29 Technical Requirements for Terrestrial Photovoltaic Power Plant Projects

1. Photovoltaic modules adopt a "horizontal" arrangement.

2. Photovoltaic panel steel brackets use front and rear legs, and columns do not use C-shaped steel.

3. Photovoltaic plate foundation should be determined based on the geological survey report the best way, the pile spacing should be taken from 1.2m ~ 1.5m.

4. The direct current wire used for photovoltaic direct current is used to reduce losses as much as possible.

5. Optimize the connection box wiring to minimize the cable channel.

6. The DC switch in the combiner box needs to add a signal module and a surge protector.

7. The composition ratio is determined according to the local irradiation resources and power limitation conditions. In principle, it should be no less than 1.1:1.

8. The box base is 500mm higher than the floor.

9. Change the box to the inverter liaison cable using three-core cable.

The maximum number of 10.35 kV current collector circuits is no more than 10 MW each time.

11. Intra-site communication adopts ring network communication.

12. The cable connector adopts cold shrinkage.

13. Terminals in the combiner box must be supplied with copper wiring to meet the site wiring requirements.

14. The anti-reflex diodes are installed in the combiner box and are not installed on the inverter side.

15. SVG uses a step-down type and capacity is considered as 12 Mvar.

The 16.35kV intelligent measurement and control device and live display device shall be installed on the switch cabinet door.

At the bottom of the 17.35kV distribution equipment, cable tunnels were used to arrange cables, and manholes were installed in the 35kV distribution room to enter the cable tunnels.

18. The booster station requiring secondary boosting is grounded with a resistor. The grounding method of the switchgear station must meet the grid requirements. The arc suppression coil or resistance grounding method may be used.

19. Photovoltaic module arrays are bridged and grounded by grounding flat steel, and both ends must be grounded reliably.

20. The ground of the conventional terrestrial power station components is not less than 500mm from the ground where the weeds grow, and the rest is not less than 400mm.

twenty one. In the heavily polluted areas such as coastal areas, the PV modules use anti-PID components, and the inverters are equipped with anti-PID configurations. All electrical equipment uses anti-fouling equipment.

twenty two. Steel brackets must meet the structural requirements to increase wall thickness and galvanized thickness to resist corrosion. FRP brackets can also be used.

twenty three. The distribution building is equipped with 35kV distribution room, power distribution room for low voltage station, centralized control room (area of ​​not less than 40m2, 300mm high overhead floor), secondary equipment room (300mm high overhead floor), tool room, and restroom.

twenty four. The number of comprehensive buildings is 12 members (1 general manager, 1 deputy general manager, and 10 operating personnel), and 1 general manager office, 1 deputy general manager office, 1 public large office, and 1 large conference are required. Room, 1 activity room (about 50m2), 1 reference room, 1 spare room, 1 kitchen, 1 small restaurant, 5 double dormitory (including separate toilet), 1 general manager dormitory (including separate toilet) , 1 deputy general manager dormitory (including independent hygiene), 1 separate toilet.

25. The booster station and comprehensive building area use cement roads, the main road is 6m wide, and the parking lot location is set. The gravel road is used in the site area.

26. Photovoltaic field fence adopts wire-shaped fence (the total height is not less than 1.8m and the bottom distance is not more than 150mm), and the booster station and comprehensive building area use the lower part of 500mm high solid wall, the upper part is wrought iron, and the total height is not lower than 2.2. m's fence.

27. HVAC heating uses electrothermal radiation equipment.

28. A flood light is set on the corner of each inverter, and the light direction is directed to the corresponding box change area.

29. The inverter should be arranged with the central area of ​​the square,

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