CN211670066U - All-weather high-precision insulating gas on-line monitoring converter transformer sleeve - Google Patents
All-weather high-precision insulating gas on-line monitoring converter transformer sleeve Download PDFInfo
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- CN211670066U CN211670066U CN202020486555.2U CN202020486555U CN211670066U CN 211670066 U CN211670066 U CN 211670066U CN 202020486555 U CN202020486555 U CN 202020486555U CN 211670066 U CN211670066 U CN 211670066U
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Abstract
The utility model discloses an all-weather high-precision insulating gas on-line monitoring converter transformer sleeve, a flange in the middle of the sleeve is connected with a lifting seat of a converter transformer, two insulating gas self-locking valves are arranged on one side of a flange in the middle of a valve side sleeve, each insulating gas self-locking valve is respectively connected to a respective gas communication valve group through a respective gas pressure conduction pipe, and a gas density controller is arranged on each gas communication valve group; the insulating gas self-locking valves, the gas pressure conducting pipe, the gas density controller and the gas communication valve group are arranged in parallel, each gas communication valve group is provided with a charging and discharging valve, the gas communication valve group and the gas density controller are both arranged in a protective box, and the protective box is arranged at a position where the vibration influence of the transformer can be avoided. The utility model discloses can effectively avoid operation and natural environment to the damage and the harmful effects that monitoring facilities and monitoring result brought, avoid monitoring facilities self problem and wrong report.
Description
Technical Field
The utility model relates to a transformer bushing specifically is an all-weather high accuracy insulating gas on-line monitoring current conversion transformer bushing.
Background
Due to the special character of unmatched distribution of energy and electricity load centers in China, in recent years, extra-high voltage direct current transmission projects with obvious advantages in long-distance transmission projects are vigorously developed and applied, more than twenty direct current transmission lines which are put into operation and built in China at present play an important role in national economic development. The converter transformer serving as the most important primary equipment has an irreplaceable position in a direct-current transmission project, and meanwhile, due to the particularity of a direct-current transmission technology, the converter transformer and core group components thereof are more complex than alternating-current transmission equipment of the same type, and the requirement on the operation reliability is higher. As a core component of the converter transformer, the valve-side dc bushing is mostly of a silicone rubber composite insulation dry capacitor type, and SF6 insulation gas with a certain pressure is filled inside the valve-side dc bushing. The accurate monitoring of the internal SF6 gas state of the valve side direct current bushing is of great significance to the safe operation of the converter transformer and the whole power transmission system. This effect is mainly reflected in two aspects: firstly, when the sleeve is used as an electrical component for bearing high voltage and large current and has sealing failure or internal overheating and other abnormalities, the SF6 gas state changes, if the abnormality cannot be found in time or a large error exists in SF6 state monitoring, the problem cannot be found in time, insulation damage even discharge and explosion accidents occur, and further peripheral equipment is influenced, so that a larger accident is caused; and secondly, the valve side direct current sleeve is not only a core component of the converter transformer, but also directly forms electrical connection with the converter valve, when the transformer or the converter valve main body has some abnormal states, the change of parameters such as insulating gas pressure in the sleeve can visually reflect the problem property of related equipment, the abnormal signal is transmitted to the operation and maintenance system in time, and accurate fault judgment is obtained so as to prevent more serious problems from occurring. And traditional converter transformer valve side direct current sleeve pipe does not possess SF6 insulating gas on-line monitoring function or only installs the simple and easy not high gas pressure gauge of precision on the sleeve pipe body, and to a great extent can't satisfy the monitoring requirement of modern power system to equipment running state for direct current transmission system has the potential safety hazard.
The hidden installation troubles are mainly embodied in the following aspects: (1) the on-line monitoring device of the insulating gas is not configured, so that the monitoring of the running states of the sleeve and equipment such as a converter transformer related to the sleeve is in an out-of-control state; (2) when the converter transformer operates, the equipment can vibrate continuously due to hysteresis expansion of an iron core, operation of cooling equipment and the influence of electrodynamic force or other vibration factors in the nature, and the vibration is amplified to a more serious degree when being transmitted to a sleeve with a cantilever load; the SF6 gas pressure gauge arranged on the sleeve body has larger error in the monitoring result of the gauge due to the vibration state of the equipment in operation, and the vibration can also cause the adverse effect of easy damage to the gauge; (3) because the converter transformer equipment is high and the monitoring result is generally checked in an electrified state, the SF6 meter arranged on the body has potential safety hazards of ascending a height, electric shock and the like for operation and maintenance personnel when the result is checked; (4) converter transformer and sleeve pipe belong to outdoor work equipment, and equipment and install the instrument and meter on the equipment body can receive natural climate influences such as sunlight insolate, sleet severe cold.
In summary, it is important to develop a valve side dc bushing capable of accurately monitoring the state of the internal SF6 insulating gas and providing a judgment basis for an operation and maintenance system for the safe operation of a dc power transmission system, especially an extra-high voltage system.
SUMMERY OF THE UTILITY MODEL
To the equipment state monitoring error that arouses because above-mentioned factor probably leads to sleeve pipe itself and other relevant equipment to break down the judgement error among the prior art, causes to discharge or even explosion fire accident or because the alert impaired current situation of economy that leads to of wrong report, the to-be-solved technical problem of the utility model is to provide an all-weather high accuracy insulating gas on-line monitoring current conversion transformer bushing to the inside SF6 insulating gas pressure state of sleeve pipe.
In order to solve the technical problem, the utility model discloses a technical scheme is:
the utility model provides an all-weather high accuracy insulating gas on-line monitoring converter transformer sleeve pipe is connected its characterized in that through the rising seat of sleeve pipe middle part flange with converter transformer: two insulating gas self-locking valves are arranged on one side of a flange in the middle of the valve side sleeve, each insulating gas self-locking valve is connected to a respective gas communication valve group through a respective gas pressure conducting pipe, and a gas density controller is installed on each gas communication valve group.
The gas communication valve group is provided with two self-sealing interfaces, one self-sealing interface is provided with a gas density controller, and the other self-sealing interface is provided with a charging and discharging valve.
The signal line of the gas density controller is connected with the control device of the remote electric power system operation and maintenance control area through a transmission line.
The insulating gas self-locking valves, the gas pressure conducting pipe, the gas density controller and the gas communication valve group are arranged in parallel, each gas communication valve group is provided with a charging and discharging valve, the gas communication valve group and the gas density controller are both arranged in a protective box, and the protective box is arranged at a position where the vibration influence of the transformer can be avoided.
The utility model has the following beneficial effects and advantages:
1. the utility model conducts the air pressure to the position with ideal monitoring environment by using the stainless steel wire armored full stainless steel inner wall gas pressure conduction pipe, monitors the state of the insulating gas by using the precision instrument, and can effectively avoid the damage and the adverse effect of the operation and the natural environment on the monitoring equipment and the monitoring result;
2. the utility model relates to a change of current transformer valve side direct current sleeve pipe has two sets of insulating gas teletransmission monitoring devices that have digit and analog signal output function, can realize real-time on-line monitoring and export the monitoring result to the control room with the pattern of signal of telecommunication when the instrument body shows to the density or the operating pressure of the insulating gas in the sleeve pipe inside, two sets of monitoring devices monitoring results can form differentiation contrast, provide the analysis foundation for the fortune dimension system, avoid the wrong report police that takes place because of monitoring facilities self problem;
3. the utility model discloses set up monitoring devices in the good monitoring environment after the teletransmission, and monitoring facilities department has disposed protector (guard box), protector has the corrosion resistant plate protective housing, and the inside can dispose temperature, humidity control device according to concrete service environment, can prevent effectively that natural environment such as thunderstorm erosion, sunshine intensification from to the injury of instrument, makes monitoring work can be carried on continuously, accurately;
4. great to converter transformer capacity, equipment is higher, and the sleeve pipe as insulating part is many to be located higher position etc, the utility model discloses communicate the inside insulating gas of sleeve pipe to lower position with the air duct, can be convenient for to monitoring result or fill gassing operation, avoid owing to ascend a height and the potential safety hazard that the live operation brought for the fortune dimension personnel.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein, 1 is valve side sleeve pipe, 2 is sleeve pipe middle part flange, 3 is insulating gas auto-lock valve, 4 are gas pressure conduction pipe, 5 are gas density controller, 6 are the guard box, 7 are gas intercommunication valves, 8 are the valve of filling and discharging, 9 are output line, 10 are power system operation and maintenance control area.
Detailed Description
The invention will be further explained with reference to the drawings attached to the specification.
As shown in fig. 1, the utility model provides an all-weather high accuracy insulating gas on-line monitoring current conversion transformer sleeve pipe, through sleeve pipe middle part flange 2 with the rising seat of current conversion be connected, 2 one sides of sleeve pipe middle part flange are equipped with two insulating gas self-locking valve 3, each insulating gas self-locking valve 3 connects to respective gaseous intercommunication valves 7 through respective gas pressure conduction pipe 4 respectively, installs gas density controller 5 on each gaseous intercommunication valves 7.
The gas communicating valve group 7 is provided with two self-sealing interfaces, one self-sealing interface is provided with a gas density controller 5, and the other self-sealing interface is provided with a charging and discharging valve 8.
The signal line of the gas density controller 5 is connected with the operation and maintenance control device of a remote power system 10 through a transmission line 9.
The insulation gas self-locking valve 3, the gas pressure conducting pipe 4, the gas density controller 5 and the gas communication valve group 7 are arranged in parallel, each gas communication valve group 7 is provided with a gas charging and discharging valve 8, the gas communication valve group 7 and the gas density controller 5 are both arranged in the protection box 6, and the protection box 6 is arranged on the ground or a support frame which is slightly interfered by the vibration of the transformer.
In the embodiment, a valve side sleeve 1 arranged on a converter transformer adopts a dry capacitive structure, SF6 insulating gas with certain pressure is filled in the sleeve, a middle flange 2 of the sleeve is in good mechanical connection with a valve side lifting seat of the converter transformer during working, and the upper end of the valve side sleeve 1 extends into a valve hall of the converter station and is electrically connected with converter valve equipment;
2 insulating gas self-locking valves 3 are arranged on a flange 2 in the middle of the sleeve, and after the insulating gas self-locking valves 3 are connected with a gas pressure conduction pipe 4, the insulating gas self-locking valves 3 can be automatically opened, and insulating gas in the sleeve is communicated with the inside of the gas pressure conduction pipe 4;
in order to ensure that the density and pressure signals of the monitored gas are not distorted, the gas pressure conducting pipe 4 is made of stainless steel wire armored full stainless steel inner wall material and can bear a pressure test within the full pressure range from 100Pa to 4MPa, two ends of the gas pressure conducting pipe are respectively in good sealing connection with the insulating gas self-locking valve 3 and the gas communication valve group 7, the length of the gas pressure conducting pipe can be determined according to the actual engineering requirement, and the gas pressure conducting pipe can guide the gas density controller 5 to a good environment position which does not influence the working state of the gas density controller to be a lower limit value of the length;
the gas communication valve group 7 connected with the gas pressure conduction pipe 4 is provided with another two insulated gas self-sealing interfaces, wherein 1 interface is used for installing the gas density controller 5, and the other 1 interface is connected with the charging and discharging valve 8, so that the increase and decrease operation of the insulated gas in the sleeve can be realized;
the monitoring result of the gas density controller 5 can be displayed on a display screen of the controller, and can be output to a control device of an operation and maintenance control area 10 of the power system in a digital and analog electric signal mode through an output line 9;
insulating gas auto-lock valve 3, gas pressure conduction pipe 4, gas density controller 5, gaseous intercommunication valves 7, fill gassing valve 8 and output line 9 overall configuration two sets, gaseous intercommunication valves 7 of terminal part and gas density controller 5 are all installed in guard box 6, guard box 6 adopts the sufficient corrosion resistant plate preparation of intensity, it is good waterproof to have, ventilation function, and can make 2 groups, gaseous intercommunication valves 7, gas density controller 5 obtains firm installation, can ensure that each part work is under good ambient condition in the insulating box, insulating gas monitoring result is accurate, can not receive external condition interference.
Two sets of gas conduction and monitoring devices (gas density controllers 5) can simultaneously output results for monitoring and analysis by an operation and maintenance system, and errors such as false alarms caused by equipment faults can be effectively avoided;
in the utility model, the conduction of the density and pressure parameters of the insulating gas inside the sleeve is realized in the form of gas, and the nondestructive transmission for ensuring that the characteristic parameters of the gas after remote transmission cannot be distorted is realized by combining the conduction path form of the stainless steel wire armored full stainless steel inner wall gas pressure conduction pipe;
the protection box 6 adopts an all-weather precision instrument protection box, has the functions of protecting precision instrument equipment such as rain and snow prevention, sand prevention, good heat dissipation conditions, good signal shielding function and the like, and has the functions of an instrument viewing window, a remote transmission signal leading-out interface and the like.
Two sets of insulating gas pressure on-line monitoring devices are configured on the valve side sleeve 2, and gas pressure parameters of the sleeve body are remotely transmitted to the position of the gas pressure monitoring device in 2 ways by using the gas pressure transmission pipe 4, so that adverse effects of various vibrations on instruments and output results in the operation of the converter transformer can be effectively avoided; the environment protection of the monitoring device and the supplement and the deflation of the insulating gas of the sleeve body can be realized by using the device protection box and the multifunctional valve group, the output results of the two sets of devices can provide a differentiated analysis basis for the operation and maintenance system, and further the occurrence of judgment errors and power transmission accidents caused by the faults of the instrument can be avoided.
The utility model discloses the monitoring method that all-weather high accuracy insulating gas on-line monitoring current conversion transformer bushing adopted includes following step:
1) transferring the monitoring instrument from the transformer body to an environment without external interference outside the transformer body;
2) the traditional electric signal transmission is changed into gas pressure signal transmission;
3) adopts two-way signal monitoring, the monitoring signal is transmitted to a remote control device to form contrast and error complementation
4) Software running in the remote control device is used for carrying out differentiation analysis, so that judgment errors and power transmission accidents caused by faults of the instrument are avoided.
In this embodiment, the environment outside the transformer body without external interference is selected to be 5 meters away from the transformer foundation, and the protection box 6 is installed on the ground through the bracket or the foundation.
In the step 2), the traditional electric signal transmission is changed into gas pressure signal transmission, and the insulating gas pressure or density parameter transmission path adopts a stainless steel wire armored full stainless steel inner wall gas pressure transmission pipe with pressure lossless transmission capacity to carry out parameter transmission on the insulating gas, and specifically comprises the following steps: two insulating gas self-locking valves 3 are arranged on one side of a flange in the middle of the valve side sleeve, each insulating gas self-locking valve 3 is connected to a respective gas communication valve group 7 through a respective gas pressure conduction pipe 4, and a gas density controller 5 is installed on each gas communication valve group 7.
The adoption of two-way signal monitoring means that two sets of the insulating gas self-locking valve 3, the gas pressure conducting pipe 4, the gas density controller 5 and the gas communication valve group 7 are arranged in parallel, each gas communication valve group 7 is respectively provided with a charging and discharging valve 8, and the gas communication valve group 7 and the gas density controller 5 are both arranged in the protection box 6.
And 4) performing differentiation analysis by software running in the remote control device in the step 4), and realizing by adopting the existing analysis software.
The utility model transfers the instrument from the traditional installation position (transformer body) to an environment without external interference, improves the traditional electric signal transmission into the gas pressure signal transmission, and adopts two-way signal monitoring, thus forming contrast and error complementation; a protective box is added to reduce the influence of the environment on the instrument.
The utility model discloses well change of current transformer valve side direct current sleeve pipe has two sets of insulating gas teletransmission monitoring devices who has digit and analog signal output function, can realize real-time on-line monitoring and export the monitoring result with the pattern of signal of telecommunication for remote control device in the instrument body demonstration to the density or the operating pressure of the inside insulating gas of sleeve pipe, two sets of monitoring devices monitoring results can form the differentiation contrast, for fortune dimension system provides the analysis foundation, avoid the wrong report because of monitoring facilities self problem takes place, can effectively promote the operational reliability of direct current transmission system at to a great extent.
Claims (4)
1. The utility model provides an all-weather high accuracy insulating gas on-line monitoring current conversion transformer bushing, is connected with the rising seat of current conversion transformer through sleeve pipe middle part flange which characterized in that: two insulating gas self-locking valves are arranged on one side of a flange in the middle of the valve side sleeve, each insulating gas self-locking valve is connected to a respective gas communication valve group through a respective gas pressure conducting pipe, and a gas density controller is installed on each gas communication valve group.
2. The all-weather high-precision insulating gas on-line monitoring converter transformer bushing of claim 1, characterized in that: the gas communication valve group is provided with two self-sealing interfaces, one self-sealing interface is provided with a gas density controller, and the other self-sealing interface is provided with a charging and discharging valve.
3. The all-weather high-precision insulating gas on-line monitoring converter transformer bushing of claim 1, characterized in that: the signal line of the gas density controller is connected with the control device of the remote electric power system operation and maintenance control area through a transmission line.
4. The all-weather high-precision insulating gas on-line monitoring converter transformer bushing of claim 1, characterized in that: the insulating gas self-locking valves, the gas pressure conducting pipe, the gas density controller and the gas communication valve group are arranged in parallel, each gas communication valve group is provided with a charging and discharging valve, the gas communication valve group and the gas density controller are both arranged in a protective box, and the protective box is arranged at a position where the vibration influence of the transformer can be avoided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020486555.2U CN211670066U (en) | 2020-04-07 | 2020-04-07 | All-weather high-precision insulating gas on-line monitoring converter transformer sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020486555.2U CN211670066U (en) | 2020-04-07 | 2020-04-07 | All-weather high-precision insulating gas on-line monitoring converter transformer sleeve |
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| CN211670066U true CN211670066U (en) | 2020-10-13 |
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| CN202020486555.2U Active CN211670066U (en) | 2020-04-07 | 2020-04-07 | All-weather high-precision insulating gas on-line monitoring converter transformer sleeve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113257524A (en) * | 2021-05-10 | 2021-08-13 | 山东电力设备有限公司 | Gas collection prevention device and method for extra-high voltage reactor lifting seat |
-
2020
- 2020-04-07 CN CN202020486555.2U patent/CN211670066U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113257524A (en) * | 2021-05-10 | 2021-08-13 | 山东电力设备有限公司 | Gas collection prevention device and method for extra-high voltage reactor lifting seat |
| CN113257524B (en) * | 2021-05-10 | 2022-08-16 | 山东电力设备有限公司 | Gas collection preventing method for extra-high voltage reactor lifting seat |
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