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In this paper, a photovoltaic station which local in Yancheng, Jiangsu province with installed capacity 19MW as an example to analysis the output of PV station which effect by the shadow of (ultra high voltage) UHV tower. Firstly, the model of UHV tower is established, the shadow range of UHV tower on winter solstice day is calculation according to local latitude and longitude information combined...
Because photovoltaic (PV) power generation has characteristics of volatility and randomness, with large-scale PV power generation connected to the grid, it will effect the safe and stable operation of power gird. It is necessary to establish an accurate grid-connected PV inverter model to carry out a reliable load flow analysis calculations. Under the steady-state, grid-connected PV inverter control...
Low voltage ride through (LVRT) ability is the most important indicators of photovoltaic (PV) power generation unit grid-connected performance. At present, most of the important standards in the world require that PV power unit must have LVRT ability, and part of the standards demand that PV power generation unit should have reactive power support capacity as well, in order to maintain grid voltage...
In order to evaluate the accuracy of the European efficiency measurement result in Photovoltaic inverter, the uncertainty evaluation of European efficiency in Photovolatic inverter is searched in this paper. According to the standards of EN50530-2010 “Overall efficiency of grid connected photovoltaic inverters” and CNAS-GL08 “Guidance on evaluating the uncertainty in electrical apparatus testing”,...
In this paper, the performance ratio (PR) of PV system is evaluated by field testing. The sampling strategy of efficiency chain for PV system is determined by analyzing long-term operation monitoring data of PV system. The efficiency parameters of components are extracted. The efficiency model of components in PV system is established in PVsyst software. Combining efficiency models, geographic information...
In this paper, the test platform of PV inverter MPPT efficiency is researched. The test method of PV inverter MPPT efficiency is analyzed according to evaluation index of PV inverter MPPT efficiency. Based on the MPPT efficiency test method, The PV array simulation should output P-V curve of PV array in different irradiance and different type of PV module. A 500kW PV inverter MPPT efficiency is tested...
In this paper, the method of irradiance on horizon change to irradiance on PV array is analyzed. The two PV systems which in same latitude but different irradiance resource and irradiance ingredients are simulated in order to got the optimal tilt of PV array. the tilt of PV array should chosen from 0° to local latitude. In direct irradiance abundant region, the tilt should be increased. In diffuse...
In this paper, the power quality of PV system is analyzed which contains test conditions, test method and test results according to the technical rule of power quality in Q/GDW617-2011 ‘Technical rule for photovoltaic power station connected to Power Grid’ and the test procedures of power quality in Q/GDW618-2011 ‘Test procedures for photovoltaic power station connected to power grid’. Compare with...
A new method is proposed to estimate power line communication radiated EMI noise. By using the noise separation to extract common mode (CM) noise current, the radiated EMI noise can be estimated according to the relationship between the radiated EM field and the CM noise current. The experiment results show that the radiated EMI noise is decreased obviously, while the CM current is suppressed by using...
Two-current probes method and S-parameter method are studied comparatively for conductive EMI noise source modelling in this paper. Firstly, the basic theory of the two-current probes method and S-parameter method are introduced for noise source impedance extraction. Secondly, ZX and Zsetup are important intermediate results in the two methods, therefore their extractions are analyzed respectively...
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