CN102253271A - Real-time measurement device and method for current of electrified overhead line - Google Patents
Real-time measurement device and method for current of electrified overhead line Download PDFInfo
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Abstract
The invention discloses a real-time measurement device and a real-time measurement method for the current of an electrified overhead line, and belongs to the technical field of the current measurement of overhead lines. The device comprises a high-voltage side signal measurement transmitter and a hand-held signal receiver, wherein the high-voltage side signal measurement transmitter comprises a measuring pincerlike sensor, a reference resistor, a measuring reference voltage source, a measuring summing amplifier, a measuring voltage stabilizing source, a measuring microprocessor, a first battery and a high-voltage side transmitting and receiving module; and the hand-held signal receiver comprises a receiving microprocessor, a receiving side transmitting and receiving module, a light-emitting diode (LED) or liquid crystal display (LCD) measuring display module, a receiving voltage stabilizing source, a second battery, a digital analogy conversion and amplification output module and a serial port, a universal serial bus (USB) or a net port. The real-time measurement device is suitable for measuring the load current and zero sequence current of the line in real time under the condition of electrified running of the overhead line; and the real-time measurement device performs communication by a wireless signal, is convenient to carry and high in reliability, and can realize remote data transmission and data display.
Description
Technical field
The invention belongs to overhead transmission line current measurement techniques field, relate in particular to charged real-time measurement apparatus of a kind of overhead transmission line electric current and method.
Background technology
Current measurement is an electric parameter metering the most basic in the electric system, and current measurement is directly connected to the correctness and the reliability of Operation of Electric Systems and control.At present, the measurement of the line load electric current on power transmission network mainly is to finish by the high-tension current inductor that is installed in the transformer station that is connected the circuit two ends, because the electric pressure of power transmission network is very high, working voltage is more than 110 kilovolts, line wire is very high apart from ground, height is more than 30 meters, and circuit connects very succinct, realizes that by the high-tension current inductor that is installed on transformer station current measurement is rational.
In power distribution network, the voltage of overhead transmission line is 10 kilovolts, and about overhead transmission line connects according to tree structure line wire usually below 10 meters apart from ground, owing to there is a large amount of take-off points, needs measurement branches point electric current usually in electrical production.At present, the take-off point electric current is mainly finished by the middle piezoelectricity current transformer that is installed on take-off point.Yet, because take-off point quantity is huge, and along with power distribution network user's continuous expansion take-off point quantity can increase in a large number, the piezoelectricity current transformer is very uneconomical in each take-off point is all installed like this, and the workload of the daily servicing in the production run that can increase electric power, therefore, need a kind of measuring equipment that can transportable accurate measuring circuit electric current.
In addition, owing to adopt the non-effective earthing method of operation at power distribution network, can produce zero-sequence current under circuit operation and the failure condition, by the operation conditions that can know current power distribution network to the measurement and the analysis of zero-sequence current, the measurement of zero-sequence current is very useful for the power distribution network operation.At present, the zero-sequence current in the power distribution network mainly obtains by the middle piezoelectricity current transformer that is installed on transformer station, yet, because middle piezoelectricity current transformer is fixed installation, can only measure the zero-sequence current of infield.For the place that does not have piezoelectricity current transformer in the installation, take-off point single-phase or the biphase current mutual inductor perhaps only has been installed, zero-sequence current just can't be measured.
In addition, middle piezoelectricity current transformer is only exported analog current when measuring electric current, can not directly show, must could show current value by installing suitable instrument additional; Simultaneously, the instrument that is installed additional needs to link together by cable near behind the current transformer, and cable extension can increase the impedance of secondary loop of mutual inductor, thereby cause measuring error to increase, therefore, this metering system can't long-distance transmissions and demonstration, and operating position is limited.
In a word, the deficiencies in the prior art are: hard-wired current transformer can't be realized the measurement of the line current and the zero-sequence current of arbitrfary point in the power distribution network, and can't realize remote numerical value transmission and demonstration.
Summary of the invention
At the existing line current measure device of mentioning in the above-mentioned background technology can not move, zero-sequence current be difficult for to be measured and measurement result is deficiencies such as analog quantity, the present invention proposes charged real-time measurement apparatus of a kind of overhead transmission line electric current and method.
Technical scheme of the present invention is, the charged real-time measurement apparatus of overhead transmission line electric current is characterized in that described device comprises that high-side signal measures transmitter and hand-held signal receiver, and high-side signal is measured transmitter and is connected with hand-held signal receiver;
Described high-side signal is measured transmitter and is comprised the pincerlike sensor of measurement, reference resistance, measuring basis voltage source, measures summing amplifier, measures source of stable pressure, measures microprocessor, first battery and high-pressure side transmitting and receiving module;
Described first battery is connected with the measurement source of stable pressure; Measuring source of stable pressure is connected with the high-pressure side transmitting and receiving module with measuring basis voltage source, measurement microprocessor respectively; Measuring basis voltage source, the pincerlike sensor of measurement and reference resistance are connected with the measurement summing amplifier respectively; Measuring summing amplifier is connected with the measurement microprocessor; Measuring microprocessor is connected with the high-pressure side transmitting and receiving module;
Described hand-held signal receiver comprises that receiving microprocessor, receiver side transmitting and receiving module, LED or LCD measures display module, reception source of stable pressure, second battery, digital-to-analogue conversion and amplify output module and interface;
Described second battery is connected with the reception source of stable pressure; Receiving source of stable pressure measures display module, receiver side transmitting and receiving module with LED or LCD respectively, receives microprocessor and be connected with interface; The receiver side transmitting and receiving module is connected with the reception microprocessor; Receiving microprocessor is connected with interface with LED or LCD measurement display module, digital-to-analogue conversion and amplification output module respectively.
Described high-side signal is measured transmitter and is connected by wireless signal with hand-held signal receiver.
Described interface is serial ports, USB or network interface.
A kind of method of using the real-time measuring circuit zero-sequence current of the described device of claim 1 is characterized in that this method may further comprise the steps:
Step 1: open the pincerlike sensor of measurement that three high-side signal are measured transmitter, clamp A phase, B phase and C circuit mutually respectively;
Step 2: hand-held signal receiver is measured transmitter by the receiver side transmitting and receiving module to described three high-side signal and is sent the line current data acquisition command simultaneously;
Step 3: after described three high-side signal measurement transmitter receives data acquisition command by the high-pressure side transmitting and receiving module, is that voltage signal is transferred to the measurement summing amplifier by measuring pincerlike sensor and reference resistance with the line load current conversion, measure and be transferred to the measurement microprocessor after summing amplifier amplifies voltage signal, finish data acquisition and store data;
Step 4: described three high-side signal measurement transmitter will be stored data by the high-pressure side transmitting and receiving module and send to hand-held signal receiver successively with C order mutually mutually according to A phase, B;
Step 5: hand-held signal receiver is transferred to the reception microprocessor by the receiver side transmitting and receiving module with the signal that receives, and receives microprocessor and calculates the evaluation of circuit zero-sequence current and the effective value of circuit zero-sequence current;
Step 6: receive microprocessor circuit zero sequence current effective value is measured the display module demonstration by LED or LCD; Evaluation and circuit zero sequence current effective value by interface output A phase, B phase and C circuit zero-sequence current mutually; By digital-to-analogue conversion and amplification output module outlet line zero-sequence current effective value.
The computing formula of the evaluation of described circuit zero-sequence current is:
i
0＝i
a+i
b+i
c
Wherein:
i
0Computational data for the circuit zero-sequence current;
i
aBe A phase circuit current acquisition data;
i
bBe B phase circuit current acquisition data;
i
cBe C phase circuit current acquisition data.
The computing formula of described circuit zero sequence current effective value is:
Wherein:
I
0Be circuit zero sequence current effective value;
i
0(i) be the evaluation of circuit zero-sequence current;
I is a times of collection.
A kind of method of using the real-time measuring circuit load current of the described device of claim 1 is characterized in that this method may further comprise the steps:
Step 1: the pincerlike sensor clip of measurement of measuring transmitter with high-side signal is lived circuit to be measured;
Step 2: hand-held signal receiver is measured transmitter to described high-side signal and is sent the line current data acquisition command by the receiver side transmitting and receiving module;
Step 3: after described high-side signal measurement transmitter receives data acquisition command by the high-pressure side transmitting and receiving module, is that voltage signal is transferred to the measurement summing amplifier by measuring pincerlike sensor and reference resistance with the line load current conversion, measure and be transferred to the measurement microprocessor after summing amplifier amplifies voltage signal, finish data acquisition and store data;
Step 4: described high-side signal measurement transmitter will be stored data by the high-pressure side transmitting and receiving module and send to hand-held signal receiver;
Step 5: described hand-held signal receiver is transferred to the reception microprocessor by the receiver side transmitting and receiving module with the signal that receives, and receives the effective value that microprocessor calculates the line load electric current;
Step 6: receive microprocessor the effective value of line load electric current is measured the display module demonstration by LED or LCD; By the image data of interface outlet line electric current and the effective value of line load electric current; Effective value by digital-to-analogue conversion and amplification output module outlet line load current.
The computing formula of the effective value of described line load electric current is:
Wherein:
I is a circuit zero sequence current effective value;
i
1(i) be the image data of line current.
Advantage of the present invention is as follows:
1, the present invention shows and output pincerlike sensor is transferred to hand-held signal receiver after with the current acquisition of clamping circuit by transmitting after by measuring, therefore can in power distribution network, clamp aerial condutor on the circuit of arbitrfary point, thereby realize the line current of arbitrfary point in the power distribution network and the measurement of zero-sequence current.
2, the pincerlike sensor output signal among the present invention is directly gathered and by signal radiation pattern transmission of digital signals, the secondary circuit impedance of pincerlike sensor is minimum to ignoring, in signal emission and transmission course, adopt transmission of digital signals, antijamming capability is strong, and therefore the signal accuracy in hand-held signal receiver demonstration and output is very high.
3, pass through signal radiation pattern transmission of digital signals among the present invention, therefore can realize the transmission and the demonstration of telemeasurement numerical value.
4, the present invention is applicable to the load current and the zero-sequence current real-time measurement apparatus of various electric pressure overhead transmission lines such as 10 kilovolts, 6.6 kilovolts, 380 volts.
Description of drawings
Fig. 1 is the scheme synoptic diagram of the present invention at the measuring circuit load current;
Fig. 2 is the scheme synoptic diagram of the present invention at the measuring circuit zero-sequence current;
Fig. 3 is a structural representation of the present invention;
Fig. 4 is the schematic diagram that high-side signal is measured transmitter;
Fig. 5 is the schematic diagram of hand-held signal receiver.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment is elaborated.Should be emphasized that following explanation only is exemplary, rather than in order to limit the scope of the invention and to use.
The invention provides a kind of brand-new the overhead transmission line load current under the charged situation of overhead transmission line and zero-sequence current real-time measurement apparatus and method, the measurement of the line current and the zero-sequence current of arbitrfary point in the power distribution network can be realized, and remote numerical value transmission and demonstration can be carried out.
Technical scheme of the present invention is: the charged real-time measurement apparatus of a kind of overhead transmission line electric current comprises high-side signal measurement transmitter and hand-held signal receiver; High-side signal is measured the A phase of transmitter in overhead transmission line high-pressure side measuring circuit, B phase and C load current instantaneous value mutually, by the high-pressure side transmitting and receiving module load current instantaneous value is transferred to hand-held signal receiver, hand-held signal receiver calculates received data by receiving microprocessor, calculate each phase load electric current and zero-sequence current, show by LED charactron display or LCD LCD, by data communication method measurement data and computational data are sent to slave computer, measurement data is converted to simulating signal and amplifies back output by digital-to-analogue conversion and amplification output module.
1. high-side signal measurement transmitter comprises the pincerlike sensor of measurement, reference resistance, measuring basis voltage source, measures summing amplifier, measures source of stable pressure, measures microprocessor, first battery and high-pressure side transmitting and receiving module.
Measuring pincerlike sensor and reference resistance is that voltage signal is transferred to the measurement summing amplifier with the line load current conversion, measuring basis voltage source output voltage signal is to measuring summing amplifier, the output signal of measuring summing amplifier is transferred to the measurement microprocessor, be input to the high-pressure side transmitting and receiving module after measuring the microprocessor processes signal, measure and be input to the measuring basis voltage source after source of stable pressure is changed first cell voltage, measure microprocessor and high-pressure side transmitting and receiving module.
2. hand-held signal receiver comprises that receiving microprocessor, receiver side transmitting and receiving module, LED or LCD measures display module, second battery, receives source of stable pressure and digital-to-analogue conversion and amplify output module and serial ports, USB or network interface.
The receiver side transmitting and receiving module is transferred to the reception microprocessor with the signal that receives, and receives microprocessor shows signal is transferred to LED or LCD measurement display module, receives microprocessor and transfers signals to digital-to-analogue conversion and amplify output module; Receive microprocessor and transfer signals to serial ports, USB or network interface; Receive and be input to LED or LCD measurement display module after source of stable pressure is changed second cell voltage, receive microprocessor, receiver side transmitting and receiving module and serial ports, USB or network interface.
The method of the charged real-time measurement apparatus measuring circuit of overhead transmission line electric current zero-sequence current is characterized in that this method may further comprise the steps:
Step 1: open the pincerlike sensor of measurement that three high-side signal are measured transmitter, clamp A phase, B phase and C circuit mutually respectively;
Step 2: hand-held signal receiver is measured transmitter by the receiver side transmitting and receiving module to described three high-side signal and is sent the line current data acquisition command simultaneously;
Step 3: after described three high-side signal measurement transmitter receives data acquisition command by the high-pressure side transmitting and receiving module, is that voltage signal is transferred to the measurement summing amplifier by measuring pincerlike sensor and reference resistance with the line load current conversion, measure and be transferred to the measurement microprocessor after summing amplifier amplifies voltage signal, finish data acquisition and store data;
Step 4: described three high-side signal measurement transmitter will be stored data by the high-pressure side transmitting and receiving module and send to hand-held signal receiver successively with C order mutually mutually according to A phase, B;
Step 5: hand-held signal receiver is transferred to the reception microprocessor by the receiver side transmitting and receiving module with the signal that receives, and receives microprocessor and calculates the evaluation of circuit zero-sequence current and the effective value of circuit zero-sequence current;
Computing formula is:
i
0＝i
a+i
b+i
c
Wherein:
i
0Evaluation for the circuit zero-sequence current;
i
aBe A phase circuit current acquisition data;
i
bBe B phase circuit current acquisition data;
i
cBe C phase circuit current acquisition data;
Wherein:
I
0Effective value for the circuit zero-sequence current;
i
0(i) be the evaluation of circuit zero-sequence current;
I is a times of collection;
Step 6: receive microprocessor circuit zero sequence current effective value is measured the display module demonstration by LED or LCD; Evaluation and circuit zero sequence current effective value by serial ports, USB or network interface output A phase, B phase and C circuit zero-sequence current mutually; By digital-to-analogue conversion and amplification output module outlet line zero-sequence current effective value.
The method of the charged real-time measurement apparatus measuring circuit of overhead transmission line electric current load current is characterized in that this method may further comprise the steps:
Step 1: the pincerlike sensor clip of measurement of measuring transmitter with high-side signal is lived circuit to be measured;
Step 2: hand-held signal receiver is measured transmitter to described high-side signal and is sent the line current data acquisition command by the receiver side transmitting and receiving module;
Step 3: after described high-side signal measurement transmitter receives data acquisition command by the high-pressure side transmitting and receiving module, is that voltage signal is transferred to the measurement summing amplifier by measuring pincerlike sensor and reference resistance with the line load current conversion, measure and be transferred to the measurement microprocessor after summing amplifier amplifies voltage signal, finish data acquisition and store data;
Step 4: described high-side signal measurement transmitter will be stored data by the high-pressure side transmitting and receiving module and send to hand-held signal receiver;
Step 5: described hand-held signal receiver is transferred to the reception microprocessor by the receiver side transmitting and receiving module with the signal that receives, and receives the effective value that microprocessor calculates the line load electric current;
Computing formula is:
Wherein:
I is the effective value of circuit zero-sequence current;
i
1(i) be the image data of line current;
Step 6: receive microprocessor the effective value of line load electric current is measured the display module demonstration by LED or LCD; By the image data of serial ports, USB or network interface outlet line electric current and the effective value of line load electric current; Effective value by digital-to-analogue conversion and amplification output module outlet line load current.
The device of overhead transmission line live line measurement load current of the present invention and zero-sequence current is applicable to the overhead transmission line of various electric pressures such as 10 kilovolts, 6.6 kilovolts, 380 volts, measure transmitter by high-side signal the current data that measures is transmitted into hand-held signal receiver after treatment, hand-held signal receiver shows received data after treatment, and by digital form or analog form output, power supply minor measuring instrument uses.
The present invention at the scheme synoptic diagram of measuring circuit load current as shown in Figure 1.A phase high-side signal is measured the top that transmitter 36 is installed in insulating bar 38, place then near the A phase overhead transmission line 33, after the pincerlike sensor of measurement is wherein opened measured circuit is clamped; The hand-held signal receiver 37 of load current is measured transmitter 36 to A phase high-side signal and is sent the line current data acquisition command; High-side signal is measured transmitter 36 and is received log-on data collection immediately behind the data acquisition command, finishes data acquisition and store data in the regular hour; After the data acquisition of A phase high-side signal measurement transmitter 36 is finished, send the data of gathering to the hand-held signal receiver 37 of load current; The hand-held signal receiver 37 of load current is being received after A phase high-side signal measures the data that transmitter 36 sent the effective value of beginning computational scheme electric current; The hand-held signal receiver 37 of load current is measured display module with result of calculation by LED or LCD and is shown, by serial ports, USB or network interface outlet line current acquisition numerical value and effective value, by digital-to-analogue conversion and amplification output module outlet line current acquisition numerical value.
The present invention at the scheme synoptic diagram of measuring circuit zero-sequence current as shown in Figure 2.With A phase high-side signal measure transmitter 41, B phase high-side signal measure transmitter 42 and C mutually high-side signal measure the top that transmitter 43 is installed in insulating bar 38, place A phase overhead transmission line 33, B phase overhead transmission line 32 and C mutually near the overhead transmission line 31 then, respectively A phase, B phase, C phase circuit are clamped after the pincerlike sensor of measurement is wherein opened; The hand-held signal receiver 44 of zero-sequence current is measured transmitter 41,42,43 to above three high-side signal and is sent the line current data acquisition command simultaneously; Three high-side signal are measured transmitters 41,42,43 and are received log-on data collection immediately behind the data acquisition command, finish data acquisition and store data in the regular hour; After 41,42,43 data acquisitions of three high-side signal measurement transmitters are finished, send the data of collection successively to the hand-held signal receiver 44 of zero-sequence current according to the order of A phase, B phase, C phase; The hand-held signal receiver of zero-sequence current begins the computational scheme zero-sequence current after receiving three high-side signal measurement transmitter 41,42,43 data that sent; The hand-held signal receiver of zero-sequence current is measured display module with circuit zero sequence current effective value by LED or LCD and is shown, by serial ports, USB or network interface output A phase, B phase, C phase circuit current acquisition numerical value and zero-sequence current evaluation, by digital-to-analogue conversion and amplification output module output zero-sequence current evaluation.
Structural representation of the present invention as shown in Figure 3, it comprises that high-side signal measures transmitter and hand-held signal receiver; High-side signal is measured the A phase of transmitter in overhead transmission line high-pressure side measuring circuit, B phase and C load current instantaneous value mutually, by signal emission module the load current instantaneous value is transferred to hand-held signal receiver, hand-held signal receiver calculates received data, calculate each phase load electric current and zero-sequence current, show by LED charactron display or LCD LCD, by data communication method measurement data and computational data are sent to slave computer, measurement data is converted to simulating signal and amplifies back output by digital analog converter.
The schematic diagram of high-side signal measurement transmitter is made up of power pack, A/D, blue teeth wireless transceiver module as shown in Figure 4.Constituting power pack by small current mutual inductor and resistance R z is transformed to power line current and exchanges 0 to 5V signal, exchange 0 to 5V signal and be input among the input operational amplifier U1 U1, reference voltage source AD584 and resistance R 1, R2, R3, Rf composition summing amplifier.Input operational amplifier U1 output is received on the P1.0 pin of 8051F040, and 8051F040 contains inside ADC and additional reference voltage source.8051F040 is by P3.1, P3.2, P3.3, P3.4, P3.5, P3.6 corresponding the linking to each other of port CE, PWR-UP, CS, CLK1, DR1, DATA with blue teeth wireless transceiver module CRM2400, is used to receive hand-held signal receiver acquisition and to hand-held signal receiver transmission image data.Source of stable pressure LM319 is converted to the required operating voltage of reference voltage source AD584 with the input voltage of 9V battery, simultaneously the output terminal of source of stable pressure LM319 is received the input end of Voltage stabilizing module LM2937, and LM2937 provides working power for CPU8051F040 and blue teeth wireless transceiver module CRM2400.
The schematic diagram of hand-held signal receiver is made up of CPU, blue teeth wireless transceiver module, LCD display module and USB serial port module as shown in Figure 5.8051F040 was used to receive high-side signal and measures the transmitter image data and measure transmitter transmission acquisition to high-side signal by P3.1, P3.2, P3.3, P3.4, P3.5, P3.6 corresponding the linking to each other of port CE, PWR-UP, CS, CLK1, DR1, DATA with blue teeth wireless transceiver module CRM2400.8051F040 by P1.1, P1.2, P1.3, with port/CS of LCD LCD MODULE LCM046 ,/WR, DA are corresponding continuous, are used to drive LCD with demonstration result of calculation.8051F040 is used to export image data and result of calculation by P1.4, P1.5 corresponding the linking to each other of port TXD, RXD with USB serial port module SP3223.The input end of source of stable pressure LM319 is received on the 9V battery, and output terminal is received the power end of CPU8051F040, blue teeth wireless transceiver module CRM2400, LCD LCD MODULE LCM046 and USB serial port module SP3223, for they provide stable working power.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (8)
1. the charged real-time measurement apparatus of overhead transmission line electric current is characterized in that described device comprises high-side signal measurement transmitter and hand-held signal receiver, and high-side signal is measured transmitter and is connected with hand-held signal receiver;
Described high-side signal is measured transmitter and is comprised the pincerlike sensor of measurement, reference resistance, measuring basis voltage source, measures summing amplifier, measures source of stable pressure, measures microprocessor, first battery and high-pressure side transmitting and receiving module;
Described first battery is connected with the measurement source of stable pressure; Measuring source of stable pressure is connected with the high-pressure side transmitting and receiving module with measuring basis voltage source, measurement microprocessor respectively; Measuring basis voltage source, the pincerlike sensor of measurement and reference resistance are connected with the measurement summing amplifier respectively; Measuring summing amplifier is connected with the measurement microprocessor; Measuring microprocessor is connected with the high-pressure side transmitting and receiving module;
Described hand-held signal receiver comprises that receiving microprocessor, receiver side transmitting and receiving module, LED or LCD measures display module, reception source of stable pressure, second battery, digital-to-analogue conversion and amplify output module and interface;
Described second battery is connected with the reception source of stable pressure; Receiving source of stable pressure measures display module, receiver side transmitting and receiving module with LED or LCD respectively, receives microprocessor and be connected with interface; The receiver side transmitting and receiving module is connected with the reception microprocessor; Receiving microprocessor is connected with interface with LED or LCD measurement display module, digital-to-analogue conversion and amplification output module respectively.
2. the charged real-time measurement apparatus of overhead transmission line electric current according to claim 1 is characterized in that described high-side signal measurement transmitter is connected by wireless signal with hand-held signal receiver.
3. the charged real-time measurement apparatus of overhead transmission line electric current according to claim 1 is characterized in that described interface is serial ports, USB or network interface.
4. method of using the real-time measuring circuit zero-sequence current of the described device of claim 1 is characterized in that this method may further comprise the steps:
Step 1: open the pincerlike sensor of measurement that three high-side signal are measured transmitter, clamp A phase, B phase and C circuit mutually respectively;
Step 2: hand-held signal receiver is measured transmitter by the receiver side transmitting and receiving module to described three high-side signal and is sent the line current data acquisition command simultaneously;
Step 3: after described three high-side signal measurement transmitter receives data acquisition command by the high-pressure side transmitting and receiving module, is that voltage signal is transferred to the measurement summing amplifier by measuring pincerlike sensor and reference resistance with the line load current conversion, measure and be transferred to the measurement microprocessor after summing amplifier amplifies voltage signal, finish data acquisition and store data;
Step 4: described three high-side signal measurement transmitter will be stored data by the high-pressure side transmitting and receiving module and send to hand-held signal receiver successively with C order mutually mutually according to A phase, B;
Step 5: hand-held signal receiver is transferred to the reception microprocessor by the receiver side transmitting and receiving module with the signal that receives, and receives microprocessor and calculates the evaluation of circuit zero-sequence current and the effective value of circuit zero-sequence current;
Step 6: receive microprocessor circuit zero sequence current effective value is measured the display module demonstration by LED or LCD; Evaluation and circuit zero sequence current effective value by interface output A phase, B phase and C circuit zero-sequence current mutually; By digital-to-analogue conversion and amplification output module outlet line zero-sequence current effective value.
5. a kind of method of using the real-time measuring circuit zero-sequence current of the described device of claim 1 according to claim 4 is characterized in that the computing formula of the evaluation of described circuit zero-sequence current is:
i
0＝i
a+i
b+i
c
Wherein:
i
0Computational data for the circuit zero-sequence current;
i
aBe A phase circuit current acquisition data;
i
bBe B phase circuit current acquisition data;
i
cBe C phase circuit current acquisition data.
6. a kind of method of using the real-time measuring circuit zero-sequence current of the described device of claim 1 according to claim 4 is characterized in that the computing formula of described circuit zero sequence current effective value is:
Wherein:
I
0Be circuit zero sequence current effective value;
i
0(i) be the evaluation of circuit zero-sequence current;
I is a times of collection.
7. method of using the real-time measuring circuit load current of the described device of claim 1 is characterized in that this method may further comprise the steps:
Step 1: the pincerlike sensor clip of measurement of measuring transmitter with high-side signal is lived circuit to be measured;
Step 2: hand-held signal receiver is measured transmitter to described high-side signal and is sent the line current data acquisition command by the receiver side transmitting and receiving module;
Step 3: after described high-side signal measurement transmitter receives data acquisition command by the high-pressure side transmitting and receiving module, is that voltage signal is transferred to the measurement summing amplifier by measuring pincerlike sensor and reference resistance with the line load current conversion, measure and be transferred to the measurement microprocessor after summing amplifier amplifies voltage signal, finish data acquisition and store data;
Step 4: described high-side signal measurement transmitter will be stored data by the high-pressure side transmitting and receiving module and send to hand-held signal receiver;
Step 5: described hand-held signal receiver is transferred to the reception microprocessor by the receiver side transmitting and receiving module with the signal that receives, and receives the effective value that microprocessor calculates the line load electric current;
Step 6: receive microprocessor the effective value of line load electric current is measured the display module demonstration by LED or LCD; By the image data of interface outlet line electric current and the effective value of line load electric current; Effective value by digital-to-analogue conversion and amplification output module outlet line load current.
8. a kind of method of using the real-time measuring circuit load current of the described device of claim 1 according to claim 7 is characterized in that the computing formula of the effective value of described line load electric current is:
Wherein:
I is a circuit zero sequence current effective value;
i
1(i) be the image data of line current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110183552.7A CN102253271B (en) | 2011-06-30 | 2011-06-30 | Real-time measurement device and method for current of electrified overhead line |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110183552.7A CN102253271B (en) | 2011-06-30 | 2011-06-30 | Real-time measurement device and method for current of electrified overhead line |
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| Publication Number | Publication Date |
|---|---|
| CN102253271A true CN102253271A (en) | 2011-11-23 |
| CN102253271B CN102253271B (en) | 2014-02-19 |
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| CN201110183552.7A Expired - Fee Related CN102253271B (en) | 2011-06-30 | 2011-06-30 | Real-time measurement device and method for current of electrified overhead line |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106405193A (en) * | 2016-08-30 | 2017-02-15 | 武汉四维恒通科技有限公司 | Wireless high voltage measuring instrument |
| CN107796979A (en) * | 2017-10-02 | 2018-03-13 | 国网山西省电力公司电力科学研究院 | The overhead distribution zero-sequence current waveform acquisition equipment of anti-nearby lines interference |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06230066A (en) * | 1993-02-02 | 1994-08-19 | Furukawa Electric Co Ltd:The | Noncontact surge detecting sensor and location of accident section by using noncontact surge detecting sensor |
| CN101017602A (en) * | 2007-02-09 | 2007-08-15 | 河海大学常州校区 | The circuit device of the power grid harmonious radio detector and its working method |
| CN200989926Y (en) * | 2006-08-17 | 2007-12-12 | 浙江大学 | Radio digital nuclear phase system |
| CN101813735A (en) * | 2009-02-24 | 2010-08-25 | 上海宝钢化工有限公司 | Grounding detection device for power distribution system and fault detection method thereof |
| CN101839958A (en) * | 2010-04-28 | 2010-09-22 | 华北电力大学 | Electrified locating device for single-phase earth fault of electric distribution network |
| CN202145218U (en) * | 2011-06-30 | 2012-02-15 | 华北电力大学 | Live aerial line current real-time measuring apparatus |
-
2011
- 2011-06-30 CN CN201110183552.7A patent/CN102253271B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06230066A (en) * | 1993-02-02 | 1994-08-19 | Furukawa Electric Co Ltd:The | Noncontact surge detecting sensor and location of accident section by using noncontact surge detecting sensor |
| CN200989926Y (en) * | 2006-08-17 | 2007-12-12 | 浙江大学 | Radio digital nuclear phase system |
| CN101017602A (en) * | 2007-02-09 | 2007-08-15 | 河海大学常州校区 | The circuit device of the power grid harmonious radio detector and its working method |
| CN101813735A (en) * | 2009-02-24 | 2010-08-25 | 上海宝钢化工有限公司 | Grounding detection device for power distribution system and fault detection method thereof |
| CN101839958A (en) * | 2010-04-28 | 2010-09-22 | 华北电力大学 | Electrified locating device for single-phase earth fault of electric distribution network |
| CN202145218U (en) * | 2011-06-30 | 2012-02-15 | 华北电力大学 | Live aerial line current real-time measuring apparatus |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106405193A (en) * | 2016-08-30 | 2017-02-15 | 武汉四维恒通科技有限公司 | Wireless high voltage measuring instrument |
| CN107796979A (en) * | 2017-10-02 | 2018-03-13 | 国网山西省电力公司电力科学研究院 | The overhead distribution zero-sequence current waveform acquisition equipment of anti-nearby lines interference |
| CN107796979B (en) * | 2017-10-02 | 2019-12-13 | 国网山西省电力公司电力科学研究院 | Zero sequence current waveform acquisition device for overhead distribution line with near line interference resistance |
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| CN102253271B (en) | 2014-02-19 |
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