CN204188734U - Correct the device of three-phase and four-line efficiency end-error wiring - Google Patents
Correct the device of three-phase and four-line efficiency end-error wiring Download PDFInfo
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- CN204188734U CN204188734U CN201420411928.4U CN201420411928U CN204188734U CN 204188734 U CN204188734 U CN 204188734U CN 201420411928 U CN201420411928 U CN 201420411928U CN 204188734 U CN204188734 U CN 204188734U
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Abstract
The utility model discloses a kind of device correcting the wiring of three-phase and four-line efficiency end-error.This device comprises: data measurement module, wiring judge correction module, communication module, voltage correction module, electric current correction module; Data measurement module, for obtaining each phase current Ia, Ib, Ic of efficiency terminal, neutral line current In, each phase voltage Ua, Ub, Uc and each phase power factor PFa, PFb, PFc; Communication module, the data for data measurement module being obtained are transferred to wiring and judge correction module; Wiring judges correction module, for determining that efficiency terminal does not have to have judged whether wiring error according to above-mentioned data during the too small problem of superpressure, disconnected phase, under-voltage, in-phase voltage or electric current, and carries out error correction by voltage correction module and electric current correction module.The utility model achieves automatic decision wiring whether mistake, and automatically implements back panel wiring error correction, without the need to rewiring again after manually having a power failure.
Description
Technical field
The utility model belongs to power domain, particularly relates to a kind of device correcting the wiring of three-phase and four-line efficiency end-error.
Background technology
Three-phase and four-line electric energy efficiency monitoring terminal (hereinafter referred to as efficiency terminal), by gathering the ac analog such as voltage, electric current, measures the data such as magnitude of voltage, current value, power factor, active power, reactive power, active energy, capacity of idle power.
Efficiency terminal need access A phase voltage (Ua), B line voltage (Ub), C phase voltage (Uc), zero line (Un) totally four pressure-wires, A phase current inlet wire (Ia+), A phase current outlet (Ia-), B phase current inlet wire (Ib+), B phase current outlet (Ib-), C phase current inlet wire (Ic+), C phase current outlet (Ic-) totally 6 current line.
In field wiring process, often exist be hard to tell Chu's voltage phase sequence, the phase sequence of electric current, the line direction of electric current, cause wiring error, the data that efficiency terminal is measured also are wrong, affect Energy Efficiency Analysis.The technical scheme of prior art judges that whether wiring is correct by manual type, and revised by adjustment wiring.Because manual type exists very large subjectivity, by the impact of personal experience and technical merit, often can not accurately judge.And adjustment wiring generally needs power failure operation, many times scene does not possess power failure condition.
Summary of the invention
In view of this, the purpose of this utility model is, a kind of device correcting the wiring of three-phase and four-line efficiency end-error is provided, automatic decision wiring whether can there is mistake, and efficiency terminal can implement back panel wiring error correction voluntarily without the need to the rewiring that manually has a power failure.
For achieving the above object, the utility model embodiment provides a kind of device correcting the wiring of three-phase and four-line efficiency end-error, comprising:
Data measurement module, wiring judge correction module, communication module, voltage correction module, electric current correction module;
Described data measurement module, for obtaining each phase current Ia, Ib, Ic of described efficiency terminal, neutral line current In, each phase voltage Ua, Ub, Uc and each phase power factor PFa, PFb, PFc;
Described communication module, the data for described data measurement module being obtained are transferred to described wiring and judge correction module;
Described wiring judges correction module, for determining that described efficiency terminal does not have superpressure, disconnected phase, under-voltage, in-phase voltage or electric current too small, the difference of the size of all biphase currents is less than first threshold, and described neutral line current In is when being greater than Second Threshold, judge the electric current line wiring error of a wherein phase of described efficiency terminal, and send the first current line correction instruction to described electric current correction module;
Described wiring judges correction module, for not having superpressure, disconnected phase, under-voltage, in-phase voltage or electric current too small in described efficiency terminal, the difference of the size of all biphase currents is less than first threshold, and described neutral line current In be not more than Second Threshold and the symbol of described each phase power factor PFa, PFb, PFc is inconsistent time, judge the pressure-wire wiring error of described efficiency terminal, and send the first pressure-wire correction instruction to described voltage correction module;
Described wiring judges correction module, for not having superpressure, disconnected phase, under-voltage, in-phase voltage or electric current too small in described efficiency terminal, the difference of the size of all biphase currents is less than first threshold, described neutral line current In is not more than described Second Threshold, the symbol of described each phase power factor PFa, PFb, PFc is consistent and absolute value that is described each phase power factor is less than the 3rd threshold value time, judge the pressure-wire wiring error of described efficiency terminal, and send the second pressure-wire correction instruction to described voltage correction module;
Described wiring judges correction module, for there is no superpressure in described efficiency terminal, disconnected phase, under-voltage, in-phase voltage or electric current too small, the difference of the size of all biphase currents is less than first threshold, described neutral line current In is not more than described Second Threshold, described each phase power factor PFa, PFb, the symbol of PFc is consistent, the absolute value of described each phase power factor be not less than described 3rd threshold value and the symbol of described each phase power factor entirely for time negative, judge each phase current line wiring error of described efficiency terminal, and send the second current line correction instruction to described electric current correction module,
Described electric current correction module and described wiring judge that correction module is connected with described data measurement module, for according to described first current line correction instruction, switch the wiring direction of every phase current line of described efficiency terminal successively, until described neutral line current In is not more than described Second Threshold and according to described second current line correction instruction, switches the wiring direction of every phase current line of described efficiency terminal;
Described voltage correction module and described wiring judge that correction module is connected with described data measurement module, for according to described first pressure-wire correction instruction, switch the wiring of every phase voltage line of described efficiency terminal successively, until the symbol of described each phase power factor PFa, PFb, PFc is consistent and according to described second pressure-wire correction instruction, switch the wiring of every phase voltage line of described efficiency terminal successively, until the absolute value of described each phase power factor is not less than described 3rd threshold value.
Preferably, described device also comprises and judges with described communication module and described wiring the pre-judge module that correction module is connected;
Described pre-judge module, judge described efficiency terminal whether superpressure, disconnected phase, under-voltage for each phase voltage value Ua according to described efficiency terminal, Ub, Uc and the relation of phase voltage ratings Ue, and judge whether described efficiency terminal exists in-phase voltage according to the relation of described line magnitude of voltage Uab, Ubc, Uac and phase voltage ratings Ue of stating efficiency terminal;
According to each phase current values of described efficiency terminal and the relation of the 4th threshold value, described pre-judge module, time also for not having superpressure, disconnected phase, a under-voltage or in-phase voltage in described efficiency terminal, judges that whether the electric current of described efficiency terminal is too small.
Preferably, described device also comprises the alarm module be connected with described pre-judge module;
Described pre-judge module, for judge described efficiency terminal each phase voltage value in whether have the magnitude of voltage of at least one phase higher than 1.2Ue, if having, then judge described efficiency terminal superpressure; If there is no superpressure, then judge whether have the magnitude of voltage of at least one phase to be less than 0.8Ue in each phase voltage value of described efficiency terminal, if having, then judge that described efficiency terminal is broken phase; If not disconnected phase, then judge whether have the magnitude of voltage of at least one phase to be less than 0.2Ue in each phase voltage value of described efficiency terminal, if having, then judge that described efficiency terminal is under-voltage; If do not have under-voltage, then judge whether have at least one to be less than 0.2Ue in the line magnitude of voltage of described efficiency terminal, if having, then judge that described efficiency terminal exists in-phase voltage; Described Ue is the phase voltage ratings of described efficiency terminal;
Described pre-judge module, time also for not having superpressure, disconnected phase, a under-voltage or in-phase voltage in described efficiency terminal, judges whether have at least one to be less than 0.5Imax in each phase current values of described efficiency terminal, if having, then judges that the electric current of described efficiency terminal is too small; Described Imax is the maximal value of the secondary current of current transformer, and described current transformer is for obtaining described each phase current values;
Described alarm module, for exporting corresponding alarm according to the judged result of described pre-judge module.
Preferably,
Described first threshold is 0.3*Imax, and described Imax is the maximum absolute value in described each phase current;
And/or;
Described Second Threshold is 1.2*(Ia+Ib+Ic)/3,
And/or;
O.8PFmax described 3rd threshold value is, described PFmax is the maximum absolute value in described each phase power factor PFa, PFb, PFc.
Preferably, described alarm module, also for when switch described three-phase and four-line efficiency terminal every phase current line wiring direction after, when described neutral line current In is still greater than described Second Threshold, output current direction cannot adjust alarm;
Described alarm module, also for when after the wiring of every phase voltage line switching described three-phase and four-line efficiency terminal successively, when the symbol of described each phase power factor PFa, PFb, PFc is still inconsistent, exports the first pressure-wire wiring and cannot adjust alarm;
Described alarm module, also for when after the wiring of every phase voltage line switching described three-phase and four-line efficiency terminal successively, when the absolute value of described each phase power factor is still less than described 3rd threshold value, exports the second pressure-wire wiring and cannot adjust alarm.
Preferably, described device also comprises display module;
Described display module is connected with described electric current correction module with described voltage correction module, for showing the final wiring result of described efficiency terminal;
Preferably, described device also comprises memory module;
Described memory module is connected with described electric current correction module with described voltage correction module, for storing the historical data of the error correction of described efficiency terminal.
Preferably, described voltage correction module and described electric current correction module are integrated in same controller.
Beneficial effect:
Whether the utility model automatic decision wiring can exist mistake, and efficiency terminal can implement back panel wiring error correction voluntarily without the need to the rewiring that manually has a power failure.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, 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 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 embody rule process flow diagram of the utility model method;
Fig. 2 is the utility model pressure-wire error correction way of output figure;
Fig. 3 is the utility model current line error correction way of output figure;
Fig. 4 is the utility model structure drawing of device.
Embodiment
For making the object of the utility model embodiment, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
The utility model embodiment provides one can according to the whether mistake of the relation automatic decision wiring between each phase current of three-phase and four-line electric energy efficiency monitoring terminal (hereinafter referred to as efficiency terminal), neutral line current and each phase power factor, and automatically implements the method for back panel wiring error correction without the need to rewiring again after manually having a power failure.
The method specifically comprises the steps:
Each phase current Ia, Ib, Ic of A, acquisition efficiency terminal, neutral line current In and each phase power factor PFa, PFb, PFc;
B, when determining that efficiency terminal does not have superpressure, disconnected phase, under-voltage, in-phase voltage or electric current too small, wiring whether mistake is judged according to the relation between each phase current of three-phase and four-line electric energy efficiency monitoring terminal, neutral line current and each phase power factor, and when wiring error, according to the error correction of wiring error kind.
The utility model provides following several wiring error kind:
The first, if the difference determining the size of all biphase currents is less than first threshold, and neutral line current In is greater than Second Threshold, then judge the electric current line wiring error of a wherein phase of efficiency terminal.Now, the wiring direction of every phase current line of efficiency terminal need be switched successively, until neutral line current In is not more than Second Threshold.
In the utility model, this first threshold is specifically as follows 0.3*Imax, and Imax is the maximum absolute value in each phase current.Second Threshold can be 1.2*(Ia+Ib+Ic)/3.
If the normal size as A, B, C three-phase current is all in a basic balance, and the wiring of three-phase current line is consistent, neutral line current should be very little.During as found that the size of A, B, C three-phase current is all in a basic balance, neutral line current is but very large, even exceed phase current, be then likely have flowing to of a phase current and other biphase currents inconsistent, cause can not cancelling out each other in zero line of A, B, C three-phase current.Therefore, can judge whether In is greater than 1.2*(Ia+Ib+Ic)/3, as being greater than, then to there is direction of current inconsistent for three-phase current, i.e. the electric current line wiring error of a wherein phase of efficiency terminal.Now can switch the wiring direction of every phase current line of efficiency terminal successively, until neutral line current In is not more than 1.2*(Ia+Ib+Ic)/3.
In the utility model, can determine be above-mentioned electric current line wiring error time, electric current is carried out line and takes turns to switch to b, c, d way of output shown in accompanying drawing 3 (a is the original way of output), until the value of neutral line current meets the requirements.As all invalid in b, c, c tri-kinds of way of outputs, then exportable direction of current cannot adjust alarm, and stops automatically just missing into, so that by other as the mode such as artificial carries out error correction.
The second, if the difference determining the size of all biphase currents is less than first threshold, neutral line current In is not more than Second Threshold and the symbol of each phase power factor PFa, PFb, PFc is inconsistent, then judge the pressure-wire wiring error of efficiency terminal.Now, the wiring of every phase voltage line of efficiency terminal need be switched successively, until the symbol of each phase power factor PFa, PFb, PFc is consistent.
When carrying out error correction, b, c, d, e, f way of output switched to as shown in Figure 2 of specifically pressure-wire of efficiency terminal can being taken turns, until the symbol of PFa, PFb, PFc is consistent.As all invalid in b, c, d, e, f five kinds of way of outputs, then exportable first pressure-wire cannot adjust alarm, and stops automatically just missing journey, so that by other as the mode such as artificial carries out error correction.
The third, if the difference determining the size of all biphase currents is less than first threshold, neutral line current In is not more than Second Threshold, the symbol of each phase power factor PFa, PFb, PFc is consistent and absolute value that is each phase power factor is less than the 3rd threshold value time, then judge the pressure-wire wiring error of efficiency terminal, switch the wiring of every phase voltage line of efficiency terminal successively, until the absolute value of each phase power factor is not less than the 3rd threshold value.
O.8PFmax above-mentioned 3rd threshold value is specifically as follows, and PFmax is the maximum absolute value in each phase power factor PFa, PFb, PFc.
The essence of this kind of judgment mode is to judge that whether PFa, PFb, PFc be in a basic balance.Determination methods is that the maximum absolute value person got in PFa, PFb, PFc is set to PFMax, judges the absolute value of remaining two-phase power factor, whether is more than or equal to 80%PFMax.As undesirable, then b, c, d, e, f way of output switched to as shown in Figure 2 of taking turns, until PFa, PFb, PFc are in a basic balance.As all invalid in b, c, d, e, f five kinds of way of outputs, then exportable second pressure-wire cannot adjust alarm, and stops automatically just missing journey, so that by other as the mode such as artificial carries out error correction.
4th kind, if the difference determining the size of all biphase currents is less than first threshold, neutral line current In is not more than Second Threshold, the symbol of each phase power factor PFa, PFb, PFc is consistent, the absolute value of each phase power factor is not less than the 3rd threshold value and the symbol of each phase power factor is negative entirely, then judge each phase current line wiring error of efficiency terminal, now, the wiring direction of every phase current line of efficiency terminal need be switched.The mode entirely contrary with current way three-phase current is switched to export by the electric current way of output.Specifically, as shown in Figure 3: a<->h; B<->g; C<->f; D<->e.
In specific embodiment of the utility model, judgement can be carried out and error correction to above-mentioned at least one wiring error kind.
It should be noted that, before carrying out above-mentioned wiring error judgement, the utility model also needs the superpressure to efficiency terminal, disconnected phase, under-voltage, in-phase voltage and electric current is too small judges.Only eliminate these situations, the follow-up judgement carrying out wiring error according to electric current and power factor just can be accurately.Before step B, also comprise the steps C and D:
C, each phase voltage value Ua according to efficiency terminal, Ub, Uc and the relation of phase voltage ratings Ue judge efficiency terminal whether superpressure, disconnected phase, under-voltage, and judge whether efficiency terminal exists in-phase voltage according to the relation of line magnitude of voltage Uab, Ubc, Uac and phase voltage ratings Ue of stating efficiency terminal.
Efficiency terminal inner the is pre-set ratings Ue of phase voltage, general low-pressure meter is 220V, and high pressure gauge is 57.7V.Under normal circumstances, Ua, Ub, Uc value should Ue ± 20% deviation range in.As higher than 1.2Ue, then export superpressure alarm, error correction procedure stops; As lower than 0.8Ue, then judge whether this phase voltage is less than 0.2Ue again, as being less than 0.2Ue, export disconnected phase alarm, error correction procedure stops; Otherwise export under-voltage alarm, error correction procedure stops.
Afterwards, check the relation of Uab, Ubc, Uca and Ue, general Uab, Ubc, Uca should be about 1.732Ue.If there is in-phase voltage between A, B, C, so the line voltage of homophase can level off to 0V.As Uab is less than 0.2Ue, then A, B are in-phase voltage; As Ubc is less than 0.2Ue, then B, C are in-phase voltage; As Uca is less than 0.2Ue, then A, C are in-phase voltage.As there is in-phase voltage, efficiency terminal exports in-phase voltage alarm, and error correction procedure stops.
If D efficiency terminal does not have superpressure, disconnected phase, under-voltage or in-phase voltage, then judge that whether the electric current of efficiency terminal is too small according to each phase current values of efficiency terminal and the relation of the 4th threshold value.
Step D comprises:
If efficiency terminal does not have superpressure, disconnected phase, under-voltage or in-phase voltage, then judge whether have at least one to be less than 0.5Imax in each phase current values of efficiency terminal, if having, then the too small alarm of output current; Imax is the maximal value of the secondary current of current transformer, and current transformer is for obtaining each phase current values.
Because efficiency terminal current signal is from CT mutual inductor, the secondary current of mutual inductor is 5A to the maximum, normally when load current is greater than 5%, is just beneficial to judgement wiring.Admittedly whether the value detecting Ia, Ib, Ic is all more than or equal to 5*5%=0.25A, as being less than 0.25A, then the too small alarm of output current, error correction procedure stops.
The utility model following examples disclose the scene of the above-mentioned various error type of a kind of continuous judgement, specifically as shown in Figure 1:
After the artificial wiring of efficiency terminal completes, efficiency terminal powers on operation, after institute's monitoring circuit load loads, starts to start wiring intelligent correction program (hereinafter referred to as error correcting routine):
First, measure A phase voltage, B phase voltage, C phase voltage, AB line voltage, BC line voltage, CA line voltage, judge whether to there is phase shortage, whether there is in-phase voltage, whether there is superpressure, under-voltage, if exist, then export concrete false alarm, carry out hand inspection.Concrete determination methods can see above-mentioned steps C.
If there is not phase shortage, in-phase voltage, superpressure or under-voltage, then measure A phase current, B phase current, C phase current, judge whether to there is electric current too small, if exist, then export concrete false alarm, carry out hand inspection.Concrete determination methods can see above-mentioned steps D.
If it is too small to there is not electric current, then according to the relation of A phase current, B phase current, C phase current and neutral line current, judge that whether three senses of current are consistent, if inconsistent, then electric current line is taken turns to switch to b, c, d way of output shown in accompanying drawing 3 until the value of neutral line current meets the requirements.As all invalid in b, c, c tri-kinds of way of outputs, then output current direction cannot adjust alarm, carries out hand inspection.Concrete, when the difference of the size determining all biphase currents is less than first threshold, and neutral line current In is when being greater than Second Threshold, judge that three senses of current are inconsistent, now, switch the wiring direction of every phase current line of efficiency terminal successively, until neutral line current In is not more than Second Threshold.If the difference determining the size of all biphase currents is less than first threshold, and neutral line current In is not more than Second Threshold, then judge that three senses of current are consistent.
If direction is consistent, then measures A phase power factor, B phase power factor, C phase power factor, total power factor, judge that whether voltage is consistent with the array mode of electric current, if inconsistent, then adjust the mode of connection of the voltage way of output and pressure-wire.Concrete, need judge each phase power factor PFa, PFb, PFc symbol whether consistent, and judge whether the absolute value of each phase power factor is less than the 3rd threshold value.When carrying out pressure-wire error correction, can take turns to switch according to the way of output shown in Fig. 2.It should be noted that, if after carrying out error correction to pressure-wire according to the mode of Fig. 2 because the symbol of each phase power factor PFa, PFb, PFc is inconsistent, follow-up because of have in each phase power factor the absolute value of at least one be less than the 3rd threshold value carry out pressure-wire error correction time, can switch according to mode remaining in Fig. 2.As because of the symbol of each phase power factor PFa, PFb, PFc inconsistent, pressure-wire is adjusted to the c in figure, then because of have in each phase power factor the absolute value of at least one be less than the 3rd threshold value carry out pressure-wire error correction time, can switch according to mode d remaining in Fig. 2, e, f.
If voltage is consistent with the array mode of electric current, then measure the sign bit of A phase power factor, B phase power factor, C phase power factor, total power factor, judge whether A, B, C three-phase current flow direction exists oppositely, whether the symbol namely judging each phase power factor is negative entirely, if exist oppositely, then be adjusted to the way of output all contrary with the three-phase current direction of the current way of output, if do not exist oppositely, then judge that wiring is correct.
In the utility model, understand for the convenience of the user and follow-uply check wiring error correction procedure, the utility model embodiment also final wiring result is shown and the process data of storage wire connection error correction as the whole adjustment mode of electric current line, specifically can with reference to Fig. 2,4 mode store.Adjustment mode as electric current line is stored as (b, c), then to be shown to adjust according to b, c mode of Fig. 3 successively electric current line in whole process.If be stored as (aa), then show not carry out wiring error correction.
Corresponding said method, the utility model additionally provides a kind of device correcting the wiring of three-phase and four-line efficiency end-error.As shown in Figure 4, comprising: data measurement module 11, wiring judge correction module 12, communication module 13, voltage correction module 14, electric current correction module 15, display module 16 and memory module 17;
Data measurement module, for obtaining each phase current Ia, Ib, Ic of efficiency terminal, neutral line current In, each phase voltage Ua, Ub, Uc and each phase power factor PFa, PFb, PFc;
Communication module, the data for data measurement module being obtained are transferred to wiring and judge correction module;
Wiring judges correction module, for when determining that efficiency terminal does not have superpressure, disconnected phase, under-voltage, in-phase voltage or electric current is too small and neutral line current In is greater than Second Threshold, judge the electric current line wiring error of a wherein phase of efficiency terminal, and send the first current line correction instruction to electric current correction module;
Wiring judges correction module, for not having superpressure, disconnected phase, under-voltage, in-phase voltage or electric current too small in efficiency terminal, the difference of the size of all biphase currents is less than first threshold, and neutral line current In be not more than Second Threshold and the symbol of each phase power factor PFa, PFb, PFc is inconsistent time, judge the pressure-wire wiring error of efficiency terminal, and send the first pressure-wire correction instruction to voltage correction module;
Wiring judges correction module, for not having superpressure, disconnected phase, under-voltage, in-phase voltage or electric current too small in efficiency terminal, the difference of the size of all biphase currents is less than first threshold, neutral line current In is not more than Second Threshold, the symbol of each phase power factor PFa, PFb, PFc is consistent and absolute value that is each phase power factor is less than the 3rd threshold value time, judge the pressure-wire wiring error of efficiency terminal, and send the second pressure-wire correction instruction to voltage correction module;
Wiring judges correction module, for not having superpressure, disconnected phase, under-voltage, in-phase voltage or electric current too small in efficiency terminal, the difference of the size of all biphase currents is less than first threshold, neutral line current In is not more than Second Threshold, the symbol of each phase power factor PFa, PFb, PFc is consistent, the absolute value of each phase power factor be not less than the 3rd threshold value and the symbol of each phase power factor entirely for time negative, judge each phase current line wiring error of efficiency terminal, and send the second current line correction instruction to electric current correction module;
Electric current correction module and wiring judge that correction module is connected with data measurement module, for according to the first current line correction instruction, switch the wiring direction of every phase current line of efficiency terminal successively, until neutral line current In is not more than Second Threshold and according to the second current line correction instruction, switches the wiring direction of every phase current line of efficiency terminal;
Voltage correction module and wiring judge that correction module is connected with data measurement module, for according to the first pressure-wire correction instruction, switch the wiring of every phase voltage line of efficiency terminal successively, until the symbol of each phase power factor PFa, PFb, PFc is consistent and according to the second pressure-wire correction instruction, switch the wiring of every phase voltage line of efficiency terminal successively, until the absolute value of each phase power factor is not less than the 3rd threshold value.
Display module is connected with electric current correction module with voltage correction module, for showing the final wiring result of efficiency terminal.
Memory module is connected with electric current correction module with voltage correction module, for storing the historical data of the error correction of efficiency terminal.
Preferably, this device also comprises and judges with communication module and wiring the pre-judge module that correction module is connected;
Pre-judge module, judge efficiency terminal whether superpressure, disconnected phase, under-voltage for each phase voltage value Ua according to efficiency terminal, Ub, Uc and the relation of phase voltage ratings Ue, and judge whether efficiency terminal exists in-phase voltage according to the relation of line magnitude of voltage Uab, Ubc, Uac and phase voltage ratings Ue of stating efficiency terminal;
According to each phase current values of efficiency terminal and the relation of the 4th threshold value, pre-judge module, time also for not having superpressure, disconnected phase, a under-voltage or in-phase voltage in efficiency terminal, judges that whether the electric current of efficiency terminal is too small.
In preferred embodiment, this device also comprises the alarm module be connected with pre-judge module;
Pre-judge module, for judge efficiency terminal each phase voltage value in whether have the magnitude of voltage of at least one phase higher than 1.2Ue, if having, then judge efficiency terminal superpressure; If there is no superpressure, then judge whether have the magnitude of voltage of at least one phase to be less than 0.8Ue in each phase voltage value of efficiency terminal, if having, then judge that efficiency terminal is broken phase; If not disconnected phase, then judge whether have the magnitude of voltage of at least one phase to be less than 0.2Ue in each phase voltage value of efficiency terminal, if having, then judge that efficiency terminal is under-voltage; If do not have under-voltage, then judge whether have at least one to be less than 0.2Ue in the line magnitude of voltage of efficiency terminal, if having, then judge that efficiency terminal exists in-phase voltage; Ue is the phase voltage ratings of efficiency terminal;
Pre-judge module, time also for not having superpressure, disconnected phase, a under-voltage or in-phase voltage in efficiency terminal, judges whether have at least one to be less than 0.5Imax in each phase current values of efficiency terminal, if having, then judges that the electric current of efficiency terminal is too small; Imax is the maximal value of the secondary current of current transformer, and current transformer is for obtaining each phase current values;
Alarm module, for exporting corresponding alarm according to the judged result of pre-judge module.
Above-mentioned alarm module, also for when behind the wiring direction of every phase current line switching three-phase and four-line efficiency terminal, when neutral line current In is still greater than Second Threshold, output current direction cannot adjust alarm; When after the wiring of every phase voltage line switching three-phase and four-line efficiency terminal successively, when the symbol of each phase power factor PFa, PFb, PFc is still inconsistent, exports the first pressure-wire wiring and cannot adjust alarm; When after the wiring of every phase voltage line switching three-phase and four-line efficiency terminal successively, when the absolute value of each phase power factor is still less than the 3rd threshold value, exports the second pressure-wire wiring and cannot adjust alarm.
Preferably, voltage correction module and electric current correction module are integrated in same controller.
Above-mentioned each threshold value can see embodiment of the method.
Said apparatus of the present utility model can be specifically the efficiency terminal in the utility model.
It should be noted that, above-mentioned pre-judge module and wiring judge that correction module can be realized by circuit structure, as subtracter, divider etc., judge for the relation between logarithm value.
Below be only preferred embodiment of the present utility model; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as the utility model protection domain.
Claims (7)
1. correct a device for three-phase and four-line efficiency end-error wiring, it is characterized in that, described device comprises: data measurement module, wiring judge correction module, communication module, voltage correction module, electric current correction module;
Described data measurement module, for obtaining each phase current Ia, Ib, Ic of described efficiency terminal, neutral line current In, each phase voltage Ua, Ub, Uc and each phase power factor PFa, PFb, PFc;
Described communication module, the data for described data measurement module being obtained are transferred to described wiring and judge correction module;
Described wiring judges correction module, for determining that described efficiency terminal does not have superpressure, disconnected phase, under-voltage, in-phase voltage or electric current too small, the difference of the size of all biphase currents is less than first threshold, and described neutral line current In is when being greater than Second Threshold, judge the electric current line wiring error of a wherein phase of described efficiency terminal, and send the first current line correction instruction to described electric current correction module;
Described wiring judges correction module, for not having superpressure, disconnected phase, under-voltage, in-phase voltage or electric current too small in described efficiency terminal, the difference of the size of all biphase currents is less than first threshold, and described neutral line current In be not more than Second Threshold and the symbol of described each phase power factor PFa, PFb, PFc is inconsistent time, judge the pressure-wire wiring error of described efficiency terminal, and send the first pressure-wire correction instruction to described voltage correction module;
Described wiring judges correction module, for not having superpressure, disconnected phase, under-voltage, in-phase voltage or electric current too small in described efficiency terminal, the difference of the size of all biphase currents is less than first threshold, described neutral line current In is not more than described Second Threshold, the symbol of described each phase power factor PFa, PFb, PFc is consistent and absolute value that is described each phase power factor is less than the 3rd threshold value time, judge the pressure-wire wiring error of described efficiency terminal, and send the second pressure-wire correction instruction to described voltage correction module;
Described wiring judges correction module, for there is no superpressure in described efficiency terminal, disconnected phase, under-voltage, in-phase voltage or electric current too small, the difference of the size of all biphase currents is less than first threshold, described neutral line current In is not more than described Second Threshold, described each phase power factor PFa, PFb, the symbol of PFc is consistent, the absolute value of described each phase power factor be not less than described 3rd threshold value and the symbol of described each phase power factor entirely for time negative, judge each phase current line wiring error of described efficiency terminal, and send the second current line correction instruction to described electric current correction module,
Described electric current correction module and described wiring judge that correction module is connected with described data measurement module, for according to described first current line correction instruction, switch the wiring direction of every phase current line of described efficiency terminal successively, until described neutral line current In is not more than described Second Threshold and according to described second current line correction instruction, switches the wiring direction of every phase current line of described efficiency terminal;
Described voltage correction module and described wiring judge that correction module is connected with described data measurement module, for according to described first pressure-wire correction instruction, switch the wiring of every phase voltage line of described efficiency terminal successively, until the symbol of described each phase power factor PFa, PFb, PFc is consistent and according to described second pressure-wire correction instruction, switch the wiring of every phase voltage line of described efficiency terminal successively, until the absolute value of described each phase power factor is not less than described 3rd threshold value;
Described device also comprises and judges with described communication module and described wiring the pre-judge module that correction module is connected;
Described pre-judge module, judge described efficiency terminal whether superpressure, disconnected phase, under-voltage for each phase voltage value Ua according to described efficiency terminal, Ub, Uc and the relation of phase voltage ratings Ue, and judge whether described efficiency terminal exists in-phase voltage according to the relation of described line magnitude of voltage Uab, Ubc, Uac and phase voltage ratings Ue of stating efficiency terminal;
According to each phase current values of described efficiency terminal and the relation of the 4th threshold value, described pre-judge module, time also for not having superpressure, disconnected phase, a under-voltage or in-phase voltage in described efficiency terminal, judges that whether the electric current of described efficiency terminal is too small.
2. device as claimed in claim 1, it is characterized in that, described device also comprises the alarm module be connected with described pre-judge module;
Described pre-judge module, for judge described efficiency terminal each phase voltage value in whether have the magnitude of voltage of at least one phase higher than 1.2Ue, if having, then judge described efficiency terminal superpressure; If there is no superpressure, then judge whether have the magnitude of voltage of at least one phase to be less than 0.8Ue in each phase voltage value of described efficiency terminal, if having, then judge that described efficiency terminal is broken phase; If not disconnected phase, then judge whether have the magnitude of voltage of at least one phase to be less than 0.2Ue in each phase voltage value of described efficiency terminal, if having, then judge that described efficiency terminal is under-voltage; If do not have under-voltage, then judge whether have at least one to be less than 0.2Ue in the line magnitude of voltage of described efficiency terminal, if having, then judge that described efficiency terminal exists in-phase voltage; Described Ue is the phase voltage ratings of described efficiency terminal;
Described pre-judge module, time also for not having superpressure, disconnected phase, a under-voltage or in-phase voltage in described efficiency terminal, judges whether have at least one to be less than 0.5Imax in each phase current values of described efficiency terminal, if having, then judges that the electric current of described efficiency terminal is too small; Described Imax is the maximal value of the secondary current of current transformer, and described current transformer is for obtaining described each phase current values;
Described alarm module, for exporting corresponding alarm according to the judged result of described pre-judge module.
3. device as claimed in claim 1, is characterized in that,
Described first threshold is 0.3*Imax, and described Imax is the maximum absolute value in described each phase current;
And/or;
Described Second Threshold is 1.2*(Ia+Ib+Ic)/3,
And/or;
O.8PFmax described 3rd threshold value is, described PFmax is the maximum absolute value in described each phase power factor PFa, PFb, PFc.
4. device as claimed in claim 2, it is characterized in that, described alarm module, also for when switch described three-phase and four-line efficiency terminal every phase current line wiring direction after, when described neutral line current In is still greater than described Second Threshold, output current direction cannot adjust alarm;
Described alarm module, also for when after the wiring of every phase voltage line switching described three-phase and four-line efficiency terminal successively, when the symbol of described each phase power factor PFa, PFb, PFc is still inconsistent, exports the first pressure-wire wiring and cannot adjust alarm;
Described alarm module, also for when after the wiring of every phase voltage line switching described three-phase and four-line efficiency terminal successively, when the absolute value of described each phase power factor is still less than described 3rd threshold value, exports the second pressure-wire wiring and cannot adjust alarm.
5. the device as described in any one in claim 1-4, is characterized in that, described device also comprises display module;
Described display module is connected with described electric current correction module with described voltage correction module, for showing the final wiring result of described efficiency terminal.
6. the device as described in any one in claim 1-4, is characterized in that, described device also comprises memory module;
Described memory module is connected with described electric current correction module with described voltage correction module, for storing the historical data of the error correction of described efficiency terminal.
7. device as claimed in claim 1, it is characterized in that, described voltage correction module and described electric current correction module are integrated in same controller.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420411928.4U CN204188734U (en) | 2014-07-24 | 2014-07-24 | Correct the device of three-phase and four-line efficiency end-error wiring |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420411928.4U CN204188734U (en) | 2014-07-24 | 2014-07-24 | Correct the device of three-phase and four-line efficiency end-error wiring |
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| CN201420411928.4U Expired - Fee Related CN204188734U (en) | 2014-07-24 | 2014-07-24 | Correct the device of three-phase and four-line efficiency end-error wiring |
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| CN104991151A (en) * | 2015-06-24 | 2015-10-21 | 国家电网公司 | Method and device for analyzing wrong wiring of three-phase four-wire electric energy metering device |
| CN107346891A (en) * | 2016-06-14 | 2017-11-14 | 台州市劲野智能科技有限公司 | SVC with wiring error correction |
| CN107632281A (en) * | 2017-08-31 | 2018-01-26 | 陈劲游 | The investigating method of phase three-wire three metering device wiring automatic detection instrument |
| CN109142829A (en) * | 2018-08-08 | 2019-01-04 | 国网重庆市电力公司电力科学研究院 | A kind of online discriminating method of three-phase and four-line metering device false wiring and system |
| CN109142960A (en) * | 2018-08-08 | 2019-01-04 | 国网重庆市电力公司电力科学研究院 | A kind of online discriminating method of phase three-wire three metering device false wiring and system |
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- 2014-07-24 CN CN201420411928.4U patent/CN204188734U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104991151A (en) * | 2015-06-24 | 2015-10-21 | 国家电网公司 | Method and device for analyzing wrong wiring of three-phase four-wire electric energy metering device |
| CN107346891A (en) * | 2016-06-14 | 2017-11-14 | 台州市劲野智能科技有限公司 | SVC with wiring error correction |
| CN107632281A (en) * | 2017-08-31 | 2018-01-26 | 陈劲游 | The investigating method of phase three-wire three metering device wiring automatic detection instrument |
| CN107632281B (en) * | 2017-08-31 | 2020-01-10 | 陈劲游 | Measurement and control method of automatic wiring detection instrument of three-phase three-wire metering device |
| CN109142829A (en) * | 2018-08-08 | 2019-01-04 | 国网重庆市电力公司电力科学研究院 | A kind of online discriminating method of three-phase and four-line metering device false wiring and system |
| CN109142960A (en) * | 2018-08-08 | 2019-01-04 | 国网重庆市电力公司电力科学研究院 | A kind of online discriminating method of phase three-wire three metering device false wiring and system |
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