CN102290800B - Method for checking relay protection setting - Google Patents
Method for checking relay protection setting Download PDFInfo
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- CN102290800B CN102290800B CN201110231635.9A CN201110231635A CN102290800B CN 102290800 B CN102290800 B CN 102290800B CN 201110231635 A CN201110231635 A CN 201110231635A CN 102290800 B CN102290800 B CN 102290800B
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Abstract
The invention provides a method for checking relay protection setting, which can be utilized to realize the real-time monitoring and exact reflection of power grid characters, ensure the correct calculation result of the relay protection setting and the safe and stable running of a whole power grid, and reflect the actual load currents to the check process of the protection setting. In the method, real-time data of an EMS (energy management system), an overhaul information system and a failure information system are acquired, and a real-time running mode is utilized to calculate a current value and branch coefficients at a protection switch in each analog failure state, thus the flexibility and selectivity of the protection is checked in real time.
Description
Technical field
The present invention relates to power technology field, relate in particular to a kind of check method of relay protection constant value.
Background technology
Along with developing rapidly of China's electric power system, more and more higher to the requirement of system relay protection.The restriction that is subject to network system operational mode is calculated in traditional adjusting, and can only carry out to the operational mode of Set For Current the check of off-line definite value, considers that the wheel on conventional meaning examines to simulate current value and the braning factor in various fault points and fault type situation.When the operational mode of system changes; the setting parameter of electrical network changes thereupon; the now check of off-line cannot reflect the feature of electrical network exactly; cause the inaccurate of relay protection setting result of calculation; thereby have influence on the action situation of protective device, on the safe and stable operation of whole electrical network, also will produce certain impact.Conventionally when adjusting calculating, cannot predict the actual trend of system, therefore, when routine is adjusted middle assurance sensitivity, need to escape as far as possible load, so all adopt safe current herein but not actual load current.
Summary of the invention
For overcoming the defect of prior art, the technical problem to be solved in the present invention be to provide a kind of can real-time check, accurately reflect electrical network feature, make relay protection setting result of calculation accurately, guarantee whole power network safety operation, actual load current be reflected to the check method of the relay protection constant value in the check process of protection definite value.
Technical scheme of the present invention is: the check method of this relay protection constant value; by obtaining the real time data of EMS EMS, maintenance information system, failure information system; according to real time operation mode, calculate current value and the braning factor at protection switch place under each simulated failure state, on this basis sensitivity and the selectivity of protection are checked in real time.
Due to what obtain, be real time data and calculate according to real time operation mode, thus can real-time check, accurately reflect electrical network feature, make relay protection setting result of calculation accurately, guarantee whole power network safety operation, actual load current be reflected in the check process of protection definite value.
Accompanying drawing explanation
Fig. 1 is the flow chart of the check method of relay protection constant value of the present invention.
Embodiment
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
The check method of this relay protection constant value; by obtaining EMS (Energy Manage System; EMS), the real time data of maintenance information system, failure information system; according to real time operation mode, calculate current value and the braning factor at protection switch place under each simulated failure state, on this basis sensitivity and the selectivity of protection are checked in real time.
Preferably, after checking, output check result, provides definite value adjustment suggestion to not meeting the relay protection constant value of predetermined value; And carry out the data interaction of check result with EMS system, for management and running personnel Real-time Decision provides protection operation information, according to the check situation of relay protection constant value, provide early warning in various degree.
The check method of this relay protection constant value, comprises the following steps particularly:
(1) adopt the interface of CIM (Common Information Model, common information model) and EMS, maintenance information system, failure information system, to obtain real time data, these data comprise switch tool quantity of state and Real-time Power Flow data volume;
(2) according to real time operation mode, calculate current value and the braning factor at protection switch place under each simulated failure state;
(3) check the relevant strong definite value of principle, these definite values comprise: the starting current of route protection, the sensitivity of longitudinal differential protection system definite value, the sensitivity of transformer differential protection definite value, line backup protection sensitivity and selectivity, the sensitivity of transformer backup protection and selectivity, for the specified scope of given operational mode or the selectivity of line backup protection definite value of full electric network and the check of sensitivity, according to operate time of protection, carry out the automatic decision that adjacent protection coordinates hop count, and according to the selectivity of matching relationship automatic Verification protection, the verification of sensitivity is the nearly standby sensitivity of verification protection not only, the also standby sensitivity far away of verification protection, and point out respectively not meet the protection definite value of sensitivity requirement,
(4) check full electric network definite value, definite value item principle is divided into sensitivity principle and principle of selectivity, every corresponding interval of principle, definite value item is more than or equal to or is less than or equal to this interval boundary value, judges whether definite value meets this principle and need judge that definite value is whether in the definite value interval of this principle;
Wherein, after having checked online, can generate and check calculated description document, form is as follows:
The existing definite value of poplar Xu's 5124 lines (side creeps) phase spacing II sections (Z=18.71) is not meeting following setting principle under previous mode:
1, check and adjacent legs phase spacing I/II section mated condition
Coordinate with adjacent legs phase spacing I section
Adjacent cooperation branch road: poplar Xu 5124 lines
Formula: Kk*Zl+Kk ' * Kzz*Zdz '=0.8*11.68445+0.8*0.99084*3.18=11.868
Calculated value Z '=11.868,11.868≤18.71, coordinate branch road not meet selectivity requirement, consider to coordinate with next section
The degree of deviation: 37
Help and increase coefficient mode and describe: real-time little mode: Xu crosses 5114 lines maintenance, breaks down in the poplar row 500kV bus I side of poplar Xu 5124 lines
>->---mismatch with adjacent legs phase spacing I section, consider to coordinate with its phase spacing II section
Adjacent cooperation branch road: poplar Xu 5124 lines
Formula: Kk*Zl+Kk ' * Kzz*Zdz '=0.8*11.68445+0.8*0.99084*7.93=15.633
Calculated value Z '=15.633,15.633≤18.71, coordinate branch road not meet selectivity and require the degree of deviation: 16
Help and increase coefficient mode and describe: real-time little mode: Xu crosses 5114 lines maintenance, breaks down in the poplar row 500kV bus I side of poplar Xu 5124 lines
Coordinate branch road: poplar Xu 5124 lines
This branch road time definite value: 0.8
Coordinate branch road time value: 1.1,1.1 > 0.8, the time that do not meet checks
■ above from ' check completes ' to ' time that do not meet checks ' section, has mainly provided the detailed description in current check process.By to current circuit (poplar Xu 5124 lines), this circuit is positioned at the transformer station that creeps (side creeps), phase spacing II section to circuit is checked, its definite value is Z=18.71, the principle of phase spacing II section in check process: do not meet during with adjacent legs phase spacing I/II section mated condition, in actual check process, the phase spacing I section that is first adjacent branch road coordinates, if coordinated, do not meet, consider that the phase spacing II section that is adjacent branch road coordinates.Meanwhile, consider to coordinate with the time of adjacent legs.
■ wherein, checks the discontented degree of deviation that is enough to and calculates, and checks to meet with nargin and calculates, and result all takes absolute value.
■ checks the degree of deviation/nargin computing formula:
(5) after check, generate standby definite value and check calculation original text, clearly protect definite value whether to meet sensitivity and whether there is selectivity.
Preferably, the method also comprises step:
(6) provide a detailed check calculated description, comprise verification mode details, check the important average information of calculating and do not meet claimed detailed reason; And check result and EMS system are carried out to data interaction, and EMS system does not meet the degree of deviation according to definite value, and early warning information is in various degree provided.
The above; it is only preferred embodiment of the present invention; not the present invention is done to any pro forma restriction, any simple modification, equivalent variations and modification that every foundation technical spirit of the present invention is done above embodiment, all still belong to the protection range of technical solution of the present invention.
Claims (3)
1. the check method of a relay protection constant value, it is characterized in that, by obtaining the real time data of EMS EMS, maintenance information system, failure information system, according to real time operation mode, calculate current value and the braning factor at protection switch place under each simulated failure state, on this basis sensitivity and the selectivity of protection are checked in real time; After checking, output check result, provides protection definite value adjustment suggestion to not meeting the relay protection constant value of predefined protection definite value; And carry out the data interaction of check result with EMS EMS, for management and running personnel Real-time Decision provides protection operation information, according to the check situation of relay protection constant value, provide early warning in various degree.
2. a check method for relay protection constant value, is characterized in that, comprises the following steps:
(1) adopt common information model and EMS EMS, maintenance information system, failure information system interface, to obtain real time data, these data comprise switch tool quantity of state and Real-time Power Flow data volume;
(2) according to real time operation mode, calculate current value and the braning factor at protection switch place under each simulated failure state;
(3) check the strong protection definite value of principle correlation, these protection definite values comprise: the starting current of route protection, the sensitivity of longitudinal differential protection system definite value, the sensitivity of transformer differential protection definite value, line backup protection sensitivity and selectivity, the sensitivity of transformer backup protection and selectivity, for the specified scope of given operational mode or the selectivity of line backup protection definite value of full electric network and the check of sensitivity, according to operate time of protection, carry out the automatic decision that adjacent protection coordinates hop count, and according to the selectivity of matching relationship automatic Verification protection, the verification of sensitivity is the nearly standby sensitivity of verification protection not only, the also standby sensitivity far away of verification protection, and point out respectively not meet the protection definite value of sensitivity requirement,
(4) check full electric network protection definite value, protection definite value item principle is divided into sensitivity principle and principle of selectivity, every corresponding interval of principle, protection definite value item is more than or equal to or is less than or equal to this interval boundary value, and whether judgement protection definite value meets this principle need judge that protection definite value is whether in the protection definite value interval of this principle;
(5) after check, generate backup protection definite value and check calculation original text, clearly protect definite value whether to meet sensitivity and whether there is selectivity.
3. the check method of relay protection constant value according to claim 2, is characterized in that, also comprises step:
(6) provide a detailed check calculated description, comprise verification mode details, check the important average information of calculating and do not meet claimed detailed reason; And check result and EMS system are carried out to data interaction, and EMS EMS does not meet the degree of deviation according to protection definite value, and early warning information is in various degree provided.
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| CN201110231635.9A CN102290800B (en) | 2011-08-12 | 2011-08-12 | Method for checking relay protection setting |
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| CN102290800B true CN102290800B (en) | 2014-04-09 |
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| CN102545179B (en) * | 2012-03-14 | 2014-06-04 | 成都电业局 | Method for determining multiple sets of relay protection constant values based on power supply schemes of partial power grids |
| CN102930398A (en) * | 2012-11-06 | 2013-02-13 | 安徽省电力公司检修公司 | Intelligent checking method and system for relay protection setting values based on extensible markup language (XML) technology |
| CN102969692A (en) * | 2012-12-12 | 2013-03-13 | 四川省电力公司 | Branch coefficient calculation method based on real-time data of power grid |
| CN103020476B (en) * | 2012-12-28 | 2015-03-11 | 中国南方电网有限责任公司超高压输电公司 | Method and system for assessing relay protection dynamic characteristics of high-voltage direct-current power transmission line |
| CN103199492A (en) * | 2013-03-28 | 2013-07-10 | 北京中恒博瑞数字电力科技有限公司 | Motion simulation method of protection constant value |
| CN103280779B (en) * | 2013-04-19 | 2015-04-15 | 广东电网公司电力调度控制中心 | Auditing processing method for relay protection setting value |
| CN103294869A (en) * | 2013-06-08 | 2013-09-11 | 华北电力大学 | Protection definite value action simulation method based on cooperating of whole network |
| CN103474972B (en) * | 2013-08-28 | 2016-04-13 | 广东电网公司电力调度控制中心 | A kind of relaying protection on-line setting method |
| CN103632308B (en) * | 2013-11-01 | 2017-06-16 | 广东电网公司电力调度控制中心 | She Wang power plant relay protection constant value risk evaluating system based on expert system |
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| CN104142448B (en) * | 2014-07-31 | 2016-09-14 | 国家电网公司 | A kind of defencive function automatic Verification method of microcomputer type transform er differential protection device |
| CN104269809B (en) * | 2014-10-14 | 2017-05-24 | 上海电力学院 | Method for on-line verification of relay protection setting value of regional power grid |
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| CN108110739B (en) * | 2017-12-27 | 2019-07-26 | 广东电网有限责任公司惠州供电局 | A kind of distribution network line protection definite value check algorithm |
| CN109616995B (en) * | 2018-11-26 | 2020-06-05 | 内蒙古电力(集团)有限责任公司电力调度控制分公司 | Automatic fixed value list auditing method based on user-defined rule base |
| CN109728563B (en) * | 2018-12-29 | 2021-04-20 | 国家电网有限公司 | Multi-set principle checking method and device for on-line checking of fixed value |
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