CN103050949B - Calculation method for relay protection fixed value backup protection range - Google Patents
Calculation method for relay protection fixed value backup protection range Download PDFInfo
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- CN103050949B CN103050949B CN201210434994.9A CN201210434994A CN103050949B CN 103050949 B CN103050949 B CN 103050949B CN 201210434994 A CN201210434994 A CN 201210434994A CN 103050949 B CN103050949 B CN 103050949B
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Abstract
The invention discloses a calculation method for a relay protection fixed value backup protection range. The calculation method has the advantages of capabilities of realizing full consideration and determining and calculating in real time according to a specific condition. The calculation method comprises the following steps of: (1) traversing lines included by a substation, acquiring a line set (2) provided with corresponding backup protection and extracting one line which is not subjected to calculation from the set as an analysis object; (3) judging whether a next stage of line is a double-circuit line or not, executing a step (4) if the next stage of line is a double-circuit line, and otherwise executing a step (6); (4) judging whether the next stage of line is the double-circuit line and power sources are arranged on the two sides or not, executing a step (5) if the next stage of line is the double-circuit line and power sources are arranged on the two sides, and otherwise executing the step (6); (5) calculating according to a fixed step size approximation method and jumping to a step (7); (6) calculating according to a dichotomy method; (7) determining the relay protection fixed value backup protection range; (8) judging whether all the lines in the substation are calculated or not, executing a step (9) if all the lines in the substation are calculated, and otherwise executing the step (2); and (9) ending.
Description
Technical field
The present invention relates to the adaptive setting of relay protection of power system, particularly relate to a kind of computational methods of relay protection constant value backup protection scope.
Background technology
The backup protection of electric power system is one protection indispensable in power system main equipment.In order to excise the protection of fault when the effect of backup protection is other links damage in protective device tripping, protective loop, circuit breaker tripping, working power are abnormal and even the situation such as disappearance occurs, to reach, electric power accident is controlled the object in scope little as far as possible.
The protection seting of current power system calculates and has achieved automation and intellectuality, and various Relay Protection Setting Calculation System obtains a wide range of applications.But the adaptive setting system of current application is in the protection range problem of backup protection, and there are the following problems:
1) backup protection scope is considered not enough: current adaptive setting system is only rely on setting principle to calculate definite value for the consideration of backup protection, does not substantially all consider the protection range of backup protection.This makes protection personnel not be familiar with intuitively for the protection range of protection, the matching relationship protected directly may be caused to have problems, affect the reliability of electric power system.
2) setting principle is depended on unduly: the definite value of relaying protection all adjusts out by setting principle; and the formulation of setting principle is professional is formulated by experience; and setting principle is in order to meet versatility, some adaptive setting in particular cases can not be considered.At some in particular cases, actual protection range may have deviation with expection.
3) the backup protection scope of real-time mode can not be obtained: traditional relay protection system is all off-line, thus cannot realize the calculating of protection range for the current electrical network run in real time fashion.
Summary of the invention
For overcoming the defect of prior art, the technical problem to be solved in the present invention there is provided the computational methods of relay protection constant value backup protection scope a kind ofly can considered comprehensively, to determine as the case may be, calculate in real time.
Technical scheme of the present invention is: the computational methods of this relay protection constant value backup protection scope, comprise the following steps:
(1) travel through circuit contained by plant stand, obtain the line set of the corresponding backup protection of configuration;
(2) circuit not carrying out calculating in extraction line set is as analytic target;
(3) judge whether subordinate's circuit is double-circuit line, subordinate's circuit be not the carrying out of step (2) the next stage circuit of a circuit calculated, be perform step (4), otherwise perform step (6);
(4) judge whether subordinate's circuit is double loop and all there is power supply both sides, is, perform step (5), otherwise perform step (6);
(5) calculate according to fixed step size approach method, jump procedure (7);
(6) calculate according to dichotomy;
(7) relay protection constant value backup protection scope is determined;
(8) judge whether factory's Divergent line calculates complete, be, perform step (9), otherwise perform step (2);
(9) terminate.
The method adopts different computational methods according to the concrete condition of subordinate's circuit, thus the relay protection constant value backup protection scope can considered comprehensively, determine as the case may be, calculate in real time.
Accompanying drawing explanation
Fig. 1 is the flow chart of the computational methods according to relay protection constant value backup protection scope of the present invention.
Embodiment
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
As shown in Figure 1, the computational methods of this relay protection constant value backup protection scope, comprise the following steps:
(1) travel through circuit contained by plant stand, obtain the line set of the corresponding backup protection of configuration;
(2) circuit not carrying out calculating in extraction set is as analytic target;
(3) judge whether subordinate's circuit is double-circuit line, subordinate's circuit be not the carrying out of step (2) the next stage circuit of a circuit calculated, be perform step (4), otherwise perform step (6);
(4) judge whether subordinate's circuit is double loop and all there is power supply both sides, is, perform step (5), otherwise perform step (6);
(5) calculate, jump procedure (7) according to fixed step size approach method (namely adopting fixed step size not stop to arrange fault from head end to end on the line, until the electric parameters such as measurement impedance or electric current reaches corresponding definite value);
(6) according to dichotomy, (dichotomy: tentation data, by ascending sort, for set-point x, compares from the centre position of sequence, if present position values equals x, then searches successfully; If x is less than present position values, then search in the first half section of ordered series of numbers; If x is greater than present position values, continue to search in the second half section of ordered series of numbers, until find.) calculate;
(7) relay protection constant value backup protection scope is determined;
(8) judge whether factory's Divergent line calculates complete, be, perform step (9), otherwise perform step (2);
(9) terminate.
The method adopts different computational methods according to the concrete condition of subordinate's circuit, thus the relay protection constant value backup protection scope can considered comprehensively, determine as the case may be, calculate in real time.
Preferably, described fixed step size is 5/1000ths of line length.
Preferably; by the reflection of graphics relay protection constant value backup protection scope is converted into the graphical information on electrical network geographical wiring diagram, adopts color rendering and image glisten intuitively to show the backup protection scope of selected operational mode line and transformer on electrical network geographical wiring diagram.
For ensureing that backup protection scope can be very clear, play up centered by target plant stand, other plant stands not in protection range and circuit all with dead color mark, are simple and easy to see, clear eye-catching.With current triggering plant stand color for dominant hue, backup protection scope is all with this color rendering.
For the displaying of line range, backup protections all in plant stand is calculated protection range, all circuits in protection range are played up by respective color on figure and glimmers, do not have the circuit protecting total length to represent at protection range end percentage label.Can by arranging the protection range that calculates corresponding progression and showing, also can show that the backup protection scope of single line or combination in any show the backup protection scope of many circuits.
For the displaying of transformer scope, directly identify in the plant stand of line end at the corresponding levels, above plant stand, whether the dated transformer title of flag mark and protection range stretch out other sides of transformer.As: as: 1# change/in+/ low-: expression and 1# matched transformer co-bit are set to high-pressure side, " in+" identify and stretch out transformer medium voltage side; " low-" expression does not stretch out step down side.Because power transformer interior fault calculates very complicated, the position of inside transformer is stretched in indefinite calculating.
The present invention has the following advantages:
1. conventional method only can check backup protection definite value, and point information is mapped on electrical network geographical wiring diagram by this scheme, scope directly perceived, clear, to check backup protection legibly.
2. adopt the calculated with mathematical model fault of practical ways, protection range is more accurate.
3. as required, the backup protection ambit under any plant stand, arbitrarily operational mode can be checked, convenient, fast.
4. can access electrical network real-time mode data, check the backup protection situation of current electric grid, for relaying protection personnel reference, process in time, get rid of hidden danger.
The above; it is only preferred embodiment of the present invention; not any pro forma restriction is done to the present invention, every above embodiment is done according to technical spirit of the present invention any simple modification, equivalent variations and modification, all still belong to the protection range of technical solution of the present invention.
Claims (3)
1. computational methods for relay protection constant value backup protection scope, is characterized in that, comprise the following steps:
(1) travel through circuit contained by plant stand, obtain the line set of the corresponding backup protection of configuration;
(2) circuit not carrying out calculating in extraction line set is as analytic target;
(3) judge whether subordinate's circuit is double-circuit line, subordinate's circuit be not the carrying out of step (2) the next stage circuit of a circuit calculated, be perform step (4), otherwise perform step (6);
(4) judge whether subordinate's circuit is double loop and all there is power supply both sides, is, perform step (5), otherwise perform step (6);
(5) calculate according to fixed step size approach method, jump to step (7);
(6) calculate according to dichotomy;
(7) relay protection constant value backup protection scope is determined;
(8) judge whether factory's Divergent line calculates complete, be, perform step (9), otherwise perform step (2);
(9) terminate.
2. the computational methods of relay protection constant value backup protection scope according to claim 1, is characterized in that, described fixed step size is 5/1000ths of the line length of described step (2).
3. the computational methods of relay protection constant value backup protection scope according to claim 1 and 2; it is characterized in that; by the reflection of graphics relay protection constant value backup protection scope is converted into the graphical information on electrical network geographical wiring diagram, adopts color rendering and image glisten intuitively to show the backup protection scope of selected operational mode line on electrical network geographical wiring diagram.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210434994.9A CN103050949B (en) | 2012-11-02 | 2012-11-02 | Calculation method for relay protection fixed value backup protection range |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210434994.9A CN103050949B (en) | 2012-11-02 | 2012-11-02 | Calculation method for relay protection fixed value backup protection range |
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| Publication Number | Publication Date |
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| CN103050949A CN103050949A (en) | 2013-04-17 |
| CN103050949B true CN103050949B (en) | 2015-07-15 |
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| CN201210434994.9A Expired - Fee Related CN103050949B (en) | 2012-11-02 | 2012-11-02 | Calculation method for relay protection fixed value backup protection range |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4375881B2 (en) * | 2000-05-16 | 2009-12-02 | 株式会社高岳製作所 | Protective relay using photocurrent sensor |
| CN102427274A (en) * | 2011-09-29 | 2012-04-25 | 广西电网公司电力调度控制中心 | Method for acquiring real-time states of power grid element |
| CN102629754A (en) * | 2012-03-31 | 2012-08-08 | 积成电子股份有限公司 | Substation area back-up protecting method based on current differential principle |
| CN102638027A (en) * | 2012-04-17 | 2012-08-15 | 贵州电网公司电力调度控制中心 | Switch refusing action fault simulation method for online safety and stability evaluation of electric power system |
-
2012
- 2012-11-02 CN CN201210434994.9A patent/CN103050949B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4375881B2 (en) * | 2000-05-16 | 2009-12-02 | 株式会社高岳製作所 | Protective relay using photocurrent sensor |
| CN102427274A (en) * | 2011-09-29 | 2012-04-25 | 广西电网公司电力调度控制中心 | Method for acquiring real-time states of power grid element |
| CN102629754A (en) * | 2012-03-31 | 2012-08-08 | 积成电子股份有限公司 | Substation area back-up protecting method based on current differential principle |
| CN102638027A (en) * | 2012-04-17 | 2012-08-15 | 贵州电网公司电力调度控制中心 | Switch refusing action fault simulation method for online safety and stability evaluation of electric power system |
Non-Patent Citations (4)
| Title |
|---|
| 丁勇.发电厂继电保护整定计算的微机实现.《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑(月刊 )》.2009,(第2期),1-74. * |
| 大受端电网继电保护运行管理若干问题的思考;胡宏等;《华东电力》;20071124;第35卷(第11期);19-22 * |
| 大电网继电保护技术应用与发展;陈建民等;《华东电力》;20071124;第35卷(第11期);7-14 * |
| 杨增力.超高压线路继电保护整定计算及协调问题研究.《中国博士学位论文全文数据库 工程科技Ⅱ辑(月刊 )》.2009,(第5期),1-45. * |
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