-2) for normal, give so, fault case, then declare respectively locking and export, send out a warning signal, start outlet;
In the n non-electric quantity＞and (n-2) item is normally, gives event, fault case, declare equally locking, alarm, startup outlet, but non-electric quantity lags behind relatively slightly;
(5) real-time (being mainly electric parameters) declared again by other protection of " three-ratio method " judgement master status and relaying protection in the utilization " fuzzy reasoning intelligent monitoring method ", and outlet loop is protected in control.
The present invention proposes the requirement of main apparatus reliability of relay protection that relaying protection fuzzy reasoning intelligent monitoring method adapts to high-voltage electric power system, rapidity, judgement fault.Fuzzy reasoning intelligent monitoring method of the present invention is that the basis is undertaken quick wink of each value is declared by reasoning " three-ratio method " in real time with fuzzy theory to the electric parameters of running and the real-time high-precision image data of non-electric quantity; Fig. 1 is membership function " three-ratio method " curve chart; with each electric parameters of main apparatus of running and " normal state " in non-electric quantity and the membership function curve; " be worth attitude more "; " the high value of fault attitude " compares in real time; determine each value state of living in; combine a certain attitude, effectively start and locking outlet and the signal circuit that determining apparatus is in three-state with relaying protection by declaring scheme again.
Fig. 2 is the invention process block diagram, and voltage U, electric current I are measured, gathered for each electric parameters and a whole set of protection and to handle corresponding each electric weight in real time public, state under judging by " three-ratio method " inference rule; The differential mode gas content is surveyed to analyse also through sensitivity and is judged state of living in by fuzzy reasoning in main equipment winding temperature, oil temperature, the oil, implements the run mode of determining apparatus effectively through the block diagram of Fig. 2.
Fig. 3 is a gaseous state monitoring device fit structure schematic diagram in digital assay instrument and the oil, declares by real-time reasoning in this BP network diagram.
Fig. 4 combines with Fig. 3 to differentiate the neural hidden layer Principles of Network of fixed each non-electric quantity institute run mode structure, with each non-electric quantity input synchronously relatively.
The present invention adopts parameter, associated electrical tolerance and non-electric quantity in the complete equipment protective device into formation intelligent monitoring method; it is a kind of anti-error way that improves equipment operation safety, compensation relay protected operation process generation differential mode; can be widely used in various electric pressures, the main apparatus protective device, come down to one of intelligent backup protection according to each electric weight and the non electrical quantity amount of adopting structure.
Claims (1)
1, a kind of high-tension electricity main equipment relaying protection fuzzy reasoning intelligent monitoring method is characterized in that, may further comprise the steps:
Make full use of real-time data acquisition and processing platform, adopt each electric parameters of winner's equipment running process and declare a n 〉=5;
To adopt each data volume and handle the back and declare synchronously fast by " three-ratio method " and ratio;
Electric parameters and non-electric quantity all declared by " three-ratio method " ratio result each parameter of main equipment running status, the value of declaring determines ternary with (n-2)/n;
Determine three-state from the ratio of electric parameters and non-electric quantity, its criterion is:
If each electric parameters or non-electric quantity are always declared among the ratio result:
The value of declaring＞(n-2)/the n value is a normal state, then main equipment is judged to be normal state,
The value of declaring＞(n-2)/the n value is for being worth attitude more, and then fault case is given in the main equipment judgement,
The value of declaring＞(n-2)/the n value is the high value attitude of fault, then main equipment is judged to be fault case,
If each electric parameters or non-electric quantity are always declared ratio result＜(n-2)/n value, description status is not really declared, and it is fixed to treat to declare again again:
Utilize " three-ratio method " decision state of each amount to declare again with the relevant protection of relaying protection, whether would trip of outlet loop is protected in decision, and its comprehensive criterion is:
As will each amount " three-ratio method " result being fault, then export would trip with protecting result of determination consistent;
If declaring with protection, each amount " three-ratio method " result the warning value for consistent, then give a warning also some damage property operations of locking, operation, and out of service in good time;
If each amount " three-ratio method " result is a normal state, the locking outlet loop; As inconsistent, add to declare again again and decide with protection " normal state ".
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021131619A CN1310389C (en) | 2002-06-02 | 2002-06-02 | Fuzzy control method for relay protection of very-high voltage power equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021131619A CN1310389C (en) | 2002-06-02 | 2002-06-02 | Fuzzy control method for relay protection of very-high voltage power equipment |
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| Publication Number | Publication Date |
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| CN1399383A CN1399383A (en) | 2003-02-26 |
| CN1310389C true CN1310389C (en) | 2007-04-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB021131619A Expired - Lifetime CN1310389C (en) | 2002-06-02 | 2002-06-02 | Fuzzy control method for relay protection of very-high voltage power equipment |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100356650C (en) * | 2005-08-26 | 2007-12-19 | 清华大学 | Intelligent data collecting and overvoltage protective system for high and medium voltage power device |
| CN101692113B (en) * | 2009-10-12 | 2012-05-23 | 天津大学 | Method for diagnosing fault of power transformer on the basis of interval mathematical theory |
| CN104849541B (en) * | 2015-05-14 | 2018-02-23 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of method for realizing voltage measurement abnormality detection in DC protection system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2206510Y (en) * | 1994-08-29 | 1995-08-30 | 云梦县电力科技开发公司 | Comprehensive logical judge relay protector for transformer substation |
| CN2368206Y (en) * | 1999-04-21 | 2000-03-08 | 国家电力公司南京电力自动化设备总厂 | Microcomputor delay protection device for power equipment |
-
2002
- 2002-06-02 CN CNB021131619A patent/CN1310389C/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2206510Y (en) * | 1994-08-29 | 1995-08-30 | 云梦县电力科技开发公司 | Comprehensive logical judge relay protector for transformer substation |
| CN2368206Y (en) * | 1999-04-21 | 2000-03-08 | 国家电力公司南京电力自动化设备总厂 | Microcomputor delay protection device for power equipment |
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| CN1399383A (en) | 2003-02-26 |
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Owner name: NANJING GUODIAN NANJING GRID AUTOMATION CO., LTD. Free format text: FORMER OWNER: NANJING AUTOMATION CO., LTD., CHINA ELECTRONICS CORP. Effective date: 20121129 |
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Effective date of registration: 20121129 Address after: 211100 No. 8 SIEMENS Road, Jiangning Development Zone, Nanjing, Jiangsu Patentee after: Nanjing Guodian Nanjing Grid Automation Co., Ltd. Address before: 210003, No. 38, new exemplary Road, Nanjing, Jiangsu Patentee before: Nanjing Automation Co., Ltd., China Electronics Corp. |
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Granted publication date: 20070411 |