CN106485025B - 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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- CN106485025B CN106485025B CN201610940761.4A CN201610940761A CN106485025B CN 106485025 B CN106485025 B CN 106485025B CN 201610940761 A CN201610940761 A CN 201610940761A CN 106485025 B CN106485025 B CN 106485025B
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- G06F30/30—Circuit design
- G06F30/32—Circuit design at the digital level
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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 protection technique 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 that DC transmission system is built in EMTDC platform, obtains each fault data that DC transmission system needs to be implemented direct current protecting；With the mutually independent operation platform of EMTDC platform, operational precision customized direct current protecting model identical with the operational precision of DC transmission system simulation model is built, using each fault data as the input variable of customized direct current protecting model；Direct current protecting definite value is set, and the customized direct current protecting model of simulation run determines protection act of the customized direct current protecting model under the effect of direct current protecting definite value, and judges whether the protection act meets target call.The check method of direct current protecting definite value provided by the invention is protected for DC transmission system DC.
Description
Technical field
The present invention relates to DC control protection technique field more particularly to a kind of check methods of direct current protecting definite value.
Background technique
Core of the direct current protecting as direct current transportation electrical secondary system, reliability directly decide the peace of direct current transportation equipment
Entirely and DC transmission system where power grid stable operation.Before direct current protecting is applied to DC transmission system, need pair
Direct current protecting definite value carries out emulation check, to ensure that direct current protecting can correctly act in DC transmission system, realizes to straight
Flow the power transmission protection of transmission system.
Currently, refering to fig. 1, common direct current protecting definite value check method is 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, it is right
DC engineering simulation model carries out the EMTDC emulation of DC transmission system multi-operating mode combination, and verifying DC transmission system encounters event
Can direct current protecting execute correct movement under the action of direct current protecting definite value when barrier, and if the result of EMTDC emulation fails
Reach the target of direct current protecting, then need to carry out appropriate adjustment to direct current protecting definite value, and re-starts EMTDC emulation and test
Card.
However, when being checked by EMTDC emulation to direct current protecting definite value, 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 very much, such as: abort situation,
The mode of connection, the AC system method of operation, dc power, fault moment, the fault distance on DC line, DC voltage etc.；
Wherein, there are multiple choices again in each Consideration, need the operating condition emulated may be up to so that each Consideration combines
Up to a hundred, along with DC engineering simulation model has the more node that crosses, lead to the time-consuming of EMTDC emulation of completion very
It is long, cause the check efficiency of direct current protecting definite value lower.Less with mentioning, when the result of EMTDC emulation proves direct current protecting definite value
When not being able to satisfy requirement, on the basis of appropriate adjustment direct current protecting definite value, it is also necessary to repeat multi-operating mode combination
EMTDC simulating, verifying, in this way by the time-consuming of EMTDC emulation that is multiplied, so that the check efficiency of direct current protecting definite value is extremely low
Under.
Summary of the invention
The purpose of the present invention is to provide a kind of check methods of direct current protecting definite value, for improving direct current protecting definite value
Check efficiency.
To achieve the goals above, the invention provides the following technical scheme:
A kind of check method of direct current protecting definite value, comprising the following steps:
Step 1, the simulation model of DC transmission system is built in EMTDC platform, carries out DC transmission system multi-state
Combined EMTDC emulation, obtains each fault data that DC transmission system needs to be implemented direct current protecting；
Step 2, with build customized direct current protecting model in the mutually independent operation platform of EMTDC platform, will it is each therefore
Hinder input variable of the data as customized direct current protecting model, and the operational precision of customized direct current protecting model and direct current are defeated
The operational precision of electric system simulation model is identical；
Step 3, direct current protecting definite value, the customized direct current protecting mould of simulation run are set in customized direct current protecting model
Type determines protection act of the customized direct current protecting model under the effect of direct current protecting definite value；
Step 4, judge whether the protection act of customized direct current protecting model meets target call；
If it is satisfied, then the check report of output direct current protecting definite value；
If conditions are not met, direct current protecting definite value is then adjusted, return step 3.
Compared with prior art, the check method of direct current protecting definite value provided by the invention has the advantages that
The check method of direct current protecting definite value provided by the invention passes through DC transmission system model on EMTDC platform
Simulation run can obtain each fault data that DC transmission system needs to be implemented direct current protecting；Then selection and EMTDC platform
Mutually independent operation platform, and customized direct current protecting model is built in the operation platform, each failure that will be obtained before
Input variable of the data as customized direct current protecting model enables customized direct current protecting model for DC power transmission system
Each fault condition of system carries out the independent emulation of direct current protecting, that is, refers to customized direct current protecting model for each fault condition
The emulation of direct current protecting can have specific aim and selectivity, when the customized direct current protecting model carries out direct current protecting definite value
When check, the customized direct current protecting model that can effectively shorten checks duration to the single of direct current protecting definite value, improves direct current and protects
Protect the check efficiency of definite value；Also, compared in the prior art in the DC engineering simulation model of EMTDC platform building, from
It defines direct current protecting Model Independent to be arranged in DC transmission system model, reduces the node that crosses in customized direct current protecting model
Quantity, can further shorten direct current protecting definite value single check duration, improve direct current protecting definite value check efficiency.
Moreover, when customized direct current protecting model is not able to satisfy target call to the check result of direct current protecting definite value,
Can be on the basis of customized direct current protecting model to check direct current protecting definite value for the first time, directly adjustment direct current protecting is fixed
Value, checks direct current protecting definite value adjusted.With multi-state group is repeated to DC engineering model in the prior art
The EMTDC simulating, verifying of conjunction compares, and customized direct current protecting model provided by the invention is not needed 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,
Customized direct current protecting model can be shortened to total check duration of direct current protecting definite value, improve the check effect of direct current protecting definite value
Rate.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes a part of the invention, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart of direct current protecting definite value check method in the 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 schematic diagram of customized direct current protecting model provided in an embodiment of the present invention；
Fig. 4 is the structural schematic diagram 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 customized direct current protecting model and standard direct current protecting model；
Fig. 6 is that the result output signal of customized direct current protecting model and standard direct current protecting model compares figure.
Appended drawing reference:
1- input module, 2- setup module,
3- Logic control module, 4- output module.
Specific embodiment
For ease of understanding, with reference to the accompanying drawings of the specification, to the check of direct current protecting definite value provided in an embodiment of the present invention
Method is described in detail.
Referring to Fig.2, the check method of direct current protecting definite value provided in an embodiment of the present invention the following steps are included:
Step 1, the simulation model of DC transmission system is built in EMTDC platform, carries out DC transmission system multi-state
Combined EMTDC emulation, obtains each fault data that DC transmission system needs to be implemented direct current protecting；
Step 2, with build customized direct current protecting model in the mutually independent operation platform of EMTDC platform, will it is each therefore
Hinder input variable of the data as customized direct current protecting model, and the operational precision of customized direct current protecting model and direct current are defeated
The operational precision of electric system simulation model is identical；
Step 3, direct current protecting definite value, the customized direct current protecting mould of simulation run are set in customized direct current protecting model
Type determines protection act of the customized direct current protecting model under the effect of direct current protecting definite value；
Step 4, judge whether the protection act of customized direct current protecting model meets target call；
If it is satisfied, then the check report of output direct current protecting definite value；
If conditions are not met, direct current protecting definite value is then adjusted, return step 3.
When it is implemented, 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 for flowing transmission system model, can obtain each fault data that DC transmission system needs to be implemented direct current protecting；So
Selection and the mutually independent operation platform of EMTDC platform afterwards, the selection of the operation platform should be by this field engineering staff according to straight
The direct current protecting that stream transmission system needs to be implemented voluntarily is selected, and in the present embodiment, preferably uses MATLAB platform, flat in the operation
Customized direct current protecting model is built in platform, sets the operational precision and DC transmission system model of customized direct current protecting model
Operational precision it is identical, and using each fault data obtained before as the input variable of customized direct current protecting model；Later
Direct current protecting definite value, and the customized direct current protecting model of simulation run are set in customized 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；Customized direct current protecting model is obtained in direct current protecting
After protection act under definite value effect, which is judged, if the protection act of customized direct current protecting model
It can satisfy target call, then the check report of direct current protecting definite value exported, if the guarantor of customized direct current protecting model
Shield movement is not able to satisfy target call, then needs adjustment direct current protecting definite value, imitate again direct current protecting definite value adjusted
It is true to check, until the check result of direct current protecting definite value can satisfy target call.
By above-mentioned specific implementation process it is found that the check method of direct current protecting definite value provided in an embodiment of the present invention, choosing
Select with the mutually independent operation platform of EMTDC platform, and customized direct current protecting model is built in the operation platform, will before
Input variable of the obtained each fault data as customized direct current protecting model, enables customized direct current protecting model needle
The independent emulation of direct current protecting is carried out to each fault condition of DC transmission system, that is to say, that when the customized direct current protecting
When model checks direct current protecting definite value, customized direct current protecting model can for the emulation of each fault condition direct current protecting
To have specific aim and selectivity, when the customized direct current protecting model that can effectively shorten checks the single of direct current protecting definite value
It is long, improve the check efficiency of direct current protecting definite value；Also, in the prior art EMTDC platform building DC engineering emulate
Model compares, and customized direct current protecting Model Independent is arranged in DC transmission system model, reduces customized direct current protecting
Cross the quantity of node in model, and the single that can further shorten direct current protecting definite value checks duration, and it is fixed to improve direct current protecting
The check efficiency of value.
Moreover, when customized direct current protecting model is not able to satisfy target call to the check result of direct current protecting definite value,
Can be on the basis of customized direct current protecting model to check direct current protecting definite value for the first time, directly adjustment direct current protecting is fixed
Value, checks direct current protecting definite value adjusted.With multi-state group is repeated to DC engineering model in the prior art
The EMTDC simulating, verifying of conjunction compares, and customized direct current protecting model provided in an embodiment of the present invention is not needed to direct current transportation
The multi-operating mode combination of system is emulated again, it is only necessary to which on the basis of previous direct current protecting definite value is checked, directly adjustment is imitative
Very, customized direct current protecting model can be shortened to total check duration of direct current protecting definite value, improve direct current protecting definite value
Check efficiency.
In addition, building customized direct current protecting mould in the check method of direct current protecting definite value provided in an embodiment of the present invention
When type, the operational precision for setting customized direct current protecting model is identical as the operational precision of DC transmission system model, it can be ensured that
Customized direct current protecting model can imitate with EMTDC platform DC transmission system model the simulation result of direct current protecting
True operation is mutually matched, so that the direct current protecting definite value of customized 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 the step 2 of the embodiment of the present invention, the building method packet of customized direct current protecting model
It includes:
Step 201, according to each fault data, the direct current protecting type that DC transmission system needs to be implemented is obtained；
Step 202, the protection philosophy for analyzing direct current protecting type, determines each composition portion of customized direct current protecting model
Point；Specifically, the component part of customized direct current protecting model includes: the input mould for obtaining each fault data refering to Fig. 3
Block 1, the logic control for being arranged and adjusting the setup module 2 of direct current protecting definite value, for simulation run direct current protecting type
Module 3, and the output module 4 for exporting direct current protecting type execution movement；Wherein, input module 1 and setup module 2 are equal
It is connect respectively with the data input pin signal of Logic control module 3, the data output end and output module 4 of Logic control module 3
Signal connection；
Step 203, selection with the mutually independent operation platform of EMTDC platform, built on operation platform it is fixed from
Define direct current protecting model；In order to further increase the check efficiency of direct current protecting definite value, selected operation platform can be used for pair
The protection act of customized direct current protecting model carries out batch simulation run.
It, can also be customized straight in order to expand customized direct current protecting model to the check function of different direct current protecting definite values
Other measurement indexs are added in the setup module 2 of stream protection model, for instructing setup module 2 to the tune of direct current protecting definite value
It is whole, and customized direct current protecting Model Independent is arranged in DC transmission system model, enables to adding for other measurement indexs
It is more flexible and convenient.Illustratively, in embodiments of the present invention, adjustment of the setup module 2 to direct current protecting definite value, comprising: set
Set the threshold value that module 2 limits direct current protecting type；And/or setup module 2 limits the delay nargin of direct current protecting type；When
After setup module 2 limits threshold value and the delay nargin of direct current protecting type, setup module 2 to the adjustment of direct current protecting definite value more
Have practicability, analysis assessment can be made to the reasonability of direct current protecting definite value.
For the building method of the clearer above-mentioned customized direct current protecting model of explanation, with determining direct current protecting type
For valve short circuit protection type, it is described as follows.
Refering to Fig. 4, when the direct current protecting that DC transmission system needs to be implemented is valve short circuit protection, due to usual valve short circuit
Protect the protection philosophy used for differential principle, specific criterion formula are as follows:
I sections of protection:
II sections of protection:
Wherein, IdCH refers to that inverter high-voltage end DC current, IdCN refer to inverter neutral end DC current, IacY/D
Refer to converter power transformer Y bridge valve side alternating current IacY or converter power transformer D bridge valve side alternating current IacD,Refer to guarantor
The threshold value of I sections of shield,Refer to and refer to the delay nargin for protecting I sections,Refer to and refer to the threshold value for protecting II sections,Refer to that finger is protected
The delay nargin of II sections of shield.
The differential principle that above-mentioned valve short circuit protection uses is analyzed, can determine each composition portion of customized direct current protecting model
Point, wherein Logic control module 3 is needed to input module 1 and is set as the crucial composition for building customized direct current protecting model
Each data for setting 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 is minimized unit MIN, two delays
Unit PT1, two protection act arithmetic element DISA.
With continued reference to Fig. 4, specifically, IdCH, IdCN, IacY/D are the input module 1 of customized direct current protecting model
Input data,For the input data of the setup module 2 of customized direct current protecting model；X1 and X2 points
Not Wei protection act arithmetic element DISA fault data input, XR be protection act arithmetic element DISA threshold value input, T
It is inputted for the delay nargin of protection act arithmetic element DISA, the protection that ANQ is protection act arithmetic element DISA starts result
Output, the count results that Z1 is protection act arithmetic element DISA export；QU is the output module 4 of customized direct current protecting model
Output data.You need to add is that 3 multi-pass of Logic control module crosses the realization of 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 customized direct current protecting model built on operation platform, direct current protecting definite value can be carried out quasi-
Really check, on the basis of the above embodiments, the building method of customized direct current protecting model further include:
Step 204, examine whether customized direct current protecting model is correctly built；
If correct, customized direct current protecting model is run；
If incorrect, each component part of customized direct current protecting model is redefined, carries out customized direct current guarantor
Shield model is built again.
When it is implemented, there are a variety of realization sides for the method for inspection for examining customized direct current protecting model whether correctly to build
Formula, should by this field engineering staff, voluntarily selection is set according to the actual situation, with can be customized straight to what is built on operation platform
Stream protection model carries out subject to its verifying for running accuracy.
In embodiment provided by the invention, optionally, the side for examining customized direct current protecting model whether correctly to build
Method includes: selection test data, and test data is distinguished input direct-current protective standard model and customized direct current protecting model, is obtained
Cut-off stream protective standard model on EMTDC platform operation result and customized direct current protecting model on operation platform
Operation result；Judge the operation result of customized direct current protecting model, if the operation result with direct current protecting master pattern
It is identical；If identical, customized direct current protecting model is correctly built；If it is not the same, then customized direct current protecting model is not
It can correctly build.
In above-described embodiment, direct current protecting master pattern is by this field 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 customized direct current protecting model accurately checks direct current protecting
Definite value.And in the prior art, the check of direct current protecting definite value is mostly that the DC engineering model established by EMTDC platform is imitated
It is true to check, therefore, using DC engineering model includes in existing EMTDC platform direct current protecting model as direct current protecting master die
Type and a kind of optional specific embodiment.
It should be noted that the operation result for judging customized direct current protecting model whether with direct current protecting master pattern
Operation result it is identical when, can be defeated by the intermediate treatment signal of customized direct current protecting model and result refering to Fig. 5 and Fig. 6
Signal out, respectively compared with the intermediate treatment signal of direct current protecting master pattern and result output signal correspond to, if two
The signal processing waveform of person is completely coincident, then illustrates the operation result and direct current protecting master pattern of customized direct current protecting model
Operation result it is identical.And it can obtain accurately examining knot in order to ensure whether customized direct current protecting model is correctly built
Fruit should choose multiple groups test data and be tested.
In the description of above embodiment, particular features, structures, materials, or characteristics can be at any one or more
It can be combined in any suitable manner in a embodiment or example.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (5)
1. a kind of check method of direct current protecting definite value, which comprises the following steps:
Step 1, the simulation model of DC transmission system is built in EMTDC platform, carries out the DC transmission system multi-state
Combined EMTDC emulation, obtains each fault data that the DC transmission system needs to be implemented direct current protecting；
Step 2, with build customized direct current protecting model in the mutually independent operation platform of the EMTDC platform:
Step 201, according to each fault data, the direct current protecting type that the DC transmission system needs to be implemented is obtained；
Step 202, the protection philosophy for analyzing the direct current protecting type determines each composition of the customized direct current protecting model
Part；
Step 203, selection and the mutually independent operation platform of the EMTDC platform, build on the operation platform and have determined that
The customized direct current protecting model；
The operation platform is used to carry out batch simulation run to the protection act of the customized direct current protecting model；
Using each fault data as the input variable of the customized direct current protecting model, and the customized direct current protecting
The operational precision of model is identical as the operational precision of the DC transmission system simulation model；
Step 3, direct current protecting definite value is set in the customized direct current protecting model, and customized direct current described in simulation run is protected
Model is protected, determines protection act of the customized direct current protecting model under direct current protecting definite value effect；
Step 4, judge whether the protection act of the customized direct current protecting model meets target call；
If it is satisfied, then exporting the check report of the direct current protecting definite value；
If conditions are not met, then adjusting the direct current protecting definite value, return step 3.
2. the check method of direct current protecting definite value according to claim 1, which is characterized in that described to make by oneself in step 202
The component part of adopted direct current protecting model includes: the input module for obtaining each fault data, for being arranged 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 movement；Wherein,
The input module and the setup module are connect with the data input pin signal of the Logic control module respectively, institute
The data output end for stating Logic control module is connect with the output module signal.
3. the check method of direct current protecting definite value according to claim 2, which is characterized in that the setup module is to described
The adjustment of direct current protecting definite value, comprising:
The setup module limits the threshold value of the direct current protecting type；And/or
The setup module limits the delay nargin of the direct current protecting type.
4. according to the check method of the described in any item direct current protecting definite values of claim 2-3, which is characterized in that described customized
The building method of direct current protecting model further include:
Step 204, examine whether the customized direct current protecting model is correctly built；
If correct, the customized direct current protecting model is run；
If incorrect, each component part of the customized direct current protecting model is redefined, is carried out described customized straight
Stream protection model is built again.
5. the check method of direct current protecting definite value according to claim 4, which is characterized in that in step 204, described in inspection
The method whether customized direct current protecting model is correctly built includes:
Test data is chosen, the test data is distinguished into input direct-current protective standard model and the customized direct current protecting mould
Type obtains operation result and the customized direct current protecting model of the direct current protecting master pattern on EMTDC platform
Operation result on the operation platform；
Judge the operation result of the customized direct current protecting model, if the operation result with the direct current protecting master pattern
It is identical；
If identical, the customized direct current protecting model is correctly built；
If it is not the same, then the customized 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 |
| 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 |
| CN110058101B (en) * | 2019-05-15 | 2022-02-08 | 国家电投集团河南电力有限公司 | Accuracy detection method, device, equipment and system for thermal protection constant 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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