Distribution network loss apportionment method based on consideration of DG equivalent capacity utilization hour coefficient

Abstract

The invention discloses a distribution network loss apportionment method based on the consideration of a DG equivalent capacity utilization hour coefficient. According to the method, the active outputprobability characteristic of each distributed power supply in the distribution network within a certain time period is collected, and then the equivalent capacity utilization hour coefficient of thedistributed power supply is calculated and obtained. Meanwhile, the power flow calculation is carried out on the interconnected distribution network of all distributed power supplies at a rated power. Therefore the size of the network loss which should be apportioned under the rated power of each distributed power supply is calculated through a tidal current tracking algorithm. Finally, in combination with the equivalent capacity of each distributed power supply with an hour coefficient, the total amount of the network loss which is shared by each distributed power supply of the grid in the time period is calculated. The network loss apportionment calculation process is greatly simplified.

Description

technical field [0001] The invention relates to the field of distribution network loss allocation including distributed power sources, in particular to a distribution network loss allocation method considering the utilization hour coefficient of equivalent capacity of distributed power sources. Background technique [0002] Since our country is in the stage of encouraging the development of green energy, many preferential policies have been provided for distributed power grid-connected power generation. Therefore, although the grid connection of distributed power generation will affect the line loss of the distribution network, due to the constraints of my country's national conditions and policies, distributed power generation does not participate in the distribution of network loss. With the increase of distributed power access capacity, the network loss allocation problem caused by distributed power grid connection has gradually attracted the attention of both power suppl...

AI Technical Summary

Problems solved by technology

Among them, the average network loss allocation method allocates network loss according to the proportion of transmission user power (electricity), but this method can only realize one-way allocation of network loss, and cannot reasonably allocate network loss to distributed power users and power supply companies ; The marginal network loss coefficient method allocates the network loss of each node according to the size of the change in the entire network network loss caused by the unit change of the node injection power. Loss allocation; the power flow tracking method performs network loss allocation based on the degree of use of lines by each node. The allocation idea is clear, but the calculation parameters are relatively high, and when the distributed power grid-connected power fluctuates, power flow tracking requires multiple iterations to accumulate network loss allocation value, the calculation process is complicated, the calculation amount is large, and the requirements for data acquisition ability and server operation ability are high, so it is difficult to apply to the distribution network loss allocation calculation with distributed power generation within a certain period of time

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