CN104898757A - Power output control method of electric power acquisition system - Google Patents
Power output control method of electric power acquisition system Download PDFInfo
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- CN104898757A CN104898757A CN201510114259.3A CN201510114259A CN104898757A CN 104898757 A CN104898757 A CN 104898757A CN 201510114259 A CN201510114259 A CN 201510114259A CN 104898757 A CN104898757 A CN 104898757A
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Abstract
The invention provides a power output control method of an electric power acquisition system. The method comprises the steps of: firstly, acquiring a first voltage signal through a detection circuit according to a current signal output from an acquisition end; secondly, acquiring a second voltage signal through the detection circuit according to the current signal output from the acquisition end; thirdly, obtaining the difference value between the first voltage signal and the second voltage signal through comparison to judge whether a voltage drop amplitude value exists between the acquisition end and a load circuit; fourthly, controlling the acquisition end to output a first regulation voltage according to a first control state gain and controlling the acquisition end to output a second regulation voltage according to a second control state gain; fifthly, judging the difference value between the first regulation voltage and the second regulation voltage according to the first regulation voltage and the second regulation voltage to obtain a third voltage, wherein the third voltage is determined according to the voltage amplitude value proportion between the acquisition end and the load circuit.
Description
Technical field
The present invention relates to electric system electric power acquisition technology, in more specific words it, the embodiment of the present invention relates to a kind of power stage control method for electric system Acquisition Circuit.
Background technology
In conventional electric power acquisition system, the voltage collection circuit of acquisition terminal (such as ammeter) is generally adopt the modes such as divider resistance, electric capacity or Hall collection, the mode wherein adopting Hall to gather is comparatively quick, such as copper-manganese dividing potential drop mode, and shortcoming to be cost higher, and sample test price is higher, be difficult to accomplish voltage stabilization when meeting electrical isolation.Meanwhile, conventional Christmas mode adopts electromagnetic mode due to majority, therefore normally cannot estimate the loss of device power and stability, easily produce error and loss, therefore need to make improvement.
Summary of the invention
Technical scheme of the present invention solves aforementioned drawback, design a kind of collection terminal Poewr control method of electric system acquisition terminal, effectively gather the size of output quantity according to collection terminal (being generally copper-manganese acquisition mode) to AC power signal effectively to control the power stage of collection terminal circuit and to calculate, in one aspect, multiple switching state is arranged to this collection terminal circuit, and the control path corresponding with this multiple switching state, controlling mechanism is produced according to the corresponding relation between these control path, thus effectively judge and control and stablize the output power of described collection terminal, be convenient to the energy calculate of successive load circuit and control current/voltage signals collecting.
In order to solve aforementioned techniques defect, technical solution of the present invention is: the power stage control method of power collection systems comprises step: 1) obtain the first control voltage signal by testing circuit according to the current signal that collection terminal exports; 2) the second control voltage signal is obtained by described testing circuit according to the current signal that collection terminal exports; 3) difference between more described first control voltage signal and the second control voltage signal, judges whether there is pressure drop amplitude between collection terminal and load circuit with this; 4) control described collection terminal according to the first state of a control gain and export the first adjustment voltage, control described collection terminal according to the second state of a control gain again and export the second adjustment voltage; 5) according to the difference that described first adjustment voltage and the second adjustment voltage judge between the two, obtain the 3rd control voltage with this, wherein this 3rd control voltage decides according to the voltage magnitude ratio between described collection terminal and load circuit.
In a preferred embodiment, by arranging pass capacitor at described load circuit to carry out as a low-impedance device when duty is changed in the first control voltage and the second control voltage state at described collection terminal, and the difference that described first adjustment voltage and second is adjusted between voltage is only judged by the impedance of the electrical equipment between collection terminal and load circuit.
As improvement, described method comprises further: by the ratio Circuit tuning of in testing circuit, described voltage magnitude ratio is adjusted to one and falls proportional magnitude of voltage with the total head of load circuit.
As improvement, described method comprises further: produce state of a control gain to control the switching of the duty of described testing circuit between first and second control voltage signal by a solid states machine of described testing circuit.
As improvement, described method is come periodically to export control signal to power control circuit according to the state of a control gain signal of described solid states machine by the change-over switch connected between described collection terminal and power control circuit, wherein said change-over switch is by wire contacts to feedback amplifier, thus the input voltage that the dutycycle controlling collection terminal inputs in feedback amplifier with maintenance is constant.
In one embodiment, the resize ratio of described ratio Circuit tuning to described voltage magnitude meets relational expression:
V
DROP/(V
1-V
2)＝GAIN2/(GAIN2-GAIN1)，
Wherein V
1be the first control voltage, V
2be the second control voltage, V
dROPbe the 3rd control voltage, GAIN1 and GAIN2 is first, second state of a control gain that described solid states machine produces.
As improvement, receive first, second adjustment voltage by subtracter and produce the 3rd adjustment voltage, and receive first, second control voltage signal and produce difference between the two, this difference and the 3rd are adjusted voltage pass through an amplifier produce described in bucking voltage.
In another embodiment, the power control circuit based on the method is designed.According to previous embodiment, described testing circuit comprises a secondary testing circuit further, changes its output voltage to export one second adjustment voltage in order to keep in the first control voltage value and to control described collection terminal.
According to previous embodiment, described testing circuit comprises a ratio Circuit tuning further, falls proportional magnitude of voltage for described voltage magnitude ratio is adjusted to one with the total head of load circuit.
According to previous embodiment, described testing circuit comprises a hardware state machine further, for controlling the switching of the duty of described testing circuit between first and second control voltage signal.
The technique effect of the embodiment of the present invention is apparent, two magnitudes of voltage are tested by the impedance on loop between test collection terminal and load, calculate the amplitude proportion of voltage gain to compensate the feedback of voltage, voltage through accurate Calculation can carry out full remuneration to this total load voltage originally, to avoid loss in collection terminal and voltage fluctuation, and carry out the stop voltage upper limit by power control circuit.Meanwhile, circuit of the present invention can be in addition integrated as a chip, and circuit theory wherein also realizes miniaturization by the internal wiring of chip, is therefore worthy to be popularized.
Accompanying drawing explanation
The detailed technical scheme of the present invention by the mode detailed description in addition by referring to accompanying drawing, wherein:
Fig. 1 is the primary structure functional schematic block diagram of power collection systems of the present invention;
Fig. 2 is the primary structure schematic diagram of the function of the power collection systems based on Beidou navigation;
Fig. 3 is the principal functional structure electric diagram of power collection systems power output control circuit of the present invention.
Embodiment
With reference to Fig. 1, the embodiment of power collection systems of the present invention obtains public commodity consumption information for the acquisition terminal 600 be certainly arranged in different geographic location I, II, and by these information by list or the map view visual display in addition on a watch-dog 603 of stylizing, wherein said geographic location comprises known geographical area 801 and unknown geographic area 802, comprising: application data equipment 601, receives the public commodity consumption information from the acquisition terminal 600 in described known geographical area 801; Positioning equipment 602, determine that acquisition terminal in unknown geographic area 802 is to be located it according to the public commodity consumption information that application data equipment 601 obtains, wherein said positioning equipment 602 determines the locating information with the immediate acquisition terminal of described application data equipment 601 according to application data equipment 601 maximum signal level, and feeds back to application data equipment 601; Watch-dog 603, is connected to described positioning equipment 602 and described public commodity consumption information is associated between acquisition terminal corresponding separately.Public commodity consumption information is carried out corresponding with acquisition terminal (such as) device code by described association, thus the geographical location information of described acquisition terminal and device end are set up corresponding relation further, therefore can according to the locating information of acquisition terminal as the foundation obtained its energy consumption data.
As improvement, described application data equipment 601 is movable equipments, such as hand-held PDA or mobile phone, electric system operation maintenance personnel can stride across known geographical locations region 801 along desired trajectory W to A direction by Portable device 601, such as, thus according to wireless mode, GPRS or ZIGBEE reads the energy consumption image data of the acquisition terminal 600 in readable range contiguous with it.And for the acquisition terminal 600 in some uncertain region, due to some actual cause, the obstacle that such as geographic position travels or in excluding in electric administrative department validated user list with can unit, read requests signal is sent to the collecting device in zone of ignorance 802 by the acquisition terminal 600 in known region 801, if the feedback signal of receiving, then inform portable data device 601, thus be convenient to directly further to be communicated with it by equipment 601.In another embodiment, watch-dog 603 comprises output interface further, for carrying out visual display according to described association, the association in wherein said unknown geographic area 802 is according to being judged with associating in the immediate known geographical area 801 of this maximum signal level.
With further reference to Fig. 1, as improvement, power collection systems comprises Blast Furnace Top Gas Recovery Turbine Unit (TRT) 604 further, obtains power for operation by the electric network power line PL in described geographic location 801,802, and by inverter 605 to described public commodity feeding electric energy; Connect the public commodity energy storage device 606 of described Blast Furnace Top Gas Recovery Turbine Unit (TRT) 604, for collecting public commodity, wherein said acquisition terminal 600 connects described inverter 605 and public commodity energy storage device 606 respectively.Power distribution unit 607 is set between described public commodity energy storage device 606 and acquisition terminal 600, comprises main circuit breaker 617, connect described public commodity energy storage device 606 and control the supply of public commodity; Table case 627, for installing and fenced multiple acquisition terminal 600, wherein these acquisition terminals are controlled by described main circuit breaker 617; Collector 637, the multiple acquisition terminals 600 described in connection are to read public commodity consumption information, and wherein each acquisition terminal 600 connects riches all the way electric installation 604.In one embodiment, collector 637 is connected to aforementioned watch-dog 603 further with total energy data message of transmitting system, collector 637 and watch-dog 603, and is connected by wireless M-BUS mode with between acquisition terminal 600.
As improvement, described Blast Furnace Top Gas Recovery Turbine Unit (TRT) 604 is photovoltaic battery panel, is converted to electric energy to user in electrical network with powering by equipment by obtaining luminous energy (such as sun power).In a preferred example, described collector 637 is ammeter, the public commodity consumption information of other types is gathered by described ammeter, is sent in the electric power consumption information that integrated for public for collected other types commodity consumption information so far ammeter is gathered, wherein provided power for operation by public commodity energy storage device to the acquisition terminal gathering the public commodity consumption information of other types.Described public commodity comprise in electric energy, water energy, heat energy or rock gas one or combination, namely acquisition terminal 600 can be correspondingly one in ammeter, water meter, hotlist or gas meter or its etc. combination.
With reference to Fig. 2, design a kind of power collection systems based on triones navigation system in another embodiment, the client layer 100 be coupled by communication and Big Dipper communication transfer layer 200 form, wherein client layer 100 is provided with the public energy consumption load 3 of user and the acquisition terminal 600 be attached thereto, Big Dipper communication transfer layer 200 is provided with: positioning equipment 602, for locating described acquisition terminal 600; User commands machine 608, and it has the specialized protocol process chip of carrying out both-way communication with described acquisition terminal 600; And watch-dog 603, connect described user and command machine 608 to carry out electric power acquisition data monitoring, big-dipper satellite selected by wherein said positioning equipment 602, commands machine 608 to be connected by Big Dipper short message communication mode with described user.
Embodiment 1: with reference to Fig. 3, the power stage control method of power collection systems to collection terminal 2 comprises step:
1) current signal exported according to collection terminal 2 obtains the first control voltage signal V
1;
2) current signal exported according to collection terminal 2 obtains the second control voltage signal V
2, in the present invention is general, first, second control voltage signal V
1, V
2the ac signal gathered from electric network power line AC voltage/current can be chosen as;
3) more described first control voltage signal V
1with the second control voltage signal V
2between difference, judge whether there is pressure drop amplitude between collection terminal 2 and load circuit 3 with this.According to this pressure drop amplitude, can judge whether the power exporting load 3 from collection terminal 1 to changes further, such as, increase or reduce the generation of situation;
4) control described collection terminal 2 according to the first state of a control gain G AIN1 and export the first adjustment voltage V
oUT1, control described collection terminal according to the second state of a control gain G AIN2 again and export the second adjustment voltage V
oUT2; In the general embodiment of the present invention, gain can be on the occasion of/negative value, namely according to aforementioned increase or reduce situation and provide; By arranging solid-state/hardware state machine 4 to produce gain in testing circuit 1, control the switching of the duty of described testing circuit 1 between this first and second control voltage signal;
5) according to described first adjustment voltage V
oUT1with the second adjustment voltage V
oUT2judge difference between the two, obtain a 3rd control voltage V with this
dROP, according to this V
dROPcan judge should the voltage magnitude of redundancy or compensation and the size of performance number corresponding with it.Wherein this 3rd control voltage V
dROPdecide according to the voltage magnitude ratio between described collection terminal 1 and load circuit 3.In one embodiment, the resize ratio of described ratio Circuit tuning to described voltage magnitude meets relational expression:
V
DROP/(V
1-V
2)＝GAIN2/(GAIN2-GAIN1)，
Wherein V
1be the first control voltage, V
2be the second control voltage, V
dROPbe the 3rd control voltage, GAIN1 and GAIN2 is first, second state of a control gain that described solid states machine produces.
Acquisition terminal 600 includes described collection terminal 2, for connecting foreign current simulation signal generator to obtain current signal; Testing circuit 1, be coupled in described collection terminal 2 and pick out to load circuit 3, for exporting a modulation voltage according to control signal, wherein, being provided with further at testing circuit 1: the first sensing circuit, connecting described collection terminal 2 and current signal I for exporting according to collection terminal 2 obtains a first control voltage signal V1; Second sensing circuit, connects described collection terminal and current signal I for exporting according to collection terminal 2 obtains a second control voltage signal V2; Power control circuit, to be connected between first, second sensing circuit described and for by control voltage signal limiting in a values.
As the improvement of method described in embodiment 1, described testing circuit 1 design in order to: control described collection terminal 2 according to a first state of a control gain G AIN1 and export one first adjustment voltage V
oUT1; Control described collection terminal 2 according to a second state of a control gain G AIN2 (or transient state changes the output voltage of described collection terminal) again and export one second adjustment voltage V
oUT2.Further, described testing circuit 1 design in order to: according to described first adjustment voltage V
oUT1with the second adjustment voltage V
oUT2judge difference between the two, obtain a 3rd control voltage V with this
dROP, this voltage decides according to the voltage magnitude ratio (gain scale of such as 10% can be preset) between described collection terminal 2 and load circuit 3.Further, described testing circuit 1 design in order to: according to the first control voltage signal V1, utilize the 3rd control voltage V that obtains
dROPobtain a bucking voltage.
Wherein, by arranging pass capacitor at described load circuit 3 to carry out as a low-impedance device when duty is changed in the first control voltage and the second control voltage state at described collection terminal 1, and make described first adjustment voltage V
oUT1voltage V is adjusted with second
oUT2between difference only judged by the impedance of the electrical equipment between collection terminal 1 and load circuit 3.As shown in Figure 3, capacitor 42 is increased at the two ends of load 3, to ensure that the load current in load 3 presents level and smooth slope change.According to previous embodiment, described load bypass arranges capacitor 42, to make at described collection terminal 2 at the first control voltage V
1with the second control voltage V
2carry out under state as a low-impedance device when duty is changed, and make described first adjustment voltage V
oUT1voltage V is adjusted with second
oUT2between difference only by the impedance R of the electrical equipment between collection terminal 2 and load circuit 3
lINEor R
lOADjudge.
As the another improvement of method described in embodiment 1, described testing circuit 1 design in order to: obtain and detect first, second control voltage or impedance signal (such as by detecting the impedance loss R on load 3 loop
sENSEor R
lINEcarry out detection control voltage signal).
As the improvement of embodiment 1, described method comprises further: by the ratio Circuit tuning of in testing circuit 1, described voltage magnitude ratio is adjusted to one and falls proportional magnitude of voltage with the total head of load circuit 3.
As the further improvement of embodiment 1, described method comprises further: produce state of a control gain to control the switching of the duty of described testing circuit 1 between first and second control voltage signal by a solid states machine (such as DSP single-chip microcomputer) 4 of described testing circuit 1.As further improvement, described method is come periodically to export control signal to power control circuit according to the state of a control gain signal of described solid states machine 4 by the change-over switch S1 connected between described collection terminal 1 and power control circuit, wherein said change-over switch S1 is by wire contacts to feedback amplifier 46, thus the input voltage that the dutycycle controlling collection terminal 2 inputs in feedback operational amplifier 46 with maintenance is constant.
As the another improvement of method described in embodiment 1, receive described first, second adjustment voltage V by subtracter 68
oUT1and V
oUT2produce the 3rd adjustment voltage V
dROP, and receive first, second control voltage signal V
1and V
2produce difference between the two, this difference and the 3rd are adjusted voltage V
dROPbucking voltage described in being produced by an amplifying circuit (such as amplifier 75).Testing circuit 1 comprises a power control circuit (including sampling hold circuit 50,52,82,92,93 as shown in Figure 3) further, in order to temporary first control voltage value V
1, the second control voltage value V
2and control described collection terminal 2 and change its output voltage to export first, second adjustment voltage V
oUT1, V
oUT2.
The technology intention of embodiment 1 is now described for the circuit of Fig. 3.First change-over switch S1 is set, so just can be implemented in described first, switching between second sensing circuit, in the present invention, first, second sensing circuit is concrete mark or digital alphabet code name not, but by several components and parts, the mode that chip or alternate combinations use achieves and exports different voltage/current, and in the present invention, will be specifically described below: use a change-over switch S1, come periodically to export control signal to power control circuit according to the excitation gain signal of state machine 4 (such as a DSP singlechip equipment), such as use power modulated signal (PWM) waveform, at T
1in time cycle, be connected to a normal acquisition state, the collection electric current of collection terminal 2 and voltage are increased to stable state, gradually to provide a voltage V this moment
1to load 3 (namely provide one completely load current to load 3), embodiment in Fig. 1 provides a backfeed loop, in this case, collection terminal 2 adopts the actual constant output voltage in this output loop to produce a feedback voltage and realizes adjustment.Now switch S 1 passes through lead-in wire 22 contact to feedback amplifier 46, thus the input voltage that the dutycycle controlling collection terminal 2 inputs in feedback amplifier 46 with maintenance is constant.Such as, a capacitor (not showing) can be picked out on lead-in wire 22 and earth terminal guide wire is used as reference source.
At T
1under this normal condition, collection terminal 2 and the voltage on load 3 loop are amplified by differential amplifier 80, in order to gather this voltage, use a low values of resistors R
sENSE, by state machine 4 output gain driving source GAIN1, amplifier 80 exports the voltage V that represents load 3
oUT1.
Electric current I on loop 14,15
lOADreach steady-state current I
1after, state machine 4 controls sampling hold circuit 82 to store this V
oUT1numerical value (such as passing through register).Therefore can learn, V
oUT1=GAIN1I
1r
sENSE.Similarly, when the voltage on loop 14,15 reaches steady state voltage V
1after, state machine 4 controls another sampling hold circuit 50 to store this voltage V
1, now can judge V
1=V
lOAD+ (I
1r
lINE), wherein V
lOADfor the voltage at load 3 two ends, and R
lINEfor the total resistance value gone between on 14,15.
After above situation all meets, state machine 4 initializing circuit, contacts fling-cut switch S1 to differential amplifier 88, and state machine 4 exports a larger driving source GAIN2 to differential amplifier 80, makes amplifier 80 produce an output voltage V
oUT2, thus this backfeed loop to control collection terminal 2 constant with the voltage making differential amplifier 88 end and input, i.e. V
oUT1=V
oUT2.At I
lOADbe reduced to one and equal I
1(GAIN1/GAIN2), during value, can enough realize constant.The reduction of this output current causes the reduction of output voltage V2, thus V
2=V
lOAD+ (I
2r
lINE)=V
lOAD+ I
1(GAIN1/GAIN2) R
lINE.As output voltage V
2when reaching steady state voltage, output voltage V
2be stored in sampling hold circuit 52, now collection terminal does not export an adjustment voltage, and exports a bias voltage.
Further, V is produced by subtracter 68 (such as comparator circuit)
oUT1-V
oUT2, and produce V by subtracter 69
1-V
2, this voltage transmission is kept in sampling hold circuit 92,93.This V
oUT1-V
oUT2as a low voltage difference (according to aforementioned, the part composition of technical scheme of the present invention is low voltage difference by this being produced due to the small size curent change on loop 14,15 is compensated to realize collection terminal stable output to Acquisition Circuit), thus sampling hold circuit 92 can produce a driving source GAIN3, it meets foregoing relationships V
dROP/ (V
1-V
2)=GAIN2/ (GAIN2-GAIN1) (namely aforementioned in resize ratio), in order to the virtual voltage on full remuneration loop 14,15.
Voltage V on load circuit
dROPwith V
1-V
2by producing a standard of compensation source V after amplifier 75
rEF2, the output voltage of this standard of compensation source and collection terminal 2 is exported to subsequently and is fed back amplifier 46.This moment, state machine 4 controls again the output terminal that fling-cut switch S1 connects amplifier 46, and collection terminal 2 is in running order to ensure that output voltage meets V
rEF2, with the total voltage on compensating lead wire 14,15.Collection terminal 2 can specifically comprise the power control circuit being arranged at circuit two interpolar, is preferably a bidirectional transistor, or the photoelectric device such as controllable silicon, to limit the input voltage of collection terminal 2 not higher than 0.7V.
Concrete protection domain of the present invention is limited by claims, should understand, and should there be a lot of variation patterns on the basis of previous embodiment, all should be covered by this limited range.
Claims (7)
1. the power stage control method of power collection systems, is characterized in that comprising step: the current signal 1) exported according to collection terminal obtains the first control voltage signal; 2) current signal exported according to collection terminal obtains the second control voltage signal; 3) difference between more described first control voltage signal and the second control voltage signal, judges whether there is pressure drop amplitude between collection terminal and load circuit with this; 4) control described collection terminal according to the first state of a control gain and export the first adjustment voltage, control described collection terminal according to the second state of a control gain again and export the second adjustment voltage; 5) according to the difference that described first adjustment voltage and the second adjustment voltage judge between the two, obtain the 3rd control voltage with this, wherein this 3rd control voltage decides according to the voltage magnitude ratio between described collection terminal and load circuit.
2. the power stage control method of power collection systems according to claim 1, it is characterized in that: by arranging pass capacitor at described load circuit to carry out as a low-impedance device when duty is changed in the first control voltage and the second control voltage state at described collection terminal, and the difference that described first adjustment voltage and second is adjusted between voltage is only judged by the impedance of the electrical equipment between collection terminal and load circuit.
3. the power stage control method of power collection systems according to claim 1, is characterized in that comprising further: by the ratio Circuit tuning of in testing circuit, described voltage magnitude ratio is adjusted to one and falls proportional magnitude of voltage with the total head of load circuit.
4. the power stage control method of power collection systems according to claim 1, is characterized in that comprising further: produce state of a control gain to control the switching of the duty of described testing circuit between first and second control voltage signal by a solid states machine of described testing circuit.
5. the power stage control method of power collection systems according to claim 4, it is characterized in that: come periodically to export control signal to power control circuit according to the state of a control gain signal of described solid states machine by the change-over switch connected between described collection terminal and power control circuit, wherein said change-over switch is by wire contacts to feedback amplifier, thus the input voltage that the dutycycle controlling collection terminal inputs in feedback amplifier with maintenance is constant.
6. the power stage control method of power collection systems according to claim 5, is characterized in that: the resize ratio of described ratio Circuit tuning to described voltage magnitude meets relational expression:
V
DROP/(V
1-V
2)＝GAIN2/(GAIN2-GAIN1)，
Wherein V
1be the first control voltage, V
2be the second control voltage, V
dROPbe the 3rd control voltage, GAIN1 and GAIN2 is first, second state of a control gain that described solid states machine produces.
7. the power stage control method of the power collection systems according to claim 1 and 2, it is characterized in that: receive first, second adjustment voltage by subtracter and produce the 3rd adjustment voltage, and receive first, second control voltage signal and produce difference between the two, this difference and the 3rd are adjusted voltage pass through an amplifier produce described in bucking voltage.
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| CN103698578A (en) * | 2013-12-26 | 2014-04-02 | 浙江华立科技有限公司 | Power output control method of automatic electric power meter reading system and automatic electric power meter reading system |
| CN204179731U (en) * | 2014-11-28 | 2015-02-25 | 国家电网公司 | Support the distribution line on-line monitoring acquisition terminal of circuit automatic electricity getting |
| CN204190499U (en) * | 2014-11-28 | 2015-03-04 | 国家电网公司 | Support the distribution line on-line monitoring acquisition terminal of solar energy power taking |
-
2015
- 2015-03-16 CN CN201510114259.3A patent/CN104898757A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101800915A (en) * | 2009-12-30 | 2010-08-11 | 国网信息通信有限公司 | Substation, terminal and system for collecting information of electricity consumption |
| CN103698578A (en) * | 2013-12-26 | 2014-04-02 | 浙江华立科技有限公司 | Power output control method of automatic electric power meter reading system and automatic electric power meter reading system |
| CN204179731U (en) * | 2014-11-28 | 2015-02-25 | 国家电网公司 | Support the distribution line on-line monitoring acquisition terminal of circuit automatic electricity getting |
| CN204190499U (en) * | 2014-11-28 | 2015-03-04 | 国家电网公司 | Support the distribution line on-line monitoring acquisition terminal of solar energy power taking |
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Application publication date: 20150909 |