WO2022252664A1 - 无线电气传感器、电参量测量计算装置、方法及系统 - Google Patents

无线电气传感器、电参量测量计算装置、方法及系统 Download PDF

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Publication number
WO2022252664A1
WO2022252664A1 PCT/CN2022/074663 CN2022074663W WO2022252664A1 WO 2022252664 A1 WO2022252664 A1 WO 2022252664A1 CN 2022074663 W CN2022074663 W CN 2022074663W WO 2022252664 A1 WO2022252664 A1 WO 2022252664A1
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Prior art keywords
wireless
electrical signal
module
signal
electrical
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PCT/CN2022/074663
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English (en)
French (fr)
Inventor
曹锐
陈江
宋燕军
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太原市优特奥科电子科技有限公司
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Priority claimed from CN202110614608.3A external-priority patent/CN115436869B/zh
Application filed by 太原市优特奥科电子科技有限公司 filed Critical 太原市优特奥科电子科技有限公司
Priority to JP2023575448A priority Critical patent/JP2024520766A/ja
Priority to EP22814713.8A priority patent/EP4350365A1/en
Publication of WO2022252664A1 publication Critical patent/WO2022252664A1/zh

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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
    • G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R21/00—Arrangements for measuring electric power or power factor
    • G01R21/06—Arrangements for measuring electric power or power factor by measuring current and voltage
    • 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
    • G01R22/061—Details of electronic electricity meters
    • G01R22/063—Details of electronic electricity meters related to remote communication
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
    • G01R15/186—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers using current transformers with a core consisting of two or more parts, e.g. clamp-on type
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
    • G01R19/2506—Arrangements for conditioning or analysing measured signals, e.g. for indicating peak values ; Details concerning sampling, digitizing or waveform capturing
    • G01R19/2509—Details concerning sampling, digitizing or waveform capturing

Definitions

  • the present application relates to the field of electric power, in particular to a wireless electrical sensor, an electrical parameter measurement and calculation device, method and system.
  • this application provides a wireless electrical sensor, an electrical parameter measurement and calculation device, method and system, in which the electrical parameter measurement and calculation device is equipped with a wireless module, and receives other electrical acquisition units ( An electrical signal (such as current or voltage) transmitted by a sensor such as a current sensor or a voltage sensor), thereby reducing the use of test leads.
  • An electrical signal such as current or voltage transmitted by a sensor such as a current sensor or a voltage sensor
  • a second electrical signal acquisition module configured to acquire the first electrical signal
  • the second wireless module is configured to receive the collected first electrical signal and send the collected first electrical signal wirelessly.
  • an electrical parameter measurement and calculation system comprising the electrical parameter measurement and calculation device as described in the first aspect and the wireless electrical sensor as described in the third aspect.
  • the beneficial effects produced include:
  • the wireless module is used to receive electrical signals, which has changed the practice of using wired current/voltage sensors to collect current/voltage signals in the industry, eliminating the use of test lines, and making the distance between current and voltage test points not limited by cable length , so as to select an optimal signal acquisition point for collection, which makes the operation easier for the staff, and at the same time avoids the safety hazards caused by the winding and knotting of the test line and the damage of the insulation layer of the test line.
  • a part of the electrical signal acquisition module is integrated in the electrical parameter measurement and calculation device, and the electrical signal acquisition and electrical signal transmission are completed in the device.
  • the test line is omitted, and further The delay and loss caused by signal transmission are reduced.
  • the transmission of this part of the electrical signal does not require the use of a wireless module, so that the wireless transmission of the entire device is reduced by 50%, the power consumption is reduced, and the volume is reduced.
  • the small size makes the layout of the entire electrical parameter measurement computing device or system more concise, reduces the complexity of the system, makes the communication between modules in the system simpler and more efficient, and reduces the cost of the system.
  • the electrical parameter measurement calculation device and the wireless module of the wireless electrical sensor or the wireless synchronization unit share synchronized signal sampling time information to realize synchronous sampling of the first electrical signal and the second electrical signal.
  • the wireless module or wireless synchronization unit adopts general GNSS timing or 5G timing, which can ensure that the received time source is consistent.
  • the wireless module or wireless synchronization unit adopts the local clock information in the form of pulse and/or time stamp, it has the characteristics of small jitter (such as within 10us range) and small delay in wireless transmission of information, and the clock information received and restored by one end
  • the time error with the sent local clock information does not exceed 20us, so as to obtain high-precision electrical parameter information, for example, the measurement accuracy of power and/or electric energy is better than 2%.
  • the wireless module or wireless synchronization unit supports the use of local clock information to synchronize signal sampling time information, avoiding the situation that the device cannot be used due to the failure to receive satellite timing in harsh environments.
  • the electrical signal acquisition module integrated in the electrical parameter measurement and calculation device can be a voltage acquisition module or a current acquisition module, and the user can flexibly choose according to actual scene needs.
  • the voltage acquisition module of the electrical parameter measurement and calculation device can acquire the voltage of multiple lines by sharing a common voltage reference point, which has a wider application range and supports single-phase electric energy meters, three-phase three-wire electric energy meters, and three-phase four-wire electric energy Meter, phase volt-ammeter in three-phase three-wire power distribution system and phase volt-ammeter in three-phase four-wire power distribution system, etc.
  • FIG. 1 is a schematic diagram of an electrical parameter measurement and calculation system according to an embodiment of the present invention.
  • Fig. 2 is a schematic structural diagram of a wireless current sensor according to an embodiment of the present invention.
  • Fig. 3 is a schematic structural diagram of another wireless current sensor according to an embodiment of the present invention.
  • Fig. 4 is a schematic structural diagram of an electrical parameter measurement and calculation device according to an embodiment of the present invention.
  • Fig. 5 is a schematic structural diagram of another electrical parameter measurement and calculation device according to an embodiment of the present invention.
  • Fig. 6 is a schematic structural diagram of a high-precision level device with functions of measuring electrical parameters and/or calibrating electric energy meters according to an embodiment of the present invention.
  • Fig. 7 is a schematic structural diagram of another high-precision level device with functions of measuring electrical parameters and/or calibrating electric energy meters according to an embodiment of the present invention.
  • Fig. 8 is a schematic structural diagram of a phase voltammetry tester according to an embodiment of the present invention.
  • Fig. 9 is a schematic structural diagram of a power quality analyzer according to an embodiment of the present invention.
  • the electrical parameter measuring and calculating device described in the present invention can be any kind of equipment for measuring electricity detection, including but not limited to electric energy meter calibrator, phase voltammeter, power analyzer, portable PMU synchronous vector measuring device, electric energy Quality analyzer, power consumption tester, six-way differential protection vector tester, double clamp grounding resistance tester, memory recorder, portable multi-functional energy meter, oscilloscope, digital multimeter, etc.
  • the wireless gas sensor described in the present invention can be any sensor that collects voltage and/or current signals, including but not limited to current clamps, flexible current probes, flexible Rogowski coils, and the like.
  • a traditional electrical parameter measuring and calculating device uses a voltage test line and a current test line to connect with the object under test.
  • the terminal end of the voltage test line is connected to the electrical parameter measuring and calculating device, and the alligator clip end is connected to the object under test to obtain a voltage signal.
  • the terminal end of the current test line is connected to the electrical parameter measuring and calculating device, and the current clamp end is connected to the object under test to obtain a current signal.
  • the voltage test line and current test line are about 2 meters long. It takes time and effort to find the corresponding terminals or clips when connecting the test lines. After the whole set of equipment is connected, there are many test lines on site, making it difficult to find problems.
  • the inventor proposes a wireless improvement plan, and makes each test line into a sensor device.
  • the whole set of equipment includes 3 voltage sensors (6 clamps), 3 current sensors and Computing device, corresponding to each sensor device, requires a wireless module and computing device to complete the functions of wireless signal transmission and signal time synchronization.
  • the test line of the whole set of equipment is reduced, the number of wireless modules is large, the transmission capacity is large, the bandwidth is high, and the function consumes a lot.
  • the current signal can be made into a current loop or a current clamp and directly placed on the transmission line to obtain the current signal, but the voltage signal adopts the wiring method of sharing the common voltage reference point, so that the common voltage reference point is shared by three voltage sensor clamps, resulting in Clamp congestion, etc.
  • Improvement 2 On the basis of Improvement 1, the inventor considers a feasible solution to reduce the number of wireless modules and solve the congestion of wire clamps. If 3 current sensors are integrated into 1 current sensor, the number of wireless modules is reduced by 2; if 3 voltage sensors are integrated into 1 voltage sensor, the number of wireless modules is reduced by 2, and at the same time, the 6 clamps of the voltage sensor can be reduced to 4 wire clips. Based on such considerations, the inventor integrated three voltage sensors into one voltage sensor to complete, that is, the whole set of equipment includes one voltage sensor, three current sensors and a computing device, so that the number of wireless modules is reduced by two, and the number of voltage sensors is 6. The number of clips is reduced to 4, and the acquisition of 3-way voltage signals is completed, saving the measurement signal points.
  • Improvement 3 On the basis of Improvement 2, in order to further reduce the problem of a large amount of voltage signal data transmission, the inventor considers integrating the computing device with the sensors, so that the data generated by these sensors does not need to be transmitted wirelessly. On the one hand, considering the difference in data transmission volume, the voltage sensor transmits three voltage signals, and one current sensor transmits one current signal. Based on the consideration of data transmission volume, it is more efficient to choose an integrated voltage sensor in the computing device.
  • the integrated voltage sensor is selected in the computing device . Therefore, the existing inventive concept is formed, that is, the whole set of equipment includes three current sensors and a computing device.
  • the current sensor sends the collected current signal to the computing device through a wireless module, and the computing device integrates a voltage acquisition module.
  • the test line of the acquisition module directly measures the voltage at the nearest position of the measured object, so that the wireless modules of the whole set of equipment are reduced from 4 to 3, but the signal transmission volume is reduced by 50%, which greatly improves the transmission efficiency of the whole set of equipment.
  • a combination of an integrated voltage sensor and a wireless current sensor or a combination of an integrated current sensor and a wireless voltage sensor can be selected in the computing device, both of which can be used.
  • this application provides a wireless electrical sensor, an electrical parameter measurement and calculation device, a method and a system.
  • the electrical parameter measurement and calculation device is equipped with a wireless module. On the one hand, it receives other electrical signal acquisition units through wireless transmission.
  • the electrical signal (such as current or voltage) transmitted by (such as a current sensor or a voltage sensor), thereby reducing the use of test wires, facilitating the operation of the staff, and avoiding the safety hazards caused by the winding and knotting of the test wires and the damage of the insulation layer of the test wires ;
  • the wireless module realizes the signal sampling time synchronization of the first electrical signal and the second electrical signal, and obtains high-precision electrical parameter information.
  • FIG. 1 is a schematic diagram of an electrical parameter measurement and calculation system according to an embodiment of the present invention.
  • the system includes an electrical parameter measurement computing device and wireless current sensors, wherein a corresponding number of wireless current sensors are equipped according to the number of circuits to measure current. For example, if the number of circuits to measure current is 1, then equip 1 wireless current sensor, and if the number of circuits to measure current is 2, then equip 2 wireless current sensors.
  • Fig. 2 is a schematic structural diagram of a wireless current sensor according to an embodiment of the present invention.
  • the wireless current sensor includes a current acquisition module, an analog-to-digital conversion module and a wireless module.
  • the current collection module collects the current signal of the line and sends the analog current signal to the analog-to-digital conversion module.
  • the analog-to-digital conversion module receives the time signal of the wireless module, and the method for the wireless module to ensure the signal sampling time synchronization of the current signal includes: GNSS (Global Navigation Satellite System, Global Navigation Satellite System) timing; 5G timing; the wireless module sends local clock information to the peer wireless module; or the wireless module receives local clock information from the peer wireless module.
  • GNSS Global Navigation Satellite System, Global Navigation Satellite System
  • the analog-to-digital conversion module converts the analog current signal into a digital current signal under the synchronous signal sampling information, and sends the digital current signal to the wireless module, and the wireless module sends the current signal to the electrical parameter measurement and calculation device.
  • the wireless way for the wireless module to send the current signal includes Bluetooth, 2G, 3G, 4G, 5G, WIFI, sub1G, ZigBee or a custom wireless transmission protocol.
  • Fig. 3 is a schematic structural diagram of another wireless current sensor according to an embodiment of the present invention.
  • the wireless current sensor includes a current acquisition module, an analog-to-digital conversion module and a wireless module, wherein the wireless module includes a wireless transmission unit and a wireless synchronization unit.
  • the current collection module collects the current signal of the line and sends the analog current signal to the analog-to-digital conversion module.
  • the analog-to-digital conversion module receives the time signal of the wireless synchronization unit, wherein the wireless synchronization unit ensures that the signal sampling time synchronization of the current signal includes: GNSS timing; 5G timing; the wireless synchronization unit sends local clock information to the peer wireless synchronization unit; or The wireless synchronization unit receives the local clock information from the peer wireless synchronization unit.
  • the analog-to-digital conversion module converts the analog current signal into a digital current signal under the synchronous signal sampling information, and sends the digital current signal to the wireless transmission unit, and the wireless transmission unit sends the current signal to the electrical parameter measurement and calculation device.
  • the wireless way for the wireless transmission unit to send the current signal includes Bluetooth, 2G, 3G, 4G, 5G, WIFI, sub1G, ZigBee or a custom wireless transmission protocol.
  • Fig. 4 is a schematic structural diagram of an electrical parameter measurement and calculation device according to an embodiment of the present invention.
  • the electrical parameter measurement and calculation device includes a voltage acquisition module, a wireless module, an analog-to-digital conversion module and an electrical parameter calculation module.
  • the wireless module receives the current signal from the wireless current sensor wirelessly and transmits the current signal to the electrical parameter calculation module;
  • the voltage acquisition module collects the voltage signal and transmits the voltage signal to the analog-to-digital conversion module , the analog-to-digital conversion module receives the time signal of the wireless module, converts the analog voltage signal into a digital voltage signal under the synchronous signal sampling information, and sends the digital voltage signal to the electrical parameter calculation module; Signal and voltage signal to calculate electrical parameter information.
  • the wireless way in which the wireless module receives the current signal includes Bluetooth, 2G, 3G, 4G, 5G, WIFI, sub1G, ZigBee or a custom wireless transmission protocol.
  • the way for the wireless module to ensure the signal sampling time synchronization of the current signal and the voltage signal includes: GNSS timing; 5G timing; the wireless module sends local clock information to the peer wireless module; or the wireless module receives information from Local clock information of the peer wireless module.
  • the current signal used to calculate the electrical parameter information comes from a wireless current sensor, and the wireless current sensor sends the collected current signal to the electrical parameter measurement and calculation device in a wireless manner, and the electrical parameter measurement and calculation device
  • the wireless module receives the current signal.
  • the voltage signal used to calculate the electrical parameter information comes from the voltage acquisition module integrated in the electrical parameter measurement and calculation device.
  • the voltage acquisition module obtains the voltage of the circuit through the test line.
  • the voltage acquisition module includes multiple measurement points, and multiple measurement points can collect the voltage of multiple lines by sharing a common voltage reference point.
  • a three-phase three-wire electric energy meter uses one of the voltage lines as the common voltage line.
  • the single-phase watt-hour meter and the three-phase four-wire watt-hour meter use the neutral line as the common voltage line
  • the phase voltammeter in the three-phase three-wire power distribution system uses one of the voltage lines as the common voltage line
  • the phase voltammeter in the three-phase four-wire power distribution system uses the neutral line as the common voltage line, and there are many ways to share the common voltage reference point, so I won’t list them here.
  • the electrical parameter calculation module directly obtains the voltage signal collected by the voltage acquisition module.
  • the voltage acquisition module may be a voltage sensor.
  • Fig. 5 is a schematic structural diagram of another electrical parameter measurement and calculation device according to an embodiment of the present invention.
  • the electrical parameter measurement and calculation device includes a voltage acquisition module, a wireless module, an analog-to-digital conversion module and an electrical parameter calculation module.
  • the wireless module includes a wireless transmission unit and a wireless synchronization unit.
  • the wireless transmission unit wirelessly receives the current signal from the wireless current sensor and transmits the current signal to the electrical parameter calculation module;
  • the voltage acquisition module collects the voltage signal and transmits the voltage signal to the analog-to-digital conversion Module, the analog-to-digital conversion module receives the time signal of the wireless synchronization unit, converts the analog voltage signal into a digital voltage signal under the synchronous signal sampling information, and sends the digital voltage signal to the electrical parameter calculation module;
  • the electrical parameter calculation module according to the received Calculate the electrical parameter information from the current signal and voltage signal.
  • the wireless way in which the wireless transmission unit receives the current signal includes Bluetooth, 2G, 3G, 4G, 5G, WIFI, sub1G, ZigBee or a custom wireless transmission protocol.
  • the way for the wireless synchronization unit to ensure the signal sampling time synchronization of the current signal and the voltage signal includes: GNSS timing; 5G timing; the wireless transmission unit sends local clock information to the peer wireless transmission unit; or wireless The transmission unit receives local clock information from the peer wireless transmission unit.
  • test line layout The requirements for test line layout are different in the process of voltage and current acquisition. For the situation where multiple voltages need to be collected, considering the voltage drop of the line, the voltage at different positions of the line may be different, so the voltage acquisition should be as close as possible to the object under test. For the collection of multiple line currents, since the currents on the same transmission line are the same, the positions for collecting currents can be far apart. Based on such considerations, a wireless current sensor is configured in the electrical parameter measurement and calculation system shown in FIG. The voltage acquisition module directly measures the voltage at the nearest position of the measured object through the test line of the voltage acquisition module, without sending the collected voltage signal wirelessly like the wireless current sensor.
  • the electrical parameter measurement and calculation device integrates a voltage acquisition module instead of using a wireless voltage acquisition module, There is no need to equip the voltage acquisition module with a wireless module, and there is no need to equip the electrical parameter measurement and calculation device with a wireless module corresponding to the voltage acquisition module, thereby greatly reducing the use of wireless modules, reducing the amount of data in communication between devices and the need for synchronization between devices .
  • the wireless current sensor and the electrical parameter measurement computing device realize the sampling time synchronization of the voltage signal and the current signal through a wireless module or a wireless synchronization unit.
  • the wireless module or the wireless synchronization unit of the wireless current sensor and the electrical parameter measurement calculation device can use timing equipment, such as GNSS, 5G modules, etc. to obtain standard time information and accurately realize voltage signal and current signal sampling time synchronization .
  • the wireless module or the wireless synchronizing unit of the wireless current sensor or the electrical parameter measurement computing device adopts a wireless radio frequency module (for example, including Bluetooth, 2G, 3G, 4G, 5G, WIFI, sub1G, ZigBee or custom wireless Transmission protocol and other transmission methods) Send the time information of the local clock to the peer wireless module or wireless synchronization unit, and then use the corresponding algorithm to accurately realize the signal sampling time synchronization, or receive the local clock information from the peer wireless module or wireless synchronization unit Realize signal sampling time synchronization.
  • the adopted wireless module or wireless synchronization unit has the characteristics of small jitter (such as within the range of 10us) and small time delay in wireless transmission of information.
  • the local clock information can be in the form of a series of pulses and/or time stamps, and these pulses can directly control the sampling of the analog-to-digital conversion module, or can control the sampling of the analog-to-digital conversion module after being processed. For example, if the pulse frequency of wireless transmission and reception is lower than the frequency of actual sampling pulses, this operation processing includes frequency multiplication processing.
  • the timestamp can express more information about the local clock. For example, the timestamp may contain specific time information, such as date, hour, minute, second, or some kind of agreed digital serial number, representing the relative time, which is convenient for reaching an agreement with the peer. correct clock synchronization.
  • the time error between the clock information received and restored by the wireless module or wireless synchronization unit at the wireless current sensor end and the local clock information sent by the wireless module or wireless synchronization unit of the electrical parameter measurement calculation device should not exceed 20us, or the electrical parameter measurement calculation device
  • the time error between the clock information received and restored by the wireless module or wireless synchronization unit and the local clock information sent by the wireless module or wireless synchronization unit at the wireless current sensor end should not exceed 20us.
  • the analog-to-digital conversion modules of the wireless current sensor and the electrical parameter measurement and calculation device perform synchronous and equal interval sampling on their respective signals at the same time to realize the synchronization of voltage and current signals, thereby ensuring the accuracy of electrical parameter calculation, for example, The measurement accuracy of power and/or electrical energy is better than 2%.
  • the wireless current sensor and the electrical parameter measuring and calculating device realize the sending and receiving of current signals through a wireless module or a wireless transmission unit, wherein the wireless module or wireless transmission unit can adopt a wireless method Including Bluetooth, 2G, 3G, 4G, 5G, WIFI, sub1G, ZigBee or custom wireless transmission protocols, etc.
  • the wireless modules of the wireless current sensor and the electrical parameter measurement calculation device may be the same or different, and the wireless synchronization unit of the wireless current sensor and the electrical parameter measurement calculation device may be the same or not.
  • the wireless transmission units of the wireless current sensor and the electrical parameter measurement computing device may be the same or different.
  • the present application further provides a method for measuring and calculating an electrical parameter, which includes the following steps.
  • Step 1 receiving current signals wirelessly.
  • the wireless transmission unit of the wireless module of the electrical parameter measurement calculation device receives the current signal from the wireless current sensor wirelessly, and transmits the current signal to the electrical parameter calculation module of the electrical parameter measurement calculation device, wherein the wireless method includes Bluetooth, 2G, 3G, 4G, 5G, WIFI, sub1G, ZigBee or custom wireless transmission protocol.
  • Step 2 collecting voltage signals.
  • the voltage acquisition module of the electrical parameter measurement and calculation device collects the voltage signal, and transmits the voltage signal to the electrical parameter calculation module of the electrical parameter measurement and calculation device.
  • the voltage collection module includes multiple measurement points, and the multiple measurement points can collect the voltages of the multiple lines by sharing a common voltage reference point.
  • Step 3 calculating electrical parameter information according to the current signal and the voltage signal.
  • the electrical parameter calculation module of the electrical parameter measurement and calculation device calculates the electrical parameter information according to the received current signal and voltage signal.
  • the measurement and calculation method of the electrical parameter also includes using GNSS timing or 5G timing to perform voltage signal and current signal sampling time synchronization, or sending local clock information through a custom wireless transmission protocol or receiving the local clock of the peer through a custom wireless transmission protocol
  • the method of information implements voltage signal and current signal sampling time synchronization.
  • the sampling time synchronization of the voltage signal and the current signal is realized through a wireless module or a wireless synchronization unit.
  • the wireless module or the wireless synchronization unit of the wireless current sensor and the electrical parameter measurement calculation device can use timing equipment, such as GNSS, 5G modules, etc. to obtain standard time information and accurately realize voltage signal and current signal sampling time synchronization .
  • the wireless module or the wireless synchronizing unit of the wireless current sensor or the electrical parameter measurement computing device adopts a wireless radio frequency module (for example, including Bluetooth, 2G, 3G, 4G, 5G, WIFI, sub1G, ZigBee or custom wireless Transmission protocol and other transmission methods) Send the time information of the local clock to the peer wireless module or wireless synchronization unit, and then use the corresponding algorithm to accurately realize the signal sampling time synchronization, or receive the local clock information from the peer wireless module or wireless synchronization unit Realize signal sampling time synchronization.
  • the wireless module or wireless synchronization unit has the characteristics of small jitter (such as within the range of 10us) and small delay in wireless transmission of information.
  • the local clock information can be in the form of a series of pulses and/or time stamps, and these pulses can directly control the sampling of the analog-to-digital conversion module, or can control the sampling of the analog-to-digital conversion module after being processed. For example, if the pulse frequency of wireless transmission and reception is lower than the frequency of actual sampling pulses, this operation processing includes frequency multiplication processing.
  • the timestamp can express more information about the local clock. For example, the timestamp may contain specific time information, such as date, hour, minute, second, or some kind of agreed digital serial number, representing the relative time, which is convenient for reaching an agreement with the peer. correct clock synchronization.
  • the time error between the clock information received and restored by the wireless module or wireless synchronization unit at the wireless current sensor end and the local clock information sent by the wireless module or wireless synchronization unit of the electrical parameter measurement calculation device should not exceed 20us, or the electrical parameter measurement calculation device
  • the time error between the clock information received and restored by the wireless module or wireless synchronization unit and the local clock information sent by the wireless module or wireless synchronization unit at the wireless current sensor end should not exceed 20us.
  • the analog-to-digital conversion modules of the wireless current sensor and the electrical parameter measurement and calculation device perform synchronous and equal interval sampling on their respective signals at the same time to realize the synchronization of voltage and current signals, thereby ensuring the accuracy of electrical parameter calculation, for example, The measurement accuracy of power and/or electrical energy is better than 2%.
  • the electrical parameter measurement and calculation system includes a wireless current sensor and an electrical parameter measurement and calculation device, that is, the built-in voltage acquisition module of the electrical parameter measurement and calculation device acquires the voltage signal locally, and through wireless transmission Receive current signals from wireless current sensors.
  • the electrical parameter measurement and calculation system may also include a wireless voltage sensor and an electrical parameter measurement and calculation device, that is, the electric parameter measurement and calculation device has a built-in current acquisition module to obtain current signals locally, and receive signals from the wireless voltage through wireless transmission. The voltage signal of the sensor.
  • the wireless voltage sensor transmits and receives data (for example, a voltage signal) between the wireless module or the wireless transmission unit and the wireless transmission unit of the electrical parameter measurement calculation device; another example, the wireless module or the wireless synchronization unit of the wireless voltage sensor
  • the wireless module or wireless synchronization unit of the electrical parameter measurement and calculation device can use timing equipment, such as GNSS, 5G modules, etc. to obtain standard time information and then accurately realize signal sampling time synchronization, or, the wireless voltage sensor or the electrical parameter measurement calculation device.
  • the wireless module or wireless synchronization unit uses a wireless radio frequency module (for example, including Bluetooth, 2G, 3G, 4G, 5G, WIFI, sub1G, ZigBee or a custom wireless transmission protocol and other transmission methods) to send the time information of the local clock to the opposite wireless module Or the wireless synchronization unit and then through the corresponding algorithm to accurately realize the signal sampling time synchronization or receive the local clock information from the peer wireless module or wireless synchronization unit to realize the signal sampling time synchronization; another example is the analog-to-digital conversion module of the wireless voltage sensor and The analog-to-digital conversion module of the electrical parameter measurement and calculation device converts the analog voltage signal or the analog current signal into a digital voltage signal or a digital current signal under the synchronous signal sampling information.
  • a wireless radio frequency module for example, including Bluetooth, 2G, 3G, 4G, 5G, WIFI, sub1G, ZigBee or a custom wireless transmission protocol and other transmission methods
  • the voltage signal should be collected as close as possible to the place where the detected object obtains the voltage signal.
  • the voltage signal is collected by sharing the reference point of the common voltage signal.
  • the electrical parameter measurement and calculation device Acquisition current signals can be acquired at any position on the line.
  • the current signal can be directly placed on the transmission line through the current loop or current clamp to obtain the current signal, and the voltage signal collected by the electrical parameter measurement and calculation device can be selected to be close to the object to be inspected.
  • the voltage signal is collected in the place of the voltage signal, and the line clamp is reduced to 4 line clamps at the same time, and the acquisition of the three-way voltage signal is completed.
  • the configuration combination of "wireless voltage sensor and electrical parameter measurement and calculation device” will have 3 wireless voltage sensors and 6 clamps, of which 3 clamps share a common voltage reference point, resulting in In the case of crowded wire clips; the configuration combination of "wireless current sensor and electrical parameter measurement and calculation device” reduces the number of wire clips for collecting voltage to four, and there is no common voltage reference point shared by multiple wire clips.
  • the wireless current sensor can be used according to the usage scenario. Select a suitable location to collect current signals, so the configuration combination of "wireless current sensors and electrical parameter measurement and calculation devices" is also more advantageous.
  • wireless current sensors and wireless voltage sensors are collectively referred to as “wireless electrical sensors”.
  • the voltage acquisition module or current acquisition module of the electrical parameter measurement calculation device and the current acquisition module included in the wireless current sensor or wireless voltage sensor Or voltage acquisition modules are collectively referred to as “electrical signal acquisition modules”.
  • the electrical parameter measurement computing device in order to obtain data from the electrical parameter measurement computing device and control the operation of the electrical parameter measurement computing device, can be provided with human-computer interaction equipment.
  • Human-computer interaction equipment includes input devices and output devices.
  • the input device can receive numeric or character information input, and key signal input, such as voice input, voice input, touch screen input, mouse input, and the like.
  • Output devices may include display devices, sound devices, auxiliary lighting devices, and the like.
  • the electrical parameter measurement and calculation device can also communicate with the terminal equipment through wired or wireless data, and the user can perform input and output feedback through the terminal equipment, which is convenient for the user to operate the device.
  • the technical solution of the present invention can be applied to high-precision level equipment with functions such as electric parameter measurement and/or electric energy meter calibration, and can also be applied to low-precision level equipment such as phase volt-ampere testers, and can also be applied to power quality Analyzer, portable PMU synchronous vector measuring device, electricity checker, power analyzer, six-way differential protection vector tester, double clamp grounding resistance tester, storage recorder, portable multi-functional energy meter, oscilloscope, digital multimeter and other equipment middle.
  • Embodiment 1 High-precision level equipment with electric parameter measurement and/or electric energy meter calibration function
  • Fig. 6 is a schematic structural diagram of a high-precision level device with functions of measuring electrical parameters and/or calibrating electric energy meters according to an embodiment of the present invention.
  • the equipment with the function of electric parameter measurement and/or electric energy meter calibration includes electric parameter measurement and calculation device and wireless current sensor (according to the different phases or three phases of the electric energy meter to be tested, equipped with 1 or 3 wireless flow sensor).
  • the electrical parameter measurement calculation device and the wireless current sensor perform signal sampling time synchronization through their respective wireless modules or wireless synchronization units.
  • the electrical parameter measurement calculation device measures the analog voltage signal (1 or 3 voltage signals) connected to the tested electric energy meter, and After being converted into a digital voltage signal by the analog-to-digital conversion module, it is sent to the electrical parameter calculation module.
  • the wireless current sensor measures the analog current signal connected to the tested electric energy meter under the synchronous signal sampling information.
  • Module or wireless transmission unit the wireless module or wireless transmission unit of the electrical parameter measurement computing device transmits the received current information to the electrical parameter calculation module of the electrical parameter measurement computing device.
  • the electrical parameter calculation module calculates standard electrical parameter information (such as voltage, current, phase between voltages, phase between currents, phase between voltage and current, frequency, phase sequence, Active power, reactive power, apparent power, power factor, etc.), while the electric parameter measurement and calculation device reads the electric pulse signal of the electric energy meter under inspection, and calculates the actual electric parameter information of the electric energy meter according to the electric pulse signal, and the electric parameter measurement and calculation The device calculates and processes the standard electric parameter information and the actual electric parameter information to obtain the electric energy measurement error of the electric energy meter under inspection.
  • standard electrical parameter information such as voltage, current, phase between voltages, phase between currents, phase between voltage and current, frequency, phase sequence, Active power, reactive power, apparent power, power factor, etc.
  • the wireless current sensor is used to collect the current signal
  • the electrical parameter measurement and calculation device is used to collect the voltage signal and then calculates the electrical parameter. It is also possible to use the wireless voltage sensor to collect the voltage signal, and the electrical parameter measurement and calculation device to collect the current signal and then calculate The configuration method of electrical parameters.
  • a wireless pulse receiver can also be used to collect pulse signals.
  • the equipment with the function of electric parameter measurement and/or electric energy meter verification can be provided with a human-computer interaction module, and the human-computer interaction module includes an input device and an output device. The user directly interacts with the device with the function of measuring the electrical parameters and/or calibrating the energy meter through the input device and the output device.
  • the device with the function of measuring electric parameters and/or verifying the electric energy meter communicates with the terminal device through wired or wireless data, and the user performs input and output feedback through the terminal device.
  • Fig. 7 is a schematic structural diagram of another high-precision level device with functions of measuring electrical parameters and/or calibrating electric energy meters according to an embodiment of the present invention.
  • the terminal device can communicate with the marketing system through the mobile network.
  • the calibration equipment can also calibrate voltmeter, ammeter, power meter, phase meter and other indicating instruments, as well as various active and reactive energy meters of three-phase three-wire, three-phase four-wire and single-phase.
  • Example 2 Low-precision equipment such as phase voltammetry testers
  • Fig. 8 is a schematic structural diagram of a phase voltammetry tester according to an embodiment of the present invention.
  • the phase voltammeter includes an electrical parameter measurement calculation device and a wireless current sensor (the tested electrical parameters are different, and 1 to 3 wireless current sensors are equipped).
  • the electrical parameter measurement calculation device and the wireless current sensor perform signal sampling time synchronization through their respective wireless modules or wireless synchronization units.
  • the electrical parameter measurement calculation device measures analog voltage signals (1 to 3 voltage signals), and converts them into After the digital voltage signal is sent to the electrical parameter calculation module.
  • the wireless current sensor measures the analog current signal, after being converted into a digital current signal by the analog-to-digital conversion module, it is transmitted to the wireless module or wireless transmission unit of the electrical parameter measurement computing device through the wireless module or wireless transmission unit, and the wireless module of the electrical parameter measurement computing device Or the wireless transmission unit transmits the received current information to the electrical parameter calculation module of the electrical parameter measurement calculation device.
  • the electrical parameter calculation unit completes the measurement of other electrical parameter information (such as phase between voltage, phase between current, phase between voltage and current, frequency, phase sequence, active power, passive power, apparent power, power factor, current vector sum, etc.).
  • the wireless current sensor is used to collect the current signal
  • the electrical parameter measurement and calculation device is used to collect the voltage signal and then calculates the electrical parameter. It is also possible to use the wireless voltage sensor to collect the voltage signal, and the electrical parameter measurement and calculation device to collect the current signal and then calculate The configuration method of electrical parameters.
  • the phase voltammeter can be provided with a human-computer interaction module.
  • the human-computer interaction module includes input devices and output devices. The user interacts directly with the phase voltammeter through input devices and output devices.
  • the instrument has the above-mentioned measurement functions, it is widely used, mainly including: discrimination of inductive and capacitive circuits; phase relationship between CT groups of relay protection; inspection of transformer wiring groups; Running speed inspection; secondary circuit inspection; used as a leakage current meter, etc.
  • Embodiment 3 power quality analyzer
  • a power quality analyzer is a device for measuring the power quality of a power system.
  • Fig. 9 is a schematic structural diagram of a power quality analyzer according to an embodiment of the present invention.
  • the power quality analyzer includes an electrical parameter measurement computing device and a wireless current sensor.
  • the wireless current sensor collects 4 current signals, which are the current signals of the live wires L1, L2, L3 and the neutral wire
  • the electrical parameter measurement and calculation device collects 4 voltage signals, which are the voltage signals of the live wires L1, L2, L3 and the neutral wire.
  • the electrical parameter measurement and calculation device and the wireless current sensor perform signal sampling time synchronization through their respective wireless modules or wireless synchronization units.
  • the electrical parameter measurement and calculation device measures the analog voltage signal connected to the object under test, and converts it into a digital voltage through an analog-to-digital conversion module.
  • the wireless current sensor measures the analog current signal connected to the detected object under the synchronous signal sampling information, and after being converted into a digital current signal by the analog-to-digital conversion module, it is transmitted to the wireless module of the electrical parameter measurement computing device through the wireless module or wireless transmission unit Or a wireless transmission unit, the wireless module or the wireless transmission unit of the electrical parameter measurement calculation device transmits the received current information to the electrical parameter calculation module of the electrical parameter measurement calculation device.
  • the electric parameter calculation module calculates the power quality information according to the voltage signal tested by the electric parameter measurement and calculation device and the received current signal.
  • the power quality analyzer can measure and monitor power quality online in real time.
  • Power quality monitoring indicators include: voltage fluctuation and flicker, frequency deviation, harmonics, inter-harmonics, voltage deviation, overvoltage, overcurrent, voltage sag and short-term interruption, three-phase voltage unbalance, current unbalance, sudden It can be widely used in real-time monitoring and measurement of power quality in power generation, supply and distribution systems.
  • Embodiment 4 Portable PMU synchrophasor measurement device
  • the portable PMU synchronization vector measurement device is a device for measuring and outputting synchronization vectors and performing dynamic recording.
  • Fig. 10 is a schematic structural diagram of a portable PMU synchrophasor measurement device according to an embodiment of the present invention.
  • the portable PMU synchrophasor measurement device includes an electrical parameter measurement calculation device and a wireless current sensor.
  • the wireless current sensor collects 3-way current signals
  • the electrical parameter measurement and calculation device collects 3-way voltage signals.
  • the electrical parameter measurement and calculation device and the wireless current sensor perform signal sampling time synchronization through their respective wireless modules or wireless synchronization units.
  • the electrical parameter measurement and calculation device measures the analog voltage signal connected to the object under test, and converts it into a digital voltage through an analog-to-digital conversion module. After the signal is sent to the electrical parameter calculation module.
  • Embodiment 5 Electricity inspection instrument
  • the wireless current sensor measures the analog current signal connected to the detected object under the synchronous signal sampling information, and after being converted into a digital current signal by the analog-to-digital conversion module, it is transmitted to the wireless module of the electrical parameter measurement computing device through the wireless module or wireless transmission unit Or a wireless transmission unit, the wireless module or the wireless transmission unit of the electrical parameter measurement calculation device transmits the received current information to the electrical parameter calculation module of the electrical parameter measurement calculation device.
  • the electrical parameter calculation module calculates information such as voltage, current, power, phase, and unbalance according to the voltage signal tested by the electrical parameter measurement and calculation device and the received current signal.
  • a power analyzer is a device used to measure the power curve, power consumption, and operating efficiency of equipment.
  • the power analyzer includes an electrical parameter measurement computing device and a wireless current sensor.
  • the wireless current sensor collects 1 to 4 current signals
  • the electrical parameter measurement and calculation device collects 1 to 4 voltage signals.
  • the electrical parameter measurement and calculation device and the wireless current sensor perform signal sampling time synchronization through their respective wireless modules or wireless synchronization units.
  • the electrical parameter measurement and calculation device measures the analog voltage signal connected to the object under test, and converts it into a digital voltage through an analog-to-digital conversion module. After the signal is sent to the electrical parameter calculation module.

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Abstract

一种电参量测量计算装置、电参量测量计算方法及系统和无线电气传感器，该计算装置包括第一电气信号采集模块、第一无线模块和电参量计算模块，其中：第一无线模块通过无线方式接收第一电气信号并将第一电气信号传输至电参量计算模块；第一电气信号采集模块采集第二电气信号并将第二电气信号传输至电参量计算模块；以及电参量计算模块根据第一电气信号以及第二电气信号计算电参量信息。根据无线电气传感器、电参量测量计算装置、方法及系统，首先减少测试线的使用，其次减少所使用的无线模块的数量，最后同步信号采样的时间信息，实现高精度的电参量测量。

Description

无线电气传感器、电参量测量计算装置、方法及系统 技术领域
本申请涉及电力领域，尤其涉及无线电气传感器、电参量测量计算装置、方法及系统。
背景技术
传统的电能表现场校验仪(或者电参量测量设备)需要配备1至3把电流钳(或者电流传感器)，测试的电流信号通过导线传回到电能表现场校验仪。然而，电流钳的测试线长2米左右，测试距离受限，多个电流钳的测试线会缠绕打结，给工作人员带来不便，同时测试线的绝缘层极易被人为因素或自然因素破坏，将会出现漏电现象或相间短路的严重后果。目前的电能表现场校验仪还无法做到电流钳无线采集电流信号，至于涉及需要多把电流钳同步采集电流信号进行无线传输更是未见。
发明内容
针对现有技术中的问题，本申请提供了一种无线电气传感器、电参量测量计算装置、方法及系统，在电参量测量计算装置中配备无线模块，通过无线传输的方式接收其他电气采集单元(例如电流传感器或电压传感器)传输的电气信号(例如电流或电压)，从而减少测试线的使用。
根据本发明的第一个方面，提供一种电参量测量计算装置，其包括第一电气信号采集模块、第一无线模块和电参量计算模块，其中：
所述第一无线模块通过无线方式接收第一电气信号并将所述第一电气信号传输至所述电参量计算模块；
所述第一电气信号采集模块采集第二电气信号并将所述第二电气信号传输至所述电参量计算模块；以及
所述电参量计算模块根据所述第一电气信号以及所述第二电气信号计算电参量信息。
根据本发明的第二个方面，提供一种电参量的测量计算方法，其包括：
通过无线方式接收第一电气信号；
采集第二电气信号；以及
根据所述第一电气信号以及所述第二电气信号计算电参量信息。
根据本发明的第三个方面，提供一种无线电气传感器，其包括：
第二电气信号采集模块，用于采集第一电气信号；以及
第二无线模块，用于接收所采集的第一电气信号并通过无线方式发送所采集的第一电气信号。
根据本发明的第四个方面，提供一种电参量测量计算系统，包括如第一个方面所述的电参量测量计算装置和如第三个方面所述的无线电气传感器。
根据本发明提供的无线电气传感器、电参量测量计算装置、方法及系统，产生的有益效果包括：
(1)采用无线模块接收电气信号，改变了行业中一贯采用有线电流/电压传感器采集电流/电压信号的做法，省去测试线的使用，让电流和电压测试点的距离不受电缆长度的限制，从而选择一个最佳获取信号的点进行采集，使工作人员操作更简便，同时避免测试线缠绕打结以及测试线绝缘层被破坏导致的安全隐患。
(2)电参量测量计算装置中集成了一部分电气信号的采集模块，将电气信号的采集和电气信号的传输在装置内完成，与传统的电参量测量设备相比，省去了测试线，进一步减少了信号传输造成的延迟和缺失，与采用无线模块传输的电气信号相比，这部分电气信号的传输无需使用的无线模块，这样整个设备的无线传输量减少50％，功耗降低，体积减小，使得整个电参量测量计算装置或系统的布局更加简洁，降低系统的复杂度，系统内各模块之间的通信更加简单高效，并减少系统的成本。
(3)电参量测量计算装置和无线电气传感器的无线模块之间或无线同步单元之间共享同步的信号采样时间信息，实现第一电气信号和第二电气信号的同步采样。无线模块或无线同步单元采用通用的GNSS授时或5G授时，可以确保接收的时间源一致。无线模块或无线同步单元采用脉冲和/或时间戳形式的本地时钟信息时，具备信息无线传输抖动(jitter)小(如在10us范围以内)、时延小的特征，一端接收并还原的时钟信息和发送的本地时钟信息在时间上的误差不超过20us，从而获得高精度的电参量信息，例如，功率和/或电能的测量准确度优于2％。
(4)无线模块或无线同步单元支持采用本地时钟信息进行信号采样时间信息同步，避免了在环境恶劣情况下接收不到卫星授时，导致设备不能使用的情形。
(5)无线模块或无线传输单元支持采用自定义无线传输协议进行信号无线传输，避免了在环境恶劣情况下接收不到网络信号，导致设备不能使用的情形。
(6)电参量测量计算装置中集成的电气信号采集模块可以是电压采集模块也可以是电流采集模块，用户可以根据实际场景需要进行灵活选择。
(7)电参量测量计算装置的电压采集模块能够以共用公共电压参考点的方式采集多个线路的电压，适用范围更加广泛，支持单相电能表、三相三线电能表、三相四线电能表、三相三线配电系统中相位伏安表和三相四线配电系统中相位伏安表等。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附 图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，还可以根据这些附图获得其他的附图，而并不超出本申请要求保护的范围。
图1是根据本发明实施例的电参量测量计算系统的示意图。
图2是根据本发明实施例的一种无线电流传感器的结构示意图。
图3是根据本发明实施例的另一种无线电流传感器的结构示意图。
图4是根据本发明实施例的一种电参量测量计算装置的结构示意图。
图5是根据本发明实施例的另一种电参量测量计算装置的结构示意图。
图6是根据本发明实施例的一种具有电参量测量和/或电能表校验功能的高精度等级设备的结构示意图。
图7是根据本发明实施例的另一种具有电参量测量和/或电能表校验功能的高精度等级设备的结构示意图。
图8是根据本发明实施例的一种相位伏安测试仪的结构示意图。
图9是根据本发明实施例的一种电能质量分析仪的结构示意图。
图10是根据本发明实施例的一种便携式PMU同步相量测量装置的结构示意图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
本发明所述的电参量测量计算装置，可以是任一种测量用电检测的设备，包括但不限于电能表校验仪、相位伏安表、功率分析仪、便携式PMU同步向量测量装置、电能质量分析仪、用电检查仪、六路差动保护矢量测试仪、双钳接地电阻测试仪、存储记录仪、便携式多功能电能表、示波器、数字万用表等。
本发明所述的无线电气传感器，可以是任一种采集电压和/或电流信号的传感器，包括但不限于电流钳、柔性电流探头、柔性罗氏线圈等。
以下是本发明的发明构思过程：
传统的电参量测量计算装置使用电压测试线和电流测试线与被检对象进行连接。电压测试线的端子端连接电参量测量计算装置，鳄鱼夹端连接被检对象获取电压信号。电流测试线的端子端连接电参量测量计算装置，电流钳端连接被检对象获取电流信号。电压测试线和电 流测试线线长2米左右，测试线在连接时找到对应的端子或夹子费时费力，整套设备连接后，现场测试线较多，查找问题也困难。
改进1，基于传统做法中测试线较多，发明人提出无线的改进方案，将每根测试线做成传感器设备，例如整套设备包括3个电压传感器(6个线夹)、3个电流传感器和计算装置，对应每个传感器设备需要1个无线模块与计算装置完成信号无线传输和信号时间同步的功能，这样整套设备虽然测试线减少，但是无线模块数量较多，传输量大，带宽高，功耗大。此外电流信号可以做成电流环或电流钳直接套在输电线上获取电流信号，但是电压信号采用共用公共电压参考点的接线方式，这样公共电压参考点出现三个电压传感器线夹共用情况，造成线夹拥挤等情况。
改进2，在改进1的基础上，发明人考虑减少无线模块数量同时解决线夹拥挤的可行方案。如果将3个电流传感器集成1个电流传感器，无线模块数量减少2个；如果将3个电压传感器集成1个电压传感器，无线模块数量减少2个，同时，电压传感器的6个线夹可以减少到4个线夹。基于这样的考量，发明人将3个电压传感器集成在1个电压传感器进行完成，即整套设备包括1个电压传感器、3个电流传感器和计算装置，这样无线模块数量减少2个，电压传感器的6个线夹减少到4个线夹，完成3路电压信号的采集，节省了测量信号点。虽然这个方案在改进1的基础上有了进一步改进，电压传感器数量减少2个，对应的无线模块数量减少2个，但是总的电压信号数据传输量没有减少，仍存在带宽高，功耗大的问题。
改进3，在改进2的基础上，为了进一步减少电压信号数据传输量大的问题，发明人考虑将计算装置与其中的传感器进行集成，这样这部分传感器产生的数据不需要进行无线传输。一方面，考虑数据传输量的不同，电压传感器传输的是3路电压信号，1个电流传感器传输的是1路电流信号，基于数据传输量的考虑，计算装置中选择集成电压传感器较为高效。另一方面，考虑电压与电流采集过程中对测试线布置的需求不同，对于需要采集多路电压的情形，考虑到线路的压降，线路不同位置的电压可能不同，因此电压采集尽可能选择在距离被测对象就近的位置采集多路电压，而对于多个线路电流的采集，由于同一输电线路上电流相同，采集电流的位置可以相隔很远，基于这样的考量，计算装置中选择集成电压传感器。因此形成了现有的发明构思方案，即整套设备包括3个电流传感器和计算装置，电流传感器将所采集的电流信号通过无线模块发送至计算装置，而计算装置中集成了电压采集模块，通过电压采集模块的测试线直接测量被测对象就近位置的电压，这样整套设备无线模块由原来的4个减少到3个，但是信号的传输量减少了50％，使得整套设备传输效率大大提升。
在需要采集1路电气信号的情况下，计算装置中选择集成电压传感器与无线电流传感器的 组合或选择集成电流传感器与无线电压传感器的组合，这两种方案均可采用。
基于以上的发明构思，本申请提供一种无线电气传感器、电参量测量计算装置、方法及系统，在电参量测量计算装置中配备无线模块，一方面，通过无线传输的方式接收其他电气信号采集单元(例如电流传感器或电压传感器)传输的电气信号(例如电流或电压)，从而减少测试线的使用，方便工作人员的操作，同时避免测试线缠绕打结以及测试线绝缘层被破坏导致的安全隐患；另一方面，无线模块实现第一电气信号和第二电气信号的信号采样时间同步，获得了高精度的电参量信息。
图1是根据本发明实施例的电参量测量计算系统的示意图。如图1所示，该系统包括电参量测量计算装置和无线电流传感器，其中，根据所要测量电流的电路数量，配备相应数量的无线电流传感器。例如，如果所要测量电流的电路数量为1路，则配备1个无线电流传感器，而如果所要测量电流的电路数量为2路，则配备2个无线电流传感器。
图2是根据本发明实施例的一种无线电流传感器的结构示意图。如图2所示，该无线电流传感器包括电流采集模块、模拟数字转换模块和无线模块。电流采集模块采集线路的电流信号并将模拟电流信号发送至模拟数字转换模块。模拟数字转换模块接收无线模块的时间信号，其中，无线模块保证电流信号的信号采样时间同步的方式包括：GNSS(Global Navigation Satellite System，全球导航卫星系统)授时；5G授时；无线模块发送本地时钟信息到对端无线模块；或无线模块接收来自对端无线模块的本地时钟信息。
模拟数字转换模块在同步的信号采样信息下将模拟电流信号转换为数字电流信号，并将数字电流信号发送至无线模块，无线模块将该电流信号发送至电参量测量计算装置。在一个实施例中，无线模块发送电流信号的无线方式包括蓝牙、2G、3G、4G、5G、WIFI、sub1G、ZigBee或自定义无线传输协议。
图3是根据本发明实施例的另一种无线电流传感器的结构示意图。如图3所示，该无线电流传感器包括电流采集模块、模拟数字转换模块和无线模块，其中无线模块包括无线传输单元和无线同步单元。电流采集模块采集线路的电流信号并将模拟电流信号发送至模拟数字转换模块。模拟数字转换模块接收无线同步单元的时间信号，其中，无线同步单元保证电流信号的信号采样时间同步的方式包括：GNSS授时；5G授时；无线同步单元发送本地时钟信息到对端无线同步单元；或无线同步单元接收来自对端无线同步单元的本地时钟信息。
模拟数字转换模块在同步的信号采样信息下将模拟电流信号转换为数字电流信号，并将数字电流信号发送至无线传输单元，无线传输单元将该电流信号发送至电参量测量计算装置。在一个实施例中，无线传输单元发送电流信号的无线方式包括蓝牙、2G、3G、4G、5G、WIFI、 sub1G、ZigBee或自定义无线传输协议。
图4是根据本发明实施例的一种电参量测量计算装置的结构示意图。如图4所示，该电参量测量计算装置包括电压采集模块、无线模块、模拟数字转换模块和电参量计算模块。在图4所示的实施例中，无线模块通过无线方式接收来自无线电流传感器的电流信号并将电流信号传输至电参量计算模块；电压采集模块采集电压信号并将电压信号传输至模拟数字转换模块，模拟数字转换模块接收无线模块的时间信号，在同步的信号采样信息下将模拟电压信号转换为数字电压信号，并将数字电压信号发送至电参量计算模块；电参量计算模块根据所接收的电流信号以及电压信号计算电参量信息。
在图4所示的实施例中，其中，无线模块接收电流信号的无线方式包括蓝牙、2G、3G、4G、5G、WIFI、sub1G、ZigBee或自定义无线传输协议。
在图4所示的实施例中，无线模块保证电流信号和电压信号的信号采样时间同步的方式包括：GNSS授时；5G授时；无线模块发送本地时钟信息到对端无线模块；或无线模块接收来自对端无线模块的本地时钟信息。
在图4所示的实施例中，用于计算电参量信息的电流信号来自无线电流传感器，无线电流传感器将所采集的电流信号通过无线方式发送给电参量测量计算装置，电参量测量计算装置的无线模块接收该电流信号。在图4所示的实施例中，用于计算电参量信息的电压信号来自电参量测量计算装置内部集成的电压采集模块，电压采集模块通过测试线获得电路的电压，对于需要测量多个线路电压的情形，电压采集模块包括多个测量点，多个测量点能够以共用公共电压参考点的方式采集多个线路的电压，例如，三相三线电能表是采用其中一个电压线作为公共电压线，单相电能表和三相四线电能表是采用零线作为公共电压线，三相三线配电系统中相位伏安表采用其中一个电压线作为公共电压线，三相四线配电系统中相位伏安表采用零线作为公共电压线，“共用公共电压参考点的方式”非常多，在此不一一列举。电参量计算模块直接获取电压采集模块采集的电压信号。其中，该电压采集模块可以是电压传感器。
图5是根据本发明实施例的另一种电参量测量计算装置的结构示意图。如图5所示，该电参量测量计算装置包括电压采集模块、无线模块、模拟数字转换模块和电参量计算模块。其中，无线模块包括无线传输单元和无线同步单元。在图5所示的实施例中，无线传输单元通过无线方式接收来自无线电流传感器的电流信号并将电流信号传输至电参量计算模块；电压采集模块采集电压信号并将电压信号传输至模拟数字转换模块，模拟数字转换模块接收无线同步单元的时间信号，在同步的信号采样信息下将模拟电压信号转换为数字电压信号，并将数字电压信号发送至电参量计算模块；电参量计算模块根据所接收的电流信号以及电压信 号计算电参量信息。
在图5所示的实施例中，其中，无线传输单元接收电流信号的无线方式包括蓝牙、2G、3G、4G、5G、WIFI、sub1G、ZigBee或自定义无线传输协议。
在图5所示的实施例中，无线同步单元保证电流信号和电压信号的信号采样时间同步的方式包括：GNSS授时；5G授时；无线传输单元发送本地时钟信息到对端无线传输单元；或无线传输单元接收来自对端无线传输单元的本地时钟信息。
电压与电流采集过程中对测试线布置的需求不同，对于需要采集多路电压的情形，考虑到线路的压降，线路不同位置的电压可能不同，因此电压采集尽可能选择在距离被测对象就近的位置采集多路电压，而对于多个线路电流的采集，由于同一输电线路上电流相同，采集电流的位置可以相隔很远。基于这样的考量，本发明图1所示的电参量测量计算系统中配置了无线电流传感器，将所采集的电流信号通过无线模块发送至电参量测量计算装置，而电参量测量计算装置中集成了电压采集模块，通过电压采集模块的测试线直接测量被测对象就近位置的电压，无需如同无线电流传感器那样将采集的电压信号通过无线方式发送过来。这样，由于电压采集的特点，在电参量测量计算装置这一端不会产生测试线缠绕打结的问题，另外，由于电参量测量计算装置中集成了电压采集模块，而不是采用无线电压采集模块，无需为电压采集模块配备无线模块，也无需在电参量测量计算装置中配备与电压采集模块对应的无线模块，从而大大减少无线模块的使用，减少了设备间通信的数据量和设备间同步的需求。
如上所述，在图2至图5所示的实施例中，无线电流传感器和电参量测量计算装置通过无线模块或无线同步单元实现电压信号和电流信号的采样时间同步。在一个实施例中，无线电流传感器和电参量测量计算装置的无线模块或无线同步单元可以使用授时设备，例如GNSS、5G模块等分别得到标准时间信息后精确地实现电压信号和电流信号采样时间同步。在另一个实施例中，无线电流传感器或电参量测量计算装置的无线模块或无线同步单元采用无线射频模块(例如，包括蓝牙、2G、3G、4G、5G、WIFI、sub1G、ZigBee或自定义无线传输协议等传输方式)发送本地时钟的时间信息到对端无线模块或无线同步单元后再分别通过相应算法精确地实现信号采样时间同步，或者接收来自对端无线模块或无线同步单元的本地时钟信息实现信号采样时间同步。所采用的无线模块或无线同步单元具备信息无线传输抖动(jitter)小(如在10us范围以内)、时延小的特征。本地时钟信息可以表现为一系列脉冲和/或时间戳的形式，这些脉冲可以直接控制模拟数字转换模块的采样，也可以经过运算处理后控制模拟数字转换模块的采样。例如，无线收发的脉冲频率低于实际采样脉冲的频率，这个运算处理就包括倍频处理。时间戳可以表达更多关于本地时钟的信息，例如，时间戳可能包含具体的时间信息，比如日 期、时、分、秒，或者是某种约定的数字序号，代表相对时间，便于与对端达成正确的时钟同步。无线电流传感器端的无线模块或无线同步单元接收并还原的时钟信息和电参量测量计算装置的无线模块或无线同步单元发送的本地时钟信息在时间上的误差不应超过20us，或者电参量测量计算装置的无线模块或无线同步单元接收并还原的时钟信息和无线电流传感器端的无线模块或无线同步单元发送的本地时钟信息在时间上的误差不应超过20us。这样，无线电流传感器和电参量测量计算装置的模拟数字转换模块在同一个时刻分别对各自的信号进行同步等间隔采样，实现电压和电流信号的同步，从而保证电参量计算的准确性，例如，功率和/或电能的测量准确度优于2％。
在图2至图5所示的实施例中，无线电流传感器和电参量测量计算装置通过无线模块或无线传输单元实现电流信号的发送和接收，其中，无线模块或无线传输单元可以采用的无线方式包括蓝牙、2G、3G、4G、5G、WIFI、sub1G、ZigBee或自定义无线传输协议等。
在图2至图5所示的实施例中，无线电流传感器和电参量测量计算装置的无线模块可以相同也可以不相同，无线电流传感器和电参量测量计算装置的无线同步单元可以相同也可以不相同，无线电流传感器和电参量测量计算装置的无线传输单元可以相同也可以不相同。
基于上述电参量测量计算装置的结构，本申请还提供一种电参量的测量计算方法，该方法包括如下步骤。
步骤1，通过无线方式接收电流信号。
电参量测量计算装置的无线模块的无线传输单元通过无线方式接收来自无线电流传感器的电流信号，并将该电流信号传输至电参量测量计算装置的电参量计算模块，其中，该无线方式包括蓝牙、2G、3G、4G、5G、WIFI、sub1G、ZigBee或自定义无线传输协议。
步骤2，采集电压信号。
电参量测量计算装置的电压采集模块采集电压信号，并将该电压信号传输至电参量测量计算装置的电参量计算模块。在一个实施例中，当需要采集多个线路的电压时，电压采集模块包括多个测量点，多个测量点能够以共用公共电压参考点的方式采集多个线路的电压。
步骤3，根据所述电流信号以及所述电压信号计算电参量信息。
电参量测量计算装置的电参量计算模块根据所接收的电流信号以及电压信号计算电参量信息。
在电参量测量计算装置和无线电流传感器进行信号采集和传输之前，二者需要保持信号采样时间同步。这样，该电参量的测量计算方法还包括采用GNSS授时或5G授时执行电压信号和电流信号采样时间同步，或者通过自定义无线传输协议发送本地时钟信息或者通过自 定义无线传输协议接收对端本地时钟信息的方式执行电压信号和电流信号采样时间同步。
电压信号和电流信号采样时间同步通过无线模块或无线同步单元实现。在一个实施例中，无线电流传感器和电参量测量计算装置的无线模块或无线同步单元可以使用授时设备，例如GNSS、5G模块等分别得到标准时间信息后精确地实现电压信号和电流信号采样时间同步。在另一个实施例中，无线电流传感器或电参量测量计算装置的无线模块或无线同步单元采用无线射频模块(例如，包括蓝牙、2G、3G、4G、5G、WIFI、sub1G、ZigBee或自定义无线传输协议等传输方式)发送本地时钟的时间信息到对端无线模块或无线同步单元后再分别通过相应算法精确地实现信号采样时间同步，或者接收来自对端无线模块或无线同步单元的本地时钟信息实现信号采样时间同步。无线模块或无线同步单元具备信息无线传输抖动(jitter)小(如在10us范围以内)、时延小的特征。本地时钟信息可以表现为一系列脉冲和/或时间戳的形式，这些脉冲可以直接控制模拟数字转换模块的采样，也可以经过运算处理后控制模拟数字转换模块的采样。例如，无线收发的脉冲频率低于实际采样脉冲的频率，这个运算处理就包括倍频处理。时间戳可以表达更多关于本地时钟的信息，例如，时间戳可能包含具体的时间信息，比如日期、时、分、秒，或者是某种约定的数字序号，代表相对时间，便于与对端达成正确的时钟同步。无线电流传感器端的无线模块或无线同步单元接收并还原的时钟信息和电参量测量计算装置的无线模块或无线同步单元发送的本地时钟信息在时间上的误差不应超过20us，或者电参量测量计算装置的无线模块或无线同步单元接收并还原的时钟信息和无线电流传感器端的无线模块或无线同步单元发送的本地时钟信息在时间上的误差不应超过20us。这样，无线电流传感器和电参量测量计算装置的模拟数字转换模块在同一个时刻分别对各自的信号进行同步等间隔采样，实现电压和电流信号的同步，从而保证电参量计算的准确性，例如，功率和/或电能的测量准确度优于2％。
在图1至图5所示的实施例中，电参量测量计算系统包括无线电流传感器和电参量测量计算装置，即电参量测量计算装置内置电压采集模块在本地获取电压信号，而通过无线传输方式接收来自无线电流传感器的电流信号。在另一个实施例中，电参量测量计算系统还可以包括无线电压传感器和电参量测量计算装置，即电参量测量计算装置内置电流采集模块在本地获取电流信号，而通过无线传输方式接收来自无线电压传感器的电压信号。“无线电压传感器和电参量测量计算装置”的配置组合与“无线电流传感器和电参量测量计算装置”配置组合的主要不同在于电气信号采集，一个通过无线电流传感器采集电流信号，而另一个通过无线电压传感器采集电压信号，而数据发送接收、设备同步、电参量的计算过程、模数转换方面等基本类似。例如，无线电压传感器通过无线模块或无线传输单元与电参量测量计算装置的无线传输单元之间进行数据(例如，电压信号)的发送和接收；再如，无线电压传感器的 无线模块或无线同步单元与电参量测量计算装置的无线模块或无线同步单元可以使用授时设备，例如GNSS、5G模块等分别得到标准时间信息后精确地实现信号采样时间同步，或者，无线电压传感器或电参量测量计算装置的无线模块或无线同步单元采用无线射频模块(例如，包括蓝牙、2G、3G、4G、5G、WIFI、sub1G、ZigBee或自定义无线传输协议等传输方式)发送本地时钟的时间信息到对端无线模块或无线同步单元后再分别通过相应算法精确地实现信号采样时间同步或者接收来自对端无线模块或无线同步单元的本地时钟信息实现信号采样时间同步；又如，无线电压传感器的模拟数字转换模块以及电参量测量计算装置的模拟数字转换模块在同步的信号采样信息下将模拟电压信号或模拟电流信号转换为数字电压信号或数字电流信号。
“无线电压传感器和电参量测量计算装置”的配置组合与“无线电流传感器和电参量测量计算装置”配置组合相比，“无线电压传感器和电参量测量计算装置”的配置组合，由于电压信号在传输过程中会有压降，导致电压测量值出现较大误差，应尽可能靠近被检对象获取电压信号的地方采集电压信号，电压信号采集时是通过共用公共电压信号参考点的方式获取，这样对于需要3个无线电压传感器的情形，公共电压参考点出现3个无线电压传感器的3个线夹共用情况，造成线夹拥挤等情况，而同一条输电线上电流大小相同，电参量测量计算装置采集电流信号可以在线路的任何位置获取。对于“无线电流传感器和电参量测量计算装置”的配置组合，电流信号可以通过电流环或电流钳直接套在输电线上获取电流信号，电参量测量计算装置采集电压信号可以选择靠近被检对象获取电压信号的地方采集电压信号，同时线夹减少到4个线夹，完成三路电压信号的采集。
两种配置组合相比，在需要采集1路电气信号的情况下，两种方案均可采用。在需要采集多路电气信号的情况下，“无线电压传感器和电参量测量计算装置”的配置组合会出现3个无线电压传感器6个线夹，其中3个线夹共用公共电压参考点的，造成线夹拥挤的情况；“无线电流传感器和电参量测量计算装置”的配置组合采集电压的线夹减少到4个，不存在多个线夹共用公共电压参考点的，无线电流传感器可以根据使用场景选择合适位置采集电流信号，因此“无线电流传感器和电参量测量计算装置”的配置组合也更有优势。在涉及电能表校验的过程中，需要同时采集被检电能表的脉冲信号，并将脉冲信号发送至电参量测量计算装置进行运算，“无线电流传感器和电参量测量计算装置”的配置组合也更有优势。
在本申请中，将无线电流传感器和无线电压传感器统称为“无线电气传感器”，这样，将电参量测量计算装置的电压采集模块或电流采集模块以及无线电流传感器或无线电压传感器包含的电流采集模块或电压采集模块统称为“电气信号采集模块”。
在图4和图5所示的实施例中，为了便于从电参量测量计算装置获得数据以及对电参量测量计算装置的操作控制，电参量测量计算装置可设置有人机交互设备。人机交互设备包括输入装置和输出装置。输入装置可接收输入的数字或字符信息，以及键信号输入，例如声输入、语音输入、触摸屏输入、鼠标输入等。输出装置可包括显示设备、声音设备、辅助照明设备等。电参量测量计算装置还可以通过有线或无线方式与终端设备数据互通，用户通过终端设备进行输入和输出反馈，方便用户对装置进行操作。
本发明的技术方案可以应用在具有电参量测量和/或电能表校验等功能的高精度等级设备上，也可以应用在相位伏安测试仪等低精度等级设备上，还可以应用在电能质量分析仪、便携式PMU同步向量测量装置、用电检查仪、功率分析仪、六路差动保护矢量测试仪、双钳接地电阻测试仪、存储记录仪、便携式多功能电能表、示波器、数字万用表等设备中。
下面举出多个实施例，说明本发明的方案在具体设备上的应用。
实施例1：具有电参量测量和/或电能表校验功能的高精度等级设备
图6是根据本发明实施例的一种具有电参量测量和/或电能表校验功能的高精度等级设备的结构示意图。如图6所示，具有电参量测量和/或电能表校验功能的设备包括电参量测量计算装置和无线电流传感器(根据被检电能表单相或三相的不同，配备1个或3个无线电流传感器)。电参量测量计算装置和无线电流传感器通过各自的无线模块或无线同步单元进行信号采样时间同步，电参量测量计算装置测量被检电能表接入的模拟电压信号(1或3路电压信号)，并经过模拟数字转换模块转换成数字电压信号后，发送至电参量计算模块。无线电流传感器在同步的信号采样信息下测量被检电能表接入的模拟电流信号，经过模拟数字转换模块转换成数字电流信号后，通过无线模块或无线传输单元传输至电参量测量计算装置的无线模块或无线传输单元，电参量测量计算装置的无线模块或无线传输单元将接收的电流信息传输至电参量测量计算装置的电参量计算模块。电参量计算模块根据电参量测量计算装置测试的电压信号和接收的电流信号计算标准的电参量信息(如电压、电流、电压间相位、电流间相位、电压与电流间相位、频率、相序、有功功率、无功功率、视在功率、功率因数等)，同时电参量测量计算装置读取被检电能表的电脉冲信号，根据电脉冲信号计算电能表的实际电参量信息，电参量测量计算装置对标准电参量信息和实际电参量信息经过计算、处理得出被检电能表电能计量误差。
在本实施例中，采用无线电流传感器采集电流信号、电参量测量计算装置采集电压信号然后计算电参量的配置方式，还可以采用无线电压传感器采集电压信号、电参量测量计算装置采集电流信号然后计算电参量的配置方式。在本实施例中，还可以采用无线脉冲接收器采 集脉冲信号。
在一个可选实施例中，具有电参量测量和/或电能表校验功能的设备可设置有人机交互模块，人机交互模块包括输入装置和输出装置。用户通过输入装置和输出装置直接与具有电参量测量和/或电能表校验功能的设备进行交互。
在另一个可选实施例中，具有电参量测量和/或电能表校验功能的设备通过有线方式或无线方式与终端设备数据互通，用户通过终端设备进行输入和输出反馈。
图7是根据本发明实施例的另一种具有电参量测量和/或电能表校验功能的高精度等级设备的结构示意图。如图7所示，终端设备可通过移动网络与营销系统数据互通。
本校验设备还可校验电压表、电流表、功率表、相位表等指示仪表以及三相三线、三相四线、单相的各种有功和无功电能表。
实施例2：相位伏安测试仪等低精度等级设备
图8是根据本发明实施例的一种相位伏安测试仪的结构示意图。如图8所示，相位伏安表包括电参量测量计算装置和无线电流传感器(被测试的电参量不同，配备1至3个无线电流传感器)。电参量测量计算装置和无线电流传感器通过各自的无线模块或无线同步单元进行信号采样时间同步，电参量测量计算装置测量模拟电压信号(1至3路电压信号)，并经过模拟数字转换模块转换成数字电压信号后，发送至电参量计算模块。无线电流传感器测量模拟电流信号，经过模拟数字转换模块转换成数字电流信号后，通过无线模块或无线传输单元传输至电参量测量计算装置的无线模块或无线传输单元，电参量测量计算装置的无线模块或无线传输单元将接收的电流信息传输至电参量测量计算装置的电参量计算模块。电参量计算单元根据电参量测量计算装置测试的电压信号和接收的电流信号完成其他电参量信息测量(如电压间相位、电流间相位、电压与电流间相位、频率、相序、有功功率、无功功率、视在功率、功率因数、电流矢量和等)。
在本实施例中，采用无线电流传感器采集电流信号、电参量测量计算装置采集电压信号然后计算电参量的配置方式，还可以采用无线电压传感器采集电压信号、电参量测量计算装置采集电流信号然后计算电参量的配置方式。
在一个实施例中，相位伏安表可设置有人机交互模块。人机交互模块包括输入装置和输出装置。用户通过输入装置和输出装置直接与相位伏安表进行交互。
由于仪器具有上述测量功能，用途极为广泛，主要包括：感性和容性电路的判别；继电保护各组CT之间相位的关系；变压器接线组别检查；电能表接线正确性检查；电度表运行快慢检查；二次回路检查；作为漏电流表使用等。
实施例3：电能质量分析仪
电能质量分析仪是测量电力系统电能质量状况的一种设备。
图9是根据本发明实施例的一种电能质量分析仪的结构示意图。如图9所示，电能质量分析仪包括电参量测量计算装置和无线电流传感器。无线电流传感器采集4路电流信号，分别是火线L1，L2，L3和零线的电流信号，电参量测量计算装置采集4路电压信号，分别是火线L1，L2，L3和零线的电压信号。电参量测量计算装置和无线电流传感器通过各自的无线模块或无线同步单元进行信号采样时间同步，电参量测量计算装置测量被检对象接入的模拟电压信号，并经过模拟数字转换模块转换成数字电压信号后，发送至电参量计算模块。无线电流传感器在同步的信号采样信息下测量被检对象接入的模拟电流信号，经过模拟数字转换模块转换成数字电流信号后，通过无线模块或无线传输单元传输至电参量测量计算装置的无线模块或无线传输单元，电参量测量计算装置的无线模块或无线传输单元将接收的电流信息传输至电参量测量计算装置的电参量计算模块。电参量计算模块根据电参量测量计算装置测试的电压信号和接收的电流信号计算电能质量信息。
电能质量分析仪可实时在线测量和监测电能质量。电能质量监测指标包括：电压波动和闪变、频率偏差、谐波、间谐波、电压偏差、过电压、过电流、电压暂降与短时中断、三相电压不平衡、电流不平衡、骤升骤降以及瞬态等各种电能质量参数，可广泛应用于发、供、配电系统中电能质量的实时监测和测量。
实施例4：便携式PMU同步相量测量装置
便携式PMU同步向量测量装置是一种用于进行同步向量的测量和输出以及进行动态记录的装置。
图10是根据本发明实施例的一种便携式PMU同步相量测量装置的结构示意图。如图10所示，便携式PMU同步相量测量装置包括电参量测量计算装置和无线电流传感器。无线电流传感器采集3路电流信号，电参量测量计算装置采集3路电压信号。电参量测量计算装置和无线电流传感器通过各自的无线模块或无线同步单元进行信号采样时间同步，电参量测量计算装置测量被检对象接入的模拟电压信号，并经过模拟数字转换模块转换成数字电压信号后，发送至电参量计算模块。无线电流传感器在同步的信号采样信息下测量被检对象接入的模拟电流信号，经过模拟数字转换模块转换成数字电流信号后，通过无线模块或无线传输单元传输至电参量测量计算装置的无线模块或无线传输单元，电参量测量计算装置的无线模块或无线传输单元将接收的电流信息传输至电参量测量计算装置的电参量计算模块。电参量计算模块根据电参量测量计算装置测试的电压信号和接收的电流信号计算电压相位、电流相位等相 量数据。具体的测量指标包括：三相交流电流、三相交流电压、交流频率、交流相角、谐波、间谐波、交流电压源阶跃突变、交流电流源阶跃突变、频率阶跃突变、相角阶跃突变、幅值调制、频率调制、相角调制、幅值和相角同步调制、频率斜坡、开关量输出等信息。
实施例5：用电检查仪
用电检查仪是一种用于进行电参数测量、保护回路CT接线分析和电压电流不平衡度检测的装置。
用电检查仪结构和相位伏安表的类似，如图8所示，用电检查仪包括电参量测量计算装置和无线电流传感器。根据接线方式的不同，无线电流传感器采集1至3路电流信号，电参量测量计算装置采集1至3路电压信号。电参量测量计算装置和无线电流传感器通过各自的无线模块或无线同步单元进行信号采样时间同步，电参量测量计算装置测量被检对象接入的模拟电压信号，并经过模拟数字转换模块转换成数字电压信号后，发送至电参量计算模块。无线电流传感器在同步的信号采样信息下测量被检对象接入的模拟电流信号，经过模拟数字转换模块转换成数字电流信号后，通过无线模块或无线传输单元传输至电参量测量计算装置的无线模块或无线传输单元，电参量测量计算装置的无线模块或无线传输单元将接收的电流信息传输至电参量测量计算装置的电参量计算模块。电参量计算模块根据电参量测量计算装置测试的电压信号和接收的电流信号计算电压、电流、功率、相位、不平衡度等信息。具体的测量指标包括：交流电压，交流电流，电压间、电流间、电压与电流间的相位，电网频率，有功、无功和视在功率，功率因数，谐波，分析CT接线的正确性以及电能表接线错误判别，电压电流不平衡度检测等信息。
实施例6：功率分析仪
功率分析仪是一种用于测量设备的功率曲线、功率消耗及运行效率的装置。
具体结构如图1所示。功率分析仪包括电参量测量计算装置和无线电流传感器。根据接线方式的不同，无线电流传感器采集1至4路电流信号，电参量测量计算装置采集1至4路电压信号。电参量测量计算装置和无线电流传感器通过各自的无线模块或无线同步单元进行信号采样时间同步，电参量测量计算装置测量被检对象接入的模拟电压信号，并经过模拟数字转换模块转换成数字电压信号后，发送至电参量计算模块。无线电流传感器在同步的信号采样信息下测量被检对象接入的模拟电流信号，经过模拟数字转换模块转换成数字电流信号后，通过无线模块或无线传输单元传输至电参量测量计算装置的无线模块或无线传输单元，电参量测量计算装置的无线模块或无线传输单元将接收的电流信息传输至电参量测量计算装置的电参量计算模块。电参量计算模块根据电参量测量计算装置测试的电压信号和接收的电 流信号计算电压电流数值、波形、谐波、相量、趋势等信息。具体的测量指标包括：电压电流有效值、直流成分、交流成分、整流平均值、峰值、峰峰值、波峰因数、波形系数、基波成分、基波含量、谐波失真、谐波含量、谐波因数有功功率、无功功率、视在功率、功率因数、相移、效率、阻抗、电能、电量、频率、电机转速、扭矩、机械功率、机械能、Δ功能、求和功能等信息。
根据本发明提供的无线电气传感器、电参量测量计算装置、方法及系统，由于采用无线模块传输电气信号，首先，减少测试线的使用，让电流和电压测试点的距离不受电缆长度的限制，使工作人员操作更简便，同时避免测试线缠绕打结以及测试线绝缘层被破坏导致的安全隐患；其次，电参量测量计算装置中集成了一部分电气信号的采集模块，在不增加测试线的同时减少所使用的无线模块的数量，使得整个电参量测量计算系统的布局更加简洁，降低系统的复杂度，系统模块之间的通信更加简单高效，并减少系统的成本；最后，采用电参量测量计算装置和无线电气传感器之间共享同步的信号采样时间信息，实现第一电气信号和第二电气信号的同步采样，以获得高精度的电参量信息(例如，功率和/或电能的测量准确度优于2％)。
以上对本申请实施例进行了详细介绍，本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施例的说明仅用于帮助理解本申请的方法及其核心思想。同时，本领域技术人员依据本申请的思想，基于本申请的具体实施方式及应用范围上做出的改变或变形之处，都属于本申请保护的范围。综上所述，本说明书内容不应理解为对本申请的限制。

Claims (33)

  1. 一种电参量测量计算装置，其包括第一电气信号采集模块、第一无线模块和电参量计算模块，其中：
    所述第一无线模块通过无线方式接收第一电气信号并将所述第一电气信号传输至所述电参量计算模块；
    所述第一电气信号采集模块采集第二电气信号并将所述第二电气信号传输至所述电参量计算模块；以及
    所述电参量计算模块根据所述第一电气信号以及所述第二电气信号计算电参量信息。
  2. 如权利要求1所述的装置，还包括第一模拟数字转换模块，用于将所述第一电气信号采集模块采集的模拟第二电气信号转换为数字第二电气信号。
  3. 如权利要求2所述的装置，其中，所述第一模拟数字转换模块接收所述第一无线模块的时间信号，所述第一无线模块保证所述第一电气信号和所述第二电气信号的信号采样时间同步的方式包括：
    GNSS授时；
    5G授时；
    所述第一无线模块发送本地时钟信息到对端第二无线模块；或
    所述第一无线模块接收来自对端第二无线模块的本地时钟信息。
  4. 如权利要求1所述的装置，其中，所述第一无线模块接收所述第一电气信号的无线方式包括蓝牙、2G、3G、4G、5G、WIFI、sub1G、ZigBee或自定义无线传输协议。
  5. 如权利要求2所述的装置，其中，所述第一无线模块包括第一无线同步单元，所述第一模拟数字转换模块接收所述第一无线同步单元的时间信号，所述第一无线同步单元保证所述第一电气信号和所述第二电气信号的信号采样时间同步的方式包括：
    GNSS授时；
    5G授时；
    所述第一无线同步单元发送本地时钟信息到对端无线同步单元；或
    所述第一无线同步单元接收来自对端无线同步单元的本地时钟信息。
  6. 如权利要求5所述的装置，其中，所述第一无线模块包括第一无线传输单元，所述第一无线传输单元接收所述第一电气信号的无线方式包括蓝牙、2G、3G、4G、5G、WIFI、sub1G、ZigBee或自定义无线传输协议。
  7. 如权利要求1至6任一者所述的装置，其中，所述第一电气信号是电流信号，所述第一电气信号采集模块为电压采集模块，所述第二电气信号为电压信号。
  8. 如权利要求1至6任一者所述的装置，其中，所述第一电气信号是电压信号，所述第一电气信号采集模块为电流采集模块，所述第二电气信号为电流信号。
  9. 如权利要求7所述的装置，其中，所述电压采集模块包括多个测量点，所述多个测量点能够以共用公共电压参考点的方式采集多个线路的电压。
  10. 如权利要求1至6任一者所述的装置，还包括人机交互模块，所述人机交互模块包括输入单元和输出单元。
  11. 如权利要求3或5所述的装置，其中，所述本地时钟信息包括一系列脉冲和/或时间戳，其中，所述脉冲用于控制所述第一模拟数字转换模块的采样，所述时间戳用于表达与本地时钟相关的信息，便于与对端达成正确的时钟同步。
  12. 一种电参量的测量计算方法，其包括：
    通过无线方式接收第一电气信号；
    采集第二电气信号；以及
    根据所述第一电气信号以及所述第二电气信号计算电参量信息。
  13. 如权利要求12所述的方法，还包括采用GNSS授时或5G授时执行所述第一电气信号和所述第二电气信号的信号采样时间同步，或者发送本地时钟信息或者接收对端本地时钟信息的方式执行所述第一电气信号和所述第二电气信号的信号采样时间同步。
  14. 如权利要求12所述的方法，还包括采用蓝牙、2G、3G、4G、5G、WIFI、sub1G、ZigBee或自定义无线传输协议执行所述第一电气信号的无线传输。
  15. 如权利要求12至14任一者所述的方法，其中，所述第一电气信号是电流信号，所述第二电气信号为电压信号。
  16. 如权利要求12至14任一者所述的方法，其中，所述第一电气信号是电压信号，所述第二电气信号为电流信号。
  17. 一种无线电气传感器，其包括：
    第二电气信号采集模块，用于采集第一电气信号；以及
    第二无线模块，用于接收所采集的第一电气信号并通过无线方式发送所采集的第一电气信号。
  18. 如权利要求17所述的无线电气传感器，还包括第二模拟数字转换模块，用于将所述第二电气信号采集模块采集的模拟第一电气信号转换为数字第一电气信号。
  19. 如权利要求18所述的无线电气传感器，其中，所述第二模拟数字转换模块接收所述第二无线模块的时间信号，所述第二无线模块保证所述第一电气信号的信号采样时间同步的方式包括：
    GNSS授时；
    5G授时；
    所述第二无线模块发送本地时钟信息到对端第一无线模块；或
    所述第二无线模块接收来自对端第一无线模块的本地时钟信息。
  20. 如权利要求17所述的无线电气传感器，其中，所述第二无线模块发送所采集的第一电气信号的无线方式包括蓝牙、2G、3G、4G、5G、WIFI、sub1G、ZigBee或自定义无线传输协议。
  21. 如权利要求18所述的无线电气传感器，其中，所述第二无线模块包括第二无线同步单元，所述第二模拟数字转换模块接收所述第二无线同步单元的时间信号，所述第二无线同步单元保证所述第一电气信号的信号采样时间同步的方式包括：
    GNSS授时；
    5G授时；
    所述第二无线同步单元发送本地时钟信息到对端无线同步单元；或
    所述第二无线同步单元接收来自对端无线同步单元的本地时钟信息。
  22. 如权利要求21所述的无线电气传感器，其中，所述第二无线模块包括第二无线传输单元，所述第二无线传输单元发送所采集的第一电气信号的无线方式包括蓝牙、2G、3G、4G、5G、WIFI、sub1G、ZigBee或自定义无线传输协议。
  23. 如权利要求19或21所述的无线电气传感器，其中，所述本地时钟信息包括一系列脉冲和/或时间戳，其中，所述脉冲用于控制所述第二模拟数字转换模块的采样，所述时间戳用于表达与本地时钟相关的信息，便于与对端达成正确的时钟同步。
  24. 一种电参量测量计算系统，包括如权利要求1-11任一者所述的电参量测量计算装置和如权利要求17至23任一者所述的无线电气传感器。
  25. 如权利要求24所述的测量计算系统，其中，所述第一无线模块和所述第二无线模块保证所述第一电气信号和所述第二电气信号的信号采样时间同步的方式包括：
    GNSS授时；
    5G授时；
    所述第一无线模块发送本地时钟信息到所述第二无线模块；或
    所述第一无线模块接收来自所述第二无线模块的本地时钟信息。
  26. 如权利要求24所述的测量计算系统，其中，所述第二无线模块接收所采集的第一电气信号并将所采集的第一电气信号通过无线方式传输至所述第一无线模块，所述无线方式包括蓝牙、2G、3G、4G、5G、WIFI、sub1G、ZigBee或自定义无线传输协议。
  27. 如权利要求24所述的测量计算系统，其中，所述第一无线模块包括第一无线同步单元，所述第二无线模块包括第二无线同步单元，所述电参量测量计算装置和所述无线电气传感器通过所述第一无线同步单元和所述第二无线同步单元保证所述第一电气信号和所述第二电气信号的信号采样时间同步。
  28. 如权利要求27所述的测量计算系统，其中，所述第一无线同步单元和所述第二无线同步单元保证所述第一电气信号和所述第二电气信号的信号采样时间同步的方式包括:
    GNSS授时；
    5G授时；
    所述第一无线同步单元发送本地时钟信息到所述第二无线同步单元；或
    所述第一无线同步单元接收来自所述第二无线同步单元的本地时钟信息。
  29. 如权利要求28所述的测量计算系统，其中，所述第一无线模块包括第一无线传输单元，所述第二无线模块包括第二无线传输单元，所述第二无线传输单元接收所采集的第一电气信号并将所采集的第一电气信号通过无线方式传输至所述第一无线传输单元。
  30. 如权利要求29所述的测量计算系统，其中，所述无线方式包括蓝牙、2G、3G、4G、5G、WIFI、sub1G、ZigBee或自定义无线传输协议。
  31. 如权利要求24至30任一者所述的测量计算系统，其中，所述第一电气信号是电流信号，所述第二电气信号为电压信号。
  32. 如权利要求24至30任一者所述的测量计算系统，其中，所述第一电气信号是电压信号，所述第二电气信号为电流信号。
  33. 如权利要求25或28所述的测量计算系统，其中，所述本地时钟信息包括一系列脉冲和/或时间戳，其中，所述脉冲用于控制所述第一模拟数字转换模块和所述第二模拟数字转换模块的采样，所述时间戳用于表达与本地时钟相关的信息，便于与对端达成正确的时钟同步。
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CN116184100A (zh) * 2023-04-27 2023-05-30 广东电网有限责任公司 一种电网电能质量的校准方法及装置
CN116184100B (zh) * 2023-04-27 2023-07-21 广东电网有限责任公司 一种电网电能质量的校准方法及装置

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