"Peak-valley arbitrage" refers to a strategy that takes advantage of the difference in electricity prices between peak and trough periods to make a profit by storing electricity in batteries and then releasing it during peak electricity price periods. In a peak-valley arbitrage, electricity prices are usually higher at the peak and lower at the trough. So, by storing electricity in batteries, buying it during the low periods, and then selling it during the peak periods, you can make a profit.
Peak Valley arbitrage is a common profitable way in industrial and commercial energy storage, but it requires a relatively stable power market, and requires a certain amount of technology and market analysis ability to achieve.
二、New energy grid consumption
In the industrial and commercial energy storage market, more and more enterprises have begun to use photovoltaic + energy storage system, and the government has also vigorously introduced subsidies to encourage policies, photovoltaic + energy storage system has important environmental protection, energy security and economic benefits and other multiple roles, in line with the direction of China's energy transformation.
From a profit point of view, improve the utilization of new energy: through the support of the energy storage system, the electricity generated by photovoltaic power generation can be temporarily stored and then released when needed, thus smoothing the power demand of the power system. This can reduce the abandonment and waste caused by the mismatch between new energy generation and electricity demand, and improve the utilization rate of new energy.
三、Power distribution expansion
With the increase of production capacity, the demand for electricity capacity of industrial and commercial users also expands. However, the power capacity originally applied (transformer capacity, KVA) has been unable to meet the business needs. Therefore, the distribution capacity must be increased on the original basis. In this case, energy storage systems can play a role.
When the power demand exceeds the transformer capacity in a short time, the energy storage system can be quickly charged to meet the load power demand. This can not only reduce the cost of transformer use, reduce transformer investment and expansion cycle, but also ensure the normal production and operation of industrial and commercial users.
Example of typical factory electricity consumption data (blue is more suitable for energy storage)
四、Energy storage system to achieve capacity management to reduce electricity costs
In China, the electricity tariff of industrial and commercial users is divided into two parts: basic electricity price and electricity price, usually called "two-part electricity price". The basic electricity price is also called the capacity electricity price, which is calculated according to the transformer capacity and the maximum demand of the user, and is a fixed monthly fee; The electricity price is calculated according to the actual electricity consumption. Industrial and commercial users using energy storage systems can store electrical energy during low consumption and release it during peak consumption, thereby reducing peak power and maximum demand, and making the usage curve smoother. This will reduce the maximum power demand of the business, which will lower the base price, which in turn will lower the overall electricity bill.
五、Fifth, market demand side response
In simple terms, the power demand response refers to the enterprise in the power shortage, take measures to reduce electricity consumption, in order to balance the relationship between supply and demand, and obtain economic compensation.
According to the "Guangdong Province Market-oriented Demand Response Implementation Rules (Trial)" notice issued by Guangdong Province, enterprises can obtain an incentive price of up to 3.5 yuan /kWh through the use of user-side energy storage systems, which can both produce and obtain subsidies. According to the historical data of Guangdong Province, it is necessary to respond to electricity demand about 60 times a year, so the investment payback period can be shortened by one year. This practice helps to improve the economic efficiency of enterprises and helps to ensure the stability of power supply.
六、Electrical auxiliary service
To be clear: Demand response is the use of government funds or grid marketing fees. The auxiliary service is to participate in the market trading on the power generation side, and the source of funds is different.
七、Spot trading of electricity
Power spot trading refers to a kind of trading mode in the power market, that is, in the case of actual electricity demand and power generation supply changes, through the way of market trading for power delivery. Spot trading of electricity is the most common way of trading in electricity market, and it is also one of the important contents of market reform. In power spot trading, power generation enterprises and power purchasing enterprises can negotiate a power transaction according to the market price, so as to achieve the balance of power supply and demand and price discovery. Electricity spot trading generally adopts the bidding method, that is, the buyers and sellers involved in the transaction offer prices according to the market price, and the electricity market realizes the delivery of electricity through matching transactions.
Therefore, power spot can be defined as: has been built and connected to the grid, with the conditions for generation of power plants can be expected to supply electricity to users (electricity).
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