CN112924915A - Mutual calibration system and method for voltage monitor - Google Patents
Mutual calibration system and method for voltage monitor Download PDFInfo
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- CN112924915A CN112924915A CN202110114667.4A CN202110114667A CN112924915A CN 112924915 A CN112924915 A CN 112924915A CN 202110114667 A CN202110114667 A CN 202110114667A CN 112924915 A CN112924915 A CN 112924915A
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Abstract
The invention relates to a mutual calibration system and a mutual calibration method of voltage monitors, wherein the system comprises a voltage monitor to be measured, a voltage monitor at one side of the voltage monitor to be measured and a remote control terminal, and calibration terminals are respectively arranged in the voltage monitor at one side of the voltage monitor to be measured and the voltage monitor at one side of the voltage monitor to be measured; the calibration terminal comprises a built-in source module, a receiving module, a result feedback module, a loop adjusting module and a first wireless module; the remote control terminal is placed at a monitoring main station of the voltage monitor and comprises a selection module, an execution module, a timing module, an analysis module, a calibration module and a second wireless module; the data exchange, the command sending and the command receiving of the calibration terminal and the remote control terminal are completed through the communication between the first wireless module and the second wireless module; data are issued and received between the voltage monitor to be measured and the voltage monitor on one side of the voltage monitor to be measured, and communication between the first wireless modules is completed. The invention ensures that the voltage monitors in operation can operate reliably.
Description
Technical Field
The application relates to the technical field of voltage monitoring, in particular to a mutual calibration system and method for a voltage monitor.
Background
With the large-scale installation and application of various electrical measuring instruments in an electric power system, the management personnel of the instruments face increasingly heavy management work. Regardless of the monitoring instrument or device, the problems of low precision, low measurement accuracy and low data quality caused by the aging of components and devices and the like along with the lapse of the operation time are faced. Especially, the voltage monitoring instrument is adopted to monitor the system voltage in a large area at present, and if the monitoring precision of the voltage monitoring instrument is reduced, the collection of the system voltage is influenced, and then the work of judging an original paper is influenced. Therefore, the stable operation of the power grid can be ensured only by ensuring the accurate operation of the voltage monitor.
At present, the qualification rate of the power supply voltage is an important index for evaluating the power supply quality of a power enterprise to users, and is also an important content for a government department to supervise the power supply enterprise. Under the current environment, the power supply enterprise will improve the power supply quality and conduct the continuity monitoring to the voltage as enterprise lifeline (voltage monitoring is the voltage deviation that the monitoring power system normal operating state slowly changes and arouses, adopts voltage detector to monitor usually), and the common equipment of adoption is exactly the voltage monitor.
The voltage monitor is an instrument capable of monitoring and counting voltage deviation caused by operation change of a power system, has the functions of monitoring, storing, analyzing, inquiring and parameter setting, and supports short message, wireless network and public network communication. However, along with the long-term operation of the equipment, the problems of reduced reliability, data loss and reduced measurement precision of the equipment can be caused by aging, failure and the like of components; at present, the voltage monitor is usually inspected by adopting a field regular inspection or inspection-by-pass mode, but because the installation environment of the voltage monitor is complex and the installation place is scattered, the manpower and material resources cost of the calibration work is high, so that the calibration work of the voltage monitor is difficult to develop.
Therefore, in the prior art, whether the function of the voltage monitor is failed or not is mostly monitored, the supervision on the most basic monitoring precision is omitted, and the remote calibration and the real-time calibration on the monitoring precision of the voltage monitor cannot be realized in the prior art.
Therefore, the invention provides a mutual calibration system for voltage monitors, which realizes mutual calibration of old voltage monitors and newly-installed voltage monitors of various types at any time or at regular intervals, and ensures reliable operation of each voltage monitor in operation.
Disclosure of Invention
The application provides a mutual calibration system and a mutual calibration method for voltage monitors, which aim to solve the problem that remote calibration and real-time calibration of monitoring precision of the voltage monitors cannot be realized in the prior art.
The technical scheme adopted by the application is as follows:
the invention provides a mutual calibration system of voltage monitors, which comprises a voltage monitor to be measured, a voltage monitor on one side of the voltage monitor to be measured and a remote control terminal, wherein the calibration terminal is arranged in the voltage monitor on one side of the voltage monitor to be measured and the voltage monitor on one side of the voltage monitor to be measured;
the calibration terminal comprises a built-in source module, a receiving module, a result feedback module, a loop adjusting module and a first wireless module, wherein the receiving module in the voltage monitor to be tested is in communication connection with the built-in source module of the internal calibration terminal of the voltage monitor at one side of the voltage monitor to be tested;
the remote control terminal is placed at a monitoring main station of the voltage monitor and comprises a selection module, an execution module, a timing module, an analysis module, a calibration module and a second wireless module,
the execution module is connected with a built-in source module of an internal calibration terminal of the voltage monitor at one side of the voltage monitor to be tested, the timing module is connected with the selection module, and the result feedback module, the selection module and the calibration module are all connected with the analysis module;
the data exchange, the command sending and the command receiving of the calibration terminal and the remote control terminal are completed through the communication between the first wireless module and the second wireless module; data are issued and received between the voltage monitor to be measured and the voltage monitor on one side of the voltage monitor to be measured, and communication between the first wireless modules is completed.
Furthermore, the timing module is used for selecting functions of starting at any time and starting at regular intervals, realizing the calibration work of the measurement precision of the voltage monitor at any time/regular intervals and inputting the serial number of the voltage monitor to be measured;
the selection module is used for determining the voltage monitor to be measured according to the serial number of the voltage monitor to be measured input through the timing module and issuing an instruction to the loop adjustment module of the voltage monitor to be measured;
the selection module is used for issuing a command of adjusting the voltage monitor to be a calibration measurement precision loop;
the loop adjusting module is used for adjusting the state of the voltage monitor to be measured according to the instruction issued by the selecting module, and selecting a sampling loop connecting circuit monitoring voltage loop or a calibration measurement precision loop.
Furthermore, the execution module is used for confirming a circuit for adjusting, calibrating and measuring the precision of the voltage monitor to be measured, and issuing an output test command to a built-in source module of an internal calibration terminal of the voltage monitor at one side of the voltage monitor to be measured;
a built-in source module of an internal calibration terminal of the voltage monitor on one side of the voltage monitor to be tested is used as a reference source and is used for outputting a reference voltage quantity to a receiving module of the voltage monitor to be tested;
the receiving module is used for receiving the reference voltage signal and transmitting the reference voltage to the sampling loop of the voltage monitor to be detected.
Further, the result feedback module is used for receiving the reference voltage quantity and the voltage measurement value output by the sampling loop of the voltage monitor to be measured and transmitting the reference voltage quantity and the voltage measurement value to the analysis module;
the analysis module is used for analyzing the error between the voltage measurement value output by the sampling loop of the voltage monitor to be measured and the reference voltage value and determining whether the voltage measurement precision of the voltage monitor to be measured meets the requirement.
Further, the calibration module is used for adjusting the calibration coefficient of the voltage monitor with the measurement accuracy not meeting the requirement when the measurement accuracy of the voltage monitor to be measured does not meet the requirement.
Further, the calibration interval of the periodic start function is 1 time/3 days.
Furthermore, the remote control terminal also comprises an alarm module, and the alarm module is connected with the calibration module;
the alarm module is used for accumulating the calibration times and giving an alarm when the calibration times reach more than two times.
Further, a mutual calibration method of the voltage monitor comprises the following steps:
s1: the timing module starts a calibration program, inputs the serial number of the voltage monitor to be measured and the serial number of the voltage monitor on one side of the voltage monitor to be measured, the selection module finds the voltage monitor to be measured and the voltage monitor on one side of the voltage monitor to be measured, and issues a sampling loop for disconnecting the voltage monitor to be measured and a line voltage monitoring loop and connecting a calibration measurement precision loop instruction to a loop adjustment module of the voltage monitor to be measured;
s2: the circuit adjusting module disconnects a sampling circuit of the voltage monitor to be measured from a line voltage monitoring circuit, connects the sampling circuit of the voltage monitor to be measured to a calibration measurement precision circuit, and sends a confirmation command to the execution module;
s3: the method comprises the following steps that an execution module confirms a calibration measurement precision loop and then issues an output test command to a built-in source module of a voltage monitor calibration terminal adjacent to one side of a voltage monitor to be tested, the built-in source module outputs a reference voltage quantity to a receiving module of the voltage monitor to be tested, and the receiving module transmits the reference voltage quantity to a sampling loop of the voltage monitor to be tested through the calibration measurement precision loop;
s4: a result feedback module of the voltage monitor to be tested receives a voltage measurement value and a reference voltage value output by a sampling loop of the voltage monitor to be tested and transmits the voltage measurement value and the reference voltage value to an analysis module;
s5: the analysis module compares and calculates an error between a reference voltage quantity sent by a voltage monitor calibration terminal built-in source module adjacent to the voltage monitor to be measured and a voltage measurement value of the voltage monitor to be measured, calculates the measurement precision of the voltage monitor and judges whether the requirement is met; when the judgment result meets the requirement, a command of adjusting the voltage monitor to be the normal line monitoring voltage is issued to the loop adjusting module through the selecting module, and the loop adjusting module of the voltage monitor to be measured breaks a current calibration measurement precision loop and connects the line voltage monitoring loop.
Further, when the judgment result does not meet the requirement, the analysis module sends a signal for adjusting the calibration coefficient of the voltage monitor to be measured to the calibration module, and the calibration module adjusts the calibration coefficient of the voltage monitor to be measured;
s6: and executing the steps S3-S5 until the judgment result meets the requirement, and the requirement is still not met after the adjustment is carried out twice, and the alarm module sends out alarm information to remind operation and maintenance personnel to check.
The technical scheme of the application has the following beneficial effects:
according to the mutual calibration system and method for the voltage monitors, a remote control terminal can be connected with a plurality of voltage monitors, the remote control terminal is connected with two voltage monitors which are respectively the voltage monitor to be measured and the voltage monitor on one side of the voltage monitor to be measured, the remote control terminal obtains a voltage measurement value collected by the voltage monitor to be measured and a reference voltage value of the voltage monitor on one side of the voltage monitor to be measured, the measurement precision of the voltage monitor to be measured is calculated through an error between the reference voltage value and the voltage measurement value, and when the measurement precision of the voltage monitor to be measured does not meet requirements, a calibration module adjusts a calibration coefficient of the voltage monitor to be measured.
The invention can realize the mutual calibration of various old voltage monitors and new voltage monitors at any time or at regular intervals, and ensures the reliable operation of the voltage monitors in each operation.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of the prior art (a voltage monitor having a self-diagnostic function);
fig. 2 is a schematic diagram of the prior art (a power distribution network operating voltage monitor);
FIG. 3 is a schematic diagram of a voltage monitor cross-calibration system;
FIG. 4 is a schematic diagram of a calibration process of a mutual calibration system of a voltage monitor (solid arrows are internal hard-wired, dashed arrows are wireless transmissions, and 1-10 are the sequence of the mutual calibration process);
FIG. 5 is a flow chart of a method for mutual calibration of voltage monitors;
illustration of the drawings:
wherein, 1-calibrating the terminal; 11-built-in source module; 12-a receiving module; 13-result feedback module; 14-a loop adjustment module; 15-a wireless module;
2-a remote control terminal; 21-a selection module; 22-an execution module; 23-a timing module; 24-an analysis module; 25-a calibration module; 26-a wireless module; 27-alarm module.
Detailed Description
As shown in fig. 1, the voltage monitor with the self-diagnosis function includes an acquisition module, a control module, a power module, a storage module, a communication positioning module and a self-diagnosis module; the self-checking module is configured to perform self-checking on the acquisition module, the control module, the power supply module, the storage module and the parameter configuration to obtain the operation working condition of each module; the communication positioning module is configured to transmit the operating conditions of the modules and the collected data associated with the position information to the voltage management system. The voltage monitor is additionally provided with a self-diagnosis function module which can detect the operation condition of the voltage monitor by self, and the module can be repaired and replaced in time once the ill-condition operation and maintenance module is found, so that the fault can be prevented or eliminated, and the safe and reliable operation of the voltage monitor can be ensured. Mainly prevents and eliminates the fault of the voltage monitor.
As shown in fig. 2, the power distribution network operating voltage monitor comprises a casing and a detection module, wherein the detection module is installed on the inner side of the casing, a power supply assembly is also installed on the inner side of the casing, the power supply assembly is electrically connected with the detection module, the detection module is connected with a panel through a wire, the panel is installed on the side edge of the casing, a display screen, a switch button and an operation button are arranged on the panel, and the display screen, the switch button and the operation button are all electrically connected with the detection module; this electric power distribution network operating voltage monitor, detection module is used for carrying out detection analysis to the electric power distribution network, main control chip can be through different interface connection host computer, main control chip can also send data for the target unit through GPRS communication module and signal transmission module through the method of wireless data transmission, convenience and fault tolerance have obtained the assurance, detection personnel can be at the very first time non-difference obtain the monitoring data like this, the voltage acquisition chip can catch the voltage arc characteristic of distribution network operation, the monitoring precision is good. The new voltage monitor with good monitoring accuracy cannot calibrate the old voltage monitor.
FIG. 3 is a schematic diagram of a mutual calibration system of voltage monitoring instruments according to the present embodiment;
particularly, the application provides a pair of voltage monitor mutual calibration system, including the voltage monitor and the remote control terminal 2 of the one side of the voltage monitor that awaits measuring, the voltage monitor that awaits measuring with the voltage monitor inside all installing of one side of the voltage monitor that awaits measuring calibration terminal 1.
Specifically, the calibration terminal 1 comprises a built-in source module 11, a receiving module 12, a result feedback module 13, a loop adjusting module 14 and a first wireless module 15, wherein the receiving module 12 inside the voltage monitor to be tested is in communication connection with the built-in source module 11 of the internal calibration terminal 1 of the voltage monitor on one side of the voltage monitor to be tested; the remote control terminal 2 is placed at a monitoring master station of a voltage monitor and comprises a selection module 21, an execution module 22, a timing module 23, an analysis module 24, a calibration module 25 and a second wireless module 26, wherein the execution module 22 is connected with a built-in source module 11 of the internal calibration terminal 1 of the voltage monitor at one side of the voltage monitor to be tested, the timing module 23 is connected with the selection module 21, and the result feedback module 13, the selection module 21 and the calibration module 25 are all connected with the analysis module 24;
the data exchange, command sending and receiving between the calibration terminal 1 and the remote control terminal 2 are completed through the communication between the first wireless module 15 and the second wireless module 26; data transmission and reception between the voltage monitor to be measured and the voltage monitor on one side of the voltage monitor to be measured are completed through communication between the first wireless modules 15.
The timing module 23 is used for selecting the functions of starting at any time and starting at regular intervals, realizing the calibration work of the measurement precision of the voltage monitor at any time/regular intervals, and inputting the serial number of the voltage monitor to be measured;
the selection module 21 is used for determining the voltage monitor to be measured according to the serial number of the voltage monitor to be measured input through the timing module 23 and issuing an instruction to the loop adjustment module 14 of the voltage monitor to be measured;
the selection module 21 is used for issuing a command of adjusting the voltage monitor to be a calibration measurement precision loop;
the loop adjusting module 14 is configured to adjust a state of the voltage monitor to be measured according to the instruction issued by the selecting module 21, and select whether the sampling loop connecting circuit monitors the voltage loop or calibrates the measurement precision loop.
The execution module 22 is configured to confirm a loop of the voltage monitor to be tested for adjusting the calibration measurement accuracy, and issue an "output test" command to the built-in source module 11 of the internal calibration terminal 1 of the voltage monitor on one side of the voltage monitor to be tested;
a built-in source module 11 of the internal calibration terminal 1 of the voltage monitor on one side of the voltage monitor to be tested is used as a reference source and is used for outputting a reference voltage quantity to a receiving module 12 of the voltage monitor to be tested;
the receiving module 12 is configured to receive a reference voltage signal and transmit the reference voltage to a sampling loop of a voltage monitor to be measured.
The result feedback module 13 is used for receiving the reference voltage quantity and the voltage measurement value output by the sampling loop of the voltage monitor to be measured and transmitting the reference voltage quantity and the voltage measurement value to the analysis module 24;
the analysis module 24 is configured to analyze an error between a voltage measurement value output by the sampling loop of the voltage monitor to be measured and a reference voltage value, and determine whether the voltage measurement accuracy of the voltage monitor to be measured meets a requirement.
The calibration module 25 is used for adjusting the calibration coefficient of the voltage monitor with the measurement accuracy not meeting the requirement when the measurement accuracy of the voltage monitor to be measured does not meet the requirement.
The calibration interval for the periodic start function is 1 time/3 days.
The remote control terminal 2 further comprises an alarm module 27, and the alarm module 27 is connected with the calibration module 25;
the alarm module 27 is used for accumulating the calibration times and giving an alarm when the calibration times reach more than two times.
FIG. 4 is a schematic diagram of a calibration process of a mutual calibration system of a voltage monitor (solid arrows are internal hard wires, dashed arrows are wireless transmissions, and 1-10 are a mutual calibration process sequence);
as shown in fig. 5, a flowchart of a mutual calibration method for voltage monitors of the present embodiment is shown, and the mutual calibration method for voltage monitors of the present embodiment includes the following steps:
s1: the timing module 23 starts a calibration program, inputs the serial number of the voltage monitor to be measured and the serial number of the voltage monitor on one side of the voltage monitor to be measured, the selection module 21 finds the voltage monitor to be measured and the voltage monitor on one side of the voltage monitor to be measured, and issues a command for disconnecting the sampling loop of the voltage monitor to be measured and the line voltage monitoring loop and connecting the sampling loop with the line voltage monitoring loop to be measured to calibrate the measurement precision loop to the loop adjustment module 14 of the voltage monitor to be measured;
s2: the loop adjusting module 14 disconnects the sampling loop of the voltage monitor to be measured from the line voltage monitoring loop, connects the sampling loop of the voltage monitor to be measured to the calibration measurement precision loop, and sends a confirmation command to the execution module 22;
s3: the execution module 22 sends an output test command to the built-in source module 11 of the voltage monitor calibration terminal adjacent to one side of the voltage monitor to be tested after confirming the calibration measurement precision loop, the built-in source module 11 outputs the reference voltage quantity to the receiving module 12 of the voltage monitor to be tested, and the receiving module 12 transmits the reference voltage quantity to the sampling loop of the voltage monitor to be tested through the calibration measurement precision loop;
each voltage monitor is provided with a calibration terminal 1; the method is characterized in that a built-in source module 11 of one side voltage monitor adjacent to the voltage monitor to be measured is used for sending reference voltage quantity to a receiving module 12 of the voltage monitor to be measured, so as to prevent the built-in source module of the voltage monitor to be measured from being in fault, and similarly, the built-in source module of the voltage monitor to be measured can be used for sending the reference voltage quantity to the receiving module 12 of one side voltage monitor adjacent to the voltage monitor to be measured, so that the voltage monitor to be measured and the voltage monitor adjacent to one side of the voltage monitor to be measured can be calibrated mutually.
S4: the result feedback module 13 of the voltage monitor to be measured receives the voltage measurement value (obtained by sampling the sampling loop of the voltage monitor to be measured) and the reference voltage value output by the sampling loop of the voltage monitor to be measured, and transmits the voltage measurement value and the reference voltage value to the analysis module 24;
s5: the analysis module 24 compares and calculates an error between a reference voltage quantity sent by the voltage monitor calibration terminal built-in source module 11 adjacent to the voltage monitor to be measured and a voltage measurement value of the voltage monitor to be measured, calculates the measurement precision of the voltage monitor, and judges whether the requirement is met; when the judgment result meets the requirement, a command of 'adjusting the voltage monitor to be the normal line monitoring voltage' is sent to the loop adjusting module 14 through the selecting module 21, the loop adjusting module 14 of the voltage monitor to be detected disconnects the current calibration measurement precision loop, and the line voltage monitoring loop is connected; when the judgment result does not meet the requirement (the sampling precision of the voltage monitor is unqualified), the analysis module 24 sends a signal for adjusting the calibration coefficient of the voltage monitor to be measured to the calibration module 25, and the calibration module 25 adjusts the calibration coefficient of the voltage monitor to be measured;
and setting the reference voltage as A, wherein the emitted reference voltage A is emitted by the voltage monitor on one side of the voltage monitor to be measured, and is definitely taken as a reference to be compared, and the reference voltage A passes through the voltage measurement value B of the voltage monitor to be measured after the voltage monitor to be measured adopts a loop. It is sufficient to calculate whether the relative error (B-a)/a is within the accuracy (level) range.
S6: and executing the steps S3-S5 until the judgment result meets the requirement, and the requirement is still not met after the adjustment is carried out twice, and the alarm module sends out alarm information to remind operation and maintenance personnel to check.
The voltage monitoring device comprises an execution module 22, a built-in source module 11, a receiving module 12 and a voltage monitoring device, wherein the execution module 22 confirms that a calibration measurement precision loop sends an output test command to the built-in source module 11, which is adjacent to two voltage monitoring device calibration terminals on one side of the voltage monitoring device to be measured, the built-in source module 11 outputs two reference voltage quantities to the receiving module 12 of the voltage monitoring device to be measured, and the receiving module 12 transmits the two reference voltage quantities to a sampling loop of the voltage monitoring device to be measured through the calibration measurement precision loop; the result feedback module 13 of the voltage monitor to be measured receives the voltage measurement value (obtained by sampling the sampling loop of the voltage monitor to be measured) and the two reference voltage values output by the sampling loop of the voltage monitor to be measured, and transmits the two reference voltage values to the analysis module 24; the analysis module 24 compares and calculates errors between two reference voltage values sent by two voltage monitor calibration terminal built-in source modules 11 adjacent to the voltage monitor to be measured and a voltage measurement value of the voltage monitor to be measured, calculates the measurement accuracy of the voltage monitor to be measured, and judges whether the two values meet requirements;
when the judgment results all meet the requirements, a command of 'adjusting the voltage monitor to be the normal line monitoring voltage' is sent to the loop adjusting module 14 through the selecting module 21, the loop adjusting module 14 of the voltage monitor to be detected disconnects the current calibration measurement precision loop, and the line voltage monitoring loop is connected; when the judgment result does not meet the requirement (the sampling precision of the voltage monitor is unqualified), the analysis module 24 sends a signal for adjusting the calibration coefficient of the voltage monitor to be measured to the calibration module 25, and the calibration module 25 adjusts the calibration coefficient of the voltage monitor to be measured;
in this embodiment, in order to prevent that a voltage monitoring instrument of one side of the voltage monitoring instrument that awaits measuring measures and has the mistake, increase one more and measure, two voltage monitoring instruments send reference voltage volume, and the voltage monitoring instrument analysis module that awaits measuring at last all judges nonconforming, and that voltage monitoring instrument sampling precision that awaits measuring is nonconforming.
The precision of the voltage monitor to be measured is monitored through two voltage monitors on one side of the voltage monitor to be measured, when two voltage monitors judge that the precision of the voltage monitor to be measured is unqualified, the remote control terminal calibrates the voltage monitor, collects the precision again after calibration, still is qualified to send alarm information after twice calibration, and the operation and maintenance personnel are prompted to check. The remote control terminal can carry out remote calibration at any time or at regular intervals according to needs.
The invention can realize the mutual calibration of various old voltage monitors and new voltage monitors at any time or at regular intervals, and ensures the reliable operation of the voltage monitors in each operation.
The embodiments provided in the present application are only a few examples of the general concept of the present application, and do not limit the scope of the present application. Any other embodiments extended according to the scheme of the present application without inventive efforts will be within the scope of protection of the present application for a person skilled in the art.
Claims (9)
1. The mutual calibration system of the voltage monitors is characterized by comprising a voltage monitor to be tested, a voltage monitor on one side of the voltage monitor to be tested and a remote control terminal (2), wherein the calibration terminal (1) is arranged in the voltage monitors on the two sides of the voltage monitor to be tested and the voltage monitor;
the calibration terminal (1) comprises a built-in source module (11), a receiving module (12), a result feedback module (13), a loop adjusting module (14) and a first wireless module (15), wherein the receiving module (12) inside the voltage monitor to be tested is in communication connection with the built-in source module (11) of the voltage monitor internal calibration terminal (1) on one side of the voltage monitor to be tested;
the remote control terminal (2) is placed at a monitoring master station of the voltage monitor and comprises a selection module (21), an execution module (22), a timing module (23), an analysis module (24), a calibration module (25) and a second wireless module (26), wherein the execution module (22) is connected with a built-in source module (11) of the internal calibration terminal (1) of the voltage monitor at one side of the voltage monitor to be tested, the timing module (23) is connected with the selection module (21), and the result feedback module (13), the selection module (21) and the calibration module (25) are connected with the analysis module (24);
the data exchange, the command sending and the receiving of the calibration terminal (1) and the remote control terminal (2) are completed through the communication between the first wireless module (15) and the second wireless module (26); data transmission and reception between the voltage monitor to be measured and the voltage monitor on one side of the voltage monitor to be measured are completed through communication between the first wireless modules (15).
2. The voltage monitor mutual calibration system as claimed in claim 1, wherein the timing module (23) is configured to select a function of start-at-time and start-at-time periodically, to perform calibration work of measurement accuracy on the voltage monitor at any time/periodically, and to input a serial number of the voltage monitor to be measured;
the selection module (21) is used for determining the voltage monitor to be tested according to the serial number of the voltage monitor to be tested, which is input through the timing module (23), and issuing an instruction to the loop adjustment module (14) of the voltage monitor to be tested;
the selection module (21) is used for issuing a command of adjusting the voltage monitor to be a calibration measurement precision loop;
the loop adjusting module (14) is used for adjusting the state of the voltage monitor to be measured according to the instruction issued by the selecting module (21), and selecting a sampling loop connecting circuit monitoring voltage loop or a calibration measurement precision loop.
3. The voltage monitor mutual calibration system according to claim 1, wherein the execution module (22) is configured to confirm that the voltage monitor to be tested adjusts the calibration measurement accuracy loop, and issue an "output test" command to the built-in source module (11) of the internal calibration terminal (1) of the voltage monitor on one side of the voltage monitor to be tested;
a built-in source module (11) of the internal calibration terminal (1) of the voltage monitor at one side of the voltage monitor to be tested is used as a reference source and is used for outputting a reference voltage quantity to a receiving module (12) of the voltage monitor to be tested;
the receiving module (12) is used for receiving the reference voltage signal and transmitting the reference voltage to the sampling loop of the voltage monitor to be detected.
4. The voltage monitor mutual calibration system as claimed in claim 1, wherein the result feedback module (13) is configured to receive the reference voltage and the voltage measurement value output by the sampling loop of the voltage monitor to be tested, and transmit the reference voltage and the voltage measurement value to the analysis module (24);
and the analysis module (24) is used for analyzing the error between the voltage measurement value output by the sampling loop of the voltage monitor to be measured and the reference voltage and determining whether the voltage measurement precision of the voltage monitor to be measured meets the requirement.
5. The voltage monitor mutual calibration system according to claim 1, wherein the calibration module (25) is configured to adjust the calibration coefficient of the voltage monitor whose measurement accuracy does not meet the requirement when the measurement accuracy of the voltage monitor to be measured does not meet the requirement.
6. The voltage monitor mutual calibration system of claim 2, wherein the calibration interval for the periodic start function is 1/3 day.
7. The voltage monitor mutual calibration system according to claim 1, wherein the remote control terminal (2) further comprises an alarm module (27), the alarm module (27) being connected to the calibration module (25);
the alarm module (27) is used for accumulating the calibration times and giving an alarm when the calibration times reach more than two times.
8. A mutual calibration method of voltage monitors is applied to the mutual calibration system of the voltage monitors as claimed in any one of claims 1 to 7, and is characterized by comprising the following steps:
s1: the timing module (23) starts a calibration program, inputs the serial number of the voltage monitor to be measured and the serial number of the voltage monitor on one side of the voltage monitor to be measured, the selection module (21) finds the voltage monitor to be measured and the voltage monitor on one side of the voltage monitor to be measured, and issues a sampling loop and a line voltage monitoring loop which disconnect the voltage monitor to be measured and connect a calibration measurement precision loop instruction to a loop adjustment module (14) of the voltage monitor to be measured;
s2: the circuit adjusting module (14) disconnects a sampling circuit of the voltage monitor to be tested from a line voltage monitoring circuit, connects the sampling circuit of the voltage monitor to be tested to a calibration measurement precision circuit, and sends a confirmation command to the execution module (22);
s3: the execution module (22) confirms that the calibration measurement precision loop sends an 'output test' command to a built-in source module (11) of a voltage monitor calibration terminal (1) adjacent to one side of a voltage monitor to be measured, the built-in source module (11) of the voltage monitor calibration terminal (1) adjacent to one side of the voltage monitor to be measured outputs a reference voltage quantity to a receiving module (12) of the voltage monitor to be measured, and the receiving module (12) transmits the reference voltage quantity to a sampling loop of the voltage monitor to be measured through the calibration measurement precision loop;
s4: a result feedback module (13) of the voltage monitor to be tested receives a voltage measurement value and a reference voltage value output by a sampling loop of the voltage monitor to be tested and transmits the voltage measurement value and the reference voltage value to an analysis module (24);
s5: the analysis module (24) compares and calculates an error between a reference voltage quantity sent by a built-in source module (11) of the adjacent voltage monitor calibration terminal adjacent to the voltage monitor to be measured and a voltage measurement value of the voltage monitor to be measured, calculates the measurement precision of the voltage monitor and judges whether the requirement is met; when the judgment result meets the requirement, a command of adjusting the voltage monitor to be the normal line monitoring voltage is issued to the loop adjusting module (14) through the selecting module (21), and the loop adjusting module (14) of the voltage monitor to be detected breaks a current calibration measurement precision loop and connects the line voltage monitoring loop.
9. The mutual calibration method of the voltage monitors according to claim 8, wherein when the judgment result does not meet the requirement, the analysis module (24) sends a signal for adjusting the calibration coefficient of the voltage monitor to be measured to the calibration module (25), and the calibration module (25) adjusts the calibration coefficient of the voltage monitor to be measured;
s6: and executing the steps S3-S5 until the judgment result meets the requirement, and the requirement is still not met after the adjustment is carried out twice, and the alarm module sends out alarm information to remind operation and maintenance personnel to check.
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Citations (32)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9005766D0 (en) * | 1990-03-14 | 1990-05-09 | British Telecomm | Calibrator |
| US4949029A (en) * | 1988-07-15 | 1990-08-14 | Schulmberger Industries, Inc. | Adjustment circuit and method for solid-state electricity meter |
| KR20000073113A (en) * | 1999-05-06 | 2000-12-05 | 장형서 | System and method for calibrating digital measuring instrument remotely using internet |
| DE102007047558A1 (en) * | 2007-09-28 | 2009-04-02 | Siemens Ag | Electronic switching unit for use in overcurrent tripping device of low-voltage circuit breaker, is coupled to calibration system over linking or transmission units such as communication bus, broadband Internet and interface |
| US20090157338A1 (en) * | 2006-08-30 | 2009-06-18 | Mettler-Toledo Ag | Measuring method and apparatus for potentiometric measuring probes |
| CN202210151U (en) * | 2011-09-21 | 2012-05-02 | 四川省电力公司广安电业局 | System for remote checking and monitoring for electric energy metering device |
| DE102011080874A1 (en) * | 2011-08-12 | 2013-02-14 | Bender Gmbh & Co. Kg | Electrical measuring device for measuring electrical currents, comprises connecting unit for connecting measuring current transformer, and calibration loop for calibration of measuring unit of measuring device |
| CN102981137A (en) * | 2012-11-27 | 2013-03-20 | 辽宁省电力有限公司电力科学研究院 | Remote intelligent verifying device and method of voltage monitor based on general packet radio service (GPRS)/global system for mobile communication (GSM) network |
| CN103558570A (en) * | 2013-11-06 | 2014-02-05 | 国家电网公司 | Portable voltage monitor field calibration tester |
| WO2014071753A1 (en) * | 2012-11-06 | 2014-05-15 | 国家电网公司 | Electronic transformer calibrator calibration device and method based on digital source |
| CN104181489A (en) * | 2014-09-04 | 2014-12-03 | 国家电网公司 | Calibration system for substation alternating-current sampling and measuring device |
| CN104777368A (en) * | 2015-05-05 | 2015-07-15 | 成都电兴科技有限责任公司 | On-line monitoring instrument and detection method of alternating current variable-frequency ground resistor |
| CN204595099U (en) * | 2015-05-05 | 2015-08-26 | 成都电兴科技有限责任公司 | AC frequency conversion stake resistance on-line computing model |
| CN105092952A (en) * | 2015-08-12 | 2015-11-25 | 国家电网公司 | DC signal monitor |
| CN204832369U (en) * | 2015-04-30 | 2015-12-02 | 航天科工深圳（集团）有限公司 | Detection apparatus for power equipment |
| CN105652230A (en) * | 2016-03-30 | 2016-06-08 | 国网电力科学研究院武汉南瑞有限责任公司 | Direct-current current transformer field checking device and method based on standard source |
| CN105785306A (en) * | 2015-03-23 | 2016-07-20 | 国家电网公司 | Voltage transformer on-line group calibration method and apparatus |
| CN105842510A (en) * | 2016-03-17 | 2016-08-10 | 中国电力科学研究院 | Electronic transformer with self-calibration function and self-calibration method thereof |
| US20160320434A1 (en) * | 2013-10-09 | 2016-11-03 | Abb Research Ltd. | Current measurement device and method using a rogowski type current transducer |
| CN107422291A (en) * | 2017-09-14 | 2017-12-01 | 中国电力科学研究院 | A kind of AC extra high voltage voltage transformer error check system and method |
| CN107607897A (en) * | 2017-08-29 | 2018-01-19 | 国网湖南省电力公司 | A kind of voltage monitoring instrument on-line testing and prediction meanss and method |
| CN107942273A (en) * | 2017-10-24 | 2018-04-20 | 国网山西省电力公司电力科学研究院 | The accuracy calibration method of monitoring device is scurried into exchange in DC power system |
| CN108885247A (en) * | 2016-03-24 | 2018-11-23 | 韩国标准科学研究院 | For calibrating the device and method of DC voltage function |
| CN109633507A (en) * | 2018-11-30 | 2019-04-16 | 云南电网有限责任公司红河供电局 | Voltage monitoring instrument with self-diagnostic function |
| CN110018682A (en) * | 2019-05-14 | 2019-07-16 | 中国核动力研究设计院 | The Analog input mModule automated calibration system and method for nuclear safe level DCS |
| CN209247939U (en) * | 2018-11-16 | 2019-08-13 | 广东电网有限责任公司 | The point off apparatus and system of current transformer polarity verification |
| CN209400641U (en) * | 2018-11-16 | 2019-09-17 | 广东电网有限责任公司 | Current transformer polarity tester and system |
| CN110596633A (en) * | 2019-10-16 | 2019-12-20 | 上海市计量测试技术研究院 | Calibration system and calibration method of analog input type electronic transformer calibrator |
| CN110988520A (en) * | 2019-11-13 | 2020-04-10 | 广西电网有限责任公司 | Waveform analysis method without error in time scale |
| CN210833912U (en) * | 2019-12-31 | 2020-06-23 | 苏州迅鹏仪器仪表有限公司 | Temperature monitoring instrument and system capable of realizing automatic temperature calibration |
| CN112034407A (en) * | 2020-09-10 | 2020-12-04 | 云南电网有限责任公司电力科学研究院 | Power frequency alternating current voltage self-calibration unit and system |
| CN112162231A (en) * | 2020-09-30 | 2021-01-01 | 中国电力科学研究院有限公司 | Calibration system and method for electronic transformer calibrator |
-
2021
- 2021-01-27 CN CN202110114667.4A patent/CN112924915B/en active Active
Patent Citations (32)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4949029A (en) * | 1988-07-15 | 1990-08-14 | Schulmberger Industries, Inc. | Adjustment circuit and method for solid-state electricity meter |
| GB9005766D0 (en) * | 1990-03-14 | 1990-05-09 | British Telecomm | Calibrator |
| KR20000073113A (en) * | 1999-05-06 | 2000-12-05 | 장형서 | System and method for calibrating digital measuring instrument remotely using internet |
| US20090157338A1 (en) * | 2006-08-30 | 2009-06-18 | Mettler-Toledo Ag | Measuring method and apparatus for potentiometric measuring probes |
| DE102007047558A1 (en) * | 2007-09-28 | 2009-04-02 | Siemens Ag | Electronic switching unit for use in overcurrent tripping device of low-voltage circuit breaker, is coupled to calibration system over linking or transmission units such as communication bus, broadband Internet and interface |
| DE102011080874A1 (en) * | 2011-08-12 | 2013-02-14 | Bender Gmbh & Co. Kg | Electrical measuring device for measuring electrical currents, comprises connecting unit for connecting measuring current transformer, and calibration loop for calibration of measuring unit of measuring device |
| CN202210151U (en) * | 2011-09-21 | 2012-05-02 | 四川省电力公司广安电业局 | System for remote checking and monitoring for electric energy metering device |
| WO2014071753A1 (en) * | 2012-11-06 | 2014-05-15 | 国家电网公司 | Electronic transformer calibrator calibration device and method based on digital source |
| CN102981137A (en) * | 2012-11-27 | 2013-03-20 | 辽宁省电力有限公司电力科学研究院 | Remote intelligent verifying device and method of voltage monitor based on general packet radio service (GPRS)/global system for mobile communication (GSM) network |
| US20160320434A1 (en) * | 2013-10-09 | 2016-11-03 | Abb Research Ltd. | Current measurement device and method using a rogowski type current transducer |
| CN103558570A (en) * | 2013-11-06 | 2014-02-05 | 国家电网公司 | Portable voltage monitor field calibration tester |
| CN104181489A (en) * | 2014-09-04 | 2014-12-03 | 国家电网公司 | Calibration system for substation alternating-current sampling and measuring device |
| CN105785306A (en) * | 2015-03-23 | 2016-07-20 | 国家电网公司 | Voltage transformer on-line group calibration method and apparatus |
| CN204832369U (en) * | 2015-04-30 | 2015-12-02 | 航天科工深圳（集团）有限公司 | Detection apparatus for power equipment |
| CN204595099U (en) * | 2015-05-05 | 2015-08-26 | 成都电兴科技有限责任公司 | AC frequency conversion stake resistance on-line computing model |
| CN104777368A (en) * | 2015-05-05 | 2015-07-15 | 成都电兴科技有限责任公司 | On-line monitoring instrument and detection method of alternating current variable-frequency ground resistor |
| CN105092952A (en) * | 2015-08-12 | 2015-11-25 | 国家电网公司 | DC signal monitor |
| CN105842510A (en) * | 2016-03-17 | 2016-08-10 | 中国电力科学研究院 | Electronic transformer with self-calibration function and self-calibration method thereof |
| CN108885247A (en) * | 2016-03-24 | 2018-11-23 | 韩国标准科学研究院 | For calibrating the device and method of DC voltage function |
| CN105652230A (en) * | 2016-03-30 | 2016-06-08 | 国网电力科学研究院武汉南瑞有限责任公司 | Direct-current current transformer field checking device and method based on standard source |
| CN107607897A (en) * | 2017-08-29 | 2018-01-19 | 国网湖南省电力公司 | A kind of voltage monitoring instrument on-line testing and prediction meanss and method |
| CN107422291A (en) * | 2017-09-14 | 2017-12-01 | 中国电力科学研究院 | A kind of AC extra high voltage voltage transformer error check system and method |
| CN107942273A (en) * | 2017-10-24 | 2018-04-20 | 国网山西省电力公司电力科学研究院 | The accuracy calibration method of monitoring device is scurried into exchange in DC power system |
| CN209247939U (en) * | 2018-11-16 | 2019-08-13 | 广东电网有限责任公司 | The point off apparatus and system of current transformer polarity verification |
| CN209400641U (en) * | 2018-11-16 | 2019-09-17 | 广东电网有限责任公司 | Current transformer polarity tester and system |
| CN109633507A (en) * | 2018-11-30 | 2019-04-16 | 云南电网有限责任公司红河供电局 | Voltage monitoring instrument with self-diagnostic function |
| CN110018682A (en) * | 2019-05-14 | 2019-07-16 | 中国核动力研究设计院 | The Analog input mModule automated calibration system and method for nuclear safe level DCS |
| CN110596633A (en) * | 2019-10-16 | 2019-12-20 | 上海市计量测试技术研究院 | Calibration system and calibration method of analog input type electronic transformer calibrator |
| CN110988520A (en) * | 2019-11-13 | 2020-04-10 | 广西电网有限责任公司 | Waveform analysis method without error in time scale |
| CN210833912U (en) * | 2019-12-31 | 2020-06-23 | 苏州迅鹏仪器仪表有限公司 | Temperature monitoring instrument and system capable of realizing automatic temperature calibration |
| CN112034407A (en) * | 2020-09-10 | 2020-12-04 | 云南电网有限责任公司电力科学研究院 | Power frequency alternating current voltage self-calibration unit and system |
| CN112162231A (en) * | 2020-09-30 | 2021-01-01 | 中国电力科学研究院有限公司 | Calibration system and method for electronic transformer calibrator |
Non-Patent Citations (2)
| Title |
|---|
| 王保和;林宣渲;张克武;李利贤;赖振学;: "高性能GPS校准电压监测仪校验系统设计与开发", 电气时代, no. 01 * |
| 盛占石;刘赫;谭延良;孙俊;张兵;: "基于GPRS技术的智能电压监测仪的研制", 仪表技术与传感器, no. 08 * |
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