The power supply and demand adjustment system is a system introduced and operated by a power network company.This is a system in which storage batteries are installed in substations and power supply and demand is adjusted using these power storage facilities such as pumped storage hydroelectricity and electricity storage type ultra-fast charger.
From now on, in order to reduce carbon dioxide emissions, we must increase solar power generation and wind power generation, which do not emit carbon dioxide during power generation.
According to the Ministry of the Environment's "Greenhouse Gas Emissions in FY2018", the annual power generation results in FY2018 are 62.7 billion kWh for solar power generation and 7.5 billion kWh for wind power generation.
In the future, there is room for expansion of solar power generation on the roofs of factories, supermarkets, convenience stores, parking lots, and roofs of ordinary households.
Wind power generation is expected to increase due to plans for wind power generation not only on the ground but also at sea.
Photovoltaic power generation and wind power generation are power sources whose amount of power generation fluctuates greatly depending on the weather.
In order to use this generated electricity for general demand, it must be connected to an electric power network.
The power supply and demand adjustment system makes it possible to stabilize the power supply and demand even if these connections are increased.
The power supply and demand adjustment system communicates data between the storage batteries installed in substations, etc., and the power storage equipment of pumped storage hydroelectricity and electricity storage type ultra-fast charger.The following power supply and demand adjustments are made by data communication.
Power supply and demand adjustment
The power supply and demand adjustment system constantly monitors the total supply on the power generation side and the total demand on the load side.Based on the power supply and demand situation, the following supply and demand adjustments are made by dividing into "when the supply amount is large" and "when the supply amount is small".
①Pumped storage power plants pump water during low load hours and generate electricity during high load hours.The amount of power that can be pumped or generated with the current amount of water is sent to the power supply and demand adjustment system.Pump water or generate electricity according to the supply and demand adjustment instructions in the table below.
②Storage batteries installed in substations, etc. store electricity during low load hours and discharge during high load hours.The amount of power that can be stored or discharged from the current amount of electricity is sent to the power supply and demand adjustment system.Charge or discharge according to the supply and demand adjustment instructions in the table below.
③The power storage type ultra-fast charger stores electricity at 30% when the power obtained by subtracting the current power consumption from the contract power is 100%.The following data is sent to the power supply and demand adjustment system.Current storage ratio and power consumption.Contract power and the date and time of the last supply and demand adjustment. Based on this data, electricity is stored according to the ratio of the supply and demand adjustment instructions in the table below from the power supply and demand adjustment system.
| When the supply is large |
Extract the demand sources in the order shown in the table on the right until the supply on the power generation side and the demand on the load side are the same.Instruct the extracted equipment to carry out demand in sequence. |
① Pumped storage power amount of pumped storage power plant. ② Amount of stored power of storage batteries installed in substations, etc. ③ The storage type ultra-high-speed charger is extracted in the order of longest after supply and demand adjustment.The amount of power that has increased the storage ratio of the extracted ultra-high-speed charger from 30% to 50%. |
|---|---|---|
| When the supply is low |
Extract the sources of supply in the order shown in the table on the right until the supply on the power generation side and the demand on the load side are the same.Instruct the extracted equipment to supply in sequence. |
① Amount of power generated by pumped storage power plants ② Amount of discharge power of storage batteries installed in substations, etc. ③ The storage type ultra-high-speed charger is extracted in the order of longest after supply and demand adjustment.The amount of power obtained by reducing the storage ratio of the extracted storage-type ultra-high-speed charger from 30% to 10%. |
The power generation side pays the power adjustment fee to the power network company.The power network company uses this power adjustment fee for the introduction and operation cost of the power supply and demand adjustment system.
It is also used for the cost of installing storage batteries in substations.In addition, a fee proportional to the amount of adjusted power will be paid to the installer of the storage-type ultra-high-speed charger as an adjustment cooperation fee.
Therefore, when the power generation side connects to the power network, it is necessary to consent to the payment of the power adjustment fee.
In addition, when connecting a power storage type ultra-fast charger to the power network, the owner must consent to the following items.
Certified product of power network management company.Accept the control conditions of Power supply and demand adjustment.