CN112763878A - Converter valve thyristor conduction test method and system based on wireless signal transmission - Google Patents
Converter valve thyristor conduction test method and system based on wireless signal transmission Download PDFInfo
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Abstract
The invention discloses a converter valve thyristor conduction test method and system based on wireless signal transmission, and relates to the technical field of high-voltage direct-current transmission. The conduction test method of the thyristor of the converter valve comprises the following steps: establishing a wireless communication network for wireless transmission between the thyristor conduction tester VET and the VBE screen cabinet; the VBE screen cabinet sends a trigger allowing signal to the VET under the condition that the current test environment meets the standard test environment; after receiving the allowed trigger signal from the VBE screen cabinet, the VET sends the trigger signal to the VBE screen cabinet and times; the VBE screen cabinet receives and executes the trigger signal and feeds a test result return signal back to the VET; and after receiving the test result report signal, the VET stops timing and judges whether the target thyristor is conducted or not according to the timing duration. According to the method, the thyristor conduction test method of the converter valve for wireless signal transmission is designed, so that repeated plugging and unplugging are not needed in the thyristor conduction test process, and the safety and reliability of the overall operation of the high-voltage direct-current transmission system are improved.
Description
Technical Field
The invention belongs to the technical field of high-voltage direct-current power transmission, and particularly relates to a converter valve thyristor conduction test method and system based on wireless signal transmission.
Background
The thyristor is the core equipment for realizing the conversion of alternating current and direct current of electric energy in direct current engineering. According to the regulations, the direct current converter station conducts the thyristor test every year, and whether the thyristor is normal or not and whether the breakdown phenomenon exists or not are judged according to the triggering and returning signals of the thyristor and the resistance loop, so that whether the commissioning condition is met or not is judged. The above tests play a critical role in the stable operation of the direct current system.
The current conduction test method is based on a wired optical fiber form, a test instrument (VTE) sends a trigger signal, the trigger signal is transmitted to a VBE screen cabinet through a test optical fiber, the VBE screen cabinet triggers the trigger signal, and a worker observes relevant information and messages in the background. When the valve group is replaced, the testing optical fiber needs to be replaced on the VBE screen cabinet and the valve tower at the same time, and the damage rate of the testing optical fiber is increased year by year due to frequent plugging and unplugging of the optical fiber. After the optical fiber is damaged, the corresponding valve tower cannot be tested, and the damaged optical fiber is extremely difficult to lay again. In addition, the testing work needs to be carried out by workers at a valve tower, a VBE screen cabinet and a background, so that the overhauling efficiency is severely restricted, and the safe and stable operation of a direct current system is threatened.
Therefore, how to provide a rapid and convenient testing method is a problem that needs to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a method for testing the conduction of a thyristor of a converter valve based on wireless signal transmission, so as to solve the problems of the prior art, such as complicated and complicated detection method, low efficiency, and test damage.
In some illustrative embodiments, the converter valve thyristor conduction test method based on wireless signal transmission is applied to a converter valve thyristor conduction test system, and includes: step 1, establishing a wireless communication network for wireless transmission between a thyristor conduction tester VET and a VBE screen cabinet; step 2, the VBE screen cabinet sends a trigger allowing signal to the thyristor conduction tester VET under the condition that the current test environment meets the standard test environment; step 3, after receiving the trigger allowing signal from the VBE screen cabinet, the thyristor conduction tester VET sends a trigger signal to the VBE screen cabinet and times; the trigger signal is used for indicating the VBE screen cabinet to conduct a conduction test on a target thyristor; step 4, the VBE screen cabinet receives and executes the trigger signal, and feeds back a test result return signal to the thyristor conduction tester VET; step 5, after receiving the test result return signal, the thyristor conduction tester VET stops timing and judges whether the timing duration meets the set threshold range; if yes, judging that the target thyristor is conducted; if not, the target thyristor is judged to be abnormal.
In some optional embodiments, the process of sending the trigger enabling signal to the thyristor conduction tester VET by the VBE panel when the current test environment meets the standard test environment includes: and after receiving a trigger preparation signal from the thyristor conduction tester VET, the VBE screen cabinet judges whether the current test environment meets a standard test environment.
In some optional embodiments, the process of sending the trigger enabling signal to the thyristor conduction tester VET by the VBE panel when the current test environment meets the standard test environment includes: and judging whether the current test environment meets the standard test environment or not according to the voltage parameter and the current parameter of the target thyristor, the mode of the VBE screen cabinet and the grounding state of the valve hall.
In some optional embodiments, the number of the target thyristors is 1 or more.
In some optional embodiments, the target thyristors are a plurality of sequential series structures; when the target thyristor is judged to be abnormal, the target thyristor is divided into two groups of series structures, namely a first abnormal thyristor group to be tested and a second abnormal thyristor group to be tested; the difference between the numbers of thyristors in the first abnormal thyristor group to be tested and the second abnormal thyristor group to be tested is not more than 1; and (5) respectively taking the first abnormal thyristor group to be tested and the second abnormal thyristor group to be tested as the target thyristors, and executing the step 4 and the step 5 until all abnormal thyristors are determined.
In some optional embodiments, the wireless communication network is a bluetooth network, a WIFI network, or a cellular network.
The invention also aims to provide a converter valve thyristor conduction test system based on wireless signal transmission to solve the problems in the prior art.
In some demonstrative embodiments, the wireless signal transmission-based thyristor conduction test system of a converter valve includes: the thyristor conduction tester VET comprises a first wireless communication module; a VBE screen cabinet with a second wireless communication module; and a wireless communication network is established between the thyristor conduction tester VET and the VBE screen cabinet through the first wireless communication module and the second wireless communication module.
In some optional embodiments, the wireless signal transmission-based converter valve thyristor conduction test system further includes: establishing a routing device of the wireless communication network; the thyristor conduction tester VET is connected to the wireless communication network through a first wireless communication module on the thyristor conduction tester VET, and the VBE screen cabinet is connected to the wireless communication network through a second wireless communication module on the VBE screen cabinet.
In some optional embodiments, the wireless signal transmission-based converter valve thyristor conduction test system further includes: the valve hall is provided with at least one group of converter valves; and the VBE screen cabinet is connected with the thyristors on at least one group of converter valves in the valve hall.
In some optional embodiments, the first wireless communication module and the second wireless communication module are powered by a secondary side of the converter station.
Compared with the prior art, the invention has the following advantages:
according to the method, the thyristor conduction test method of the converter valve for wireless signal transmission is designed, so that repeated plugging and unplugging are not needed in the thyristor conduction test process, and the safety and reliability of the overall operation of the high-voltage direct-current transmission system are improved.
Drawings
Fig. 1 is a flowchart of a converter valve thyristor conduction test method based on wireless signal transmission in an embodiment of the invention;
fig. 2 is a schematic structural diagram of a converter valve thyristor conduction test system based on wireless signal transmission in an embodiment of the present invention.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The scope of embodiments of the invention encompasses the full ambit of the claims, as well as all available equivalents of the claims. Embodiments of the invention may be referred to herein, individually or collectively, by the term "invention" merely for convenience and without intending to voluntarily limit the scope of this application to any single invention or inventive concept if more than one is in fact disclosed.
It should be noted that the technical features in the embodiments of the present invention may be combined with each other without conflict.
At present, converter valves in a converter station are generally arranged in a valve hall for converting three-phase alternating-current voltage into desired direct-current voltage, while thyristors in the converter valves are key components of the converter valves, and the thyristors are often designed in a series structure for obtaining desired system voltage.
The embodiment of the invention discloses a converter valve thyristor conduction test method based on wireless signal transmission, and particularly, as shown in fig. 1, fig. 1 is a flow chart of the converter valve thyristor conduction test method based on wireless signal transmission in the embodiment of the invention. The method for testing the conduction of the thyristor of the converter valve through wireless signal transmission comprises the following steps:
s1, establishing a wireless communication network for wireless transmission between the thyristor conduction tester VET and the VBE screen cabinet;
s2, sending a trigger allowing signal to a thyristor conduction tester VET by the VBE screen cabinet under the condition that the current test environment meets the standard test environment; the allowable trigger signal is used for indicating the thyristor conduction tester VET, and the current testing environment meets the standard testing environment and can receive the trigger signal.
Step S3, after receiving the trigger-allowed signal from the VBE screen cabinet, the thyristor conduction tester VET sends a trigger signal to the VBE screen cabinet and times; the trigger signal is used for indicating the VBE screen cabinet to conduct a conduction test on the target thyristor;
step S4, the VBE screen cabinet receives and executes the trigger signal, and feeds back a test result return signal to the thyristor conduction tester VET;
step S5, after receiving the test result return signal, the thyristor conduction tester VET stops timing and judges whether the timing duration (feedback time) meets the set threshold range; if yes, judging that the target thyristor is conducted; if not, the target thyristor is judged to be abnormal.
The threshold range set in S5 may be set by an operator through experience, or may be calculated by parameters such as a wireless transmission method, a distance, and a switching value passing through the system. Preferably, the feedback time may be 1.5 milliseconds.
According to the method, the thyristor conduction test method of the converter valve for wireless signal transmission is designed, so that repeated plugging and unplugging are not needed in the thyristor conduction test process, and the safety and reliability of the overall operation of the high-voltage direct-current transmission system are improved. Furthermore, the inventor of the application finds that when the thyristor in the normal state is detected, the VBE screen cabinet can feed back the result in a very short time, and when the thyristor in the abnormal state is detected, the VBE screen cabinet can greatly prolong the feedback time and even can not feed back the result. The invention uses the feedback time of the VBE screen cabinet as the judgment basis of the abnormality of the thyristor, thereby not only ensuring the reliability and stability of the test, but also improving the test efficiency, and avoiding the system resources and efficiency occupied by feeding back other system parameters and then carrying out analysis and operation.
In some optional embodiments, the sending, by the VBE panel in step S2, a trigger-allowing signal to the thyristor conduction tester VET when the current test environment meets the standard test environment may include:
and after receiving a trigger preparation signal from the thyristor conduction tester VET, the VBE screen cabinet judges whether the current test environment meets a standard test environment.
The trigger preparation signal may be configured to be automatically sent to the VBE screen cabinet by the thyristor conduction tester VET after a wireless communication network for wireless transmission between the thyristor conduction tester VET and the VBE screen cabinet is established, so as to implement automatic test processing of the detection device. In other embodiments, after the wireless communication network for wireless transmission between the thyristor conduction tester VET and the VBE screen cabinet is established, an operator may actively control the thyristor conduction tester VET to send out to the VBE screen cabinet, so as to avoid false triggering and useless calculation due to the fact that the converter station system does not completely meet the test requirements.
In some optional embodiments, the sending, by the VBE panel in step S2, a trigger-allowing signal to the thyristor conduction tester VET when the current test environment meets the standard test environment may include:
and judging whether the current test environment meets the standard test environment or not according to the voltage parameter and the current parameter of the target thyristor, the mode of the VBE screen cabinet and the grounding state of the valve hall.
A standard test environment comprising:
the voltage parameter of the target thyristor should be in accordance with its normal voltage;
the current parameter of the target thyristor should be 0;
the mode of the VBE screen cabinet is a test mode;
the valve hall should be grounded.
When the current test environment meets the standard test environment, the current test environment is indicated, and various parameter indexes of the target thyristor to be tested meet the test requirements, so that the accuracy and reliability of the test are ensured.
In some embodiments, there may be several environmental conditions/parameters in the current testing environment acquired by the VBE panel in step S2, and the acquired signal time is different, so that the VBE panel is configured to send a trigger-allowing signal to the thyristor turn-on tester VET within the set time (the time when the VBE panel can acquire all the current testing environment). And when the thyristor conduction tester VET does not receive the permission trigger signal in the expected time, a warning signal is sent outwards to indicate an operator to check the current states of the converter valves and the like in the valve hall and the VBE screen cabinet state. Preferably, the set time may be 2 seconds, that is, after the VBE screen cabinet receives the trigger preparation signal, the VBE screen cabinet delays for 2 seconds to send the trigger permission signal to the thyristor conduction tester VET.
Preferably, the number of the target thyristors in the embodiment of the present invention may be 1 or more, and the method for testing the conduction of the thyristor of the converter valve based on wireless signal transmission in the embodiment of the present invention may specifically detect one of the thyristors, or detect each of the thyristors in sequence, or detect a plurality of thyristors at the same time.
When a plurality of thyristors are detected simultaneously, for example, the target thyristor is a plurality of thyristor groups which are sequentially connected in series; taking the whole thyristor group with the series structure as a detection target, after the step S4 and the step S5, if the feedback time meets the set threshold range, determining that the thyristor group is in a normal state, that is, each thyristor is in a normal state; otherwise, if the feedback time does not meet the set threshold range, the thyristor group is judged to be in an abnormal state, and abnormal reporting is carried out, so that system maintenance is required. By using the thyristor group as a detection unit, the overall detection efficiency can be improved, the detection aiming at each independent thyristor originally is improved to the detection aiming at each independent converter valve, the detection time can be reduced, and the converter station can be restored to the working state and put into operation as soon as possible.
Further, under the condition that the whole thyristor group is judged to be abnormal, a specific abnormal thyristor in the thyristor group can be quickly found by utilizing a bisection method, so that the detection efficiency is further improved, and the detection time is shortened.
Specifically, when the target thyristor is judged to be abnormal, the thyristor group is split into two groups of serial structures, namely a first abnormal thyristor group to be tested and a second abnormal thyristor group to be tested; the difference between the numbers of thyristors in the first abnormal thyristor group to be tested and the second abnormal thyristor group to be tested is not more than 1; and (5) respectively taking the first abnormal thyristor group to be tested and the second abnormal thyristor group to be tested as the target thyristors, and executing the step 4 and the step 5 until all abnormal thyristors are determined.
For example: when one of the thyristor groups is failed, the abnormal thyristor can be determined only by repeating the steps S4-S5 for 3 times at most.
The wireless communication network in the embodiment of the present invention may be a bluetooth network, a WIFI network, a cellular network, or other networks capable of performing wireless transmission in the prior art. According to the embodiment of the invention, signal transmission can be carried out between the thyristor conduction tester VET and the VBE screen cabinet through the wireless communication network, so that damage caused by optical fiber plugging and unplugging due to traditional optical fiber transmission is avoided.
The invention also aims to provide a converter valve thyristor conduction test system based on wireless signal transmission, which can be used for realizing the converter valve thyristor conduction test method based on wireless signal transmission so as to solve the problems in the prior art.
Specifically, as shown in fig. 2, the converter valve thyristor conduction test system based on wireless signal transmission is shown in fig. 2, which is a schematic structural diagram of the converter valve thyristor conduction test system based on wireless signal transmission in the embodiment of the present invention. This converter valve thyristor switches on test system based on wireless signal transmission includes: the device comprises a thyristor conduction tester VET1 and a VBE screen cabinet 2, wherein the thyristor conduction tester VET1 is provided with a first wireless communication module 3, and the VBE screen cabinet 2 is provided with a second wireless communication module 4; a wireless communication network is established between the thyristor conduction tester VET1 and the VBE screen cabinet 2 through the first wireless communication module 3 and the second wireless communication module 4.
Wherein, still include: the valve hall is provided with at least one group of converter valves; and the VBE screen cabinet is connected with the thyristors on at least one group of converter valves in the valve hall.
In some optional embodiments, the wireless signal transmission-based converter valve thyristor conduction test system further includes: establishing a routing device of the wireless communication network; the thyristor conduction tester VET is connected to the wireless communication network through a first wireless communication module on the thyristor conduction tester VET, and the VBE screen cabinet is connected to the wireless communication network through a second wireless communication module on the VBE screen cabinet.
In some optional embodiments, the first wireless communication module and the second wireless communication module are powered by a secondary side of the converter station, and convert the acquired analog quantity signal into a digital quantity signal and transmit the digital quantity signal in a wireless manner, so as to ensure reliability in a wireless transmission process. In order to increase the anti-interference capability of wireless transmission, a long-wave signal is adopted in a wireless transmission mode. The VTE and VBE devices have wireless transceiving functions, can modulate and send trigger instructions which need to be generated remotely, receive and demodulate the trigger instructions at a VBE end, and compensate time delay of transmission signals, so that the measuring accuracy is ensured.
Those of skill would further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.
Claims (10)
1. A converter valve thyristor conduction test method based on wireless signal transmission is characterized by being applied to a converter valve thyristor conduction test system and comprising the following steps:
step 1, establishing a wireless communication network for wireless transmission between a thyristor conduction tester VET and a VBE screen cabinet;
step 2, the VBE screen cabinet sends a trigger allowing signal to the thyristor conduction tester VET under the condition that the current test environment meets the standard test environment;
step 3, after receiving the trigger allowing signal from the VBE screen cabinet, the thyristor conduction tester VET sends a trigger signal to the VBE screen cabinet and times; the trigger signal is used for indicating the VBE screen cabinet to conduct a conduction test on a target thyristor;
step 4, the VBE screen cabinet receives and executes the trigger signal, and feeds back a test result return signal to the thyristor conduction tester VET;
step 5, after receiving the test result return signal, the thyristor conduction tester VET stops timing and judges whether the timing duration meets the set threshold range; if yes, judging that the target thyristor is conducted; if not, the target thyristor is judged to be abnormal.
2. The method for testing the conduction of the thyristor of the converter valve based on the wireless signal transmission of claim 1, wherein the VBE panel cabinet sends a trigger-allowing signal to the thyristor conduction tester VET when the current testing environment meets the standard testing environment, and the method comprises the following steps:
and after receiving a trigger preparation signal from the thyristor conduction tester VET, the VBE screen cabinet judges whether the current test environment meets a standard test environment.
3. The method for testing the conduction of the thyristor of the converter valve based on the wireless signal transmission of claim 1, wherein the VBE panel cabinet sends a trigger-allowing signal to the thyristor conduction tester VET when the current testing environment meets the standard testing environment, and the method comprises the following steps:
and judging whether the current test environment meets the standard test environment or not according to the voltage parameter and the current parameter of the target thyristor, the mode of the VBE screen cabinet and the grounding state of the valve hall.
4. The method for testing the conduction of the thyristor of the converter valve based on the wireless signal transmission of claim 1, wherein the number of the target thyristors is 1 or more.
5. The converter valve thyristor conduction test method based on wireless signal transmission according to claim 4, wherein the target thyristors are a plurality of sequential series structures;
when the target thyristor is judged to be abnormal, the target thyristor is divided into two groups of series structures, namely a first abnormal thyristor group to be tested and a second abnormal thyristor group to be tested; the difference between the numbers of thyristors in the first abnormal thyristor group to be tested and the second abnormal thyristor group to be tested is not more than 1;
and (5) respectively taking the first abnormal thyristor group to be tested and the second abnormal thyristor group to be tested as the target thyristors, and executing the step 4 and the step 5 until all abnormal thyristors are determined.
6. The converter valve thyristor conduction test method based on wireless signal transmission according to claim 1, wherein the wireless communication network is a bluetooth network, a WIFI network or a cellular network.
7. The utility model provides a converter valve thyristor switches on test system based on wireless signal transmission which characterized in that includes:
the thyristor conduction tester VET comprises a first wireless communication module; a VBE screen cabinet with a second wireless communication module; and a wireless communication network is established between the thyristor conduction tester VET and the VBE screen cabinet through the first wireless communication module and the second wireless communication module.
8. The wireless signal transmission based thyristor conduction test system for a converter valve as claimed in claim 7, further comprising:
establishing a routing device of the wireless communication network;
the thyristor conduction tester VET is connected to the wireless communication network through a first wireless communication module on the thyristor conduction tester VET, and the VBE screen cabinet is connected to the wireless communication network through a second wireless communication module on the VBE screen cabinet.
9. The wireless signal transmission based thyristor conduction test system for a converter valve as claimed in claim 7, further comprising:
the valve hall is provided with at least one group of converter valves;
and the VBE screen cabinet is connected with the thyristors on at least one group of converter valves in the valve hall.
10. The wireless signal transmission based thyristor conduction test system for a converter valve according to claim 7,
the first wireless communication module and the second wireless communication module are powered by a secondary side of the converter station.
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| CN114966359A (en) * | 2022-05-17 | 2022-08-30 | 中国南方电网有限责任公司超高压输电公司广州局 | Thyristor test method, device, computer equipment, storage medium and product |
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