CN201069469Y

CN201069469Y - Real time online monitoring device for calculation error of the high-voltage current mutual inductor

Info

Publication number: CN201069469Y
Application number: CNU2007201281563U
Authority: CN
Inventors: 曹锐
Original assignee: Youteaoke Electronics TECH Co Ltd Taiyuan City
Current assignee: Youteaoke Electronics TECH Co Ltd Taiyuan City
Priority date: 2007-07-20
Filing date: 2007-07-20
Publication date: 2008-06-04
Anticipated expiration: 2017-07-20

Abstract

The utility model discloses a real-time on-line monitoring device for metering errors of a high-voltage potential transformer, which belongs to the technical field of high-voltage and heavy current detection and metering. The monitoring device is characterized in that the device can work under the conditions of high voltage (above 10 KV) and heavy current, and realizes the real-time, on-line and continuous monitoring under the conditions of high voltage and heavy current. The monitoring device comprises mechanisms and structures for measuring the current amplitude and phase information at the primary and secondary sides of a high voltage potential transformer, and a detection accessory and/or extension for sending the measured current amplitude and phase information by means of wire transmission and/or wireless transmission. The device can collect the current amplitude and phase information by the detection accessory by means of real-time zero-error wire transmission and/or wireless transmission. The device has the advantages of reasonable design, easy and rapid use, and real-time, on-line and continuous monitoring of metering errors of the high-voltage potential transformer; and can be widely used in the field of electricity detection.

Description

Real-time on-line monitoring device for metering error of high-voltage current transformer

A technical field

The utility model discloses a real-time on-line monitoring device of high-voltage current transformer metering error belongs to high pressure (if more than 10 KV), forceful electric power detection and measurement technical field, concretely relates to is a real-time online long-term monitoring device of real online, true accurate monitoring high-voltage current transformer metering error.

Second, background Art

In the production of electric power systems, electric energy is the final product, and the metering of the electric energy is extremely important. The electric energy metering device is the only tool for metering electric energy, and is a main means for supply and utilization trade settlement of three parties of sending, supplying and utilizing electricity. The accuracy of the electric energy metering device is directly related to the economic benefits of three parties, namely, the power generation party, the power supply party and the power utilization party. Therefore, the national related metering regulations stipulate that the accuracy of the electric energy metering device must be regularly checked on site. The electric energy metering device is generally composed of a voltage transformer (PT), a Current Transformer (CT) and an electric energy meter. Therefore, the error of the electric energy metering device is composed of PT error, CT error, error caused by PT secondary voltage drop, and error of the electric energy meter. The PT error and the CT error are called as the error of a primary loop of the electric energy metering, and the error caused by the PT secondary voltage drop and the error of the electric energy meter are called as the error of a secondary loop of the electric energy metering.

For economic and safety reasons, a precise current transformer needing special insulation reinforcement is not allowed to be temporarily connected into a high-voltage and high-voltage power line in live operation to be compared with a CT in field operation, so that the CT error can be detected only by adopting a method of field power failure at present. Namely, when the system is in power failure, the CT power failure detection equipment is carried to measure the CT error on site. The CT power failure detection equipment consists of a very heavy current booster, a standard device and the like, power failure time needs to be coordinated with all relevant aspects, and in addition, measurement errors in the real operation state of the CT cannot be accurately obtained in the power failure measurement process, so the on-site power failure detection method is time-consuming, labor-consuming and inaccurate. Therefore, it is urgent and hoped to research a testing method capable of measuring the metering error of the high-voltage current transformer on line in real time. The method successfully researched by the inventor provides and designs a brand-new high-voltage current transformer metering error testing device, which can complete the online real-time measurement of the metering error of the high-voltage current transformer which cannot be completed in the past, is reliable and practical, can accurately measure the metering error of the high-voltage current transformer, solves the problem that the metering error of the high-voltage current transformer cannot be monitored for a long time in the electric energy detection field, also ends the history that no high-voltage current transformer metering error testing device exists in the electric energy detection field, and is an innovative thought and creative invention. The utility model discloses a "real-time on-line monitoring device of high-voltage current transformer metering error"'s technical characterstic lies in: the new detection device is implemented under high voltage (for example, above 10 KV) and strong current, and detection or measurement under high voltage and strong current will undoubtedly present a complete and more serious challenge to the detection or measurement technology, and the electric energy detection technology is required to be fully improved to the level of high voltage, strong current specification and safety. The utility model discloses a this kind of new "real-time on-line monitoring device of high-voltage current transformer metering error" can be online real-time, direct accurate, monitor high-voltage current transformer metering error for a long time, can protect supply and use both sides's economic interests better, also made the contribution for the scientific and technological progress of electric power cause.

Third, the invention

The utility model discloses the purpose of the invention is: the technical content of the real-time online monitoring device for the metering error of the high-voltage current transformer is provided for the society, a brand-new accurate means for monitoring the metering error of the high-voltage current transformer and a convenient and quick detection device are provided for both power supply and power utilization parties, and the device also performs some work for the scientific and technological progress of the power industry.

The technical scheme of the utility model content as follows: regarding the real-time on-line monitoring device of the metering error of the high-voltage current transformer, the main body of the device comprises a mechanism and a structure for metering or detecting the amplitude and phase value information of the primary side and the secondary side of the high-voltage current transformer, if the device comprises: instrument housing, panel and the electronic circuit of measurement or detection current amplitude and phase value in it etc.. The mechanisms and structures for measuring or detecting the information about the magnitude and phase values of the current should be solved and designed by the existing and well-known and commonly used technologies, and will not be described in detail. The device is characterized in that: one is monitoring under high voltage (such as over 10 KV) and strong current, and the other is real-time on-line monitoring under high voltage and strong current for a long time. The device is required to comprise or be provided with at least one or more (such as two or three, etc.) detection accessories capable of detecting the information of the current amplitude value and the current phase value in real time without error or with negligible error, wherein the detection accessories are a detection end or/and a branch machine: a. the device and/or the detection terminal and the cable thereof are/is provided with at least one piece of information for measuring or detecting the amplitude value and the phase value of the current. The measurement is error-free or error-small to negligible, which requires the detection end and its cable to have a fixed structure and a fixed known detection error value and subtract it to be error-free or error-small to negligible. The device or/and means for transmitting the information of the measured or detected current amplitude and phase values wirelessly, the means being constituted by electronic means, the means being connected to the main body of the device by means of a wired cable for transmission or wirelessly transmitted/received, the means being separate parts arranged outside the main body of the device, constituting an extension of the device, the extension being constituted by a housing and the electronic means therein. The electronic mechanism is composed of various electronic components, devices, modules, parts, integrated circuit blocks, electronic circuits, software programs, and the like.

According to the real-time on-line monitoring device of the metering error of the high-voltage current transformer, the technical characteristics are as follows: the real-time on-line monitoring device for the metering error of the high-voltage current transformer has the specific structure that: a. the structure of the device or/and at least one detection end for detecting the current amplitude value and phase value information of the belt is as follows: the device comprises a cable connected with a detection input end of the device and a current amplitude value and phase value information sampling detection end at the end part of the cable, wherein the sampling detection end is a direct connection end between a primary side line and a secondary side line of a three-phase high-voltage current transformer. b. The device or/and at least one split or extension mechanism with wired transmission of detected current amplitude and phase value information, wherein the detailed structure of the mechanism for wired transmission of detected current amplitude and phase value information between an extension and the device is as follows: the sampling circuit of the current amplitude and phase value, the analog/digital conversion circuit controlled by the controller, the transmission circuit, the transmission cable, the interface circuit, the connector and the input circuit are functionally connected, the sampling component of the sampling circuit can be arranged at the information sampling part of the current amplitude and phase value of the primary side and the secondary side of the high-voltage current transformer to be tested, and the sampling component is a connecting end directly connected with the primary side and the secondary side of the three-phase high-voltage current transformer. The movable connector is the connecting end of the I/O mechanism of the wired transmission extension, before the movable connector of the interface circuit, the wired transmission extension of the device is formed, and the fixed connector forms the input circuit of the current amplitude value and phase value information of the device. c. The device or/and at least one split or extension mechanism for wirelessly transmitting the detected current amplitude and phase value information, wherein the detailed structure of the mechanism for wirelessly transmitting/receiving the detected current amplitude and phase value information between the extension and the device is as follows: the sampling circuit of the current amplitude and phase value, the A/D conversion circuit controlled by the controller, the transmitting circuit and the transmitting antenna thereof are functionally connected to form an extension set for wirelessly transmitting the detected current amplitude and phase value information, the sampling component of the sampling circuit can be arranged at the sampling part of the current amplitude and phase value information of the primary side and the secondary side of the high-voltage current transformer to be detected, and the sampling component is a connecting end directly connected with the primary side and the secondary side of the three-phase high-voltage current transformer. The device also needs to be correspondingly provided with a mechanism for wirelessly receiving the detected current amplitude and phase value information, the mechanism for wirelessly receiving the detected current amplitude and phase value information is arranged on the main body part of the device and is formed by functionally connecting a receiving circuit of the current amplitude and phase value information, a receiving antenna thereof, an amplifying circuit and an input circuit, and the input circuit is the input circuit of the current amplitude and phase value information of the device. The device is not excluded from the structure that the device is provided with a detection end for detecting the information of the current amplitude and the phase value, an extension set for transmitting the information of the detected current amplitude and the phase value by wire, and an extension set for wirelessly transmitting the information of the detected current amplitude and the phase value, wherein the extension sets are a plurality of (such as one of three).

According to the real-time on-line monitoring device of high-voltage current transformer metering error, technical characteristics still have: the real-time on-line monitoring device for the metering error of the high-voltage current transformer has the detailed structure that: 1) the detailed structure of the device or/and the detection end for detecting the information of the current amplitude value and the phase value is as follows: the detection cable of the detection end and the sampling detection end are provided with fixed structures. If the length of the cable is fixed, the detection end is fixed, the electrical structure parameters are fixed, and the detection error caused by the detection end when detecting the current amplitude value and phase value information is fixed and known, the detection error can be deducted in the detection, and the detection becomes error-free or the error is negligibly small in the measurement. 2) The device or/and at least one extension with wired transmission of detected current amplitude and phase value information, wherein the detailed structure of the mechanism for wired transmission of the detected current amplitude and phase value information between the extension and the device is as follows: a. the structure of the mechanism for wire transmission of detected current amplitude and phase value information is formed by connecting a sampling circuit, an analog-to-digital conversion circuit controlled by a controller, an electro-optical conversion interface circuit, a transmission optical fiber, a photoelectric conversion interface circuit, an amplifying circuit and an input circuit one by one. The configuration described at point a above has a digitizing mechanism and then wired to collect the sensed current magnitude and phase value information onto the device with no or negligible error. Or b, the structure of the current amplitude and phase value information mechanism for wired transmission detection is formed by connecting a digital sampling circuit, a digital amplification circuit (a), an electro-optical conversion interface circuit, a transmission optical fiber, a photoelectric conversion interface circuit, a digital amplification circuit (b) and a digital input circuit one by one. The digital transmission architecture described in point b above collects the detected current magnitude and phase value information directly, without error or with error as small as negligible, onto the device using wired transmission. The circuits described in a and b above can be designed and fabricated using well-known and commonly used technology and well-known and commercially available electronic circuit components, as long as they can perform or fulfill the functions of the circuits. 3) The detailed structure of the mechanism for wirelessly transmitting/receiving the detected current amplitude and phase value information between the extension and the device is as follows: a. the extension set for wirelessly transmitting the detected current amplitude and phase value information is structurally composed of a sampling circuit, an analog-to-digital conversion circuit controlled by a controller, a digital processing module, a wireless data transmission communication module and a transmitting antenna thereof in functional connection. The corresponding device is provided with a mechanism and a structure for wirelessly receiving detected current amplitude value and phase value information, and the mechanism and the structure are formed by functionally connecting a wireless data transmission communication module, a receiving antenna thereof, a digital processing module and an input circuit. Or b, the structure of the extension for wirelessly transmitting the detected current amplitude and phase value information is formed by connecting a sampling circuit, an analog-to-digital conversion circuit controlled by a controller, a digital modulation circuit, a frequency conversion transmitting circuit and a transmitting antenna function thereof; the corresponding device is provided with a mechanism and a structure for wirelessly receiving and detecting the information of the current amplitude value and the phase value, and the mechanism and the structure are formed by functionally connecting a receiving and frequency conversion circuit, a receiving antenna thereof, a digital demodulation circuit and an input circuit. The configurations described in points a and b above all have a digitizing mechanism and then wirelessly transmit the sensed current magnitude and phase information to the device with no or negligible error. Or c, the extension set for wirelessly transmitting the detected current amplitude and phase value information is structurally composed of a digital sampling circuit, a digital amplifying circuit and a transmitting antenna thereof in functional connection. The corresponding device is provided with a mechanism and a structure for wirelessly receiving the detected current amplitude value and phase value information, and the mechanism and the structure are formed by functionally connecting a digital receiving amplifying circuit, a receiving antenna thereof and a digital input circuit. The digitization structure described in point c directly integrates the detected current amplitude and phase information into the device in a wireless transmission/reception manner with no error or with an error as small as negligible. The circuits described in a, b and c above can be designed and manufactured by using the existing known and commonly used technical contents and the known and commonly used electronic circuit parts, as long as the circuits can complete or realize the functions of the circuits.

The utility model discloses a real-time on-line monitoring device of high-voltage current transformer metering error advantage is many: the device for monitoring the metering error of the high-voltage current transformer on line in real time has the advantages that: 1. the device is used for monitoring under the conditions of high voltage (such as more than 10 KV) and strong electricity, the detection range is expanded to the technical field of high voltage measurement or detection, the electric energy measurement or detection of the high voltage and the strong electricity undoubtedly provides comprehensive and more serious challenges for the electric energy measurement or detection technology, and the electric energy measurement or detection technology is required to be comprehensively improved to the level of the requirements of high voltage, strong electricity specification, safety and the like; 2. the device is used for monitoring under the conditions of high voltage and strong electricity in real time and on line for a long time, and monitoring under the conditions of high voltage and strong electricity in real time and on line for a long time, so that the device is the highest requirement and level of a high-voltage metering or detecting technology and the most difficult requirement and level of the high-voltage metering or detecting technology; 3. the real-time on-line long-term monitoring device implemented under the conditions of high voltage (such as over 10 KV) and strong electricity is an independent innovation and technical leap of high voltage measurement or detection technology under the conditions of high voltage (such as over 10 KV) and strong electricity, and makes a contribution to the improvement of the high voltage measurement or detection level in China. 4. The real-time online monitoring device for the metering error of the high-voltage current transformer also provides a brand-new accurate means for detecting the metering error of the high-voltage current transformer for both power supply and power utilization, and a testing device which is convenient, quick and long-term to use, and also makes a contribution to the scientific and technological progress of the power industry. Is worthy of being popularized and used in the field of electric power systems and electric power industry detection.

Description of the drawings

The attached drawings of the specification of the utility model are 7 in total:

FIG. 1 is a schematic structural diagram of a real-time online monitoring device for metering errors of a high-voltage current transformer;

FIG. 2 is a schematic diagram of a high-voltage current transformer metering error real-time online monitoring device adopting a wired transmission mechanism with an error-free detection end and a structure;

FIG. 3 is a schematic diagram of a high-voltage current transformer metering error real-time on-line monitoring device adopting an error-free wired transmission extension and a structure;

FIG. 4 is a schematic diagram of an extension and structure of the device for real-time online monitoring of the metering error of the high-voltage current transformer in FIG. 3, which is free of errors and transmits current amplitude and phase metering information by wire;

FIG. 5 is a schematic diagram of a high-voltage current transformer metering error real-time on-line monitoring device with an error-free extension for wirelessly transmitting/receiving current amplitude and phase value information and a structure;

FIG. 6 is a schematic diagram of an extension and structure of the device for real-time online monitoring of the metering error of the high-voltage current transformer in FIG. 5, which wirelessly transmits/receives current amplitude and phase metering information without error;

FIG. 7 is a schematic diagram of another error-free extension and structure for wirelessly transmitting/receiving current amplitude and phase metering information of the high-voltage current transformer metering error real-time online monitoring device of FIG. 5;

the use of the same reference symbols in different drawings indicates identical items being referred to by the same reference symbols in the various drawings. In each figure: 1. a high-voltage current transformer; 2. a three-phase high voltage power line; 3. a three-phase secondary current line; 4. the detection accessory (detection end 4') or/and the extension set transmit current information in a wired transmission mode and a wireless mode; 5. a monitoring device; 6. indicating wireless transmitting and receiving metering information; 7. indicating the metering information of wired transmission; 8. indicating the sampling current information; 9. an analog/digital conversion circuit; 10. a controller, such as a microprocessor or a single chip microcomputer; 11. an electro-optical conversion interface circuit; 12. a transmission optical fiber; 13. a photoelectric conversion interface circuit; 14. an amplification input circuit; 15. the dotted line indicates the boundary between the primary side and the secondary side of the high-voltage current transformer; 16. a digital processing module (a); 17. an interface circuit (a); 18. a wireless data transmission communication module (a); 19. a wireless data transmission communication module (b); 20. an interface circuit (b); 21. a digital processing module (b); 22. a digital modulation circuit; 23. a frequency conversion circuit; 24. an amplifying transmission circuit; 25. a receiving and frequency conversion circuit; 26. a digital demodulation circuit.

Detailed description of the preferred embodiments

The non-limiting embodiment of the present invention is as follows:

first embodiment real-time online monitoring device for metering error of high-voltage current transformer

The device for monitoring the metering error of the high-voltage current transformer on line in real time is a device for monitoring the metering error of the high-voltage current transformer on line in real time, truly and accurately and for a long time, and the specific structure of the device is jointly shown by figures 2-6. The main body part (5 in each figure) of the device of the example comprises a mechanism and a structure for measuring or detecting the amplitude value and the phase value information of the primary side and the secondary side of the high-voltage current transformer, and comprises the following components: the instrument comprises an instrument shell, a panel and an electronic circuit and the like, wherein the electronic circuit is used for metering or detecting the current amplitude value and the phase value of the high-voltage current transformer. The mechanisms and structures for measuring or detecting the information about the magnitude and phase values of the current should be solved and designed by the existing and well-known and commonly used technologies, and will not be described in detail. The device of the embodiment is characterized in that: one is monitoring under high voltage (such as over 10 KV) and strong current, and the other is real-time on-line monitoring under high voltage and strong current for a long time. The device is provided with or comprises at least one or more than one (such as two or three) detection accessories 4 capable of detecting the current amplitude value and phase value information in real time without error or with negligible error, wherein the detection accessories are detection terminals 4' or/and extension sets 4: a. the device is provided with at least one detection terminal 4' for detecting the information of the current amplitude value and the phase value and a cable thereof. The measurement is error-free or error-small to be negligible, which requires the detection terminal 4' and its cable to have a fixed structure and a fixed known detection error value and to subtract it, so that the measurement is error-free or error-small to be negligible. b. The device 5 in this example is provided with at least one means 4 for wired transmission of information about the detected current amplitude and phase values in real time, without or with negligible error. c. The device 5 of this example is provided with at least one means 4 for wirelessly transmitting information on the detected current amplitude and phase values in real time, without or with negligible error. The mechanisms in b and c above are all composed of electronic mechanisms, which are connected with the main body of the device 5 through transmission wired cables or through wireless transmission/reception, and are separate parts arranged outside the main body of the device 5 to form the extension 4 of the device, which is composed of a housing and the electronic mechanisms therein. The electronic mechanism is composed of various electronic components, devices, modules, parts, integrated circuit blocks, electronic circuits, software programs, and the like. The real-time wired transmission or wireless transmission without errors or with negligible errors refers to: the wire transmission or wireless transmission extension 4 of the device 5 collects the sampled or detected current amplitude and phase value information into the device 5 after digital processing without error or with error negligibly small. It is also noted that: the device 5 of this example has a configuration in which a detection terminal 4 for detecting current amplitude and phase value information, a slave unit 4 for wired transmission of detected current amplitude and phase value information, and one (three in total) slave unit 4 for wireless transmission of detected current amplitude and phase value information are provided. As shown in fig. 2: the structure of the detection terminal 4' for detecting at least one piece of current amplitude and phase value information of the device 5 of this example is: the cable (such as an optical cable) connected with the detection input end of the device 5 and the sampling detection end of the end part of the cable are connected with the primary side three-phase cable 2 and the secondary side three-phase cable 3 of the high-voltage current transformer 1 directly for sampling, so that the sampling precision is high. Or the current sampling can also be carried out by adopting a pincer-shaped current transformer and the like. The detailed structure of the detection terminal 4' for detecting at least one of the current amplitude and phase value information of the device 5 of this example is: the detection cable and the sampling detection end of the detection end 4 'have fixed structures, such as fixed cable length, fixed detection end head, electric parameter structure and the like, so that the detection error caused by the detection end 4' when detecting the current amplitude value and phase value information is fixed and known, can be deducted in the detection, and becomes error-free or error-negligibly small in the measurement. As shown in fig. 3 and 4: the device 5 of this example has at least one split or slave unit means 4 for wired transmission of detected current amplitude and phase value information, and the structure of the current amplitude and phase value information means for wired transmission between the slave unit 4 and the device 5 of this example is: the sampling circuit of the current amplitude and phase value information-the A/D conversion circuit 9 controlled by the controller 10-the transmission circuit and the transmission cable-the interface circuit and the connector-the input circuit are functionally connected. The sampling component of the sampling circuit can be arranged at the sampling position of a primary side three-phase cable 2 and a secondary side three-phase cable 3 of a tested high-voltage current transformer 1, the sampling component is a connecting end directly connected with the primary side three-phase cable 2 and the secondary side three-phase cable 3 of the high-voltage

current transformer

1, and 8 in the figure shows sampling current information. Before the movable connector of the interface circuit, the wired transmission extension set 4 of the device 5 is formed, the movable connector is the input/output mechanism connecting end of the wired transmission extension set 4, and the fixed connector forms the current amplitude value and phase value information input circuit of the device 5. The detailed structure of the subset 4 of the device 5 of this example, which carries at least one piece of information of the current amplitude and phase values detected by wired transmission, is: the structure of the mechanism for wired transmission of detected current amplitude and phase value information in this example is composed of a sampling circuit, an analog/digital conversion circuit 9 controlled by a controller 10, an electro-optical conversion interface circuit 11, a transmission optical fiber 12, a photoelectric conversion interface circuit 13, and an amplification input circuit 14. The dashed line 15 indicates the boundary between the primary and secondary sides of the high voltage current transformer. The current magnitude and phase information means of the wired transmission of this example have analog/digital conversion circuits 9 controlled by a digital processing means controller 10, and then the wired transmission is used to assemble the current magnitude and phase information of the example device 5 with no or negligible error. The circuits of the mechanism for wired transmission of sensed current magnitude and phase value information can be designed and fabricated using conventional, well-known and commonly used, commercially available electronic circuit components, so long as they perform or fulfill the functions of the respective circuits. As shown in fig. 5 and 6: the split or slave unit means 4 for wirelessly transmitting the detected current amplitude and phase value information of the device 5 of this example has a configuration in which the current amplitude and phase value information means for wirelessly transmitting/receiving the detected current amplitude and phase value information between the slave unit 4 and the device 5 of this example is: the sampling circuit of the current amplitude and phase value information, the analog/digital conversion circuit 9 controlled by the controller 10, the transmitting circuit and the transmitting antenna thereof are functionally connected to form an extension set for wirelessly transmitting the detected current amplitude and phase value information. The sampling component of the sampling circuit can be arranged at the sampling positions of a primary side three-phase cable 2 and a secondary side three-phase cable 3 of a tested high-voltage current transformer 1, and the sampling component is a connecting end directly connected with the primary side three-phase cable 2 and the secondary side three-phase cable 3 of the high-voltage current transformer 1. The device 5 is also required to be correspondingly provided with a mechanism for wirelessly receiving the detected current amplitude and phase value information, the mechanism for wirelessly receiving the detected current amplitude and phase value information is arranged on the main body part of the device 5 and is formed by functionally connecting a receiving circuit of the current amplitude and phase value information, a receiving antenna thereof, an amplifying circuit and an input circuit, and the input circuit is the input circuit of the current amplitude and phase value information of the device. The detailed structure of at least one slave set 4 with which the device 5 of this example wirelessly transmits information on the detected current amplitude and phase values is: the extension set for wirelessly transmitting detected current amplitude and phase value information in the embodiment is formed by connecting a sampling circuit, an analog/digital conversion circuit 9 controlled by a controller 10, a digital processing module (a)16, an interface circuit (a)17, a wireless data transmission communication module (a)18 and a transmitting antenna thereof; the corresponding structure of the device 5 with the mechanism for wirelessly receiving the detected current amplitude and phase information is as follows: the wireless data transmission communication system is formed by functionally connecting a wireless data transmission communication module (b)19, a receiving antenna thereof, an interface circuit (b)20, a digital processing module (b)21 and an input circuit. The means for wirelessly transmitting the detected current magnitude and phase value information in this example is configured with an analog/digital conversion circuit 9 controlled by a digitizer controller 10, and then wirelessly transmitting the detected current magnitude and phase value information to the device 5 with no or negligible error. The circuits of the mechanism for wirelessly transmitting information about the magnitude and phase of the detected current can be designed and fabricated using conventional, well-known and commonly used electronic circuit components, as long as they are capable of performing or performing the functions of the circuits. The detection accessories of the device 5 are: the detection terminal 4', the extension set 4 for wired transmission of the detected current amplitude and phase value information, and the extension set 4 for wireless transmission of the detected current amplitude and phase value information. In FIG. 1 is illustrated: 7 indicates wired transmission of the metered or sensed information, and 6 indicates wireless transmission and reception of the metered or sensed information.

The operation process of the real-time online monitoring of the metering error of the high-voltage current transformer of the device 5 in the example is as follows: the current amplitude and phase information of the primary side and the secondary side of the high-voltage current transformer to be measured are simultaneously measured or detected on line in real time by a special measuring or detecting instrument (namely, the monitoring device 5 in the embodiment) and a detecting accessory 4 thereof, the respectively measured or detected current amplitude and phase information are collected to two or any one special measuring or detecting instrument (such as the monitoring device 5 in the embodiment) in a sampling and wired transmission or wireless transmission/receiving mode, and the difference of the values is the measuring error value of the high-voltage current transformer comprising the specific difference and the angular difference information. The working process is finished.

Second embodiment, real-time online monitoring device for metering error of high-voltage current transformer

The device for monitoring the metering error of the high-voltage current transformer on line in real time is a device for monitoring the metering error of the high-voltage current transformer on line in real time, truly and accurately and for a long time, and the specific structure of the device is shown in figure 2. The main body part (5 in fig. 2) of the device comprises a measuring or detecting mechanism and a structure for the amplitude and phase value information of the primary side and the secondary side of the high-voltage current transformer, and any mechanism and structure for measuring or detecting the amplitude and phase value information of the current can be solved and designed by the existing known and public technical content, and need not be described in more detail. The apparatus 5 of this example is characterized in that: one is monitoring under high voltage (such as over 10 KV) and strong current; secondly, real-time online monitoring is carried out under the conditions of high voltage and strong electricity for a long time; thirdly, in the embodiment, special metering or detecting

instruments

5 and 4 are adopted to monitor the current amplitude and phase values of the primary side high voltage and the secondary side mutual inductance of the high-voltage current transformer 1. The device 5 of this example may be provided with one or two detection terminals 4' and its cable for detecting current amplitude and phase value information in real time, without error or with negligible error, one of which may be a spare part. The structure of the detection terminal 4' for detecting the voltage measurement information in this example is: the cable connected with the detection input end of the device 5 and the sampling detection end of the end part of the cable are arranged, the sampling detection end is a connection end which is directly connected with the primary side three-phase cable 2 and the secondary side three-phase cable 3 of the high-voltage current transformer 1 for sampling, and the connection terminals are all known technologies, so that the sampling precision is high. The detailed structure of the detection end 4' in this example is: the detection cable of the detection end 4 'and the sampling detection end have fixed structures, such as fixed cable length, fixed detection end head, fixed electrical structure parameters and the like, so that the detection error caused by the detection end 4' when detecting the current amplitude value and phase value information is fixed and known, can be deducted in the detection, and becomes error-free or error-negligibly small in the measurement. The rest of the components which are not described are all the same as those described in the first embodiment and are not repeated.

Third embodiment, high-voltage current transformer metering error real-time on-line monitoring device

The device for monitoring the metering error of the high-voltage current transformer on line in real time is a device for monitoring the metering error of the high-voltage current transformer on line in real time, truly and accurately and for a long time, and the specific structure of the device is shown in figure 3. The main body part (5 in fig. 3) of the device comprises a measuring or detecting mechanism and a structure for measuring or detecting the current amplitude value and the phase value information of the primary side and the secondary side of the high-voltage current transformer, and the measuring or detecting mechanism and the structure for measuring or detecting the current amplitude value and the phase value information can be solved and designed by the prior known and public technology, and need not be described in more detail. The device 5 of this example is characterized in that: the device 5 of this example can be provided with one or two wired transmission extensions 4 for detecting the current amplitude and phase value information in real time without error or with negligible error, and the structure of the wired transmission extension 4 for detecting the current amplitude and phase value information of this example is composed of a sampling circuit, an analog/digital conversion circuit 9 controlled by a controller 10, an electro-optical conversion interface circuit 11, a transmission optical fiber 12, an electro-optical conversion interface circuit 13, and an amplifying and input circuit 14, which are connected one by one. The wired transmission extension 4 of this example has an analog/digital conversion circuit 9 controlled by a digital processing means controller 10, which collects the detected current amplitude and phase information onto the device 5 of this example by wired transmission with no or negligible error. The circuits of the wired extension 4 of this example can be designed and manufactured by using the existing well-known and commonly used technical contents and well-known and commercially available electronic circuit components, as long as they can be used or adopted to complete or realize the functions of the circuits. The rest of the parts which are not described are all the same as those in the first embodiment and the second embodiment, and are not repeated.

Fourth embodiment real-time on-line monitoring device for metering error of high-voltage current transformer

The device for monitoring the metering error of the high-voltage current transformer on line in real time is a device for monitoring the metering error of the high-voltage current transformer on line in real time, truly and accurately and for a long time, and the specific structure of the device is shown in figure 5. The main body part (5 in fig. 5) of the device comprises a metering or detecting mechanism and a structure of current amplitude and phase value information, the device 5 of the embodiment can be provided with one or two wireless transmitting extensions 4 for detecting the current amplitude and phase value information in real time without error or with negligible error, and the structure of the wireless transmitting extension 4 for detecting the current amplitude and phase value information of the embodiment is formed by connecting a sampling circuit, an analog/digital conversion circuit 9 controlled by a controller 10, a digital modulation circuit 22, a frequency conversion circuit 23, an amplifying and transmitting circuit 24 and a transmitting antenna function thereof; the corresponding device 5 of this embodiment has a mechanism and structure for wirelessly receiving the detected current amplitude and phase information, which is composed of a receiving and frequency converting circuit 25 and its receiving antenna, a digital demodulating circuit 26, and an input circuit. The wireless transmitter slave set 4 of this example has an analog/digital conversion circuit 9 controlled by a digital processing means controller 10, and can collect the detected current amplitude and phase value information on the device 5 of this example in a wireless transmission manner with no error or with an error as small as negligibly small. The circuits of the slave radio transmitter 4 of this example can be designed and manufactured using conventionally known and commonly used technical contents and known and commercially available electronic circuit components, as long as they can be used or employed for performing or realizing the functions of the circuits. The rest of the parts which are not described are all the same as those in the first embodiment to the third embodiment, and are not repeated.

Fifth embodiment, device for monitoring metering error of high-voltage current transformer in real time on line

The device for monitoring the metering error of the high-voltage current transformer on line in real time is a device for monitoring the metering error of the high-voltage current transformer on line in real time, truly and accurately and for a long time, and the specific structure of the device is jointly shown in fig. 2 and fig. 3. The main body part (5 in the two figures) of the device comprises a mechanism and a structure for measuring or detecting the current amplitude value and the current phase value, and the device 5 is characterized in that: the device 5 of this example can be provided with two detection accessories 4, one is a detection terminal 4 'and its cable for detecting the current amplitude and phase information in real time without error or with negligible error, and the detection cable of the detection terminal 4' and the sampling detection terminal have fixed structures. One is a slave set 4 that wired transmits the detected current magnitude and phase value information in real time, without or with negligible error. The structure of the extension set 4 for wired transmission of detected current amplitude and phase value information is formed by connecting a digital sampling circuit, a digital amplifying circuit (a), an electro-optical conversion interface circuit, a transmission optical fiber, an electro-optical conversion interface circuit, a digital amplifying circuit (b) and a digital input circuit one by one, and the digital transmission circuit of the extension set 4 for wired transmission of detected current amplitude and phase value information can directly collect the detected current amplitude and phase value information to the device 5 without error or with error as little as negligibly. The rest of the parts which are not described are all the same as those in the first embodiment to the fourth embodiment, and are not repeated.

Sixth embodiment real-time online monitoring device for metering error of high-voltage current transformer

The device for monitoring the metering error of the high-voltage current transformer on line in real time is a device for monitoring the metering error of the high-voltage current transformer on line in real time, truly and accurately and for a long time, and the specific structure of the device is jointly shown in fig. 2 and fig. 5. The main body part (5 in the two figures) of the device comprises a mechanism and a structure for measuring or detecting the information of the current amplitude value and the phase value, and the device 5 of the embodiment is characterized in that: the device 5 of this example may be provided with two detection accessories 4: one is a detection terminal 4 'and its cable for detecting the current amplitude and phase information in real time without error or with negligible error, and the detection cable of the detection terminal 4' and the sampling detection terminal have fixed structures. One is a slave set 4 that wirelessly transmits the detected current magnitude and phase value information in real time, without error or with negligible error. The wireless transmission detection current amplitude and phase value information extension 4 is structurally composed of a digital sampling circuit, a digital amplifying circuit and a transmitting antenna thereof in functional connection. The corresponding device 5 also has a mechanism and structure for wirelessly receiving information of the detected current amplitude value and phase value: the digital receiving amplifying circuit, the receiving antenna and the digital input circuit are functionally connected. They are not shown in detail. The digital circuit structure of the wireless transmission detection current amplitude and phase value information extension 4 can directly gather the detected current amplitude and phase value information to the device 5 in a wireless transmission/receiving mode without error or with error being negligibly small. The rest of the parts which are not described are all the same as those in the first embodiment to the fifth embodiment and are not repeated.

Seventh embodiment, device for real-time online monitoring of metering error of high-voltage current transformer

The device for monitoring the metering error of the high-voltage current transformer on line in real time is a device for monitoring the metering error of the high-voltage current transformer on line in real time, truly and accurately and for a long time, and the specific structure of the device is jointly shown in fig. 3 and fig. 5. The device 5 of this example is characterized in that: the device 5 of this example may be provided with two detection accessories 4: one is a branch set 4 for wire-transmitting the detected current amplitude and phase value information in real time without error or with negligible error, and the structure of the mechanism for wire-transmitting the detected current amplitude and phase value information in this example is formed by connecting a digital sampling circuit, a digital amplifying circuit (a), an electro-optical conversion interface circuit, a transmission optical fiber, an electro-optical conversion interface circuit, a digital amplifying circuit (b) and a digital input circuit one by one. One extension 4 for wirelessly transmitting the detected current magnitude and phase value information in real time without or with negligible error, and the corresponding device 5 of this example also has a mechanism and structure for wirelessly receiving the detected current magnitude and phase value information. The wired transmission detection current amplitude and phase value information extension 4 and the wireless transmission detection current amplitude and phase value information extension 4 of the example have digital circuit structures, and can directly collect the detected current amplitude and phase value information on the device 5 by wired transmission and wireless transmission without errors or with errors being negligibly small. The extension set 4 for wired transmission of the detected current amplitude and phase value information and the respective circuits for wireless transmission of the detected current amplitude and phase value information extension set 4 in this example can be designed and manufactured by using the existing publicly known and commonly used technical contents and the publicly known and commercially available electronic circuit components, as long as they can complete or realize the functions of the respective circuits. The rest of the parts which are not described are all the same as those in the first embodiment to the sixth embodiment, and are not repeated.

Eight-embodiment real-time online monitoring device for metering error of high-voltage current transformer

The device for monitoring the metering error of the high-voltage current transformer on line in real time is a device for monitoring the metering error of the high-voltage current transformer on line in real time, truly and accurately and for a long time, and the specific structure of the device is jointly shown in figures 2 to 7. The device 5 of this example is characterized in that: the device 5 of this example may be provided with three detection accessories 4: a detection terminal 4 'for detecting current amplitude and phase value information in real time without error or with negligible error and a cable thereof, the detection terminal 4' of the embodiment has a fixed cable length, a fixed detection end head, fixed electrical structure parameters and the like, and the detection error caused when the current amplitude and phase value information is detected is fixed and known and can be deducted in the detection, and the detection becomes error-free or error-negligible in the measurement. One is the extension set 4 that transmits the detected current magnitude and phase value information in real time, error-free or error-negligible by wire. A slave unit 4 for wirelessly transmitting information on the magnitude and phase of the detected current in real time without or with negligible error, and a corresponding device 5 of this embodiment also has a mechanism and structure for wirelessly receiving information on the magnitude and phase of the detected current. The extension set 4 for wired transmission detection of current amplitude and phase value information and the extension set 4 for wireless transmission detection of current amplitude and phase value information in the example have digital circuit structures, and can directly collect the detected current amplitude and phase value information on the device 5 in a wired transmission and wireless transmission/reception mode without error or with error as small as negligibly small. The various configurations of the device 5 of this example, with which the three detection appendages 4 can be provided, are those described in the previous embodiments, and are not described in detail in the embodiments. The respective circuits of the slave set 4 for wired transmission of the detected current amplitude and phase value information and the slave set 4 for wireless transmission of the detected current amplitude and phase value information can be designed and manufactured by using the existing publicly known and commonly used technical contents and the publicly known and commercially available electronic circuit components, as long as they can complete or realize the functions of the respective circuits. The rest of the parts which are not described are all the same as those in the first embodiment to the seventh embodiment, and are not repeated.

Claims

1. The utility model provides a real-time on-line monitoring device of high-voltage current transformer metering error, the device's main part is including the mechanism and the structure of measurement or detection high-voltage current transformer current amplitude and phase value information, characterized in that: the device is provided with or comprises at least one detection accessory for detecting current amplitude value and phase value information in real time without error or with negligible error, wherein the detection accessory is a detection terminal or/and a branch machine:

a. the device or/and a detection end with at least one piece of information of measuring or detecting current amplitude value and phase value and a cable thereof; and/or the first and/or second light sources,

b. the device or/and the mechanism with at least one wired transmission or/and wireless transmission of information of the current amplitude and phase values measured or detected, the mechanism is composed of electronic mechanisms, the mechanism is connected with the main body part of the device through a wired cable for transmission or wirelessly transmits/receives, the mechanisms are split parts arranged outside the main body part of the device, and form a sub-set of the device, and the sub-set is composed of a shell and the electronic mechanisms inside the shell.

2. The device for real-time online monitoring of the metering error of the high-voltage current transformer according to claim 1 is characterized in that: the real-time on-line monitoring device for the metering error of the high-voltage current transformer has the specific structure that:

a. the structure of the device or/and at least one detection end for detecting the current amplitude value and phase value information of the belt is as follows: the device comprises a cable connected with a detection input end of the device and a current amplitude value and phase value information sampling detection end at the end part of the cable;

b. the device or/and at least one split or extension mechanism with wired transmission of detected current amplitude and phase value information, wherein the detailed structure of the mechanism for wired transmission of detected current amplitude and phase value information between an extension and the device is as follows: the sampling circuit of the current amplitude and phase value-analog/digital conversion circuit controlled by the controller-transmission circuit and transmission cable-interface circuit and connector-input circuit are functionally connected, before the movable connector of the interface circuit, the wired transmission extension of the device is formed, the movable connector is the input and output mechanism connecting end of the wired transmission extension, and the fixed connector forms the input circuit of the current amplitude and phase value information of the device;

c. the device or/and at least one split or extension mechanism for wirelessly transmitting the detected current amplitude and phase value information, wherein the detailed structure of the mechanism for wirelessly transmitting/receiving the detected current amplitude and phase value information between the extension and the device is as follows: the sampling circuit of the current amplitude and phase value, the analog/digital conversion circuit controlled by the controller, the transmitting circuit and the transmitting antenna thereof are functionally connected to form an extension for wirelessly transmitting the detected information of the current amplitude and phase value; the device also needs to be correspondingly provided with a mechanism for wirelessly receiving the detected current amplitude and phase value information, the mechanism for wirelessly receiving the detected current amplitude and phase value information is arranged on the main body part of the device and is formed by functionally connecting a receiving circuit of the current amplitude and phase value information, a receiving antenna thereof, an amplifying circuit and an input circuit, and the input circuit is the input circuit of the current amplitude and phase value information of the device.

3. The device for real-time online monitoring of the metering error of the high-voltage current transformer according to claim 1 is characterized in that: the real-time on-line monitoring device for the metering error of the high-voltage current transformer has the detailed structure that:

1) the detailed structure of the device or/and the detection end for detecting the information of the current amplitude value and the phase value is as follows: the detection cable of the detection end and the sampling detection end are provided with fixed structures;

2) the device or/and at least one extension with wired transmission of detected current amplitude and phase value information, wherein the detailed structure of the mechanism for wired transmission of the detected current amplitude and phase value information between the extension and the device is as follows:

a. the structure of the mechanism for wire transmission of detected current amplitude and phase value information is formed by connecting a sampling circuit, an analog-to-digital conversion circuit controlled by a controller, an electro-optical conversion interface circuit, a transmission optical fiber, a photoelectric conversion interface circuit, an amplifying circuit and an input circuit one by one; or,

b. the structure of the mechanism for wire transmission of detected current amplitude and phase value information is formed by connecting a digital sampling circuit, a digital amplification circuit (a), an electro-optical conversion interface circuit, a transmission optical fiber, a photoelectric conversion interface circuit, a digital amplification circuit (b) and a digital input circuit one by one;

3) the detailed structure of the mechanism for wirelessly transmitting/receiving the detected current amplitude and phase value information between the extension and the device is as follows:

a. the extension set for wirelessly transmitting the detected current amplitude and phase value information is structurally composed of a sampling circuit, an analog/digital conversion circuit controlled by a controller, a digital processing module, a wireless data transmission communication module and a transmitting antenna thereof in functional connection; the corresponding device is provided with a mechanism and a structure for wirelessly receiving detected current amplitude value and phase value information, and the mechanism and the structure are formed by functionally connecting a wireless data transmission communication module, a receiving antenna thereof, a digital processing module and an input circuit; or,

b. the structure of the extension for wirelessly transmitting the detected current amplitude and phase value information is formed by connecting a sampling circuit, an analog/digital conversion circuit controlled by a controller, a digital modulation circuit, a frequency conversion transmitting circuit and a transmitting antenna function thereof; the corresponding device is provided with a mechanism and a structure for wirelessly receiving and detecting the information of current amplitude and phase value, and the mechanism and the structure are formed by functionally connecting a receiving and frequency conversion circuit, a receiving antenna thereof, a digital demodulation circuit and an input circuit; or,

c. the extension set for wirelessly transmitting the detected current amplitude and phase value information is structurally composed of a digital sampling circuit, a digital amplifying circuit and a transmitting antenna thereof in functional connection; the corresponding device is provided with a mechanism and a structure for wirelessly receiving the detected current amplitude value and phase value information, and the mechanism and the structure are formed by functionally connecting a digital receiving amplifying circuit, a receiving antenna thereof and a digital input circuit.