CN106291177B - Electromagnetic disturbance analysis method of the Intruding wave to intelligent substation component and communication equipment - Google Patents
Electromagnetic disturbance analysis method of the Intruding wave to intelligent substation component and communication equipment Download PDFInfo
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- CN106291177B CN106291177B CN201610616925.8A CN201610616925A CN106291177B CN 106291177 B CN106291177 B CN 106291177B CN 201610616925 A CN201610616925 A CN 201610616925A CN 106291177 B CN106291177 B CN 106291177B
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- communication equipment
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/001—Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing
Abstract
The invention belongs to field of power system more particularly to a kind of Intruding waves to the electromagnetic disturbance analysis method of intelligent substation component and communication equipment, comprising: the given common lightning current I in substation region and substation operation mode；Shaft tower and transforming plant primary system model are established if lightning stroke shaft tower mode according to Substation Bus Arrangement figure；If switch mode of operation, then transforming plant primary system model is established；Calculate voltage transformer primary side voltage U1；Establish voltage transformer cable model；The secondary cable end disturbance voltage U being connected with intelligent assembly and communication equipment is obtained according to voltage transformer cable model.To the electromagnetic disturbance of intelligent assembly and communication equipment when appraisal procedure of the invention can be simple, effective and intuitively assesses two kinds of failures of substation, be conducive to that the anti-electromagnetic interference of secondary equipment of intelligent converting station is reliably designed and constructed.
Description
Technical field
The invention belongs to field of power system more particularly to a kind of Intruding waves to intelligent substation component and communication equipment
Electromagnetic disturbance analysis method.
Background technique
When intelligent substation intelligent assembly and communication equipment are operated by lightening strikes shaft tower or switch, the harassing and wrecking electric current of generation
Electrical secondary system can be entered along conducting wire and cable, may cause intelligent assembly and communication equipment malfunction or damage, and then lead to one
Secondary device malfunction, to tripping power failure, the even failures such as equipment damage occur.Therefore thunder and lightning shaft tower and switch operation are to power transformation
It stands intelligent assembly and communication equipment influence is one of an important factor for causing substation fault.In addition, China carries out energetically
Comprehensive automation of electric power system technology, the chemical conversion on the spot of the integrated and intelligent assembly and communications device apparatus of intelligent high-voltage equipment
For new developing direction, intelligent assembly and communication equipment have become the secondary device of static type of new generation, and by several novel micro-
Electronic equipment composition, they are typically mounted on by a high-tension apparatus, this makes electromagnetic compatibility problem in substation more prominent.
The influence of thunder and lightning shaft tower, switch operation to intelligent substation component and communication equipment is reduced, intelligent assembly must be just calculated
And the electromagnetic disturbance situation of communication equipment, practicable anti-electromagnetic disturbance technical solution on economic technology is formulated, thus scientific
, reasonable design, construction and the transformation for carrying out intelligent substation component and communication equipment.Therefore, how simply, effectively and
The intuitively electromagnetic disturbance situation of analytical calculation intelligent substation component and communication equipment is anti-to transformer station secondary system facility
The key factor of disturbance-proof design.
Summary of the invention
A kind of electromagnetic disturbance analysis the object of the present invention is to provide Intruding wave to intelligent substation component and communication equipment
Method can simple, effectively and intuitively calculate the electromagnetic disturbance of intelligent substation component and communication equipment, be conducive to intelligence
Energy transformer station secondary system is protected, and proposes reliable protection measure, reaches raising intelligent assembly and communication equipment is reliable for operation
The purpose of property.
To achieve the goals above, The technical solution adopted by the invention is as follows: a kind of Intruding wave is to intelligent substation component
And the electromagnetic disturbance analysis method of communication equipment, comprising the following steps:
Step 1: the given common lightning current I in substation region and substation operation mode；
Step 2: lightning stroke shaft tower and transforming plant primary system are established if lightning stroke shaft tower mode according to Substation Bus Arrangement figure
System model；If switch mode of operation, then transforming plant primary system model is established；
Step 3: calculating voltage transformer primary side voltage U1；
Step 4: establishing voltage transformer and cable model；
Step 5: the secondary electricity being connected with intelligent assembly and communication equipment is calculated according to voltage transformer and cable model
Cable end disturbance voltage U.
The voltage transformer and cable model are by cable unit parameter, cable wave impedance Z2, cable length L, condenser type
Voltage transformer parameter, grounded screen impedance Z1, interference source UG, secondary cable load impedance ZL, lead-in inductance L1, input impedance ZIN、
Propagation constant r, source impedance ZSIt determines.
The specific calculating formula of disturbance voltage U on the secondary cable are as follows:
The interference source UGSpecific calculating process are as follows:
ZGFor grounded screen impedance, LGFor lead-in inductance, C1、C2For the derided capacitors of capacitance type potential transformer, C3For capacitor
The parasitic capacitance of formula voltage transformer, ZINFor input impedance.
The specific calculating process of propagation constant r are as follows:Z0For the series impedance of cable unit length, Y0For electricity
The shunt admittance of cable unit length.
The source impedance ZSSpecific calculating process are as follows:C2For capacitance type potential transformer
Derided capacitors.
The beneficial effects of the present invention are: it is based on the practical primary system wiring side of the common lightning current in this area and substation
Formula, so that the calculation method is more accurate targetedly.Importantly, the electromagnetism of intelligent substation component and communication equipment is disturbed
It disturbs computation modeling and considers propagation oscillation of the wave in conducting wire, calculated disturbance voltage is closer to truth, so that becoming
Power station intelligent assembly and communication equipment harassing and wrecking calculating are simpler, effective and intuitive, so that progress is more scientific, is directed to
Property intelligent substation component and communication equipment electromagnetic protection work.
Detailed description of the invention
Fig. 1 is electromagnetic disturbance analysis method steps flow chart of the Intruding wave of the present invention to intelligent substation component and communication equipment
Figure；
Fig. 2 is voltage transformer and cable model equivalent circuit of the invention；
Fig. 3 is present invention lightning stroke shaft tower to intelligent assembly and communication equipment electromagnetic disturbance schematic diagram of calculation result；
Fig. 4 is switch operation to intelligent assembly and communication equipment electromagnetic disturbance schematic diagram of calculation result.
Specific embodiment
As shown in Figure 1, a kind of electromagnetic disturbance of the Intruding wave of the present invention to intelligent substation component and communication equipment
Analysis method, comprising the following steps:
Step 1: the given common lightning current I in substation region and substation operation mode；
Step 2: shaft tower and transforming plant primary system mould are established if lightning stroke shaft tower mode according to Substation Bus Arrangement figure
Type；If switch mode of operation, then transforming plant primary system model is established；
Step 3: calculating voltage transformer primary side voltage U1；
Step 4: establishing voltage transformer and cable model；
Step 5: the secondary electricity being connected with intelligent assembly and communication equipment is calculated according to voltage transformer and cable model
Cable end disturbance voltage U.
Voltage transformer and cable model are as shown in Fig. 2, derided capacitors and ground lead by CVT produce secondary cable
Raw Conducted EMI model establishes equivalent circuit.
Intruding wave of the invention is to the electromagnetic disturbance analysis method of intelligent substation component and communication equipment, in conjunction with substation
The lightning current I and waveform in region, substation use the method for operation " line one change " of over-voltage condition most serious when breaking down,
Transforming plant primary system model is established according to the practical electrical primary main electrical scheme wiring diagram of substation, calculates bus overvoltage U1, build
Vertical voltage transformer and secondary cable model, then can calculate cable end piece disturbance voltage U is that intelligent assembly and communication equipment are disturbed
Disturb voltage.It is based on the practical primary system mode of connection of the common lightning current in this area and substation, so that the calculating side that it, which is calculated,
Method is more accurate targetedly.Importantly, the electromagnetic disturbance computation modeling of intelligent substation intelligent assembly and communication equipment
Propagation oscillation of the wave in conducting wire is considered, calculated disturbance voltage is closer to truth, so that intelligent substation group
Part and communication equipment harassing and wrecking calculating are simpler, effective and intuitive, to carry out more scientific, targeted substation
Intelligent assembly and the work of communication equipment electromagnetic protection.
The present invention may cause intelligent substation intelligent assembly for Intruding wave and communication equipment fault is studied, thunder and lightning
The overvoltage that shaft tower or switch operation generate, passes sequentially through transmission line of electricity, primary equipment, mutual inductor, cable transmission and enters power transformation
Intelligent assembly and communication equipment in standing.According to the time domain parameter of IEC 61000-4-18 code test waveform, only give altogether
The test class of mode voltage, taking differential mode voltage is common-mode voltage half, as grade 1:0.25kV；Grade 2:0.5kV；Grade 3:
1kV；Class 4: 2kV；What GB/T17626.5-2008 EMC test and measuring technique surge impact immunity experiment required
The immunity limit of maximum 4kV.Calculated result can be with the Comparison of standards, to carry out more scientific, targeted power transformation
Stand intelligent assembly and communication equipment electromagnetic protection work.Specifically, the lightning stroke shaft tower and switch operation primary system model are true
Surely busbar voltage U is obtained1；Secondary cable end disturbance voltage can be obtained in the determination of the voltage transformer and secondary cable model
U.Specifically, the voltage transformer and secondary cable model can (include: Z by cable unit parameter0、Y0), cable wave impedance
Z2, cable length L, capacitance type potential transformer parameter (include: derided capacitors C1、C2, parasitic capacitance C3), grounded screen impedance Z1、
Interference source UGSecondary cable load impedance ZL, lead-in inductance L1, input impedance ZIN, propagation constant r, source impedance ZSIt determines.Specifically
, the specific calculating process of propagation constant r are as follows:The source impedance ZSSpecific calculating process are as follows:The input impedance ZINIt is specific to calculate are as follows:WhereinThe interference source UGU1 Fourier transformation need to be calculated, specific calculating process are as follows:U at this timeGFor frequency domain value；Institute
The disturbance voltage U stated on the secondary cable connecting when lightning stroke shaft tower is operated with switch with intelligent assembly and communication equipment is specifically calculated
Process are as follows:And by U inversefouriertransform at time domain, U is smart group at this time
Part and communication equipment disturbance voltage.
Analysis method according to the present invention, to certain 110kV substation lightning stroke shaft tower and switch operational circumstances computational intelligence group
Part and communication equipment disturbance voltage, calculated result such as attached drawing 3,4, be struck by lightning shaft tower peak value 905.5V, switch operation peak value
880.1V being below immunity limit.By attached drawing can it is visual and clear find out the intelligent substation intelligent assembly and communication set
Disturbance voltage situation when standby lightning stroke shaft tower and switch operation, so as to help intelligent substation component and communication equipment to carry out more
Scientifically, targetedly anti-electromagnetic disturbance design work.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., is all included in the scope of protection of the present invention.
Claims (5)
1. a kind of Intruding wave is to the electromagnetic disturbance analysis method of intelligent substation component and communication equipment, which is characterized in that including
Following steps:
Step 1: the given common lightning current I in substation region and substation operation mode；
Step 2: lightning stroke shaft tower and transforming plant primary system mould are established if lightning stroke shaft tower mode according to Substation Bus Arrangement figure
Type；If switch mode of operation, then transforming plant primary system model is established；
Step 3: calculating voltage transformer primary side voltage U1；
Step 4: establishing voltage transformer and cable model；
Step 5: the secondary cable end being connected with intelligent assembly and communication equipment is calculated according to voltage transformer and cable model
Hold disturbance voltage U；
The voltage transformer and cable model are by cable unit parameter, cable wave impedance Z2, cable length L, capacitor voltage it is mutual
Sensor parameter, grounded screen impedance Z1, interference source UG, secondary cable load impedance ZL, lead-in inductance L1, input impedance ZIN, propagate it is normal
Number r and source impedance ZSIt determines.
2. method according to claim 1, which is characterized in that the specific calculating formula of disturbance voltage U on the secondary cable are as follows:
Z0For the series impedance of cable unit length.
3. method according to claim 1, which is characterized in that the interference source UGSpecific calculating process are as follows:
ZGFor grounded screen impedance, LGFor lead-in inductance, C1、C2For the derided capacitors of capacitance type potential transformer, C3For capacitive battery
Press the parasitic capacitance of mutual inductor, ZINFor input impedance.
4. method according to claim 1, which is characterized in that the specific calculating process of propagation constant r are as follows:Z0
For the series impedance of cable unit length, Y0For the shunt admittance of cable unit length.
5. method according to claim 1, which is characterized in that the source impedance ZSSpecific calculating process are as follows:C2For the derided capacitors of capacitance type potential transformer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610616925.8A CN106291177B (en) | 2016-07-28 | 2016-07-28 | Electromagnetic disturbance analysis method of the Intruding wave to intelligent substation component and communication equipment |
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| CN201610616925.8A CN106291177B (en) | 2016-07-28 | 2016-07-28 | Electromagnetic disturbance analysis method of the Intruding wave to intelligent substation component and communication equipment |
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| CN106291177B true CN106291177B (en) | 2019-04-23 |
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| CN110275078B (en) * | 2019-07-16 | 2021-10-15 | 国网江苏省电力有限公司电力科学研究院 | Method and system for distinguishing secondary cable ground loop disturbance of transformer substation and storage medium |
| CN114089023A (en) * | 2021-11-12 | 2022-02-25 | 中国南方电网有限责任公司超高压输电公司梧州局 | Detection method and device for secondary cable disturbance voltage by VFTO and computer equipment |
Citations (4)
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|---|---|---|---|---|
| US6392396B1 (en) * | 2000-06-13 | 2002-05-21 | Rockwell Collins, Inc. | Electromagnetic interference pulse generator for lightning testing of electronic equipment |
| CN103558484A (en) * | 2013-11-16 | 2014-02-05 | 沈阳工业大学 | Substation cable lightning strike interference detecting device and method |
| CN203688680U (en) * | 2013-11-16 | 2014-07-02 | 沈阳工业大学 | Apparatus for detecting lightning stroke interference of cables in transformer station |
| CN103913661A (en) * | 2014-04-09 | 2014-07-09 | 华北电力大学（保定） | Method for estimating influences on telecommunication cable E1 wire by electromagnetic disturbance |
-
2016
- 2016-07-28 CN CN201610616925.8A patent/CN106291177B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6392396B1 (en) * | 2000-06-13 | 2002-05-21 | Rockwell Collins, Inc. | Electromagnetic interference pulse generator for lightning testing of electronic equipment |
| CN103558484A (en) * | 2013-11-16 | 2014-02-05 | 沈阳工业大学 | Substation cable lightning strike interference detecting device and method |
| CN203688680U (en) * | 2013-11-16 | 2014-07-02 | 沈阳工业大学 | Apparatus for detecting lightning stroke interference of cables in transformer station |
| CN103913661A (en) * | 2014-04-09 | 2014-07-09 | 华北电力大学（保定） | Method for estimating influences on telecommunication cable E1 wire by electromagnetic disturbance |
Non-Patent Citations (1)
| Title |
|---|
| 变电站内智能组件电磁干扰耦合模型的研究;王昊天;《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》;20160315(第03期);C042-1070-第5-40页 |
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Granted publication date: 20190423 Termination date: 20200728 |