CN107658971B - Portable emergency power supply with direct-current ice melting function - Google Patents
Portable emergency power supply with direct-current ice melting function Download PDFInfo
- Publication number
- CN107658971B CN107658971B CN201610589714.XA CN201610589714A CN107658971B CN 107658971 B CN107658971 B CN 107658971B CN 201610589714 A CN201610589714 A CN 201610589714A CN 107658971 B CN107658971 B CN 107658971B
- Authority
- CN
- China
- Prior art keywords
- ice
- melting
- direct
- current
- ice melting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000002844 melting Methods 0.000 title claims abstract description 164
- 230000008018 melting Effects 0.000 title claims abstract description 125
- 238000000034 method Methods 0.000 claims 1
- 239000000758 substrate Substances 0.000 claims 1
- 230000008014 freezing Effects 0.000 abstract description 6
- 238000007710 freezing Methods 0.000 abstract description 6
- 230000005611 electricity Effects 0.000 abstract description 4
- 238000010248 power generation Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004870 electrical engineering Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000012876 topography 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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/08—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems requiring starting of a prime-mover
-
- 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
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/16—Devices for removing snow or ice from lines or cables
Abstract
The invention discloses a portable emergency power supply with a direct-current deicing function, which comprises a generator, a rectifying part, an emergency power switch and an inversion part which are sequentially connected, wherein the output end of the rectifying part is also connected with a direct-current deicing unit, the direct-current deicing unit comprises a deicing power switch, a deicing wiring device and a deicing short circuit device, one end of the deicing power switch is connected with the output end of the rectifying part, the other end of the deicing power switch is connected with the deicing wiring device, the deicing wiring device is connected with a deicing circuit in a deicing working state, and the deicing short circuit device is connected with the tail end of the deicing circuit. The invention can be used as an emergency power supply for electricity protection at ordinary times, and is used for melting ice of a distribution line when a power distribution network has a rain, snow and freezing disaster, so that the utilization rate and coverage of the device are improved, the safe operation of the power distribution network line is supported forcefully, the configuration rate of ice melting components can be greatly improved, the emergency electricity protection function is exerted, and the safety and the power supply reliability of the power distribution network in the rain, snow and freezing disaster are supported.
Description
Technical Field
The invention relates to the technical field of electrical engineering, in particular to a portable emergency power supply with a direct-current ice melting function.
Background
The large-scale rain, snow and freezing disasters in the south of 2008 bring huge losses to the power grid, and the distribution network lines are widely distributed and are in micro-topography micro-meteorological areas, so that the reverse tower disconnection accidents occur frequently. The research and development of the simple and efficient power distribution network ice melting and power generation device is a key for improving the strength of the distribution network and ensuring reliable power supply. At present, a part of scientific research institutions develop a portable ice melting device based on medium-frequency voltage regulation and rectification, which has a certain effect in rain, snow and freezing disasters, but the device only has a direct-current ice melting function, and is only used in continuous days in low-temperature weather in one year, and even in idle states in continuous years. The problems that the generator battery is aged, the power failure cannot be started, the rectifying module is damaged and the like frequently cause that the ice melting device cannot be used in an idle state, meanwhile, the popularization and the use of the portable ice melting device are seriously affected due to low utilization rate of the ice melting device, the coverage area is small, the ice melting efficiency of the portable ice melting device is not high, only one two-stage rod can be melted at a time, and the reverse rod disconnection of a distribution network line cannot be effectively restrained when severe ice disaster occurs. Portable emergency power supplies are widely used, but they do not have ice melting capabilities and cannot be used for ice melting.
Disclosure of Invention
The invention aims to solve the technical problems: aiming at the problems in the prior art, the portable emergency power supply which can be used as an emergency power supply for electricity protection at ordinary times, is used for melting ice of a distribution line when a power distribution network suffers from rain, snow and freezing disasters, improves the utilization rate and coverage of devices, powerfully supports the safe operation of the distribution network line, can greatly improve the allocation rate of ice melting components, plays an emergency electricity protection function, and simultaneously supports the safety and the power supply reliability of the distribution network in the rain, snow and freezing disasters.
In order to solve the technical problems, the invention adopts the following technical scheme:
the portable emergency power supply with the direct-current deicing function comprises a generator, a rectifying component, an emergency power switch and an inversion component which are sequentially connected, wherein the output end of the rectifying component is also connected with a direct-current deicing unit, the direct-current deicing unit comprises a deicing power switch, a deicing wiring device and a deicing short circuit device, one end of the deicing power switch is connected with the output end of the rectifying component, the other end of the deicing power switch is connected with the deicing wiring device, the deicing wiring device is connected with a deicing circuit in a deicing working state, and the deicing short circuit device is connected with the tail end of the deicing circuit.
Preferably, the ice melting wiring device comprises a first positive electrode joint, a second positive electrode joint and a negative electrode joint, the first positive electrode joint and the second positive electrode joint are connected with the positive electrode output end of the rectifying part together, the negative electrode joint is connected with the negative electrode output end of the rectifying part, ice melting cables are connected to the first positive electrode joint, the second positive electrode joint and the negative electrode joint, and are connected with ice melting wire clamps, each ice melting wire clamp is connected with one-phase conducting wire of an ice melting circuit in an ice melting working state, and the ice melting short circuit device is connected with the tail end of each-phase conducting wire of the ice melting circuit respectively.
Preferably, the ice melting short circuit device comprises a short circuit cable and three short circuit clamps, wherein the three short circuit clamps are connected with the short circuit cable at the same time, each short circuit clamp is connected with one phase of lead of the ice melting circuit in the ice melting working state, and the short circuit cable is grounded.
Preferably, the short-circuit cable is provided with a grounding nail, and the short-circuit cable is grounded through the grounding nail in the ice melting working state.
Preferably, the rectifying component is an uncontrolled twelve-pulse rectifying component.
Preferably, the twelve-pulse-wave-uncontrolled rectifying component comprises two paths of direct-current output terminals, and the output end of the twelve-pulse-wave-uncontrolled rectifying component is connected in series with a series-parallel switching switch for switching the two paths of direct-current output of the two paths of direct-current output terminals into series or parallel output.
Preferably, the series-parallel switch knife gate comprises a series-connection knife gate, a first parallel knife gate and a second parallel knife gate, the two paths of direct current output terminals are composed of a first direct current output terminal and a second direct current output terminal, the positive electrode of the first direct current output terminal is used as the total positive electrode output of the series-parallel switch knife gate, the negative electrode of the second direct current output terminal is used as the total negative electrode output of the series-parallel switch knife gate, the negative electrode of the first direct current output terminal is connected with the total negative electrode through the first parallel knife gate, the positive electrode of the second direct current output terminal is connected with the total positive electrode through the second parallel knife gate, one end of the series-connection knife gate is connected with the negative electrode of the first direct current output terminal, and the other end of the series-connection knife gate is connected with the positive electrode of the second direct current output terminal.
Preferably, the first parallel knife switch and the second parallel knife switch are linked, and the first parallel knife switch and the second parallel knife switch are simultaneously locked with the serial knife switch.
Preferably, the emergency power switch and the ice melting power switch are interlocked.
Preferably, the generator is an intermediate frequency generator.
The portable emergency power supply with the direct-current ice melting function has the following advantages:
1. the invention comprises a generator, a rectifying component, an emergency power switch and an inversion component which are sequentially connected, wherein the output end of the rectifying component is also connected with a direct-current deicing unit, and the direct-current deicing unit has the functions of direct-current deicing and emergency power supply, so that the application range of the device is greatly expanded, the device is used as emergency power protection in normal times, and the device is used for direct-current deicing of a power distribution network line in an ice coating period.
2. The direct-current deicing unit disclosed by the invention can realize direct-current deicing, is wide in application range, has the potential of large-scale popularization, and can greatly improve the capacity of the agriculture distribution network line for resisting large-scale rain, snow and ice disasters after being used in a large area.
3. One end of the ice melting power switch is connected with the output end of the rectifying component, the other end of the ice melting power switch is connected with the ice melting wiring device, the ice melting wiring device is connected with the ice melting circuit in an ice melting working state, and the ice melting short circuit device is connected with the tail end of the ice melting circuit, so that the ice melting power switch has a multipath adjusting function, is wide in power supply and ice melting range, is simple in control system, and is good in ice melting voltage direct current performance.
4. The invention comprises a generator, a rectifying part, an emergency power switch and an inversion part which are sequentially connected, and adopts a power supply mode of rectifying and inverting after power generation, thereby greatly reducing the size and weight of the generator, being capable of being carried by two people manually, and having strong emergency power supply and ice melting maneuverability.
5. The direct-current deicing unit comprises a deicing power switch, a deicing wiring device and a deicing short circuit device, wherein one end of the deicing power switch is connected with the output end of the rectifying component, the other end of the deicing power switch is connected with the deicing wiring device, the deicing wiring device is connected with a deicing circuit in a deicing working state, the deicing short circuit device is connected with the tail end of the deicing circuit, and the wire clamp is used for deicing access and three-phase short circuit.
Drawings
Fig. 1 is a schematic overall structure of an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an ice melting connection device according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of an ice-melting shorting device in an embodiment of the invention.
Fig. 4 is a schematic structural diagram of a serial-parallel switching knife switch in an embodiment of the invention.
Legend description: 1. a generator; 2. a rectifying member; 21. a series-parallel switching knife switch; 211. a knife switch is connected in series; 212. a first parallel knife switch; 213. the second parallel knife switch; 3. an emergency power switch; 4. an inverter component; 5. a direct current ice melting unit; 51. an ice-melting power switch; 52. an ice melting wiring device; 521. a first positive electrode tab; 522. a second positive electrode tab; 523. a negative electrode joint; 524. an ice melting cable; 525. an ice melting wire clamp; 53. ice melting short circuit device; 531. a short-circuited cable; 532. short jointing clamp.
Detailed Description
As shown in fig. 1, the portable emergency power supply with the direct-current ice melting function in this embodiment includes a generator 1, a rectifying component 2, an emergency power switch 3 and an inverter component 4 which are sequentially connected, the output end of the rectifying component 2 is further connected with a direct-current ice melting unit 5, the direct-current ice melting unit 5 includes an ice melting power switch 51, an ice melting wiring device 52 and an ice melting short circuit device 53, one end of the ice melting power switch 51 is connected with the output end of the rectifying component 2, the other end is connected with the ice melting wiring device 52, the ice melting wiring device 52 is connected with an ice melting circuit in an ice melting working state, and the ice melting short circuit device 53 is connected with the tail end of the ice melting circuit. The output alternating-current voltage source of the generator 1 is rectified through the rectifying component 2 to obtain a direct-current voltage source, and if the emergency power switch 3 is opened, the direct-current voltage source is sent to the inverting component 4 for inversion and can be used as an emergency power supply; if the ice-melting power switch 51 is turned on in the ice-melting working state, the direct-current voltage source is sent into the ice-melting line through the ice-melting wiring device 52, and meanwhile, the ice-melting shorting device 53 is used for shorting the tail end of the ice-melting line to the ground, so that the direct-current ice-melting function of the ice-melting line is realized. According to the embodiment, the generator 1 is used as a power supply, the rectifying part 2 is used for rectifying, then the direct-current voltage rectified by the rectifying part 2 is subjected to inversion through the inversion part 4 to obtain the power frequency voltage, the size and the weight of an emergency power supply are reduced under the condition that the power is ensured to be constant, and meanwhile, the direct-current voltage is directly taken from the middle of the output end of the rectifying part 2 and used for melting ice, so that the device has strong use maneuverability.
In this embodiment, the emergency power switch 3 and the ice melting power switch 51 are interlocked, so that the portable emergency power source having the direct-current ice melting function of this embodiment can be switched between the direct-current ice melting function and the emergency power source function.
In the embodiment, the generator 1 is an intermediate frequency generator, the intermediate frequency generator is used as a power supply for direct-current deicing and emergency power supply, the device adopts intermediate frequency power generation, and the size and the weight of the generator are greatly reduced under the condition that the power and the voltage are ensured to be certain. In the embodiment, the intermediate frequency generator specifically adopts a commercial TFDJ-12 light generator, the size is 0.7mX0.7mX0.6m, the weight is 80kg, the power generation power is 12kW, the power generation frequency is 400Hz, the output voltage range is 12V-24V, and the self-powered current display function is realized.
In this embodiment, the rectifying component 2 is an uncontrolled twelve-pulse rectifying component, and the control system of the uncontrolled twelve-pulse rectifying component is simple, convenient to radiate, good in rectifying effect, and convenient for a low-voltage system to use, and can output high-quality direct-current voltage through the uncontrolled twelve-pulse rectifying component to meet the requirements of emergency power supply and direct-current ice melting. In this embodiment, the uncontrolled twelve-pulse rectifier unit specifically adopts an XDJS-20 type twelve-pulse rectifier, and has a rated current of 500A and a rated voltage of 30V. In addition, the emergency power switch 3 and the ice-melting power switch 51 are wired using cables. The inverter component 4 is used for inverting the direct current voltage, and can output the direct current voltage of 220V and 50Hz by adjusting the output voltage of the generator 1, so that the inverter component 4 is used for emergency power supply under the conditions of power failure or field construction and the like, and in the embodiment, the inverter component 4 adopts a commercially available FLUKENB-9 type inverter, has 9kW of inverter power and has a self-charging display function, and can basically meet the power supply requirements of all small emergency occasions.
As shown in fig. 2, the ice-melting wiring device 52 includes a first positive electrode joint 521, a second positive electrode joint 522 and a negative electrode joint 523, where the first positive electrode joint 521 and the second positive electrode joint 522 are connected together with the positive electrode output end of the rectifying component 2, the negative electrode joint 523 is connected with the negative electrode output end of the rectifying component 2, the first positive electrode joint 521, the second positive electrode joint 522 and the negative electrode joint 523 are connected with an ice-melting cable 524, and the ice-melting cable 524 is connected with an ice-melting wire clamp 525, each ice-melting wire clamp 525 is connected with a phase conductor of an ice-melting circuit in an ice-melting working state, and the ice-melting shorting device 53 is connected with the end of each phase conductor of the ice-melting circuit. Through the structure, the direct-current output voltage source of the rectifying part 2 can be output to the ice melting circuit, and the ice melting circuit has the advantages of being simple in operation, quick in assembly and disassembly and stable and reliable in contact. In the embodiment, the first positive electrode joint 521, the second positive electrode joint 522 and the negative electrode joint 523 of the ice melting wiring device 52 are connected with the ice melting cable 524, and the ice melting cable 524 is connected with the ice melting wire clamp 525, so that two-phase wires can be simultaneously melted and one-phase wire can be melted, the second positive electrode joint 522 and the negative electrode joint 523 are connected with the two-phase wires, two-phase serial ice melting is realized, and the two-phase wires are simultaneously melted; the first positive electrode joint 521, the second positive electrode joint 522 and the negative electrode joint 523 are respectively connected with the three-phase wires simultaneously, so that two-to-one series deicing is realized, and only the series wires are subjected to deicing. In this embodiment, the ice melting connection device 52 has a shunt for measuring the ice melting current, and the current capacity is 500A; the ice melting cables 524 are JV-120 cables, each 30m long; each ice melting wire clamp 525 is 3m long, and each phase adopts two butt joints, so that the ice melting wiring requirements of all distribution network lines can be met.
As shown in fig. 3, the ice-melting shorting device 53 includes a shorting cable 531 and three shorting clips 532, where the three shorting clips 532 are simultaneously connected to the shorting cable 531, and each shorting clip 532 is connected to a phase of a wire of the ice-melting line in the ice-melting operation state, and the shorting cable 531 is grounded. The three-phase short circuit of the ice-melting wire can be realized during ice melting, the wiring is convenient, the ice-melting efficiency is high, meanwhile, the terminal adopts the short circuit grounding mode, and the danger of reverse power transmission during ice melting of the agriculture network distribution line is effectively avoided. In the embodiment, the short-circuit cable 531 is provided with the grounding nail, and the short-circuit cable 531 is grounded through the grounding nail in the ice melting working state, so that the grounding is convenient and quick, the grounding is stable and reliable, and the danger of reverse power transmission during ice melting of the agriculture distribution network line is further reduced. The short-circuit cables 531 are JV-120 cables, each 30m long; each short binding clip 532 is 3m long, and each phase adopts two butt joints, so that the ice melting wiring requirements of all distribution network lines can be met.
As shown in fig. 4, the twelve-pulse wave rectifier unit includes two dc output terminals, the output end of the twelve-pulse wave rectifier unit is connected in series with a series-parallel switch 21 for switching the two dc outputs of the two dc output terminals to series or parallel output, and the two dc outputs of the two dc output terminals are switched to series or parallel output by the series-parallel switch 21, so that the selection of high voltage and large current can be realized, and the ice melting requirements of different lines and different power requirements during power supply can be satisfied. When in emergency power supply, the emergency power switch 3 and the ice melting power switch 51 are turned off, the voltage of the generator 1 and the serial-parallel switch 21 are regulated to enable the direct current output to reach the rated voltage of the inversion component 4, the generator 1 is turned off, the emergency power switch 3 is turned on, the ice melting power switch 51 is continuously in the on-off state, and the emergency power supply function can be realized by turning on the generator 1; when in direct-current deicing, the deicing wiring and the three-phase short circuit grounding are carried out according to the deicing scheme, the positions of the series-parallel disconnecting link 21 are adjusted, the voltage of the intermediate-frequency generator is firstly adjusted to the lowest position, the deicing power switch 51 is closed, the emergency power switch 3 is disconnected, the generator 1 is started, the voltage is adjusted to the corresponding deicing current, the direct-current deicing is implemented, and after the direct-current deicing is completed, the phase-change deicing is carried out through the deicing wiring device 52 until the three-phase deicing is completely finished.
When the lowest voltage output is that the series-parallel knife switches 21 are connected in parallel during ice melting, and when the highest voltage output is that the series-parallel knife switches 21 are connected in series, the output voltage is calculated as shown in (1);
U dc ＝1.25kU ac (1)
in the formula (1), U dc Output voltage when DC ice melting is carried out, U ac For the output voltage of the generator 1 (the output range is 12V-24V in the embodiment), k is the coefficient (the value is between 0 and 1) when connected in series, so the DC output voltage range is calculated to be 15V-60V, and according to the route parameters of the distribution network lines of each middle farm, the DC ice melting range and the minimum ice melting distance l can be calculated min The expression of the calculation function of (2) is shown as the formula (2), and the maximum ice melting distance l max The expression of the calculation function of (2) is shown in the formula (3);
l min ＝U min /(2I max R 0 ) (2)
l max ＝U max /(1.5I min R 0 ) (3)
in the formula (2) and the formula (3), l min To minimum ice melting distance, U min 15V, U as minimum output DC voltage max For maximum output DC voltage 60V, I max For the maximum ice melting current corresponding to a certain linear wire, I min For the minimum ice melting current corresponding to a certain linear wire, R 0 For the resistance per unit length of the linear wire, constants 2 and 1.5 in the denominator represent the resistivity when two phases are connected in series and two are connected in parallel, respectively. The ice melting distance range can be calculated according to the formula and the wire parameters and is shown in table 1.
Table 1: of different wire linearities ice melting distance range table.
| Wire type | Maximum ice melting distance (m) | Minimum ice melting distance (m) |
| LGJ×35 | 273 | 34 |
| LGJ×50 | 311 | 38 |
| LGJ×70 | 347 | 45 |
| LGJ×95 | 384 | 50 |
| LGJ×120 | 406 | 49 |
| LGJ×150 | 430 | 48 |
As shown in fig. 4, the series-parallel switch 21 includes a series switch 211, a first parallel switch 212 and a second parallel switch 213, where two dc output terminals are composed of a first dc output terminal and a second dc output terminal, the positive electrode of the first dc output terminal is used as the total positive electrode output of the series-parallel switch 21, the negative electrode of the second dc output terminal is used as the total negative electrode output of the series-parallel switch 21, the negative electrode of the first dc output terminal is connected with the total negative electrode through the first parallel switch 212, the positive electrode of the second dc output terminal is connected with the total positive electrode through the second parallel switch 213, one end of the series switch 211 is connected with the negative electrode of the first dc output terminal, and the other end is connected with the positive electrode of the second dc output terminal. The twelve-pulse-wave-uncontrolled rectifying component comprises two paths of direct-current output terminals which are converged through the series-parallel switching knife switch 21, when the series-connection knife switch 211 is closed, the first parallel knife switch 212 is opened, and the second parallel knife switch 213 is opened, the two paths of output of the twelve-pulse-wave-uncontrolled rectifying component are connected in series, the voltage is highest, and when the series-connection knife switch 211 is opened, the first parallel knife switch 212 is closed, and the second parallel knife switch 213 is closed, the two paths of output of the twelve-pulse-wave-uncontrolled rectifying component are connected in parallel, and the current is highest. In this embodiment, the first parallel knife 212 and the second parallel knife 213 are linked, and both the first parallel knife 212 and the second parallel knife 213 are simultaneously locked with the serial knife 211, so as to ensure that the serial-parallel switching of the serial-parallel switching knife 21 is simple and reliable.
In summary, the portable emergency power supply with the direct-current deicing function in this embodiment generates power through the generator 1, the rectifying component 1 rectifies the direct-current voltage, the direct-current voltage can be used for deicing, the inversion component 4 inverts the direct-current voltage, and the output power frequency voltage is used for emergency power supply.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the present invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.
Claims (4)
1. A portable emergency power source with direct current ice melting function is characterized in that: the ice-melting device comprises a generator (1), a rectifying component (2), an emergency power switch (3) and an inversion component (4) which are sequentially connected, wherein the output end of the rectifying component (2) is also connected with a direct-current ice-melting unit (5), the direct-current ice-melting unit (5) comprises an ice-melting power switch (51), an ice-melting wiring device (52) and an ice-melting short-circuit device (53), one end of the ice-melting power switch (51) is connected with the output end of the rectifying component (2), the other end of the ice-melting power switch is connected with the ice-melting wiring device (52), the ice-melting wiring device (52) is connected with an ice-melting circuit in an ice-melting working state, and the ice-melting short-circuit device (53) is connected with the tail end of the ice-melting circuit;
the ice melting wiring device (52) comprises a first positive electrode joint (521), a second positive electrode joint (522) and a negative electrode joint (523), wherein the first positive electrode joint (521) and the second positive electrode joint (522) are connected with the positive electrode output end of the rectifying component (2) together, the negative electrode joint (523) is connected with the negative electrode output end of the rectifying component (2), ice melting cables (524) are connected to the first positive electrode joint (521), the second positive electrode joint (522) and the negative electrode joint (523), and ice melting wire clamps (525) are connected to the ice melting cables (524), each ice melting wire clamp (525) is connected with one phase of wire of an ice melting circuit in an ice melting working state, and the ice melting shorting device (53) is connected with the tail ends of each phase of wires of the ice melting circuit respectively;
the ice melting short circuit device (53) comprises a short circuit cable (531) and three short circuit clamps (532), wherein the three short circuit clamps (532) are connected with the short circuit cable (531) at the same time, each short circuit clamp (532) is connected with one phase of conducting wire of an ice melting circuit in an ice melting working state, and the short circuit cable (531) is grounded;
the rectification component (2) is an uncontrolled twelve-pulse rectification component, the uncontrolled twelve-pulse rectification component comprises two direct-current output terminals, the output end of the uncontrolled twelve-pulse rectification component is connected in series with a series-parallel switch knife (21) for switching the two direct-current outputs of the two direct-current output terminals into series or parallel output, the series-parallel switch knife (21) comprises a series switch (211), a first parallel switch (212) and a second parallel switch (213), the two direct-current output terminals consist of a first direct-current output terminal and a second direct-current output terminal, the positive electrode of the first direct-current output terminal is used as the total positive electrode output of the series-parallel switch knife (21), the negative electrode of the second direct-current output terminal is used as the total negative electrode output of the series-parallel switch knife (21), the negative electrode of the first direct-current output terminal is connected with the total negative electrode through the first parallel switch (212), the positive electrode of the second direct-current output terminal is connected with the total positive electrode of the second parallel switch (213), and the positive electrode of the second direct-current output terminal is connected with the first parallel switch (213) and the second direct-current output terminal (213) in parallel;
when the lowest voltage output is that the series-parallel knife switches (21) are connected in parallel during ice melting, and when the highest voltage output is that the series-parallel knife switches (21) are connected in series, the output voltage is calculated as shown in a formula (1);
U dc =1.25kU ac （1）
in the formula (1), the components are as follows,U dc the voltage is output when the direct current is melted,U ac for outputting a voltage to the generator (1),kthe series time coefficient is between 0 and 1, so as to calculate the direct current output voltage range of the portable emergency power supply, including the minimum output direct current voltageU min And maximum output DC voltageU max The method comprises the steps of carrying out a first treatment on the surface of the Calculating minimum ice melting distance of portable emergency power supplyl min And maximum ice melting distancel max Minimum ice melting distance of portable emergency power supplyl min The expression of the calculation function of (2) is shown as the expression of the maximum ice melting distancel max The expression of the calculation function of (2) is shown in the formula (3);
l min = U min /(2I max R 0 ) （2）
l max = U max /(1.5I min R 0 ) （3）
in the formulas (2) and (3),l min for a minimum distance of ice melting,U min for a minimum output dc voltage,U max for maximum output the direct-current voltage is applied to the substrate,I max for the maximum ice melting current corresponding to a certain linear wire,I min for the minimum ice melting current corresponding to a certain linear wire,R 0 for the resistance per unit length of the linear wire, constants 2 and 1.5 in the denominator represent the resistivity when two phases are connected in series and two are connected in parallel, respectively.
2. The portable emergency power supply with direct current ice melting function according to claim 1, wherein: the short-circuit cable (531) is provided with a grounding nail, and the short-circuit cable (531) is grounded through the grounding nail in the ice melting working state.
3. The portable emergency power supply with direct current ice melting function according to claim 1, wherein: the emergency power switch (3) and the ice melting power switch (51) are interlocked.
4. The portable emergency power supply with direct current ice melting function according to claim 1, wherein: the generator (1) is an intermediate frequency generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610589714.XA CN107658971B (en) | 2016-07-25 | 2016-07-25 | Portable emergency power supply with direct-current ice melting function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610589714.XA CN107658971B (en) | 2016-07-25 | 2016-07-25 | Portable emergency power supply with direct-current ice melting function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107658971A CN107658971A (en) | 2018-02-02 |
| CN107658971B true CN107658971B (en) | 2024-04-16 |
Family
ID=61126546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610589714.XA Active CN107658971B (en) | 2016-07-25 | 2016-07-25 | Portable emergency power supply with direct-current ice melting function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107658971B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111746324A (en) * | 2019-03-29 | 2020-10-09 | 天津平高智能电气有限公司 | Energy storage charging pile |
| CN110456198B (en) * | 2019-08-14 | 2021-09-28 | 国网湖南省电力有限公司 | Soft power-on method in chain type SVG two-in-one-string test mode |
| CN113949153B (en) * | 2021-11-22 | 2022-09-16 | 贵州电网有限责任公司 | Portable emergency power supply with ice melting function |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4082962A (en) * | 1977-07-11 | 1978-04-04 | Burgsdorf Vladimir Vladimirovi | Device for melting the icing by direct current on conductors of overhead power transmission line |
| CN102290773A (en) * | 2011-08-25 | 2011-12-21 | 中国电力工程顾问集团西南电力设计院 | Wiring method for realizing full-automatic line direct-current ice-melting operation |
| CN102331532A (en) * | 2011-05-19 | 2012-01-25 | 南方电网科学研究院有限责任公司 | Equivalent test method for direct current thawing device |
| CN202368450U (en) * | 2011-11-30 | 2012-08-08 | 龙岩市海德馨汽车有限公司 | Circuit de-icing generator vehicle |
| CN103368122A (en) * | 2013-06-21 | 2013-10-23 | 国家电网公司 | Ground wire direct current-based deicing automatic wiring system |
| CN203747494U (en) * | 2014-03-14 | 2014-07-30 | 株洲南车时代电气股份有限公司 | Emergency power supply device |
| CN104638656A (en) * | 2013-11-13 | 2015-05-20 | 国家电网公司 | SVC (static Var compensation) system with function of twelve pulses based fixed ice melting |
| CN205882846U (en) * | 2016-07-25 | 2017-01-11 | 国网湖南省电力公司 | Have portable emergency power source of direct current ice -melt function concurrently |
-
2016
- 2016-07-25 CN CN201610589714.XA patent/CN107658971B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4082962A (en) * | 1977-07-11 | 1978-04-04 | Burgsdorf Vladimir Vladimirovi | Device for melting the icing by direct current on conductors of overhead power transmission line |
| CN102331532A (en) * | 2011-05-19 | 2012-01-25 | 南方电网科学研究院有限责任公司 | Equivalent test method for direct current thawing device |
| CN102290773A (en) * | 2011-08-25 | 2011-12-21 | 中国电力工程顾问集团西南电力设计院 | Wiring method for realizing full-automatic line direct-current ice-melting operation |
| CN202368450U (en) * | 2011-11-30 | 2012-08-08 | 龙岩市海德馨汽车有限公司 | Circuit de-icing generator vehicle |
| CN103368122A (en) * | 2013-06-21 | 2013-10-23 | 国家电网公司 | Ground wire direct current-based deicing automatic wiring system |
| CN104638656A (en) * | 2013-11-13 | 2015-05-20 | 国家电网公司 | SVC (static Var compensation) system with function of twelve pulses based fixed ice melting |
| CN203747494U (en) * | 2014-03-14 | 2014-07-30 | 株洲南车时代电气股份有限公司 | Emergency power supply device |
| CN205882846U (en) * | 2016-07-25 | 2017-01-11 | 国网湖南省电力公司 | Have portable emergency power source of direct current ice -melt function concurrently |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107658971A (en) | 2018-02-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205882846U (en) | Have portable emergency power source of direct current ice -melt function concurrently | |
| CN107658971B (en) | Portable emergency power supply with direct-current ice melting function | |
| CN101242087A (en) | Ice fusion method for power transmission line | |
| CN102623941B (en) | Direct current deicing device for 10KV rural power grid distribution line | |
| WO2021136286A1 (en) | System and method for melting ice on overhead line by using photovoltaic power generation | |
| CN108899853B (en) | Live-line ice melting topological system and ice melting method thereof | |
| CN215835111U (en) | Direct-current ice melting system applied to overhead ground wire and direct-current ice melting equipment thereof | |
| CN101540508A (en) | Reconfigurable device of static var compensation (SVC) and direct-current thawing | |
| CN106208342B (en) | A kind of power supply unit of tracking system, inverter and method of supplying power to | |
| CN107516846B (en) | Ice melting method for agricultural distribution network | |
| CN112102984A (en) | Novel steel core ice melting insulated wire and ice melting system and method thereof | |
| CN202749783U (en) | Direct current ice melting and static var compensation device | |
| CN102299499A (en) | Ice melting scheme of circuit alternating-current short circuit after voltage reduction for 10kV power supply through 35kV main transformer | |
| CN101436768A (en) | Power line DC ice-melting device | |
| CN211183415U (en) | DC line reformed by same-tower double-circuit AC line | |
| CN112234567A (en) | Novel uncontrolled direct current ice melting device and ice melting method thereof | |
| CN113161967A (en) | Phase-shifting online ice melting method based on flexible interconnected transformer substation | |
| CN214429212U (en) | Short-distance direct-current ice melting device | |
| CN201234103Y (en) | Transmission line DC ice melting device capable of combined use | |
| CN204905819U (en) | Electric power electric wire ice -melt circuit based on STATCOM | |
| CN201590489U (en) | Tubular bus T-joint hardware fitting for 500kV power transformation direct-current thawing | |
| CN110797870A (en) | Single-phase power-to-three-phase power supply system based on three-phase YNd transformer | |
| CN206179762U (en) | Outdoor SF6 circuit breaker heating device | |
| CN206117088U (en) | Alternating current transmission line conductor ice prevention and static reactive compensation device | |
| CN210927098U (en) | System for converting single-phase power into three-phase power based on dual-power converter and three-phase transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |