Defect vibration simulation test device and method for oil-immersed shunt reactor

Abstract

The application discloses an oil-immersed shunt reactor defect vibration simulation test device and method, which comprises an oil tank, an iron core and a winding wound on the iron core arranged in the oil tank, a water content online monitoring device connected with the oil tank through an interface pipeline and used for monitoring the water content of the insulation oil in the oil tank in real time, an oil chromatography online monitoring device connected with the oil tank through an interface pipeline and used for monitoring the set gas content of the insulation oil in the oil tank in real time, a heating element arranged in the oil tank and used for heating the oil sample, a vibrating element arranged below the oil tank and used for generating vibration of a set frequency, and defect elements arranged on the iron core and the winding respectively and used for simulating the defects of the reactor. The application can simulate the vibration defects, local overheating defects and suspended discharge defects of the reactor and accumulate a large amount of defect diagnosis test data through monitoring electric and chemical characteristic quantities.

Description

Technical Field

[0001] This invention relates to the field of oil-immersed shunt reactor technology, and in particular to a test apparatus and method for simulating vibration of defects in oil-immersed shunt reactors. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] Oil-immersed shunt reactors are one of the most important reactive power compensation devices in ultra-high voltage long-distance power transmission and transformation systems, enabling functions such as long-line capacitance compensation and reduction of active power losses. However, to increase compensation capacity, oil-immersed shunt reactors often employ a multi-air-gap structure composed of multiple stacked iron core plates. The air gaps created by the segmented iron core columns result in strong air gap leakage magnetic fields between different iron core plates. Coupled with the hysteresis and expansion effects of the silicon steel sheets in the iron core, the shunt reactor experiences significant vibration even under normal operating conditions. Compared to electrical equipment such as transformers, its vibration and noise problems are more severe, making it extremely difficult to diagnose reactor defects by detecting vibration signals. On the other hand, due to the diversity of reactor mechanical structures and fault modes, there is relatively little experience in applying vibration signal analysis, as well as its derived noise and abnormal temperature analysis, to reactor defect detection, and the theoretical framework is also incomplete. This necessitates conducting extensive experiments and collecting and analyzing data through simulation testing platforms.

[0004] Furthermore, the unique multi-air-gap structure of oil-immersed shunt reactors results in leakage flux that is significantly greater than that of power transformers of the same voltage level. This leakage flux, passing through the metal components, generates current and a large amount of heat, easily leading to localized overheating and increasing stray losses. Therefore, thermal issues become particularly prominent in large-capacity reactors. The large amount of heat generated by high capacity and high voltage, if not dissipated promptly, will cause rapid insulation aging, resulting in the production of gases such as H2 and CH4. The severe vibrations of oil-immersed shunt reactors can also easily cause loosening of internal bolt-nut connections and detachment of the shielding balls. Loose nuts and detached shielding balls form suspended bodies inside the reactor tank, which are prone to levitation discharge under the extremely high electric field intensity inside the reactor. These issues are difficult to analyze in large quantities on-site and require data collection through laboratory simulations. Summary of the Invention

[0005] To address the aforementioned issues, this invention proposes an oil-immersed parallel reactor defect vibration simulation test device and method, which can simulate defects such as reactor vibration, overheating, and floating discharge gas generation, and accumulate a large amount of defect diagnosis test data by monitoring electrical, chemical and other characteristic quantities.

[0006] In some embodiments, the following technical solutions are adopted:

[0007] An oil-immersed shunt reactor defect vibration simulation test device comprises:

[0008] An oil tank, which is internally provided with a core and a winding wound on the core;

[0009] A moisture on-line monitoring device, which is connected to the oil tank through an interface pipeline and is used for monitoring the water content of the insulating oil in the oil tank in real time;

[0010] An oil chromatography on-line monitoring device, which is connected to the oil tank through an interface pipeline and is used for monitoring the set gas content of the insulating oil in the oil tank in real time;

[0011] A heating member, which is arranged in the oil tank and is used for heating the oil sample;

[0012] A vibrating member, which is arranged below the oil tank and is used for generating vibration of a set frequency;

[0013] Defect members, which are respectively arranged on the core and the winding and are used for simulating defects of the reactor.

[0014] As a further solution, the oil tank is provided at the top with an insulating sleeve, one end of a lead wire in the insulating sleeve is connected to a test power supply, and the other end of the lead wire is connected to the winding.

[0015] As a further solution, the oil tank is provided at the top, the bottom and the side with plug-in temperature measurement holes, respectively.

[0016] As a further solution, the oil tank is provided with a reserved pipeline for monitoring the pressure in the oil tank.

[0017] As a further solution, the oil tank is provided at the vertical surface with observation windows, respectively.

[0018] As a further solution, the oil tank is provided at the upper part with an oil filling valve and at the lower part with an oil discharging valve.

[0019] As a further solution, the defect members comprise a suspended discharge defect component, which is used for simulating winding processing defects, suspended discharge and turn-to-turn short circuit defects in the reactor.

[0020] As a further solution, the defect members comprise a thermal defect component, which is used for simulating local overheating defects caused by poor oil flow and insulation damage in the reactor.

[0021] In other embodiments, the following technical solutions are adopted:

[0022] An oil-immersed shunt reactor defect vibration simulation test method comprises:

[0023] By setting the floating discharge defect part or the thermal defect part on the winding and the core, the internal floating discharge defect or the thermal defect of the reactor is simulated;

[0024] The vibration part is started to simulate the operation of the shunt reactor under vibration condition, and the change of each operation characteristic quantity of the shunt reactor under vibration condition is monitored in real time; meanwhile, the internal discharge and bubble generation are observed; and the temperature change data, the partial discharge data, the water content of the insulating oil in the oil tank and the set gas content data of the insulating oil in the oil tank of the shunt reactor are monitored in real time.

[0025] During the test, the insulating oil in the oil tank is heated by starting the heating part to simulate the defect gas generation and discharge characteristics of the shunt reactor under different vibration and temperature conditions; meanwhile, the operation characteristic quantity and the defect test data of the shunt reactor are collected;

[0026] The collected various data are associated with the defect types under corresponding conditions, and the defect test database is established.

[0027] Compared with the prior art, the present application has the following beneficial effects:

[0028] (1) The present application can simulate the vibration defect, the local overheating defect and the floating discharge defect of the reactor, and a large amount of defect diagnosis test data can be accumulated by monitoring the electric, chemical and other characteristic quantities.

[0029] (2) The present application can simulate the gas generation and discharge defect of the reactor under actual vibration working condition by the vibration part, which is different from the existing transformer diagnosis method, and is beneficial to establish a defect and fault diagnosis method more suitable for the reactor.

[0030] Other features and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood by the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is a structure schematic view of the defect vibration simulation test device of the oil-immersed shunt reactor in the embodiment of the present application;

[0032] Figure 2 It is a winding and core structure schematic view in the embodiment of the present application.

[0033] 1. oil tank, 2. core, 2-1. core column, 2-2. core yoke, 3. winding, 4. observation window, 5. oil filling valve, 6. oil discharge valve, 7. sleeve, 8. thermometer, 9. pressure gauge, 10. water content online monitoring device, 11. oil chromatography online monitoring, 12. heating part, 13. thermal defect part, 14. floating discharge defect part. DETAILED DESCRIPTION

[0034] It should be noted that the following detailed description is exemplary in nature and is intended to provide further description of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0035] It is also important to note that the terms used herein are not intended to limit the particular embodiments of the present application disclosed in this specification. Rather, unless otherwise specified, as utilized in applying the exemplary embodiments of the present application, the following terms are intended to have the meanings presented:

[0036] Embodiment One

[0037] In one or more embodiments, an oil-immersed shunt reactor defect vibration simulation test device is disclosed, which combines Figure 1 , specifically comprising:

[0038] (1) an oil tank 1, the oil tank 1 is internally provided with a core 2 and a winding 3 wound on the core;

[0039] In combination with Figure 2 , the core 2 is composed of a core column 2-1 and an iron yoke 2-2. The core column 2-1 is stacked with circular core cakes, each of which is made of a marble block in the middle, the marbles are evenly distributed between the core cakes and are fixed with oil-resistant and high-temperature resistant adhesive glue. The iron yoke 2-2 is divided into upper and lower iron yokes and a side yoke, which is stacked with silicon steel sheets to provide a magnetic circuit for the reactor. There is a clamp on the left and right sides of the upper and lower parts of the iron yoke, which tightly fixes the silicon steel sheets in the iron yoke 2-2 together through the pressing force, playing the role of fastening the iron yoke. At the same time, the clamp and the iron yoke are insulated.

[0040] The winding 3 is made of copper electromagnetic wire winding of a true type oil-immersed shunt reactor, which is wound continuously, and the number of turns, thickness and height are determined according to the needs.

[0041] In this embodiment, the oil tank 1 selects a true type reactor oil tank steel shell; the size of the oil tank 1 needs to be considered comprehensively according to the voltage grade, the setting of auxiliary devices, the realization of auxiliary functions and other factors.

[0042] The oil tank 1 is provided with four circular observation windows 4 at the center positions of the four vertical faces, which can be used to observe the internal structure; of course, the shape of the observation hole is not limited to circular, but can be other shapes. The observation window 4 is made of oil-resistant and high-temperature-resistant transparent PC board, which is fixed with oil-resistant and high-temperature-resistant sealing glue and installed on the circular hole of the four vertical faces of the oil tank.

[0043] An insulating sleeve 7 is arranged on the top of the oil tank 1, and one end of a lead wire in the insulating sleeve 7 is connected to a test power supply, and the other end is connected to the winding 3, and the insulating sleeve 7 plays a role of insulation support.

[0044] An oil filling valve 5 is arranged on the upper part of the oil tank 1, and an oil draining valve 6 is arranged on the bottom of the oil tank 1, for realizing oil filling and oil draining; three plug-in type temperature measuring holes are reserved on the top, middle and bottom of the oil tank 1 respectively, and a thermometer 8 can be inserted into the holes and sealed by oil-resistant rubber pads and sealing glue, for measuring the temperature in the oil tank 1, and the temperature monitoring range is -10-140℃, and if the thermometer is not inserted, oil-resistant rubber plugs and sealing glue are used for sealing.

[0045] The pressure gauge 9 is selected to be a liquid pressure gauge capable of satisfying a pressure range of 100-120kPa and resisting 0-140℃, and is connected in a reserved pipeline of the oil tank 1, for detecting the internal pressure change of the test device.

[0046] (2) A moisture on-line monitoring device 10 is connected with a reserved on-line monitoring interface of the oil tank 1 through an interface pipeline, for monitoring the water content of the insulating oil in the oil tank 1 in real time;

[0047] (3) An oil chromatography on-line monitoring device 11 is connected with a reserved on-line monitoring interface of the oil tank 1 through an interface pipeline, for monitoring the gas content of methane, ethane, ethylene, acetylene, hydrogen, carbon monoxide and carbon dioxide in the insulating oil in the oil tank 1 in real time;

[0048] (4) A heating member 12 is arranged in the oil tank 1, for heating the oil sample;

[0049] In the embodiment, two heaters are arranged on the top and bottom of the oil tank 1 respectively, and a total of four heaters can slowly heat the oil sample.

[0050] (5) A vibrating member is arranged below the oil tank 1, for generating vibration of a set frequency;

[0051] In the embodiment, the oil tank 1 is placed on a platform, and the vibrating member is arranged below, so that a vibration frequency of 50-200Hz can be generated, and the vibration amplitude meets the requirement of 1-10 microns.

[0052] (6) Defect members are arranged on the iron core 2 and the winding 3 respectively, for simulating the defects of the reactor.

[0053] In this embodiment, the defective parts include a floating discharge defective part 14 and a thermal defective part 13. The floating discharge defective part 14 is placed in the winding and the clamp with a tip, a nut, a metal sheet and other defective parts to simulate the defects and faults of the internal winding processing of the reactor, floating discharge and turn-to-turn short circuit. The thermal defective part 13 is placed on the winding and the clamp with a heater, damaged insulation and other thermal defect simulation parts to simulate the local overheating defects caused by poor oil flow and damaged insulation in the internal reactor.

[0054] This embodiment can simulate the vibration defects, local overheating defects and floating discharge defects of the reactor and accumulate a large amount of defect diagnosis test data through monitoring the electrical, chemical and other characteristic quantities.

[0055] Embodiment Two

[0056] In one or more embodiments, an oil-immersed shunt reactor defect vibration simulation test method is disclosed, including the following processes:

[0057] (1) Different types of defects or faults are set through the floating discharge defective part 14 and the thermal defective part 13.

[0058] For example, the tip, nut, metal sheet and other defective parts are placed in the discharge defect reserved space of the winding and the clamp to simulate the defects and faults of the internal winding processing of the reactor, floating discharge and turn-to-turn short circuit. The heater, bare metal and other defective parts are placed in the thermal defect reserved space of the winding and the clamp to simulate the local overheating faults caused by poor oil flow and damaged insulation in the internal reactor.

[0059] (2) After the defects are set, the test voltage is applied, and the vibration device is started to simulate the operation of the reactor under the vibration environment of 50-200 Hz. The changes of various operating characteristic quantities of the reactor under the vibration condition are monitored in real time: the internal discharge and bubble generation are observed through the observation window 4; the internal pressure change data of the reactor are monitored through the pressure gauge 9; the internal temperature change data of the reactor are monitored through the thermometer 8; the partial discharge data in the internal reactor, the water content of the insulating oil in the oil tank 1 and the set gas content data of the insulating oil in the oil tank are monitored through the online monitoring device, and the set gas includes characteristic gases such as methane, ethane, ethylene, acetylene, hydrogen, carbon monoxide and carbon dioxide.

[0060] (3) If it is necessary to simulate the defect characteristic data of the reactor under different temperature conditions, the insulating oil in the internal reactor can be heated and treated through the heating part during the test.

[0061] (4) The monitored test data are collected and associated with the corresponding test conditions and operating conditions, and a defect test database is suggested for characteristic quantity extraction, database establishment and construction of a defect diagnosis model.

[0062] The above describes the specific embodiments of the present application in conjunction with the drawings, but is not a limitation on the scope of protection of the present application. Those skilled in the art should understand that various modifications or variations made by those skilled in the art on the basis of the technical solutions of the present application without creative labor are still within the scope of protection of the present application.

Claims

1. A method for simulating vibration defects in an oil-immersed shunt reactor, characterized in that, include: An oil-immersed shunt reactor defect vibration simulation test device specifically includes: an oil tank, inside which is an iron core and windings wound on the iron core; an online moisture monitoring device, connected to the oil tank via an interface pipe, for real-time monitoring of the moisture content of the insulating oil inside the oil tank; an online oil chromatography monitoring device, connected to the oil tank via an interface pipe, for real-time monitoring of the set gas content of the insulating oil inside the oil tank; a heating element, located inside the oil tank, for heating the oil sample; and a vibrating element, located below the oil tank, for generating vibration at a set frequency. By setting floating discharge defect components or thermal defect components on the windings and core, floating discharge defects or thermal defects inside the reactor can be simulated. The vibration device is activated to simulate the operation of the parallel reactor under vibration conditions, and the changes of various operating characteristic quantities of the parallel reactor under vibration conditions are monitored in real time. At the same time, the internal discharge and bubble generation are observed. The internal temperature change data, partial discharge data, water content of insulating oil in the oil tank and set gas content data of insulating oil in the oil tank are also monitored in real time.

2. The method for simulating vibration of defects in an oil-immersed parallel reactor as described in claim 1, characterized in that, During the experiment, the insulating oil inside the tank was heated by turning on the heating element to simulate the defect gas generation and discharge characteristics of the parallel reactor under different vibration and temperature conditions; at the same time, the operating characteristic quantities and defect experimental data of the parallel reactor were collected. The collected data are correlated with the defect types under the corresponding conditions to establish a defect test database.

3. A vibration simulation test device for oil-immersed shunt reactor defects, employing the vibration simulation test method for oil-immersed shunt reactor defects as described in any one of claims 1-2, characterized in that, include: An oil tank, wherein an iron core and windings wound on the iron core are provided inside the oil tank; The online moisture monitoring device is connected to the oil tank via an interface pipe and is used to monitor the moisture content of the insulating oil inside the oil tank in real time. Online oil chromatography monitoring is connected to the oil tank via an interface pipe and is used to monitor the set gas content of the insulating oil inside the oil tank in real time. A heating element, located inside the oil tank, is used to heat the oil sample; The vibrating element, located below the oil tank, is used to generate vibration at a set frequency; Defective components are installed on the core and windings respectively to simulate defects in the reactor.

4. The oil-immersed parallel reactor defect vibration simulation test device as described in claim 3, characterized in that, The top of the oil tank is equipped with an insulating sleeve, and one end of the lead wire inside the insulating sleeve is connected to the test power supply, and the other end is connected to the winding.

5. The oil-immersed parallel reactor defect vibration simulation test device as described in claim 3, characterized in that, The oil tank is equipped with insertion-type temperature measurement holes on its top, bottom, and sides.

6. The oil-immersed parallel reactor defect vibration simulation test device as described in claim 3, characterized in that, The oil tank is equipped with a reserved pipe for monitoring the internal pressure of the oil tank.

7. The oil-immersed parallel reactor defect vibration simulation test device as described in claim 3, characterized in that, The oil tank is equipped with observation windows on its vertical surface.

8. The oil-immersed parallel reactor defect vibration simulation test device as described in claim 3, characterized in that, The oil tank is equipped with an oil filling valve at the top and an oil drain valve at the bottom.

9. The oil-immersed parallel reactor defect vibration simulation test device as described in claim 3, characterized in that, The defective component includes a floating discharge defect component, which is used to simulate internal winding processing defects, floating discharge, and inter-turn short circuit defects in the reactor.

10. The oil-immersed parallel reactor defect vibration simulation test device as described in claim 3, characterized in that, The defective component includes a thermal defect component, which is used to simulate local overheating defects caused by poor oil flow and insulation damage inside the reactor.

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