Nuclear power station transformer gas relay seismic test method
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An anti-seismic test and relay technology, applied in the field of power transformers, can solve problems affecting the availability of transformers, misoperation of gas relays, tripping of transformers, etc.
Inactive Publication Date: 2014-05-21
CHINA GENERAL NUCLEAR POWER CORP +1
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[0003] When the transformer is subjected to external through-circuit short-circuit current or no-load impact, the Buchholz relay may be affected by the overall vibration of the transformer, or it may be directly subjected to vibrati...
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Embodiment 1
[0020] Tested object: German TU DR80, double cylinder float type, dry reed contact
[0021] Its heavy gas action principle is to connect the oil flow in the pipe to the connection baffle of the heavy gas float, the connection baffle drives the heavy gas float down, and the dry reed contact in the float closes to connect the heavy gas protection circuit.
[0022] Test Results:
[0023] Frequency sweep test:
[0024]
[0025] Fixed frequency test: pass
Embodiment 2
[0027] Test object: UK P & B Weir 3DE / HF2, double float type, mercury contact
[0028] The principle of its heavy gas action is that the oil flow hits the baffle on the floating block, and the baffle drives the mercury contact in the floating block to connect the heavy gas tripping circuit.
[0029] Test Results:
[0030] Frequency sweep test:
[0031]
[0032] Fixed frequency test: pass
Embodiment 3
[0034] Test object: domestic QJ-80, spring baffle type, dry reed contact
[0035] The principle of its heavy gas action is that the oil flow impacts the baffle, and the baffle drives the inner contact of the reed switch to attract with the magnet to connect the heavy gas tripping circuit.
[0036] Test Results:
[0037] Frequency sweep test:
[0038]
[0039] Fixed frequency test:
[0040] Due to the different structures of gas relays, there is no uniform standard for shock resistance of gas relays in the world, and the vibration standards provided by various gas relay manufacturers are different:
[0041] Domestic gas relay (only applicable to QJ series gas relay with magnet baffle type and reed contact structure): comply with the national standard: 4~20Hz, acceleration 4g;
[0042] Germany EMB (double floating ball type, reed contact): 2~200Hz, the acceleration is 2g;
[0043] German TU (double cylinder float type, reed contact): 5 ~ 15Hz, the acceleration is 2g;
[...
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Abstract
The invention discloses a nuclear power station transformer gas relay seismic test method which includes the following process: conducting frequency conversion test which includes that relays are filled with transformer oil, an indication device is connected at a tripping point and arranged on a vibration table with the vibration test frequency as 8-20Hz sweep frequency, the frequency is maintained for 1 minute respectively on the X axis, the Y axis and the Z axis, the acceleration is over 0.25g, and an indication result of the indication device is recorded. By means of the nuclear power station transformer gas relay seismic test method, the anti-seismic performance of gas relays of various types is tested and evaluated, and the method can provide support for type selection of the transformer gas relays. Due to the fact that the gas relays are installed on a transformer, it is unreasonable to put forward an anti-seismic requirement or standard from the view point of the gas relays singly, and the anti-seismic requirement is put forward from the view point of the whole transformer. On the type selection of the transformer gas relays, the production safety requirement can be met as long as the anti-seismic parameters are not lower than the anti-seismic requirement of a main body transformer.
Description
【Technical field】 [0001] The invention relates to a power transformer, in particular to a gas relay therein. 【Background technique】 [0002] The gas relay is one of the important components in the non-electrical protection of power transformers. It is generally installed between the transformer body or the on-load tap-changer and the oil conservator. When a fault occurs inside the transformer body or on-load tap-changer, gas or rapid oil When the current surges, the gas relay acts through the light and heavy fault contacts to connect the designated control circuit, and send a signal in time or automatically cut off the transformer. [0003] When the transformer is subjected to external through-circuit short-circuit current or no-load impact, the Buchholz relay may be affected by the overall vibration of the transformer, or it may be directly subjected to vibration under the action of an external force such as an earthquake, which may cause the Buchholz relay to malfunction, ...
Claims
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