Sub-station

The common malfunction and the reason analysis - battery operation

by:KEBO      2020-04-28
For the failure of substation operation process of battery performance may in-situ float charging too high/low pressure, internal resistance is big, mild sulfide, shell deformation, filtration, drainage, etc. , and failure of battery has often shown as the following three conditions: 1, the battery capacity can not meet the nominal capacity at work, the emergence of serious individual battery discharge starting to limit. Full battery capacity lack, and issues can be solved through capacity or resistance online testing methods such as found in a timely manner. 2, battery capacity output, individual battery open circuit state. Substation system failure caused by ac power failure, if the battery failure at this moment, dc disappear within the substation protection, high frequency protection maloperation, or current differential protection may be serious consequences. 3, long-term floating condition of short circuit phenomenon in a storage battery, a short circuit batteries, often may produce thermal runaway phenomenon. According to analysis of numerous data and field experience, cause the failure reasons of failure and may have mostly in peacetime maintenance does not reach the designated position, analysis the battery failure reason mainly includes the following: 1, acid salinization. When the battery for a long time in the under charge, float charging voltage on the low side, failed to supply electricity, after discharge the battery to put aside for a long time don't have to wait for a circumstance, the cathode can form a thick hard lead sulfate, it almost does not dissolve. If the battery fluid loss serious, makes the sulfuric acid concentration is too high, also would lead to fast generation of lead sulfate. Saline direct consequence is the battery capacity lack, even the battery open circuit. 2, water loss. Water is the common fault of battery failure. Gas combined low efficiency, water seepage from the battery shell and plate grid corrosion and self-discharge will cause the battery water loss. Most of the current valve control type sealed lead acid battery capacity decline reasons, are caused by battery water loss. Usually think when water loss of more than 15%, the battery failure. 3, board gate corrosion and deformation. Board gate corrosion is one of the important factors of limited battery life. In lead-acid battery, the positive plate gate thicker than the negative plate grid, one reason is that the battery when charging, especially under the condition of charging, positive plate gate to corrode, gradually oxidized and lose the role of the sheeting. Content and increasing volume, can make the serious bending plate. 4, active material softening. Type to type B. Type B grain is relatively small, bonding force is bad, lead to active substances of the grid structure is weakened, and ultimately active material softening off ( Also known as the mud) , causing the battery failure.
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