CN106961159A - A kind of earth current energy storage and recoverying and utilizing method - Google Patents
A kind of earth current energy storage and recoverying and utilizing method Download PDFInfo
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- CN106961159A CN106961159A CN201710293787.9A CN201710293787A CN106961159A CN 106961159 A CN106961159 A CN 106961159A CN 201710293787 A CN201710293787 A CN 201710293787A CN 106961159 A CN106961159 A CN 106961159A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000001172 regenerating effect Effects 0.000 claims abstract description 28
- BGOFCVIGEYGEOF-UJPOAAIJSA-N helicin Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@H]1OC1=CC=CC=C1C=O BGOFCVIGEYGEOF-UJPOAAIJSA-N 0.000 claims abstract description 3
- 230000005540 biological transmission Effects 0.000 claims description 8
- 230000010354 integration Effects 0.000 claims description 4
- 230000004323 axial length Effects 0.000 claims description 3
- 238000010494 dissociation reaction Methods 0.000 claims description 3
- 230000005593 dissociations Effects 0.000 claims description 3
- 230000006870 function Effects 0.000 claims description 3
- 230000035699 permeability Effects 0.000 claims description 3
- 230000005055 memory storage Effects 0.000 claims description 2
- 239000002689 soil Substances 0.000 abstract description 9
- 238000004064 recycling Methods 0.000 abstract description 4
- 239000004744 fabric Substances 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 3
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001131 transforming effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- 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
- H02J15/00—Systems for storing electric energy
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention discloses a kind of earth current energy storage and recoverying and utilizing method, spiral helicine spiral grounding body is connected with downlead, spiral grounding body is horizontally embedded in underground, and the electric energy of the earth current through downlead, which is concentrated, to be stored in the helical form chamber of spiral grounding body；Energy regenerating resonance coil is set in the secondary side of spiral grounding body, secondary side circuit parameter is adjusted, realizes the utilization of power in the helical form chamber of spiral grounding body.Grounding body axial cloth pole space can not only be reduced by the present invention, be stored in electric energy concentration in helical structure ground connection body cavity in soil and by extracting the electromagnetic energy that this part is stored in helical cavity with energy regenerating resonance coil, so as to realize the recycling to entering ground electric energy.
Description
Technical field
The invention belongs to field of power, and in particular to a kind of earth current energy storage and recoverying and utilizing method.
Background technology
The neutral-point solid ground method of operation is used power transmission and transforming equipment in 110kV and above power system more.It is long-term by three
The imbalance and short trouble of phase electric load cause there is earth current for a long time in power transmission and transforming equipment neutral earthing devices.For
Ensure that generally this part of earth current is overflow by earthing or grounding means progress electric current in power system reliability service, engineering and dissipate.
Grounding body is the major part of earthing or grounding means, water of the current most of grounding bodies to be made of mild steel or band steel
Based on flat, Grounding Grids.Suitable diffusing effect can reach using above-mentioned grounding body in engineering, but level, vertical stratification
Grounding body diffusing essence is dissipated in the electric energy of earth current in the soil of infinity, causes a certain degree of electric energy wave
Take.This part of electric energy can be recycled using spiral grounding body, so as to realize that electric energy service efficiency rises to target.
The content of the invention
In consideration of it, the present invention concentrates on the thought of some borderline region based on will enter ground electric energy, it is grounded using helical structure
The electric energy of earth current is concentrated and is stored in helical form chamber by body；Further to realize the sharp again of the electromagnetic energy stored in chamber
With the present invention proposes to arrange energy regenerating resonance coil and interlock circuit in secondary side based on resonance type wireless transmission theory system
Realize and the electric energy stored in soil in helical form chamber is recycled.
The present invention is adopted the following technical scheme that to achieve these goals：A kind of earth current energy storage and recycling side
Method, it is characterised in that：Spiral helicine spiral grounding body is connected with downlead, spiral grounding body is horizontally embedded in underground, through drawing
The electric energy of offline earth current is concentrated and is stored in the helical form chamber of spiral grounding body；Set in the secondary side of spiral grounding body
Energy regenerating resonance coil, adjusts secondary side circuit parameter, realizes the utilization of power in the helical form chamber of spiral grounding body.Energy
The central shaft of the central shaft and spiral grounding body that reclaim resonance coil is arranged on same axis.
The electric energy P of the helical form chamber memory storage of the spiral grounding body and the equivalent inductance L of spiral grounding body calculate public
Formula is as follows：
In formula：I represents earth current, μ0Represent space permeability, ncRepresent circle electricity
Current density, λ represents dissociation constant, J1(t) first kind first-order bessel function is represented, D represents spiral grounding body axial length, r1
Represent spiral grounding body internal coil diameter, r2Represent that spiral grounding body coil outer diameter, t represent integration variable.
In such scheme, circuit parameter includes the loop current i of primary side spiral grounding bodysIt is humorous with secondary side energy regenerating
Shake wire loop electric current iL, spiral ground connection body loop equiva lent impedance Z1EWith energy regenerating resonance coil loop equiva lent impedance Z2E, it
Computing formula be respectively：
uinFor the equivalent AC voltage source of earth current, R1For the equivalent resistance of spiral grounding body, R2It is humorous for energy regenerating
Shake the equivalent resistance of coil, RLFor load, ω is Transmission system angular frequency, Z1For spiral grounding body self-impedance, Z2For energy regenerating
Resonance coil self-impedance, M is the equivalent mutual inductance between spiral grounding body and energy regenerating coil.
The electric energy of earth current can not only be concentrated and be stored in helical form chamber in soil media using this method, can also be real
Now this part of electric energy is recycled, so as to improve the service efficiency of electric energy.
Brief description of the drawings
Fig. 1 is helical structure grounding body and downlead connected mode schematic diagram；
Fig. 2 is spiral grounding body coil energy computation model；
Fig. 3 is that energy storage recycles equivalent-circuit model；
Fig. 4 is that earth current energy storage recycles architecture model.
Embodiment
The invention mainly comprises two parts of spiral grounding body and energy regenerating resonance coil secondary circuit.Spiral grounding body
Formed using mild steel coiling, it is contemplated that in engineering at grounding body caused by horizontal grounding body end effect and downlead node
Corrosion fracture situation, based on making the thought seamlessly transitted of earth current, the connected mode of spiral grounding body and downlead should be as
Shown in Fig. 1.The electromagnetic energy stored in spiral ground connection shape chamber in soil is extracted to maximize, energy regenerating resonance coil should be with
Spiral grounding body is in same axis.
1) storage electrical energy parameter in spiral ground connection body cavity is obtained
The energy storage of spiral grounding body is relevant with corresponding inductive effect, in the hope of setting up meter based on uncoiling grounding body inductance parameters
Model is calculated as shown in Fig. 2 set earth current I, spiral ground connection body coil total number of turns N, shared by spiral grounding body coil-winding region
Space is V', and area of section is S0.Then m circles wire institute linkage magnetic linkage ψmFor：
In formula：The magnetic flux density that B-hot-wire coil is produced；
Sm- coil m circle wires surround curved surface；
lm- coil m circle wires surround the border of curved surface；
A-it is vector magnetic potential；
S-it is integral area variable；
L-it is path of integration variable.
Bring coil current density into and write out the total magnetic linkage ψ of all coils number of turn and be：
J in formulacFor volume current density, V ' is volume variation per minute.
It is expressed as follows according to above-mentioned inductance L：
Energization air-cored cylindrical coil vector magnetic potential has axial componentUsing cylindrical-coordinate system, arbitrfary point (ρ, φ, z)
Locate vector magnetic potential A and current density, JCIt is equidirectional, so：
D is axial length, r in formula1For internal coil diameter, r2Integration variable is for coil outer diameter, ρ ' and z '.
Spiral grounding body is equivalent to any point P in the coil of N circles, space all will be in-D/2<z<In D/2 region, P
Point where xOy faces by whole cylindrical space divide into above and below two parts.Selected certain point P, obtains upper and lower two parts coil
The vector magnetic potential of P points when electric current is acted on respectively, the resultant vector magnetic potential finally tried to achieve with addition method theorem at the P of engineering midpoint can table
It is shown as：
In formulaμ0For space permeability, λ is a dissociation constant, J1(*) represents the
One class first-order bessel function, t is integration variable.
Convolution (4) (5) finally arranges the equivalent inductance value L that can try to achieve spiral grounding body and P points of the electric energy of storage is
It is as follows：
Wherein ncFor bar-type current density.
2) parameter that electric energy recycles equivalent circuit is obtained
According to the electromagnetic energy characteristic stored in soil in spiral grounded chamber, resonance type wireless transmission theory system cloth is utilized
Put with the coaxial energy regenerating resonance coil of spiral grounding body, regulation secondary side circuit parameter, realize electromagnetic energy secondary recovery profit
With.
For accurate description spiral grounding body and secondary side energy regenerating resonance coil parameter, circuit model is built such as Fig. 3 institutes
Show.Wherein, uinFor the equivalent AC voltage source of earth current, L1、C1、R1For the equivalent inductance of spiral grounding body, electric capacity, resistance,
L2、C2、R2For the equivalent inductance of energy regenerating resonance coil, electric capacity, resistance, RLIt is load circuit.If Transmission system angular frequency is
ω, then spiral grounding body and energy regenerating resonance coil self-impedance are respectively：
According to KVL loop equation can in the hope of primary side spiral grounding body loop current isWith secondary side energy regenerating
The loop current i of resonance coilLRespectively：
Knowable to above formula, the spiral ground connection body coil L after resonance coupling1, energy regenerating resonance coil L2The resistance in two loops
It is anti-to generate change, L1Sense L2Coupled impedance Z21And L2Sense L1Coupled impedance Z12RespectivelyBecause Z1And Z2Both resistance and reactance, therefore reflected umpedance Z are contained21And Z21In equally
Contain resistance and reactance.Reflected resistance and reflected reactance can be impacted to loop, and the particularly nearlyer impact effect of distance is brighter
It is aobvious.In order to reduce influence of the reflected reactance to loop resonance frequency, spiral grounding body and energy regenerating resonance coil can be made equivalent
Inductance is in resonant condition.Now reflected umpedance is zero, and the reflected umpedance in two loops is respectivelyWithIn this state, the equivalent coil L of two generation resonance1And L2Loop is pure resistance loop, wherein spiral
It is grounded body loop and energy regenerating resonance coil loop equiva lent impedance Z1EAnd Z2ERespectively：
By obtaining above-mentioned equivalent circuit parameter, spiral ground connection body loop and energy regenerating resonance coil are further analyzed
The electromagnetic relationship of secondary circuit, has drawn the energy transfer efficiency of the equivalent-circuit model recycled based on earth current electric energy
η is as follows：
Referring to Fig. 4, the key technology that earth current energy storage is recycled is firstly the need of a kind of helical structure grounding body of utilization
Part is overflow and dissipated in the soil that electric energy concentration is stored in the helical form chamber of grounding body.Soil is stored in for further recycling
In this part energy, transmitted electricity correlation theory system with reference to resonance type wireless, arrangement one is same on spiral ground connection body axis
The electric energy that axle resonance receiving coil and interlock circuit are grounded to spiral in body cavity in soil carries out extraction and application.By the way that spiral is connect
Ground body and wireless power transmission theoretical system are combined, and realize the recycling to entering ground electric energy.
Claims (5)
1. a kind of earth current energy storage and recoverying and utilizing method, it is characterised in that：By spiral helicine spiral grounding body and downlead
Connection, spiral grounding body is horizontally embedded in underground, and the electric energy of the earth current through downlead, which is concentrated, is stored in spiral grounding body
In helical form chamber；Energy regenerating resonance coil is set in the secondary side of spiral grounding body, secondary side circuit parameter is adjusted, realizes spiral shell
Revolve the utilization of power in the helical form chamber of grounding body.
2. a kind of earth current energy storage and recoverying and utilizing method according to claim 1, it is characterised in that：The energy regenerating
The central shaft of resonance coil is arranged on same axis with the central shaft of spiral grounding body.
3. a kind of earth current energy storage according to claim 1 or claim 2 and recoverying and utilizing method, it is characterised in that：The spiral
The electric energy P of the helical form chamber memory storage of grounding body and the equivalent inductance L computing formula of spiral grounding body are as follows：
In formula：I represents earth current, μ0Represent space permeability, ncRepresent that circle electric current is close
Degree, λ represents dissociation constant, J1(t) first kind first-order bessel function is represented, D represents spiral grounding body axial length, r1Represent
Spiral grounding body internal coil diameter, r2Represent that spiral grounding body coil outer diameter, t represent integration variable.
4. a kind of earth current energy storage and recoverying and utilizing method according to claim 3, it is characterised in that：Circuit parameter includes
The loop current i of primary side spiral grounding bodysWith secondary side energy regenerating resonance coil loop current iL, spiral ground connection body loop
Equiva lent impedance Z1EWith energy regenerating resonance coil loop equiva lent impedance Z2E, their computing formula is respectively：
uinFor the equivalent AC voltage source of earth current, R1For the equivalent resistance of spiral grounding body, R2For energy regenerating resonance coil
Equivalent resistance, RLFor load, ω is Transmission system angular frequency, Z1For spiral grounding body self-impedance, Z2For energy regenerating resonance line
Self-impedance is enclosed, M is the mutual inductance between spiral grounding body and energy regenerating coil.
5. a kind of earth current energy storage and recoverying and utilizing method according to claim 4, it is characterised in that：Also include calculating spiral shell
The energy transfer efficiency η spun between ground body loop and energy regenerating resonance coil loop：
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710293787.9A CN106961159B (en) | 2017-04-28 | 2017-04-28 | A kind of earth current energy storage and recoverying and utilizing method |
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| CN201710293787.9A CN106961159B (en) | 2017-04-28 | 2017-04-28 | A kind of earth current energy storage and recoverying and utilizing method |
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| CN106961159A true CN106961159A (en) | 2017-07-18 |
| CN106961159B CN106961159B (en) | 2019-07-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108599348A (en) * | 2018-07-10 | 2018-09-28 | 广东电网有限责任公司 | Substation ground network electric energy recovering system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203365527U (en) * | 2013-07-31 | 2013-12-25 | 国家电网公司 | Feeder cable jacket grounding current collector |
| CN204116526U (en) * | 2014-11-18 | 2015-01-21 | 国家电网公司 | Iron core grounding electric current on-Line Monitor Device |
-
2017
- 2017-04-28 CN CN201710293787.9A patent/CN106961159B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203365527U (en) * | 2013-07-31 | 2013-12-25 | 国家电网公司 | Feeder cable jacket grounding current collector |
| CN204116526U (en) * | 2014-11-18 | 2015-01-21 | 国家电网公司 | Iron core grounding electric current on-Line Monitor Device |
Non-Patent Citations (1)
| Title |
|---|
| MASANORI IGARASHI等: "SFQ Pulse Transfer Circuits Using Inductive Coupling for Current Recycling", 《IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108599348A (en) * | 2018-07-10 | 2018-09-28 | 广东电网有限责任公司 | Substation ground network electric energy recovering system |
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| CN106961159B (en) | 2019-07-12 |
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Effective date of registration: 20191101 Address after: 400044 Shapingba District Sha Street, No. 174, Chongqing Co-patentee after: GUIYANG BUREAU, EHV POWER TRANSMISSION COMPANY, CHINA SOUTHERN POWER GRID Co.,Ltd. Patentee after: Chongqing University Address before: 400044 Shapingba District Sha Street, No. 174, Chongqing Patentee before: Chongqing University |
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Granted publication date: 20190712 |
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