CN207181482U - A kind of high pressure partial pressure arm and high-voltage electric energy meter - Google Patents
A kind of high pressure partial pressure arm and high-voltage electric energy meter Download PDFInfo
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- CN207181482U CN207181482U CN201721222555.6U CN201721222555U CN207181482U CN 207181482 U CN207181482 U CN 207181482U CN 201721222555 U CN201721222555 U CN 201721222555U CN 207181482 U CN207181482 U CN 207181482U
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Abstract
A kind of high pressure partial pressure arm and high-voltage electric energy meter are the utility model is related to, belongs to electric-power metering technical field.The high pressure partial pressure arm includes：RC divider and resitstance voltage divider.Resitstance voltage divider includes：First circuit board and the multiple first resistors being arranged on first circuit board, multiple first resistors are sequentially connected in series to form resistance string, and each first resistor is the low resistance that surface scribbles insulating materials in multiple first resistors.RC divider includes：Second circuit board and multiple first electric capacity and the multiple second resistances being arranged on second circuit board, multiple second resistances to form capacitance-resistance string with interlaced connect of multiple first electric capacity, each first electric capacity is low-voltage capacitance in multiple first electric capacity, the low resistance that each second resistance is in multiple second resistances.Voltage is sampled using resitstance voltage divider, while partial pressure is carried out using RC divider, it is small volume, low in energy consumption, solve the problems such as Ferroresonance Overvoltage Caused by PT, high-frequency percussion short circuit, axially climb electricity.
Description
Technical field
The utility model belongs to electric-power metering technical field, and in particular to a kind of high pressure partial pressure arm and high-voltage electric energy meter.
Background technology
At present in China 6-35kV power distribution network, most traditional way of energy measuring is to use electromagnetic type high tension voltage
Transformer, current transformer and low -voltage Watt -hour meter combine, and originally voltage transformer, the primary side of current transformer directly connect
Enter to high-pressure side, secondary side and access voltage power table, high withstand voltage is isolated between first and second side.This conventional high-tension table volume is huge
Electricity stealing easily occurs for greatly, heavy, not easy to install and low-pressure end.To developing a kind of new high-tension electricity in this later industry
Energy table, first and second side is brought together by this high pressure gauge, and is directly accessed high-pressure side, is solved conventional high-tension table and is met
The many problems arrived.For this new high-voltage electric energy meter, due to being directly operated in high-pressure side, the working power of electric energy meter
Into a problem.
For traditional high-voltage electric energy meter, occur carrying out voltage sampling metering using high-tension electricity perhaps high-tension resistive and take
The electric energy meter of electricity.Relative to conventional high-tension electric energy meter, novel high-pressure electric energy meter solves its related defects, but new height
Pressure electric energy meter remains many deficiencies.When carrying out partial pressure sampling using high-voltage capacitance, because high-voltage capacitance works long hours
With it is affected by temperature, it will produce aging and decay, meanwhile, the self-healing performance of electric capacity also leads to electricity in the course of the work
The change of capacity.Additionally, due to the self-healing performance of high-voltage capacitance in itself, electric capacity inside partial pressure is uneven, what electric field was more concentrated
Portion voltage is high, and leakage current can be caused big；And for the power supply of purely capacitive partial pressure, in the case of without hindrance buffer resistance, electric capacity exists
By the change and internal electric field skewness for during high-frequency percussion being in short-circuit condition, poor reliability, while Leakage Current all
Other circuits can be disturbed, influence high pressure meter accuracy；In addition, high pressure axial direction electric capacity is being filled directly across between two-phase high pressure
Air gap easily is being formed along face after insulating materials, in overvoltage or in the case of being impacted, because creep age distance is not enough present
The risk that electrical breakdown or leakage current increase cause error in dipping to change is climbed along face；And the complex manufacturing of high-voltage capacitance, into
This height.
And when using high-tension resistive progress partial pressure sampling, because the temperature drift of high-tension resistive is big, resistance occurs after heating
Change, causes measurement accuracy to be forbidden.Simultaneously as there is distribution capacity and distributed inductance in high-tension resistive so that the angular difference of voltage
Value measurement is affected, and the degree of accuracy is not high in the case of perception and capacitive load.In addition, the metal link position of high-tension resistive
It is few, general both ends connection, it is unfavorable for increasing resistance radiating contact surface, resistance heat after heating dissipates not open, and forms temperature drift,
Sampling precision is influenceed, so as to influence the trueness error of electric energy meter.In addition, high pressure axial direction resistance directly across two-phase high pressure it
Between, air gap easily is being formed along face after fill insulant, in overvoltage or in the case of being impacted, because of creep age distance not
Enough exist along face and climb the risk that electrical breakdown or leakage current increase cause error in dipping to change.Therefore, a kind of new high pressure is needed badly
Way to take power solves these defects of high-voltage electric energy meter.
Utility model content
In consideration of it, the purpose of this utility model is to provide a kind of high pressure partial pressure arm and high-voltage electric energy meter, effectively to change
Kind above mentioned problem.
What embodiment of the present utility model was realized in：
The utility model embodiment provides a kind of high pressure partial pressure arm, including：RC divider and resitstance voltage divider.It is described
Resitstance voltage divider includes：First circuit board and the multiple first resistors being arranged on the first circuit board.The multiple first
Resistance is sequentially connected in series to form resistance string, and each first resistor is the low pressure that surface scribbles insulating materials in the multiple first resistor
Resistance.The RC divider includes：Second circuit board and multiple first electric capacity for being arranged on the second circuit board and
Multiple second resistances.The multiple second resistance to form capacitance-resistance string with interlaced connect of the multiple first electric capacity, described more
Each first electric capacity is low-voltage capacitance in individual first electric capacity, and each second resistance is low resistance in the multiple second resistance.
It is logical per two adjacent first resistors in the multiple first resistor in the utility model preferred embodiment
Cross the copper foil connection being arranged on the first circuit board.
In the utility model preferred embodiment, the multiple first electric capacity is N number of, and the multiple second resistance is N+
1, the N+1 second resistances to form capacitance-resistance string with interlaced connect of N number of first electric capacity, the starting of the capacitance-resistance string
Hold as a second resistance in the multiple second resistance, the ending end of the capacitance-resistance string is in the multiple second resistance
Another second resistance.
In the utility model preferred embodiment, the multiple first resistor is not provided with the first circuit board
Region is provided with multiple first hollow-out slot bores.
In the utility model preferred embodiment, be not provided with the second circuit board the multiple second resistance and
The region of the multiple first electric capacity is provided with multiple second hollow-out slot bores.
The utility model embodiment additionally provides a kind of high-voltage electric energy meter, including：A phases input, B phases input, C phases are defeated
Enter end, A phases measure converting unit, B is harmonious, and facies unit, C phases measure converting unit, A phases Switching Power Supply, B phases Switching Power Supply, C phases
Switching Power Supply and two above-mentioned high pressure partial pressure arms.Two high pressure partial pressure arms are respectively that the first high pressure partial pressure arm and second are high
Press partial pressure arm.The A phases input is contacted with the B phases input by the first resistor in the first high pressure partial pressure arm
Connect, and also connect by the first capacitance-resistance series winding in the first high pressure partial pressure arm.The C phases input inputs with the B phases
End is contacted by second resistance in the second high pressure partial pressure arm and connect, and also passes through the in the second high pressure partial pressure arm
Two capacitance-resistances series winding connects.The voltage of A phases measures converting unit, AB phases via the A phases are conveyed to after the first resistor string partial pressure
Between voltage via being conveyed to the A phases Switching Power Supply and the B phases Switching Power Supply respectively after the first capacitance-resistance string partial pressure.C
The voltage of phase measures converting unit via being conveyed to the C phases after the second high resistance string partial pressure, voltage alternate BC via
The C phases Switching Power Supply and the B phases Switching Power Supply are conveyed to respectively after the first capacitance-resistance string partial pressure.The A phases switch electricity
It is that the operating voltage that the A phases measure needed for converting unit work is its power supply that source, which is used for the alternate voltage conversions of AB,.The B
It is that the operating voltage that the B is harmonious needed for facies unit work is its power supply that phase Switching Power Supply, which is used for the alternate voltage conversions of ABC,.
It is that the C phases measure the required operating voltage of converting unit work that the C phases Switching Power Supply, which is used for voltage conversion alternate BC,
Powered for it.
In the utility model preferred embodiment, the A phases Switching Power Supply, the B phases Switching Power Supply are opened with the C phases
Powered-down source includes：Input rectifying device, high frequency means for anti-jamming, PFC devices, DC chopped-wave device and output rectification filter dress
Put, the input rectifying device, the high frequency means for anti-jamming, the PFC devices, the DC chopped-wave device and the output
Straightening and filtering unit is sequentially connected；The input rectifying device is used for the ac voltage rectifier after partial pressure into high direct voltage；Institute
State high frequency means for anti-jamming to be used to filter the electromagnetic interference signal in the high direct voltage, obtain filtered high direct voltage；It is described
PFC devices are used for the power factor for correcting the filtered high direct voltage, obtain calibrated high direct voltage；The DC chopped-wave dress
Put for the calibrated DC voltage to be cut as high-frequency ac voltage；The output rectification filter device is used for the high frequency
Alternating voltage carries out rectification, filtering and voltage stabilizing, obtains the low-voltage dc power supply simultaneously needed for output loading.
In the utility model preferred embodiment, the DC chopped-wave device includes：RCD circuits, pwm circuit and transformation
Device；Input of the RCD circuits respectively with the pwm circuit, the PFC devices and the transformer is connected, the PWM electricity
Input of the road respectively with the PFC devices and the transformer is connected；The pwm circuit passes through the metal-oxide-semiconductor that controls it to include
On or off, the calibrated DC voltage is cut as high-frequency ac voltage；The transformer is used to hand over the high frequency
Stream voltage becomes the output of high-frequency ac low-voltage signal, and the RCD circuits are used to absorb caused reversely electricity after the metal-oxide-semiconductor turns off
Pressure.
In the utility model preferred embodiment, the high frequency means for anti-jamming includes：Overvoltage crowbar and first
Filter circuit, the overvoltage crowbar are connected with the input rectifying device and first filter circuit respectively, and described
One filter circuit is connected with the PFC devices.
In the utility model preferred embodiment, the A phases Switching Power Supply, the B phases Switching Power Supply are opened with the C phases
Powered-down source also includes：Sampling feedback device, the sampling feedback device respectively with the DC chopped-wave device and the output
Straightening and filtering unit connects, and is fed back to for being sampled to the low-voltage dc power supply, and by the sampled signal for sampling acquisition
The DC chopped-wave device, so that the DC chopped-wave device is according to the sampled signal, voltage that de-regulation is exported.
The beneficial effects of the utility model are：
The high pressure partial pressure arm and high-voltage electric energy meter that the utility model embodiment provides, compared with prior art, the high pressure point
Pressure arm is sampled by the way of the series connection of multiple first resistors to voltage, and small volume is low in energy consumption, adds dissipating for first resistor
Thermal interface, it is easy to radiate, improves sampling precision, so as to reduce the trueness error of electric energy meter, solves voltage transformer
The problem of caused ferromagnetic resonance；Meanwhile using multiple second resistances and the interlaced series connection partial pressure of multiple first electric capacity, volume
It is small, low in energy consumption, solve the problems such as Ferroresonance Overvoltage Caused by PT, high-frequency percussion short circuit, axially climb electricity.Further, since low pressure
The temperature drift of resistance is small, is affected by temperature small, further improves measurement accuracy.Additionally, due to the electricity that the RC divider is connected
Resistance resistance is equal equal with capacitor's capacity, and therefore, the partial pressure of individual unit is uniform, and Electric Field Distribution is uniform, improves the anti-of circuit
Interference performance.The utility model possesses：Good reliability, safety coefficient are high, insulation effect is good, small volume, low in energy consumption, cost is low etc.
Plurality of advantages.
Other feature and advantage of the present utility model will illustrate in subsequent specification, also, partly from specification
Become apparent, or understood by implementing the utility model embodiment.The purpose of this utility model and other advantages can
Realize and obtain by specifically noted structure in the specification, claims and accompanying drawing write.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
In the required accompanying drawing used be briefly described, it should be apparent that, drawings in the following description are only of the present utility model
Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this
A little accompanying drawings obtain other accompanying drawings.By shown in accompanying drawing, above and other purpose of the present utility model, feature and advantage will more
Clearly.The identical reference instruction identical part in whole accompanying drawings.Do not painted by actual size equal proportion scaling deliberately
Accompanying drawing processed, it is preferred that emphasis is show purport of the present utility model.
Fig. 1 shows a kind of structural representation for high pressure partial pressure arm that the utility model embodiment provides.
Fig. 2 shows the structural representation of the resitstance voltage divider in Fig. 1 that the utility model embodiment provides.
Fig. 3 shows the structural representation of the RC divider in Fig. 1 that the utility model embodiment provides.
Fig. 4 shows a kind of structured flowchart for high-voltage electric energy meter that the utility model embodiment provides.
Fig. 5 shows a kind of module frame chart for Switching Power Supply that the utility model embodiment provides.
Fig. 6 shows a kind of circuit theory diagrams for Switching Power Supply that the utility model embodiment provides.
Icon：10- high pressure partial pressure arms；11- resitstance voltage dividers；111- first circuit boards；112- first resistors；
The locating parts of 113- first；The locating parts of 114- second；115- copper foils；The hollow-out slot bores of 116- first；12- RC dividers；
121- second circuit boards；The electric capacity of 122- first；123- second resistances；The locating parts of 124- the 3rd；The locating parts of 125- the 4th；
The hollow-out slot bores of 126- second；13- insulating sleeves；131- full skirts；132- fillers；20- high-voltage electric energy meters；21-A phases are counted
Measure converting unit；22-B is harmonious facies unit；23-C phases measure converting unit；24-A phase Switching Power Supplies；25-B phases switch electricity
Source；26-C phase Switching Power Supplies；30- input rectifying devices；31- high frequency means for anti-jammings；311- overvoltage crowbars；
The filter circuits of 312- first；32-PFC devices；33- DC chopped-wave devices；331-RCD circuits；332-PWM circuits；
333- transformers；34- output rectification filter devices；35- sampling feedback devices；The filter circuits of 351- second；352- optocouplers
Clutch；353- samples comparison circuit.
Embodiment
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer
Accompanying drawing in type embodiment, the technical scheme in the embodiment of the utility model is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model part of the embodiment, rather than whole embodiments.Generally here described in accompanying drawing and
The component of the utility model embodiment shown can be configured to arrange and design with a variety of.
Therefore, the detailed description of the embodiment of the present utility model to providing in the accompanying drawings is not intended to limit requirement below
The scope of the utility model of protection, but it is merely representative of selected embodiment of the present utility model.Based in the utility model
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, all
Belong to the scope of the utility model protection.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent accompanying drawing in individual accompanying drawing.
, it is necessary to explanation in description of the present utility model, term " " center ", " on ", " under ", "left", "right",
The orientation or position relationship of the instructions such as " interior ", " outer " be based on orientation shown in the drawings or position relationship, or practicality newly
Type product using when the orientation usually put or position relationship, be for only for ease of description the utility model and simplify and describe, and
It is not instruction or implies signified device or element there must be specific orientation, with specific azimuth configuration and operation, therefore
It is not intended that to limitation of the present utility model.In addition, term " first ", " second ", " the 3rd " etc. are only used for distinguishing description, and
It is not intended that instruction or hint relative importance.
In description of the present utility model, it is also necessary to which explanation, unless otherwise clearly defined and limited, term " are set
Put ", " installation ", " connected ", " connection ", " coupling " should be interpreted broadly, for example, it may be being fixedly connected or removable
Connection is unloaded, or is integrally connected；Can be mechanical connection or electrical connection；Can be joined directly together, can also be in
Between medium be indirectly connected, can be the connection of two element internals.For the ordinary skill in the art, can be specific
Situation understands concrete meaning of the above-mentioned term in the utility model.
The utility model embodiment has carried a kind of high pressure partial pressure arm 10, as shown in Figure 1.The high pressure partial pressure arm 10 includes：Resistance
Hold divider 12, resitstance voltage divider 11 and insulating sleeve 13.
The resitstance voltage divider 11 and RC divider 12 are introduced point situation below, as shown in Fig. 2 the resistance
Divider 11 includes：First circuit board 111 and the multiple first resistors 112 being installed on first circuit board 111.
The first circuit board 111 is used to install first resistor 112, during installation, according to the design of S types by the first all electricity
112 uniform distributing installations are hindered on the first circuit board 111.In order to increase creepage distance, security performance during operation is improved
Deng, it is preferable that the region that the first resistor 112 is not installed with the first circuit board 111 is provided with multiple first hollow outs
Slotted eye 116, it is further preferred that the centre of the first circuit board 111 and front/rear both sides are fitted without the area of first resistor 112
Domain is provided with multiple first hollow-out slot bores 116.In addition, for the ease of fixing the first circuit board 111, it is preferable that this first
One end of circuit board 111 is provided with the first locating part 113, and the other end of the first circuit board 111 is provided with the second locating part
114.Wherein it is preferred to first locating part 113 can be a raised spacing catwalk, second locating part 114
It can be a raised spacing catwalk.
Multiple first resistors 112 are sequentially connected in series to form resistance string, form multiple first resistors in the resistance string
112 S-type are arranged on the first circuit board 111.In order to increase the area of dissipation of first resistor 112, reduce first resistor
112 temperature drift, improve the measurement accuracy of electric energy meter, it is preferable that adjacent two first resistor on first circuit board 111
The region of 112 connections is covered with copper foil 115.In other words, each two adjacent first resistors in the multiple first resistor 112
112 are connected by copper foil 115, and multiple copper foils 115 are arranged on the first circuit board 111.The copper foil 115 and first
Resistance 112 is joined directly together, and adds the area of dissipation of first resistor 112, reduces the temperature drift of first resistor 112, so as to reduce
The measurement error of electric energy meter.Wherein, the black portions in Fig. 2 be it is above-mentioned in copper foil 115.
It is arranged in wherein it is preferred to which multiple first resistors 112 in above-mentioned are S-type on the first circuit board 111,
It can be made up of multiple small S types, specifically, first circuit board 111 is divided into lower regions, the resistance of lower regions is mutual
Staggeredly, multiple small S types curves are formed, it is in cosine or sine or square-wave-shaped that it is overall, as shown in the arrangement mode in Fig. 2.
In order to cost-effective, it is preferable that all first resistors 112 are the low resistance that surface scribbles insulating materials,
Due to the simple production process of single small resistor, so cost is low.In addition, the temperature drift of low resistance is small, and every degree Celsius of change is drawn
The temperature drift risen can accomplish below 10ppm, and the temperature drift of high-tension resistive can only be controlled in below 25ppm, therefore, further increased
The measurement accuracy of electric energy meter.It is further preferred that the first resistor 112 is the low resistance being made up of metal oxide film, relatively
For line geometric pattern resistance, distribution-free electric capacity and inductance, the measurement accuracy of electric energy meter can be further improved.
Wherein, the quantity of the first resistor 112 can according to the relevant parameters such as the pressure-resistant of the first resistor 112, power with
And the voltage of accessed power network determines.
Wherein it is preferred to one end of first first resistor 112 in the resistance string is connected with the first terminals,
One end of last first resistor 112 is connected with the second terminals.For example, as shown in Figure 2, positioned at first circuit
The upper left first resistor 112 of plate 111 is first resistance in resistance string, below the upper right of first circuit board 111
First resistor 112 is the last resistor in resistance string.
Preferably, the resistance parameter that the resitstance voltage divider 11 is connected is identical, and therefore, Electric Field Distribution is uniform, i.e. the resistance
The resistance that divider 11 is connected is first resistor 112, and therefore, the resistance parameter connected is identical.In addition, the electric resistance partial pressure
Device 11 is sampled by the way of the series connection of multiple small resistors to voltage, and small volume is low in energy consumption, has evaded and has used voltage transformer
The risk of ferromagnetic resonance caused by sampled voltage.
Preferably, as shown in figure 3, the RC divider 12 includes：Second circuit board 121 and be installed on it is described second electricity
Multiple first electric capacity 122 and multiple second resistances 123 on road plate 121.
The second circuit board 121 is used for multiple first electric capacity 122 of welded and installed and multiple second resistances 123, during welding,
According to the design of S types, by all electric capacity 122 of second resistance 123 and first, uniformly distribution is welded on the second circuit board 121.
In order to increase creepage distance, the security performance etc. when running is improved, it is preferable that be not installed with institute on the second circuit board 121
The region for stating the first electric capacity 122 and the second resistance 123 is provided with multiple second hollow-out slot bores 126, it is further preferred that should
The part that the front/rear both sides of second circuit board 121 are fitted without the electric capacity 122 of second resistance 123 and first is hollow out.In addition,
For the ease of fixing the second circuit board 121, it is preferable that one end of the second circuit board 121 is provided with the 3rd locating part 124,
The other end of the second circuit board 121 is provided with the 4th locating part 125.Wherein it is preferred to the 3rd locating part 124 can be with
For a raised spacing catwalk, the 4th locating part 125 can also be a raised spacing catwalk.
The multiple second resistance 123 to form capacitance-resistance string with interlaced connect of the multiple first electric capacity 122, preferably
Ground, the second resistance 123 are N+1, and first electric capacity 122 is N number of.N+1 second resistances 123 with it is N number of described
First electric capacity, 122 interlaced series connection, i.e., according to second resistance 123, the first electric capacity 122, second resistance 123, the first electric capacity
122 ... first electric capacity 122, the rule of second resistance 123 are sequentially connected in series to form capacitance-resistance string, form the N+1 in the capacitance-resistance string
The individual second resistance 123 with N number of first electric capacity 122 is S-type is arranged on the second circuit board 121.Described second
The both ends of circuit board 121 are provided with the second resistance 123, second electricity positioned at described one end of second circuit board 121
Resistance 123 is connected with the first terminals, positioned at the wiring of the second resistance 123 and second of the other end of second circuit board 121
End connection.
Wherein it is preferred to the N+1 second resistances 123 and N number of first electric capacity, 122 S-type arrangement in above-mentioned
Form on the second circuit board 121 or by multiple small S types, specifically, second circuit board 121 is divided into
In lower region, lower regions are used to install second resistance 123, and intermediate region is used to install the first electric capacity 122, the electricity of lower regions
The electric capacity of resistance and intermediate region is interlaced, forms multiple small S types curves, and it is in integrally cosine or sine or square-wave-shaped, such as Fig. 3
In arrangement mode shown in.
In order to cost-effective, it is preferable that all second resistances 123 are low pressure small resistor, the first all electric capacity 122
It is low pressure small capacitances, due to the simple production process of single small resistor and small capacitances, so cost is low.It is further preferred that
First electric capacity 122 is CBB low-voltage capacitances, i.e. polypropylene low-voltage capacitance.For mica capacitor, the CBB low-voltage capacitances
Nonpolarity, insulation impedance is high, and self-healing property is strong etc., can further improve the reliability of electric energy meter.The second resistance 123 be line around
The low resistance of type, good shock resistance effect can be played.
Wherein it is possible to according to pressure-resistant, the power of single second resistance 123, single the pressure-resistant of first electric capacity 122, capacitance etc.
The voltage of relevant parameter and accessed power network determines the quantity of the electric capacity 122 of second resistance 123 and first.
The RC divider 12 is interlaced by second resistance 123 (wire-wound resistor) and the first electric capacity 122 (CBB electric capacity)
Powered after partial pressure of connecting to high-voltage electric energy meter.The resistance connected by the RC divider 12 is equal and capacitor's capacity phase
Deng therefore, the partial pressure of individual unit is uniform, and Electric Field Distribution is uniform, i.e., the electric capacity that the RC divider 12 is connected is first
Electric capacity 122, therefore, the capacitor's capacity connected are equal；The resistance that the RC divider 12 is connected is second resistance 123,
Therefore, the resistance connected is equal.In addition, the RC divider 12 is connected using the electric capacity 122 of second resistance 123 and first
Partial pressure, it is small volume, low in energy consumption, solve the problems, such as Ferroresonance Overvoltage Caused by PT.
Resitstance voltage divider 11 and RC divider 12 are installed in the insulating sleeve 13, the insulating sleeve 13 is applied to height
Press in electric energy meter.In order to improve the insulating properties between binding post, it is preferable that be filled with the insulating sleeve 13 by insulation material
Expect the filler 132 formed, the filler 132 is used for multiple first hollow slots on the first circuit board 111
Insulating wall is formed at hole 116.In other words, meeting shape between the first resistor 112 of first circuit board 111 after insulating materials embedding
Into a stifled insulating wall, the creep age distance between two first resistors 112 is added, so as to add two alternate creep age distances,
Solve the problems such as creeping discharge and bubble-discharge that axial high-tension resistive is formed because surface does not bond, it is alternate to improve two
Insulating properties.And the filler 132 is additionally operable to multiple second hollow-out slot bores 126 on the second circuit board 121
Place forms insulating wall.In other words, meeting shape between the metal pins being exposed on second circuit board 121 after insulating materials embedding
Into a stifled insulating wall, the creep age distance between two metal pins is added, so as to add two alternate creep age distances, is solved
The problems such as creeping discharge that axial high-voltage capacitance is formed because surface does not bond and bubble-discharge, improve two alternate insulation
Performance.
In addition, in order to further increase the creep age distance outside two alternate insulating sleeves 13, it is preferable that the insulating sleeve 13
Multiple full skirts 131 are externally provided with, the full skirt 131 is the annular relief being made up of insulating materials.It is it is further preferred that the plurality of
Annular relief is arranged at outside the insulating sleeve 13 at equal intervals, safe for operation to ensure for increasing the creep age distance of external insulation.
Wherein, the distance between adjacent annular lug boss requires to design according to the standard of insulator, and its security performance is higher.Wherein, it is excellent
Selection of land, the plurality of annular relief and insulating sleeve 13 are formed in one structure.
Wherein, the material of the insulating sleeve 13 can be plastic material or quality of rubber materials or glass fibers
Dimension；And the species of plastic material can have it is a variety of, for example, polyethylene terephthalate (Polyethylene
Terephthalate, PET), polyethylene (polyethylene, PE), polypropylene (Polypropylene, PP) etc..Rubber material
The species of matter can also have it is a variety of, for example, silica gel, neoprene, fluorine glue, SGA etc..In the present embodiment, it is preferable that
The insulating sleeve 13 is glass fibre sleeve.
Wherein, the material for the filler 132 being filled in insulating sleeve 13, the i.e. insulating materials can be plastic materials
Or quality of rubber materials；And the species of plastic material can have it is a variety of, for example, polyethylene terephthalate
(Polyethylene terephthalate, PET), polyethylene (polyethylene, PE), polypropylene
(Polypropylene, PP) etc..The species of quality of rubber materials can also have it is a variety of, for example, silica gel, neoprene, fluorine glue, acrylic acid
Ester gum etc..In the present embodiment, it is preferable that the material of insulating materials can be silica gel.
The utility model embodiment additionally provides a kind of high-voltage electric energy meter 20, as shown in Figure 4.The high-voltage electric energy meter 20 wraps
Include：A phases input, B phases input, C phases input, A phases measure converting unit 21, B is harmonious, and facies unit 22, C phases measure conversion
Unit 23, A phases Switching Power Supply 24, B phases Switching Power Supply 25, C phases Switching Power Supply 26 and two above-mentioned high pressure partial pressure arms 10.Its
In, for the ease of difference, two high pressure partial pressure arms 10 might as well be respectively designated as the first high pressure partial pressure arm (left side in Fig. 4)
With the second high pressure partial pressure arm (the right in Fig. 4).
The A phases input is connected with the B phases input by the resistance string in the first high pressure partial pressure arm, and
Also connect by the capacitance-resistance series winding in the first high pressure partial pressure arm.The voltage of A phases is via the electricity in the first high pressure partial pressure arm
Become a small voltage after resistance string partial pressure and be conveyed to the A phases to measure converting unit 21, for measuring the voltage of A phases.Further
Ground, by Rja1 to the RjaN resistance strings that are connected into of N number of low resistance altogether, with low voltage RVa1 by the alternate voltages of A into
A phases are input to after low-voltage Ua and measure converting unit 21.The electric current of A phases becomes a low current after current transformer A samplings
Signal Ia is conveyed to the A phases and measures converting unit 21, for measuring the electric current of A phases.
The C phases input is connected with the B phases input by the resistance string in the second high pressure partial pressure arm, and
Also connect by the capacitance-resistance series winding in the second high pressure partial pressure arm.The voltage of C phases is via the electricity in the second high pressure partial pressure arm
The C phases are conveyed to after resistance string partial pressure and measure converting unit 23, for measuring the voltage of C phases.Further, by Rjc1 to RjcN
The resistance string that is connected into of N number of low resistance altogether, with low voltage RVc1 by the alternate voltages of C into being input to after low-voltage Uc
C phases measure converting unit 23.The electric current of C phases becomes a low current signal Ic after current transformer C samplings and is conveyed to the C
Mutually metering converting unit 23, for measuring the electric current of C phases.
Wherein, A phases measure converting unit 21 using A phase lines as reference ground, voltage, electric current, power for measuring A phases etc.
Parameter, and the continuous data of acquisition is converted into optical signal, the B facies units 22 that are harmonious are delivered to by optical fiber and calculates and closes first energy consumption.
Wherein, B is harmonious facies unit 22 for handling the continuous data of A phases and the continuous data of C phases, calculates its conjunction
First energy consumption, and it is transmitted to control terminal.Preferably, the B facies units 22 that are harmonious include：Processing unit, optical-electrical converter and
Communication unit (not shown).Wherein, the optical-electrical converter is used to convert the optical signal of the first metering converting unit conveying
It is electric signal transmission to processing unit, meanwhile, the optical-electrical converter is used to turn the optical signal of the second metering converting unit conveying
Electric signal transmission is turned to processing unit, so that processing unit is handled the continuous data of A phases and the continuous data of C phases,
Calculate it and close first energy consumption, and it is transferred to terminal by communication unit (mode such as wired or wireless).
The processing unit can be a kind of IC chip, have the disposal ability of signal.Above-mentioned processing unit
Can be general processor, including central processing unit (Central Processing Unit, CPU), network processing unit
(Network Processor, NP) etc.；Can also be digital signal processor (Digital Signal Processing,
DSP), application specific integrated circuit (Application Specific Integrated Circuit, ASIC), ready-made programmable gate
Array (Field Programmable Gate Array, FPGA) either other PLDs, discrete gate or crystal
Pipe logical device, discrete hardware components.General processor can be microprocessor (Micro Controller Unit, MCU) or
Person's processing unit can also be any conventional processor etc..In the present embodiment, it is preferable that the processing unit is MCU.
Wherein, the communication unit can be wireless communication module, for example, it may be WiFi module, ZigBee module, 3G moulds
Block, 4G modules, or other meet the wireless transport module of condition.In the present embodiment, it is preferable that the communication unit can be
3G module, for example, it may be the model such as SIM6320C, CEM631, CEM600, WIDE M8800, FWP103, K3G, WM9881
3G module.
Wherein, C phases measure converting unit 23 using C phase lines as reference ground, voltage, electric current, power for measuring C phases etc.
Parameter, and the continuous data of acquisition is converted into optical signal, the B facies units 22 that are harmonious are delivered to by optical fiber and calculates and closes first energy consumption.
Voltage alternate AB is opened via being conveyed to the A phases respectively after the capacitance-resistance string partial pressure in the first high pressure partial pressure arm
Powered-down source 24 and the B phases Switching Power Supply 25.Further, by the common N+1 low resistance of Ra1 to Ra (N+1) and Ca1 to CaN
The interlaced capacitance-resistance string being connected into of N number of low-voltage capacitance altogether, bleeder circuit is formed with Cab1, Cba1, the alternate voltages of AB are pressed
Proportion divider is taken to be changed to be conveyed to A pictures Switching Power Supply 24 after low-voltage Uab, and by voltage alternate AB proportionally
Partial pressure is conveyed to B phases Switching Power Supply 25 after being low-voltage Uba and changed.
Voltage alternate BC is opened via being conveyed to the C phases respectively after the capacitance-resistance string partial pressure in the second high pressure partial pressure arm
Powered-down source 26 and the B phases Switching Power Supply 25.Further, by the common N+1 low resistance of Rc1 to Rc (N+1) and Cc1 to CcN
The interlaced capacitance-resistance string being connected into of N number of low-voltage capacitance altogether, bleeder circuit is formed with Cbc1, Ccb1, the alternate voltages of BC are pressed
Proportion divider is taken to be changed to be conveyed into picture Switching Power Supply after low-voltage Ucb, and by voltage alternate CB proportionally
Partial pressure is conveyed to B phases Switching Power Supply 25 after being low-voltage Ubc and changed.
Wherein, it is that the A phases measure the work of converting unit 21 that the A phases Switching Power Supply 24, which is used for voltage conversion alternate AB,
Operating voltage needed for making is powered for it.It is that the B is harmonious that the B phases Switching Power Supply 25, which is used for voltage conversion alternate ABC,
Facies unit 22 works required operating voltage as its power supply.The C phases Switching Power Supply 26 is used for the alternate voltage conversions of BC
The C phases measure converting unit 23 and work required operating voltage as its power supply.
Wherein it is preferred to refer to Fig. 5 and Fig. 6, A phases Switching Power Supply 24, the B phases Switching Power Supply 25 are opened with the C phases
Powered-down source 26 includes：Input rectifying device 30, high frequency means for anti-jamming 31, PFC devices 32, DC chopped-wave device 33 and output
Straightening and filtering unit 34.The input rectifying device 30, the high frequency means for anti-jamming 31, the PFC devices 32, the direct current
Chopping device 33 and the output rectification filter device 34 are sequentially connected.Wherein, only it is with B phases Switching Power Supply 25 in the present embodiment
The explanation that example is carried out, A phases Switching Power Supply 24 are similar therewith with the principle of C phase switching devices.
In the present embodiment, as shown in Figure 5, it is preferable that the input rectifying device 30 and the high frequency means for anti-jamming
31 connections.AC signal i.e. after partial pressure is rectified into DC signal output by input rectifying device 30 and gives high frequency means for anti-jamming
31.The input rectifying device 30 can be possessing AC rectification into this function of direct current of often using on the market at present
Device, also either possesses the circuit by AC rectification into this function of direct current.In the present embodiment, it is preferable that the input
Fairing 30 can be full-wave rectifying circuit.Wherein, when the input rectifying device 30 is used for AB or CB alternate, it can be
Single-phase full-wave rectifer circuit, when alternate applied to ABC, it can be three-phase full wave rectifier circuit.Preferably, as shown in fig. 6,
The input rectifying device 30 includes：First diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4, the 5th
Diode D5 and the 6th diode D6.Wherein, the port 1 in Fig. 6, port 2, port 3 are input.
The high frequency means for anti-jamming 31 is connected with the input rectifying device 30 and the PFC devices 32 respectively.It is described
High frequency means for anti-jamming 31 is applied not only to prevent surge impact electric current, prevents the high-frequency interferencing signal of outside input from disturbing rear class
Circuit, and the straight line voltage after filtering is conveyed to the PFC devices 32, interference signal caused by late-class circuit can also be pressed down
System is got up, and prevents interference signal from returning to power network interference other equipment, and can also play a part of overvoltage protection.In the present embodiment
In, it is preferable that as shown in fig. 6, the high frequency means for anti-jamming 31 includes：The filter circuit of overvoltage crowbar 311 and first
312。
The overvoltage crowbar 311 is connected with the input rectifying device 30 and first filter circuit 312 respectively.
The overvoltage crowbar 311 can not only play a part of overvoltage and overcurrent protection, but also be used for and 312 groups of the first filter circuit
Into high frequency means for anti-jamming 31, can both prevent the interference signal input of outside influences rear class power circuit, while can also press down
Interference signal caused by late-class circuit processed inputs power network.In the present embodiment, it is preferable that the over-voltage over-current protection circuit is compound
Type PTC thermistor.
First filter circuit 312 possesses good electromagnetic compatibility (Electro Magnetic Compatibility, EMC)
Characteristic, it can prevent the high-frequency interferencing signal of outside input from disturbing the circuit of rear class, can also be by interference caused by late-class circuit
Signal suppresses to get up, and prevents interference signal from returning to power network interference other equipment.First filter circuit 312 respectively with the mistake
Voltage protection circuit 311 and the PFC devices 32 connect.Preferably, first filter circuit 312 is LC filter circuits.
The PFC devices 32 are connected with the high frequency means for anti-jamming 31 and the DC chopped-wave device 33 respectively.It is described
PFC devices 32 are used for the power factor for correcting the signal after the high frequency means for anti-jamming 31 filtering, enable more apparents
Amount is converted into active energy, and the signal after correction is conveyed into the DC chopped-wave device 33, further to improve power supply
Carrying load ability.The PFC devices 32 can be passive PFC device (passive PFC devices) or active PFC dresses
Put (active PFC devices).In the present embodiment, it is preferable that the PFC devices 32 can be passive PFC devices, for example, it may be
Circuit shown in Fig. 6, including：Second electric capacity C2, the 3rd electric capacity C3, the 7th diode D7, the 8th diode D8 and the 9th 2 pole
Pipe D9.
Wherein, the passive PFC circuit improves power factor by the way of passive Fill valley, turns more apparent energies
Active energy is changed to, improves the carrying load ability of power supply, while energy storage filtering, i.e. the second electric capacity C2 and the can also be played a part of
Three electric capacity C3 can also play a part of energy storage filtering.
The DC chopped-wave device 33 is connected with the PFC devices 32.The DC chopped-wave device 33 is used for will be through described
Signal after PFC devices 32 correct is cut as the AC signal needed for loading.In the present embodiment, as shown in Figure 6, it is preferable that institute
Stating DC chopped-wave device 33 includes：RCD circuits 331, pwm circuit 332 and transformer 333.
The RCD circuits 331 input with the pwm circuit 332, the PFC devices 32 and the transformer 333 respectively
End connection.The RCD circuits 331 are used to absorb caused backward voltage after the metal-oxide-semiconductor shut-off in the pwm circuit 332.Yu Ben
In embodiment, it is preferable that the RCD circuits 331 include：Resistance R1, the 4th electric capacity C4, the tenth TVS pipe D10 and the 11st pole
Pipe D11.One end with the 4th electric capacity C4, the tenth TVS pipe D10 anode tap are connected respectively for resistance R1 one end, in addition, resistance R1
One end be additionally operable to one end of the first primary coil T1 with the 15th port 15 and transformer 333 and be connected.Resistance R1's is another
End is connected with the 4th electric capacity the C4 other end, the tenth TVS pipe D10 cathode terminal and the 11st diode D11 cathode terminal respectively.
11st diode D11 anode tap is connected with the drain electrode end of the metal-oxide-semiconductor in pwm circuit 332, in addition, the 11st diode D11
The other end of the anode tap also with the first primary coil T1 of transformer 333 be connected.
Wherein it is preferred to which the tenth TVS pipe D10 in above-mentioned is Transient Suppression Diode, it is easy to absorb the pwm circuit
Caused backward voltage after metal-oxide-semiconductor shut-off in 332.
The pwm circuit 332 is connected with the PFC devices 32 and the input of the transformer 333 respectively.The PWM electricity
DC voltage is cut as alternating voltage by controlling the on or off of metal-oxide-semiconductor on road 332.Selection of land, the pwm circuit 332 wrap
Include：PWM controller U1, the 12nd diode D12, the 5th electric capacity C5 and the 6th electric capacity C6.The drain electrode end of the PWM controller U1
The other end with the 11st diode D11 anode tap and the first primary coil T1 of transformer 333 is connected respectively.The PWM
Controller U1 earth terminal (MOS source terminal) is connected by the 6th electric capacity C6 with its feedback end (FB), in addition, the PWM is controlled
The one end of device U1 processed earth terminal also with the second primary coil T2 of transformer 333 is connected.12nd diode D12 anode tap
It is connected with the second primary coil T2 of transformer 333 other end, the 12nd diode D12 cathode terminal and PWM controller U1
Power end (VDD) connection, in addition, the one end of the 12nd diode D12 cathode terminal also with the 5th electric capacity C5 is connected.5th electricity
The other end for holding C5 is connected by the 6th electric capacity C6 with PWM controller U1 feedback ends (FB).
Wherein, the PWM controller U1 is built-in with metal-oxide-semiconductor.The PWM controller controls metal-oxide-semiconductor to lead by producing PWM waveform
The alternating voltage for high frequency is cut DC voltage in logical and shut-off, then high-frequency ac voltage is coupled into secondary by transformer 333
Output.
Wherein, the second primary coil of transformer 333 and the 12nd diode D12 and the 5th electric capacity C5 form PWM controls
Device U1 power supply circuit.
The input of transformer 333 is connected with the pwm circuit 332 and RCD circuits 331 respectively.The transformer 333
For alternating voltage caused by pwm control circuit to be become into AC low-tension signal output.Preferably, the of the transformer 333
One primary coil T1 is connected with the RCD circuits 331 and the pwm circuit 332 respectively, the second primary coil T2 with it is described
Pwm circuit 332 connects.Wherein, the first primary coil T1 couples with the second primary coil T2, secondary coil T3.
The output rectification filter device 34 is connected with the DC chopped-wave device 33.The output rectification filter device 34 is used
Direct voltage output is rectified into the high-frequency ac voltage for exporting DC chopped-wave device 33.Preferably, as shown in fig. 6, output
Straightening and filtering unit 34 includes：13rd diode D13, resistance R2, the 7th electric capacity C7, the second inductance L2, the 8th electric capacity C8 and
9th electric capacity C9.
In order that the voltage stabilization that output rectification filter device 34 exports, it is preferable that the A phases Switching Power Supply 24, the B
Phase Switching Power Supply 25 and the C phases Switching Power Supply 26 also include：Sampling feedback device 35.The sampling feedback device 35 is distinguished
It is connected with the DC chopped-wave device 33 and the output rectification filter device 34.The sampling feedback device 35 is used for output electricity
Pressure is sampled, and sampled signal is fed back into the DC chopped-wave device 33, so that the DC chopped-wave device 33 is according to institute
State the voltage signal that sampled signal is fed back, the voltage that de-regulation is exported, so that output voltage voltage stabilizing.Preferably, such as Fig. 6
Shown, the sampling feedback device 35 includes：Second filter circuit 351, photo-coupler 352 and sampling comparison circuit 353.
Output end of second filter circuit 351 respectively with DC chopped-wave device 33 and photo-coupler 352 is connected, and is used for
The interference signal in feedback signal is filtered out, improves the precision of feedback signal, feeds back most real output voltage as far as possible.In
In this example, as shown in Figure 6, it is preferable that second filter circuit 351 is RC filter circuits, including：3rd resistor R3 and the tenth
Electric capacity C10.One end of the tenth electric capacity C10 respectively with the triode in the 6th electric capacity C6 one end and photo-coupler 352
Emitter terminal is connected, and the other end of the tenth electric capacity C10 is connected with 3rd resistor R3 one end.The 3rd resistor R3 other end
The collector terminal with the triode in the 6th electric capacity C6 other end and photo-coupler 352 is connected respectively.
The input of the photo-coupler 352 is connected with the output end of the sampling comparison circuit 353, the photo-coupler
352 output end is connected by second filter circuit 351 with the DC chopper circuit.Due to sampling comparison circuit 353
The signal gathered is not to be directly fed back to DC chopped-wave device 33, but after photo-coupler 352 carries out electrical isolation again
Feed back to DC chopped-wave device 33, therefore, during transmission, can greatly reduce its sampled signal be interfered it is general
Rate, it can feed back most real output voltage as far as possible.The security of out-put supply is improved using electrical isolation.
The output end of the sampling comparison circuit 353 is connected with the input of the photo-coupler 352, and the sampling is compared
The input of circuit 353 is connected with the output end of output rectification filter device 34.The sampling comparison circuit 353 is used for through defeated
Go out the rectification of straightening and filtering unit 34, filtered output voltage is sampled, and will sample gained signal through photo-coupler 352
The feedback end (FB) of the PWM controller fed back in DC chopped-wave device 33, so that PWM controller passes through the ratio to feedback signal
Relatively the dutycycles of PWN waveforms is adjusted, so that output voltage stabilization.In the present embodiment, as shown in Figure 6, it is preferable that described
Sampling comparison circuit 353 includes：4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8,
11 electric capacity C11 and three-terminal voltage-stabilizing diode U3.4th resistance R4 one end and the light emitting diode in photo-coupler 352
Anode tap is connected, and one end with the 5th resistance R5, the 7th resistance R7 one end are connected the 4th resistance R4 other end respectively, this
Outside, the 4th resistance R4 other end is additionally operable to be connected with the 25th port 25.The 5th resistance R5 other end is respectively with the tenth
The cathode terminal of one electric capacity C11 one end, the cathode terminal of the light emitting diode in photo-coupler 352 and three-terminal voltage-stabilizing diode U3 connects
Connect.The 11st electric capacity C11 other end by the 6th resistance R6 respectively the other end with the 7th resistance R7, the 8th resistance R8 one
End connects with three-terminal voltage-stabilizing diode U3 feedback end.Three-terminal voltage-stabilizing diode U3 anode tap and the 8th resistance R8 other end
Connection, in addition, three-terminal voltage-stabilizing diode U3 anode tap is additionally operable to be connected with the 24th port 24.
Wherein, the 7th resistance R7, the 6th resistance R6 and the 11st electric capacity C11 form RC filter circuits, can be to filtering out
Interference signal in the output voltage of sampling.
Wherein, the three-terminal voltage-stabilizing diode U3 in above-mentioned can also use other components of identical functions or similar functions
To replace, for example, comparator, is also either substituted above-mentioned using the sampling feedback circuit for realizing same principle or similar principles
In sampling feedback device 35.
Preferred embodiment of the present utility model is the foregoing is only, is not limited to the utility model, for this
For the technical staff in field, the utility model can have various modifications and variations.It is all in the spirit and principles of the utility model
Within, any modification, equivalent substitution and improvements made etc., it should be included within the scope of protection of the utility model.
Claims (10)
- A kind of 1. high pressure partial pressure arm, it is characterised in that including：RC divider and resitstance voltage divider, the resitstance voltage divider bag Include：First circuit board and the multiple first resistors being arranged on the first circuit board, the multiple first resistor are sequentially connected in series Resistance string is formed, each first resistor is the low resistance that surface scribbles insulating materials in the multiple first resistor；The RC divider includes：Second circuit board and multiple first electric capacity for being arranged on the second circuit board and more Individual second resistance, the multiple second resistance to form capacitance-resistance string with interlaced connect of the multiple first electric capacity, the multiple Each first electric capacity is low-voltage capacitance in first electric capacity, and each second resistance is low resistance in the multiple second resistance.
- 2. high pressure partial pressure arm according to claim 1, it is characterised in that per adjacent two in the multiple first resistor First resistor is connected by the copper foil being arranged on the first circuit board.
- 3. high pressure partial pressure arm according to claim 1, it is characterised in that the multiple first electric capacity is the multiple to be N number of Second resistance is N+1, and the N+1 second resistances to form capacitance-resistance string with interlaced connect of N number of first electric capacity, described The initiating terminal of capacitance-resistance string is a second resistance in the multiple second resistance, and the ending end of the capacitance-resistance string is the multiple Another second resistance in second resistance.
- 4. the high pressure partial pressure arm according to any one in claim 1-3, it is characterised in that on the first circuit board The region for being not provided with the multiple first resistor is provided with multiple first hollow-out slot bores.
- 5. the high pressure partial pressure arm according to any one in claim 1-3, it is characterised in that on the second circuit board The region for being not provided with the multiple second resistance and the multiple first electric capacity is provided with multiple second hollow-out slot bores.
- A kind of 6. high-voltage electric energy meter, it is characterised in that including：A phases input, B phases input, C phases input, A phases, which are measured, to be turned Change unit, be harmonious facies unit, C phases of B measures converting unit, A phases Switching Power Supply, B phases Switching Power Supply, C phases Switching Power Supply and two High pressure partial pressure arm as described in claim 1-5 any one, two high pressure partial pressure arms are respectively the first high pressure partial pressure arm With the second high pressure partial pressure arm；The A phases input passes through the first electricity in the first high pressure partial pressure arm with the B phases input Resistance series winding connects, and is also connect by the first capacitance-resistance series winding in the first high pressure partial pressure arm, the C phases input and the B Phase input is connect by the second resistance series winding in the second high pressure partial pressure arm, and also passes through the second high pressure partial pressure arm In the second capacitance-resistance series winding connect, to measure conversion single via the A phases are conveyed to after the first resistor string partial pressure for the voltage of A phases Member, voltage alternate AB are switched with the B phases via being conveyed to the A phases Switching Power Supply respectively after the first capacitance-resistance string partial pressure Power supply；The voltage of C phases measures converting unit, voltage alternate BC via the C phases are conveyed to after the second resistance string partial pressure Via being conveyed to the C phases Switching Power Supply and the B phases Switching Power Supply respectively after the first capacitance-resistance string partial pressure；The A phases are opened It is that the operating voltage that the A phases measure needed for converting unit work is its power supply that powered-down source, which is used for the alternate voltage conversions of AB, It is that the operating voltage that the B is harmonious needed for facies unit work is it that the B phases Switching Power Supply, which is used for the alternate voltage conversions of ABC, Power supply, it is that the C phases measure the required work of converting unit work that the C phases Switching Power Supply, which is used for voltage conversion alternate BC, Voltage is powered for it.
- 7. high-voltage electric energy meter according to claim 6, it is characterised in that the A phases Switching Power Supply, the B phases switch electricity Source and the C phases Switching Power Supply include：Input rectifying device, high frequency means for anti-jamming, PFC devices, DC chopped-wave device and Output rectification filter device, the input rectifying device, the high frequency means for anti-jamming, the PFC devices, the DC chopped-wave Device and the output rectification filter device are sequentially connected；The input rectifying device is used for the ac voltage rectifier after partial pressure into high direct voltage；The high frequency means for anti-jamming is used to filter the electromagnetic interference signal in the high direct voltage, and it is high to obtain filtered direct current Pressure；The PFC devices are used for the power factor for correcting the filtered high direct voltage, obtain calibrated high direct voltage；The DC chopped-wave device is used to cut the calibrated DC voltage for high-frequency ac voltage；The output rectification filter device is used to carry out rectification, filtering and voltage stabilizing to the high-frequency ac voltage, obtains and exports Low-voltage dc power supply needed for load.
- 8. high-voltage electric energy meter according to claim 7, it is characterised in that the DC chopped-wave device includes：RCD circuits, Pwm circuit and transformer；The RCD circuits input with the pwm circuit, the PFC devices and the transformer respectively Connection, input of the pwm circuit respectively with the PFC devices and the transformer are connected；The pwm circuit passes through control The on or off of its metal-oxide-semiconductor included, the calibrated DC voltage is cut as high-frequency ac voltage；The transformer is used for The high-frequency ac voltage is become into the output of high-frequency ac low-voltage signal, the RCD circuits are used for after absorbing the metal-oxide-semiconductor shut-off Caused backward voltage.
- 9. high-voltage electric energy meter according to claim 7, it is characterised in that the high frequency means for anti-jamming includes：Overvoltage is protected Protection circuit and the first filter circuit, the overvoltage crowbar respectively with the input rectifying device and first filter circuit Connection, first filter circuit are connected with the PFC devices.
- 10. high-voltage electric energy meter according to claim 7, it is characterised in that the A phases Switching Power Supply, the B phases switch electricity Source and the C phases Switching Power Supply also include：Sampling feedback device, the sampling feedback device fill with the DC chopped-wave respectively Put and connected with the output rectification filter device, for being sampled to the low-voltage dc power supply, and adopting for acquisition will be sampled Sample signal feeds back to the DC chopped-wave device, so that the DC chopped-wave device is exported according to the sampled signal de-regulation Voltage.
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| CN201721222555.6U CN207181482U (en) | 2017-09-22 | 2017-09-22 | A kind of high pressure partial pressure arm and high-voltage electric energy meter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107478875A (en) * | 2017-09-22 | 2017-12-15 | 武汉盛帆电子股份有限公司 | A kind of high pressure partial pressure arm and high-voltage electric energy meter |
| CN111929480A (en) * | 2020-08-28 | 2020-11-13 | 杭州海兴电力科技股份有限公司 | Electric energy meter high-voltage invasion feed network structure and electric energy meter |
-
2017
- 2017-09-22 CN CN201721222555.6U patent/CN207181482U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107478875A (en) * | 2017-09-22 | 2017-12-15 | 武汉盛帆电子股份有限公司 | A kind of high pressure partial pressure arm and high-voltage electric energy meter |
| CN111929480A (en) * | 2020-08-28 | 2020-11-13 | 杭州海兴电力科技股份有限公司 | Electric energy meter high-voltage invasion feed network structure and electric energy meter |
| CN111929480B (en) * | 2020-08-28 | 2023-05-30 | 杭州海兴电力科技股份有限公司 | Electric energy meter high-voltage invasion net feeding structure and electric energy meter |
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Denomination of utility model: A high-voltage voltage divider arm and a high-voltage energy meter Granted publication date: 20180403 Pledgee: China Postal Savings Bank Co.,Ltd. Wuhan Branch Pledgor: WUHAN SAN FRAN ELECTRONICS Corp. Registration number: Y2024980022633 |
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