CN111338319A - Intelligent detector for power grid frequency and voltage emergency control device - Google Patents
Intelligent detector for power grid frequency and voltage emergency control device Download PDFInfo
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- CN111338319A CN111338319A CN202010163530.3A CN202010163530A CN111338319A CN 111338319 A CN111338319 A CN 111338319A CN 202010163530 A CN202010163530 A CN 202010163530A CN 111338319 A CN111338319 A CN 111338319A
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- emergency control
- control device
- voltage emergency
- intelligent detector
- frequency
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0218—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterised by the fault detection method dealing with either existing or incipient faults
- G05B23/0221—Preprocessing measurements, e.g. data collection rate adjustment; Standardization of measurements; Time series or signal analysis, e.g. frequency analysis or wavelets; Trustworthiness of measurements; Indexes therefor; Measurements using easily measured parameters to estimate parameters difficult to measure; Virtual sensor creation; De-noising; Sensor fusion; Unconventional preprocessing inherently present in specific fault detection methods like PCA-based methods
Abstract
The invention discloses an intelligent detector for a frequency and voltage emergency control device of a power grid, which consists of an IO control acquisition module, an analog output module, a communication terminal module and a built-in computer, can be matched with test interfaces of frequency and voltage emergency control devices of multiple manufacturers to manually or automatically complete various classification detections, and can also realize full-automatic detection of all detection items by one key. The invention integrates all logic and performance detection items, and quickly and intelligently realizes the detection of the comprehensive performance and logic of the frequency-voltage emergency control device.
Description
Technical Field
The invention relates to an intelligent detector for a power grid frequency and voltage emergency control device, which is used for carrying out various logic and performance detections on the power grid frequency and voltage emergency control device and belongs to the field of relay protection maintenance.
Background
The national power grid has been built into an 'eight-AC-ten-DC' extra-high voltage transmission project in an accumulated way, and a 'large-DC weak receiving end' has obvious characteristics and outstanding frequency and voltage stability problems. Therefore, each transformer substation of the Jiangsu power grid is provided with a frequency and voltage emergency control device, once the system has low frequency and low voltage, the load is cut off in a targeted manner, the recovery of frequency and voltage problems is accelerated, and the safety and stability of the Jiangsu power grid are facilitated. In great power failure accidents of '2019.8.9' in England, low-frequency load shedding plays an important role, and the recovery of a power grid is accelerated, which gives good inspiration to the power grid of Jiangsu: three defense lines of low-frequency load shedding and other systems are important guarantees for safety and stability of a large power grid. According to the inspiration analysis suggestion: the annual low-frequency low-voltage load reduction distribution scheme adjustment and actual measurement of the Jiangsu power grid and the annual calibration work of the device are finished with high quality.
The dispatching department attaches more and more importance to the detection work of the frequency and voltage emergency control device, requires that each city and county power supply bureau carries out annual inspection work of the frequency and voltage emergency control device, and the work is heavier, and needs to have a relatively intelligent detection means to finish the detection work.
The frequency and voltage emergency control device tester is developed by manufacturers of the frequency and voltage emergency control device during factory tests, but products of different manufacturers cannot be mutually used, the frequency and voltage emergency control device tester is simple in function, generally only has a signal sending function, needs to carry out tests item by item, is long in test time and low in detection efficiency, and does not have the function of intelligent tests.
In summary, it is necessary to develop an intelligent detection device for a frequency-voltage emergency control device, integrate all logic and performance detection items, and quickly and intelligently detect the overall performance, logic and actions of the frequency-voltage emergency control device.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides an intelligent detector for a frequency and voltage emergency control device, which can be matched with power grid frequency and voltage emergency control devices produced by different manufacturers to detect various logics and performances.
In order to solve the problems, the technical scheme adopted by the invention is as follows: an intelligent detector for a frequency-voltage emergency control device comprises an IO control acquisition module, an analog output module, a communication terminal module and a built-in computer. The device can be matched with test interfaces of frequency and voltage emergency control devices of multiple manufacturers, can manually or automatically complete various classification detections without a computer, or can realize full-automatic detection of all detection items by one key, and can also realize manual and automatic classification detection functions by upper computer software in a built-in computer.
The IO control acquisition module can realize the hardware connection of the intelligent detector and the voltage frequency emergency control device, and is used for monitoring the actual action state of the tested equipment in real time.
The communication terminal module can be connected with external communication hardware of the frequency-voltage emergency control device produced by different manufacturers and the intelligent detector is connected with a built-in computer through different communication interfaces.
The analog quantity output can output voltage and current analog quantities of a four-phase (0-125V) voltage source and a three-phase (0-30A) current source.
Wherein, the built-in computer carries the software of an upper computer.
The upper computer software can realize the communication connection between the upper computer and the voltage frequency emergency control device by selecting different communication protocols so as to complete the test work of the detector on the control device.
The upper computer software can be in communication connection with the detector to control the output states of the analog quantity.
The upper computer software can realize different protection logics of the frequency-voltage emergency control devices of different manufacturers through the editable logic function.
The upper computer software can automatically generate a whole set of test data and a report through action information returned by the frequency-voltage emergency control device and the state of the tester.
The invention has the following advantages and effects: the invention can be matched with the test interfaces of the frequency-voltage emergency control devices of multiple manufacturers, integrates all logic and performance detection items of the frequency-voltage emergency control devices, quickly and intelligently realizes the detection of the comprehensive performance, logic and action of the control devices, has simple operation, comprehensive detection, high speed and intellectualization, can be popularized and applied in power supply companies in all cities and counties of the power grid in Jiangsu province, and can improve the running stability of the power grid in Jiangsu province.
Drawings
Fig. 1 is a schematic structural diagram of an intelligent detector.
Detailed Description
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the intelligent detector for the frequency-voltage emergency control device in this embodiment is composed of an IO control acquisition module, an analog output module, a communication terminal module, and a built-in computer, and can be matched with a test interface of a frequency-voltage emergency control device of multiple manufacturers to complete the logical performance detection of the frequency-voltage emergency control device for low-frequency load shedding, low-voltage load shedding, frequency change rate load shedding, voltage change rate load shedding, a locking device, and multi-round switching, and to provide a performance detection report.
In this example, the external communication hardware of the frequency voltage emergency control device produced by different manufacturers can be connected through different communication interfaces.
In this example, the actual action state of the device to be tested can be monitored in real time by connecting the IO control acquisition terminal with the frequency-voltage emergency control device through hardware.
In this example, the communication connection between the upper computer software in the built-in computer of the intelligent detector and the frequency and voltage emergency control device can be realized by selecting different communication protocols.
In the embodiment, the software of the built-in computer upper computer is in communication connection with the detector to control different output states of the analog quantity.
In this example, after the intelligent detector is in communication connection with the frequency-voltage control device, different protection logics of the frequency-voltage emergency control device of different manufacturers can be realized through the editable logic function of the upper computer software in the built-in computer.
In this embodiment, different frequency values, voltage values, frequency change rates and voltage change rates can be set by the built-in computer, and after the computer is started, whether the action is performed or not and whether the action logic is consistent with the set logic or not are determined, so that the manual low-frequency load shedding logic performance detection, the low-voltage load shedding logic performance detection, the frequency change rate load shedding logic performance detection and the voltage change rate load shedding logic performance detection are respectively realized.
In this example, the built-in computer can give signals with locking function such as simulation short-circuit fault, frequency voltage abnormal condition, PT disconnection, etc., and see whether the locking function is abnormal, so as to realize the logic performance detection of the manual locking device.
In the embodiment, the settings of different basic wheels, logic wheels and accelerating wheels can be changed through a built-in computer, and the action logic is detected by utilizing the low-frequency and low-voltage functions, so that the detection of the logic performance of manual multi-wheel switching is realized.
In this example, after setting a plurality of rounds of fixed values respectively by the built-in computer, all low-frequency load shedding detection, low-voltage load shedding detection, frequency change rate load shedding detection and voltage change rate load shedding detection can be realized by one key.
In this example, all of the low frequency load shedding detection, the low voltage load shedding detection, the frequency change rate load shedding detection, the voltage change rate load shedding detection, the latch function performance detection, and the loop test can be completed by a full-automatic one-key.
In this example, the upper computer software in the built-in computer can automatically generate the whole set of test data and test report through the action information returned by the frequency-voltage emergency control device and the state of the intelligent detector.
The above is only one embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a grid frequency voltage emergency control device intelligent detector which characterized in that: all logic and performance detection items are integrated, and the comprehensive performance and logic detection of the frequency and voltage emergency control device is realized rapidly and intelligently; the intelligent detector comprises the following modules:
IO control acquisition module: the intelligent detector is connected with the frequency-voltage emergency control device through the input-output hardware;
a communication terminal module: the connection with external communication hardware of the frequency and voltage emergency control device and the communication connection between the intelligent detector and a built-in computer can be realized through different communication interfaces;
an analog quantity output module: outputting the analog quantity of the voltage and the current;
a built-in computer module: the automatic classification test system can complete the operations of a manual classification test function, an automatic classification test function and a full-automatic test function, is in communication connection with the detector and automatically outputs reports.
2. The intelligent detector of claim 1 for the grid frequency voltage emergency control device, wherein: the instrument interface can be automatically matched with the test interfaces of the frequency and voltage emergency control devices of multiple manufacturers, and the control devices produced by different manufacturers can be detected.
3. The intelligent detector of claim 1 for the grid frequency voltage emergency control device, wherein: the voltage and current analog quantity output of a four-phase (0-125V) voltage source and a three-phase (0-30A) current source is realized.
4. The intelligent detector of claim 1 for the grid frequency voltage emergency control device, wherein: the built-in computer in the detector carries the software of an upper computer.
5. The intelligent detector of claim 1 for the grid frequency voltage emergency control device, wherein: and the upper computer software realizes the communication connection between the upper computer and the emergency control devices with different frequencies by selecting different communication protocols.
6. The intelligent detector of claim 1 for the grid frequency voltage emergency control device, wherein: the manual and automatic classification detection of all detection items can be finished without a built-in computer.
7. The intelligent detector of claim 1 for the grid frequency voltage emergency control device, wherein: several locking conditions can be automatically given, and one key can realize the performance detection of all locking functions.
8. The intelligent detector of claim 1 for the grid frequency voltage emergency control device, wherein: the manual classification detection function and the automatic classification detection function of the detector can be realized through the operation of a built-in computer.
9. The intelligent detector of claim 1 for the grid frequency voltage emergency control device, wherein: the action message information of the frequency and voltage emergency control device can be read through the upper computer software in the built-in computer, and the automatic matching of action logic and message information is realized.
10. The intelligent detector of claim 1 for the grid frequency voltage emergency control device, wherein: and after all manual or automatic detections are finished, a performance detection report can be automatically output through upper computer software in a built-in computer.
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| CN202010163530.3A CN111338319A (en) | 2020-03-10 | 2020-03-10 | Intelligent detector for power grid frequency and voltage emergency control device |
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| CN202010163530.3A CN111338319A (en) | 2020-03-10 | 2020-03-10 | Intelligent detector for power grid frequency and voltage emergency control device |
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2020
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| JPS5552104A (en) * | 1978-10-09 | 1980-04-16 | Toyoda Mach Works Ltd | Malfunction detector for servo mechanism |
| CN202018484U (en) * | 2011-01-11 | 2011-10-26 | 华北电力科学研究院有限责任公司 | Detecting system for safety equipment of power system |
| CN104246521A (en) * | 2013-03-29 | 2014-12-24 | 国家电网公司 | Method and device for automatic test of relay protection function of intelligent susbstation |
| CN203287453U (en) * | 2013-06-05 | 2013-11-13 | 国家电网公司 | Outlet logic testing box for low-frequency-low-voltage load shedding equipment |
| CN207215915U (en) * | 2017-08-04 | 2018-04-10 | 华南理工大学 | Power system low-voltage load sheding device closed loop test system |
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