CN109390130B - Method for detecting and identifying misoperation of oil flow relay of locomotive traction transformer - Google Patents
Method for detecting and identifying misoperation of oil flow relay of locomotive traction transformer Download PDFInfo
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- CN109390130B CN109390130B CN201710664401.0A CN201710664401A CN109390130B CN 109390130 B CN109390130 B CN 109390130B CN 201710664401 A CN201710664401 A CN 201710664401A CN 109390130 B CN109390130 B CN 109390130B
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- oil
- relay
- transformer
- oil flow
- flow relay
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
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- 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
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
- G01R31/3278—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches of relays, solenoids or reed switches
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
- H01F2027/404—Protective devices specially adapted for fluid filled transformers
Abstract
The invention provides a method for detecting and identifying the misoperation of an oil flow relay of a locomotive traction transformer, which can effectively detect and identify the misoperation of the oil flow relay of the electric locomotive traction transformer. At present, the traction transformer of the electric locomotive carries out cooling oil circulation through an oil pump, an oil flow relay is used for detecting the running condition of transformer oil, the oil flow relay transmits abnormal signals when the transformer oil runs abnormally, but in recent years, the locomotive running in a low-temperature environment frequently has the condition of misoperation of the oil flow relay, and the normal operation of the locomotive is greatly influenced. In order to effectively solve the problem, in the embodiment, a current relay is added in a power supply loop of an oil pump of a locomotive traction transformer, and a setting threshold value of the current relay is adjusted, so that the monitoring of the oil pump and the identification of the misoperation of the current relay are realized.
Description
Technical Field
In the world, the electric locomotive has already advanced from the direct current transmission era to the alternating current transmission era, and the electric locomotive is also moved to the high-speed heavy-load stage, thus achieving unprecedented development. The traction transformer of the electric locomotive is an important component of the electric locomotive and is the first link and important guarantee for realizing the electric performance of the locomotive.
The invention provides a method for detecting and identifying misoperation of an oil flow relay of a locomotive traction transformer, wherein the traction transformer of an electric locomotive circulates cooling oil through an oil pump, the oil flow relay is used for detecting the running condition of the transformer oil, and the oil flow relay transmits an abnormal signal when the transformer oil runs abnormally. In order to effectively solve the problem, in the embodiment, a current relay is added in a power supply loop of an oil pump of a locomotive traction transformer, and a setting threshold value of the current relay is adjusted, so that the monitoring of the oil pump and the identification of the misoperation of the current relay are realized.
Background
The locomotive traction transformer is an important part on an electric locomotive, is used for converting 25 kV high-voltage obtained on a contact network into voltage suitable for the traction converter to work, has the same working principle as a common power transformer, but has the characteristics of frequent mechanical impact vibration, large contact network fluctuation and the like, so that the locomotive traction transformer puts forward higher requirements on heat dissipation.
The electric locomotive traction transformer carries out cooling oil circulation through the oil pump, and the oil flow relay is then used for detecting the operating condition of transformer oil, and when transformer oil appeared the abnormal operation, the oil flow relay will transmit abnormal signal, but in recent years, the condition of oil flow relay malfunction had frequently appeared in the locomotive of operation under the low temperature environment, had greatly influenced the normal operation of locomotive.
Disclosure of Invention
The invention provides a method for detecting and identifying misoperation of an oil flow relay of a locomotive traction transformer, which comprises the following steps:
101. an oil flow relay is added in a power supply loop of an oil pump of a traction transformer of the electric locomotive;
102. the oil flow relay chamber is connected in series inside an oil pipe of the transformer cooling system, and the blades of the oil flow relay are driven by oil flowing in the oil pipe of the transformer to move;
103. judging whether the oil flow condition is normal or not according to the action state of the blade, when the action of the blade of the oil flow relay is abnormal, indicating that the oil flow of the transformer is abnormal, and triggering a fault signal to perform fault protection on the transformer;
104. and according to the fault of the oil flow relay or the fault of the current relay, the state information of the control unit is displayed differently.
The oil flow relay of the locomotive traction transformer is installed on a power supply loop of a transformer oil pump and comprises a blade and a control unit.
The method comprises the steps of setting a setting value of an oil flow relay added in a power supply loop of the transformer oil pump to monitor the current of the traction transformer oil pump, confirming the rotating direction of the oil pump, and giving a fault alarm after delaying for 5 seconds under the condition that the oil pump is blocked or overloaded for a long time.
Furthermore, the identification and elimination of the misoperation of the oil flow relay are achieved through the logic judgment of the state information of the control unit.
Drawings
Fig. 1 is a flow chart of a method for detecting and identifying malfunction of an oil flow relay of a locomotive traction transformer provided by the invention.
Fig. 2 is a use effect diagram of the method for detecting and identifying the malfunction of the oil flow relay of the locomotive traction transformer provided by the invention.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The invention provides a method for detecting and identifying misoperation of an oil flow relay of a locomotive traction transformer, wherein the traction transformer of an electric locomotive circulates cooling oil through an oil pump, the oil flow relay is used for detecting the running condition of the transformer oil, and the oil flow relay transmits an abnormal signal when the transformer oil runs abnormally.
Fig. 1 is a flow chart of a method for detecting and identifying malfunction of an oil flow relay of a locomotive traction transformer provided by the invention. Fig. 2 is a use effect diagram of the method for detecting and identifying the malfunction of the oil flow relay of the locomotive traction transformer provided by the invention. As shown in fig. 1 and 2, in order to effectively solve the problem,
102, connecting an oil flow relay chamber in series inside an oil pipe of a transformer cooling system, and driving a blade of an oil flow relay through oil flowing in the oil pipe of the transformer to enable the blade to act;
and 103, judging whether the oil flow condition is normal or not by the oil flow relay according to the action state of the blade, indicating that the transformer oil flows abnormally when the action of the blade of the oil flow relay is abnormal, and triggering a fault signal to perform fault protection on the transformer. However, in winter, when the temperature is low, the oil flow relay is likely to malfunction.
And 104, controlling the state information display of the control unit to be different according to the fault of the oil flow relay or the fault of the current relay.
Specifically, the invention realizes the monitoring of the oil pump current of the traction transformer by setting the setting value of the current relay of the oil pump of the transformer, confirms the rotation direction of the oil pump, and carries out fault alarm after delaying for 5 seconds under the condition of oil pump blockage or long-time overload.
The following table is the introduction of detection logic, in the table, state 0 is a no-alarm state, and 1 is the detection of a corresponding alarm signal.
The method for detecting and identifying the misoperation of the oil flow relay of the locomotive traction transformer is characterized in that the oil flow relay is additionally arranged in a power supply loop of an oil pump of the electric locomotive traction transformer, so that the misoperation of the oil flow relay of the transformer is detected. The false action of the oil flow relay is identified by adjusting the action threshold of the current relay. The false action of the oil flow relay is identified and eliminated through the logic judgment of the control unit. Ensuring the normal operation of the locomotive.
The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the invention should fall within the protection scope of the invention.
Claims (3)
1. A method for detecting and identifying misoperation of an oil flow relay of a locomotive traction transformer is characterized by comprising the following steps:
101. a current relay is added in a power supply loop of an electric locomotive traction transformer oil pump;
102. the oil flow relay chamber is connected in series inside an oil pipe of the transformer cooling system, and the blades of the oil flow relay are driven by oil flowing in the oil pipe of the transformer to move;
103. judging whether the oil flow condition is normal or not according to the action state of the blade, when the action of the blade of the oil flow relay is abnormal, indicating that the oil flow of the transformer is abnormal, and triggering a fault signal to perform fault protection on the transformer;
104. according to the fault of the oil flow relay or the fault of the current relay, the state information of a control unit is displayed differently, the current relay is used for monitoring the current of the transformer, and the false action of the oil flow relay is identified by adjusting the action threshold value of the current relay;
the method comprises the steps that a setting value of a current relay added in a power supply loop of the transformer oil pump is set, so that the current of the traction transformer oil pump is monitored, the rotating direction of the oil pump is confirmed, and when the oil pump is blocked or overloaded for a long time, fault alarm is carried out after 5 seconds of delay; through the logic judgment of the state information of the control unit, the identification and elimination of the misoperation of the oil flow relay are achieved.
2. The method for detecting and identifying the malfunction of the oil flow relay of the locomotive traction transformer of claim 1, wherein the method relates to a locomotive transformer, a cooling tower, an oil pump and a current relay of a locomotive; control unit and auxiliary converter.
3. The method of claim 1, wherein the oil flow relay comprises a blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710664401.0A CN109390130B (en) | 2017-08-04 | 2017-08-04 | Method for detecting and identifying misoperation of oil flow relay of locomotive traction transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710664401.0A CN109390130B (en) | 2017-08-04 | 2017-08-04 | Method for detecting and identifying misoperation of oil flow relay of locomotive traction transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109390130A CN109390130A (en) | 2019-02-26 |
| CN109390130B true CN109390130B (en) | 2021-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710664401.0A Active CN109390130B (en) | 2017-08-04 | 2017-08-04 | Method for detecting and identifying misoperation of oil flow relay of locomotive traction transformer |
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| CN (1) | CN109390130B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111141982A (en) * | 2020-01-02 | 2020-05-12 | 中车青岛四方机车车辆股份有限公司 | Traction transformer oil flow abnormal fault detection device and method |
| CN112630637B (en) * | 2020-11-20 | 2023-05-30 | 国网山东省电力公司青岛供电公司 | Online checking system and method for gas relay of power transformer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202837861U (en) * | 2012-07-29 | 2013-03-27 | 中国北车集团大连机车车辆有限公司 | Oil flow monitoring apparatus of electric locomotive transformer |
| CN205622208U (en) * | 2016-05-10 | 2016-10-05 | 国家电网公司 | Distribution transformer transships early warning device |
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- 2017-08-04 CN CN201710664401.0A patent/CN109390130B/en active Active
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| CN109390130A (en) | 2019-02-26 |
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Address after: 037038 No.1 Qianjin Street, Pingcheng District, Datong City, Shanxi Province Applicant after: CRRC DATONG Co.,Ltd. Address before: 037038 No. 1 Qianjin Street, Shanxi, Datong Applicant before: CRRC DATONG Co.,Ltd. |
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