CN108832539A - A kind of online de-icing method using the energy storage device optimization transmission line of electricity method of operation - Google Patents
A kind of online de-icing method using the energy storage device optimization transmission line of electricity method of operation Download PDFInfo
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- CN108832539A CN108832539A CN201810839629.3A CN201810839629A CN108832539A CN 108832539 A CN108832539 A CN 108832539A CN 201810839629 A CN201810839629 A CN 201810839629A CN 108832539 A CN108832539 A CN 108832539A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
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Abstract
The invention discloses a kind of online de-icing methods using the energy storage device optimization transmission line of electricity method of operation, it includes：Step 1, icing route sending end energy storage device as power supply, icing route receiving end energy storage device as load；Step 2 calculates and protects line current；Step 3 calculates ice melting current：Step 4 calculates power supply capacity vacancy；Step 5, calculated load vacancy；Step 6, grid switching operation put into power supply capacity vacancy using energy storage device as power supply in sending end, while shifting trend by scheduling mode；Load vacancy is put into using energy storage device as load in receiving end；Step 7 starts ice-melt until powerline ice-covering is fallen；Solves the case where needing to consider power supply arrangement and transferable load existing for prior art employing mode ice-melt, due to passing through the limitation of scheduling transfer trend under normal operating mode, the method with limited, the technical problems such as the serious ice damage of large area can not be coped with.
Description
Technical field
The invention belongs to the online de-icing technologies of transmission line of electricity more particularly to a kind of utilization energy storage device to optimize power transmission line road transport
The online de-icing method of line mode.
Background technique
What current power transmission transmission line icing was taken, which melts deicing measure mainly, mechanics deicing and electric energy deicing.Mechanics deicing can only
It solves the problems, such as power grid transmission line road bureau portion's icing, electric grid large area icing cannot be coped with, and the route that needs to stop transport just can be carried out
Mechanics deicing；Electric energy de-icing method mainly includes that ac short circuit ice-melt, excess current de-icing (are changed by the Dispatching adjustment method of operation
Trend is distributed ice-melt, carries out ice-melt using multiple fission conductor of the auto-transformer to special construction using DC current, based on shifting
The ice-melt of phase device on-load, reactive current ice-melt), using DC de-icing device by convert alternating current be direct current electric heating stop transport it is defeated
Electric line ice-melt, high-frequency and high-voltage motivate ice-melt, resistive line ice-melt.In addition, there are also the methods of laser deicings.
Change trend distribution by the Dispatching adjustment method of operation, reaches route and protect line current or more, realize the side of ice-melt
Method is also named mode ice-melt.Such approach application needs to consider the case where power supply arrangement and transferable load, due to normal operation side
By the limitation of scheduling transfer trend under formula, the method with limited, the serious ice damage of large area can not be coped with.
Summary of the invention
The technical problem to be solved in the present invention：There is provided it is a kind of utilize energy storage device optimization the transmission line of electricity method of operation it is online
De-icing method, to solve the case where needing to consider power supply arrangement and transferable load existing for prior art employing mode ice-melt,
Due under normal operating mode by the limitation of scheduling transfer trend, the method with limited, large area can not be coped with
The technical problems such as serious ice damage.
Technical solution of the present invention：
A kind of online de-icing method using the energy storage device optimization transmission line of electricity method of operation, it includes：
Step 1 increases energy storage device in the sending end of icing route and end, and in the sending end of icing route, energy storage device is made
For power supply, in the receiving end of icing route, energy storage device is as load；
Step 2 calculates and protects line current；
Step 3 calculates ice melting current：
Step 4 calculates power supply capacity vacancy；
Step 5, calculated load vacancy；
Step 6, grid switching operation put into power supply capacity vacancy using energy storage device as power supply in sending end, while passing through tune
Degree mode shifts trend；Load vacancy is put into using energy storage device as load in receiving end；
Step 7 starts ice-melt until powerline ice-covering is fallen.
Calculating described in step 2 protects the formula of line current and is：
In formula：IBLine current is protected for route；Σ d is radiation coefficient；V is wind speed (meter per second), and d is diameter of wire (centimetre)；
ROConductor resistance rate (Europe/rice) Δ t when being 0 DEG C is the difference (DEG C) of conductor temperature and outside air temperature.
Described in step 3 calculate ice melting current formula be：
In formula：ROConductor resistance rate (Europe/rice) when being 0 DEG C；TrFor ice-melt time (hour)；Δ t is for conductor temperature and outside
The difference (DEG C) of boundary's temperature；g0The specific gravity of ice；D is diameter of wire (centimetre)；B is ice layer thickness；D is the outer diameter after conductor icing
(centimetre)；RTOFor equivalent ice sheet thermal-conduction resistance (degree centimetre/watt)；RT1For convection current and radiological equivalent thermal resistance (centimetres/watt of degree).
Described in step 4 calculate power supply capacity vacancy method include：
Step 4.1, according to transmission line of electricity electric current ILIt calculates and protects line current IBWith electric current vacancy needed for ice melting current；
Step 4.2, according to electric current vacancy, calculate power supply capacity vacancy needed for protecting line and ice-melt.
Beneficial effect of the present invention：
The present invention uses excess current de-icing；On the basis of changing the distribution of transmission line of electricity trend by scheduling, energy storage is utilized
Device can not only be used for the characteristics of power supply is but also as load, and in the sending end of icing route, energy storage device is as power supply, in icing line
The receiving end on road, energy storage device improve and solve the limitation that transmission line of electricity shifts trend distribution by scheduling mode as load
Condition；As load center looped network does not have the ability of transfer load, such as the existing capacity problem of power supply point selection.
Advantage of the present invention：
(1) it can not only be used for the characteristics of power supply is but also as load using energy storage device, greatly improve transmission line of electricity and pass through tune
Degree mode shifts the restrictive condition of trend distribution.Solve the ability that load center looped network does not have transfer load, power supply point selection
Existing capacity problem etc..
(2) this method improves the restrictive condition that transmission line of electricity shifts trend distribution by scheduling mode, can prevent power transmission line
Road icing in winter achievees the purpose that protect line.
(3) the online de-icing method of party's transmission line of electricity owned by France chooses energy storage device as load and power supply, not using limit
Condition processed, it is easy to operate, easy to control.
(4) this method utilizes existing energy storage device, such as energy storage device, the microgrid battery group of charging station, and eliminating needs
It stops transport transmission line of electricity bring power networks risk, represents the direction of the following line ice-melting, be worthy to be popularized；
Solve the case where needing to consider power supply arrangement and transferable load existing for prior art employing mode ice-melt, by
By the limitation of scheduling transfer trend under normal operating mode, the method with limited, it is tight large area can not to be coped with
The technical problems such as heavy ice calamity.
Specific embodiment
A kind of online de-icing method using the energy storage device optimization transmission line of electricity method of operation, it includes：
Increase energy storage device in the sending end of icing route and end first, in the sending end of icing route, energy storage device conduct
Power supply, in the receiving end of icing route, energy storage device is as load.Then it carries out：
(1) line current is protected, ice melting current calculates
A, it protects line current and refers to that conductor temperature makes conducting wire not minimum current needed for icing above freezing.It is rule of thumb public
Formula calculates as follows：
IBLine current is protected for route；
∑ d radiation coefficient, aluminum conductor usually take 0.11, and copper conductor takes 0.6, and iron conducting wire takes 0.25；
V is wind speed (meter per second)
D is diameter of wire (centimetre)
ROConductor resistance rate (Europe/rice) when being 0 DEG C
Δ t is the difference (DEG C) of conductor temperature and outside air temperature
B, temperature is -5 DEG C, wind speed 5m/s, ice covering thickness 10mm during assuming selected powerline ice-covering, transmission line of electricity
The too conservative calculating of D.C. resistance takes 20 DEG C of value, empirically formula：
1 hour ice melting current I of the model transmission line of electricity is calculated1h
T at this timerIt is 1.
Model transmission line of electricity half an hour ice melting current I is calculated0.5h
T at this timerIt is 0.5.
15 minutes ice melting current I of the model transmission line of electricity are calculated15min。
Wherein:
ROConductor resistance rate (Europe/rice) when being 0 DEG C
TrFor ice-melt time (hour)
Δ t is the difference (DEG C) of conductor temperature and outside air temperature
g0For the specific gravity (generally taking 0.9 by glaze) of ice
D is diameter of wire (centimetre)
B is ice layer thickness, i.e. the every side ice thickness (centimetre) of icing
D is the outer diameter (centimetre) after conductor icing
RTOFor equivalent ice sheet thermal-conduction resistance (degree centimetre/watt)
λ is thermal coefficient (watt/centimetre degree)
To glaze λ=2.27 × 10-2
To freezing fog λ=0.12 × 10-2
RT1For convection current and radiological equivalent thermal resistance (centimetres/watt of degree)
To freezing fog
V is wind speed (meter per second)
(2) power supply capacity vacancy calculates
A. according to transmission line of electricity electric current ILSize calculates and protects line current IB, 1 hour ice melting current I1h, half an hour ice-melt electricity
Flow I0.5h, electric current I needed for 15 minutes ice melting currents15minVacancy.
B. according to transmission line of electricity voltage UL(1) the electric current vacancy calculated calculates and protects line, 1 hour ice-melt, half an hour melts
Power supply capacity vacancy needed for ice, ice-melt in 15 minutes.
PB=UL×(IB-IL)×3/Q (5)
Q is power factor, can equally be obtained
1 hour ice-melt power supply vacancy P1h
P1h=UL×(I1h-IL)×3/Q (6)
0.5 hour ice-melt power supply vacancy P0.5h
P0.5h=UL×(I0.5h-IL)×3/Q (7)
15 minutes ice-melt power supply vacancy P15min
P15min=UL×(I15min-IL)×3/Q (8)
(3) load vacancy calculates.According to transmission line of electricity voltage class UL, size of current IBAnd transferable load ∑ Pkzy,
Calculating load capacity vacancy needed for protecting line, ice-melt in 1 hour, half an hour ice-melt, ice-melt in 15 minutes is respectively PFB, PF1h, PF0.5h,
PF15min.If the original load of icing line end to be melted is PF, ignore transformer impedance loss (because transformer impedance loss is opposite
Line loss is smaller), only consider line loss PL, then：
PFB=UL×IB×3/Q-(PF+∑Pkzy+PLB) (9)
Similarly
PF1h=UL×I1h×3/Q--(PF+∑Pkzy+PL1h) (10)
PF0.5h=UL×I0.5h×3/Q--(PF+∑Pkzy+PL0.5h) (11)
PF15min=UL×I15min×3/Q--(PF+∑Pkzy+PL15min) (12)
Wherein：RL0For the D.C. resistance of route to be melted, w is angular frequency, and L is route to be melted
Reactance, IXTo protect line, ice-melt in 1 hour, half an hour ice-melt, 15 minutes ice melting current virtual values.Such as
(4) grid switching operation puts into power supply capacity vacancy using energy storage device as power supply in sending end, while passing through dispatching party
Formula shifts trend：Reach the power line load for needing ice-melt for transfer load plus itself load capacity；
(5) when there are load vacancy, load vacancy is put into using energy storage device as load in receiving end.
(6) implement ice-melt, until powerline ice-covering is fallen.
Claims (4)
1. a kind of online de-icing method using the energy storage device optimization transmission line of electricity method of operation, it includes：
Step 1 increases energy storage device in the sending end of icing route and end, and in the sending end of icing route, energy storage device is as electricity
Source, in the receiving end of icing route, energy storage device is as load；
Step 2 calculates and protects line current；
Step 3 calculates ice melting current：
Step 4 calculates power supply capacity vacancy；
Step 5, calculated load vacancy；
Step 6, grid switching operation put into power supply capacity vacancy using energy storage device as power supply in sending end, while passing through dispatching party
Formula shifts trend；Load vacancy is put into using energy storage device as load in receiving end；
Step 7 starts ice-melt until powerline ice-covering is fallen.
2. a kind of online de-icing method using the energy storage device optimization transmission line of electricity method of operation according to claim 1,
It is characterized in that：Calculating described in step 2 protects the formula of line current and is：
In formula：IBLine current is protected for route；∑ d is radiation coefficient；V is wind speed (meter per second), and d is diameter of wire (centimetre)；ROIt is 0
DEG C when conductor resistance rate (Europe/rice) Δ t be conductor temperature and outside air temperature difference (DEG C).
3. a kind of online de-icing method using the energy storage device optimization transmission line of electricity method of operation according to claim 1,
It is characterized in that：Described in step 3 calculate ice melting current formula be：
In formula：ROConductor resistance rate (Europe/rice) when being 0 DEG C；TrFor ice-melt time (hour)；Δ t is conductor temperature and extraneous gas
The difference (DEG C) of temperature；g0The specific gravity of ice；D is diameter of wire (centimetre)；B is ice layer thickness；D be conductor icing after outer diameter (li
Rice)；RTOFor equivalent ice sheet thermal-conduction resistance (degree centimetre/watt)；RT1For convection current and radiological equivalent thermal resistance (centimetres/watt of degree).
4. a kind of online de-icing method using the energy storage device optimization transmission line of electricity method of operation according to claim 1,
It is characterized in that：Described in step 4 calculate power supply capacity vacancy method include：
Step 4.1, according to transmission line of electricity electric current ILIt calculates and protects line current IBWith electric current vacancy needed for ice melting current；
Step 4.2, according to electric current vacancy, calculate power supply capacity vacancy needed for protecting line and ice-melt.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111746324A (en) * | 2019-03-29 | 2020-10-09 | 天津平高智能电气有限公司 | Energy storage charging pile |
| CN112054466A (en) * | 2020-08-28 | 2020-12-08 | 山东理工大学 | De-service lithium battery-based ice melting device and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112054466A (en) * | 2020-08-28 | 2020-12-08 | 山东理工大学 | De-service lithium battery-based ice melting device and method |
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