CN106597087A - Power collection circuit having load voltage complete-compensation function and method - Google Patents
Power collection circuit having load voltage complete-compensation function and method Download PDFInfo
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- CN106597087A CN106597087A CN201510677099.3A CN201510677099A CN106597087A CN 106597087 A CN106597087 A CN 106597087A CN 201510677099 A CN201510677099 A CN 201510677099A CN 106597087 A CN106597087 A CN 106597087A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
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Abstract
The invention discloses a power collection circuit having the voltage limiting function and a method and belongs to the field of the power collection technology for a power system. Through testing the impedance of a loop between a test collection end and a load, two voltage values are tested. After that, the feedback on the compensation voltage is conducted through calculating the amplitude ratio of the voltage gain. The original total load voltage is completely compensated by the precisely calculated voltage, so that the loss and the voltage fluctuation of the test collection end can be avoided. Meanwhile, the upper limit of the voltage is limited by a voltage-limiting circuit. The power collection circuit having the voltage limiting function comprises a collection end and a detection circuit. The detection circuit further comprises a first sensing circuit and a second sensing circuit, wherein the two circuits are connected with the collection end and are used for obtaining a first voltage signal and a second voltage signal according to current signals outputted by the collection end. The collection end further comprises a voltage-limiting circuit connected between the first sensing circuit and the second sensing circuit and used for limiting voltage signals within a predetermined value range.
Description
Technical field
The present invention relates to power system electric power acquisition technology, in more specific words it, the present embodiments relate to a kind of power harvesting circuit and load voltage full compensation method that function is fully compensated with load voltage.
Background technology
The voltage collection circuit of conventional ammeter is usually using modes such as divider resistance, electric capacity or Hall collections, it is wherein more quick by the way of Hall collection, such as copper-manganese partial pressure mode, and have the disadvantage relatively costly, and sample test price is higher, it is difficult to accomplish voltage stabilization in the case where electrical isolation is met, it is therefore desirable to make improvement.
The content of the invention
For the deficiencies in the prior art part, the present invention provides a kind of power harvesting circuit and load voltage full compensation method that function is fully compensated with load voltage.The power harvesting circuit includes collection terminal, for connecting foreign current simulation signal generator to obtain current signal；Detection circuit, is coupled in the collection terminal and picks out to load circuit, for exporting a modulation voltage according to control signal, wherein, the detection circuit is further provided with：First sensing circuit, connects the collection terminal and for the current signal exported according to collection terminal obtaining a first voltage signal；Second sensing circuit, connects the collection terminal and for the current signal exported according to collection terminal obtaining a second voltage signal；The collection terminal is further provided with：Pressure limiting circuit, is connected between first, second sensing circuit and for voltage signal to be limited in a values.
In one embodiment, capacitor is set in the bypass of the load circuit, so that as a low-impedance device when collection terminal is operated State Transferring under first voltage signal and second voltage signal condition.
In one embodiment, the detection circuit further includes a secondary detection circuit, is configured to temporarily store first voltage value and one first adjustment voltage, and controls the collection terminal and changes its output voltage to export second voltage value and one second adjustment voltage.
In one embodiment, the detection circuit further includes a ratio adjustment circuit, and proportional magnitude of voltage is dropped with the total head of load circuit for the voltage difference ratio of described first voltage signal and second voltage signal to be adjusted to into one.
In one embodiment, the detection circuit further includes a hardware state machine, for controlling the switching of working condition of the detection circuit between first and second voltage signal.
The load voltage full compensation method of power harvesting circuit, comprises the following steps：
Under first voltage signal condition, by detecting the current signal that exports according to collection terminal of circuit a first voltage signal is obtained；Under second voltage signal condition, a second voltage signal is obtained by the current signal that exports according to collection terminal of detection circuit；Difference between the comparison first voltage signal and second voltage signal, judges to whether there is pressure drop amplitude between collection terminal and load circuit with this；The collection terminal is controlled according to a first controlled state voltage and exports one first adjustment voltage；And the collection terminal is controlled according to a second controlled state voltage and exports one second adjustment voltage；According to the described first adjustment voltage and the second adjustment voltage, judge the first voltage signal and second voltage signal difference between the two, obtain a tertiary voltage with this, wherein this tertiary voltage is determining according to the voltage magnitude ratio between collection terminal and load circuit；According to the first voltage signal, an offset voltage is obtained using the resulting tertiary voltage.
In one embodiment, the measurement circuit design to：Obtain and detect the mat woven of fine bamboo strips one, second voltage signal.
In one embodiment, the measurement circuit design to：The collection terminal is controlled according to a first controlled state voltage and exports one first adjustment voltage；Again according to a second controlled state voltage（Or transient state changes the output voltage of the collection terminal）One second adjustment voltage is exported to control the collection terminal.
In another embodiment, the measurement circuit design to：According to the described first adjustment voltage and the second adjustment voltage, judge the first voltage signal and second voltage signal difference between the two, obtain a tertiary voltage with this, this tertiary voltage is determining according to the voltage magnitude ratio between collection terminal and load circuit.
In one embodiment, the measurement circuit design to：According to first voltage signal, an offset voltage is obtained using resulting tertiary voltage.
According to previous embodiment, capacitor is set in the load bypass, so that as a low-impedance device when collection terminal is operated State Transferring under first voltage signal and second voltage signal condition, and the difference between the first adjustment voltage and the second adjustment voltage is only judged by the impedance of the electrical equipment between collection terminal and load circuit.
Having the technical effect that for the embodiment of the present invention is obvious, two magnitudes of voltage are tested by testing the impedance between collection terminal and load on loop, calculate the amplitude proportion of voltage gain to compensate the feedback of voltage, the total load voltage of this script can be fully compensated through the accurate voltage for calculating, loss and voltage pulsation in avoid collection terminal, and by pressure limiting circuit come the stop voltage upper limit.Meanwhile, circuit of the present invention can be in addition integrated as a chip, and circuit theory therein also can realize miniaturization by the internal wiring of chip, therefore be worthy to be popularized.
Description of the drawings
The detailed technical scheme of the present invention is by by referring to the in addition detailed description of the mode of accompanying drawing.Accompanying drawing is, for providing a further understanding of the present invention, and to constitute the part of description, is used to explain the present invention together with detailed description below, but is not construed as limiting the invention.
Fig. 1 is the principal functional structure electric diagram of circuit of the present invention；
Fig. 2 is the partial circuit schematic diagram of collection terminal in circuit of the present invention.
Specific embodiment
With reference to Fig. 1, a kind of power harvesting circuit that function is fully compensated with load voltage, including collection terminal 2, for connecting foreign current simulation signal generator to obtain current signal；Detection circuit 1, is coupled in the collection terminal 2 and picks out to load circuit 3, for exporting a modulation voltage according to control signal, wherein, detection circuit 1 is further provided with：First sensing circuit, connects the collection terminal 2 and for the current signal I exported according to collection terminal 2 obtaining a first voltage signal Vl；Second sensing circuit, connects the collection terminal and for the current signal I exported according to collection terminal 2 obtaining a second voltage signal V2；Collection terminal 2 is further provided with：Pressure limiting circuit Dl, is connected between first, second sensing circuit and for voltage signal to be limited in a values.
In one embodiment, the measurement circuit design to：First, second signal is obtained and detects, such as by the impedance loss RSENSE or RLINE on 3 loops of detection load come detectable voltage signals.
In one embodiment, the measurement circuit design to：The collection terminal 2 is controlled according to a first controlled state voltage GAIN1 and exports one first adjustment voltage VOUTl；Again according to a second controlled state voltage GAIN2（Or transient state changes the output voltage of the collection terminal）One second adjustment voltage VOUT2 is exported to control the collection terminal 2.
In another embodiment, the detection circuit 1 is designed to：According to the described first adjustment voltage VOUT1 and the second adjustment voltage VOUT2, to judge first voltage signal Vl and first voltage signal V2 difference between the two, a tertiary voltage GAIN3 is obtained with this, this voltage is according to the voltage magnitude ratio between the collection terminal 2 and load circuit 3（Such as 10% gain scale, can preset）Come what is determined.
In one embodiment, the detection circuit 1 is designed to：According to first voltage signal Vl, an offset voltage is obtained using resulting tertiary voltage GAIN3.
According to previous embodiment, the detection circuit 1 further includes a secondary detection circuit,（Sampling hold circuit 50,52,82,92 such as in figure, the connected mode between them is as depicted in Fig. 1）, first voltage value Vl and one first adjustment voltage VOUT1 are configured to temporarily store, and its output current of change of the collection terminal 2 is controlled to export second voltage value V2 and one second adjustment voltage VOUT2.
According to previous embodiment, the detection circuit 1 further includes a ratio adjustment circuit, is adjusted to one for the voltage difference ratio by described first voltage signal Vl and first voltage signal V2 between the two and proportional magnitude of voltage is dropped with the total head of load circuit.
According to previous embodiment, the detection circuit further includes a hardware state machine 4, for controlling the switching of working condition of the detection circuit between first and second voltage signal.
The load voltage full compensation method of power harvesting circuit, comprises the following steps：
Under first voltage signal condition, by detecting the current signal that exports according to collection terminal of circuit a first voltage signal V1 is obtained；Under second voltage signal condition, a second voltage signal V2 is obtained by the current signal that exports according to collection terminal of detection circuit；Difference between the comparison first voltage signal and second voltage signal, judges to whether there is pressure drop amplitude between collection terminal and load circuit with this；The collection terminal is controlled according to a first controlled state voltage GANI1 and exports one first adjustment voltage VOUT1；And the collection terminal is controlled according to a second controlled state voltage GAIN2 and exports one second adjustment voltage VOUT2；According to the described first adjustment voltage VOUT1 and the second adjustment voltage VOUT2, judge the first voltage signal V1 and second voltage signal V2 differences between the two, obtain a tertiary voltage GAIN3 with this, wherein this tertiary voltage is determining according to the voltage magnitude ratio between collection terminal 2 and load circuit 3；According to first voltage signal V1, an offset voltage is obtained using resulting tertiary voltage GAIN3.
The technology that this technical scheme is described by taking the circuit of Fig. 1 as an example is intended to.Switching switch Sl is set first, the switching between first, second sensing circuit can be thus realized.In the present invention, first, second sensing circuit does not have specific labelling or digital alphabet code name, but the different voltage/currents of output are realized by way of several components and parts, chip or alternate combinations are used, and in the present invention, will be specifically described below：
Because having used switching switch Sl, then need state machine 4（Such as one DSP singlechip equipment）Carry out periodically output control signal, such as within the Tl time cycles, be connected to a normal acquisition state, this moment the collection electric current and voltage of collection terminal 2 is gradually risen to stable state, to provide a voltage Vl to load 3（I.e. provide one completely load current to load 3）, embodiment in Fig. 1 provides a feedback circuit, in this case, collection terminal 2 using this output loop in actual constant output voltage adjustment is realized to produce a feedback voltage.Now switch Sl to contact to feedback amplifier 46 by lead 22, so as to control the dutycycle of collection terminal 2 to keep input constant to the input voltage in feedback amplifier 46.For example, a capacitor can be picked out on lead 22（Do not show）And earth terminal guide wire is used as a reference source.
Under Tl this normal condition, difference amplifier 80 is amplified collection terminal 2 with a voltage on 3 loops of load, in order to gather this voltage, using low values of resistors RSENSE, one driving source × GAIN1 is exported by state machine 4, amplifier 80 exports a voltage VOUT1 for representing 3 electric currents of load.
After electric current ILOAD on loop 14,15 reaches steady-state current Il, hardware state machine 4 controls sampling hold circuit 82 to store the numerical value of this VOUT1（For example stored by depositor）.Therefore it is known that VOUTl=GAIN1 × Il × RSENSE.
Similarly, after the voltage on loop 14,15 reaches steady state voltage Vl. state machine 4 controls another sampling hold circuit 50 to store this voltage Vl, now may determine that Vl=VLOAD+ (Il × RLINE), wherein VLOAD is the voltage for loading 3 two ends, and RLINE is the total resistance value on lead 14,15.
After case above all meets, the initializing circuit of hardware state machine 4, fling-cut switch Sl is contacted to difference amplifier 88, and state machine 4 exports a bigger driving source GAIN2 to difference amplifier 80, so that amplifier 80 produces output voltage VO UT2, so as to this feedback circuit control collection terminal 2 so that the voltage of the end of difference amplifier 88 input is constant, i.e. VOUT1=VOUT2.When ILOAD is reduced to the value that is equal to Il × (GAINl/GAIN2), just can realize constant.The reduction of this output current causes the reduction of output voltage V2, so as to V2=VLOAD+ (I2 × RLINE)=VLOAD+Il × (GAINl/GAIN2) × RLINE.When output voltage V2 reaches steady state voltage, output voltage V2 is stored in sampling hold circuit 52, and now collection terminal does not export an adjustment voltage, and exports a bias voltage.
By subtractor（Such as comparison circuit）68 produce Vl-V2, this voltage is transferred to into sampling hold circuit 92 and is kept in.According to aforementioned, the part composition of technical scheme is that, by the way that the output that this low voltage difference produced due to the small size curent change on loop 14,15 is compensated for realize collection terminal to Acquisition Circuit is stablized, it is poor that this Vl-V2 is described low voltage as a low voltage difference.Sampling hold circuit 92 can produce a driving source GATN3, i.e., described tertiary voltage, and it is equal to VDROP/ (V1-V2)=GAIN2/ (GAIN2-GAINl)（Adjustment ratio in i.e. aforementioned）, the virtual voltage on loop 14,15 is fully compensated.
Described tertiary voltage GATN3 and a benchmark floats 74（Voltage magnitude is VREF1）A standard of compensation source VREF2 is produced by being added after adder 75, this standard of compensation source subsequently exports with the output voltage of collection terminal 2 and gives feedback amplifier 46.This moment, state machine 4 controls the outfan that fling-cut switch Sl connects amplifier 46 again, and collection terminal 2 is in running order to ensure that output voltage meets VREF2, with the total voltage on compensating lead wire 14,15.
As shown in Figure 1, increase capacitor 42 at the two ends of load 3, smooth slope change is presented with the load current ensured in load 3.According to previous embodiment, capacitor 42 is set in the load bypass, so that when the collection terminal 2 is operated State Transferring under first voltage and second voltage state as a low-impedance device, and the difference between the first adjustment voltage and the second adjustment voltage is only judged by the impedance RLINE or RLOAD of the electrical equipment between collection terminal and load circuit.
Fig. 2 further shows in detail collection terminal 2, wherein specifically including being arranged at the photoelectric devices such as the pressure limiting circuit Dl of circuit I+ and the interpolars of I- two, preferably one bidirectional transistor, or controllable silicon, with the input voltage for limiting collection terminal 2 0.7V is not higher than.
The concrete protection domain of the present invention is limited by claims, it should be appreciated that should have many variation patterns on the basis of previous embodiment, all should be covered by the range of this restriction.
Claims (6)
1. a kind of power harvesting circuit that function is fully compensated with load voltage, including collection terminal, for connecting foreign current simulation signal generator to obtain current signal；Detection circuit, is coupled in the collection terminal and picks out to load circuit, for exporting an offset voltage according to control signal, it is characterised in that：The detection circuit is further provided with：First sensing circuit, connects the collection terminal and for the current signal exported according to collection terminal obtaining a first voltage signal；Second sensing circuit, connects the collection terminal and for the current signal exported according to collection terminal obtaining a second voltage signal；The collection terminal is further provided with：Pressure limiting circuit, is connected between first, second sensing circuit and for voltage signal to be limited in a values.
2. it is according to claim 1 it is a kind of with load voltage be fully compensated function power harvesting circuit, it is characterised in that：Capacitor is set in the bypass of the load circuit, so that when the collection terminal is operated State Transferring under the first voltage signal and second voltage signal condition as a low-impedance device.
3. it is according to claim 1 it is a kind of with load voltage be fully compensated function power harvesting circuit, it is characterised in that：The detection circuit further includes a hardware state machine, for controlling working condition switching of the detection circuit between described first and second voltage signal.
4. it is according to claim 1 it is a kind of with load voltage be fully compensated function power harvesting circuit, it is characterised in that：The detection circuit further includes a ratio adjustment circuit, and proportional magnitude of voltage is dropped with the total head of load circuit for the voltage difference ratio of the first voltage signal and second voltage signal to be adjusted to into one.
5. it is according to claim 1 it is a kind of with load voltage be fully compensated function power harvesting circuit, it is characterised in that：The detection circuit further includes a secondary detection circuit, is configured to temporarily store the first voltage signal and one first adjustment voltage, and controls the collection terminal and changes its output current to export the second voltage signal and one second adjustment voltage.
6. the load voltage full compensation method of power harvesting circuit, it is characterised in that including step：
Under first voltage signal condition, by detecting the current signal that exports according to collection terminal of circuit a first voltage signal is obtained；Under second voltage signal condition, a second voltage signal is obtained by the current signal that exports according to collection terminal of detection circuit；Difference between the comparison first voltage signal and second voltage signal, judges to whether there is pressure drop amplitude between the collection terminal and load circuit with this；The collection terminal output the first adjustment voltage is controlled according to a first controlled state voltage；And the collection terminal output the second adjustment voltage is controlled according to a second controlled state voltage；According to the described first adjustment voltage and the second adjustment voltage, judge the first voltage signal and second voltage signal difference between the two, obtain a tertiary voltage with this, wherein this tertiary voltage is determining according to the voltage magnitude ratio between collection terminal and load circuit；According to the first voltage signal, an offset voltage is obtained using resulting tertiary voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510677099.3A CN106597087A (en) | 2015-10-20 | 2015-10-20 | Power collection circuit having load voltage complete-compensation function and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510677099.3A CN106597087A (en) | 2015-10-20 | 2015-10-20 | Power collection circuit having load voltage complete-compensation function and method |
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| CN106597087A true CN106597087A (en) | 2017-04-26 |
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| CN201510677099.3A Pending CN106597087A (en) | 2015-10-20 | 2015-10-20 | Power collection circuit having load voltage complete-compensation function and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022170528A1 (en) * | 2021-02-09 | 2022-08-18 | 华为技术有限公司 | Voltage fluctuation compensation method and compensation circuit |
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| CN101882369A (en) * | 2010-07-01 | 2010-11-10 | 福州亿力电力通信信息有限公司 | Remote real-time monitoring system for electric power system client side meter |
| CN103048537A (en) * | 2012-12-27 | 2013-04-17 | 北京唯绿建筑节能科技有限公司 | Building electricity itemized metering device |
| 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 |
| CN203688663U (en) * | 2014-01-07 | 2014-07-02 | 长沙威胜信息技术有限公司 | Power collection system |
| CN203981795U (en) * | 2014-06-18 | 2014-12-03 | 常州纺织服装职业技术学院 | A kind of power acquirer |
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2015
- 2015-10-20 CN CN201510677099.3A patent/CN106597087A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101882369A (en) * | 2010-07-01 | 2010-11-10 | 福州亿力电力通信信息有限公司 | Remote real-time monitoring system for electric power system client side meter |
| CN103048537A (en) * | 2012-12-27 | 2013-04-17 | 北京唯绿建筑节能科技有限公司 | Building electricity itemized metering device |
| 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 |
| CN203688663U (en) * | 2014-01-07 | 2014-07-02 | 长沙威胜信息技术有限公司 | Power collection system |
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| WO2022170528A1 (en) * | 2021-02-09 | 2022-08-18 | 华为技术有限公司 | Voltage fluctuation compensation method and compensation circuit |
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