CN105896531B - A kind of calculation and analysis methods that power grid is impacted based on the short-circuit test of PSD-BPA - Google Patents
A kind of calculation and analysis methods that power grid is impacted based on the short-circuit test of PSD-BPA Download PDFInfo
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- CN105896531B CN105896531B CN201610283155.XA CN201610283155A CN105896531B CN 105896531 B CN105896531 B CN 105896531B CN 201610283155 A CN201610283155 A CN 201610283155A CN 105896531 B CN105896531 B CN 105896531B
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- 238000012360 testing method Methods 0.000 title claims abstract description 105
- 238000004458 analytical method Methods 0.000 title claims abstract description 27
- 238000004364 calculation method Methods 0.000 title claims abstract description 22
- 238000002474 experimental method Methods 0.000 claims abstract description 10
- 238000012986 modification Methods 0.000 claims abstract description 4
- 230000004048 modification Effects 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 10
- 238000009863 impact test Methods 0.000 abstract description 8
- 238000004088 simulation Methods 0.000 abstract description 5
- 210000003296 saliva Anatomy 0.000 description 11
- 230000005611 electricity Effects 0.000 description 5
- 230000001052 transient effect Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000035939 shock Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 230000000153 supplemental effect Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Locating Faults (AREA)
Abstract
The present invention relates to a kind of calculation and analysis methods impacted based on the short-circuit test of PSD-BPA to power grid, technical characterstic is the following steps are included: step 1, determining the short-circuit test ability at short-circuit test station；Step 2 calculates equivalent short circuit impedance value of the short-circuit test station transformer high-voltage side gusset under the nominal short-cirucit capacity of short-circuit test station using the FLT failure card mold type of PSD-BPA；Step 3, modification short-circuit test station special circuit impedance parameter data；Step 4, the three-phase shortcircuit FLT failure card for writing short-circuit test station special line experiment station side gusset, and carry out multilayer output feedback network；Step 5 checks that PSD stablizes the voltage dip depth of system points of common connection and associated bus in the calculated result file of file swi, and obtains analysis conclusion according to calculated result.The present invention is able to solve the calculating problem analysis that short-circuit test impacts power grid, realizes the accurate simulation of short-circuit impact test and the accurate emulation to power grid impact.
Description
Technical field
The invention belongs to power system voltages temporarily to drop analysis technical field, be related to special user access network voltage temporarily drop divide
Analysis, especially a kind of calculation and analysis methods that power grid is impacted based on the short-circuit test of PSD-BPA.
Background technique
The power quality for guaranteeing power network safety operation and qualification is power-generating enterprise and the common responsibility of user, because
This, special user must carry out relevant calculating according to its load character when accessing electric system and analyze, to check its access
Influence to electric system.Large-scale short-circuit test station is exactly a kind of special user, and test process is equivalent to distant place of system
Temporary short-circuit process will generate impact to system, and influence the normal operation of electric system and other users.
Currently, typical scenario when existing short-circuit test station access electric system is as follows: 35kV examination is built at short-circuit test station
Special substation one is tested, interior transformer of standing is determined according to short-circuit test capacity situation, generally 2 or so, transformer voltage
Grade is 35kV/0.42kV, 35kV side of the short-circuit test station power supply from location 220kV synergic system station.Its short-circuit test
System schematic and short-circuit test process flow chart are as depicted in figs. 1 and 2, and the 35KV outgoing line side of Jin Zhanggui 220V substation passes through
The total wire-outgoing breaker of 35KV respectively with the first impact test transformer and the second impact test transformer phase in short-circuit test station
Connection, the first impact test transformer and the second impact test transformer are connected after being in parallel with test product impedance.
PSD-BPA is that China introduces from foreign countries and joined critical function necessary to China's Power System Analysis technology,
The a set of Chinese version power system simulation software formed, PSD-BPA trend and transient stability based on Windows operating system
And man-machine interface program, it is widely used in planning and design of power system, management and running and scientific research department, is power train
The important tool of system security and stability analysis, the rack data being built into using the software are mainly made of two parts data, first is that
Load flow calculation dat data file, second is that stability Calculation swi data file.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of based on the short-circuit test of PSD-BPA to electricity
The calculation and analysis methods for netting impact are able to solve the calculating problem analysis that short-circuit test impacts power grid, realize short-circuit impact examination
The accurate simulation tested and the accurate emulation to power grid impact.
The present invention solves its technical problem and adopts the following technical solutions to achieve:
A kind of calculation and analysis methods that power grid is impacted based on the short-circuit test of PSD-BPA, comprising the following steps:
Step 1, the nominal short-cirucit capacity by calculating short-circuit test station, determine the short-circuit test ability at short-circuit test station；
Step 2 calculates short-circuit test station transformer high-voltage side gusset in short-circuit test using the FLT failure card mold type of PSD
Equivalent short circuit impedance value under nominal short-cirucit capacity of standing；
Short-circuit test station special circuit impedance parameter data in step 3, modification PSD flow data dat file, is tried in short circuit
It tests on existing special circuit impedance parameter data of standing and increases the equivalent short circuit impedance value being calculated in step 2, modified
Special circuit impedance parameter data afterwards；
Step 4 stablizes the three-phase shortcircuit that short-circuit test station special line experiment station side gusset is write in file swi file in PSD
FLT failure card, and carry out multilayer output feedback network；
Step 5 checks that PSD stablizes system points of common connection and the electricity of associated bus in the calculated result file of file swi
Temporary drawdown degree is pressed, and analysis conclusion is obtained according to calculated result.
Moreover, the calculation formula of the nominal short-cirucit capacity at the short-circuit test station of the step 1 are as follows:
In above formula, SrFor the nominal short-cirucit capacity at short-circuit test station；U is the dedicated transformer low-pressure side electricity at short-circuit test station
Pressure；I is the dedicated transformer maximum short-circuit test electric current at short-circuit test station；
Moreover, the step 2 method particularly includes: by writing the FLT failure card at short-circuit test station, then carry out transient state
Stability Calculation, and then the transformer high-voltage side gusset at short-circuit test station is calculated under the nominal short-cirucit capacity of short-circuit test station
Equivalent short circuit impedance value.
The advantages and positive effects of the present invention are:
The present invention extends the application function of intrinsic module, first basis based on Power System Analysis tool PSD-BPA
Design data determines the short-circuit test ability of experiment station, that is, calculates the nominal short-cirucit capacity at short-circuit test station when test；Then
The equivalent short circuit impedance value of short-circuit test tiny node is calculated using the FLT failure card mold type of PSD, and then according to the equivalent impedance
Short-circuit test station special circuit impedance parameter data in BPA rack data is corrected, short-circuit test station special line experiment station is then write
The three-phase shortcircuit FLT failure card of side gusset obtains the voltage of system points of common connection and associated bus finally by Transient calculation
Temporary drawdown degree, and then analysis conclusion is obtained according to voltage dip degree.The present invention is based on PSD-BPA power system simulation software,
Simulation Calculation is built in electric network swim data basis, proposes that power grid is impacted in the short-circuit impact test based on PSD-BPA
Calculation and analysis methods, realize the accurate simulation to short-circuit impact test and the accurate emulation to power grid impact, Neng Gouzhun
Really the special user of reflection short-circuit test station type accesses electric system points of common connection and correlation caused when electric system
The voltage dip of bus can guarantee the power quality of power network safety operation and qualification well, be electric power enterprise and user
Take measures to guarantee that the safe and stable operation of power grid provides technical basis.There is the present invention very strong operability and engineering to answer
The conclusion analyzed with value, short-circuit test power grid shock calculation can formulate power supply plan for electric power enterprise and user, guarantee
Power grid security work provides accurate technology and analyzes data.
Detailed description of the invention
Fig. 1 is short-circuit test system schematic in the prior art；
Fig. 2 is short-circuit test process flow chart in the prior art；
Fig. 3 is short-circuit test of the invention to power grid shock calculation analysis flow chart diagram；
Fig. 4 is the first electric system points of common connection of the embodiment of the present invention and the voltage dip test result of associated bus
Figure；
Fig. 5 is the second electric system points of common connection of the embodiment of the present invention and the voltage dip test result of associated bus
Figure；
Fig. 6 is the electric system points of common connection of the embodiment of the present invention and the test special line current testing result of associated bus
Figure；
Fig. 7 is the third electric system points of common connection of the embodiment of the present invention and the voltage dip test result of associated bus
Figure.
Specific embodiment
A kind of calculation and analysis methods impacted based on the short-circuit test of PSD-BPA to power grid include following as shown in Figure 3
Step:
Step 1, the nominal short-cirucit capacity by calculating short-circuit test station, determine the short-circuit test ability at short-circuit test station；
The calculation formula of the nominal short-cirucit capacity at the short-circuit test station of the step 1 are as follows:
In above formula, SrFor the nominal short-cirucit capacity at short-circuit test station；U is the dedicated transformer low-pressure side electricity at short-circuit test station
Pressure；I is the maximum short-circuit test electric current at short-circuit test station；
In the present embodiment, the entitled saliva Zhang Gui at public system station, the entitled saliva fax at short-circuit test station is provided
Feasibility power supply plan shows that dedicated transformer low-pressure side voltage is U=0.42kV, and maximum short-circuit test electric current is I=
120kA, therefore the nominal short-cirucit capacity at the short-circuit test station can be calculated:
Step 2 calculates short-circuit test station transformer high-voltage side gusset in short-circuit test using the FLT failure card mold type of PSD
Equivalent short circuit impedance value under nominal short-cirucit capacity of standing；
The step 2 method particularly includes: by writing the FLT failure card at short-circuit test station, then carry out transient stability
It calculates, and then the transformer high-voltage side gusset that short-circuit test station is calculated is equivalent under the nominal short-cirucit capacity of short-circuit test station
Short-circuit impedance value.
FLT is a kind of failed operation model of simplification in PSD-BPA, and by writing FLT failure card, it is steady then to carry out transient state
Devise a stratagem is calculated, and equivalent short circuit impedance value of experiment station's transformer high-voltage side gusset under nominal short-cirucit capacity can be calculated.
In the present embodiment, the saliva fax experiment station FLT card sentence write is as follows:
FLT saliva fax S137. 31 3 0.12 10.249
0.12 and 10.249 in the above sentence are exactly the equivalent short circuit impedance value when nominal short-cirucit capacity is 87MVA,
It is to be calculated by short-circuit impedance initial value, then gradually adjusts the mode approached, under the 87MVA nominal short-cirucit capacity finally obtained
Equivalent short circuit impedance value.The equivalent short circuit impedance value Z at entire short-circuit test station is calculated in step 2eq。
The result that multilayer output feedback network obtains is as shown in the table:
* it shares 1 node and calculates three short circuit current, calculated result is as follows:
Short-circuit test station special circuit impedance parameter data in step 3, modification PSD flow data dat file, is tried in short circuit
It tests on existing special circuit impedance parameter data of standing and increases the equivalent short circuit impedance value being calculated in step 2, modified
Special circuit impedance parameter data afterwards；
In the present embodiment, by your public system station of saliva to the dedicated of fax experiment station in former PSD-BPA rack data
Line impedance supplemental characteristic is as follows:
L saliva is your S137. saliva fax S137. 1,200 0.0001 0.0001
Wherein, first 0.0001 and second 0.0001 data are the resistance per unit value and reactance per unit value of route.It repairs
The impedance value for changing above-mentioned data, the equivalent short circuit impedance value Z that will be calculated in step 2eqWith existing special circuit impedance parameter
Data are added, and obtain modified special circuit impedance parameter data, as follows:
L saliva is your S137. saliva fax S137. 1,200 0.1201 10.25
Step 4 stablizes the three-phase shortcircuit that short-circuit test station special line experiment station side gusset is write in file swi file in PSD
FLT failure card, and carry out multilayer output feedback network；Three-phase shortcircuit FLT failure card is as follows:
The failure card is meant that: three-phase shortcircuit event occurs in the fax station switch-side of saliva Zhang Guizhan to saliva fax station track road
Barrier, fault time are the 20th cycle, and failure continues to 70 cycles, i.e. failure is 1S there are the time.
Then, the multilayer output feedback network under fault condition is carried out.
Step 5 checks that PSD stablizes system points of common connection and the electricity of associated bus in the calculated result file of file swi
Temporary drawdown degree is pressed, and analysis conclusion is obtained according to calculated result.
Fig. 4 to Fig. 7 be respectively the embodiment of the present invention the first electric system points of common connection and associated bus voltage it is temporary
Test result figure drops；Second electric system points of common connection of the embodiment of the present invention and the voltage dip test result of associated bus
Figure；The electric system points of common connection of the embodiment of the present invention and the test special line current testing result figure of associated bus；The present invention
The third electric system points of common connection of embodiment and the voltage dip test result figure of associated bus；
The working principle of the invention is: PSD-BPA is a kind of Power System Analysis tool of classics, by extending natural mode
Block functional application, it is first determined then it is dedicated to correct short-circuit test station in BPA rack data for the equivalent impedance at short-circuit test station
Line impedance supplemental characteristic writes the three-phase shortcircuit FLT failure card of short-circuit test station special line experiment station side gusset, finally by soft
Part multilayer output feedback network function obtains the voltage dip depth of system points of common connection and associated bus, and then according to voltage dip
Degree obtains analysis conclusion.The present invention proposes that the short-circuit test based on PSD-BPA to power grid shock calculation analysis method, realizes
Accurate simulation to short-circuit impact test, and the accurate emulation to power grid impact.
It is emphasized that embodiment of the present invention be it is illustrative, without being restrictive, therefore packet of the present invention
Include and be not limited to embodiment described in specific embodiment, it is all by those skilled in the art according to the technique and scheme of the present invention
The other embodiments obtained, also belong to the scope of protection of the invention.
Claims (3)
1. a kind of calculation and analysis methods impacted based on the short-circuit test of PSD-BPA to power grid, it is characterised in that: including following step
It is rapid:
Step 1, the nominal short-cirucit capacity by calculating short-circuit test station, determine the short-circuit test ability at short-circuit test station；
Step 2 calculates short-circuit test station transformer high-voltage side gusset in short-circuit test using the FLT failure card mold type of PSD-BPA
Equivalent short circuit impedance value under nominal short-cirucit capacity of standing；
Short-circuit test station special circuit impedance parameter data in step 3, modification PSD flow data dat file, at short-circuit test station
Increase the equivalent short circuit impedance value being calculated in step 2 on existing special circuit impedance parameter data, obtains modified
Special circuit impedance parameter data；
Step 4 stablizes the three-phase shortcircuit FLT event that short-circuit test station special line experiment station side gusset is write in file swi file in PSD
Barrier card, and carry out multilayer output feedback network；
Step 5 checks that system points of common connection and the voltage of associated bus are temporary in the calculated result file of the stable file swi of PSD
Drawdown degree, and analysis conclusion is obtained according to calculated result.
2. a kind of calculation and analysis methods that power grid is impacted based on the short-circuit test of PSD-BPA according to claim 1,
It is characterized in that: the calculation formula of the nominal short-cirucit capacity at the short-circuit test station of the step 1 are as follows:
In above formula, SrFor the nominal short-cirucit capacity at short-circuit test station；U is the dedicated transformer low-pressure side voltage at short-circuit test station；I
For the dedicated transformer maximum short-circuit test electric current at short-circuit test station.
3. a kind of calculating analysis side impacted based on the short-circuit test of PSD-BPA to power grid according to claim 1 or 2
Method, it is characterised in that: the step 2 method particularly includes: by writing the FLT failure card at short-circuit test station, then carry out temporary
State stability Calculation, and then the transformer high-voltage side gusset at short-circuit test station is calculated under the nominal short-cirucit capacity of short-circuit test station
Equivalent short circuit impedance value.
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| CN110489793B (en) * | 2019-07-12 | 2022-05-31 | 广西电网有限责任公司电力科学研究院 | PSD power station identification and fault operation model generation method |
| CN111009894B (en) * | 2019-11-27 | 2023-03-21 | 国网山东省电力公司经济技术研究院 | Comparison and selection method and system for access scheme of power transmission and distribution equipment detection center |
| CN112946550A (en) * | 2020-12-30 | 2021-06-11 | 广东电网有限责任公司电力科学研究院 | On-line checking method and device for circuit breaker parameters based on short-circuit current |
| CN114069872B (en) * | 2021-11-26 | 2024-01-23 | 广东电网有限责任公司江门供电局 | Power distribution terminal based on modularized configuration and topology model verification method and device thereof |
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