On the roof of the industrial and commercial buildings, solar modules can be installed, and energy storage systems can be used to generate electricity. In addition to providing clean energy, the optical storage system can also use the peak-to-valley electricity price to save electricity for the company. When the grid is out of power, the replacement diesel engine becomes a backup. Power supply, the current battery cost is relatively expensive, relying solely on photovoltaic power generation and peak-valley difference, generally 5, 6 years to recover the cost, investment income is not very high. In fact, in addition to these functions, optical storage system, there are more uses: Multiple intelligent cores can handle things other than optical storage systems; there are multiple external communication interfaces, in principle, all electrical equipment can be monitored; energy storage inverter power electronic four-quadrant topology, active and reactive power freely adjustable These functions only require a small amount of cost, but they can generate more economic benefits, and the cost can be recovered in 3 or 4 years, and the economic investment becomes very high.
1. Summary of industrial and commercial smart energy management system
The industrial and commercial smart energy management system utilizes the Internet of Things, connects the large power grid, distributed energy stations, energy users, and uses the energy management system to realize the flexible and controllable integrated energy system of the industrial and commercial parks, promote the development of clean energy, and realize electric energy, heat (cold The comprehensive utilization of energy, mutual conversion and storage, reduce energy costs, improve economic efficiency, reduce pollutant emissions. Help enterprises to carry out efficient energy management, change energy usage habits, regulate and strengthen energy management.
Industrial and commercial parks have cold, heat, electricity and other load requirements. All types of loads are purchased from independent energy companies. The cost of energy consumption is high, the loss of transportation process is large, and low-grade energy cannot be reused. The utilization efficiency is low; the industrial electricity price is divided into three kinds of electricity prices, and the price of peaks and valleys in some provinces differs by more than three times. The billing standard is divided into common industrial and commercial, large industrial transformer capacity, and the largest demand of large industry. How to save electricity is also a The university asked. The construction of the smart energy system is a systematic project involving the preparation of regional resource conditions, load analysis, user purchasing intention, energy system construction plan, financial analysis, etc., and needs to build a strong The system goes to adjust.
2, the core of smart energy management system
1) Rational use of space area, construction of photovoltaic power stations or wind power generation:
Spontaneous use or surplus Internet access, use national and local subsidies to create economic benefits for enterprises, and reduce energy costs for industrial and commercial capacity. Parallel energy storage systems can smooth load fluctuations caused by intermittent new energy generation, improve system daily load rate, and It can be used as the spare capacity in the power system to participate in the system's frequency modulation, peak shaving, improve the utilization rate of power generation equipment, and improve the overall operating efficiency of the power grid.
2) Controllable and adjustable key equipment:
The power factor of the energy storage converter and the photovoltaic inverter can be controlled and adjusted to improve the power grid environment in the factory, avoiding the penalty due to excessive power factor. The higher power factor can also reduce the power consumption of the line and equipment. Charge and discharge can be controlled and controlled, using the peak-to-valley price difference of electricity charges, storing electricity from the grid when electricity is low in the evening, and releasing it from the battery during peak hours during the day, helping enterprises to manage the peak value of electricity and reducing the peak period of the plant's time-of-use electricity price. Electricity, conditional businesses can also save on capacity.
3) Emergency standby power supply:
When the power grid fails, the solar power, wind power, oil machine, energy storage battery and other power generation methods are used to form the micro grid energy storage system to provide uninterruptible power for critical loads.
4) Load analysis and management:
Using various sensors and meters to analyze various parameters, the impact of variables on energy (such as: weather, production, etc.), manage energy consumption in all aspects of production operations, find equipment inefficient in the production process and use energy in the enterprise Waste situation, establish energy economic indicators (equipment energy consumption per unit area, energy consumption per unit area) required by various enterprises, consider the impact of energy prices and costs into production, help enterprises strengthen energy consumption, energy accounting management, and enable enterprise management More scientific.
