CN101852844A - Data calibration device of AC sampling and measuring device and method thereof - Google Patents
Data calibration device of AC sampling and measuring device and method thereof Download PDFInfo
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- CN101852844A CN101852844A CN200910081412A CN200910081412A CN101852844A CN 101852844 A CN101852844 A CN 101852844A CN 200910081412 A CN200910081412 A CN 200910081412A CN 200910081412 A CN200910081412 A CN 200910081412A CN 101852844 A CN101852844 A CN 101852844A
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Abstract
The invention provides a data calibration device of an AC sampling and measuring device and a method thereof. The data calibration device comprises a measurement data acquisition unit which is connected with the AC sampling and measuring device and is used for obtaining electrical measurement data of the AC sampling and measuring device, a standard data acquisition unit which is connected in an identical loop of the AC sampling and measuring device and is used for obtaining standard electrical measurement data of the loop, and an error comparing unit which is used for comparing the electrical measurement data and the standard electrical measurement data and obtaining comparing data of electrical measurement. Therefore, the invention provides a method and a system realizing real-time and automatic error calibration for the online operating AC sampling and measuring device, thereby reducing the calibration cost, and improving the security and stability of the power system.
Description
Technical field
The present invention is a kind of data calibration device and method of AC sampling and measuring device about power domain, sampled measurements verification field in the electrical network concretely.
Background technology
Electric system factory station complex automatic system has been widely used in power plant at different levels, transformer station because of it has automaticity height, advanced technology, plurality of advantages such as reliable.Along with extensively quoting of comprehensive automation of electric power system equipment, the AC sampling and measuring device of various models also constantly enters monitoring and verification working range.
AC sampling and measuring device is the widely used visual plant of power system monitoring electrical measurement, particularly replace pointer instrument and meter after, the major equipment that has been absolutely necessary, AC sampling and measuring device mainly comprise each electrical measurement collection, calculating, storage etc.Must periodic check AC sampling and measuring device device according to the Q/GDW 140-2006 of State Grid Corporation of China " AC sampling and measuring device operation test rule of management " and " national grid marketing (2005) 347 " number " AC sampling and measuring device verification standard ", at least should the verification of annual on-the-spot real load once, on-the-spot virtual load verification in per 3 years once.
The verification mode of the AC sampling and measuring device (hereinafter to be referred as " friendship device for picking ") that adopts is at present: artificial on-the-spot periodic check, the current return of standard scale is concatenated into by in the current return of verification friendship device for picking, the voltage circuit of standard scale is also received by verification and is handed on the voltage circuit of device for picking, by the charge value that 2 people read standard scale simultaneously and hand over device for picking to show, process calculates the verify error of handing over device for picking.
This mode gets subject matter and is: 1, field-checking needs to carry out hot line job on secondary voltage, current return, the current return open circuit easily takes place, the security incident of voltage circuit short circuit; 2, on-the-spot sense cycle is long, can't monitor operating AC sampling and measuring device error in real time; 3, the field-checking workload is big, hand over now device for picking general be applied in 500kV, 220kV transformer station, 110kV transformer station spreads all over the problems such as power supply hinge of whole electrical network especially; 4, can not in time find the fault that between cycle detection, takes place, as: problem such as overproof, error connection, device damage.
The disclosed content of Chinese patent application 91106409.5,00211787 is introduced mode it is herein incorporated, with as prior art of the present invention.
Summary of the invention
The object of the present invention is to provide a kind of data calibration device of AC sampling and measuring device, can carry out the automatic verification of Real-time Error the on-line operation AC sampling and measuring device.
Another object of the present invention is to provide a kind of data verification method of AC sampling and measuring device, can carry out the method for the automatic verification of Real-time Error the on-line operation AC sampling and measuring device.
To achieve these goals, the embodiment of the invention provides a kind of data calibration device of AC sampling and measuring device, this device comprises: the measurement data acquiring unit, be connected in described AC sampling and measuring device, and be used to obtain the electrical measurement data of this AC sampling and measuring device; The normal data acquiring unit is connected in the same loop of described AC sampling and measuring device, is used to obtain the standard electric measurement data in this loop; The error comparing unit is used for more described electrical measurement data and standard electric measurement data, obtains the electrical measurement comparing data.
To achieve these goals, the embodiment of the invention also provides a kind of data verification method of AC sampling and measuring device, and this method comprises: the electrical measurement data that obtain AC sampling and measuring device; Obtain the standard electric measurement data in this same loop of AC sampling and measuring device; More described electrical measurement data and standard electric measurement data obtain the electrical measurement comparing data.
The beneficial effect of the embodiment of the invention is, a kind of method that can carry out the automatic verification of Real-time Error to the on-line operation AC sampling and measuring device is provided; Reduced the cost of verification work; The security and the stability of electric system have been improved.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the schematic diagram of the data calibration device of AC sampling and measuring device provided by the invention;
Fig. 2 is the structural drawing of the data calibration device of a kind of AC sampling and measuring device of providing of the embodiment of the invention;
Fig. 3 is the structural drawing of the data calibration device of a kind of AC sampling and measuring device of providing of the embodiment of the invention;
Fig. 4 is the structural drawing of loop switch unit in the data calibration device of the AC sampling and measuring device that provides of the embodiment of the invention;
Fig. 5 is the circuit diagram of current open protected location in the data calibration device of the AC sampling and measuring device that provides of the embodiment of the invention;
Fig. 6 is the circuit diagram of voltage short-circuit protection unit in the data calibration device of the AC sampling and measuring device that provides of the embodiment of the invention;
Fig. 7 is the process flow diagram of the data verification method of a kind of AC sampling and measuring device of providing of the embodiment of the invention;
Fig. 8 is the structural representation of the data calibration device of the AC sampling and measuring device that provides of one embodiment of the invention;
Fig. 9 is the structural drawing of the data calibration device of the AC sampling and measuring device that provides of another embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described.Obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
The embodiment of the invention provides a kind of data calibration device and method of AC sampling and measuring device.The present invention is described in detail below in conjunction with accompanying drawing.
The data calibration device of AC sampling and measuring device provided by the invention (hereinafter to be referred as monitoring system) is the monitoring system that integrates signal, data acquisition and processing, data base administration, the automatic verification of on-the-spot AC sampling and measuring device error, status monitoring, warning, communication.Major function comprises: the functions such as error of the error of local control verification AC sampling and measuring device, warning, Long-distance Control verification AC sampling and measuring device, store test data realizes storage automatically to data downloaded, forms the error form.
As shown in Figure 1, schematic diagram for the data calibration device of AC sampling and measuring device provided by the invention, comprising: monitoring system inside is equipped with the standard scale of pin-point accuracy grade at the scene, gather signals such as standard scale voltage, electric current, frequency by multistage switching device shifter, the electrical measurement data of data processing with by the electrical measurement data of checking circuit relatively and the error of calculation, record result, report to the police when comparing to determine by the overproof then prompting in verification loop.Different circuits are switched by check system control in a plurality of loops in the transformer station, can carry out cycle detection.
As shown in Figure 2, be the structural drawing of the data calibration device of AC sampling and measuring device provided by the invention, wherein, measurement data acquiring unit 201 is connected in described AC sampling and measuring device, is used to obtain the electrical measurement data of this AC sampling and measuring device;
Normal data acquiring unit 202 is connected in the same loop of described AC sampling and measuring device, is used to obtain the standard electric measurement data in this loop;
Error comparing unit 203 is used for more described electrical measurement data and standard electric measurement data, obtains the electrical measurement comparing data.
The data calibration device of the AC sampling and measuring device that provides by the foregoing description can solve at present can not be effectively, test in good time is in the problem that is delivering stream sampling and measuring device error; And do not need execute-in-place.
As shown in Figure 3, structural drawing for the data calibration device of a kind of AC sampling and measuring device provided by the invention, wherein, the measurement data acquiring unit, be connected in described AC sampling and measuring device, be used to obtain the electrical measurement data of this AC sampling and measuring device, these electrical measurement data comprise: magnitude of voltage, current value, phase value, performance number and frequency values.
The normal data acquiring unit is connected in the same loop of described AC sampling and measuring device, is used to obtain the standard electric measurement data in this loop;
The error comparing unit is used for more described electrical measurement data and standard electric measurement data, obtains the electrical measurement comparing data.
The loop switch unit is connected to the loop and the described normal data acquiring unit of a plurality of AC sampling and measuring devices, is used for switching standards data capture unit and being connected by the loop of verification AC sampling and measuring device.
Control module is used for control loop switch unit switching circuit; This control module comprises alarm unit, is used for storing relatively alert data, and gives the alarm during greater than described relatively alert data in described electrical measurement comparing data.
Current open protected location and voltage short-circuit protection unit are used to protect voltage, current return.
As shown in Figure 4, be the structural drawing of loop switch unit in the data calibration device of AC sampling and measuring device provided by the invention, this loop switch unit is switched by two-stage to be formed:
First order switch unit is made up of 64 circuits, and each circuit is made up of three-phase six line current input signals, three-phase and four-line voltage input signal, has adopted current return open-circuit-protection unit and voltage circuit short-circuit protection unit simultaneously; Friendship is adopted the Monitoring and Controlling unit and is sent the first order, second level control signal, guarantees that 64 circuits of the first order have only a line signal to enter data acquisition.
As shown in Figure 5; circuit diagram for current open protected location in the data calibration device of AC sampling and measuring device provided by the invention; when the loop that this current open protected location connects is not selected; switch JRa is not closed, the mutual JRb closure of switch; the mutual inductor secondary current constitutes complete closed-loop path through JRb; alarm voltage U0=0 does not start alarm unit.
When this loop is selected, the JRa closure, JRb opens, and the mutual inductor secondary current constitutes complete closed-loop path through JRa and standard scale (normal data acquiring unit) current return, and alarm voltage U0=0 does not start alarm unit.
When open circuit took place in the protected area, mutual inductor secondary current positive half-wave constituted complete closed-loop path through D1, D3, and negative half-wave constitutes complete closed-loop path through D2, D4, and current transformer still is in normal operating conditions.Alarm voltage U0 ≠ 0 starts alarm unit, and the current open fault takes place in the prompting protected area.
As shown in Figure 6; circuit diagram for voltage short-circuit protection unit in the data calibration device of AC sampling and measuring device provided by the invention; when the loop of this voltage short-circuit protection unit connection is not selected; TRa is not closed; fuse protection device B goes up absence of voltage; alarm voltage U0=0 does not start alarm unit.
When this loop is selected, the TRa closure, when the protected area was not short-circuited, alarm voltage U0=0 did not start alarm unit.
When protected loop is short-circuited, bear whole secondary voltages on the fuse protection device B, voltage transformer (VT) still is in normal operating conditions.Alarm voltage U0 ≠ 0 starts alarm unit.The voltage short trouble takes place in the prompting protected area.
As shown in Figure 7, be the process flow diagram of the data verification method of a kind of AC sampling and measuring device provided by the invention, this method is used for the data of existing AC sampling and measuring device are detected and verification, comprises step:
Wherein, the method that provides of another embodiment of the present invention also comprises step: switch described normal data acquiring unit and being connected by the loop of verification AC sampling and measuring device by the loop switch unit.
Wherein, the method that provides of another embodiment of the present invention also comprises step: give the alarm by alarm unit during greater than described relatively alert data in described electrical measurement comparing data.
The data calibration device of AC sampling and measuring device provided by the invention is by the modular construction design, and specifically comprise: online actual load calibration device and main website of system far-end operation are held by transformer station.The specific electric load calibration equipment comprise current/voltage switching device shifter, standard scale, data processing and communication controller, transfer and net parts such as transferring workstation.Data processing and communication controller finish data collection, storage, safeguard, upload and function such as communication, ground is transferred and net transfers workstation mainly to realize the functions such as inquiry, analysis and diagnosis of data.Main website of system and factory's station end remote monitoring terminal device adopt the network communication mode based on ICP/IP protocol.
Its exploitation and application flow mainly comprise:
1. develop the software systems of calibration equipment;
2. design AC sampling and measuring device electrical measurement acquisition subsystem;
3. design standards table electrical measurement acquisition subsystem;
4. design the comparer system of AC sampling and measuring device and standard electric measured value;
5. development and design current/voltage switching device shifter control flow;
6. development and design is at specific electric load calibration equipment control flow;
7. on-the-spot installation, debugging, trial run;
The AC sampling and measuring device that the embodiment of the invention provides comprises: signals such as the voltage of on-the-spot multichannel transformer secondary circuit, electric current insert the loop switching device shifter, be responsible for the control loop switching device shifter by data processing and communication controller and carry out gating, transformer secondary circuit behind the switching device shifter gating of loop inserts and monitors standard scale, by data processing and communication controller the standard scale data is gathered and is handled.Data processing and communication controller are responsible for monitoring reaching carrying out error ratio from the measurement data of remote station with the measurement data that monitors standard scale, and can pass through the detected data of data network teletransmission.
As Fig. 8 and shown in Figure 9, the structural representation and the structural drawing of the data calibration device of the AC sampling and measuring device that provides for another embodiment of the present invention mainly comprise:
Data processing and communication controller (or PC controller), loop switching device shifter, supervision standard scale, auxiliary electric power supply, measurement loop Input terminal block etc.
Data processing and communication controller (monitor controller is adopted in friendship): transformer station's pick-up unit control core.Mainly contain the function of five aspects:
1, the control loop switching device shifter carries out gating to transformer secondary circuit;
2, control supervision standard scale is measured the loop of gating;
3, obtain the measurement data of AC sampling and measuring device by remote station;
4, handle AC sampling and measuring device and monitor the measurement data of standard scale and obtain Real-time Error;
5, be responsible for the operation or the request of data of Long-distance Control server.
Loop switching device shifter: comprise ' current return handover module ' and ' voltage circuit handover module ', the technology that two-stage is switched, realize at most having adopted secondary to realize multiloop control is nursed one's health multiloop voltage, the current signal of input to the switching of multivoltage, electric current, guarantee that each state only has the voltage and the electric current output of same circuit, accept the control of loop switching signal, test channel is switched.The current return handover module has used the assurance loop technology of not opening a way, and the voltage circuit handover module has used voltage short-circuit protection technology.
Monitor standard scale: provide the pin-point accuracy level other test charge value, mainly comprise electrical measurements such as voltage, electric current, phase place, power, frequency.
In the above-described embodiments, hand over the control function of adopting monitor controller to be:
1. the North China net accent that is in harmonious proportion can be controlled remote station (AC sampling and measuring device) respectively and adopt monitor controller by friendship and control online Real-time Error monitor controller;
2. remote station (AC sampling and measuring device) is accepted the net accent order of mediation North China, ground and can be transmitted data to it;
3. AC sampling and measuring device online in real time error monitoring control device is accepted the net accent order of mediation North China, ground and can be transmitted data to it;
4. AC sampling and measuring device online in real time error monitoring control device can automatic control be finished the verification of line Real-time Error and be in harmonious proportion North China net accent with uploading the data to;
5. AC sampling and measuring device online in real time error monitoring control device is after accent or operator's verify error task are netted in accent or North China with receiving, 1.. send switching command to electric current, voltage switching device, electric current, voltage switching device are connected by the electric current of checking circuit, voltage circuit by order request, and standard scale will be somebody's turn to do the data comparing unit of being delivered to AC sampling and measuring device online in real time error monitoring control device by the data of checking circuit through collection, calculating, data processing; 2.. open to hand over and accept and believe breath processing controls door, make the data comparing unit of being delivered to AC sampling and measuring device online in real time error monitoring control device by the checking circuit data through processing of AC sampling and measuring device; 3.. will be 1. 2. data through relatively, calculate the error checking of finishing this loop, and can be in harmonious proportion North China with delivering to and net accent.
The beneficial effect that the above embodiment of the present invention is brought is: can solve at present and can not test in the problem that is delivering stream sampling and measuring device error effectively, in good time; Set up AC sampling and measuring device timescale data system; Need not have a power failure, reduce power failure experiment work amount and safeguard (need not apply for transmission or not); Greatly reduce conventional verification workload, increase work efficiency; Reduce maintenance cost (the going on business of personnel, traffic etc.); Realize that metering outfit detects from the artificial on-the-spot mode of tradition to detecting transformation automatically, raising system power supply reliability, raising plant maintenance efficient; Reduce a large amount of execute-in-places, improved security, the stability of system's operation, guaranteed economy, the reliability of operation of power networks; Improved the electricity quality of using of power consumer.
After the present invention applies, can set up all transformer station's calibration equipments of North China and even nationwide integrated power grid 220kV, 550kV, can replace existing desk checking mode, increase work efficiency, reduce labor intensity, realize in time holding the operation conditions of AC sampling and measuring device, the aid decision making of trend analysis, early warning and control is provided for the administration of power networks personnel.Guarantee that the AC sampling measurement must bring considerable economic interests to electrical network accurately and reliably.Along with the raising and the application of technology are ripe, can further be generalized to 110kV, 35kV system and generating plant.
Above-described embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above only is the specific embodiment of the present invention; and be not intended to limit the scope of the invention; within the spirit and principles in the present invention all, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Above-described embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above only is the specific embodiment of the present invention; and be not intended to limit the scope of the invention; within the spirit and principles in the present invention all, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the data calibration device of an AC sampling and measuring device is characterized in that, described device comprises:
The measurement data acquiring unit is connected in described AC sampling and measuring device, is used to obtain the electrical measurement data of this AC sampling and measuring device;
The normal data acquiring unit is connected in the same loop of described AC sampling and measuring device, is used to obtain the standard electric measurement data in this loop;
The error comparing unit is used for more described electrical measurement data and standard electric measurement data, obtains the electrical measurement comparing data.
2. the data calibration device of AC sampling and measuring device according to claim 1 is characterized in that, described device also comprises:
The loop switch unit is connected to the loop and the described normal data acquiring unit of a plurality of AC sampling and measuring devices, is used for switching standards data capture unit and being connected by the loop of verification AC sampling and measuring device.
3. the data calibration device of AC sampling and measuring device according to claim 1 is characterized in that, described device also comprises:
Alarm unit is used for storing relatively alert data, and gives the alarm during greater than described relatively alert data in described electrical measurement comparing data.
4. the data calibration device of AC sampling and measuring device according to claim 2 is characterized in that, described loop switch unit comprises:
The current return switch unit is used to make the current return of described normal data acquiring unit to be connected in series to by the current return of verification AC sampling and measuring device;
The voltage circuit switch unit is used to make the voltage circuit of described normal data acquiring unit and links by the voltage circuit of verification AC sampling and measuring device.
5. the data calibration device of AC sampling and measuring device according to claim 4 is characterized in that, described current return switch unit also comprises: open-circuit-protection unit and open circuit alarm unit;
Wherein, described open-circuit-protection unit is used for sending the open circuit alerting signal to described open circuit alarm unit when the generation of protected loop is opened a way, and this open circuit alarm unit gives the alarm according to described open circuit alerting signal.
6. the data calibration device of AC sampling and measuring device according to claim 4 is characterized in that, described voltage circuit switch unit comprises: short-circuit protection unit and short-circuit alarming unit,
Wherein, protect this loop when described short-circuit protection unit is used for being short-circuited in protected loop and send the short-circuit alarming signal to described short-circuit alarming unit, described short-circuit alarming unit gives the alarm according to described short-circuit alarming signal.
7. the data calibration device of AC sampling and measuring device according to claim 1 is characterized in that, described electrical measurement data and standard electric measurement data comprise:
Magnitude of voltage, current value, phase value, performance number and frequency values.
8. the data verification method of an AC sampling and measuring device is characterized in that, described method comprises:
Obtain the electrical measurement data of AC sampling and measuring device;
Obtain the standard electric measurement data in this same loop of AC sampling and measuring device;
More described electrical measurement data and standard electric measurement data obtain the electrical measurement comparing data.
9. method according to claim 8 is characterized in that, described method also comprises:
Switch described normal data acquiring unit and being connected by the loop of verification AC sampling and measuring device.
10. method according to claim 8 is characterized in that, described method also comprises:
Give the alarm during in described electrical measurement comparing data greater than described relatively alert data.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910081412A CN101852844A (en) | 2009-04-03 | 2009-04-03 | Data calibration device of AC sampling and measuring device and method thereof |
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| CN200910081412A CN101852844A (en) | 2009-04-03 | 2009-04-03 | Data calibration device of AC sampling and measuring device and method thereof |
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| CN102105011A (en) * | 2010-11-29 | 2011-06-22 | 重庆多邦科技发展有限公司 | Monitoring method and monitoring center for energy-saving terminal of street lamp |
| CN102568939A (en) * | 2010-12-15 | 2012-07-11 | 浙江天正电气股份有限公司 | Automatic calibration method of circuit breaker |
| CN104330757A (en) * | 2014-10-17 | 2015-02-04 | 国家电网公司 | Method for improving on-line calibration accuracy of AC sampling device |
| CN106199306A (en) * | 2016-07-01 | 2016-12-07 | 中国电力科学研究院 | A kind of system and method for loop state monitoring device is tested |
| CN108919157A (en) * | 2018-07-10 | 2018-11-30 | 中国人民解放军战略支援部队航天工程大学 | A kind of Real-time Alarm method and apparatus of comparatron operating condition |
| CN113834986A (en) * | 2021-09-02 | 2021-12-24 | 上汽通用五菱汽车股份有限公司 | Method for measuring electric signal error proofing, measuring equipment and readable storage medium |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102105011A (en) * | 2010-11-29 | 2011-06-22 | 重庆多邦科技发展有限公司 | Monitoring method and monitoring center for energy-saving terminal of street lamp |
| CN102105011B (en) * | 2010-11-29 | 2013-10-23 | 重庆多邦科技发展有限公司 | Monitoring method and monitoring center for energy-saving terminal of street lamp |
| CN102568939A (en) * | 2010-12-15 | 2012-07-11 | 浙江天正电气股份有限公司 | Automatic calibration method of circuit breaker |
| CN104330757A (en) * | 2014-10-17 | 2015-02-04 | 国家电网公司 | Method for improving on-line calibration accuracy of AC sampling device |
| CN104330757B (en) * | 2014-10-17 | 2017-01-18 | 国家电网公司 | Method for improving on-line calibration accuracy of AC sampling device |
| CN106199306A (en) * | 2016-07-01 | 2016-12-07 | 中国电力科学研究院 | A kind of system and method for loop state monitoring device is tested |
| CN108919157A (en) * | 2018-07-10 | 2018-11-30 | 中国人民解放军战略支援部队航天工程大学 | A kind of Real-time Alarm method and apparatus of comparatron operating condition |
| CN113834986A (en) * | 2021-09-02 | 2021-12-24 | 上汽通用五菱汽车股份有限公司 | Method for measuring electric signal error proofing, measuring equipment and readable storage medium |
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Application publication date: 20101006 |