4041 Calculation of Battery Capacity for Solar Power Generation System
Author: Source: Datetime: 20161222 15:02:40
That can be established as shown in Figure 32 model. Thereby estimating the energy supplied to the load, and performing the capacity design calculation of the system device.
Basic formula
In order to determine the capacity of a system component such as a solar battery module and the like, the following calculation formula can be used in designing a solar photovoltaic power generation system.
On the negative extension of the lip force, but to use the plan of the formula,
Calculation of battery capacity
Load a certain situation
If the power flow shown in Fig. 32 is formulated in the case where the load of the supplied electric power and the amount of electric power and the type of load to be used are determined, Equation (31) is given. Expand this formula to obtain the requirements to meet the load capacity of the battery capacity of PAS formula (33)
Wherein
H_{A} The amount of solar radiation from a solar panel during the period kW•h / m^{2},
A Solar panel area m^{2}
η_{PS} Standard conversion efficiency of solar panelsK Integrated Design Factor (Integrated System Efficiency)
E_{L} The amount of electric power required for a certain period of time,kW•h
D Solar power to ensure the rate of power supply load
R Design Surplus System (Safety Factor)
P_{AS} Output (capacity) of solar panels under the standard
G_{S} Standard solar irradiance kW / m^{2}
D = E_{P} / (E_{P} + E_{U}) (34)
E_{U} = E_{UF}E_{UT} (35)
Wherein
E_{P} The amount of electricity produced by a solar PV system during a period of kW•h
E_{U} power (auxiliary) kW•h
E_{UF} Electric energy from the system kW•h
E_{UT} Electricity delivered to the system kW•h
R = R_{S}R_{L} (36)
Wherein
R_{S} design security system (to make up all the system design is not the real place)
R_{L} design surplus factor (including the need for energy surplus)
Battery board surface certain occasions
In the case where the conversion rate of the module is temporarily set aside in the case where the land area needs to be set sufficiently as in the case of a photovoltaic power generation system for residential use, the power generation capacity of the photovoltaic power generation system to the load or the system
E_{P} = P_{AS} (H_{A} / G_{S}) K (37)
P_{AS} = η_{PS}AG_{S} (38)
Where E_{P} is the amount of electricity generated by the solar photovoltaic power generation system, kW•h
In the calculation of PV system parameters, in addition to the parameters described here, there are several parameters. Their representations are exactly the same as in (37).
E_{P} = P_{AS}Y_{P} = P_{AS} X 8760F_{C} (39)
Y_{P} = (H_{A} / G_{S}) K = Y_{1}K
= 8760F_{C} (310)
F_{C} = Y_{P} / 8760, Y_{1} = H_{A} / G_{S} (311)
Wherein
Y_{P} Equivalent system operating time h
F_{C} during which a system utilization
Y_{1} Equivalent sunshine time h
These parameters, in assessing the actual operation of solar photovoltaic power generation system is also very practical, usually K is called the system output coefficient.
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