CN106485025A - A kind of check method of direct current protecting definite value - Google Patents
A kind of check method of direct current protecting definite value Download PDFInfo
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- CN106485025A CN106485025A CN201610940761.4A CN201610940761A CN106485025A CN 106485025 A CN106485025 A CN 106485025A CN 201610940761 A CN201610940761 A CN 201610940761A CN 106485025 A CN106485025 A CN 106485025A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/30—Circuit design
- G06F30/32—Circuit design at the digital level
- G06F30/33—Design verification, e.g. functional simulation or model checking
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Abstract
The present invention discloses a kind of check method of direct current protecting definite value, is related to DC control resist technology field, to improve the check efficiency of direct current protecting definite value.The check method of the direct current protecting definite value includes：The simulation model of DC transmission system is built in EMTDC platform, and obtaining DC transmission system needs to execute each fault data of direct current protecting；In the computing platform separate with EMTDC platform, build the self-defined direct current protecting model of operational precision identical of operational precision and DC transmission system simulation model, using each fault data as self-defined direct current protecting model input variable；Setting direct current protecting definite value, the self-defined direct current protecting model of simulation run, determine protection act of the self-defined direct current protecting model under the effect of direct current protecting definite value, and judge whether the protection act meets target call.The check method of the direct current protecting definite value that the present invention is provided is protected for DC transmission system DC.
Description
Technical field
The present invention relates to DC control resist technology field, more particularly to a kind of check method of direct current protecting definite value.
Background technology
Direct current protecting directly decides the peace of direct current transportation equipment as the core of direct current transportation electrical secondary system, its reliability
Entirely, and DC transmission system place electrical network stable operation.Before direct current protecting is applied to DC transmission system, it is right to need
Direct current protecting definite value carries out emulation check, with guarantee direct current protecting can in DC transmission system correct operation, realize to straight
The power transmission protection of stream transmission system.
At present, refering to Fig. 1, conventional direct current protecting definite value check method be in direct solenoid transient emulation
In (Electromagnetic Transients including DC, hereinafter referred to as EMTDC) platform, build including direct current
The DC engineering simulation model of transmission system and direct current protecting, and consider the fault condition that DC transmission system is likely encountered, right
DC engineering simulation model carries out the EMTDC emulation of DC transmission system multi-operating mode combination, and checking DC transmission system runs into event
During barrier, can direct current protecting execute correct operation in the presence of direct current protecting definite value, and if the result of EMTDC emulation fails
The target of direct current protecting is reached, then needs direct current protecting definite value is suitably adjusted, and re-start EMTDC emulation and test
Card.
However, when being checked to direct current protecting definite value by EMTDC emulation, due to the fault condition of DC transmission system
More, the factor that need to be considered in the fault condition that consideration DC transmission system is likely encountered is also a lot, such as：Abort situation,
Fault distance, DC voltage on the mode of connection, the AC system method of operation, dc power, fault moment, DC line etc.；
Wherein, all there are multiple choices again in each Consideration so that each Consideration combines needs the operating mode of emulation may be up to
Up to a hundred, along with DC engineering simulation model possesses the more node that crosses, cause to complete an EMTDC emulation time-consuming very
Long, cause the check of direct current protecting definite value less efficient.Less with carrying, when the result of EMTDC emulation proves direct current protecting definite value
When failing to meet use requirement, on the basis of appropriate adjustment direct current protecting definite value, in addition it is also necessary to repeat multi-operating mode combination
EMTDC simulating, verifying, so by the time-consuming of EMTDC emulation that be multiplied so that the check efficiency of direct current protecting definite value is extremely low
Under.
Content of the invention
It is an object of the invention to provide a kind of check method of direct current protecting definite value, for improving direct current protecting definite value
Check efficiency.
To achieve these goals, the present invention provides following technical scheme：
A kind of check method of direct current protecting definite value, comprises the following steps：
Step 1, builds the simulation model of DC transmission system in EMTDC platform, carries out DC transmission system multi-state
The EMTDC emulation of combination, obtaining DC transmission system needs to execute each fault data of direct current protecting；
Step 2, builds self-defined direct current protecting model in the computing platform separate with EMTDC platform, will each event
Barrier data are used as the input variable of self-defined direct current protecting model, and the operational precision of self-defined direct current protecting model is defeated with direct current
The operational precision of electric system simulation model is identical；
Step 3, arranges direct current protecting definite value, the self-defined direct current protecting mould of simulation run in self-defined direct current protecting model
Type, determines protection act of the self-defined direct current protecting model under the effect of direct current protecting definite value；
Step 4, judges whether the protection act of self-defined direct current protecting model meets target call；
If it is satisfied, then the check report of output direct current protecting definite value；
If be unsatisfactory for, direct current protecting definite value, return to step 3 is adjusted.
Compared with prior art, the check method of the direct current protecting definite value that the present invention is provided has the advantages that：
The check method of the direct current protecting definite value that the present invention is provided, by DC transmission system model on EMTDC platform
Simulation run, can obtain DC transmission system needs to execute each fault data of direct current protecting；Then select and EMTDC platform
Separate computing platform, and self-defined direct current protecting model is built in the computing platform, by each fault for obtaining before
Data are used as the input variable of self-defined direct current protecting model so that self-defined direct current protecting model can be directed to DC power transmission system
Each fault condition of system carries out the independent emulation of direct current protecting, that is, refers to self-defined direct current protecting model for each fault condition
The emulation of direct current protecting can possess specific aim and selectivity, when the self-defined direct current protecting model is carried out to direct current protecting definite value
During check, can effectively shorten self-defined direct current protecting model and duration is checked to the single of direct current protecting definite value, improve direct current and protect
The check efficiency of shield definite value；Also, compared with prior art in the DC engineering simulation model of EMTDC platform building, from
Define direct current protecting Model Independent to arrange in DC transmission system model, reduce the node that crosses in self-defined direct current protecting model
Quantity, can shorten further direct current protecting definite value single check duration, improve direct current protecting definite value check efficiency.
And, when self-defined direct current protecting model fails to meet target call to the check result of direct current protecting definite value,
Can be on the basis of self-defined direct current protecting model be checked for the first time to direct current protecting definite value, directly adjustment direct current protecting is fixed
Value, checks to the direct current protecting definite value after adjustment.Multi-state group is repeated to DC engineering model with prior art
The EMTDC simulating, verifying of conjunction compares, and the self-defined direct current protecting model that the present invention is provided need not be to DC transmission system
Multi-operating mode combination is emulated again, it is only necessary on the basis of previous direct current protecting definite value is checked, directly adjustment emulation,
Total check duration of the self-defined direct current protecting model to direct current protecting definite value can be shortened, improve the check effect of direct current protecting definite value
Rate.
Description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the present invention, this
Bright schematic description and description does not constitute inappropriate limitation of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 is the flow chart of direct current protecting definite value check method in prior art；
Fig. 2 is the flow chart of direct current protecting definite value check method provided in an embodiment of the present invention；
Fig. 3 is the structural representation of self-defined direct current protecting model provided in an embodiment of the present invention；
Fig. 4 is the structural representation of valve short circuit protection model logic control module provided in an embodiment of the present invention；
Fig. 5 is the intermediate treatment signal fusing figure of self-defined direct current protecting model and standard direct current protecting model；
Fig. 6 is that self-defined direct current protecting model compares figure with the result output signal of standard direct current protecting model.
Reference：
1- input module, 2- setup module,
3- Logic control module, 4- output module.
Specific embodiment
For ease of understanding, with reference to Figure of description, the check to direct current protecting definite value provided in an embodiment of the present invention
Method is described in detail.
Refering to Fig. 2, the check method of direct current protecting definite value provided in an embodiment of the present invention is comprised the following steps：
Step 1, builds the simulation model of DC transmission system in EMTDC platform, carries out DC transmission system multi-state
The EMTDC emulation of combination, obtaining DC transmission system needs to execute each fault data of direct current protecting；
Step 2, builds self-defined direct current protecting model in the computing platform separate with EMTDC platform, will each event
Barrier data are used as the input variable of self-defined direct current protecting model, and the operational precision of self-defined direct current protecting model is defeated with direct current
The operational precision of electric system simulation model is identical；
Step 3, arranges direct current protecting definite value, the self-defined direct current protecting mould of simulation run in self-defined direct current protecting model
Type, determines protection act of the self-defined direct current protecting model under the effect of direct current protecting definite value；
Step 4, judges whether the protection act of self-defined direct current protecting model meets target call；
If it is satisfied, then the check report of output direct current protecting definite value；
If be unsatisfactory for, direct current protecting definite value, return to step 3 is adjusted.
When being embodied as, the check method of direct current protecting definite value provided in an embodiment of the present invention, by straight on EMTDC platform
The simulation run of stream transmission system model, can obtain DC transmission system needs to execute each fault data of direct current protecting；So
Select and the separate computing platform of EMTDC platform afterwards, the selection of the computing platform should be by this area engineering staff according to straight
Stream transmission system needs the direct current protecting for executing voluntarily to select, and in the present embodiment, preferably uses MATLAB platform, flat in the computing
Self-defined direct current protecting model is built in platform, sets operational precision and the DC transmission system model of self-defined direct current protecting model
Operational precision identical, and using each fault data for obtaining before as self-defined direct current protecting model input variable；Afterwards
Direct current protecting definite value, and the self-defined direct current protecting model of simulation run are set in self-defined direct current protecting model, and determination is made by oneself
Protection act of the adopted direct current protecting model under the effect of direct current protecting definite value；Self-defined direct current protecting model is obtained in direct current protecting
After protection act under definite value effect, the protection act is judged, if the protection act of self-defined direct current protecting model
Target call is disclosure satisfy that, then the check report of output direct current protecting definite value, if the guarantor of self-defined direct current protecting model
Shield action can not meet target call, then need to adjust direct current protecting definite value, again the direct current protecting definite value after adjustment is imitated
True check, until the check result of direct current protecting definite value disclosure satisfy that target call.
By above-mentioned specific implementation process, the check method of direct current protecting definite value provided in an embodiment of the present invention, choosing
The computing platform separate with EMTDC platform is selected, and self-defined direct current protecting model is built in the computing platform, will before
The each fault data for obtaining is used as the input variable of self-defined direct current protecting model so that self-defined direct current protecting model being capable of pin
Each fault condition to DC transmission system carries out the independent emulation of direct current protecting, that is to say, that when the self-defined direct current protecting
When model is checked to direct current protecting definite value, self-defined direct current protecting model can for the emulation of each fault condition direct current protecting
To possess specific aim and selectivity, when can effectively shorten self-defined direct current protecting model the single of direct current protecting definite value being checked
Long, improve the check efficiency of direct current protecting definite value；Also, emulate with the DC engineering in prior art in EMTDC platform building
Model compares, and self-defined direct current protecting Model Independent is arranged in DC transmission system model, reduces self-defined direct current protecting
Cross in model the quantity of node, and the single that can shorten direct current protecting definite value further checks duration, improves direct current protecting fixed
The check efficiency of value.
And, when self-defined direct current protecting model fails to meet target call to the check result of direct current protecting definite value,
Can be on the basis of self-defined direct current protecting model be checked for the first time to direct current protecting definite value, directly adjustment direct current protecting is fixed
Value, checks to the direct current protecting definite value after adjustment.Multi-state group is repeated to DC engineering model with prior art
The EMTDC simulating, verifying of conjunction compares, and self-defined direct current protecting model provided in an embodiment of the present invention need not be to direct current transportation
The multi-operating mode combination of system is emulated again, it is only necessary on the basis of previous direct current protecting definite value is checked, and is directly adjusted imitative
Very, total check duration of the self-defined direct current protecting model to direct current protecting definite value can be shortened, improves direct current protecting definite value
Check efficiency.
In addition, in the check method of direct current protecting definite value provided in an embodiment of the present invention, building self-defined direct current protecting mould
During type, the operational precision for setting self-defined direct current protecting model is identical with the operational precision of DC transmission system model, it can be ensured that
Simulation result of the self-defined direct current protecting model to direct current protecting, can be imitated to DC transmission system model with EMTDC platform
True operation is mutually matched so that the direct current protecting definite value of self-defined direct current protecting Model Checking, may be directly applied to EMTDC platform
The subsequent control of middle DC transmission system model.
It is noted that in 2 the step of the embodiment of the present invention, the building method bag of self-defined direct current protecting model
Include：
Step 201, according to each fault data, obtains the direct current protecting type that DC transmission system needs to execute；
Step 202, analyzes the protection philosophy of direct current protecting type, determines each composition portion of self-defined direct current protecting model
Point；Specifically, refering to Fig. 3, the part of self-defined direct current protecting model includes：For obtaining the input mould of each fault data
Block 1, for arranging and adjusting the setup module 2 of direct current protecting definite value, for the logic control of simulation run direct current protecting type
Module 3, and for exporting the output module 4 of direct current protecting type execution action；Wherein, input module 1 and setup module 2 equal
It is connected with the data input end signal of Logic control module 3 respectively, the data output end of Logic control module 3 and output module 4
Signal connects；
Step 203, select with the separate computing platform of EMTDC platform, build on computing platform fixed from
Define direct current protecting model；In order to improve the check efficiency of direct current protecting definite value further, it is right that selected computing platform can be used for
The protection act of self-defined direct current protecting model carries out batch simulation run.
In order to expand check function of the self-defined direct current protecting model to different direct current protecting definite values, can also be self-defined straight
Other measurement indexs are set up in the setup module 2 of stream protection model, for instructing tune of the setup module 2 to direct current protecting definite value
Whole, and self-defined direct current protecting Model Independent is arranged in DC transmission system model, enables to setting up for other measurement indexs
More flexible and convenient.Exemplary, in embodiments of the present invention, adjustment of the setup module 2 to direct current protecting definite value, including：If
Put the threshold value that module 2 limits direct current protecting type；And/or, setup module 2 limits the time delay nargin of direct current protecting type；When
After setup module 2 limits the threshold value of direct current protecting type and time delay nargin, setup module 2 to the adjustment of direct current protecting definite value more
Tool practicality, can make analysis and evaluation to the reasonability of direct current protecting definite value.
For the building method of the above-mentioned self-defined direct current protecting model of clearer explanation, with the direct current protecting type for determining
As a example by valve short circuit protection type, it is described as follows.
Refering to Fig. 4, when DC transmission system needs the direct current protecting for executing to be valve short circuit protection, due to the short circuit of usual valve
The protection philosophy that protection is adopted is differential principle, and its concrete criterion formula is：
Protection I section：
Protection II section：
Wherein, IdCH refers to transverter high-pressure side DC current, and IdCN refers to transverter neutral end DC current, IacY/D
Converter power transformer Y bridge valve side alternating current IacY or converter power transformer D bridge valve side alternating current IacD is referred to,Refer to protection
The threshold value of I section,Refer to refer to the time delay nargin of protection I section,Refer to refer to the threshold value of protection II section,Refer to refer to protection
The time delay nargin of II section.
The differential principle of above-mentioned valve short circuit protection employing is analyzed, can determine each composition portion of self-defined direct current protecting model
Point, wherein, Logic control module 3 is needed to input module 1 and sets as the crucial composition for building self-defined direct current protecting model
The each data for putting the transmission of module 2 carry out dissection process, complete the simulation run of direct current protecting, and simulation calculating result is sent to
Output module 4；Logic control module 3 specifically includes five data processing units：One takes minimum value cell MIN, two time delays
Unit PT1, two protection act arithmetic elements DISA.
With continued reference to Fig. 4, specifically, IdCH, IdCN, IacY/D are the input module 1 of self-defined direct current protecting model
Input data,Input data for the setup module 2 of self-defined direct current protecting model；X1 and X2 divide
Not Wei protection act arithmetic element DISA fault data input, XR for protection act arithmetic element DISA threshold value be input into, T
It is input into for the time delay nargin of protection act arithmetic element DISA, ANQ starts result for the protection of protection act arithmetic element DISA
Output, Z1 are exported for the count results of protection act arithmetic element DISA；QU is the output module 4 of self-defined direct current protecting model
Output data.You need to add is that, Logic control module more than 3 is realized by programming language's program code, the bright reality of this law
Example is applied preferably with the simple VBScript language of grammer.
In order to ensure the self-defined direct current protecting model that builds on computing platform, standard can be carried out to direct current protecting definite value
Really check, on the basis of above-described embodiment, the building method of self-defined direct current protecting model also includes：
Step 204, checks whether self-defined direct current protecting model is correctly built；
If correct, self-defined direct current protecting model is run；
Each part of self-defined direct current protecting model if incorrect, is redefined, carries out self-defined direct current guarantor
Protect building again for model.
When being embodied as, there are multiple realization sides in the method for inspection for checking self-defined direct current protecting model whether correctly to build
Formula, should voluntarily be selected to set according to actual conditions by this area engineering staff, with can be self-defined straight to built on computing platform
Stream protection model carries out the checking of its operation accuracy and is defined.
In the embodiment that the present invention is provided, optionally, the side for checking self-defined direct current protecting model whether correctly to build
Method includes：Test data is chosen, test data difference input direct-current protective standard model and self-defined direct current protecting model are obtained
Operation result of the cut-off stream protective standard model on EMTDC platform, and self-defined direct current protecting model is on computing platform
Operation result；Judge the operation result of self-defined direct current protecting model, if the operation result with direct current protecting master pattern
Identical；If identical, self-defined direct current protecting model is correctly built；If it is not the same, then self-defined direct current protecting model is not
Correctly can build.
In above-described embodiment, direct current protecting master pattern is by this area engineering staff according to direct current protecting practical engineering experience
Or relevant industries standard sets itself, as long as can be used in evaluating whether self-defined direct current protecting model accurately checks direct current protecting
Definite value.And in prior art, checking mostly for direct current protecting definite value is that the DC engineering model that is set up by EMTDC platform is imitated
True check, therefore, the direct current protecting model that DC engineering model includes using in existing EMTDC platform is used as direct current protecting master die
Type, and a kind of optional specific embodiment.
It should be noted that judge the operation result of self-defined direct current protecting model whether with direct current protecting master pattern
Operation result identical when, refering to Fig. 5 and Fig. 6, can will be defeated to the intermediate treatment signal of self-defined direct current protecting model and result
Go out signal, corresponding comparison is carried out with the intermediate treatment signal of direct current protecting master pattern and result output signal respectively, if two
The signal transacting waveform of person is completely superposed, then operation result and the direct current protecting master pattern of self-defined direct current protecting model are described
Operation result identical.And accurately inspection knot can be obtained in order to ensure whether self-defined direct current protecting model is correctly built
Really, multigroup test data should be chosen to be tested.
In the description of above-mentioned embodiment, specific features, structure, material or feature can be at any one or many
Combined in individual embodiment or example in an appropriate manner.
The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, and any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be defined by the scope of the claims.
Claims (6)
1. a kind of check method of direct current protecting definite value, it is characterised in that comprise the following steps：
Step 1, builds the simulation model of DC transmission system in EMTDC platform, carries out the DC transmission system multi-state
The EMTDC emulation of combination, obtaining the DC transmission system needs to execute each fault data of direct current protecting；
Step 2, builds self-defined direct current protecting model in the computing platform separate with the EMTDC platform, will be described
Each fault data is used as the input variable of the self-defined direct current protecting model, and the computing of the self-defined direct current protecting model
Precision is identical with the operational precision of the DC transmission system simulation model；
Step 3, arranges direct current protecting definite value in the self-defined direct current protecting model, and self-defined direct current described in simulation run is protected
Shield model, determines protection act of the self-defined direct current protecting model under the direct current protecting definite value is acted on；
Step 4, judges whether the protection act of the self-defined direct current protecting model meets target call；
If it is satisfied, then the check report of the output direct current protecting definite value；
If be unsatisfactory for, the direct current protecting definite value, return to step 3 is adjusted.
2. the check method of direct current protecting definite value according to claim 1, it is characterised in that in step 2, described self-defined
The building method of direct current protecting model includes：
Step 201, according to each fault data, obtains the direct current protecting type that the DC transmission system needs to execute；
Step 202, analyzes the protection philosophy of the direct current protecting type, determines each composition of the self-defined direct current protecting model
Part；
Step 203, selects the computing platform separate with the EMTDC platform, builds and have determined that on the computing platform
Described self-defined direct current protecting model；
The computing platform is used for carrying out batch simulation run to the protection act of the self-defined direct current protecting model.
3. the check method of direct current protecting definite value according to claim 2, it is characterised in that in step 202, described makes by oneself
The part of adopted direct current protecting model includes：For obtaining the input module of each fault data, for arranging and adjusting
The setup module of the direct current protecting definite value, for the Logic control module of direct current protecting type described in simulation run, Yi Jiyong
In the output module for exporting the direct current protecting type execution action；Wherein,
The input module and the setup module are respectively connected with the data input end signal of the Logic control module, institute
The data output end for stating Logic control module is connected with the output module signal.
4. the check method of direct current protecting definite value according to claim 3, it is characterised in that the setup module is to described
The adjustment of direct current protecting definite value, including：
The setup module limits the threshold value of the direct current protecting type；And/or,
The setup module limits the time delay nargin of the direct current protecting type.
5. the check method of the direct current protecting definite value according to any one of claim 2-4, it is characterised in that described self-defined
The building method of direct current protecting model also includes：
Step 204, checks whether the self-defined direct current protecting model is correctly built；
If correct, the self-defined direct current protecting model is run；
Each part of the self-defined direct current protecting model if incorrect, is redefined, is carried out described self-defined straight
Stream protects building again for model.
6. the check method of direct current protecting definite value according to claim 5, it is characterised in that in step 204, inspection are described
The method whether self-defined direct current protecting model is correctly built includes：
Test data is chosen, by test data difference input direct-current protective standard model and the self-defined direct current protecting mould
Type, obtains operation result of the direct current protecting master pattern on EMTDC platform, and the self-defined direct current protecting model
Operation result on the computing platform；
Judge the operation result of the self-defined direct current protecting model, if the operation result with the direct current protecting master pattern
Identical；
If identical, the self-defined direct current protecting model is correctly built；
If it is not the same, then the self-defined direct current protecting model fails correctly to build.
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| CN107238768A (en) * | 2017-05-15 | 2017-10-10 | 国家电网公司 | A kind of direct current protecting time on-site calibration device and method based on same clock source |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107238768A (en) * | 2017-05-15 | 2017-10-10 | 国家电网公司 | A kind of direct current protecting time on-site calibration device and method based on same clock source |
| CN107769173A (en) * | 2017-11-13 | 2018-03-06 | 广东电网有限责任公司电力调度控制中心 | A kind of definite value choosing method of flexible direct current power transmission system bridge arm overcurrent protection |
| CN107769173B (en) * | 2017-11-13 | 2018-09-11 | 广东电网有限责任公司电力调度控制中心 | A kind of definite value choosing method of flexible direct current power transmission system bridge arm overcurrent protection |
| CN110058101A (en) * | 2019-05-15 | 2019-07-26 | 国家电投集团河南电力有限公司技术信息中心 | Accuracy detection method, device, equipment and the system of protective system in heat power definite value |
| CN110707738A (en) * | 2019-09-26 | 2020-01-17 | 南方电网科学研究院有限责任公司 | Multi-infeed direct-current power transmission system control optimization method and device and storage medium |
| CN110514941A (en) * | 2019-09-29 | 2019-11-29 | 南方电网科学研究院有限责任公司 | A kind of real-time simulation open-loop test method suitable for direct current protecting test |
| CN111525495A (en) * | 2020-04-14 | 2020-08-11 | 国网河南省电力公司电力科学研究院 | Relay protection fixed value online checking method and system and computer storage medium |
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