Power management method and power management system

Abstract

This provides a power management method that can absorb surplus power. [Solution] The method comprises the steps of: calculating the amount of surplus absorption required in a first distribution line due to the increase in power generation in an RE power generation facility; calculating the amount of surplus absorption possible by charging energy storage resources owned by a first consumer that receives power through the first distribution line; calculating the amount of demand reduction possible at a second consumer that receives power through a second distribution line different from the first distribution line; selecting surplus-absorbing consumers from the first consumer such that the total amount of surplus absorption possible is equal to the amount of surplus absorption required; selecting demand-reducing consumers from the second consumer such that the total amount of demand reduction possible is a value corresponding to the total amount of surplus absorption possible by the surplus-absorbing consumers; carrying out surplus power absorption and demand reduction; and calculating compensation for surplus-absorbing consumers and demand-reducing consumers based on actual values.

Claims

1. A power management method for retail electricity businesses that sell electricity exchanged through the power transmission and distribution network to contracted customers, a) A step of calculating the required surplus absorption amount, which is the amount of surplus power that is expected to be generated in the first distribution line as the amount of power generated by the renewable energy generation equipment increases, based on power congestion prediction information in the first distribution line provided in the power transmission and distribution network and to which renewable energy power generation equipment is connected, and the transmission capacity of the first distribution line, b) A step of calculating the amount of surplus power that can be absorbed by charging a first energy storage resource owned by at least one first consumer that receives power through the first distribution line, c) A step of calculating a demand reduction amount, which is the amount of demand power that can be reduced at least one second consumer that receives power through a second distribution line different from the first distribution line in the power transmission and distribution network, d) A step of selecting at least one surplus absorbing consumer to perform the absorption of the surplus power from the at least one surplus absorbing consumer such that the total amount of surplus that can be absorbed by the at least one surplus absorbing consumer is equal to the amount of surplus that needs to be absorbed, e) A step of selecting at least one demand-reducing consumer to implement the reduction of the demand power, such that the total amount of demand reduction possible at the at least one demand-reducing consumer is a value corresponding to the total amount of surplus absorption possible at the at least one surplus-absorbing consumer, f) A step of causing the at least one surplus absorbing consumer to absorb surplus electricity with the surplus absorption amount as the target value, and causing the at least one demand suppressing consumer to suppress demand electricity with the demand suppression amount as the target value, g) A step of calculating the compensation to the at least one surplus absorbing consumer based on the actual value of the surplus power absorbed by the at least one surplus absorbing consumer, and calculating the compensation to the at least one demand suppressing consumer based on the actual value of the demand suppression of the at least one demand suppressing consumer, A power management method characterized by comprising the following features.

2. A power management method according to claim 1, In step e), it is determined whether the predicted maximum total sales amount, which is the total amount of electricity sold by the retail electricity provider to customers under contract, exceeds a predetermined maximum sales amount, assuming that the same amount of surplus electricity as the surplus absorption amount is absorbed by the at least one first customer, and if the predicted maximum total sales amount exceeds the maximum sales amount, the at least one demand-restraining customer is selected such that the total amount of demand-restraining possible for the at least one demand-restraining customer is equal to or greater than the amount of the total sales amount exceeding the maximum sales amount. A power management method characterized by the following features.

3. A power management method according to claim 1 or claim 2, In step c), the amount of electricity demand that can be suppressed by discharge from the second energy storage resource owned by the at least one second consumer is calculated as the amount of demand that can be suppressed. A power management method characterized by the following features.

4. A power management method according to claim 1 or claim 2, In steps a), b), and c), respectively, the required amount of excess absorption, the amount of excess absorption possible, and the amount of demand reduction possible are calculated at predetermined unit time intervals for a predetermined target period. In steps d) and e), a surplus absorbing consumer and a demand suppressing consumer are selected at predetermined intervals. A power management method characterized by the following features.

5. A system for power management in a retail electricity business that sells electricity received through the power transmission and distribution network to contracted customers, A surplus absorption requirement calculation means calculates the amount of surplus power that is predicted to be generated in the first distribution line as the amount of power generated by the renewable energy generation equipment increases, based on power congestion prediction information in the first distribution line, which is provided in the power transmission and distribution network and to which renewable energy power generation equipment is connected, and the transmission capacity of the first distribution line. A surplus absorption capacity calculation means for calculating the amount of surplus electricity that can be absorbed by charging a first energy storage resource owned by at least one first consumer that receives power through the first distribution line, A demand reduction amount calculation means for calculating a demand reduction amount which is the amount of demand power that can be reduced at least one second consumer that receives power through a second distribution line different from the first distribution line in the aforementioned power transmission and distribution network, A surplus absorbing consumer selection means for selecting at least one surplus absorbing consumer to perform the absorption of the surplus power, such that the total amount of surplus absorption possible by the at least one surplus absorbing consumer is equal to the required amount of surplus absorption; A demand suppression customer selection means for selecting at least one demand suppression customer to implement the aforementioned demand suppression, such that the total amount of demand suppression possible in the at least one demand suppression customer is a value corresponding to the total amount of surplus absorption possible in the at least one surplus absorption customer, An execution instruction means that causes the at least one surplus absorbing consumer to absorb surplus power with the surplus absorbable amount as a target value, and causes the at least one demand suppressing consumer to suppress demand power with the demand suppressable amount as a target value, A payment calculation means that calculates the payment to the at least one surplus absorbing consumer based on the actual value of the surplus power absorbed by the at least one surplus absorbing consumer, and calculates the payment to the at least one demand suppressing consumer based on the actual value of the demand suppression of the at least one demand suppressing consumer, A power management system characterized by comprising the following features.

6. A power management system according to claim 5, The demand reduction customer selection means determines whether the predicted maximum total sales amount, which is the total amount of electricity sold by the retail electricity provider to customers under contract, exceeds a predetermined maximum sales amount, assuming that the same amount of surplus electricity as the surplus absorption amount is absorbed by the at least one first customer, and if the predicted maximum total sales amount exceeds the maximum sales amount, it selects the at least one demand reduction customer such that the total amount of demand reduction possible for the at least one demand reduction customer is equal to or greater than the amount of the total sales amount exceeding the maximum sales amount. A power management system characterized by the following features.

7. A power management system according to claim 5 or claim 6, The demand reduction amount calculation means calculates the amount of electricity demand that can be reduced by discharge from a second energy storage resource owned by at least one second consumer as the demand reduction amount. A power management system characterized by the following features.

8. A power management system according to claim 5 or claim 6, The surplus absorption requirement calculation means, the surplus absorption capacity calculation means, and the demand reduction capacity calculation means each calculate the surplus absorption requirement, the surplus absorption capacity, and the demand reduction capacity at predetermined intervals over a predetermined target period. The surplus absorbing consumer selection means and the demand suppressing consumer selection means each select the surplus absorbing consumer and the demand suppressing consumer at predetermined intervals. A power management system characterized by the following features.

Images