CN113777437A - System and method for testing extra-high voltage direct current wall bushing - Google Patents
System and method for testing extra-high voltage direct current wall bushing Download PDFInfo
- Publication number
- CN113777437A CN113777437A CN202111345324.5A CN202111345324A CN113777437A CN 113777437 A CN113777437 A CN 113777437A CN 202111345324 A CN202111345324 A CN 202111345324A CN 113777437 A CN113777437 A CN 113777437A
- Authority
- CN
- China
- Prior art keywords
- current
- high voltage
- direct
- wall bushing
- extra
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/003—Environmental or reliability tests
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/18—Screening arrangements against electric or magnetic fields, e.g. against earth's field
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/28—Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a system and a method for testing and examining an extra-high voltage direct current wall bushing, and belongs to the technical field of high voltage and large current tests. The system of the present invention comprises: and the direct-current voltage generation loop is connected with an extra-high voltage direct-current wall bushing to be tested, and the direct-current voltage generation loop comprises: the direct current high voltage generating device and the direct current resistance voltage divider; the closed loop is connected with the direct-current voltage generation loop and the extra-high voltage direct-current wall bushing to be tested, and comprises: the device comprises a current generating device, a test support direct-current wall bushing connected with the extra-high voltage direct-current wall bushing to be tested, and a gas-insulated tubular bus connected with the extra-high voltage direct-current wall bushing to be tested. The method can replace the verification of the net hanging operation, and reduce the net hanging operation risk of the newly put-into-operation extra-high voltage direct current wall bushing.
Description
Technical Field
The invention relates to the technical field of high-voltage and high-current tests, in particular to a system and a method for testing an extra-high voltage direct-current wall bushing.
Background
The direct-current wall bushing in the extra-high voltage direct-current converter station is used as important high-voltage electrical equipment for connecting a converter station valve hall and direct-current field equipment, and the performance stability of the direct-current wall bushing is directly related to the safe operation of an alternating-current and direct-current hybrid power grid. Compared with the conventional alternating current sleeve, the extra-high voltage direct current wall bushing has the advantages that the operation working condition and the environmental condition are severe, and the direct current voltage, the direct current, the outdoor filth and the rain and snow conditions are borne at the same time. As the operating conditions are complex, the requirements on insulation, thermal, mechanical and sealing performances are strict, and the design, manufacture and performance evaluation of products are difficult, the +/-800 kV direct-current wall bushing in China is provided by the Swedish ABB company, the Germany Siemens HSP company and the Italy P & V company, and the construction of ultrahigh-voltage engineering and the localization of equipment in China are severely restricted.
However, even if the direct-current wall bushing which is subjected to the systematic assessment of one-by-one tests, type tests and special test items specified by IEC standards at present is adopted, defects and faults in the aspects of insulating property, thermal property and sealing property are exposed in long-term operation. The frequently-occurring faults and defects of the extra-high voltage direct-current wall bushing show that the stability of the long-term performance of the extra-high voltage direct-current wall bushing under the long-term electricity, heat and force multi-stress coupling action cannot be completely checked only through an insulation tolerance test for singly applying high voltage, a temperature rise performance test for singly applying large current and a mechanical performance checking test for singly applying cantilever load specified by the existing standard.
In order to research the running performance of the extra-high voltage alternating current bushing under the simultaneous action of high voltage and current, the China electric academy has preliminarily built a first extra-high voltage alternating current bushing all-condition assessment test loop in the world in an extra-high voltage alternating current test base, has the long-term electrification assessment test capability under the combined action of simultaneously applying rated voltage and rated current to 2 extra-high voltage oil-air bushings and 2 extra-high voltage oil-gas bushings, can carry out long-term electrification assessment tests and engineering application feasibility researches on developed extra-high voltage alternating current bushings under the action of high voltage, large current and high mechanical load, aims at long-term electrification assessment of direct current bushing equipment, establishes a first relatively complete extra-high voltage direct current wall-penetrating bushing examination nuclear field in an STRI laboratory of Ludvika in 2006 by ABB company, the loop can apply 855kV of direct current voltage, and comprises a valve hall for simulating actual working conditions of bushings at the temperature of 50 ℃, the method can realize the long-term live examination of the direct-current wall bushing under the direct-current voltage.
The extra-high voltage direct current wall bushing has the problems of distortion of an electric field at a gradient temperature and charge accumulation under a long-term direct current voltage when operating under the harsh conditions of high direct current voltage component, large load current and high operating environment temperature for a long time, and is a type of direct current equipment with the highest threshold and the highest fault rate in the prior art. However, the existing IEC single alternating voltage, single alternating voltage or single large current test assessment method cannot verify the comprehensive performance of the extra-high voltage direct current wall bushing, so that the direct current bushing assessed by the IEC standard loop frequently exposes defects in operation and generates electrothermal coupling type discharge faults.
In the prior art, a test loop applying a single direct current voltage is generally used, a first relatively complete extra-high voltage direct current bushing examination field in the world is established in an STRI laboratory of Ludvika in 2006 by ABB company, the direct current voltage applied by the loop is 855kV, the extra-high voltage direct current bushing examination field comprises a valve hall with the temperature of 50 ℃ for simulating the actual working condition of a bushing, the electrification examination of the direct current wall bushing under the long-term direct current voltage can be realized, and the faults of Italian P & V direct current wall bushings which are not subjected to the test examination are frequent from the current fault record.
The extra-high voltage direct current equipment test and assessment circuit established by the ABB in Sweden can only perform test and assessment under single direct current voltage on the extra-high voltage direct current wall bushing, can not apply direct current voltage and large load current at the same time, is only suitable for pure SF6 gas insulation direct current wall bushing with good ABB thermal performance design, and can not verify the direct current performance of electric field distribution change under the influence of axial radial temperature gradient of a core insulation material under large load current on the extra-high voltage direct current wall bushing with a glue-impregnated paper capacitor core with poor heat conduction performance as main insulation, and also verifies the single direct current voltage test under the action of electric-thermal coupling of the glue-impregnated paper direct current wall bushing in operation, which is not enough to verify the comprehensive performance under the operation condition of the direct current wall bushing.
Disclosure of Invention
In order to solve the above problems, the present invention provides a system for testing an extra-high voltage dc wall bushing, comprising:
and the direct-current voltage generation loop is connected with an extra-high voltage direct-current wall bushing to be tested, and the direct-current voltage generation loop comprises: the direct-current high-voltage generating device is used for generating direct-current high voltage; and the direct current resistance voltage divider is used for carrying out data measurement on the extra-high voltage direct current wall bushing to be tested after the direct current high voltage and the alternating current heavy current are applied to the extra-high voltage direct current wall bushing to be tested, so as to obtain test data, wherein the test data comprises: direct current high voltage and local discharge pulse data in the casing; determining the extra-high voltage direct current wall bushing to be tested through the test data, wherein the extra-high voltage direct current wall bushing can bear direct current high voltage and alternating current heavy current applied at the same time;
the closed loop is connected with the direct-current voltage generation loop and the extra-high voltage direct-current wall bushing to be tested, and comprises: the system comprises a current generating device, a test support direct-current wall bushing connected with the extra-high voltage direct-current wall bushing to be tested, and a gas-insulated tubular bus connected with the extra-high voltage direct-current wall bushing to be tested;
the current generating device is used for generating alternating current heavy current;
the test support direct-current wall bushing receives direct-current high voltage generated by the direct-current high-voltage generating device and alternating-current heavy current generated by the current generating device, and applies the direct-current high voltage and the alternating-current heavy current to the extra-high voltage direct-current wall bushing to be tested through a gas-insulated pipe bus;
the gas-insulated tubular bus is used for insulating and isolating the direct-current high voltage and the current generating device.
Optionally, in the dc voltage generating circuit, the dc high voltage generating device is connected in parallel with the dc resistor voltage divider.
Optionally, the closed loop further includes: the first auxiliary tubular bus outgoing sleeve and the second auxiliary tubular bus outgoing sleeve are respectively installed on two sides of the gas-insulated tubular bus, the first auxiliary tubular bus outgoing sleeve is used for leading the direct-current high voltage and the alternating-current large current into the gas-insulated tubular bus, and the second auxiliary tubular bus outgoing sleeve is used for leading the direct-current high voltage and the alternating-current large current out of the gas-insulated tubular bus to the extra-high voltage direct-current wall bushing to be tested.
Optionally, the dc voltage generating circuit is located inside the simulation valve hall of the test field.
Optionally, the closed loop is located outside the test field simulation valve hall.
Optionally, the system further comprises supporting the intermediate conductor of the gas-insulated pipe bus with a post insulator, and injecting SF6 gas inside the intermediate conductor.
Optionally, the current generating device is a feed-through structure, and includes a plurality of current generators, and the plurality of current generators are arranged side by side outside the gas-insulated pipe bus.
Optionally, the direct-current wall bushing for test support of the closed loop, the first auxiliary tubular bus outgoing line bushing, the second auxiliary tubular bus outgoing line bushing, the gas-insulated tubular bus and the extra-high voltage direct-current wall bushing to be tested are connected in series, and a current generating device is connected in parallel outside the gas-insulated tubular bus.
Optionally, it is determined through the test data that the to-be-tested extra-high voltage dc wall bushing can bear a dc high voltage and an ac large current applied at the same time, and the method specifically includes:
determining whether the extra-high voltage direct-current wall bushing to be tested has breakdown flashover or not based on the direct-current high voltage in the bushing, and if the direct-current high voltage in the bushing is not 0, determining that the extra-high voltage direct-current wall bushing to be tested does not have breakdown flashover;
determining the frequency of partial discharge of more than 2000pC in the ultra-high voltage direct current wall bushing to be tested based on the partial discharge pulse data;
and if the ultra-high voltage direct current wall bushing to be tested does not have breakdown flashover and the number of times of partial discharge of more than 2000pC in the ultra-high voltage direct current wall bushing to be tested is less than the number threshold, determining the ultra-high voltage direct current wall bushing to be tested and bearing the direct current high voltage and the alternating current large current which are applied simultaneously.
The invention also provides a method for testing the extra-high voltage direct current wall bushing, which comprises the following steps:
generating a direct current high voltage by a direct current voltage generating device and generating an alternating current large current by a current generating device;
the direct-current high voltage is insulated and isolated from the current generating device through a gas-insulated tubular bus;
the method comprises the following steps that a direct-current wall bushing for test support is used for receiving direct-current high voltage generated by a direct-current high-voltage generating device and alternating-current heavy current generated by a current generating device, and the direct-current high voltage and the alternating-current heavy current are applied to an extra-high voltage direct-current wall bushing to be tested through a gas-insulated pipe bus;
through the direct current resistance voltage divider, after direct current high voltage and alternating current heavy current are applyed the extra-high voltage direct current wall bushing of treating the experiment, treat the extra-high voltage direct current wall bushing of experimenting and carry out data measurement to acquire test data, wherein test data includes: direct current high voltage and local discharge pulse data in the casing; and determining the extra-high voltage direct current wall bushing to be tested through the test data, wherein the extra-high voltage direct current wall bushing can bear direct current high voltage and alternating current heavy current applied at the same time.
Optionally, it is determined through the test data that the to-be-tested extra-high voltage dc wall bushing can bear a dc high voltage and an ac large current applied at the same time, and the method specifically includes:
determining whether the extra-high voltage direct-current wall bushing to be tested has breakdown flashover or not based on the direct-current high voltage in the bushing, and if the direct-current high voltage in the bushing is not 0, determining that the extra-high voltage direct-current wall bushing to be tested does not have breakdown flashover;
determining the frequency of partial discharge of more than 2000pC in the ultra-high voltage direct current wall bushing to be tested based on the partial discharge pulse data;
and if the ultra-high voltage direct current wall bushing to be tested does not have breakdown flashover and the number of times of partial discharge of more than 2000pC in the ultra-high voltage direct current wall bushing to be tested is less than the number threshold, determining the ultra-high voltage direct current wall bushing to be tested and bearing the direct current high voltage and the alternating current large current which are applied simultaneously.
The invention can apply a test loop of direct current voltage and heat equivalent current to the extra-high voltage direct current wall bushing, can be used for verifying the reliability of the domestic extra-high voltage direct current wall bushing which is developed by adopting a new material, a new structure and a new manufacturing process under the combined action of simulated operation working conditions, high voltage and large current for a long time, can replace the on-grid operation verification, and reduces the on-grid operation risk of the newly-put extra-high voltage direct current wall bushing.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention;
FIG. 2 is a layout diagram of an embodiment of the system of the present invention;
FIG. 3 is a flow chart of the method of the present invention.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
The invention provides a system for testing an extra-high voltage direct current wall bushing, as shown in figure 1, comprising:
and the direct-current voltage generation loop is connected with an extra-high voltage direct-current wall bushing to be tested, and the direct-current voltage generation loop comprises: the direct-current high-voltage generating device is used for generating direct-current high voltage; and the direct current resistance voltage divider is used for carrying out data measurement on the extra-high voltage direct current wall bushing to be tested after the direct current high voltage and the alternating current heavy current are applied to the extra-high voltage direct current wall bushing to be tested, so as to obtain test data, wherein the test data comprises: direct current high voltage and local discharge pulse data in the casing; determining the extra-high voltage direct current wall bushing to be tested through the test data, wherein the extra-high voltage direct current wall bushing can bear direct current high voltage and alternating current heavy current applied at the same time;
the closed loop is connected with the direct-current voltage generation loop and the extra-high voltage direct-current wall bushing to be tested, and comprises: the system comprises a current generating device, a test support direct-current wall bushing connected with the extra-high voltage direct-current wall bushing to be tested, and a gas-insulated tubular bus connected with the extra-high voltage direct-current wall bushing to be tested;
the current generating device is used for generating alternating current heavy current;
the test support direct-current wall bushing receives direct-current high voltage generated by the direct-current high-voltage generating device and alternating-current heavy current generated by the current generating device, and applies the direct-current high voltage and the alternating-current heavy current to the extra-high voltage direct-current wall bushing to be tested through a gas-insulated pipe bus;
the gas-insulated tubular bus is used for insulating and isolating the direct-current high voltage and the current generating device.
Wherein, in the direct current voltage generating loop, the direct current high voltage generating device is connected with the direct current resistance voltage divider in parallel.
Wherein, closed circuit still includes: the first auxiliary tubular bus outgoing sleeve and the second auxiliary tubular bus outgoing sleeve are respectively installed on two sides of the gas-insulated tubular bus, the first auxiliary tubular bus outgoing sleeve is used for leading the direct-current high voltage and the alternating-current large current into the gas-insulated tubular bus, and the second auxiliary tubular bus outgoing sleeve is used for leading the direct-current high voltage and the alternating-current large current out of the gas-insulated tubular bus to the extra-high voltage direct-current wall bushing to be tested.
Wherein, direct current voltage generating circuit is located the inboard of test field simulation valve room.
Wherein, closed circuit is located the outside of test field simulation valve room.
Wherein the system further comprises a middle conductor supporting the gas-insulated pipe bus by a post insulator, and SF6 gas is injected into the middle conductor.
The current generating device is of a straight-through structure and comprises a plurality of groups of current generators, and the current generators are arranged outside the gas-insulated tubular bus in parallel.
The direct-current wall bushing for the test support of the closed loop, the first auxiliary tubular bus outgoing bushing, the second auxiliary tubular bus outgoing bushing, the gas-insulated tubular bus and the extra-high voltage direct-current wall bushing to be tested are connected in series, and a current generating device is connected outside the gas-insulated tubular bus in parallel.
The method comprises the following steps of determining that the extra-high voltage direct-current wall bushing to be tested can bear direct-current high voltage and alternating-current heavy current applied at the same time through the test data, and specifically comprises the following steps:
determining whether the extra-high voltage direct-current wall bushing to be tested has breakdown flashover or not based on the direct-current high voltage in the bushing, and if the direct-current high voltage in the bushing is not 0, determining that the extra-high voltage direct-current wall bushing to be tested does not have breakdown flashover;
determining the frequency of partial discharge of more than 2000pC in the ultra-high voltage direct current wall bushing to be tested based on the partial discharge pulse data;
and if the ultra-high voltage direct current wall bushing to be tested does not have breakdown flashover and the number of times of partial discharge of more than 2000pC in the ultra-high voltage direct current wall bushing to be tested is less than the number threshold, determining the ultra-high voltage direct current wall bushing to be tested and bearing the direct current high voltage and the alternating current large current which are applied simultaneously.
The invention is further illustrated by the following examples:
the invention combines the 1.0-1.2 times rated voltage of the extra-high voltage direct current wall bushing below the +/-1100 kV level and the long-term high-voltage heavy-current test requirement under the rated current to establish a test loop system which can simultaneously apply direct-current high voltage and alternating-current heavy current to the extra-high voltage direct current wall bushing below the +/-1100 kV level, and the test loop system is shown in figure 2 and comprises: the test device comprises a direct-current voltage generating loop, a high-voltage large-current closed loop and an extra-high-voltage direct-current wall bushing to be tested.
(1) The direct current voltage generating circuit is arranged on the inner side of the test field and comprises: a DC high voltage generating device and a DC resistance divider.
The direct-current high-voltage generating device is used for generating direct-current high voltage meeting the long-term direct-current voltage insulation performance of an extra-high-voltage direct-current wall bushing below +/-1100 kV level, the direct-current high voltage is applied to a high-voltage large-current closed loop, and the direct-current wall bushing to be tested and examined and an auxiliary bushing for a high-voltage large-current loop test bear the applied direct-current high voltage.
The direct-current resistance voltage divider is used for measuring direct-current high voltage generated by the direct-current voltage generating device, leakage current generated by the whole loop and partial discharge pulse generated by the whole loop, and voltage, leakage current and partial discharge pulse measurement data can be used for accurately evaluating the examined ultrahigh-voltage direct-current wall bushing.
Wherein, the direct current high voltage is over one hundred kilovolts of direct current voltage or more than 10 ten thousand kilovolts of direct current voltage.
(2) High voltage heavy current closed circuit places in the outdoor side of test field, includes: gas-insulated tubular busbar and current generation device still include: auxiliary sleeve for test.
The gas-insulated tubular bus is used for insulating and isolating a direct-current high-voltage and large-current generating device of an integral test loop and comprises an end barrel, a high-voltage bushing outgoing from the end and a middle conductor conductive tube are supported by a post insulator, SF6 gas is filled in the high-voltage bushing outgoing from the end and the middle conductor conductive tube, the conductive tube in the integral tubular bus bears the direct-current high voltage and the alternating current, and the direct-current high voltage and the alternating current are applied to a direct-current wall bushing for test support and an extra-high voltage direct-current wall bushing to be tested.
The current generating device is used for generating alternating current heavy current meeting the long-term alternating current carrying performance of an extra-high voltage direct current wall bushing below +/-1100 kV level, the alternating current heavy current is applied to a conductive tube inside a tube bus in a high-voltage heavy current closed loop, the direct current wall bushing and an auxiliary bushing for a high-voltage heavy current loop test to be tested and examined bear the applied alternating current heavy current, the heavy current generating device adopts a through design, and a mode that a plurality of groups of through heavy current generators are horizontally arranged and installed outside a gas insulation tube bus is adopted.
Wherein the AC large current is an AC current of 1000A or more.
(3) The extra-high voltage direct current wall bushing to be tested is an examined extra-high voltage direct current wall bushing arranged on an indoor and outdoor dividing support wall of a test field. The ultrahigh voltage direct-current wall bushing to be tested and examined is accurately evaluated through voltage, leakage current and partial discharge pulse measurement data.
(4) The auxiliary sleeve (3 sleeves) for the high-voltage large-current loop test comprises 1 direct-current wall bushing for test support and 2 SF6 gas-insulated auxiliary tube bus outgoing sleeves.
The direct current wall bushing for the test support is 1, is installed on an indoor and outdoor boundary support wall of the test field, bears direct current high voltage and alternating current heavy current, is used for leading the direct current high voltage and the alternating current heavy current out of the indoor side of the test field and is applied to a gas insulated pipe bus at the outdoor side of the test field.
The 2 outgoing line sleeves of the gas insulated tube bus are respectively installed at two ends of the outdoor gas insulated tube bus, are respectively connected with the direct-current wall bushing to be tested and examined and the direct-current wall bushing for test support, and are used for leading in and leading out direct-current high voltage and alternating-current heavy current from the gas insulated tube bus and applying the direct-current high voltage and the alternating-current heavy current to the gas insulated tube bus, the direct-current wall bushing to be tested and examined and the direct-current wall bushing for test support.
The invention also provides a method for testing the extra-high voltage direct current wall bushing, which comprises the following steps of:
generating a direct current high voltage by a direct current voltage generating device and generating an alternating current large current by a current generating device;
the direct-current high voltage is insulated and isolated from the current generating device through a gas-insulated tubular bus;
the method comprises the following steps that a direct-current wall bushing for test support is used for receiving direct-current high voltage generated by a direct-current high-voltage generating device and alternating-current heavy current generated by a current generating device, and the direct-current high voltage and the alternating-current heavy current are applied to an extra-high voltage direct-current wall bushing to be tested through a gas-insulated pipe bus;
through the direct current resistance voltage divider, after direct current high voltage and alternating current heavy current are applyed the extra-high voltage direct current wall bushing of treating the experiment, treat the extra-high voltage direct current wall bushing of experimenting and carry out data measurement to acquire test data, wherein test data includes: direct current high voltage and local discharge pulse data in the casing; and determining the extra-high voltage direct current wall bushing to be tested through the test data, wherein the extra-high voltage direct current wall bushing can bear direct current high voltage and alternating current heavy current applied at the same time.
The method comprises the following steps of determining that the extra-high voltage direct-current wall bushing to be tested can bear direct-current high voltage and alternating-current heavy current applied at the same time through the test data, and specifically comprises the following steps:
determining whether the extra-high voltage direct-current wall bushing to be tested has breakdown flashover or not based on the direct-current high voltage in the bushing, and if the direct-current high voltage in the bushing is not 0, determining that the extra-high voltage direct-current wall bushing to be tested does not have breakdown flashover;
determining the frequency of partial discharge of more than 2000pC in the ultra-high voltage direct current wall bushing to be tested based on the partial discharge pulse data;
and if the ultra-high voltage direct current wall bushing to be tested does not have breakdown flashover and the number of times of partial discharge of more than 2000pC in the ultra-high voltage direct current wall bushing to be tested is less than the number threshold, determining the ultra-high voltage direct current wall bushing to be tested and bearing the direct current high voltage and the alternating current large current which are applied simultaneously.
The invention can apply a test loop of direct current voltage and heat equivalent current to the extra-high voltage direct current wall bushing, can be used for verifying the reliability of the domestic extra-high voltage direct current wall bushing which is developed by adopting a new material, a new structure and a new manufacturing process under the combined action of simulated operation working conditions, high voltage and large current for a long time, can replace the on-grid operation verification, and reduces the on-grid operation risk of the newly-put extra-high voltage direct current wall bushing.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein. The scheme in the embodiment of the invention can be realized by adopting various computer languages, such as object-oriented programming language Java and transliterated scripting language JavaScript.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (11)
1. A system for testing an extra-high voltage direct current wall bushing, the system comprising:
and the direct-current voltage generation loop is connected with an extra-high voltage direct-current wall bushing to be tested, and the direct-current voltage generation loop comprises: the direct-current high-voltage generating device is used for generating direct-current high voltage; and the direct current resistance voltage divider is used for carrying out data measurement on the extra-high voltage direct current wall bushing to be tested after the direct current high voltage and the alternating current heavy current are applied to the extra-high voltage direct current wall bushing to be tested, so as to obtain test data, wherein the test data comprises: direct current high voltage and local discharge pulse data in the casing; determining the extra-high voltage direct current wall bushing to be tested through the test data, wherein the extra-high voltage direct current wall bushing can bear direct current high voltage and alternating current heavy current applied at the same time;
the closed loop is connected with the direct-current voltage generation loop and the extra-high voltage direct-current wall bushing to be tested, and comprises: the system comprises a current generating device, a test support direct-current wall bushing connected with the extra-high voltage direct-current wall bushing to be tested, and a gas-insulated tubular bus connected with the extra-high voltage direct-current wall bushing to be tested;
the current generating device is used for generating alternating current heavy current;
the test support direct-current wall bushing receives direct-current high voltage generated by the direct-current high-voltage generating device and alternating-current heavy current generated by the current generating device, and applies the direct-current high voltage and the alternating-current heavy current to the extra-high voltage direct-current wall bushing to be tested through a gas-insulated pipe bus;
the gas-insulated tubular bus is used for insulating and isolating the direct-current high voltage and the current generating device.
2. The system of claim 1, wherein said dc high voltage generating means is connected in parallel with a dc resistor divider in said dc voltage generating circuit.
3. The system of claim 1, the closed loop, further comprising: the first auxiliary tubular bus outgoing sleeve and the second auxiliary tubular bus outgoing sleeve are respectively installed on two sides of the gas-insulated tubular bus, the first auxiliary tubular bus outgoing sleeve is used for leading the direct-current high voltage and the alternating-current large current into the gas-insulated tubular bus, and the second auxiliary tubular bus outgoing sleeve is used for leading the direct-current high voltage and the alternating-current large current out of the gas-insulated tubular bus to the extra-high voltage direct-current wall bushing to be tested.
4. The system of claim 1, wherein the dc voltage generating circuit is located inside a simulation valve hall of the test field.
5. The system of claim 1, the closed loop being located outside of a test field simulation valve hall.
6. The system of claim 1, further comprising supporting a middle conductor of the gas insulated pipe bus with a post insulator, and injecting SF6 gas inside the middle conductor.
7. The system of claim 1, the current generating device being a feed-through configuration comprising a plurality of sets of current generators arranged side-by-side outside of a gas insulated tubular bus.
8. The system of claim 3, wherein the direct-current wall bushing for test support, the first auxiliary tubular bus outgoing bushing, the second auxiliary tubular bus outgoing bushing, the gas-insulated tubular bus and the extra-high voltage direct-current wall bushing to be tested are connected in series, and the current generating device is connected in parallel outside the gas-insulated tubular bus.
9. The system of claim 1, wherein the step of determining, through the test data, that the to-be-tested ultra-high voltage dc wall bushing can withstand a dc high voltage and an ac high current applied simultaneously comprises:
determining whether the extra-high voltage direct-current wall bushing to be tested has breakdown flashover or not based on the direct-current high voltage in the bushing, and if the direct-current high voltage in the bushing is not 0, determining that the extra-high voltage direct-current wall bushing to be tested does not have breakdown flashover;
determining the frequency of partial discharge of more than 2000pC in the ultra-high voltage direct current wall bushing to be tested based on the partial discharge pulse data;
and if the ultra-high voltage direct current wall bushing to be tested does not have breakdown flashover and the number of times of partial discharge of more than 2000pC in the ultra-high voltage direct current wall bushing to be tested is less than the number threshold, determining the ultra-high voltage direct current wall bushing to be tested and bearing the direct current high voltage and the alternating current large current which are applied simultaneously.
10. A method of testing an extra-high voltage dc wall bushing using the system of any of claims 1-8, the method comprising:
generating a direct current high voltage by a direct current voltage generating device and generating an alternating current large current by a current generating device;
the direct-current high voltage is insulated and isolated from the current generating device through a gas-insulated tubular bus;
the method comprises the following steps that a direct-current wall bushing for test support is used for receiving direct-current high voltage generated by a direct-current high-voltage generating device and alternating-current heavy current generated by a current generating device, and the direct-current high voltage and the alternating-current heavy current are applied to an extra-high voltage direct-current wall bushing to be tested through a gas-insulated pipe bus;
through the direct current resistance voltage divider, after direct current high voltage and alternating current heavy current are applyed the extra-high voltage direct current wall bushing of treating the experiment, treat the extra-high voltage direct current wall bushing of experimenting and carry out data measurement to acquire test data, wherein test data includes: direct current high voltage and local discharge pulse data in the casing; and determining the extra-high voltage direct current wall bushing to be tested through the test data, wherein the extra-high voltage direct current wall bushing can bear direct current high voltage and alternating current heavy current applied at the same time.
11. The method according to claim 10, wherein the step of determining, through the test data, that the extra-high voltage dc wall bushing to be tested can withstand a dc high voltage and an ac high current applied simultaneously comprises:
determining whether the extra-high voltage direct-current wall bushing to be tested has breakdown flashover or not based on the direct-current high voltage in the bushing, and if the direct-current high voltage in the bushing is not 0, determining that the extra-high voltage direct-current wall bushing to be tested does not have breakdown flashover;
determining the frequency of partial discharge of more than 2000pC in the ultra-high voltage direct current wall bushing to be tested based on the partial discharge pulse data;
and if the ultra-high voltage direct current wall bushing to be tested does not have breakdown flashover and the number of times of partial discharge of more than 2000pC in the ultra-high voltage direct current wall bushing to be tested is less than the number threshold, determining the ultra-high voltage direct current wall bushing to be tested and bearing the direct current high voltage and the alternating current large current which are applied simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111345324.5A CN113777437B (en) | 2021-11-15 | 2021-11-15 | System and method for testing extra-high voltage direct current wall bushing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111345324.5A CN113777437B (en) | 2021-11-15 | 2021-11-15 | System and method for testing extra-high voltage direct current wall bushing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113777437A true CN113777437A (en) | 2021-12-10 |
| CN113777437B CN113777437B (en) | 2022-02-11 |
Family
ID=78873941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111345324.5A Active CN113777437B (en) | 2021-11-15 | 2021-11-15 | System and method for testing extra-high voltage direct current wall bushing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113777437B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113899978A (en) * | 2021-12-13 | 2022-01-07 | 中国电力科学研究院有限公司 | Test system, method and circuit for checking extra-high voltage converter transformer bushing |
| CN117269691A (en) * | 2023-09-27 | 2023-12-22 | 国网山西省电力公司电力科学研究院 | System and method for testing internal state and insulation characteristic of wall bushing |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57157163A (en) * | 1981-03-24 | 1982-09-28 | Hitachi Cable Ltd | Testing method for power cable |
| CN106646206A (en) * | 2015-10-29 | 2017-05-10 | 全球能源互联网研究院 | High-voltage heavy-current compound injection DC circuit breaker synthetic test circuit and method |
| CN107110912A (en) * | 2015-06-26 | 2017-08-29 | 株式会社东芝 | The test method of dc circuit breaker |
| CN208443991U (en) * | 2018-03-29 | 2019-01-29 | 云南电网有限责任公司电力科学研究院 | A kind of double pressure power supply pilot systems of direct current |
| CN109298263A (en) * | 2018-10-22 | 2019-02-01 | 西安交通大学 | Arrester valve piece accelerated aging tester based on dc-couple impact power supply |
| CN110161392A (en) * | 2019-06-21 | 2019-08-23 | 国网辽宁省电力有限公司沈阳供电公司 | A kind of big molded cannula insulating properties detection system and method for high temperature and pressure mica group |
| CN111781476A (en) * | 2020-06-18 | 2020-10-16 | 国网电力科学研究院武汉南瑞有限责任公司 | Transformer dry-type casing defect simulation and performance state monitoring system and method |
-
2021
- 2021-11-15 CN CN202111345324.5A patent/CN113777437B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57157163A (en) * | 1981-03-24 | 1982-09-28 | Hitachi Cable Ltd | Testing method for power cable |
| CN107110912A (en) * | 2015-06-26 | 2017-08-29 | 株式会社东芝 | The test method of dc circuit breaker |
| CN106646206A (en) * | 2015-10-29 | 2017-05-10 | 全球能源互联网研究院 | High-voltage heavy-current compound injection DC circuit breaker synthetic test circuit and method |
| CN208443991U (en) * | 2018-03-29 | 2019-01-29 | 云南电网有限责任公司电力科学研究院 | A kind of double pressure power supply pilot systems of direct current |
| CN109298263A (en) * | 2018-10-22 | 2019-02-01 | 西安交通大学 | Arrester valve piece accelerated aging tester based on dc-couple impact power supply |
| CN110161392A (en) * | 2019-06-21 | 2019-08-23 | 国网辽宁省电力有限公司沈阳供电公司 | A kind of big molded cannula insulating properties detection system and method for high temperature and pressure mica group |
| CN111781476A (en) * | 2020-06-18 | 2020-10-16 | 国网电力科学研究院武汉南瑞有限责任公司 | Transformer dry-type casing defect simulation and performance state monitoring system and method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113899978A (en) * | 2021-12-13 | 2022-01-07 | 中国电力科学研究院有限公司 | Test system, method and circuit for checking extra-high voltage converter transformer bushing |
| CN117269691A (en) * | 2023-09-27 | 2023-12-22 | 国网山西省电力公司电力科学研究院 | System and method for testing internal state and insulation characteristic of wall bushing |
| CN117269691B (en) * | 2023-09-27 | 2024-05-14 | 国网山西省电力公司电力科学研究院 | System and method for testing internal state and insulation characteristic of wall bushing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113777437B (en) | 2022-02-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113777437B (en) | System and method for testing extra-high voltage direct current wall bushing | |
| CN103091609A (en) | Performance detecting system and method thereof of gas insulated substation (GIS) partial discharge on-line monitoring device | |
| CN102645596B (en) | High-voltage and high-current composite thermally stable test method and device for high-voltage casing pipe | |
| CN105116360A (en) | ADPSS (advanced digital power system simulator) based test system for low current grounding line selector and test method of system | |
| Bak et al. | Vacuum circuit breaker modelling for the assessment of transient recovery voltages: Application to various network configurations | |
| Alboyaci et al. | Evaluation of the effect of structural defects in the heat-shrink cable terminal on electric field distribution | |
| Riechert | Compact high voltage direct current gas-insulated systems | |
| CN108802582A (en) | A kind of high-voltage cable middle joint Partial Discharge Detection pilot system | |
| CN116047184A (en) | Nuclear phase method and system for same-frequency same-phase withstand voltage test of three-phase co-tank GIS | |
| CN105823969A (en) | Apparatus for simulating partial discharge detects of transformer | |
| CN113899978A (en) | Test system, method and circuit for checking extra-high voltage converter transformer bushing | |
| CN211554215U (en) | Fault suppression system for common-frequency and same-phase voltage withstand test of three-phase common-cylinder GIS equipment | |
| Szewczyk | Multi-spark modeling of very fast transient overvoltages for the purposes of developing HV and UHV gas-insulated switchgear and of conducting insulation co-ordination studies | |
| Župan et al. | Multiple Chopped Wave Test: Experience and Possible Future Test Improvement | |
| Helać et al. | Power Transformer Neutral Point Grounding Methods: Analysis of Fault Characteristics | |
| Hernandez-Guiteras et al. | Feasibility analysis of reduced-scale air breakdown tests in high voltage laboratories combined with the use of scaled test cages | |
| Pakonen et al. | Condition assessment of medium voltage underground cables based on tangent delta and partial discharge measurements | |
| Li et al. | The experimental technique and practical scheme of intelligent switch in power distribution IoT | |
| Riechert et al. | Dielectric testing of cable connection assembly for gas-insulated HVDC systems | |
| Župan et al. | Capacitively Graded Oil-Paper Insulation Behavior Under Repeated Flashover Conditions | |
| Demirol et al. | Effect of Laying Parameters and Non-sinusoidal Loading Condition of High-Voltage Underground Cables on Electrical Performance by Finite Element Method | |
| Jonsson | Advantages vs. risks with on-line monitoring of transformer bushings | |
| Kim et al. | Implementation of Power Cable Diagnostic Simulator using VLF | |
| Fogelberg | Surviving a short-circuit | |
| Liu et al. | Research on improving the reliability of the insulated tubular busbar engineering project |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |