Cost Allocation Method for Active Distribution Network Based on Distribution Factor

Abstract

The invention provides a distribution factor-based active distribution network cost sharing method. The method comprises the following steps of: determining a typical operation mode to be considered when the cost sharing of a power grid is calculated, such as the maximum load scenario in summer; establishing a network loss equivalent load model; combining the network loss equivalent load model tocalculate a distribution factor matrix; calculating a generation-load power distribution matrix; and calculating the sharing cost of the distribution network bore by a load node. The distribution factor-based active distribution network cost sharing method can dynamically adapt to the variable operation mode of the active distribution network by calculating the distribution factors of the node andthe topology, and perfects the DC power flow model core of the distribution factor method through network loss correction and analysis of the degree of use of the circuit. The method has the good adaptability to the active distribution network, can objectively measure the degree of use of the lines by different load nodes in different operation modes, which is beneficial to guide the market usersto adjust their own power consumption behavior.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a distribution factor-based cost allocation method for an active distribution network. Background technique [0002] The power system is composed of power generation, power transmission, power distribution and power consumption. In the electricity market environment, the independent verification of transmission and distribution prices is an important link to orderly promote the reform of electricity prices and rationalize the formation mechanism of electricity prices. By establishing a scientific and reasonable cost method for power transmission and distribution, on the basis of ensuring the stable income of power grid enterprises, it can make power grid enterprises in a neutral position in market transactions, create a fair and orderly market environment, and realize the cost of power transmission and distribution on the power generation side. Fair and reasonable distri...

AI Technical Summary

Problems solved by technology

The distribution cost allocation and pricing method of the active distribution network mainly faces the following three problems: First, due to the volatility of distributed power sources, it is necessary to frequently adjust and control the energy flow and path in the distribution network, which requires a flexible network topology. It is no longer a simple radial structure; secondly, users such as energy storage and controllable loads can actively participate in the energy balance of the grid and the control and adjustment of frequency and voltage, making the power flow in the active distribution network more The third is that distributed energy resources and users are located at different nodes in the network, so the capacity utilization of each branch is different.

Due to the large resistance-reactance ratio (R / X) of the distribution network, directly using the DC power flow method for calculation will produce a large network loss error; on the other hand, the traditional distribution factor method mainly uses the method of calculating the degree of line utilization based on sensitivity , its essence is to calculate the micro-increment of the line power flow caused by the increase of the unit load of the load node in a certain state, so as to reflect the use degree of the line asset by the node. This calculation method requires the system to have strong linear characteristics. It has certain applicability in the transmission network, but the distribution network has strong nonlinear characteristics. It is difficult to truly reflect the utilization degree of the full load level of the node for the line assets through the sensitivity analysis of an operating point.

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