🕹️Project description

The CSF generates energy through Silicon panels which transform solar energy into electrical energy.

This project is made up of 184,590 photovoltaic modules of 650 Wp each, which are mounted on 3,235 1-axis trackers to achieve greater generation efficiency compared to a fixed installation. There will be three types of trackers, 1V60 made up of 60 photovoltaic modules, 1V45 made up of 45 photovoltaic modules and 1V30 made up of 30 photovoltaic modules.

The energy produced in direct current will be transformed into alternating current through inverters, which have a power of 200 kVA at 40°C, and a total of 11,250 will be installed distributed throughout the CSF.

In addition, this CSF will have 16 transformer stations, which will raise the voltage of the inverters from 800 V to 30 kV, so that losses are minimized in the transportation of energy to the 30/132kV booster substation. There will be only one type of transformation center, the STS-6000K-H1, which will have a power of 6,500 kVA at 40°C. The transformer stations will be interconnected with each other through 30kV medium voltage underground lines (hereinafter LSMT) and that will connect with the booster substations.

These substations will raise the voltage from 30 kV to 132 kV, thus reducing transport losses and reducing the number of lines to be built, since the higher the voltage, the lower the intensity and the more power capacity to be evacuated for each circuit. A total of 3 substations are planned, each with 3 transformer positions of 250 MVA each, which adds up to a total power of 750 MVA per substation.

The energy transformed in each substation will be transported on 132 kV lines to a collecting substation. The construction of 3 132 kV overhead lines with 3 circuits each is planned, with which each line can evacuate 750 MVA from each substation.

These lines will connect with the transportation booster substation, which will raise the voltage of the electrical energy to be evacuated to 400 kV. This substation will have three transformer positions of 750 MVA each, which adds up to a total power of 2250 MVA for the substation.

The 400 kV evacuation line will be made up of three power circuits, and will have two types depending on the area where it runs, either overhead on metal lattice supports, or buried in directly buried trenches or under pipe when the technical conditions so require. The plant will be controlled at all times by the control called Power Plant, in which parameters such as power factor (reactive energy injection), power limitation, etc. will be controlled.

A representative scheme of the CSF is shown in Figure 1.

Figure 1: General configuration Solar Photovoltaic Plant

Therefore, the CSF will have a peak power of 2,700 MWp of photovoltaic module power, a power of 2,250 MW of installed power (inverter power) and 104.00 MVA in transformer power. The following summary table is presented as a general outline of the plant:

The general power values and the coefficient of increase between the power of plates and that of inverters are as follows:

GENERAL SIZING DATA
PEAK POWER	RATED POWER	COEF. SIZING
MWp	MW	% (MWp/MW)
2.700	2.250	1,20

This is done because the plates, due to different factors (angle of solar incidence, temperatures, clouds...) do not reach 100% of the peak power.

Therefore, to achieve that power it is necessary to install the following number of plates and, therefore, followers:

PLATES	FOLLOWERS
PEAK POWER	NUMBER OF PLATES	ABILITY	NUMBER OF FOLLOWERS
Wp	UD	PLATES/FOLLOWER	UD
650	4.153.846	60	69.231

And the inverters and transformer stations necessary to convert the electrical energy generated in direct current to alternating current and raise the voltage to minimize losses are the following:

INVESTORS	TRANSFORMER STATIONS
POWER	NUMBER OF INVESTORS	POWER	Nº CT	Pot. Total
kVA	UD	kVA	UD	MVA
200	11.250	6.500	347	2.255,50

The infrastructure associated with the evacuation are the substations, which raise the voltage to transport energy and optimize losses, and on the other hand the power lines, both overhead and underground, that will connect the substations to each other (132 kV) and to the point of consumption and discharge to the network (400 kV):

	SUBSTATIONS 30/132 kV	AIRLINES 132 kV
NO. POSITIONS	TRANSFER POWER	POT. TOTAL	SUBSTATION NUMBER S	Nº CIRCUITOS	INTENSIDAD LÍNEAS
UD	MVA	MVA	UD	UD	A
3	250	750	3	9	1.093,47

SUBSTATION 132/400 kV	EVACUATION LINE 400 kV
NO. POSITIONS	POT. TRANS.	POT. TOTAL	NUMBER OF CIRCUITS	INTENSIDAD LÍNEAS
UD	MVA	MVA	UD	A
3	750	2250	3	1.082,53