CN106530126A - Calculation method and calculation system for online checking of relay protection setting value - Google Patents
Calculation method and calculation system for online checking of relay protection setting value Download PDFInfo
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- CN106530126A CN106530126A CN201610965216.0A CN201610965216A CN106530126A CN 106530126 A CN106530126 A CN 106530126A CN 201610965216 A CN201610965216 A CN 201610965216A CN 106530126 A CN106530126 A CN 106530126A
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- impedance
- grid equipment
- relay protection
- positive sequence
- parameter
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
- G06Q50/06—Electricity, gas or water supply
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
Abstract
The invention discloses a calculation method and a calculation system for online checking of a relay protection setting value. The parallel calculation method comprises the steps of acquiring an online checking task according to an online checking request for the relay protection setting value; distributing the online checking task to different calculation centers in a parallel calculation server according to the relay protection setting value, the type of an affiliated relay protection device and the load of the parallel calculation server, wherein the relay protection device comprises a line, a transformer and a bus; acquiring the relay protection setting value by the parallel calculation server according to a calculating parameter; and acquiring an online checking result according to the relay protection setting value. According to the calculation method and the calculation system, through distributing the calculating task for obtaining parallel tasks, a power grid operation parameter which is related with the online checking request can be quickly acquired. On the condition that the solving scale of the problem does not increase, online checking efficiency for the relay protection setting value is improved, and large-scale and complex calculation problems in online checking of the setting value are effectively settled.
Description
Technical field
The invention belongs to field of relay protection in power, more particularly, to a kind of relay protection constant value on-line check
Computational methods and system.
Background technology
The powerful senior application of types of functionality has been built based on intelligent grid supporting system technology basic platform,
These senior applications provide the functions such as abundant monitoring, early warning for power scheduling.To meet intelligent grid and intelligent scheduling
The demand of construction, improves the control of relay protection personnel, power scheduling personnel, method of operation personnel to relay protection action behavior
Ability, it is proposed that based on intelligent grid supporting system technology build relay protection constant value on-line check and early warning application will
Ask.
Relay protection constant value Dynamic calculation method (Bi Zhaodong, Wang Ning, Xia Yanhui, Liu Wei, Liu Yimin, Xu Pengliang. be based on
The relay protection constant value on-line check system [J] of dynamic calculation of short-circuit current. Automation of Electric Systems, 2012,07:81-85) energy
Many factors in enough reference calculation procedures, result of calculation is more accurate, but but calculating speed is low.And for relay is protected
Shield constant value on-line check, its calculating speed are particularly significant.If online calculation and check takes the long even more than refresh cycle of EMS
15 minutes, it will have influence on the quick-action and reliability of relay protection action after electric power system fault occurs, consequently, it is possible to so that
Grid collapses, so requirement of real-time is most important to checking online, is to meet this requirement, must just adopt and effectively arrange
Apply to improve calculating speed.
The content of the invention
For the disadvantages described above or Improvement requirement of prior art, the invention provides a kind of relay protection constant value on-line check
Computational methods and system, its object is to improve the calculating speed that relay protection constant value is calculated in real time by parallel computation.
For achieving the above object, according to one aspect of the present invention, there is provided a kind of relay protection constant value on-line check
Computational methods, comprise the following steps：
(1) according to the online calculating task checked request and electric network model, obtain operation of power networks parameter；
(2) according to operation of power networks parameter and the type of grid equipment, it is parallel task by the distribution of computation tasks；Institute
Stating grid equipment includes circuit, transformer and bus, and the operation of power networks parameter includes maximum short circuit current Id.max, it is minimum short
Road electric current Id.min, maximum bus residual voltage Ucy.max, minimum bus residual voltage Ucy.min, maximum branch COEFFICIENT Kfz.max, and measurement impedance
Zφ；
(3) parallel task is performed, obtains operation of power networks parameter；
(4) according to the operation of power networks parameter, obtain online check result.
Preferably, the maximum short circuit current isWherein, IjFor the base of grid equipment
Quasi- electric current；Zxt1.maxFor under maximum operational mode, the positive sequence short-circuit impedance of this side power supply to protective relaying device of grid equipment,
ZxlFor the positive sequence impedance of grid equipment, safety factor KkFor 1.2～1.3 constant.
Preferably, the minimum short circuit current isWherein, IjFor the base of grid equipment
Quasi- electric current；Zxt1.minFor under minimum operational mode, the positive sequence short-circuit impedance of this side power supply to protective relaying device of grid equipment,
Zi (2)For line to line fault when grid equipment impedance.
Preferably, the maximum bus residual voltage isWherein, ZxlFor the positive sequence of grid equipment
Impedance, Zxt1.maxFor under maximum operational mode, the positive sequence short-circuit impedance of this side power supply to protective relaying device of grid equipment.
Preferably, the minimum bus residual voltage isWherein, ZxlFor the positive sequence of grid equipment
Impedance, Zxt1.minFor under minimum operational mode, the positive sequence short-circuit impedance of this side power supply to protective relaying device of grid equipment.
Preferably, the maximum branch coefficient isWherein, ZxlSet for electrical network
Standby positive sequence impedance, Zxt1.minFor under system minimum operational mode, this side power supply of grid equipment to protective relaying device just
Sequence short-circuit impedance, Zxt2.minFor under system minimum operational mode, grid equipment helps the positive sequence for increasing power supply to protective relaying device
Short-circuit impedance.
Preferably, it is described measurement impedance beWherein, UφFor the faulted phase voltage of grid equipment, Iφ
It is the faulted phase current that protective relaying device is flow through from grid equipment, I0It is the failure that protective relaying device is flow through from grid equipment
Zero-sequence current, K0For zero sequence current compensation factor,z0For the positive sequence impedance of the unit length of grid equipment, z1
For the zero sequence impedance of the unit length of grid equipment.
It is another aspect of this invention to provide that a kind of computing system of relay protection constant value on-line check is additionally provided, including
Control centre and parallel computation server；The parallel computation server includes control centre and multiple calculating maincenters；
The first end of the control centre connects the first end of control centre, and the second end is used for the energy management for connecting outside
System；
The control centre connects multiple calculating maincenters respectively；
The control centre is used to check request and electric network model according to online, and the calculating for obtaining operation of power networks parameter is appointed
Business, and according to operation of power networks parameter, obtain online check result；
The control centre is for being parallel task by the distribution of computation tasks, and the heart and calculating maincenter in the controlling
Between, carry out data buffer storage；
The parallel computation server is for according to device parameter and parallel task, acquisition operation of power networks parameter.
Preferably, the computing system also includes the device parameter database for storage facilities parameter.
In general, by the contemplated above technical scheme of the present invention compared with prior art, with following beneficial effect
Really：
1st, the present invention is by being parallel task by distribution of computation tasks so that online to check the related operation of power networks ginseng of request
Number can be obtained rapidly, in the case where the solution scale of problem is not expanded, improve relay protection constant value on-line check speed, have
The solving that constant value on-line check is medium-and-large-sized of effect and the computational problem of complexity；
2nd, according to operation of power networks parameter and its type of affiliated grid equipment, the different type of different grid equipments will be belonged to
Operation of power networks parametric distribution to different calculating maincenters, improve check efficiency and calculating speed, while ensure that relay is protected
The quick-action and reliability of shield；
3rd, the present invention can carry out the calculating of operation of power networks parameter simultaneously using multiple calculating maincenters, follow-up so as to accelerate
The online efficiency checked；The calculating feedback time that empirical tests are checked online is less than 3 seconds, fully meets the online school of relay protection constant value
The requirement of real time of core.
Description of the drawings
Fig. 1 is the structural representation of the computing system of relay protection on-line check of the present invention；
Fig. 2 is that control centre of the present invention distributes online checking task principle schematic.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, it is below in conjunction with drawings and Examples, right
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, and
It is not used in the restriction present invention.As long as additionally, technical characteristic involved in invention described below each embodiment
Do not constitute conflict each other can just be mutually combined.
The invention provides a kind of computing system of relay protection constant value on-line check, as shown in figure 1, including in control
The heart, device parameter database and parallel computation server；The parallel computation server includes control centre and multiple meters
Calculation maincenter；The EMS (EMS) of online check terminal and electrical network outside control centre's connection.
The course of work of the computing system is comprised the following steps：
(1-1) outside online check terminal sends the online check request of relay protection constant value；
(1-2) control centre is obtained according to the electric network model in the online EMS for checking request and electrical network
Position and annexation of the protective relaying device in electric network model, and then obtain the grid equipment related to protective relaying device
Operation of power networks parameter calculating task；The grid equipment includes circuit, transformer and bus, the operation of power networks parameter
Including maximum short circuit current Id.max, minimum short circuit current Id.min, maximum bus residual voltage Ucy.max, minimum bus residual voltage Ucy.min, most
Big braning factor Kfz.max, and measurement impedance Zφ；
(2) the online check is appointed by control centre according to operation of power networks parameter and its type of affiliated grid equipment
Business distribution is to prioritizing selection low-load or the calculating maincenter of light load；Its concrete distribution method is as shown in Fig. 2 for the first time first will be with
The related grid equipment of protective relaying device is circuit, bus and voltage according to Type division, for the second time again to same type electricity
Distinct device in net equipment makes a distinction, and has l circuit, m transformer and n bus, reentry in such as Fig. 2 for the third time
The calculating task of the operation of power networks parameter of each grid equipment；
(3) parallel computation server obtains device parameter from device parameter database, and performs parallel appointing according to device parameter
Business, the operation of power networks parameter needed for obtaining；In operation of power networks parameter, maximum short circuit current is
Minimum short circuit current (under system minimum operational mode, the line to line fault electric current of grid equipment end) isMaximum bus residual voltage (under system maximum operational mode, the three-phase shortcircuit of grid equipment end
When bus residual voltage) beMinimum bus residual voltage (under system minimum operational mode, grid equipment
Bus residual voltage during the three-phase shortcircuit of end) beMaximum branch coefficient isMeasuring impedance isZero sequence current compensation factorWherein, safety factor KkFor 1.2～1.3 constant；Used device parameter has the benchmark of grid equipment
Electric current Ij, under maximum operational mode, the positive sequence short-circuit impedance Z of this side power supply to protective relaying device of grid equipmentxt1.max, most
Under the little method of operation, the positive sequence short-circuit impedance Z of this side power supply to protective relaying device of grid equipmentxt1.min, grid equipment
Positive sequence impedance Zxl, the impedance of grid equipment during line to line faultUnder minimum operational mode, grid equipment help increasing power supply to after
The positive sequence short-circuit impedance Z of electrical protective devicext2.min, the faulted phase voltage U of grid equipmentφ, flow through relay protection from grid equipment
The faulted phase current I of deviceφ, the failure zero-sequence current I of protective relaying device is flow through from grid equipment0, the unit of grid equipment
Positive sequence impedance z of length0And the zero sequence impedance z of the unit length of grid equipment1；
(4) control centre is carried out to the relay protection constant value that online check terminal is given according to the operation of power networks parameter
It is online to check, obtain online check result；
Relay protection constant value mainly includes circuit reliability, circuit sensitivity, route choosing, line start value, circuit
Distance load-bearing capacity more than three sections, transformer sensitivity, transformer reliability, transformer initiation value and bus sensitivity and bus
Initiation value；The online content checked includes judging the selectivity (protection device whether relay protection constant value can meet relay protection
During action, failure is broken from power system in interval as little as possible, ensure the fault-free portion of system to greatest extent
Point appoint a right safe operation), rapidity (excision failure as fast as possible, actuation time of general quick protection be 0.06s～
0.12s) and sensitivity (sensitivity coefficient (and when there is metallic short circuit in=protection domain the calculated value of fault parameter with protect
The ratio of protection unit action parameter value) between 1.2～2) and reliability (reliability：Not malfunction not tripping, safety factor exist
Between 1.2～1.3)；
, to coordinate, not exclusively coordinating and mismatch, control centre is to not exclusively coordinating and being unworthy of for online check result
The relay protection constant value of conjunction is enumerated, and forms alarm according to the relevant information of the online check result of the relay protection constant value
Information, and export to outside online check terminal.
Embodiment 1
The parallel computation server of the present embodiment includes control centre and multiple calculating maincenters；Control centre is by hadoop
Parallel computation Mater host nodes and redis caching servers composition, the two is standby each other；Multiple calculating maincenters are
Hadoop calculate node processors.
For the constant value on-line check demand that power scheduling control centre of Guo Wang Ningxia electric power company proposes, employ parallel
The advanced technologies such as computing technique.
(1) first required check Helan Mountain transforming plant protecting definite value checking task is started, is checked in control when online
The heart is received will carry out, after the task requests that line is checked, being opened according to protection equipment during electric power system fault in line check terminal
Dynamic time, duration and protection domain needed for full disengagement failure electric current, summarize cycle and the computer capacity of parallel computation
The important parameter of layering and zoning.
(2) calculating task of these important parameters is passed to into parallel computation server；Contain RCS- in the power system
931BM and WXH-803AB1R1 protection equipments, for the relay protection constant value on-line check of distinct device uses parallel computation；
Secondly for each protective relaying device, using parallel computing to III section of III section of its ground distance and phase spacing
Protection definite value carries out online calculation and check.Adjust the distance III section according to important parameter and protect the calculating of III section of definite value and phase spacing to appoint
After being engaged in being allocated and being initialized, each independent parallel task unit is distributed to into each calculate node processor.
(3) on each calculate node processor existing online check is called to service and perform after III section of guarantor of ground distance
Shield definite value and the online calculation and check of III section of phase spacing be allowed to respectively with adjacent legs ground distance I/III, adjacent legs spaced apart
Coordinate from I/III.After line calculation and check is finished, the result of calculation of the important parameter of each calculate node processor will by
Line is checked control centre and is received.
(4) important parameter that relay protection constant value can not have been matched after line checks control centre to check is arranged,
Place on line (Ningxia, big cyan line) residing for which, protection domain and time delay etc. are collected to form warning information, while updating
Line check result, and then push it to intelligent alarm terminal and check terminal online shown, finally give 6 protection dresses
Detailed results are verified in the station put as shown in table 1；Wherein, branch road is protected to be Ningxia, He Qing A-wires are rather for setting position
Summer, Helan Mountain become.
Check result information and warning information in 1 station of table
According to table 1, Ningxia, II section of check result of phase spacing of smalt C-wire are 12.79, and device is original fixed
It is worth for 13.01, the check, therefore needs to enter definite value at this up to 2% with I/III mating protection degree of deviation of adjacent legs phase spacing
Row modification.Due to the parallel computation that the present embodiment is used in online check process, the calculating time in the embodiment is various guarantors
The maximum of shield check time, so as to embody the high efficiency and real-time of the present invention.
As it will be easily appreciated by one skilled in the art that the foregoing is only presently preferred embodiments of the present invention, not to
The present invention, all any modification, equivalent and improvement made within the spirit and principles in the present invention etc. are limited, all should be included
Within protection scope of the present invention.
Claims (9)
1. a kind of computational methods of relay protection constant value on-line check, it is characterised in that comprise the following steps：
(1) according to the online calculating task checked request and electric network model, obtain operation of power networks parameter；
(2) according to operation of power networks parameter and the type of grid equipment, it is parallel task by the distribution of computation tasks；The electricity
Net equipment includes circuit, transformer and bus, and the operation of power networks parameter includes maximum short circuit current Id.max, minimum short circuit electricity
Stream Id.min, maximum bus residual voltage Ucy.max, minimum bus residual voltage Ucy.min, maximum branch COEFFICIENT Kfz.max, and measurement impedance Zφ；
(3) parallel task is performed, obtains operation of power networks parameter；
(4) according to the operation of power networks parameter, obtain online check result.
2. computational methods as claimed in claim 1, it is characterised in that the maximum short circuit current isWherein, IjFor the reference current of grid equipment；Zxt1.maxFor under maximum operational mode, electricity
The positive sequence short-circuit impedance of this side power supply to protective relaying device of net equipment, ZxlFor the positive sequence impedance of grid equipment, safety factor
KkFor 1.2～1.3 constant.
3. parallel calculating method as claimed in claim 1, it is characterised in that the minimum short circuit current isWherein, IjFor the reference current of grid equipment；Zxt1.minFor under minimum operational mode, electricity
The positive sequence short-circuit impedance of this side power supply to protective relaying device of net equipment, Zi (2)For line to line fault when grid equipment impedance.
4. computational methods as claimed in claim 1, it is characterised in that the maximum bus residual voltage isWherein, ZxlFor the positive sequence impedance of grid equipment, Zxt1.maxFor under maximum operational mode, electrical network
The positive sequence short-circuit impedance of this side power supply to protective relaying device of equipment.
5. computational methods as claimed in claim 1, it is characterised in that the minimum bus residual voltage isWherein, ZxlFor the positive sequence impedance of grid equipment, Zxt1.minFor, under minimum operational mode, electrical network sets
The positive sequence short-circuit impedance of this standby side power supply to protective relaying device.
6. computational methods as claimed in claim 1, it is characterised in that the maximum branch coefficient isWherein, ZxlFor the positive sequence impedance of grid equipment, Zxt1.minRun for system is minimum
Under mode, the positive sequence short-circuit impedance of this side power supply to protective relaying device of grid equipment, Zxt2.minUnder for minimum operational mode,
The positive sequence short-circuit impedance for helping increasing power supply to protective relaying device of grid equipment.
7. computational methods as claimed in claim 1, it is characterised in that the measurement impedance isWherein,
UφFor the faulted phase voltage of grid equipment, IφIt is the faulted phase current that protective relaying device is flow through from grid equipment, I0It is from electricity
Net equipment flows through the failure zero-sequence current of protective relaying device, K0For zero sequence current compensation factor,z0For electrical network
The positive sequence impedance of the unit length of equipment, z1For the zero sequence impedance of the unit length of grid equipment.
8. a kind of computing system of relay protection constant value on-line check, it is characterised in that including control centre and parallel computation
Server；The parallel computation server includes control centre and multiple calculating maincenters；
The control centre is used for according to the online calculating task checked request and electric network model, obtain operation of power networks parameter,
And according to operation of power networks parameter, obtain online check result；
The control centre for by the distribution of computation tasks be parallel task, and in the controlling the heart and calculate maincenter it
Between, carry out data buffer storage；
The parallel computation server is for according to device parameter and parallel task, acquisition operation of power networks parameter.
9. computing system as claimed in claim 8, it is characterised in that also include the device parameter number for storage facilities parameter
According to storehouse.
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| CN108345739A (en) * | 2018-02-08 | 2018-07-31 | 国家电网公司 | Recognize the method that CIME and SVG model file information realizations protection definite value on-line testing function obtains model |
| CN109586241A (en) * | 2017-12-31 | 2019-04-05 | 中国能源建设集团华东电力试验研究院有限公司 | The calculation method of Relay Protection Setting Calculation System |
| CN110399671A (en) * | 2019-07-19 | 2019-11-01 | 国网河北省电力有限公司邢台供电分公司 | Synchronizing calculation method, device and the terminal of the protective relaying device of power grid |
| CN111208369A (en) * | 2020-01-13 | 2020-05-29 | 中国核电工程有限公司 | Method and device for calculating short-circuit current of direct-current system of nuclear power plant |
| CN112234587A (en) * | 2020-10-09 | 2021-01-15 | 国网河南省电力公司电力科学研究院 | Power distribution network relay protection fixed value checking and evaluating method and system |
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| CN109586241A (en) * | 2017-12-31 | 2019-04-05 | 中国能源建设集团华东电力试验研究院有限公司 | The calculation method of Relay Protection Setting Calculation System |
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| CN112234587A (en) * | 2020-10-09 | 2021-01-15 | 国网河南省电力公司电力科学研究院 | Power distribution network relay protection fixed value checking and evaluating method and system |
| CN112234587B (en) * | 2020-10-09 | 2022-07-26 | 国网河南省电力公司电力科学研究院 | Method and system for checking and evaluating relay protection setting value of power distribution network |
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