CN111175685A - Automatic power compensation calibration tool and calibration method - Google Patents
Automatic power compensation calibration tool and calibration method Download PDFInfo
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- CN111175685A CN111175685A CN202010060044.9A CN202010060044A CN111175685A CN 111175685 A CN111175685 A CN 111175685A CN 202010060044 A CN202010060044 A CN 202010060044A CN 111175685 A CN111175685 A CN 111175685A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
- G01R21/001—Measuring real or reactive component; Measuring apparent energy
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/16—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
- H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
- H02J3/1864—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein the stepless control of reactive power is obtained by at least one reactive element connected in series with a semiconductor switch
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The invention discloses an automatic power compensation calibration tool and a calibration method in the field of power compensation calibration, which can solve the technical problems of long visual angle, complex operation and influence on production efficiency caused by manual adjustment of capacitance compensation parameters. The system comprises a track signal acquisition unit, a local signal acquisition unit and a digital signal processing unit, wherein the digital signal processing unit is coupled with the output ends of the track signal acquisition unit and the local signal acquisition unit, and calculates compensation parameters according to acquisition values of the track signal acquisition unit and the local signal acquisition unit; the power compensation unit comprises an execution unit and a compensation unit which are connected, the execution unit is connected with the digital signal processing unit, and the compensation unit is respectively connected with the track signal input unit and the track output unit. The invention puts in the reactive compensation power in a closed loop mode, realizes the calibration work of multiple modules under the condition of very small input current, improves the waveform quality during calibration, saves the time cost and improves the cost performance of products.
Description
Technical Field
The invention relates to the field of power compensation calibration, in particular to an automatic power compensation calibration tool and a calibration method.
Background
The 25Hz phase-sensitive track circuit electronic receiver can generate voltage and phase difference deviation under the influence of temperature and channel inertia in the working process due to the factors of hardware characteristics; therefore, in the production and debugging process, the voltage, phase delay parameters and the like with different temperature levels need to be pre-calibrated.
Because the interface characteristic of the 25Hz phase-sensitive track circuit electronic receiver and the track circuit presents larger sensitivity, when a plurality of electronic receivers are calibrated together, the inductive load is increased along with the increase of the calibrated electronic receivers, so that the sine wave output signal of a 25Hz signal source generates larger distortion, the input and output function of the calibrated 25Hz phase-sensitive track circuit electronic receiver generates difference with the sine wave signal sampled by the practically applied 25Hz track circuit, and therefore, extra detection error is added to the sampling of the 25Hz track signal. Meanwhile, with the increase of the inductive load of the calibration load and the reduction of the power factor, the output reactive power of the 25Hz signal source is increased, and the number of electronic receivers of the phase-sensitive track circuit driven by the signal source and calibrated at 25Hz is reduced. And along with the change of the number of the calibrated load electronic receivers, the capacitance parameters participating in compensation also change synchronously, and the compensation capacitance parameters need to be adjusted at any time according to the change of the number of the calibrated modules.
In view of the fact that an electronic receiver of a 25Hz phase-sensitive track circuit participating in calibration needs to be calibrated under different voltage and temperature levels, the visual angle for manually adjusting capacitance compensation parameters is long, so that the time of the calibration process is prolonged, the operation is complicated, the production efficiency is greatly influenced, automatic feedback compensation needs to be carried out on 25Hz signal source output, the sine wave distortion phenomenon is corrected, and extra detection errors caused by waveform distortion of 25Hz output signals are eliminated.
Disclosure of Invention
The invention aims to provide an automatic power compensation calibration tool and a calibration method, which can solve the technical problems that the calibration process time is prolonged, the operation is complicated and the production efficiency is influenced due to the fact that the visual angle for manually adjusting capacitance compensation parameters is long.
In order to achieve the purpose, the invention provides the following technical scheme:
an automatic power compensation calibration tool comprises a track signal acquisition unit, wherein the input end of the track signal acquisition unit is connected with a track signal; the input end of the local signal acquisition unit is connected with the local signal; the digital signal processing unit is coupled with the output ends of the track signal acquisition unit and the local signal acquisition unit and calculates compensation parameters according to the acquisition values of the track signal acquisition unit and the local signal acquisition unit; the power compensation unit comprises an execution unit and a compensation unit which are connected, the execution unit is connected with the digital signal processing unit, and the compensation unit is respectively connected with the track signal input unit and the track output unit.
As an improved scheme of the present invention, in order to further facilitate the acquisition of voltage, current, and frequency parameters of the track signal, the track signal acquisition unit includes a track signal input unit accessing the track signal, and further includes a track signal voltage conditioning unit, a track signal current conditioning unit, and a track signal frequency detection unit respectively connected to the track signal input unit and the digital signal processing unit.
As an improved scheme of the invention, in order to further facilitate connection and acquisition of a track signal, the track signal input unit comprises a hall sensor, a transformer T1 and a sampling resistor R2, the hall sensor is connected to a track signal zero line, two ends of a primary winding of the transformer T1 are respectively connected with the hall sensor and a live wire of the track signal, and a secondary winding of the transformer T1 is connected to the track signal voltage conditioning unit after being connected in parallel with the sampling resistor R2; and the track signal frequency detection unit and the track output unit are also connected in parallel between the live wire of the track signal and the Hall sensor.
As an improved scheme of the invention, in order to further acquire track signal current parameters, the track signal current conditioning unit includes an operational amplifier U1, a first input end of the operational amplifier U1 is connected with a resistor R3, a second input end of the operational amplifier U1 is connected with a resistor R4 and then grounded, an output end of the operational amplifier U4 is connected with a resistor R6, the resistor R3 is connected with the hall sensor, a resistor R6 is respectively connected with the digital signal processing unit and a capacitor C1, and a resistor R5 is connected between the first input end and the output end of the operational amplifier U1.
As an improved scheme of the present invention, in order to further collect rail signal voltage parameters, the rail signal voltage conditioning unit includes an operational amplifier U2, a first input end of the operational amplifier U2 is connected to a resistor R7, a second input end of the operational amplifier U2 is connected to the ground after being connected to a resistor R8, an output end of the operational amplifier U2 is connected to a resistor R10, the resistor R7 is connected to a secondary winding of the transformer T1, the resistors R10 are respectively connected to the digital signal processing unit and the capacitor C2, and a resistor R9 is connected between the first input end and the output end of the operational amplifier U2.
As an improved scheme of the invention, in order to further acquire track signal frequency parameters, the track signal frequency detection unit comprises an isolation optocoupler U3, one end of the isolation optocoupler U3 light emitter is connected in series with a resistor R11 and then is connected to the track signal input unit, a diode D2 is further connected between two ends of the isolation optocoupler U3 light emitter, one end of the light receiver is grounded, the other end of the light receiver is respectively connected with a pull-up resistor R12 and an input end of an inverter U4, the pull-up resistor R12 is connected to a power supply, and an output end of the inverter U4 is connected with the digital signal processing unit.
As an improved scheme of the present invention, in order to further acquire local signal frequency parameters, the local signal acquisition unit includes a local input unit and a local signal frequency detection unit, the local signal frequency detection unit includes an isolation optocoupler U5, one end of the isolation optocoupler U5 light emitter is connected in series with a resistor R13 and then is connected to the local input unit, a diode D3 is further connected between two ends of the isolation optocoupler U5 light emitter, one end of the light receiver is grounded, and the other end of the light receiver is respectively connected to a resistor R14 and an input end of an inverter U6, the resistor R14 is connected to a power supply, and an output end of the inverter U6 is connected to the digital signal processing unit.
As an improved scheme of the present invention, in order to further facilitate the adjustment of the number of the adjusting units for the implementation compensation of the executing unit, the executing unit includes at least two groups of adjusting units, the adjusting unit includes an optical coupler, one end of the optical coupler is connected to the digital signal processing unit, and the other end is connected to the power supply after being connected in series with the current limiting resistor; one end of the optical coupler light receiver is grounded, and the other end of the optical coupler light receiver is connected with the relay coil and then is connected with a power supply.
As an improved scheme of the invention, in order to further facilitate fine adjustment of the compensated track signal, the compensation unit comprises capacitors with the number corresponding to that of the adjustment units, the capacitors are connected with the normally open contacts of the relays and are arranged at two ends of the equivalent inductor, and two ends of the equivalent inductor are further connected with the track signal input unit.
A calibration method of an automatic power compensation calibration tool comprises the following steps:
s1: the track signal acquisition unit detects actual power consumption parameter data of a calibration load;
s2: the digital signal processing unit compares actual power consumption parameter data of the calibration load with residual data of a single calibration module to obtain the number of the actual calibration modules and preset compensation parameters;
s3: the digital signal processing unit outputs signals, and the execution unit inputs compensation capacity according to preset compensation parameters;
s4: the track signal acquisition unit acquires compensated power consumption parameter data of the calibration load in real time, and the digital signal processing unit compares the compensated power consumption parameter data acquired by the local signal acquisition unit to obtain a deviation value;
s5: the digital signal processing unit outputs signals, and the compensation unit inputs compensation capacity according to the deviation value;
s7: and repeating the steps S4-S5 until the deviation value obtained by the digital signal processing unit is within the preset range.
Has the advantages that: the invention puts in the reactive compensation power in a closed loop mode, realizes the calibration work of multiple modules under the condition of very small input current, improves the waveform quality during calibration, saves the time cost and improves the cost performance of products.
Drawings
FIG. 1 is an overall block diagram of the present invention;
FIG. 2 is an internal block diagram of the power conversion unit of the present invention;
FIG. 3 is an internal block diagram of a track signal input unit according to the present invention;
FIG. 4 is an internal block diagram of the track signal current conditioning unit of the present invention;
FIG. 5 is an internal block diagram of the track signal voltage conditioning unit of the present invention;
FIG. 6 is an internal block diagram of a track signal frequency detection unit according to the present invention;
FIG. 7 is an internal block diagram of a local signal frequency detection unit according to the present invention;
FIG. 8 is an internal block diagram of an execution unit of the present invention;
FIG. 9 is an internal block diagram of the power compensation unit of the present invention;
in the figure: 1-a power conversion unit; 11-a first stage power conversion unit; 12-a second stage power conversion unit; 2-local signal acquisition unit; 21-a local input unit; 22-local signal frequency detection unit; 3-a track signal acquisition unit; 31-a track signal input unit; 32-a track signal current conditioning unit; 33-a track signal voltage conditioning unit; 34-a track signal frequency detection unit; 4-a power compensation unit; 41-an execution unit; 42-a compensation unit; 5-a local output unit; 51-local output and control _ 1; 52-local output and control _ 2; 53-local output and control _ 3; 54-local output and control-4; 55-local output and control _ 5; 6-track output unit; 61-track output and control _ 1; 62-track output and control _ 2; 63-track output and control _ 3; 64-track output and control _ 4; 65-track output and control _ 5; 7-a communication unit; 8-digital signal processing unit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The calibration tool of the embodiment is powered by the power conversion unit 1, and the power conversion unit 1 includes a first-stage power conversion unit 11 and a second-stage power conversion unit 12. As shown in fig. 2, the input 24VDC is first connected to the first stage power conversion unit through a diode D1 and is converted into 5VDC, and the first stage power conversion unit 11 supplies power to a part of units of the calibration tool through a DC/DC output, where the input and the output are isolated; the first-stage power conversion unit 11 simultaneously outputs the power to the second-stage power conversion unit 12, 5VDC is converted into 3.3VDC, and the power is output to each unit of the calibration tool for power supply.
In this embodiment, the track signal acquisition unit 3 includes a track signal input unit 31 for accessing a track signal, and further includes a track signal voltage conditioning unit 33, a track signal current conditioning unit 32, and a track signal frequency detection unit 34 respectively connected to the track signal input unit 31 and the digital signal processing unit 8.
In this embodiment, as shown in fig. 3, the track signal input unit 31 includes a hall sensor, a transformer T1, and a sampling resistor R2, the hall sensor is connected to a zero line of the track signal, two ends of a primary winding of the transformer T1 are respectively connected to the hall sensor and a live line of the track signal, and a secondary winding of the transformer T1 is connected to the track signal voltage conditioning unit 33 after being connected in parallel with the sampling resistor R2; a track signal frequency detection unit 34 and a track output unit 6 are also connected in parallel between the live line of the track signal and the hall sensor.
The track signal input unit 31 is connected with a fuse F1 on a live wire (L wire) of a track signal, and a Hall sensor is connected on a zero wire (N wire) of the track signal and outputs the track signal to the track output unit 6; the current limiting resistor R1, the transformer T1 and the sampling resistor R2 convert the track high-voltage signal into a low-voltage signal and output the low-voltage signal to the track signal voltage conditioning unit 33; the hall sensors on the N lines convert the input current of the track signal into a voltage signal after internal conversion, and output the voltage signal to the track signal current conditioning unit 32.
In this embodiment, as shown in fig. 4, the track signal current conditioning unit 32 includes an operational amplifier U1, a first input end of the operational amplifier U1 is connected to a resistor R3, a second input end of the operational amplifier U1 is connected to a resistor R4 and then grounded, an output end of the operational amplifier U4 is connected to a resistor R6, a resistor R3 is connected to the hall sensor, resistors R6 are respectively connected to the digital signal processing unit 8 and the capacitor C1, and a resistor R5 is connected between the first input end and the output end of the operational amplifier U1.
The track signal current conditioning unit 32 forms an amplifying circuit through an operational amplifier U1, a resistor R3, a resistor R4 and a resistor R5, and amplifies output signals of the hall sensor by multiple times through the operational amplifier to improve the AD acquisition precision.
In this embodiment, as shown in fig. 5, the track signal voltage conditioning unit 33 includes an operational amplifier U2, a first input terminal of the operational amplifier U2 is connected to a resistor R7, a second input terminal of the operational amplifier U2 is connected to a resistor R8 and then grounded, an output terminal of the operational amplifier U8 is connected to a resistor R10, a resistor R7 is connected to a secondary winding of a transformer T1, the resistor R10 is respectively connected to the digital signal processing unit 8 and a capacitor C2, and a resistor R9 is connected between the first input terminal and the output terminal of the operational amplifier U2. The track signal voltage conditioning unit 33 is similar to the track signal current conditioning unit 32 in principle, and is used for amplifying the track low-voltage signal converted by the transformer T1 by multiple times.
In this embodiment, as shown in fig. 6, the track signal frequency detecting unit 34 includes an isolating optocoupler U3, one end of an isolating optocoupler U3 light emitter is connected in series with a resistor R11 and then connected to the track signal input unit 31, a diode D2 is further connected between two ends of the isolating optocoupler U3 light emitter, one end of the light receiver is grounded, the other end of the light receiver is connected to the input ends of a pull-up resistor R12 and an inverter U4, the pull-up resistor R12 is connected to a power supply, and the output end of the inverter U4 is connected to the digital signal processing unit 8.
In this embodiment, as shown in fig. 7, the local signal acquisition unit 2 includes a local input unit 21 and a local signal frequency detection unit 22, the local signal frequency detection unit 22 includes an isolation optocoupler U5, one end of an isolation optocoupler U5 light emitter is connected in series with a resistor R13 and then connected to the local input unit 21, a diode D3 is further connected between two ends of the isolation optocoupler U5 light emitter, one end of the light receiver is grounded, and the other end of the light receiver is connected to the resistor R14 and the input end of an inverter U6, the resistor R14 is connected to a power supply, and the output end of the inverter U6 is connected to the digital signal processing unit 8. Since the local voltage signal is 110VAC, the resistors R13 and R14 are both chip resistors, and the number of current limiting resistors is 2 to reduce the influence of power consumption and temperature.
In this embodiment, as shown in fig. 8, the execution unit 41 includes 8 adjustment units, each adjustment unit includes an optical coupler, one end of the optical coupler is connected to the digital signal processing unit 8, and the other end of the optical coupler is connected to the power supply after being connected in series with the current-limiting resistor; one end of the optical coupler light receiver is grounded, and the other end of the optical coupler light receiver is connected with the relay coil and then is connected with a power supply. The control signal of the execution unit 41 comes from the digital signal processing unit 8, the combination of power compensation is controlled by a relay, and the output thereof is connected to the execution unit 42.
In this embodiment, as shown in fig. 9, the compensation unit 42 includes capacitors whose number is consistent with that of the adjustment units, and the capacitors are also 8, that is, the compensation capacity includes 8 levels, which are C1x and C2x … … C8x respectively, after the capacitors are connected with the normally open contacts of the relays, the capacitors are connected to two ends of the equivalent inductor, and two ends of the equivalent inductor are further connected to the track signal input unit 31.
In this embodiment, the calibration device further includes a communication unit connected to the external bus device, where the communication unit includes an R485 circuit composed of communication management chips to provide a friendly human-computer interface in an intuitive manner, so as to control the number of calibration modules and the reactive compensation capacity.
The calibration method of the embodiment includes the following steps:
s1: the track signal acquisition unit detects actual power consumption parameter data of a calibration load;
s2: the digital signal processing unit compares actual power consumption parameter data of the calibration load with residual data of a single calibration module to obtain the number of the actual calibration modules and preset compensation parameters;
s3: the digital signal processing unit outputs signals, and the execution unit inputs compensation capacity according to preset compensation parameters;
s4: the track signal acquisition unit acquires compensated power consumption parameter data of the calibration load in real time, and the digital signal processing unit compares the compensated power consumption parameter data acquired by the local signal acquisition unit to obtain a deviation value;
s5: the digital signal processing unit outputs signals, and the compensation unit inputs compensation capacity according to the deviation value;
s7: and repeating the steps S4-S5 until the deviation value obtained by the digital signal processing unit is within the preset range.
The specific implementation is that, during calibration, for the channel, its impedance Z ═ R + Xl (1)
Because the resistance R does not change along with the change of the voltage, the impedance Z is measured as R by a direct current measurement method; and applying a 25Hz alternating current signal during calibration, and calculating the inductive reactance Xl of the signal to finally obtain the value of the impedance Z.
For calibrated channels, calibration model thereofThe apparent power S of the block is divided into active power P and inductive reactive power Ql, and the formula is as follows:
therefore, there are
Because the current of the inductive load lags behind the input voltage and the current of the capacitive load leads the input voltage, when the compensation power of the capacitive load is equal to that of the inductive load, only pure resistive active power exists in the circuit, and therefore the consumption is minimum. The compensation coefficient is generally selected to be 0.9-0.95; under-compensation can occur when the temperature is too low, and the compensation effect cannot be achieved; too high, easily overcompensated, also increases the reactive power.
According to the formula: power factor
Ql is the inductive reactive power, and the compensation capacity Qc is calculated according to the formula (4) and the formula (3).
In this embodiment, the track signal detection unit 3 performs AD acquisition of the input voltage and current of the track signal, and the digital processing signal unit 8 determines the load condition of the calibration module by combining the state of the output relay, thereby calculating the inductive reactive power Ql of the channel.
The digital signal processing unit 8 obtains the capacity Qc to be compensated through calculation, and outputs a control signal to control the normally open contact of the relay of the compensation unit 42 to be closed, and the input parameters of the capacitor bank are controlled by controlling the number of the capacitor bank.
Because of the difference of channel parameters, with the increase of calibration modules, the calculated parameters may be larger, fine tuning is required when compensation is required to be put into, on the basis of the input of compensation parameters, the track signal unit collects the compensated power consumption current data of the calibration load in real time, and compares the data with the collection value of the local signal collection unit 2, and the local signal has no load and has 90-degree phase shift with the track signal power consumption current, so that the local signal can be used as a reference.
The digital signal processing unit 8 executes the compensation unit 42 with corresponding capacity to perform fine adjustment according to the magnitude and direction of the current deviation, and the adjustment is repeatedly executed for 3 times at most until the deviation between the current of the current signal conditioning unit 32 and the preset value is minimum, and the current is closest to the preset compensation coefficient.
The invention puts in the reactive compensation power in a closed loop mode, realizes the calibration work of multiple modules under the condition of very small input current, improves the waveform quality during calibration, saves the time cost and improves the cost performance of products.
Although the present description is described in terms of embodiments, not every embodiment includes only a single embodiment, and such description is for clarity only, and those skilled in the art should be able to integrate the description as a whole, and the embodiments can be appropriately combined to form other embodiments as will be understood by those skilled in the art.
In the description of the present invention, it should be noted that relational terms such as first and second, and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
In the description of the present invention, it should be further noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally put in use of products of the present invention, which are merely for convenience of description and simplification of description, but do not indicate or imply that the referred devices or elements must have specific orientations, be constructed in specific orientations, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Therefore, the above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application; all changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (10)
1. An automatic power compensation calibration tool comprises
The input end of the track signal acquisition unit (3) is connected with a track signal;
the input end of the local signal acquisition unit (2) is connected with the local signal;
the digital signal processing unit (8) is coupled with the output ends of the track signal acquisition unit (3) and the local signal acquisition unit (2), and calculates compensation parameters according to the acquisition values of the track signal acquisition unit (3) and the local signal acquisition unit (2);
it is characterized in that the preparation method is characterized in that,
the track signal compensation device is characterized by further comprising a power compensation unit (4), wherein the power compensation unit (4) comprises an execution unit (41) and a compensation unit (42) which are connected, the execution unit (41) is connected with the digital signal processing unit (8), and the compensation unit (42) is respectively connected with the track signal input unit (31) and the track output unit (6).
2. The automatic power compensation calibration tool according to claim 1, wherein the track signal acquisition unit (3) comprises a track signal input unit (31) connected to a track signal, and further comprises a track signal voltage conditioning unit (33), a track signal current conditioning unit (32) and a track signal frequency detection unit (34) which are respectively connected to the track signal input unit (31) and the digital signal processing unit (8).
3. The automatic power compensation calibration tool according to claim 2, wherein the track signal input unit (31) comprises a hall sensor, a transformer T1 and a sampling resistor R2, the hall sensor is connected to a track signal zero line, two ends of a primary winding of the transformer T1 are respectively connected to the hall sensor and a track signal live line, and a secondary winding of the transformer T1 is connected to the track signal voltage conditioning unit (33) after being connected in parallel with the sampling resistor R2; and a track signal frequency detection unit (34) and a track output unit (6) are also connected in parallel between the live wire of the track signal and the Hall sensor.
4. The automatic power compensation calibration tool according to claim 3, wherein the track signal current conditioning unit (32) comprises an operational amplifier U1, a first input end of the operational amplifier U1 is connected with a resistor R3, a second input end of the operational amplifier U1 is connected with a resistor R4 and then grounded, an output end of the operational amplifier U4 is connected with a resistor R6, the resistor R3 is connected with the Hall sensor, the resistor R6 is respectively connected with the digital signal processing unit (8) and the capacitor C1, and a resistor R5 is connected between the first input end and the output end of the operational amplifier U1.
5. The automatic power compensation calibration fixture according to claim 3, wherein the track signal voltage conditioning unit (33) comprises an operational amplifier U2, a first input end of the operational amplifier U2 is connected with a resistor R7, a second input end of the operational amplifier U2 is connected with a resistor R8 and then grounded, an output end of the operational amplifier U8 is connected with a resistor R10, a resistor R7 is connected with a secondary winding of the transformer T1, the resistor R10 is respectively connected with the digital signal processing unit (8) and the capacitor C2, and a resistor R9 is connected between the first input end and the output end of the operational amplifier U2.
6. The automatic power compensation calibration tool according to claim 3, wherein the track signal frequency detection unit (34) comprises an isolation optocoupler U3, one end of the isolation optocoupler U3 light emitter is connected in series with a resistor R11 and then connected to the track signal input unit (31), a diode D2 is further connected between two ends of the isolation optocoupler U3 light emitter, one end of the light receiver is grounded, the other end of the light receiver is respectively connected with a pull-up resistor R12 and an input end of an inverter U4, the pull-up resistor R12 is connected to a power supply, and an output end of the inverter U4 is connected to the digital signal processing unit (8).
7. The automatic power compensation calibration tool according to claim 1 or 6, wherein the local signal acquisition unit (2) comprises a local input unit (21) and a local signal frequency detection unit (22), the local signal frequency detection unit (22) comprises an isolation optocoupler U5, one end of an isolation optocoupler U5 light emitter is connected with a resistor R13 in series and then connected to the local input unit (21), a diode D3 is further connected between two ends of the isolation optocoupler U5 light emitter, one end of the light receiver is grounded, the other end of the light receiver is connected with a resistor R14 and an input end of an inverter U6 respectively, the resistor R14 is connected to a power supply, and an output end of the inverter U6 is connected with the digital signal processing unit (8).
8. The automatic power compensation calibration tool according to claim 1, wherein the execution unit (41) comprises at least two groups of adjusting units, each adjusting unit comprises an optical coupler, one end of each optical coupler is connected with the digital signal processing unit (8), and the other end of each optical coupler is connected with a current limiting resistor in series and then is connected with a power supply; one end of the optical coupler light receiver is grounded, and the other end of the optical coupler light receiver is connected with the relay coil and then is connected with a power supply.
9. The automatic power compensation calibration tool according to claim 7, wherein the compensation unit (42) comprises capacitors with the number corresponding to that of the adjustment units, the capacitors are connected with normally open contacts of the relays and are arranged at two ends of an equivalent inductor, and two ends of the equivalent inductor are further connected with a track signal input unit (31).
10. The calibration method of the automatic power compensation calibration tool according to claim 1, comprising the steps of:
s1: the track signal acquisition unit (3) detects actual power consumption parameter data of a calibration load;
s2: the digital signal processing unit (8) compares actual power consumption parameter data of the calibration load with residual data of a single calibration module to obtain the number of the actual calibration modules and preset compensation parameters;
s3: the digital signal processing unit (8) outputs signals, and the execution unit (41) puts compensation capacity according to preset compensation parameters;
s4: the track signal acquisition unit (3) acquires the compensated power consumption parameter data of the calibration load in real time, and the digital signal processing unit (8) compares the compensated power consumption parameter data acquired by the local signal acquisition unit (2) to obtain a deviation value;
s5: the digital signal processing unit (8) outputs signals, and the compensation unit (42) puts compensation capacity according to the deviation value;
s7: and repeating the steps S4-S5 until the deviation value obtained by the digital signal processing unit (8) is within the preset range.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111722013A (en) * | 2020-06-24 | 2020-09-29 | 合肥工大高科信息科技股份有限公司 | Method and system for detecting 25hz phase-sensitive track circuit signal |
| CN113050016A (en) * | 2021-06-01 | 2021-06-29 | 中国测试技术研究院电子研究所 | Four-terminal method compensation capacitance simulator |
-
2020
- 2020-01-19 CN CN202010060044.9A patent/CN111175685A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111722013A (en) * | 2020-06-24 | 2020-09-29 | 合肥工大高科信息科技股份有限公司 | Method and system for detecting 25hz phase-sensitive track circuit signal |
| CN113050016A (en) * | 2021-06-01 | 2021-06-29 | 中国测试技术研究院电子研究所 | Four-terminal method compensation capacitance simulator |
| CN113050016B (en) * | 2021-06-01 | 2021-08-27 | 中国测试技术研究院电子研究所 | Four-terminal method compensation capacitance simulator |
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