CN207134727U - Based on the Portable rural distribution AC ice melting device for handing over orthogonal Two Stages - Google Patents
Based on the Portable rural distribution AC ice melting device for handing over orthogonal Two Stages Download PDFInfo
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- CN207134727U CN207134727U CN201721206988.2U CN201721206988U CN207134727U CN 207134727 U CN207134727 U CN 207134727U CN 201721206988 U CN201721206988 U CN 201721206988U CN 207134727 U CN207134727 U CN 207134727U
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Abstract
The utility model discloses a kind of based on the Portable rural distribution AC ice melting device for handing over orthogonal Two Stages, including intermediate frequency generator, AC/DC rectifiers, DC/AC inverters and output connection unit, the intermediate frequency generator is sequentially connected in series with AC/DC rectifiers, DC/AC inverters, output connection unit, and the output end for exporting connection unit is connected with the target agriculture distribution line for treating ice-melt.The volume weight of generator and deicing device can be greatly reduced in the utility model under equal ice-melt power, can the anti-influence of weakened line road feel so as to reducing device total capacity demand, it is not required to disconnect along line transformer when the ice-melt simultaneously of energy three-phase and ice-melt, ice-melt efficiency high, device volume is small, in light weight, be readily transported to traffic inexpediently area implement agriculture distribution line ice-melt, line security operation level can be effectively improved.
Description
Technical field
It the utility model is related to the transmission line de-icing technology of electrical engineering field, and in particular to one kind is based on AC-DC-AC
The Portable rural distribution AC ice melting device of Two Stages.
Background technology
Southern region of China freezing rain and snow disaster is taken place frequently, and serious influence is caused to operation of power networks.Agriculture distribution line by
In multi-point and wide-ranging, and it is distributed in the obvious mountain area of mima type microrelief microclimate, winter icing situation especially severe, to agriculture distribution safety more
Reliable power supply causes serious threat.Electric current de-icing technology is the maximally efficient means of current reply Ice Disaster in Power Grids, but existing
Ice-melt research mainly in major network, and agriculture distribution line typically hangs with more transformers along the line because branch line is more, existing
Major network de-icing method cannot be used directly for agriculture distribution line ice-melt.
Part R＆D institution, which develops, to be depressured ice-melt using AC power in station, formula direct current is moved using vehicle power
The ice-melting modes such as ice-melt.When being depressured ice-melt using AC power in station, a set of ice-melt dedicated transformer need to be set up in station, typically
Main line progress ice-melt can only be directed to and cost of investment is higher, it is difficult to promoted；When carrying out DC ice melting using mobile vehicle-mounted power supply
Power distribution network transformer along need to pulling open in advance, preparation amount is big before ice-melt, and ice-melt efficiency is low, and ice-melt supply vehicle volume compared with
Greatly, it is difficult to transport to the agriculture distribution ice-melt scene of mountain height, great distance.
To agriculture distribution line, typically using with strong points, convenient transport special deicing device.Such as patent CN
102684128 A disclose a kind of Portable super-short and disclose one apart from agriculture distribution DC de-icing device, the U of CN 202633875
The kind adjustable agriculture distribution DC de-icing device of output voltage, it is straight that the B of CN 102623941 disclose a kind of 10kV rural power grid distribution lines
Flow deicing device, these devices be all by convert alternating current be direct current after implement DC ice melting.Due to agriculture distribution transmission line of electricity
Branch is more and hangs with multiple distribution transformers along the line, and circuit DC current during to prevent DC ice melting flows through distribution transformer band
The problems such as carrying out transformer bias, need first to disconnect before DC ice melting it is each implement ice-melt again along line transformer, recover to connect again after ice-melt
Connect.When therefore implementing agriculture distribution ice-melt using DC de-icing device, whole deicing processes operational ton is big, it is quickly real to be unfavorable for ice-melt
Apply.
According to exchange ice-melt, foregoing problems just can be effectively overcome.But because agriculture distribution transmission line of electricity leads to during ice-melt
Normal non-transformer supply, it can only typically use and carry generator powered, how determine that generation frequency and ice-melt frequency are a problems.This
Be because：The volume weight of generator and its output frequency are closely related, in the more low then volume of identical output power lower frequency more
Greatly, power-frequency generation is difficult to the requirement for meeting portable carrying；At the same time, because induction reactance is directly proportional to frequency, according to intermediate frequency
Generator directly exports ice-melt voltage, and transmission line of electricity can be much larger than its power frequency induction reactance in induction reactance corresponding to intermediate frequency and typically be several times as much as
Its line resistance could meet line ice-melting demand, it is necessary to which generator exports very high voltage and capacity, and this causes generator again
Volume and weight is larger and not readily portable.Therefore, there is an urgent need to study a kind of efficient Portable rural distribution exchange ice-melt side
Method.
Utility model content
The technical problems to be solved in the utility model is：A kind of Portable rural based on AC-DC-AC Two Stages is provided to match somebody with somebody
Net AC ice melting device, the volume weight of generator and deicing device, Neng Gouxiao can be greatly reduced under equal ice-melt power
The anti-influence of line of weakness road feel is not required to transformation along disconnection so as to reduce device total capacity demand when three-phase ice-melt simultaneously and ice-melt
Device, device volume is small, in light weight, be readily transported to traffic inexpediently area implement agriculture distribution line ice-melt, can effectively improve
Line security operation level.
In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model is：
A kind of Portable rural distribution AC ice melting device based on AC-DC-AC Two Stages, including intermediate frequency generator, AC/
DC rectifiers, DC/AC inverters and output connection unit, it is the intermediate frequency generator and AC/DC rectifiers, DC/AC inverters, defeated
Go out connection unit to be sequentially connected in series, the output end for exporting connection unit is connected with the target agriculture distribution line for treating ice-melt.
Preferably, the AC/DC rectifiers include three-phase uncontrollable rectifier bridge and DC capacitor, the three-phase uncontrollable rectifier bridge
It is made up of six diodes.
Preferably, the three phase inverter bridge that the DC/AC inverters are made up of full-controlled switch devices such as IGBT is formed, and is examined
Consider the intrinsic larger inductance of DC ice-melting itself, three phase inverter bridge output end does not configure filtering unit.
Portable rural distribution AC ice melting device tool of the utility model based on AC-DC-AC Two Stages has the advantage that：
1）Portable rural distribution exchange de-icing method of the utility model based on AC-DC-AC Two Stages can be disposably right
Three-phase line ice-melt simultaneously, avoids the problem of DC ice melting at least needs ice-melt twice to complete three-phase line ice-melt, together
No longer need to disconnect during Shi Rongbing treat DC ice-melting along line transformer, reduce ice-melt operation element amount, improve ice-melt effect
Rate.
2）The ice-melt output of Portable rural distribution exchange de-icing method of the utility model based on AC-DC-AC Two Stages
Frequency is relatively low, can the significantly anti-influence of weakened line road feel, so as to reduce the output port voltage of deicing device and complete machine capacity.
3）The generator frequency of Portable rural distribution exchange de-icing method of the utility model based on AC-DC-AC Two Stages
Rate and ice-melt frequency isolation, under identical ice melting capability, can be greatly decreased the volume and weight of deicing device, be easy to manually take
Band implements the ice-melt of agriculture distribution line to the area having inconvenient traffic.
In summary, Portable rural distribution AC ice melting device of the utility model based on AC-DC-AC Two Stages utilizes
Intermediate frequency generator substitution industrial frequency generator provides electric energy, and generator and deicing device can be greatly reduced under equal output power
Volume weight；The output low frequency three-phase alternating current after ac-dc-ac transform, can be to three-phase line ice-melt simultaneously, it is thus also avoided that direct current
The problem of need to disconnecting along line transformer during ice-melt, and the anti-influence of weakened line road feel needs so as to reduce device output voltage and capacity
Ask.It is the utility model corresponding intrument small volume, in light weight, it is easy to artificial carry to the area having inconvenient traffic to implement agriculture distribution line
Ice-melt, to improve line security operation level.
Brief description of the drawings
Fig. 1 is the theory structure schematic diagram of the utility model embodiment.
Fig. 2 is the concrete structure schematic diagram of the utility model embodiment.
Fig. 3 is the modeling and simulating result figure of the utility model embodiment.
Embodiment
As shown in figure 1, the reality of Portable rural distribution exchange de-icing method of the present embodiment based on AC-DC-AC Two Stages
Applying step includes：
1）Three-phase alternating current is exported by intermediate frequency generator, the amplitude and frequency of its output voltage are depending on generator ginseng
Number, and keep constant in the process of running, its output frequency can be chosen to be 400Hz；
2）Through diode rectifier, the three-phase alternating current exported that intermediate frequency generator is generated electricity is transformed to direct current, and it is exported
The amplitude of DC voltage depends primarily on generator output voltage, must not influenceed by ice-melt loading condition substantially；
3）The three-phase full-bridge inverter formed again through IGBT, the DC power conversion that AC/DC rectifiers are exported are 20Hz's
Three-phase alternating current；
4）The low frequency three-phase alternating current that DC/AC inverters export will be transported to the mesh for treating ice-melt through output connection unit
Mark on agriculture distribution line.
As shown in figure 1, Portable rural distribution AC ice melting device of the present embodiment based on AC-DC-AC Two Stages, including
Intermediate frequency generator 1, AC/DC rectifiers 2, DC/AC inverters 3 and output connection unit 4.The ac output end of intermediate frequency generator 1
It is connected to the ac input end of AC/DC rectifiers 2；The direct current of the DC output end of AC/DC rectifiers 2 and DC/AC inverters 3 is defeated
Enter to hold connected, the ac output end via output connections unit 4 of DC/AC inverters 3 with treating that the target agriculture distribution line of ice-melt is connected.
The program provides electric energy using intermediate frequency generator, and the volume of generator and deicing device can be greatly reduced under equal power supply capacity
With weight, meet portability requirements；Three-phase alternating current is exported after ac-dc-ac transform, to three-phase line ice-melt simultaneously and can be kept away
The problem of need to being disconnected along line transformer when having exempted from DC ice melting；Because its output frequency is relatively low, can weakened line road feel it is anti-influence from
And the output voltage and capacity requirement of device are reduced, ice-melt is corresponded under same apparatus capacity apart from longer, or in identical ice-melt
It is smaller apart from lower corresponding installed capacity.
As shown in Fig. 2 intermediate frequency generator 1 is three-phase gasoline engine generator, and it is light and handy portable, specifically use AXQ1-350
Type three-phase gasoline engine generator, machine rated frequency 400Hz, rated output power 12kW, rated line voltage 23V.
As shown in Fig. 2 AC/DC rectifiers 2 include three-phase uncontrollable rectifier bridge and DC capacitor, three-phase uncontrollable rectifier bridge is by six
Individual diode is formed, and forms each diodes nominal voltage 50V, the rated current 300A of three-phase uncontrollable rectifier bridge；DC capacitor
Composed in parallel using 20 4700uF/63V electric capacity；Rated direct voltage 30V, the rated power 15kW of AC/DC rectifiers.
As shown in Fig. 2 DC/AC inverters 3 are made up of 6 IGBT three phase inverter bridges formed.In view for the treatment of DC ice-melting
Inherent filtration inductance, so the output end of three phase inverter bridge no longer additionally configures filtering unit.Inverter bridge is modulated using SVPWM,
Switching frequency selects 800Hz, fundamental frequency 20Hz, and modulation ratio can be adjusted according to length, the line style of DC ice-melting between 0-1
Section so that actual output voltage electric current meets the ice-melt demand for treating ice-melt agriculture distribution line.
Using the structure and parameter of foregoing embodiment, model and emulated in Matlab/Simulink, emulation knot
Fruit is as shown in Figure 3.It can be seen from Fig. 3, in the case where generator exports 400Hz voltages, device can export it is 3 symmetrical,
The ice melting current that frequency is 20Hz, virtual value is 353A, meet the conventional transmission of electricity line style LGJ-70 of agriculture distribution ice-melt demand；Together
Reason, regulates and controls ice-melt voltage x current size by adjusting the SVPWM modulation ratios of DC/AC inverters 3, can meet LGJ-35, LGJ-
Other agriculture distributions of 50 grades are often with the ice-melt requirement of line style.
Described above is only preferred embodiment of the present utility model, and the scope of protection of the utility model is not limited merely to
Above-described embodiment, all technical schemes belonged under the utility model thinking belong to the scope of protection of the utility model.It should refer to
Go out, for those skilled in the art, some improvement under the premise of the utility model principle is not departed from and
Retouching, these improvements and modifications also should be regarded as the scope of protection of the utility model.
Claims (3)
1. a kind of Portable rural distribution AC ice melting device based on AC-DC-AC Two Stages, it is characterised in that including intermediate frequency
Generator（1）, AC/DC rectifiers（2）, DC/AC inverters（3）With output connection unit（4）, the intermediate frequency generator（1）With
Pass through AC/DC rectifiers（2）, DC/AC inverters（3）, output connection unit（4）It is sequentially connected in series, exports connection unit（4）It is defeated
Go out end with treating that the target agriculture distribution line of ice-melt is connected.
2. the Portable rural distribution AC ice melting device according to claim 1 based on AC-DC-AC Two Stages, it is special
Sign is, the rectifier（2）Including three-phase uncontrollable rectifier bridge and dc-link capacitance.
3. the Portable rural distribution AC ice melting device according to claim 1 based on AC-DC-AC Two Stages, it is special
Sign is, the DC/AC inverters（3）It is made up of three phase inverter bridge, and three phase inverter bridge output end does not configure filtering unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721206988.2U CN207134727U (en) | 2017-09-20 | 2017-09-20 | Based on the Portable rural distribution AC ice melting device for handing over orthogonal Two Stages |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721206988.2U CN207134727U (en) | 2017-09-20 | 2017-09-20 | Based on the Portable rural distribution AC ice melting device for handing over orthogonal Two Stages |
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| Publication Number | Publication Date |
|---|---|
| CN207134727U true CN207134727U (en) | 2018-03-23 |
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| CN201721206988.2U Active CN207134727U (en) | 2017-09-20 | 2017-09-20 | Based on the Portable rural distribution AC ice melting device for handing over orthogonal Two Stages |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107482530A (en) * | 2017-09-20 | 2017-12-15 | 湖南省湘电试研技术有限公司 | Based on the Portable rural distribution exchange de-icing method and device for handing over orthogonal Two Stages |
| CN112054465A (en) * | 2020-07-22 | 2020-12-08 | 广东顺德电力设计院有限公司 | OPGW ice melting system |
-
2017
- 2017-09-20 CN CN201721206988.2U patent/CN207134727U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107482530A (en) * | 2017-09-20 | 2017-12-15 | 湖南省湘电试研技术有限公司 | Based on the Portable rural distribution exchange de-icing method and device for handing over orthogonal Two Stages |
| CN112054465A (en) * | 2020-07-22 | 2020-12-08 | 广东顺德电力设计院有限公司 | OPGW ice melting system |
| CN112054465B (en) * | 2020-07-22 | 2022-01-21 | 广东顺德电力设计院有限公司 | OPGW ice melting system |
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