CN205210138U - Plug -in components with high -pressure electric energy meter of cable accessories structure - Google Patents
Plug -in components with high -pressure electric energy meter of cable accessories structure Download PDFInfo
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- CN205210138U CN205210138U CN201520728051.6U CN201520728051U CN205210138U CN 205210138 U CN205210138 U CN 205210138U CN 201520728051 U CN201520728051 U CN 201520728051U CN 205210138 U CN205210138 U CN 205210138U
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Abstract
The utility model is suitable for a high pressure ammeter technical field provides a plug -in components with high -pressure electric energy meter of cable accessories structure, and wherein, plug -in components include first pipeline, second pipeline and third pipeline, and each pipeline inner chamber is insulating cavity structures, and the insulating cavity inboard that first pipeline cup jointed the cable is provided with current sensor, and the line is walked through the insulating cavity inboard of first pipeline to two electrodes of current sensor, is connected to electric energy chip, install voltage sensor in the insulating cavity of third pipeline, voltage sensor's an electrode passes through the insulating cavity of connection between third pipeline and the first pipeline, with the cable junction in conductor and the first pipeline, electric energy chip is used for obtaining current sensor and voltage sensor detected signal, calculates the electric energy magnitude. The embodiment of the utility model provides a through design current sensor, voltage sensor and electric energy chip in cable accessories to reach under the prerequisite that does not increase electric -energy metering box, realize the measurement of looped netowrk transformer cabinet electric energy.
Description
Technical field
The utility model belongs to technical field, particularly relates to the plug-in unit of a kind of cable accessory structure high-voltage electric energy meter.
Background technology
Electric cable fitting (CableAccessories, be abbreviated as CA) be stube cable and the product of electric line and relevant power distribution equipment, refer generally to the middle of various cable in cable line connect and terminal connection, it forms power delivery networks together with cable; Cable accessory mainly according to the characteristic of the construction of cable, can recover the performance of cable, ensure again the prolongation of cable length and the connection of terminal.
Looped network transformation cabinet is a kind of concrete use scenes of cable accessory, in order to measure electric energy service condition in looped network transformation cabinet in prior art, usually additionally can arrange an electrical energy metering tank.This can give the looped network transformation cabinet inherently taken than larger space, additionally proposes space requirement.Thus, extra resource input will be produced, and necessary operation increased when mounted, greatly will improve the power supply cost of power office.
Utility model content
The object of the utility model embodiment is to provide a kind of cable accessory to construct the plug-in unit of high-voltage electric energy meter, to solve in each line cabinet in existing power matching network looped network station the problem not having sufficient space to install electric power meter.
The utility model embodiment realizes like this, in first aspect, provide the plug-in unit of a kind of cable accessory structure high-voltage electric energy meter, described cable accessory comprises the first pipeline, second pipe and the 3rd pipeline, the inner chamber of described first pipeline, second pipe and the 3rd pipeline is dielectric chamber structure, and described second pipe is connected to described first pipeline, wherein, described second pipe and described first pipeline are socketed cable in dielectric chamber, concrete:
Be provided with current sensor inside the dielectric chamber of described first pipeline socket cable, two electrodes of described current sensor, by cabling inside the dielectric chamber of described first pipeline, are connected to electric energy computation chip;
In the dielectric chamber of described 3rd pipeline, voltage sensor is installed;
Described electric energy computation chip, for obtaining described current sensor and voltage sensor senses signal, calculates electric energy value.
Preferably, in described second pipe, the cable of socket comprises a cable terminal, then described second pipe and described first pipeline are socketed cable in dielectric chamber, are specially:
Cable terminal in the cable that the dielectric chamber of the first pipeline utilizes screw bolt and nut to be socketed and described second pipe is fixed;
Then two electrodes of described current sensor are by cabling inside the dielectric chamber of described first pipeline, are connected to electric energy computation chip, are specially:
First electrode of described current sensor is connected with described bolt, and the second Electrode connection of described current sensor is fixed on the conducting metal on dielectric chamber, based on described cable terminal and conducting metal, realizes the connection of current sensor and electric energy computation chip.
Preferably, described 3rd pipeline and described second pipe are parallel to each other, and are connected on described first pipeline, concrete:
Described second pipe is near the rear plug of described first pipeline, or described 3rd pipeline is near the rear plug of described first pipeline.
Preferably, the dielectric chamber of the first electrode by setting up between described 3rd pipeline and described first pipeline of described voltage sensor, utilizes conductor to be connected with described first ducted cable; Second electrode of described voltage sensor is used for ground connection, or, be connected on an other phase cable with conductor.
Preferably, described electric energy computation chip (14) is placed in the dielectric chamber of described the first pipeline (11), or, be placed in the dielectric chamber of the 3rd described pipeline (13), also can be placed in the dielectric chamber of described second pipe (12).
Preferably, described plug-in unit also comprises high voltage fuse, concrete: described high voltage fuse is arranged on the 3rd described pipe interior, connects with described voltage sensor.
Preferably, described first pipeline is made up of with the first pipeline back segment being connected the 3rd pipeline the first pipeline leading portion connecting second pipe, and described first pipeline leading portion and second pipe back segment are specially can pulling/inserting structure.
Preferably, described conducting metal is specially and is fixed on inside the first pipeline leading portion dielectric chamber and inside the first rear end of pipeline dielectric chamber, two circle beckets of junction are formed.
Preferably, described voltage sensor is specially capacitive battery pressure sensor.
Preferably, described current sensor replaces with current sensor by the first ducted mode that is arranged on and is arranged on mode in second pipe.
In second aspect, the utility model is implemented to additionally provide a kind of high-voltage electric energy meter plug-in unit based on cable accessory, and described plug-in unit comprises the first pipeline and second pipe, and the inner chamber of described first pipeline and second pipe is dielectric chamber structure, described second pipe connects described first pipeline, concrete:
Described plug-in unit also comprises current sensor, and described current sensor, for embedding in the insulated cavity of cable accessory, is socketed the cable in described insulated cavity; Two electrodes of described current sensor, by cabling inside the dielectric chamber of described first pipeline, are connected to electric energy computation chip;
Be provided with voltage sensor in the dielectric chamber of described second pipe, the dielectric chamber of the first electrode by connecting between described second pipe and described first pipeline of described voltage sensor, is connected with described first ducted cable with conductor; The second electrode then ground connection of described voltage sensor, or, be connected on an other phase cable with conductor;
Described electric energy computation chip is arranged in the insulated cavity of described second pipe, for obtaining described current sensor and voltage sensor senses signal, calculates electric energy value.
Preferably, the dielectric chamber of the first electrode by setting up between described second pipe and described first pipeline of described voltage sensor, utilizes conductor to be connected with the cable in described cable accessory; Second electrode of described voltage sensor is used for ground connection, or, be connected on an other phase cable with conductor.
Preferably, described electric energy computation chip is placed in the dielectric chamber of the first described pipeline, or, be placed in the dielectric chamber of described second pipe.
Preferably, described plug-in unit also comprises high voltage fuse, concrete: it is inner that described high voltage fuse is arranged on described second pipe, connects with described voltage sensor.
In the third aspect, the utility model embodiment still provides the using method of a kind of cable accessory structure high-voltage electric energy meter, comprise as first aspect propose with cable accessory structure high-voltage electric energy meter plug-in unit, when described plug-in unit is used in three-phase electricity two elements metering method, described three-phase electricity comprises A, B and C three-phase, wherein, use described plug-in unit for the cable accessory A connecting A phase with the cable accessory C for being connected C phase, concrete:
First electrode of the voltage sensor in cable accessory A, by the dielectric chamber connected between the 3rd pipeline of cable accessory A and the first pipeline, is connected with described first ducted A phase cable with conductor; Second Electrode connection of described voltage sensor is on the high-pressure conductor of B phase;
First electrode of the voltage sensor in cable accessory C, by the dielectric chamber connected between the 3rd pipeline of cable accessory C and the first pipeline, is connected with described first ducted C phase cable with conductor; Second Electrode connection of described voltage sensor is on the high-pressure conductor of B phase;
Installation high-voltage fuse in B phase cable accessory.
In fourth aspect, the utility model embodiment still provides the using method of a kind of cable accessory structure high-voltage electric energy meter, comprise as first aspect propose with cable accessory structure high-voltage electric energy meter plug-in unit, when described plug-in unit is used in three-phase electricity three element metering method, described three-phase electricity comprises A, B and C three-phase, concrete:
First electrode of the voltage sensor in cable accessory A, by the dielectric chamber connected between the 3rd pipeline of cable accessory A and the first pipeline, is connected with described first ducted A phase cable with conductor; Second electrode of the voltage sensor in cable accessory A receives neutral point through high voltage fuse;
First electrode of the voltage sensor in cable accessory B, by the dielectric chamber connected between the 3rd pipeline of cable accessory B and the first pipeline, is connected with described first ducted B phase cable with conductor; Second electrode of the voltage sensor in cable accessory B receives neutral point through high voltage fuse;
First electrode of the voltage sensor in cable accessory C, by the dielectric chamber connected between the 3rd pipeline of cable accessory C and the first pipeline, is connected with described first ducted C phase cable with conductor; Second electrode of the voltage sensor in cable accessory C receives neutral point through high voltage fuse; Wherein, described central point is used for ground connection or unsettled.
In the 5th, the utility model embodiment still provides the method that a kind of cable accessory structure high-voltage electric energy meter calculates global error, the high-voltage electric energy meter of described cable accessory structure is specifically used in three-phase electricity environment, wherein, the power supply branch of three-phase electricity connects error criterion device, and described error criterion device is the electric power meter of known universe error; Wherein, described error criterion device comprises current sensor, voltage sensor and electric energy computation chip, and described current sensor, voltage sensor and electric energy computation chip are installed in the space of shielding extraneous electromagnetic interference;
The total electric energy of input of described three-phase electricity is calculated by described high-voltage electric energy meter; The total electric energy of output of described three-phase electricity is calculated by the electric power meter of three-phase electricity in each power supply branch;
Global error measuring apparatus obtains energy value that described high-voltage electric energy meter calculates, the energy value of electric power meter in each branch and the energy value of described standard error device;
Described global error measuring apparatus equals according to the total electric energy of input the criterion exporting total electric energy, calculates high-voltage electric energy meter and electric power meter global error separately.
Preferably, in three-phase electricity two elements metering method, the connected mode of described high-voltage electric energy meter is described by fourth aspect, then the total electric energy of the input of described three-phase electricity is calculated by described high-voltage electric energy meter, is specially:
Electric energy computation chip in cable accessory A calculates the energy value between A, B phase line, electric energy computation chip in cable accessory C calculates the energy value between B, C phase line, described energy value is concentrated to pass to the electric energy computation chip of described cable accessory A or the electric energy computation chip of described cable accessory C, and is calculated the total electric energy of input of described three-phase electricity by corresponding electric energy computation chip.
Preferably, in three-phase electricity three element metering method, the connected mode of described high-voltage electric energy meter is described in the 5th aspect, then the total electric energy of the input of described three-phase electricity is calculated by described high-voltage electric energy meter, is specially:
Electric energy computation chip in described cable accessory A calculates the energy value of A phase line, electric energy computation chip in described cable accessory B calculates the energy value of B phase line, electric energy computation chip in described cable accessory C calculates the energy value of C phase line, described energy value is passed to the electric energy computation chip of the electric energy computation chip of described cable accessory A, the electric energy metrical core of cable accessory A or described cable accessory C by concentrating, and is calculated the total electric energy of input of described three-phase electricity by corresponding electric energy computation chip.
Preferably, described calculating high-voltage electric energy meter and electric power meter global error separately, also comprise the respective global error global error of described high-voltage electric energy meter being split as cable accessory A, cable accessory B and/or cable accessory C and analyze, concrete:
The respective global error of the cable accessory A calculated, cable accessory B and/or cable accessory C is compared with predetermined threshold value, if the global error value of one of them or several cable accessory exceedes described predetermined threshold value, then confirm that this cable accessory needs to replace.
Preferably, describedly equal according to the total electric energy of input the criterion exporting total electric energy, calculate high-voltage electric energy meter and electric power meter global error separately, specifically comprise:
By in the fixed time by the energy data of described high voltage electric energy table record and the energy data by electric power meter record in described each branch, in conjunction with the error amount variable under each leisure described load current section and set system energy consumption variable, structure energy balance equation, the energy data reading N subsystem can form N number of equation and form system of equations; Described energy equation comprises the error amount variable of each electric power meter under each load current section;
Global error measuring apparatus obtains each electric power meter energy data in respective negative charged current section stored;
And by the load current segmentation of described energy data according to its correspondence, substitute into the coefficient as corresponding error amount variable in energy equation, equationof structure formula and system of equations, the known error of use error standard, solve described energy equation, obtain the error amount of each electric power meter in each load level.
The beneficial effect of the plug-in unit of a kind of cable accessory structure high-voltage electric energy meter that the utility model embodiment provides comprises: the utility model embodiment is by design current sensor, voltage sensor and electric energy computation chip in cable accessory, thus reach under the prerequisite not increasing electrical energy metering tank, realize the metering of electric energy in looped network transformation cabinet or transformer station.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of cable accessory in the prior art that provides of the utility model embodiment;
Fig. 2 is the dongle configuration schematic diagram of a kind of cable accessory structure high-voltage electric energy meter that the utility model embodiment provides;
Fig. 3 is the dongle configuration schematic diagram of a kind of cable accessory structure high-voltage electric energy meter that the utility model embodiment provides;
Fig. 4 is the dongle configuration schematic diagram of a kind of cable accessory structure high-voltage electric energy meter that the utility model embodiment provides;
Fig. 5 is the dongle configuration schematic diagram of a kind of cable accessory structure high-voltage electric energy meter that the utility model embodiment provides;
Fig. 6 is a kind of dongle configuration schematic diagram based on cable accessory structure high-voltage electric energy meter that the utility model embodiment provides;
Fig. 7 is a kind of dongle configuration schematic diagram using high-voltage electric energy meter on cable accessory that the utility model embodiment provides;
Fig. 8 is a kind of voltage sensor structural representation that the utility model embodiment provides;
Fig. 9 is a kind of voltage sensor structural representation that the utility model embodiment provides;
Figure 10 be a kind of cable accessory structure high-voltage electric energy meter that the utility model embodiment provides be used in three-phase electricity measure in structural representation.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
In order to technical scheme described in the utility model is described, be described below by specific embodiment.
As shown in Figure 1, a kind of cable accessory used in the prior art provided for the utility model embodiment.Comprising the first pipeline 11 and second pipe 12, two inner cavity of pipe be insulating material form, ensure that high-tension cable and external insulation, outer wall be conductive material form, ensure that in cable accessory and form equally distributed electric field, avoid the generation of voltage breakdown.
Cable terminal 23 in the cable that the dielectric chamber of the first pipeline 11 utilizes bolt 21 and nut 22 to be socketed and described second pipe 12 is fixed, thus realizes in small space, complete the object turned back in cable transporting direction.
Embodiment one
As shown in Figure 2, for the plug-in unit of a kind of cable accessory structure high-voltage electric energy meter that the utility model embodiment provides, described plug-in unit comprises the first pipeline 11, second pipe 12 and the 3rd pipeline 13, the inner chamber of described first pipeline 11, second pipe 12 and the 3rd pipeline 13 is dielectric chamber structure, described second pipe 12 is connected to described first pipeline 11, wherein, described second pipe 12 and described first pipeline 11 are socketed cable in dielectric chamber, concrete:
Be provided with current sensor 14 inside the dielectric chamber that described first pipeline 11 is socketed cable, two electrodes of described current sensor 14, by cabling inside the dielectric chamber of described first pipeline 11, are connected to electric energy computation chip 17.
Wherein, cabling inside the described dielectric chamber passing through the first pipeline 11 can be specifically at dielectric chamber inside surface cabling, also can be the mode cabling by embedding or incorporate dielectric chamber inside.
Wherein, current sensor 14 of the present utility model is fixed on the inner side of described first pipeline 11, namely the detection of cable current is achieved, can ensure that again its current value detected can not be subject to outside electromagnetic interference and produce fluctuation because outside electromagnetic interference shield by the dielectric chamber of the first pipeline 11.
In the dielectric chamber of described 3rd pipeline 13, voltage sensor 15 is installed.
Wherein, the second electrode specifically ground connection of described voltage sensor 15, or, be connected on an other phase cable with conductor, the high-voltage electric energy meter use-pattern specifically proposed by the utility model determines, such as: when described high-voltage electric energy meter is used in during three-phase electricity measures, when measuring the voltage between two-phase cable (using three-phase electricity two element metering method), then described conductor is adopted to be connected to connected mode on an other phase cable; When described high-voltage electric energy meter be used in three-phase electricity measure in (namely use three-phase electricity three element metering method), when measuring single-phase cable voltage over the ground, then adopt the mode of described second electrode specifically ground connection.
Described electric energy computation chip 17, for obtaining described current sensor 14 and voltage sensor 15 detection signal, calculates electric energy value.
The utility model embodiment by design current sensor, voltage sensor and electric energy computation chip in cable accessory, thus reaches under the prerequisite not increasing electrical energy metering tank, realizes the metering of electric energy in looped network transformation cabinet or transformer station.In addition, also there is a kind of beneficial effect in the utility model embodiment, namely because current sensor, voltage sensor and electric energy computation chip are all installed in a through dielectric chamber, therefore, extraneous electromagnetic interference (EMI) can be shielded, make the error of whole high pressure ammeter become the object that can survey, described in each embodiment of the utility model, the error of whole high pressure ammeter is also called global error for short.
Wherein, described global error is the sum of the deviations caused by electric energy computation chip and accessory circuit, current transformer and the accuracy of voltage transformer (VT) three self-metering, also comprises the sum of the deviations caused by other influences factor; The sum of the deviations that other influences factor causes comprises: the error that the electromagnetic environment residing for three causes itself affect, and is disturbed the error caused each other by three.Wherein, the electromagnetic environment residing for described three produces in energising situation primarily of the cable in dielectric chamber.
When concrete enforcement the utility model embodiment, there is a kind of preferred implementation, wherein, in described second pipe 12, the cable of socket comprises a cable terminal, then described second pipe 12 and described first pipeline 11 are socketed cable in dielectric chamber, are specially:
Cable terminal 23 in the cable that the dielectric chamber of the first pipeline 11 utilizes bolt 21 and nut 22 to be socketed and described second pipe 12 is fixed;
Then two electrodes of described current sensor 14 are by cabling inside the dielectric chamber of described first pipeline 11, are connected to electric energy computation chip 17, are specially:
First electrode of described current sensor 14 is connected with described bolt 21, second Electrode connection of described current sensor 14 is fixed on the conducting metal 24 on dielectric chamber, based on described cable terminal 23 and conducting metal 24, realize the connection of current sensor 14 and electric energy computation chip 17.
When concrete enforcement the utility model embodiment, there is a kind of preferred implementation, wherein, the first electrode of described voltage sensor 15, by the dielectric chamber set up between described 3rd pipeline 13 and described first pipeline 11, utilizes conductor 16 to be connected with the cable in described first pipeline 11; Second electrode of described voltage sensor 15 is used for ground connection, or, be connected on an other phase cable with conductor.
When concrete enforcement the utility model embodiment, there is a kind of preferred implementation, wherein, described electric energy computation chip 14 is placed in the dielectric chamber of the first described pipeline 11, or, be placed in the dielectric chamber of the 3rd described pipeline 13, or, be placed in the dielectric chamber of described second pipe 12.Described electric energy computation chip 14 communication module is in the current potential identical with described power cable.
When concrete enforcement the utility model embodiment, there is a kind of preferred implementation, wherein, described plug-in unit also comprises high voltage fuse, concrete: it is inner that described high voltage fuse is arranged on the 3rd described pipeline 13, connects with described voltage sensor 15.When voltage sensor 15 because when puncturing or damage, described high voltage fuse blows, avoid described high-tension cable generation earth fault or phase fault occurs.
When concrete enforcement the utility model embodiment, there is a kind of preferred implementation, wherein, described 3rd pipeline 13 and described second pipe 12 are parallel to each other, and are connected on described first pipeline 11, concrete:
Described second pipe 12 is near the rear plug of described first pipeline 11, or described 3rd pipeline 13 is near the rear plug of described first pipeline 11.
As shown in Fig. 2,3,4 or 5, the mode of this layout first pipeline 11, second pipe 12 and the 3rd pipeline 13, compare joint space-efficient, and cable and voltage sensor can be kept apart as much as possible by second pipe 12 and the 3rd pipeline 13, the internal electrical magnetic interference affecting global error to be reduced to minimum.
Present embodiments provide the implementation of plug after two kinds, a kind of is as shown in Figure 2 open, the rear plug of this mode adopts the cable accessory interface mode of compound electric network mark standard, if make follow-uply to have increased electrical part newly, can be connected to by interface as shown in Figure 2 in plug-in unit of the present utility model.When not using at ordinary times, this interface can be lived by electro-insulating rubber cap seal.Also having a kind of is as shown in Figure 3 enclosed, and its benefit ensure that rear plug there will be no other electrical part to increase, thus electric energy computation chip can be arranged on the rear plug place of the first pipeline.
When concrete enforcement the utility model embodiment, there is a kind of preferred implementation, wherein, described first pipeline 11 is made up of with the first pipeline 11 back segment being connected the 3rd pipeline 13 the first pipeline 11 leading portion connecting second pipe 12, and described first pipeline 11 leading portion and second pipe 12 back segment are specially can pulling/inserting structure.This can pulling/inserting structure referring to figs. 2 and 3.
Describedly can be conducive to the maintenance of equipment and the replacement of plug-in unit by pulling/inserting structure, such as: when confirming that electric energy computation chip damages, for structure as shown in Figure 2, the cable accessory be made up of the 3rd pipeline 13 and the first pipeline back segment can be replaced, and retain the cable accessory be made up of the first pipeline leading portion and second pipe 12.Thus maintenance cost can be reduced further, also can increase sell goods pattern, namely sell in the mode of accessory.
The utility model embodiment except protect above-mentioned can except pulling/inserting structure; also the structure of integral type is protected; concrete reference diagram 4; wherein; first pipeline 11, second pipe 12 and the 3rd pipeline 13 are integrated compacting and form; other functional part with reference to the embodiment of corresponding diagram 2 and Fig. 3, can not repeat at this one by one.
When concrete enforcement the utility model embodiment, there is a kind of preferred implementation, wherein, described conducting metal 24 is specially and is fixed on inside the first pipeline 11 leading portion dielectric chamber and inside the first pipeline 11 rear end dielectric chamber, two circle beckets of junction are formed.Described two circle beckets can be adopt attaching type, also can adopt inter-embedding type, between them is fixedly by bolt 21 between the first pipeline 11 and the 3rd pipeline 13 and nut 22 is fixing realizes.The mode of described becket can ensure conductance property, and in practical implementations, also can adopt mode of sheet metal, column interfix etc., all belongs to protection domain of the present utility model.
Concrete implement the utility model embodiment time, there is a kind of preferred implementation, wherein, described current sensor 14 replaces with current sensor 14 by the mode be arranged in the first pipeline 11 and is arranged on mode in second pipe 12.
The utility model embodiment by design current sensor, voltage sensor and electric energy computation chip in cable accessory, thus reaches under the prerequisite not increasing electrical energy metering tank, realizes the metering of electric energy in looped network transformation cabinet or transformer station.
Embodiment two
In embodiment one, propose the plug-in unit of a kind of cable accessory structure high-voltage electric energy meter, the object of this embodiment proposes a kind of alternative existing cable annex, and realize the plug-in unit of high voltage electric energy table function.But more reality scene demand is then installed existing cable annex as shown in Figure 1 in power transformation box, if now the function of high-voltage electric energy meter will be realized in this mounted cable accessory, then need the plug-in unit that the present embodiment two proposes.As shown in Figures 6 and 7, the present embodiment proposes a kind of high-voltage electric energy meter plug-in unit based on cable accessory, concrete:
Described plug-in unit comprises the first pipeline 11 and second pipe 12, and the inner chamber of described first pipeline 11 and second pipe 12 is dielectric chamber structure, and described second pipe 12 connects described first pipeline 11, concrete:
Described plug-in unit also comprises current sensor 14, and described current sensor 1, for embedding in the insulated cavity of cable accessory, is socketed the cable in described insulated cavity; When described plug-in unit is arranged on cable accessory, two electrodes of described current sensor 14, by cabling inside the dielectric chamber of described first pipeline 11, are connected to electric energy computation chip 17;
In the dielectric chamber of described second pipe 12, voltage sensor 15 is installed, first electrode of described voltage sensor 15, by the dielectric chamber connected between described second pipe 12 and described first pipeline 11, is connected with described first ducted cable with conductor 16; The second electrode then ground connection of described voltage sensor 15, or, be connected on an other phase cable with conductor;
Described electric energy computation chip 17 is arranged in the insulated cavity of described second pipe 12, for obtaining described current sensor 14 and voltage sensor 15 detection signal, calculates electric energy value.
The the first ducted current sensor be fixed in script embodiment one is as shown in Figure 2 stripped out by the present embodiment, and to embed the mode of existing cable annex insulated cavity, completes the fixing of current sensor.Improve the compatibility with existing cable annex, provide the implementation of the high-voltage electric energy meter that a kind of the utility model of can upgrading on existing cable annex basis proposes.
It is emphasized that, the major scheme of the present embodiment do not adopt as in embodiment one adopt, the mode in cable that the one-level of current sensor is directly connected to is (in embodiment one, the first electrode being implemented as described current sensor is connected with described bolt, second Electrode connection of described current sensor is fixed on the conducting metal on dielectric chamber), but the two poles of the earth of current sensor are directly connected on the A/D modular converter of electric energy computation chip.The difference of two kinds of modes is just that current sensor in embodiment one is owing to being directly connected to cable, and its electromotive force is driven high, and therefore, electric energy computation chip, when connecting voltage sensor, also needs the high potential position connecting corresponding voltage sensor.And in the present embodiment, because current sensor does not directly contact with cable, therefore, the electromotive force of current sensor is not high, corresponding electric energy computation chip, when connecting voltage sensor, needs the low potential position connecting corresponding voltage sensor.The high-voltage electric energy meter that above-mentioned two kinds of modes are proposed in embodiments is all feasible, mutually interchangeable.
When concrete enforcement the utility model embodiment, there is a kind of preferred implementation, wherein, the first electrode of described voltage sensor 15, by the dielectric chamber set up between described second pipe 12 and described first pipeline 11, utilizes conductor 16 to be connected with the cable in described cable accessory; Second electrode of described voltage sensor 15 is used for ground connection, or, be connected on an other phase cable with conductor.
When concrete enforcement the utility model embodiment, there is a kind of preferred implementation, wherein, described electric energy computation chip 14 is placed in the dielectric chamber of the first described pipeline 11, or, be placed in the dielectric chamber of described second pipe 12.
When concrete enforcement the utility model embodiment, there is a kind of preferred implementation, wherein, described plug-in unit also comprises high voltage fuse, concrete: it is inner that described high voltage fuse is arranged on described second pipe 12, connects with described voltage sensor 15.
Embodiment three
The voltage sensor 15 of the present embodiment involved by each embodiment of the utility model proposes a kind of concrete implementation, and wherein, described voltage sensor 15 is specially capacitive battery pressure sensor, resistive voltage sensor or holds the hybrid sensor of resistance.As shown in Figure 8 and Figure 9, be the structural representation of a kind of capacitive battery pressure sensor that the utility model embodiment provides, comprise high-voltage connection terminal 151, semi-conductive layer 152, tubular capacitor sensor 153, low pressure extraction signal wire 154 and ground wire 155.Those skilled in the art are known, the outlet position of the low pressure extraction signal wire 154 shown in Fig. 8, Fig. 9 and ground wire 155 and outlet method are only the one in multiple situation, can also from tubular capacitor sensor 153 side or semi-conductive layer 152 top surface outgoing in specific implementation.The ground wire 155 described in the present embodiment is applicable in the three-phase electricity three element metering method below described in embodiment three; And when applying in embodiment two below, described ground wire 155 as another Wiring port of tubular capacitor sensor 153, then needs to connect (such as: connect on B phase cable) on the high-pressure conductor of B phase power transmission line.
The present embodiment in figs. 8 and 9, when the plug-in unit of corresponding cable accessory structure high-voltage electric energy meter is used in three-phase electricity two elements metering method, described ground wire 155 is used for connecting a certain item cable in threephase cable, concrete with reference to three-phase electricity two elements metering method, does not repeat them here.
Embodiment four
The utility model embodiment still provides the using method of a kind of cable accessory structure high-voltage electric energy meter, comprise as embodiment one propose with cable accessory structure high-voltage electric energy meter plug-in unit, when described plug-in unit is used in three-phase electricity two elements metering method, as shown in Figure 10, described three-phase electricity comprises A, B and C three-phase, wherein, for connect A phase with cable accessory structure high-voltage electric energy meter plug-in unit (be called as cable accessory A in the present embodiment, because it has electric energy metrical function, also can be described as high voltage electric energy Table A) with for be connected C phase with cable accessory structure high-voltage electric energy meter plug-in unit (be called as cable accessory C in the present embodiment, because it has electric energy metrical function, also can be described as high-voltage electric energy meter C) use plug-in unit described in described embodiment 1, concrete:
First electrode of the voltage sensor in cable accessory A, by the dielectric chamber connected between the 3rd pipeline of cable accessory A and the first pipeline, is connected with described first ducted A phase cable with conductor; Second Electrode connection of described voltage sensor is on the high-pressure conductor of B phase.
In Fig. 10, concrete, the second electrode of the voltage sensor in cable accessory A is connected on the high-pressure conductor of B phase by wire 156.
First electrode of the voltage sensor in cable accessory C, by the dielectric chamber connected between the 3rd pipeline of cable accessory C and the first pipeline, is connected with described first ducted C phase cable with conductor; Second Electrode connection of described voltage sensor is on the high-pressure conductor of B phase;
In Fig. 10, concrete, the second electrode of the voltage sensor in cable accessory C is connected on the high-pressure conductor of B phase by wire 157.
Installation high-voltage fuse in B phase cable accessory.
Wherein, the magnitude of voltage that the parameter value of described high voltage fuse is transmitted by described triple-phase line determined.Such as: the magnitude of voltage of transmission is specially 10kV, then the high voltage fuse value of described high pressure ammeter B is 10kV.In preferred scheme, described cable accessory A, cable accessory B.
Embodiment five
The utility model embodiment still provides the using method of a kind of cable accessory structure high-voltage electric energy meter, comprise as first aspect propose with cable accessory structure high-voltage electric energy meter plug-in unit, when described plug-in unit is used in three-phase electricity three element metering method, described three-phase electricity comprises A, B and C three-phase, concrete:
First electrode of the voltage sensor in cable accessory A, by the dielectric chamber connected between the 3rd pipeline of cable accessory A and the first pipeline, is connected with described first ducted A phase cable with conductor; Second electrode of the voltage sensor in cable accessory A receives neutral point through high voltage fuse;
First electrode of the voltage sensor in cable accessory B passes through the dielectric chamber connected between the 3rd pipeline of cable accessory B and the first pipeline 11, is connected with described first ducted B phase cable with conductor; Second electrode of the voltage sensor in cable accessory B receives neutral point through high voltage fuse;
First electrode of the voltage sensor in cable accessory C, by the dielectric chamber connected between the 3rd pipeline of cable accessory C and the first pipeline, is connected with described first ducted C phase cable with conductor; Second electrode of the voltage sensor in cable accessory C receives neutral point through high voltage fuse; Wherein, described central point is used for ground connection or unsettled.
Described neutral point is ground connection or unsettled in instantiation, has the opering characteristic of electric apparatus of instantiation to determine.
Embodiment six
The utility model embodiment still provides the method that a kind of cable accessory structure high-voltage electric energy meter calculates global error, the high-voltage electric energy meter of described cable accessory structure is specifically used in three-phase electricity environment, wherein, the power supply branch of three-phase electricity connects error criterion device, and described error criterion device is the electric power meter of known universe error; Wherein, described error criterion device comprises current sensor, voltage sensor and electric energy computation chip, and described current sensor, voltage sensor and electric energy computation chip are installed in the space of shielding extraneous electromagnetic interference;
The total electric energy of input of described three-phase electricity is calculated by described high-voltage electric energy meter; The total electric energy of output of described three-phase electricity is calculated by the electric power meter of three-phase electricity in each power supply branch;
Global error measuring apparatus obtains energy value that described high-voltage electric energy meter calculates, the energy value of electric power meter in each branch and the energy value of described standard error device;
Described global error measuring apparatus equals according to the total electric energy of input the criterion exporting total electric energy, calculates high-voltage electric energy meter and electric power meter global error separately.
The present embodiment make use of the objective standard meeting calculating global error with the high-voltage electric energy meter self of cable accessory structure that the utility model proposes, namely require that each module participating in electric energy metrical can shield extraneous uncontrollable electromagnetic interference (EMI), thus by current sensor, voltage sensor, electric energy computation chip, or even the electromagnetic interference (EMI) that cable accessory inside cable causes, integrally computable amount, and use this global error to pass judgment on the accuracy rate of this high-voltage electric energy meter
When concrete enforcement the utility model embodiment, there is a kind of preferred implementation, wherein, in three-phase electricity two elements metering method, the connected mode of described high-voltage electric energy meter is described in embodiment two, then the total electric energy of the input of described three-phase electricity is calculated by described high-voltage electric energy meter, is specially:
Electric energy computation chip in cable accessory A calculates the energy value between A, B phase line, electric energy computation chip in cable accessory C calculates the energy value between B, C phase line, described energy value is concentrated to pass to the electric energy computation chip of described cable accessory A or the electric energy computation chip of described cable accessory C, and is calculated the total electric energy of input of described three-phase electricity by corresponding electric energy computation chip.
When concrete enforcement the utility model embodiment, there is a kind of preferred implementation, wherein, in three-phase electricity three element metering method, the connected mode of described high-voltage electric energy meter is described by embodiment three, then the total electric energy of the input of described three-phase electricity is calculated by described high-voltage electric energy meter, is specially:
Electric energy computation chip in described cable accessory A calculates the energy value of A phase line, electric energy computation chip in described cable accessory B calculates the energy value of B phase line, electric energy computation chip in described cable accessory C calculates the energy value of C phase line, described energy value is passed to the electric energy computation chip of the electric energy computation chip of described cable accessory A, the electric energy metrical core of cable accessory A or described cable accessory C by concentrating, and is calculated the total electric energy of input of described three-phase electricity by corresponding electric energy computation chip.
When concrete enforcement the utility model embodiment, there is a kind of preferred implementation, wherein, described calculating high-voltage electric energy meter and electric power meter global error separately, also comprise the respective global error global error of described high-voltage electric energy meter being split as cable accessory A, cable accessory B and/or cable accessory C to analyze, concrete:
The respective global error of the cable accessory A calculated, cable accessory B and/or cable accessory C is compared with predetermined threshold value, if the global error value of one of them or several cable accessory exceedes described predetermined threshold value, then confirm that this cable accessory needs to replace.
Concrete implement the utility model embodiment time, there is a kind of preferred implementation, wherein, describedly equal according to the total electric energy of input the criterion exporting total electric energy, calculate high-voltage electric energy meter and electric power meter global error separately, specifically comprise:
By in the fixed time by the energy data of described high voltage electric energy table record and the energy data by electric power meter record in described each branch, in conjunction with the error amount variable under each leisure described load current section and set system energy consumption variable, structure energy balance equation, the energy data reading N subsystem can form N number of equation and form system of equations; Described energy equation comprises the error amount variable of each electric power meter under each load current section;
Global error measuring apparatus obtains each electric power meter energy data in respective negative charged current section stored;
And by the load current segmentation of described energy data according to its correspondence, substitute into the coefficient as corresponding error amount variable in energy equation, equationof structure formula and system of equations, the known error of use error standard, solve described energy equation, obtain the error amount of each electric power meter in each load level.
In each embodiment of the utility model, exist in a kind of preferred implementation, the electric energy computation chip of described plug-in unit has the computing function of global error measuring apparatus simultaneously.Its specific implementation function, as described in embodiment six, does not repeat one by one at this.
Those of ordinary skill in the art it is also understood that, the all or part of step realized in above-described embodiment method is that the hardware that can carry out instruction relevant by program has come, described program can be stored in a computer read/write memory medium, described storage medium, comprises ROM/RAM, disk, CD etc.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (9)
1. the plug-in unit with cable accessory structure high-voltage electric energy meter, it is characterized in that, described plug-in unit comprises the first pipeline (11), second pipe (12) and the 3rd pipeline (13), the inner chamber of described first pipeline (11), second pipe (12) and the 3rd pipeline (13) is dielectric chamber structure, described second pipe (12) is connected to described first pipeline (11), wherein, described second pipe (12) and described first pipeline (11) are socketed cable in dielectric chamber, concrete:
Current sensor (14) is provided with inside the dielectric chamber of described first pipeline (11) socket cable, two electrodes of described current sensor (14), by cabling inside the dielectric chamber of described first pipeline (11), are connected to electric energy computation chip (17);
In the dielectric chamber of described 3rd pipeline (13), voltage sensor (15) is installed;
Described electric energy computation chip (17), for obtaining described current sensor (14) and voltage sensor (15) detection signal, calculates electric energy value.
2. the plug-in unit of cable accessory structure high-voltage electric energy meter according to claim 1, it is characterized in that, in described second pipe (12), the cable of socket comprises a cable terminal, then described second pipe (12) and described first pipeline (11) are socketed cable in dielectric chamber, are specially:
Cable terminal (23) in the cable that the dielectric chamber of the first pipeline (11) utilizes bolt (21) and nut (22) to be socketed and described second pipe (12) is fixed;
Then two electrodes of described current sensor (14) are by cabling inside the dielectric chamber of described first pipeline (11), are connected to electric energy computation chip, are specially:
First electrode of described current sensor (14) is connected with described bolt, second Electrode connection of described current sensor (14) is fixed on the conducting metal (24) on dielectric chamber, based on described cable terminal (23) and conducting metal (24), realize the connection of current sensor (14) and electric energy computation chip.
3. the plug-in unit of cable accessory structure high-voltage electric energy meter according to claim 1, it is characterized in that, first electrode of described voltage sensor (15), by the dielectric chamber set up between described 3rd pipeline (13) and described first pipeline (11), utilizes conductor (16) to be connected with the cable in described first pipeline (11); Second electrode of described voltage sensor (15) is used for ground connection, or, be connected on an other phase cable with conductor.
4. the plug-in unit of cable accessory structure high-voltage electric energy meter according to claim 1, it is characterized in that, described electric energy computation chip (17) is placed in the dielectric chamber of described the first pipeline (11), or, be placed in the dielectric chamber of the 3rd described pipeline (13), or, be placed in the dielectric chamber of described second pipe (12).
5. the plug-in unit of cable accessory structure high-voltage electric energy meter according to claim 1, it is characterized in that, described plug-in unit also comprises high voltage fuse, concrete: it is inner that described high voltage fuse is arranged on the 3rd described pipeline (13), connects with described voltage sensor (15).
6. the high-voltage electric energy meter plug-in unit based on cable accessory, it is characterized in that, described plug-in unit comprises the first pipeline (11) and second pipe (12), the inner chamber of described first pipeline (11) and second pipe (12) is dielectric chamber structure, described second pipe (12) connects described first pipeline (11), concrete:
Described plug-in unit also comprises current sensor (14), and described current sensor (14), for embedding in the insulated cavity of cable accessory, is socketed the cable in described insulated cavity; When described plug-in unit is arranged on cable accessory, two electrodes of described current sensor (14), by cabling inside the dielectric chamber of described first pipeline (11), are connected to electric energy computation chip (17);
Voltage sensor (15) is installed in the dielectric chamber of described second pipe (12), first electrode of described voltage sensor (15), by the dielectric chamber connected between described second pipe (12) and described first pipeline (11), is connected with the cable in described first pipeline (11) with conductor (16); The second electrode then ground connection of described voltage sensor (15), or, be connected on an other phase cable with conductor;
Described electric energy computation chip (17) is arranged in the insulated cavity of described second pipe (12), for obtaining described current sensor (14) and voltage sensor (15) detection signal, calculates electric energy value.
7. the high-voltage electric energy meter plug-in unit based on cable accessory according to claim 6, it is characterized in that, first electrode of described voltage sensor (15), by the dielectric chamber set up between described second pipe (12) and described first pipeline (11), utilizes conductor (16) to be connected with the cable in described cable accessory; Second electrode of described voltage sensor (15) is used for ground connection, or, be connected on an other phase cable with conductor.
8. the high-voltage electric energy meter plug-in unit based on cable accessory according to claim 6, it is characterized in that, described electric energy computation chip (17) is placed in the dielectric chamber of described the first pipeline (11), or, be placed in the dielectric chamber of described second pipe (12).
9. the high-voltage electric energy meter plug-in unit based on cable accessory according to claim 6, it is characterized in that, described plug-in unit also comprises high voltage fuse, concrete: it is inner that described high voltage fuse is arranged on described second pipe (12), connects with described voltage sensor (15).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106546784A (en) * | 2015-09-18 | 2017-03-29 | 侯飞 | A kind of cable accessory constructs the plug-in unit and method of high-voltage electric energy meter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106546784A (en) * | 2015-09-18 | 2017-03-29 | 侯飞 | A kind of cable accessory constructs the plug-in unit and method of high-voltage electric energy meter |
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