Photovoltaic power matrix installation in the technical aspects need to pay attention to points (|||)
When the utility grid is disconnected, the grid side is equivalent to a short-circuit state, at which time the inverter running in grid-connected operation will be automatically protected due to overload. When the microprocessor detects the overload, in addition to blocking the SPWM signal, it will also disconnect the circuit breaker connected to the grid, at which time the inverter will operate in the single-run state if the solar cell array has energy output. The microprocessor detects the inverter output voltage and compares it with the reference voltage (usually 220V), and then controls the PWM output duty cycle to achieve inverter and voltage regulator operation.
Of course, the premise of single operation is that the solar array can provide sufficient power at that time. If the load is too large or the sunshine conditions are poor, the inverter cannot output enough power and the terminal voltage of the solar cell array will drop, thus lowering the output AC voltage and entering the low-voltage protection state. When power is restored to the grid, it will automatically switch to the feed-back state.
Photovoltaic mounts are now widely used in solar energy, but regardless of the performance of the equipment, there are always factors that affect its normal use and application safety, so this type of equipment is no exception. The following factors are introduced to you.
A, the application of the bracket safety factor
1. PV bracket is an indispensable part of the solar PV system, and its strong support function is very important.
2. All brackets must be fully assembled in accordance with the delineated scheme plan, so any bracket must be assembled at will to destroy the original stability of the city.
3. Please do not assemble any parts on the product at will, not to mention damaging them, but often stop briefly and replace or dispose of them if there is a problem, and avoid all influencing factors.
4. When using, only fixed bracket can ensure the safety of the equipment. Therefore, attention to many details is inseparable, otherwise the safety of the use of the bracket will also be affected.
5. Do a good job of cleaning the bracket and do not let any debris enter. After safe installation, you cannot move it at will. If there is a requirement, the operation must be stopped after the relevant signal is withdrawn.
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