CN107167755B - Control system and control method for field error verification of large-current transformer - Google Patents
Control system and control method for field error verification of large-current transformer Download PDFInfo
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- CN107167755B CN107167755B CN201710399872.3A CN201710399872A CN107167755B CN 107167755 B CN107167755 B CN 107167755B CN 201710399872 A CN201710399872 A CN 201710399872A CN 107167755 B CN107167755 B CN 107167755B
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
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Abstract
The invention discloses a control system and a control method for field error verification of a large-current transformer. The existing control system for the field error check of the large-current transformer is mostly complex, the safety is low, and the working efficiency is also low. The current transformer on-site verification system and the test environment monitoring system in the control system are connected with an integrated operating system, and the integrated operating system comprises an integrated operating table top and a man-machine interaction large screen embedded on the integrated operating table top; selecting a current test, and selectively starting an electronic power supply or an electrical power supply on an integrated operation table according to test requirements; the integrated operating system automatically calculates primary parameters and required compensation capacity of the check loop, and controls the switching capacity compensation device to compensate; the integrated operating system starts automatic up-flow verification and generates a test report. The system has the advantages of high working efficiency, safety, stability and high verification accuracy.
Description
Technical Field
The invention relates to the field of error checking of power equipment, in particular to a control system and a control method for field error checking of a large-current transformer.
Background
Because large-scale production and exchange of electric energy in an electric power system involve great economic benefits of various departments, electric quantity charging settlement is required between a power plant and a power grid, between networking lines and between the power grid and a large user, and accuracy and reliability of a high-voltage electric energy metering device also become focus problems of concern in various aspects. The electric energy metering device consists of a high-voltage current, a voltage transformer, an electric energy meter and a secondary circuit. The current transformers and the voltage transformers are power equipment which is used for carrying out functions of measurement, metering, protection and the like in a power system, and are large in quantity and large in influence on safe and economic operation of a power grid. In order to ensure that the transformer device is in good condition, it is necessary to ensure that the measurement error meets its accuracy level, in addition to its reliable insulation, its accuracy directly affects the fairness and fairness of the electric market. According to the national metering verification regulations of JJG1021-2007 electric transformer, besides the primary verification, the transformer should be periodically subjected to field verification and traced to the national standard to ensure the accuracy.
The existing large-current transformer on-site verification device is generally of a separated structure, the test equipment is large in size, heavy in weight and scattered in equipment, the workload of transporting and constructing a test system is large, and frequent loading, unloading and hoisting are easy to cause certain damage to the test equipment; moreover, the test wiring workload is large and complex, the working efficiency is low, and the requirement on test personnel is high; the test has lower automation degree. Therefore, the existing control system for the field error check of the large-current transformer is mostly complex, the safety is low, and the working efficiency is also low.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects in the prior art, and provide a safe and stable control system for field error verification of a large current transformer so as to improve the working efficiency and the verification accuracy.
Therefore, the invention adopts the following technical scheme: the control system for the field error check of the large current transformer comprises a field check system of the current transformer, an integrated operating system and a test environment monitoring system, wherein the field check system of the current transformer and the test environment monitoring system are connected with the integrated operating system, and the integrated operating system comprises an integrated operating table top and a man-machine interaction large screen embedded on the integrated operating table top;
the current transformer on-site verification system comprises a control power supply, a capacitive compensation device, a current transformer and a current transformer difference measurement verification system, wherein the current transformer on-site verification system is used for on-site error verification of the current transformer, the control power supply is connected with the capacitive compensation device, the capacitive compensation device is connected with the current transformer in parallel, and the current transformer difference measurement verification system is used for current transformer difference measurement verification of the tested current transformer;
the integrated operating system is used for controlling monitoring signals of the current transformer on-site verification system and the monitoring test environment monitoring system;
the test environment monitoring system is used for monitoring the temperature and the humidity of a test site.
On the basis of the technical scheme, the control system further comprises an audible and visual alarm system, the audible and visual alarm system comprises a warning lamp arranged at the top of the mobile laboratory, and a control line of the audible and visual alarm system is connected with an integrated operation table top of the integrated operation system.
On the basis of the technical scheme, the audible and visual alarm system further comprises an alarm bell arranged on the outer side face of the mobile laboratory.
On the basis of the technical scheme, the test environment monitoring system monitors the temperature and the humidity of a test site through the temperature and humidity monitoring device, and the temperature and humidity signals of the humidity monitoring device are transmitted to the human-computer interaction large screen.
On the basis of the technical scheme, the current transformer difference measurement verification system comprises a standard current transformer, a current load box, an intelligent transformer calibrator and an error interference test unit, wherein the output end of the current booster is connected with the standard current transformer through a high-current wire, the intelligent transformer calibrator is connected with a human-computer interaction large screen, and the error interference test unit is connected with the intelligent transformer calibrator.
On the basis of the technical scheme, the capacitive compensation device is connected with an integrated operation table top of the integrated operation system, and compensation control is carried out through a compensation control button of the integrated operation table top, so that the optimal compensation effect of test requirements is achieved.
On the basis of the technical scheme, the control power supply comprises an electronic power supply and an electrical power supply, the electronic power supply or the electrical power supply is selectively turned on the integrated operation table top according to test requirements, and output ends of the electronic power supply and the electrical power supply are connected with the capacitive compensation device.
On the basis of the technical scheme, the electronic power supply and the electrical power supply are adjusted on the integrated operation table top through the main adjusting knob and the fine adjusting knob, so that the current is convenient to accurately position, and the electrical power supply is convenient to quickly position by switching the adjusting direction of the electrical power supply fine adjusting voltage regulator on the integrated operation table top through the positive and negative phase adjusting knob.
The invention also provides a control method of the large-current transformer field error checking control system, which comprises the following steps:
A. after the wiring of the current transformer on-site verification system is finished, connecting a transformer substation power supply, and opening a power switch of an integrated operation table top of the integrated operation system;
B. observing temperature and humidity signals on a man-machine interaction large screen of an integrated operating system, and preparing a test if the test environment meets the requirement;
C. selecting a current test, and selectively starting an electronic power supply or an electrical power supply on an integrated operation table according to test requirements;
D. the integrated operating system automatically calculates primary parameters and required compensation capacity of the check loop, and controls the switching capacity compensation device to compensate;
E. the integrated operating system starts automatic up-flow verification and generates a test report.
On the basis of the technical scheme, the method further comprises the following steps after the step D: the error interference testing unit is adjusted to a testing state, after the current booster is boosted to 120% of rated current through the integrated operating system, the current of the current booster is reduced to 0, error signals on a man-machine interaction large screen are observed in the process, if the error is within 1/20 of the error limit value of the tested current transformer, the error interference testing unit is adjusted to a testing state to continue testing, and the step E is shifted; if the error exceeds 1/20 of the error limit of the tested current transformer, the test is terminated.
Compared with the prior art, the invention has the following beneficial effects: the invention is used for the field error verification of the large-current transformer, and an operator can complete all verification work through the control system only after simple wiring outside a laboratory, so that the working efficiency is improved; meanwhile, the error interference testing unit can measure the error interference quantity, and improves the accuracy of test data; the operators are isolated from the high-voltage test part, so that the personal safety of the operators is ensured; the site monitoring and alarming system is arranged, so that the safety of the test is ensured; the whole movement detection platform has no hydraulic mechanical movement mechanism, and is safe and reliable.
Drawings
FIG. 1 is a block diagram of a control system for field error checking of a high current transformer in accordance with an embodiment of the present invention;
FIG. 2 is a control schematic block diagram of an integrated operating system according to an embodiment of the present invention;
fig. 3 is a flowchart of a control method of a field error checking control system of a high-current transformer according to an embodiment of the invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and specific examples.
Example 1
Referring to fig. 1 and 2, the embodiment of the invention provides a control system for field error verification of a large current transformer, which comprises a current transformer field verification system, an integrated operating system, a test environment monitoring system and an audible and visual alarm system, wherein the current transformer field verification system and the test environment monitoring system are both connected with the integrated operating system, and the integrated operating system comprises an integrated operating table top and a man-machine interaction large screen embedded on the integrated operating table top;
the current transformer on-site verification system comprises a control power supply, a capacitive compensation device, a current transformer and a current transformer difference measurement verification system, wherein the current transformer on-site verification system is used for on-site error verification of the current transformer, the control power supply is connected with the capacitive compensation device, the capacitive compensation device is connected with the current transformer in parallel, and the current transformer difference measurement verification system is used for current transformer difference measurement verification of the tested current transformer; the integrated operating system is used for controlling monitoring signals of the current transformer on-site verification system and the monitoring test environment monitoring system;
the test environment monitoring system is used for monitoring the temperature and the humidity of a test site.
The audible and visual alarm system comprises a warning lamp arranged at the top of the mobile laboratory and a warning bell arranged on the outer side face of the mobile laboratory, and a control line of the audible and visual alarm system is connected with an integrated operating table top of the integrated operating system. The test environment monitoring system monitors the temperature and the humidity of a test site through the temperature and humidity monitoring device, and the temperature and humidity signals of the humidity monitoring device are transmitted to the human-computer interaction large screen.
The current transformer difference measurement verification system comprises a standard current transformer, a current load box, an intelligent transformer calibrator and an error interference test unit, wherein the output end of the current booster is connected with the standard current transformer through a high-current lead, and the intelligent transformer calibrator is connected with a man-machine interaction large screen. The capacitive compensation device is connected with an integrated operation table top of the integrated operation system, compensation control is carried out through a compensation control button of the integrated operation table top, the best compensation effect of test requirements is achieved, and the error interference test unit is connected with a differential flow signal input end of the intelligent transformer calibrator.
In this embodiment, the control power supply includes an electronic power supply and an electrical power supply, and the electronic power supply or the electrical power supply is selectively turned on the integrated operation table according to the test requirement, and output ends of the electronic power supply and the electrical power supply are connected with the capacitive compensation device. The electronic power supply and the electrician power supply are adjusted on the integrated operation table top through the main adjusting knob and the fine adjusting knob, so that the accurate positioning of current is facilitated, and the electrician power supply is used for switching the adjusting direction of the electrician power supply fine adjusting voltage regulator on the integrated operation table top through the positive and negative phase adjusting knob, so that the quick positioning of current is facilitated.
Example 2
Referring to fig. 3, the invention further provides a control method of the field error checking control system of the large current transformer according to embodiment 1, comprising the following steps:
s1, connecting a transformer substation power supply after wiring of a current transformer on-site verification system is completed, and opening a power switch of an integrated operation table board of an integrated operation system; closing a warning lamp switch to show that the power supply is on; pressing an alarm bell to show that the test starts;
s2, observing temperature and humidity signals on a man-machine interaction large screen of the integrated operating system, and preparing a test if the test environment meets the requirements;
s3, selecting a current test, and selectively starting an electronic power supply or an electrical power supply on the integrated operation table according to test requirements;
s4, the integrated operating system automatically calculates primary parameters and required compensation capacity of the check loop, and controls the switching capacity compensation device to compensate;
s5, adjusting the error interference testing unit to a testing state, and after the current booster is boosted to 120% of rated current through the integrated operating system, reducing the current of the current booster to 0, and observing an error signal on a human-computer interaction large screen in the process; if the error is within 1/20 of the error limit value of the tested current transformer, adjusting the error interference testing unit to a testing state to continue testing, and turning to step S6; if the error exceeds 1/20 of the error limit value of the tested current transformer, terminating the test;
s6, the integrated operating system starts automatic up-flow verification and generates a test report.
The error limit value is determined according to the accuracy level of the tested current transformer. In practical application, the error interference test unit can be provided with two gears, namely a test gear and a test gear, when the test gear is in a state, the differential flow signal cannot enter the intelligent transformer calibrator, and when the test gear is in a state, the differential flow signal normally enters the intelligent transformer calibrator.
Various modifications and variations of the embodiments of the present invention may be made by those skilled in the art, and are within the scope of the appended claims and their equivalents.
What is not described in detail in the specification is prior art known to those skilled in the art.
Claims (8)
1. The control method of the field error checking control system of the large current transformer is characterized by comprising the following steps of: the large-current transformer field error checking control system comprises a current transformer field checking system, an integrated operating system and a test environment monitoring system, wherein the current transformer field checking system and the test environment monitoring system are connected with the integrated operating system, and the integrated operating system comprises an integrated operating table top and a man-machine interaction large screen embedded on the integrated operating table top;
the current transformer on-site verification system comprises a control power supply, a capacitive compensation device, a current transformer and a current transformer difference measurement verification system, wherein the current transformer on-site verification system is used for on-site error verification of the current transformer, the control power supply is connected with the capacitive compensation device, the capacitive compensation device is connected with the current transformer in parallel, and the current transformer difference measurement verification system is used for current transformer difference measurement verification of the tested current transformer;
the integrated operating system is used for controlling monitoring signals of the current transformer on-site verification system and the monitoring test environment monitoring system;
the test environment monitoring system is used for monitoring the temperature and the humidity of a test site;
the control method of the field error checking control system of the large current transformer comprises the following steps:
A. after the wiring of the current transformer on-site verification system is finished, connecting a transformer substation power supply, and opening a power switch of an integrated operation table top of the integrated operation system;
B. observing temperature and humidity signals on a man-machine interaction large screen of an integrated operating system, and preparing a test if the test environment meets the requirement;
C. selecting a current test, and selectively starting an electronic power supply or an electrical power supply on an integrated operation table according to test requirements;
D. the integrated operating system automatically calculates primary parameters and required compensation capacity of the check loop, and controls the switching capacity compensation device to compensate;
E. the integrated operating system starts automatic up-flow verification and generates a test report;
after step D, the method further comprises the following steps: the error interference testing unit is adjusted to a testing state, after the current booster is boosted to 120% of rated current through the integrated operating system, the current of the current booster is reduced to 0, error signals on a man-machine interaction large screen are observed in the process, if the error is within 1/20 of the error limit value of the tested current transformer, the error interference testing unit is adjusted to a testing state to continue testing, and the step E is shifted; if the error exceeds 1/20 of the error limit of the tested current transformer, the test is terminated.
2. The control method of the field error checking control system of the high-current transformer according to claim 1, wherein: the control system further comprises an audible and visual alarm system, the audible and visual alarm system comprises a warning lamp arranged at the top of the mobile laboratory, and a control line of the audible and visual alarm system is connected with an integrated operation table top of the integrated operation system.
3. The control method of the field error checking control system of the high-current transformer according to claim 2, wherein: the audible and visual alarm system further comprises an alarm bell arranged on the outer side face of the mobile laboratory.
4. The control method of the field error checking control system of the high-current transformer according to claim 1, wherein: the test environment monitoring system monitors the temperature and the humidity of a test site through the temperature and humidity monitoring device, and the temperature and humidity signals of the temperature and humidity monitoring device are transmitted to the human-computer interaction large screen.
5. The control method of the field error checking control system of the high-current transformer according to claim 1, wherein: the current transformer difference measurement verification system comprises a standard current transformer, a current load box, an intelligent transformer calibrator and an error interference test unit, wherein the output end of the current booster is connected with the standard current transformer through a high-current wire, the intelligent transformer calibrator is connected with a man-machine interaction large screen, and the error interference test unit is connected with the intelligent transformer calibrator.
6. The control method of the field error checking control system for the high-current transformer according to claim 5, wherein: the capacitive compensation device is connected with an integrated operation table top of the integrated operation system and performs compensation control through a compensation control button of the integrated operation table top.
7. The control method of the field error checking control system of the high-current transformer according to claim 1, wherein: the control power supply comprises an electronic power supply and an electrical power supply, the electronic power supply or the electrical power supply is selectively turned on the integrated operation table top according to test requirements, and output ends of the electronic power supply and the electrical power supply are connected with the capacitive compensation device.
8. The control method of the field error checking control system for the high-current transformer according to claim 7, wherein: the electronic power supply and the electrician power supply are adjusted on the integrated operation table top through the main adjusting knob and the fine adjusting knob, so that accurate current positioning is facilitated; the electrician power supply is used for switching the adjusting direction of the electrician power supply fine-tuning voltage regulator on the integrated operating table surface through the positive and negative phase adjusting knob, so that the current can be conveniently and rapidly positioned.
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| CN201710399872.3A CN107167755B (en) | 2017-05-31 | 2017-05-31 | Control system and control method for field error verification of large-current transformer |
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| CN201710399872.3A CN107167755B (en) | 2017-05-31 | 2017-05-31 | Control system and control method for field error verification of large-current transformer |
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| CN109521389A (en) * | 2018-12-28 | 2019-03-26 | 武汉磐电科技股份有限公司 | A kind of electronic mutual inductor evaluating platform control system and its implementation |
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