43-44 Definition of Design Parameters
Author: Source: Datetime: 2016-12-22 15:07:27
The basic design formula is expressed in terms of the amount of power generated, the design parameters of the power generation is of course given. It is necessary to calculate the accumulated value of the measured radiant intensity, the amount of power generation, and the like in a certain period. This period must be at least one year.
K=KHKPKBKC also K=KH*KPKBKCWherein
KH The correction coefficient of human radiation (based on solar panel surface radiation)
KH* The correction coefficient of the human radioactivity (based on the level of all-day radiation)
KHB From the level of solar radiation to the solar panel surface of the amount of radiation conversion factor;
KP Solar cell conversion efficiency correction factor;
KB Battery circuit correction factor;
KC Power regulator loop correction factor.
KH=KHDKHSKHC also K H*=KHGKHDKHSKHCWherein
KHD The correction coefficient of annual variation of solar radiation;
KHS Shading correction coefficient;
KHC Effective coefficient;
KHG Solar panels increase in the amount of the main factors, usually greater than 1.
KHCD Direct surface radiation coefficient;
KHCT Flat tracking gain coefficient.
KPD Time - varying correction coefficient;
KPT Temperature correction coefficient;
KPA The correction coefficient of the panel circuit;
KPM Charge integration correction factor.
KPDS Correction coefficient of sewage erosion;
KPDD Correction factor;
KPDR Modification Coefficient of Response to Variation of Photovoltaic Power Generation.
KPDRS Spectral response variation correction coefficient;
KPDRN Nonlinear Response Variation Correction Coefficient.
KPAU Combined circuit correction factor;
KPAL The loss correction factor of the panel circuit.
γBA Allowable discharge rate of battery;
ηBD Bypass energy efficiency;
ηBA Energy storage efficiency of battery end.
ηBA = KB，OPηBTS
KB，OP=KB，Sd KB，ur KB，au ηBCWherein
KB，OP Battery operation comprehensive efficiency correction coefficient;
ηBTS Battery test efficiency;
KB，OP Self - discharge coefficient;
KB，OP Non - equilibrium charge factor;
KB，OP Auxiliary engine power reduction coefficient;
ηBC Charge and discharge control device efficiency.
γDC DC discharge rate
KDD Converter loop correction coefficient;
KIN Modification Coefficient of Inverter Circuits.
ηDDO Converter efficiency;
KDDC Converter output loop correction factor.
ηINO Inverter Efficiency
KACC Inverter AC loop correction factor
KACC= KINAU KACC KACTR KACFT KACLN KACSA
KINAU The efficiency of the inverter output auxiliary circuit;
KACTR Transformer efficiency;
KKACFT Filter efficiency;
KACLN AC line efficiency of the inverter output to the load;
KACSA Energy efficiency of the auxiliary power supply of the inverter output system.
The incident quantity correction coefficient KH is the main factor for reducing the solar radiation amount of the solar cell panel calculated from the weather observation data. The KHG solar panels is the main factor in the increase in the amount of radiation, usually greater than 1. Solar cell conversion efficiency correction factor KP, taking into account the standard state measured in the solar panel output power, in the field conditions there will be a variety of factors to reduce its value.
The correction factor KB of the battery circuit is defined by the energy efficiency in a certain period of time in consideration of the efficiency of the storage battery itself and the charging and discharging control loop.
In general, the definition of each design parameter, as shown in Figure 3-2 principle, is not usually used in the electrical output power, input power ratio, but a period () the ratio of energy, namely: Eout / Ein , this should pay special attention.
KX Represents various design parameters
Pin Input power kW
Ein Enter the energy KW•h
Pout Output Power kW
Eout Output energy kW•h
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