summary
Ground centralized photovoltaic power plants convert solar radiation energy into electrical energy through photovoltaic arrays, connect to the public power grid, and jointly undertake power supply tasks. The scale of large and medium-sized photovoltaic power generation systems is generally above the megawatt level, which is an important development direction for solar photovoltaic power generation to enter the stage of large-scale commercial power generation and become a component of the power industry. Large and medium-sized grid connected photovoltaic systems are composed of photovoltaic module arrays, DC combiner boxes, DC cabinets, centralized grid connected inverters, AC cabinets, step-up transformers, switchgear, and power station monitoring systems.
Ground centralized photovoltaic power stations refer to photovoltaic power stations developed using vast and flat desert land resources. This type of power station has a large scale, generally greater than 5MW. Currently, it is very common for a single power station with a scale of over 50MW: the inverter output of the power station is directly fed into the high-voltage transmission network with a voltage level of 35-110kV, 330kV or higher after boosting, and the environment is flat, with consistent orientation of photovoltaic modules and no obstruction.
Applicable scope
Photovoltaic power stations commonly developed on vast and flat desert land; Connect 35kV, 110kV or higher voltage to the high-voltage power grid; The capacity of power stations is generally between 5MW and several hundred MW.
Characteristic advantages
Due to more flexible site selection, the stability of photovoltaic output has been increased, and the positive peak shaving characteristics of solar radiation and electricity load have been fully utilized, playing a role in peak shaving:
The operation mode is relatively flexible, making it easier to control reactive power and voltage compared to distributed photovoltaics, and participating in grid frequency regulation is also easier to achieve;
Short construction cycle, strong environmental adaptability, no need for raw material support such as water source and coal transportation, low operating cost, easy centralized management, and limited by space, it can easily achieve expansion.
