PV Inverter Power Allocation for Uneven Module Capacity
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Solution Overview
Problem
Existing inverter systems experience significant losses in active power generation due to uneven installation of photovoltaic modules, leading to inefficiencies in power allocation.
Innovation Solution
A power allocation method that considers the overload power and capacity ratio of each inverter, adjusting initial active power allocations to maximize output based on the capacity ratio and overload capacity, ensuring optimal power generation even with uneven module installations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If equal power allocation is used, then the power allocation is simple, but there is a large loss of active power generation when photovoltaic modules are unevenly installed
Solution Approach 1:
The patent applies local quality by allocating power to each inverter based on its specific photovoltaic module capacity ratio rather than uniform allocation. Each inverter receives power proportional to its actual PV module capacity, allowing the system to adapt to uneven installations and reduce active power generation losses while maintaining manageable complexity through a systematic allocation approach.
2Productivity
If power allocation is based on capacity ratio and overload power, then active power generation loss is reduced, but the calculation and allocation process becomes more complex
Solution Approach 1:
The patent applies preliminary action by pre-calculating the capacity ratio for each inverter based on photovoltaic module installation data before power allocation. This preliminary calculation of capacity ratios and overload power assessment enables the system to perform optimized power allocation that reduces active power generation losses, while the pre-computed values simplify the actual allocation process rather than increasing its complexity.
Data Source
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AI summary
The present disclosure relates to the field of inverter technologies, and more particularly, to an inverter system, a power allocation method and apparatus for an inverter system, a control apparatus, a storage medium, and a photovoltaic power station. The inverter system includes a plurality of inverters. A direct current side of each of the plurality of inverters is connected to a photovoltaic module, and alternating current sides of the plurality of inverters are connected in parallel. The method includes: obtaining an overload power of each of the plurality of inverters that is in an operating state and a capacity ratio of the photovoltaic module corresponding to each inverter of the plurality of inverters that is in the operating state; and allocating a total target active power of the inverter system based on the overload power of each of the plurality of inverters and the capacity ratio of the photovoltaic module corresponding to each inverter of the plurality of inverters to obtain a target active power of each of the plurality of inverters. In this way, a loss of active power generation caused by uneven installation of the photovoltaic modules can be reduced.