CN210016248U - Electrified ice-melt device of distribution network - Google Patents
Electrified ice-melt device of distribution network Download PDFInfo
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- CN210016248U CN210016248U CN201921362629.5U CN201921362629U CN210016248U CN 210016248 U CN210016248 U CN 210016248U CN 201921362629 U CN201921362629 U CN 201921362629U CN 210016248 U CN210016248 U CN 210016248U
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Abstract
The utility model discloses an electrified ice melting device for a power distribution network, which comprises a reactor and a capacitor bank capable of adjusting the size of a capacitor, wherein one end of the reactor is electrically connected to the high-voltage wire inlet side of the power distribution network, and the other end of the reactor is grounded; one end of the capacitor bank is connected to the tail end of a high-voltage line of the power distribution network, and the other end of the capacitor bank is grounded. The distribution network adopts T-shaped connection, and the tail ends of the high-voltage wires of all the branch lines are respectively connected with one capacitor bank. The embodiment of the utility model provides a pair of electrified ice-melt device of distribution network, when the circuit icing, through the capacitive reactance value of adjusting the capacitor bank for total capacitive reactance offsets each other with total inductive reactance in the circuit, reaches RLC parallel resonance state, utilizes the electric current fuel factor effect that resonant circuit produced, reaches the ice-melt purpose. In the whole ice melting process, the ice-free line always keeps normal power supply, the electrified ice melting device is easy to operate and high in efficiency, and the influence of power failure on the load side of a power grid is avoided.
Description
Technical Field
The utility model belongs to the technical field of the distribution network ice-melt, especially, relate to an electrified ice-melt device of distribution network.
Background
China is one of the countries with serious ice coating of power lines. The damage of line icing is mainly shown in the aspects of pole-falling and line-breaking, insulator flashover, equipment damage, tripping and power failure and the like, and even can cause the power grid paralysis in severe cases. In recent years, under the influence of global warming, various meteorological disasters are more frequent, extreme weather and climatic events are more abnormal, the damage degree is stronger and stronger, and the loss and the influence are more serious. The transmission line in the alpine mountain area is easily influenced by extreme low-temperature freezing weather, and icing occurs, so that the line is broken, the pole falls and the tower falls, and the power supply reliability and the power supply safety are influenced.
The existing ice melting technology for the power distribution network has the following defects: the ice melting is required to be performed when the power is cut off, the operation amount is large, and the efficiency is low.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an electrified ice-melt device of distribution network need not have a power failure and can ice-melt, easy operation, efficient.
To achieve the purpose, the utility model adopts the following technical proposal:
a live ice melting device for a power distribution network comprises a reactor and a capacitor bank capable of adjusting the size of a capacitor, wherein one end of the reactor is electrically connected to the high-voltage line inlet side of the power distribution network, and the other end of the reactor is grounded; one end of the capacitor bank is connected to the tail end of a high-voltage line of the power distribution network, and the other end of the capacitor bank is grounded.
As an optional technical scheme of the utility model, the distribution network adopts T shape wiring, and all branch lines's high-voltage line end is connected with one respectively the capacitor bank.
As an optional technical solution of the present invention, the power distribution network includes a three-phase power distribution network high-voltage line, the incoming line side of the power distribution network high-voltage line of each phase is respectively connected with one of the reactors, one end of each of the three reactors is grounded, the end of the power distribution network high-voltage line of each phase is respectively connected with one of the capacitor banks, and one end of each of the three capacitor banks is grounded;
and secondary side inductors of a high-voltage distribution transformer of the high-voltage line of the three-phase power distribution network are sequentially connected end to end.
As an optional technical scheme of the utility model, every the capacitor bank comprises a plurality of condenser series connection, every the shell of condenser passes through the insulator to be fixed subaerial.
As an optional technical solution of the present invention, all the shells of the capacitors are electrically connected together through a wire.
As an optional technical solution of the present invention, the capacitor bank inter-electrode is connected in parallel with a metal oxide voltage limiter, a discharge gap and a bypass breaker.
As an alternative technical solution of the present invention, the capacitor bank and the metal oxide voltage limiter are connected in series with a damping reactance, the damping reactance is connected in series with a discharge gap and a bypass circuit breaker in parallel.
As an alternative technical scheme of the utility model, the capacitor bank through the automatic switch electricity connect in the distribution network high-voltage line is terminal.
As an optional technical solution of the present invention, the automatic switch is electrically connected with a controller for controlling the automatic switch to be turned on or off.
As an optional technical scheme of the utility model, the controller has upper computer control system through network communication connection.
Compared with the prior art, the embodiment of the utility model provides a following beneficial effect has:
the embodiment of the utility model provides a pair of electrified ice-melt device of distribution network, when the circuit icing, through the appearance reactance value of adjusting the capacitor bank for total appearance reactance in the circuit (including the appearance reactance of capacitor bank, circuit appearance reactance) and total inductance reactance in the circuit (including reactance, circuit reactance of reactor) offset each other, reach RLC parallel resonance state, utilize the electric current fuel effect that resonant circuit produced, reach the ice-melt purpose. In the whole ice melting process, the ice-free line always keeps normal power supply, the electrified ice melting device is easy to operate and high in efficiency, and the influence of power failure on the load side of a power grid is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.
The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.
Fig. 1 is a schematic diagram of an electrified ice melting device for a power distribution network provided by an embodiment of the present invention.
Fig. 2 is the embodiment of the utility model provides a three-phase power distribution network schematic diagram of electrified ice-melt device of distribution network.
Fig. 3 is a circuit diagram of a capacitor bank according to an embodiment of the present invention.
Illustration of the drawings:
the high-voltage line protection circuit comprises a high-voltage line inlet side 10, a high-voltage line tail end 11, a reactor 12, a capacitor bank 13, a high-voltage distribution transformer 14, a low-voltage distribution transformer 15, a shell 16, an insulator 17, a metal oxide voltage limiter 18, a discharge gap 19, a bypass breaker 20, a damping reactance 21 and a secondary side inductor 22.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the embodiments of the present invention are clearly and completely described with reference to the drawings in the embodiments of the present invention, and obviously, the embodiments described below are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The embodiment provides an electrified ice melting device for a power distribution network, which is installed in the power distribution network and used for melting ice under the condition of power failure, so that the operations of power failure, switch reversing, bus reversing and the like in the traditional ice melting method are omitted, the operation is simpler, and the efficiency is higher.
Generally, the distribution network comprises a high-voltage distribution transformer 14, a high-voltage line and a low-voltage distribution transformer 15, wherein the voltage in the high-voltage line is 10kV, and the output voltage of the low-voltage distribution transformer 15 is 380V.
In high voltage supply, a T-connection may also be present.
Referring to fig. 1, specifically, the live-line ice melting device for the power distribution network comprises a reactor 12 and a capacitor bank 13 capable of adjusting the size of a capacitor.
One end of the reactor 12 is electrically connected to the high-voltage line inlet side 10 of the power distribution network, and the other end of the reactor 12 is grounded; one end of the capacitor bank 13 is connected to the tail end 11 of the high-voltage line of the power distribution network, and the other end of the capacitor bank 13 is grounded. Therefore, under certain conditions, the reactor 12, the high-voltage line, and the capacitor bank 13 constitute an RLC parallel resonance circuit.
In the figure, the distribution network adopts a T-shaped connection, and the tail ends 11 of the high-voltage wires of all branch lines are respectively connected with one capacitor group 13.
Therefore, when icing occurs in the branch line extending horizontally in the figure, the capacitance reactance value of the capacitor bank 13 above is adjusted so that the line capacitance reactance and the line inductance reactance (including the reactor 12 inductance reactance, the line self inductance reactance, and the compensation reactor inductance reactance) cancel each other, that is, the RLC resonance condition is satisfied. At this time, the line is equivalent to a pure resistance circuit, and a large amount of heat is generated in the line to melt ice. In the whole ice melting process, the non-icing line (the branch in the vertical direction in the figure) always keeps normal power supply. By controlling the capacitor group 13 at the tail end 11 of each branch high-voltage line, resonance is only generated on the ice-coated line, and the full coverage of ice melting of any branch line in the power distribution network is realized.
The electrified ice melting device is easy to operate and high in efficiency, and the influence of power failure on the load side of a power grid is avoided.
Specifically, please refer to fig. 2. In a distribution network, three-phase (A, B, C three-phase) distribution network high-voltage lines are typically included.
The high-voltage line inlet side 10 of the power distribution network of each phase is respectively connected with one reactor 12, and one end of each of the three reactors 12 is grounded, namely, the three reactors 12 are connected to the high-voltage line inlet side 10 of the power distribution network by adopting a star connection method.
The tail end 11 of the high-voltage line of each phase of the power distribution network is connected with one capacitor group 13, and one ends of the three capacitor groups 13 are grounded; namely, three capacitor banks 13 are connected to the power distribution network by adopting a star connection method.
Specifically, one end of each of the three capacitor banks 13 is connected to A, B, C the tail end 11 of the three-phase high-voltage line, and the other ends of the three capacitor banks 13 are connected together. The star connection method has an advantage in that the terminal voltage applied to the capacitor bank 13 on each phase can be reduced.
Further, secondary side inductors 22 of the high-voltage distribution transformer 14 of the high-voltage line of the three-phase distribution network are sequentially connected end to end.
Therefore, when the lines are iced, the reactor 12 connected with the three phases, the secondary side inductor 22 of the high-voltage distribution transformer 14 of the high-voltage line of the three-phase distribution network, the capacitor bank 13 connected with the three phases and the high-voltage lines realize RLC parallel resonance, and the purpose of melting ice is achieved.
Further, please refer to fig. 3. Each capacitor bank 13 is composed of a plurality of capacitors connected in series, and each capacitor case 16 is fixed to the ground through an insulator 17 so that the respective capacitors are insulated from the ground.
All the capacitor cases 16 are electrically connected together by a wire so that the voltage of the capacitor cases 16 to ground is equal.
The capacitor bank 13 is connected in parallel with a metal oxide voltage limiter 18, a discharge gap 19 and a bypass breaker 20, the capacitor bank 13 and the metal oxide voltage limiter 18 are connected in series with a damping reactance 21, and the discharge gap 19 and the bypass breaker 20 which are connected in parallel are connected in series with the damping reactance 21 reactor 12 and the capacitor bank 13 and the metal oxide voltage limiter 18 which are connected in parallel. The metal oxide voltage limiter 18, the discharge gap 19, the bypass breaker 20 and the damping reactance 21 act as overvoltage protection means at resonance.
In another embodiment of the present application, the capacitor bank 13 is electrically connected to the distribution network high voltage line end 11 via an automatic switch (not shown). The automatic switch is electrically connected with a controller (not shown in the figure) for controlling the on/off of the automatic switch. The controller is connected with an upper computer control system (not shown in the figure) through network communication. When the line is found to be iced, a closing command is sent to the controller through the upper computer control system, so that the automatic switch is closed, and the capacitance reactance value of the capacitor bank 13 starts to be adjusted.
The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are intended to be inclusive and therefore specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order discussed and illustrated, unless explicitly indicated as an order of performance. It should also be understood that additional or alternative steps may be employed.
When an element or layer is referred to as being "on" … … "," engaged with "… …", "connected to" or "coupled to" another element or layer, it can be directly on, engaged with, connected to or coupled to the other element or layer, or intervening elements or layers may also be present. In contrast, when an element or layer is referred to as being "directly on … …," "directly engaged with … …," "directly connected to" or "directly coupled to" another element or layer, there may be no intervening elements or layers present. Other words used to describe the relationship of elements should be interpreted in a similar manner (e.g., "between … …" and "directly between … …", "adjacent" and "directly adjacent", etc.). As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region or section from another element, component, region or section. Unless clearly indicated by the context, use of terms such as the terms "first," "second," and other numerical values herein does not imply a sequence or order. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
Spatially relative terms, such as "inner," "outer," "below," "… …," "lower," "above," "upper," and the like, may be used herein for ease of description to describe a relationship between one element or feature and one or more other elements or features as illustrated in the figures. Spatially relative terms may be intended to encompass different orientations of the device in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the example term "below … …" can encompass both an orientation of facing upward and downward. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. The electrified ice melting device for the power distribution network is characterized by comprising a reactor and a capacitor bank capable of adjusting the size of a capacitor, wherein one end of the reactor is electrically connected to the high-voltage wire inlet side of the power distribution network, and the other end of the reactor is grounded; one end of the capacitor bank is connected to the tail end of a high-voltage line of the power distribution network, and the other end of the capacitor bank is grounded.
2. The live deicing device for the power distribution network according to claim 1, wherein the power distribution network adopts a T-shaped connection, and the tail ends of the high-voltage wires of all branch lines are respectively connected with one capacitor bank.
3. The electrified ice melting device for the power distribution network according to claim 1, wherein the power distribution network comprises three-phase power distribution network high-voltage wires, the incoming line side of each phase of the power distribution network high-voltage wire is respectively connected with one reactor, one end of each reactor is connected with the same ground, the tail end of each phase of the power distribution network high-voltage wire is respectively connected with one capacitor bank, and one end of each capacitor bank is connected with the same ground;
and secondary side inductors of a high-voltage distribution transformer of the high-voltage line of the three-phase power distribution network are sequentially connected end to end.
4. The live deicing device for the power distribution network as claimed in claim 1, wherein each capacitor bank is formed by connecting a plurality of capacitors in series, and a housing of each capacitor is fixed on the ground through an insulator.
5. The live deicing device for power distribution networks of claim 4, wherein the shells of all the capacitors are electrically connected together through a conducting wire.
6. The live deicing device for power distribution networks of claim 5, wherein metal oxide voltage limiters, discharge gaps and bypass circuit breakers are connected in parallel between the capacitor banks.
7. The live deicing device for the power distribution network according to claim 6, wherein the capacitor bank and the metal oxide voltage limiter are connected in series with a damping reactance, and the damping reactance is connected in series with the discharge gap and the bypass breaker which are connected in parallel with each other.
8. The live deicing device for power distribution networks of claim 1, wherein the capacitor bank is electrically connected to the end of the high-voltage line of the power distribution network through an automatic switch.
9. The live deicing device for the power distribution network according to claim 8, wherein the automatic switch is electrically connected with a controller for controlling the automatic switch to be turned on or off.
10. The live deicing device for the power distribution network according to claim 9, wherein the controller is connected with an upper computer control system through network communication.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921362629.5U CN210016248U (en) | 2019-08-21 | 2019-08-21 | Electrified ice-melt device of distribution network |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921362629.5U CN210016248U (en) | 2019-08-21 | 2019-08-21 | Electrified ice-melt device of distribution network |
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| CN210016248U true CN210016248U (en) | 2020-02-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110336238A (en) * | 2019-08-21 | 2019-10-15 | 广东电网有限责任公司 | A kind of power distribution network electrification deicing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110336238A (en) * | 2019-08-21 | 2019-10-15 | 广东电网有限责任公司 | A kind of power distribution network electrification deicing device |
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