1.Industry background
The northwest region represented by Xinjiang and Gansu has good light resources and sparse population, which is very suitable for the development of photovoltaic power generation. However, it is also a fact that the power demand in the northwest is small and the transmission channel is few, which causes the problem of light abandonment and power rationing. In the era of photovoltaic power generation parity, its power generation instability and the abandonment of light in the northwest region are the two major pain points in the development of the industry.
Photovoltaic grid-connected projects will be directly integrated into the large power grid system after completion, and then utilized after deployment through the large power grid. In the grid-connected mode, users cannot directly use photovoltaic power, which is the reason for the volatility of power generation. The excess electricity generated by the photovoltaic system can be stored by the energy storage system, so that the power will not be cut off at night, which can help the photovoltaic system to stabilize the output of power and achieve self-sufficiency of users.
If the northwest of the large-scale construction of energy storage system, while opening up the power transmission channels along the way, the northwest of the endless photovoltaic power can be easily transported to the large demand for electricity in the central and eastern regions.
2.FGI "Good power + storage power" solution
In order to solve the problem of the stability and absorption of new energy connected to the grid, FGI configured the SVG+ energy storage system for it, using the energy storage system's translation characteristics in time, maximizing the use of line transmission capacity, matching the trend of load consumption, and reducing the demand for capacity reduction on conventional units. New energy with energy storage system can enhance the stability of new energy power generation, new energy power generation smooth access to the grid, improve power quality, while the addition of energy storage system, can also greatly improve the absorption rate of new energy power generation.
3. Typical cases
(1) Project introduction
The 100,000-kilowatt photovoltaic power generation project of the 64th Regiment of the 4th Division Kekedala City, with an installed capacity of 100MW, is the largest single photovoltaic project connected to the grid of the 4th Division Kekedala City at present, and is also the second grid connected affordable photovoltaic project in Xinjiang. After the project is put into operation, it can save 64,000 tons of standard coal every year, and correspondingly reduce the emissions of various atmospheric pollutants every year, including 716.94 tons of sulfur dioxide, 192,600 tons of carbon dioxide, 16.84 tons of carbon monoxide, 739.99 tons of nitrogen dioxide, and 866.09 tons of soot.
(2) Solution configuration
FGI has configured a 25MW 35KVSVG system +15MW/30MWh energy storage system for this project. The energy storage system is mainly composed of energy storage battery system (including energy storage battery and battery management system), energy storage power conversion system (PCS), local booster system, gathering line, lightning protection grounding system, power supply system, lighting system, secondary protection system, control system, monitoring system, communication system, fire protection system and other systems.
(3) Project highlights
Through the optimization design of the bidirectional energy storage converter PCS, lithium iron phosphate battery pack, and each unit of the battery management system BMS, the scheme can stabilize the output of photovoltaic power stations and ensure the operation safety of the power grid. The operation is stable, the technical index is excellent, and certain economic benefits have been obtained. Compared with traditional pumped storage, compressed air and other energy storage types, it has obvious reliability and cost advantages, can meet the needs of clean power transformation, and has a good market development space.
This project FGI supporting 35KV25MWSVG site
In the era of par, China's photovoltaic industry has entered a period of deep adjustment, FGI takes the initiative to deepen technological innovation, enhance its own market competitiveness, and promote the entire industry to accelerate the road of high-quality development, contributing more positive forces to the construction of a clean, low-carbon, safe and efficient energy system in China.
