CN103293353A - Intelligent type multifunctional digital electric meter and application judging method thereof - Google Patents
Intelligent type multifunctional digital electric meter and application judging method thereof Download PDFInfo
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- CN103293353A CN103293353A CN201210582053XA CN201210582053A CN103293353A CN 103293353 A CN103293353 A CN 103293353A CN 201210582053X A CN201210582053X A CN 201210582053XA CN 201210582053 A CN201210582053 A CN 201210582053A CN 103293353 A CN103293353 A CN 103293353A
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Abstract
The invention provides an intelligent type multifunctional digital electric meter which comprises a voltage input port, a current input interface and a controller. The voltage input port comprises a three-phase voltage terminal and is connected with the three-phase voltage end of a three-phase system, the current input interface comprises a three-phase current terminal and is connected with the three-phase current end of the three-phase system, the controller carries out comparison on the three-phase voltage phases measured by the three-phase voltage terminal of the voltage input port and three-phase current phases measured by the three-phase current terminal of the current input interface, and when any voltage phase and any current phase are smaller than a specific phase angle, the voltage phase and the current phase are judged to be a voltage signal and a current signal of the same phase. Regardless of whether the three-phase voltages and the three-phase currents of the three-phase system are correctly wired to the voltage input port terminal and the current input interface terminal of the intelligent type multifunctional digital electric meter according to a normal state or not, the intelligent type multifunctional digital electric meter can correctly carry out power monitoring measurement, analysis and storage on the three-phase system.
Description
Technical field
The present invention discloses a kind of digital electric meter, particularly a kind of intelligent multifunction digital electric meter and application determination methods thereof.
Background technology
In the prior art at present, a multifunctional digital ammeter of the normal use of industry, the electric power monitoring that this multifunctional digital ammeter can be applicable to general three-phase system measures, analyzes, stores, have complete power measurement function, it comprises: electric current, voltage, electric weight, watt, merit are because of (power factor (PF)), watt-hour, frequency, effectively electric energy calculating and invalid electric energy calculating etc.
Seeing also accompanying drawing 1 and accompanying drawing 2, is multifunctional digital ammeter schematic perspective view of the prior art and multifunctional digital ammeter schematic rear view among the figure.As depicted in figs. 1 and 2, this multifunctional digital ammeter 100 comprises a display screen 110, a panel 120 and a casing 130.This display screen 110 can be that LED LCD Panel, LCD LCD Panel or any display screen of this multifunctional digital ammeter that is applicable to all can.Usually have four buttons on this panel 120, right for being respectively " M " 120a, " P " 120b, " E/T " 120c, " V/A " 120d by a left side.The operation that sees through these four buttons can show different measurement parameters and carry out the parameter setting.
Button " M " 120a is that every button once namely switches maximum/minimum/instantaneous value in regular turn for the maximal value, the minimum value that show present parameter.Each parameter maximal value, the content of minimum value can be as the content shown in following, but be not limited to following content, as: (the line voltage of the voltage between line and the line, Line to Line voltage, L-L) maximum/minimum/instantaneous value, average voltage between line and the line (line voltage, Line to Line voltage, L-L) maximum/minimum, phase voltage (Line to Neutral voltage, L-N) maximum/minimum/instantaneous value, three-phase current maximum/minimum/instantaneous value, three-phase average current maximum/minimum, useful power (KW) maximum/minimum/instantaneous value, effective summed horsepower (KW) maximum/minimum/instantaneous value, reactance capacity (KVAR) maximum/minimum/instantaneous value, total reactance capacity (KVAR) maximum/minimum/instantaneous value, applied power (KWA) maximum/minimum/instantaneous value, total applied power (KWA) maximum/minimum/instantaneous value, power factor (PF) (PF) minimum value, frequency (F) maximum/minimum/instantaneous value, power demand (Power Demand KW) maximal value last time, present power demand sub-range excess time (second), present power demand (Power Demand KW) etc.
Button " P " 120b is for showing each phase power in regular turn, general power, power factor (PF) (Power Factor), frequency (F), power demand (Power Demand), every button once, namely stir one page downwards, displaying contents is as follows, but be not limited to following content, as: useful power (KW), effective summed horsepower (KW), reactance capacity (KVAR), total reactance capacity (KVAR), applied power (KWA), total applied power (KWA), power factor (PF) (PF), frequency (F), power demand (Power Demand KW) last time, present power demand sub-range excess time (second), present power demand (Power Demand KW) etc.
Button " E/T " 120c, be for showing each electric energy summation and time project in regular turn, every button once, namely stir one page downwards, displaying contents is as follows, but be not limited to following content, as: total effectively electric energy (KWH), total invalid electric energy (KVAR), total apparent electric energy (KVAH), date demonstration, Hour Minute Second demonstration etc.
Button " V/A " 120d, be for showing the electric current and voltage correlation parameter in regular turn, every button once, namely stir one page downwards, displaying contents is as follows, but be not limited to following content, as: line voltage, average voltage, phase voltage, average phase voltages, three-phase average current, electric current and voltage unbalance factor, rate of qualified voltage etc.
Casing 130 back sides comprise an accessory power supply port one 31, a digital output port 132, an electric current input interface 133, a Lon port one 34, a voltage input end mouth 135 and a RS-485 interface 136.Wherein, accessory power supply interface 131 is for accepting an accessory power supply, send electricity before, must check power lead insert correct pin (pin) position (N, L) or direct current (,+).Digital output port 132 comprises four pins of two interfaces (pin) output (Com2, DO2, Com1, DO1), one of digital output port 132 first interface pins be (Com1, DO1), one of this digital output port 132 second interface pins be (Com2, DO2).(Com1, DO1) the function selection can be following arbitrary to first interface pins of this digital output port 132: do not have (NONE), any alarm (ANY), overvoltage/overcurrent alarm (OVER V/I), overfrequency alarm (OVER F), cross power demand alarm (OVER Dmd), low-voltage/low current alarm (UNDER V/I), low frequency alarm (UNDER F).The setting of second interface pins of digital output port 132 (Com2, DO2) to select can be following arbitrary to function: pulse output or alarm project, its output frequency is according to Kh(Pulse/KWH) and deciding, and can set the alarm project identical with DO1.Electric current input interface 133 include three groups of six terminals from left to right in regular turn for (3L, 3S, 2L, 2S, 1L, 1S).Lon interface 134 is to use the technology at Lonworks, Lonworks is that a cover special-purpose designs, the distributed monitoring network system of installation, debug and maintenance, and the Lonworks technology is versabus (Universal Bus), can be applied in sensing bus (Sensor Bus), device bus (Device Bus), fieldbus (Field Bus) etc. in industrial control system simultaneously.Voltage input end mouth 135 include four terminals from left to right in regular turn for (N, C, B, A).
In the prior art, if the electric power monitoring of wanting correctly to carry out three-phase system measures, analyzes, stores, comprise: electric current, voltage, electric weight, watt, merit at first must be with three-phase system and the 100 correct wiring that be connected three-phase voltage, three-phase current of this multifunctional digital ammeter because of (power factor (PF)), watt-hour, frequency, effectively electric energy calculating and invalid electric energy calculating etc.Please referring to shown in accompanying drawing 3, accompanying drawing 4 and the accompanying drawing 5, it is three-phase system and these multifunctional digital ammeter 100 correct wiring schematic diagrams that are connected three-phase voltage, three-phase current in the prior art.As shown in Figure 3, it is the three-phase voltage of three-phase, three lines, two current senses, the wiring schematic diagram of three-phase current.As shown in Figure 4, be the three-phase voltage of three-phase, three lines, three current senses, the wiring schematic diagram of three-phase current.As shown in Figure 5, be the three-phase voltage of three-phase, four lines, three current senses, the wiring schematic diagram of three-phase current.In case three-phase system and this multifunctional digital ammeter 100 correctly are not connected the wiring of three-phase voltage, three-phase current, the electric power monitoring that then can't carry out three-phase system measures, analyzes, stores, and generally all needs manually to readjust the correct wiring of three-phase voltage, three-phase current.Illustrate as follows: the A phase voltage of three-phase system correctly is connected the terminal A of this voltage input end mouth 135, the former terminal 1L that correctly should be connected this electric current input interface 133 of the A phase current of three-phase system, 1S, but misconnection is at the terminal 3L of electric current input interface 133,3S, must correctly be connected the A phase current of three-phase system the terminal 1L of this electric current input interface 133 this moment with manual type again, 1S, this multifunctional digital ammeter 100 could carry out correct electric power monitoring to this three-phase system and measure, analyze, store.
Summary of the invention
Need the manual corresponding wiring correctness of adjusting voltage input end and electric current input interface at the above-mentioned intelligent multifunction digital electric meter of mentioning of the prior art, awkward shortcoming, the invention provides a kind of intelligent multifunction digital electric meter, no matter whether the three-phase voltage in the three-phase system, three-phase current be according to voltage input end mouth terminal and the electric current input interface terminal of the correct wiring of normal condition at this intelligent multifunction digital electric meter, and the electric power monitoring that can correctly carry out three-phase system behind this intelligent multifunction digital electric meter measures, analyzes, stores.
The technical scheme that the present invention solves its technical matters employing is: a kind of intelligent multifunction digital electric meter, and this digital electric meter comprises: a voltage input end mouth, comprise the three-phase voltage terminal, be connected with the three-phase electricity pressure side of a three-phase system; One electric current input interface comprises the three-phase current terminal, is connected with the three-phase current end of described three-phase system; An and controller, the three-phase current phase place that the three-phase voltage phase place that three-phase voltage terminal in the described voltage input end mouth is measured and the three-phase current terminal in the described electric current input interface measure is compared, when arbitrary voltage-phase and arbitrary current phase less than particular phase angle, then be judged as the two and be the voltage signal of same phase and current signal.
A kind of intelligent multifunction digital electric meter, this digital electric meter comprises: a voltage input end mouth, comprise the three-phase voltage terminal, be connected with the three-phase electricity pressure side of a three-phase system; One electric current input interface comprises the three-phase current terminal, is connected with the three-phase current end of described three-phase system; An and controller, the three-phase current phase place that the three-phase voltage phase place that three-phase voltage terminal in the described voltage input end mouth is measured and the three-phase current terminal in the described electric current input interface measure is compared, three-phase voltage in described three-phase system, the incorrect wiring of three-phase current is at described each terminal of voltage input end mouth and described each terminal of electric current input interface, the intelligent multifunction digital electric meter carries out the phase differential of arbitrary voltage-phase and arbitrary current phase and judges, when arbitrary voltage-phase and arbitrary current phase less than particular phase angle, then be judged as the two and be the voltage signal of same phase and current signal, according to three-phase voltage and the three-phase current of correct correspondence, the electric power monitoring that the intelligent multifunction digital electric meter can correctly carry out this three-phase system measures.
A kind of determination methods of intelligent multifunction digital electric meter, this method comprises the following step: (1) is with the voltage of three-phase system and electric current wiring each terminal of voltage input end mouth and each terminal of electric current input interface at an intelligent multifunction digital electric meter; (2) voltage of judging described three-phase system and electric current correct corresponding each terminal of voltage input end mouth and each terminal of electric current input interface that is connected in the intelligent multifunction digital electric meter whether; And (3) each voltage-phase and each current phase of being measured by each terminal of voltage input end mouth and each terminal of electric current input interface of intelligent multifunction digital electric meter, when arbitrary voltage-phase and arbitrary current phase less than particular phase angle, then be judged as the two and be voltage signal and the current signal of same phase.
A kind of determination methods of intelligent multifunction digital electric meter, this method comprises the following step: (1) is with the voltage in the three-phase system and electric current wiring each terminal of voltage input end mouth and each terminal of electric current input interface at an intelligent multifunction digital electric meter; And (2) each voltage-phase and each current phase of being measured by each terminal of voltage input end mouth and each terminal of electric current input interface of intelligent multifunction digital electric meter, between arbitrary voltage-phase and arbitrary current phase, less than a particular phase angle, then be judged as the two and be voltage signal and the current signal of same phase.
A kind of determination methods of intelligent multifunction digital electric meter, this method comprises the following step: (1) is with the voltage in the three-phase system and electric current wiring each terminal of voltage input end mouth and each terminal of electric current input interface at an intelligent multifunction digital electric meter; And the three-phase current phase place that (2) three-phase voltage phase place that the three-phase voltage terminal in the voltage input end mouth is measured and the three-phase current terminal in the electric current input interface measure is compared, three-phase voltage in three-phase system, the incorrect wiring of three-phase current is at each terminal of voltage input end mouth and each terminal of electric current input interface, the intelligent multifunction digital electric meter carries out the phase differential of arbitrary voltage-phase and arbitrary current phase and judges, phase differential between arbitrary voltage-phase and arbitrary current phase is less than particular phase angle, then be judged as the two and be the voltage signal of same phase and current signal, according to three-phase voltage and the three-phase current of correct correspondence, the electric power monitoring that the intelligent multifunction digital electric meter can correctly carry out this three-phase system measures.
The technical scheme that the present invention solves its technical matters employing further comprises:
Described particular phase angle is 120 degree.
The invention has the beneficial effects as follows: no matter whether the three-phase voltage in the three-phase system, three-phase current be according to voltage input end mouth terminal and the electric current input interface terminal of the correct wiring of normal condition at this intelligent multifunction digital electric meter when using in the present invention, and the electric power monitoring that can correctly carry out three-phase system behind this intelligent multifunction digital electric meter measures, analyzes, storage.
The present invention will be further described below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 is multifunctional digital ammeter schematic perspective view of the prior art.
Fig. 2 is multifunctional digital ammeter schematic rear view of the prior art.
Fig. 3 correctly is connected three-phase voltage wiring schematic diagram one for three-phase system of the prior art with the multifunctional digital ammeter.
Fig. 4 correctly is connected three-phase current wiring schematic diagram two for three-phase system of the prior art with the multifunctional digital ammeter.
Fig. 5 correctly is connected three-phase current wiring schematic diagram three for three-phase system of the prior art with the multifunctional digital ammeter.
Fig. 6 is intelligent multifunction digital electric meter schematic perspective view among the present invention.
Fig. 7 is intelligent multifunction digital electric meter back side schematic perspective view among the present invention.
Fig. 8 is the determination methods synoptic diagram of intelligent multifunction digital electric meter among the present invention.
Fig. 9 is another determination methods synoptic diagram of intelligent multifunction digital electric meter among the present invention.
Among the figure, 100-multifunctional digital ammeter, 110-display screen, the 120-panel, 120a-" M " button, 120b-" P " button, 120c-" E/T " button, 120d-" V/A " button, the 130-casing, 131-accessory power supply interface, 132-digital output port, 133-electric current input interface, the 134-Lon interface, 135-voltage input end mouth, 136-RS485 interface, 200-intelligent multifunction digital electric meter, the 210-display screen, 220-panel, 220a-" Volt/Amp " button, 220b-" Harm " button, 220c-" Power " button, 220d-" Energy " button, 230-casing, 3L, 3S, 2L, 2S, 1L, 1S electric current input interface terminal, N, C, B, A voltage input end mouth terminal.
Embodiment
Present embodiment is the preferred embodiment for the present invention, and other all its principles are identical with present embodiment or approximate with basic structure, all within protection domain of the present invention.
See also accompanying drawing 6 and accompanying drawing 7, it is the intelligent multifunction digital electric meter schematic perspective view of this case preferred embodiment.As shown in Figure 6 and Figure 7, the intelligent multifunction digital electric meter 200 among the present invention comprises a display screen 210, a panel 220 and a casing 230.In the present embodiment, display screen 210 can be LED LCD Panel, LCD LCD Panel or any display screen that is applicable to this multifunctional digital ammeter.In the present embodiment, panel 220 is provided with four buttons, right for being respectively " Volt/Amp " 220a, " Harm " 220b, " Power " 220c, " Energy " 220d by a left side, the operation by these four buttons can show different measurement parameters and carry out the parameter setting.
In the present embodiment, button " Volt/Amp " 220a, be used for switching successively and show the electric current and voltage correlation parameter, every button once, namely stir one page downwards, displaying contents is as follows, but is not limited to following content: line voltage, average voltage, phase voltage, average phase voltages, three-phase average current, electric current and voltage unbalance factor, rate of qualified voltage etc.
In the present embodiment, button " Harm " 220b is used for switching successively maximal value, the minimum value that shows present parameter, and every button once namely switches maximum/minimum/instantaneous value in regular turn.Each parameter maximal value, holding within the minimum value can be to hold within shown in following, but be not limited to following content: (the line voltage of the voltage between line and the line, Line to Line voltage, L-L) maximum/minimum/instantaneous value, average voltage between line and the line (line voltage, Line to Line voltage, L-L) maximum/minimum, phase voltage (Line to Neutral voltage, L-N) maximum/minimum/instantaneous value, three-phase current maximum/minimum/instantaneous value, three-phase average current maximum/minimum, useful power (KW) maximum/minimum/instantaneous value, effective summed horsepower (KW) maximum/minimum/instantaneous value, reactance capacity (KVAR) maximum/minimum/instantaneous value, total reactance capacity (KVAR) maximum/minimum/instantaneous value, applied power (KWA) maximum/minimum/instantaneous value, total applied power (KWA) maximum/minimum/instantaneous value, power factor (PF) (PF) minimum value, frequency (F) maximum/minimum/instantaneous value, power demand (Power Demand KW) maximal value last time, present power demand sub-range excess time (second), present power demand (Power Demand KW) etc.
In the present embodiment, button " Power " 220c, be used for switching successively and show each phase power, general power, power factor (PF) (Power Factor), frequency (F), power demand (Power Demand), every button once, namely stir one page downwards, displaying contents is as follows, but is not limited to following content: useful power (KW), effective summed horsepower (KW), reactance capacity (KVAR), total reactance capacity (KVAR), applied power (KWA), total applied power (KWA), power factor (PF) (PF), frequency (F), power demand (Power Demand KW) last time, present power demand sub-range excess time (second), present power demand (Power Demand KW) etc.
In the present embodiment, button " Energy " 220d, be used for switching successively and show each electric energy summation and time project, every button once, namely stir one page downwards, displaying contents is as follows, but is not limited to following content: total effectively electric energy (KWH), total invalid electric energy (KVAR), total apparent electric energy (KVAH), date demonstration, Hour Minute Second demonstration etc.
In the present embodiment, casing 230 back sides are provided with a voltage input end mouth 241 and an electric current input interface 242.This voltage input end mouth 241 include four terminals (N, C, B, A), this electric current input interface 242 include three groups of six terminals from left to right in regular turn for (3L, 3S, 2L, 2S, 1L, 1S).
Situation one: as the A phase terminal 1L in the electric current input interface 242 of intelligent multifunction digital electric meter 200 in the present invention of the A phase current wiring in the three-phase system, 1S, three-phase system (is monitored external three-phase alternating current, its three phase lines are defined as the A phase respectively, B mutually with C mutually) in the electric current input interface 242 of B phase current wiring intelligent multifunction digital electric meter 200 in the present invention in B phase terminal 2L, 2S, C phase terminal 3L in the electric current input interface 242 of the C phase current wiring intelligent multifunction digital electric meter 200 in the present invention in the three-phase system, during 3S, and the A phase terminal 1L in the electric current input interface 242 of the intelligent multifunction digital electric meter 200 of wiring in corresponding to the present invention not of the A phase voltage in the three-phase system, among the 1S corresponding to the A phase terminal in the voltage input end mouth 241 of the intelligent multifunction digital electric meter 200 among the present invention, C phase terminal 3L in the electric current input interface 242 of the intelligent multifunction digital electric meter 200 of wiring in corresponding to the present invention on the contrary, 3S is corresponding to the C phase terminal in the voltage input end mouth 241 of the intelligent multifunction digital electric meter 200 among the present invention, B phase terminal 2L in the electric current input interface 242 of the intelligent multifunction digital electric meter 200 of B phase voltage wiring in corresponding to the present invention in the three-phase system, 2S is corresponding to the B phase terminal in the voltage input end mouth 241 of the intelligent multifunction digital electric meter 200 among the present invention, A phase terminal 1L in the electric current input interface 242 of the intelligent multifunction digital electric meter 200 of C phase voltage wiring in corresponding to the present invention in the three-phase system, 1S is corresponding to the A phase terminal in the voltage input end mouth 241 of this intelligent multifunction digital electric meter 200 among the present invention, the A phase terminal 1L in the electric current input interface 242 of the intelligent multifunction digital electric meter 200 of the intelligent multifunction digital electric meter 200 among the present invention in can be according to the present invention then, A phase terminal in the voltage input end mouth 241 of the current phase that 1S measures and intelligent multifunction digital electric meter 200 of the present invention, B phase terminal in the voltage input end mouth 241 of the intelligent multifunction digital electric meter 200 among the present invention, the voltage-phase that C phase terminal in the voltage input end mouth 241 of this intelligent multifunction digital electric meter 200 measures compares, only at voltage, current phase differs less than a particular phase angle (for example: under the situation 120 degree), be only the A phase terminal 1L in the electric current input interface 242 of intelligent multifunction digital electric meter 200 of the present invention, the current signal that 1S measured should corresponding voltage signal.Be example with above-mentioned situation, intelligent multifunction digital electric meter 200 among the present invention can correctly judge voltage signal that the C phase terminal in the voltage input end mouth 241 of intelligent multifunction digital electric meter 200 measured be only really should be corresponding be A phase terminal 1L in the electric current input interface 242 of intelligent multifunction digital electric meter 200, the current signal that 1S measured.In like manner, intelligent multifunction digital electric meter 200 can be judged the B phase terminal 2L in the electric current input interface 242 of intelligent multifunction digital electric meter 200, and what the current signal that 2S measured really should be corresponding is the voltage signal that the B phase terminal in the voltage input end mouth 241 is measured in the intelligent multifunction digital electric meter 200; Intelligent multifunction digital electric meter 200 can be judged the C phase terminal 3L in the electric current input interface 242 of intelligent multifunction digital electric meter 200, and the current signal that 3S measured really should be corresponding is the voltage signal that the A phase terminal in the voltage input end mouth 241 of intelligent multifunction digital electric meter 200 is measured.
Therefore, intelligent multifunction digital electric meter 200 among the present invention can correctly judge automatically each phase voltage signal should be corresponding each phase current signal, intelligent multifunction digital electric meter 200 is the voltage of three characteristics of the middle term system and voltage input end mouth and the electric current input interface that current error is wired to intelligent multifunction digital electric meter 200 not, and causes correctly carrying out the situation that the electric power monitoring of three-phase system measures, analyzes, stores.In other words, even if the voltage of three-phase system and electric current are not wired to voltage input end mouth and the current input terminal mouth of intelligent multifunction digital electric meter 200 according to normal operating condition, the electric power monitoring that intelligent multifunction digital electric meter 200 still can correctly carry out three-phase system measures, analyzes, stores.
Situation two: the A phase terminal in the voltage input end mouth 241 of the A phase voltage wiring intelligent multifunction digital electric meter 200 in the present invention in the three-phase system, B phase terminal in the voltage input end mouth 241 of the B phase voltage wiring intelligent multifunction digital electric meter 200 in the present invention in the three-phase system, during C phase terminal in the voltage input end mouth 241 of the C phase voltage wiring intelligent multifunction digital electric meter 200 in the present invention in the three-phase system, and the A phase terminal 1L in the electric current input interface 242 of wiring intelligent multifunction digital electric meter 200 in the present invention not of the A phase current in the three-phase system, 1S, B phase terminal 2L in the electric current input interface 242 of wiring intelligent multifunction digital electric meter 200 in the present invention on the contrary, 2S, C phase terminal 3L in the electric current input interface 242 of the B phase current wiring intelligent multifunction digital electric meter 200 in the present invention in the three-phase system, 3S, A phase terminal 1L in the electric current input interface 242 of the C phase current wiring intelligent multifunction digital electric meter 200 in the present invention in the three-phase system, 1S, A phase terminal 1L in the voltage-phase that intelligent multifunction digital electric meter 200 among the present invention can measure according to the A phase terminal in the voltage input end mouth 241 of intelligent multifunction digital electric meter 200 and the electric current input interface 242 of the intelligent multifunction digital electric meter 200 among the present invention, 1S, B phase terminal 2L in the electric current input interface 242,2S, C phase terminal 3L in the electric current input interface 242, the current phase that 3S measures compares, only at voltage, current phase differs under the situation less than a particular phase angle (for example: 120 degree), and being only the voltage signal that the A phase terminal in the voltage input end mouth 241 of intelligent multifunction digital electric meter 200 of the present invention measures should corresponding current signal.Be example with above-mentioned situation, intelligent multifunction digital electric meter 200 among the present invention can correctly be judged the B phase terminal 2L in the electric current input interface 242 of intelligent multifunction digital electric meter 200, the current signal that 2S measured be only really should be corresponding be the voltage signal that the A phase terminal in the voltage input end mouth 241 of the intelligent multifunction digital electric meter 200 among the present invention is measured.In like manner, intelligent multifunction digital electric meter 200 among the present invention can judge that voltage signal that the B phase terminal in the voltage input end mouth 241 of intelligent multifunction digital electric meter 200 measured really should be corresponding is C phase terminal 3L in the electric current input interface 242 of intelligent multifunction digital electric meter 200, the current signal that 3S measured; Intelligent multifunction digital electric meter 200 can judge that voltage signal that the C phase terminal in the voltage input end mouth 241 of intelligent multifunction digital electric meter 200 measured really should be corresponding among the present invention is A phase terminal 1L in the electric current input interface 242 of intelligent multifunction digital electric meter 200, the current signal that 1S measured.
Therefore the intelligent multifunction digital electric meter 200 among the present invention can correctly be judged each phase current signal that each phase voltage signal institute should correspondence automatically, intelligent multifunction digital electric meter 200 is the voltage in the three characteristics of the middle term system and the current error voltage input end mouth and the electric current input interface that are wired to intelligent multifunction digital electric meter 200 not, and causes correctly carrying out the situation that the electric power monitoring of three-phase system measures, analyzes, stores.In other words, even if the voltage in the three-phase system and electric current are not wired to voltage input end mouth and the current input terminal mouth of intelligent multifunction digital electric meter 200 according to normal operating condition, the electric power monitoring that intelligent multifunction digital electric meter 200 still can correctly carry out three-phase system measures, analyzes, stores.
Situation three: the A phase terminal in the voltage input end mouth 241 of the A phase voltage wiring intelligent multifunction digital electric meter 200 in the present invention in the three-phase system, B phase terminal in the voltage input end mouth 241 of the B phase voltage wiring intelligent multifunction digital electric meter 200 in the present invention in the three-phase system, during C phase terminal in the voltage input end mouth 241 of the C phase voltage wiring intelligent multifunction digital electric meter 200 in the present invention in the three-phase system, and the A phase terminal 1L of wiring in the electric current input interface 242 of intelligent multifunction digital electric meter 200 not of the A phase current in the three-phase system, 1S, the C phase terminal 3L of wiring in the electric current input interface 242 of intelligent multifunction digital electric meter 200 on the contrary, 3S, the B phase terminal 2L of B phase current wiring in the three-phase system in the electric current input interface 242 of intelligent multifunction digital electric meter 200,2S, the A phase terminal 1L of C phase current wiring in the three-phase system in the electric current input interface 242 of intelligent multifunction digital electric meter 200,1S, in like manner in situation one, the analysis explanation of situation two, intelligent multifunction digital electric meter 200 can correctly judge automatically each phase voltage signal should be corresponding each phase current signal, intelligent multifunction digital electric meter 200 is the voltage of three characteristics of the middle term system and voltage input end mouth and the electric current input interface that current error is wired to intelligent multifunction digital electric meter 200 not, and the electric power monitoring that causes correctly carrying out three-phase system measures, analyze, situation about storing.In other words, even if the voltage of three-phase system and electric current are not wired to voltage input end mouth and the current input terminal mouth of intelligent multifunction digital electric meter 200 according to normal operating condition, the electric power monitoring that intelligent multifunction digital electric meter 200 still can correctly carry out three-phase system measures, analyzes, stores.
Situation four: the A phase terminal 1L in the electric current input interface 242 of A phase current wiring at intelligent multifunction digital electric meter 200 of the present invention in the three-phase system, 1S, the B phase terminal 2L of B phase current wiring in the three-phase system in the electric current input interface 242 of intelligent multifunction digital electric meter 200,2S, the C phase terminal 3L of C phase current wiring in the three-phase system in the electric current input interface 242 of intelligent multifunction digital electric meter 200, during 3S, and the A phase terminal of wiring in the voltage input end mouth 241 of intelligent multifunction digital electric meter 200 not of the A phase voltage in the three-phase system, the B phase terminal of wiring in the voltage input end mouth 241 of intelligent multifunction digital electric meter 200 on the contrary, the C phase terminal of B phase voltage wiring in the voltage input end mouth 241 of intelligent multifunction digital electric meter 200 in the three-phase system, the A phase terminal of C phase voltage wiring in the voltage input end mouth 241 of intelligent multifunction digital electric meter 200 in the three-phase system, in like manner in situation one, the analysis explanation of situation two, intelligent multifunction digital electric meter 200 can correctly judge automatically each phase voltage signal should be corresponding each phase current signal, intelligent multifunction digital electric meter 200 is the voltage of three characteristics of the middle term system and voltage input end mouth and the electric current input interface that current error is wired to intelligent multifunction digital electric meter 200 not, and the electric power monitoring that causes correctly carrying out three-phase system measures, analyze, situation about storing.In other words, even if the voltage of three-phase system and electric current are not wired to voltage input end mouth and the current input terminal mouth of intelligent multifunction digital electric meter 200 according to normal operating condition, the electric power monitoring that intelligent multifunction digital electric meter 200 still can correctly carry out three-phase system measures, analyzes, stores.
See also accompanying drawing 8, Fig. 8 is the determination methods synoptic diagram of the intelligent multifunction digital electric meter of the preferred embodiment of the present invention.As shown in Figure 8, voltage input end mouth and the electric current input interface that at first voltage and the electric current of three-phase system is wired to the intelligent multifunction digital electric meter; Whether the voltage of then judging three-phase system and electric current correct corresponding voltage input end mouth and the electric current input interface that is wired to the intelligent multifunction digital electric meter; Each voltage-phase and each current phase that are measured by voltage input end mouth and each terminal of electric current input interface of intelligent multifunction digital electric meter, when arbitrary voltage-phase and arbitrary current phase less than a particular phase angle (for example: 120 degree), be judged as voltage signal and the current signal of same phase; And the intelligent multifunction digital electric meter measures, analyzes or store according to the three-phase voltage signal of correct correspondence and the electric power monitoring that current signal carries out three-phase system.
See also accompanying drawing 9, Fig. 9 is another determination methods synoptic diagram of the intelligent multifunction digital electric meter of the preferred embodiment of the present invention.As shown in Figure 9, at first with the voltage of three-phase system and electric current wiring voltage input end mouth and the electric current input interface at the intelligent multifunction digital electric meter; Each voltage-phase and each current phase that are measured by voltage input end mouth and each terminal of electric current input interface of intelligent multifunction digital electric meter, (for example: person 120 degree) is judged as voltage signal and the current signal of same phase less than a particular phase angle when arbitrary voltage-phase and arbitrary current phase; And the intelligent multifunction digital electric meter is according to correctly the three-phase voltage signal of correspondence and the electric power monitoring that current signal carries out three-phase system measure, analyze or store.
Comprehensive above-mentioned explanation as can be known, even three-phase system correctly is not connected three-phase voltage with multifunctional digital ammeter 200, the wiring of three-phase current, intelligent multifunction digital electric meter among the present invention can overcome prior art need detect the correct corresponding of three-phase voltage and three-phase current in the three-phase system again with manual type, and then rewiring each phase terminal in the voltage input end mouth of multifunctional digital ammeter 200 and the disappearance of each phase terminal of electric current input interface, and still can judge automatically and correct corresponding each phase voltage that measures and each phase current, the electric power monitoring that further carries out three-phase system measures, analyze, store, comprising: electric current, voltage, electric weight, watt, merit is because of (power factor (PF)), watt-hour, frequency, effectively electric energy calculating and invalid electric energy calculating etc.
Intelligent multifunction digital electric meter of the present invention can utilize microchip controller model dsPICFJ33MC256710A and adopt general conventional bleeder circuit and divided circuit, the voltage signal that the three-phase current signal of obtaining the three-phase voltage signal of three-phase system and three-phase system is changed into, send into this microchip controller, by this microchip controller in house software program setting judgment mechanism or algorithm rule, can reach above-mentioned intelligent multifunction digital electric meter judges and correct corresponding each phase voltage that measures and the function of each phase current automatically, the electric power monitoring that a step carries out three-phase system of going forward side by side measures, analyze, store, comprising: electric current, voltage, electric weight, watt, merit is because of (power factor (PF)), watt-hour, frequency, effectively electric energy calculating and invalid electric energy calculating etc.Yet the use of microchip controller is not limited to said chip, all suitable judgment mechanism or algorithms can set are in microchip controller in house software program arbitrarily, can reach above-mentioned purpose person, all can use intelligent multifunction digital electric meter in the present invention.
Comprehensively above-mentioned, purpose of the present invention fully and is effectively disclosed, and the person familiar with the technology can be understood, yet the interest field of this patent is not confined to above-described embodiment.This case must be thought and is to modify right neither taking off as Protector that attached claim is desired as all by the personage Ren Shi craftsman who is familiar with this technology.
Claims (10)
1. intelligent multifunction digital electric meter, it is characterized in that: described digital electric meter comprises:
One voltage input end mouth comprises the three-phase voltage terminal, is connected with the three-phase electricity pressure side of a three-phase system;
One electric current input interface comprises the three-phase current terminal, is connected with the three-phase current end of described three-phase system;
An and controller, the three-phase current phase place that the three-phase voltage phase place that three-phase voltage terminal in the described voltage input end mouth is measured and the three-phase current terminal in the described electric current input interface measure is compared, when arbitrary voltage-phase and arbitrary current phase less than particular phase angle, then be judged as the two and be the voltage signal of same phase and current signal.
2. intelligent multifunction digital electric meter according to claim 1 is characterized in that: described particular phase angle is 120 degree.
3. intelligent multifunction digital electric meter, it is characterized in that: described digital electric meter comprises:
One voltage input end mouth comprises the three-phase voltage terminal, is connected with the three-phase electricity pressure side of a three-phase system;
One electric current input interface comprises the three-phase current terminal, is connected with the three-phase current end of described three-phase system;
An and controller, the three-phase current phase place that the three-phase voltage phase place that three-phase voltage terminal in the described voltage input end mouth is measured and the three-phase current terminal in the described electric current input interface measure is compared, three-phase voltage in described three-phase system, the incorrect wiring of three-phase current is at described each terminal of voltage input end mouth and described each terminal of electric current input interface, the intelligent multifunction digital electric meter carries out the phase differential of arbitrary voltage-phase and arbitrary current phase and judges, when arbitrary voltage-phase and arbitrary current phase less than particular phase angle, then be judged as the two and be the voltage signal of same phase and current signal, according to three-phase voltage and the three-phase current of correct correspondence, the electric power monitoring that the intelligent multifunction digital electric meter can correctly carry out this three-phase system measures.
4. intelligent multifunction digital electric meter according to claim 3 is characterized in that: described particular phase angle is 120 degree.
5. the determination methods of an intelligent multifunction digital electric meter, it is characterized in that: described method comprises the following step:
(1) with the voltage of three-phase system and electric current wiring each terminal of voltage input end mouth and each terminal of electric current input interface at an intelligent multifunction digital electric meter;
(2) voltage of judging described three-phase system and electric current correct corresponding each terminal of voltage input end mouth and each terminal of electric current input interface that is connected in the intelligent multifunction digital electric meter whether; And
(3) each voltage-phase and each current phase that is measured by each terminal of voltage input end mouth and each terminal of electric current input interface of intelligent multifunction digital electric meter, when arbitrary voltage-phase and arbitrary current phase less than particular phase angle, then be judged as the two and be voltage signal and the current signal of same phase.
6. the determination methods of intelligent multifunction digital electric meter according to claim 5 is characterized in that: described particular phase angle is 120 degree.
7. the determination methods of an intelligent multifunction digital electric meter, it is characterized in that: described method comprises the following step:
(1) with the voltage in the three-phase system and electric current wiring each terminal of voltage input end mouth and each terminal of electric current input interface at an intelligent multifunction digital electric meter; And
(2) each voltage-phase and each current phase that is measured by each terminal of voltage input end mouth and each terminal of electric current input interface of intelligent multifunction digital electric meter, between arbitrary voltage-phase and arbitrary current phase, less than a particular phase angle, then be judged as the two and be voltage signal and the current signal of same phase.
8. the determination methods of intelligent multifunction digital electric meter according to claim 7 is characterized in that: described particular phase angle is 120 degree.
9. the determination methods of an intelligent multifunction digital electric meter, it is characterized in that: described method comprises the following step:
(1) with the voltage in the three-phase system and electric current wiring each terminal of voltage input end mouth and each terminal of electric current input interface at an intelligent multifunction digital electric meter; And
(2) the three-phase current phase place that measures of the three-phase voltage phase place that the three-phase voltage terminal in the voltage input end mouth is measured and the three-phase current terminal in the electric current input interface is compared, three-phase voltage in three-phase system, the incorrect wiring of three-phase current is at each terminal of voltage input end mouth and each terminal of electric current input interface, the intelligent multifunction digital electric meter carries out the phase differential of arbitrary voltage-phase and arbitrary current phase and judges, phase differential between arbitrary voltage-phase and arbitrary current phase is less than particular phase angle, then be judged as the two and be the voltage signal of same phase and current signal, according to three-phase voltage and the three-phase current of correct correspondence, the electric power monitoring that the intelligent multifunction digital electric meter can correctly carry out this three-phase system measures.
10. the determination methods of intelligent multifunction digital electric meter according to claim 9 is characterized in that: described particular phase angle is 120 degree.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210582053XA CN103293353A (en) | 2012-12-28 | 2012-12-28 | Intelligent type multifunctional digital electric meter and application judging method thereof |
| TW102117694A TW201425943A (en) | 2012-12-28 | 2013-05-20 | Intelligent type multifunctional digital electric meter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210582053XA CN103293353A (en) | 2012-12-28 | 2012-12-28 | Intelligent type multifunctional digital electric meter and application judging method thereof |
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| CN103293353A true CN103293353A (en) | 2013-09-11 |
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| CN201210582053XA Pending CN103293353A (en) | 2012-12-28 | 2012-12-28 | Intelligent type multifunctional digital electric meter and application judging method thereof |
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| TW (1) | TW201425943A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104777395A (en) * | 2014-01-15 | 2015-07-15 | 浙江万胜电力仪表有限公司 | Method for detecting breaking of B-phase voltage circuit of three-phase three-wire power meter |
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| CN2854608Y (en) * | 2005-12-22 | 2007-01-03 | 江苏省电力公司盐城供电公司 | Electric energy metering data monitor |
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| CN202281802U (en) * | 2011-09-22 | 2012-06-20 | 深圳市锐能微科技有限公司 | Three-phase three-wire electric energy meter |
| CN102692535A (en) * | 2011-03-25 | 2012-09-26 | 深圳市锐能微科技有限公司 | Electric energy metering chip and three-phase four-wire electric energy meter |
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| CN2854608Y (en) * | 2005-12-22 | 2007-01-03 | 江苏省电力公司盐城供电公司 | Electric energy metering data monitor |
| CN102183706A (en) * | 2011-03-11 | 2011-09-14 | 深圳市锐能微科技有限公司 | Device and method for correcting metering of three-phase three-wire false wiring |
| CN102692535A (en) * | 2011-03-25 | 2012-09-26 | 深圳市锐能微科技有限公司 | Electric energy metering chip and three-phase four-wire electric energy meter |
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| CN104777395A (en) * | 2014-01-15 | 2015-07-15 | 浙江万胜电力仪表有限公司 | Method for detecting breaking of B-phase voltage circuit of three-phase three-wire power meter |
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| Publication number | Publication date |
|---|---|
| TW201425943A (en) | 2014-07-01 |
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Application publication date: 20130911 |