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Independent bound attrition pricing method

An independent, marginal technology, applied in the field of power system

Inactive Publication Date: 2010-12-08
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These methods share the common advantage of being independent of reference nodes and computationally accurate, but they have OPF model structure dependence

Method used

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Experimental program
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Embodiment

[0056] Such as figure 1 In the equivalent power grid shown in the power system, P i and Q i The active and reactive power injected into the grid by i-node users (power sources or loads) respectively (with the injection as the positive direction), for convenience, it is assumed that their values ​​are constant within one hour of the study (if they change, the specific values ​​described below The implementation principle remains the same), if a node has neither power users nor load users, its power injected into the grid is zero. In the figure, l represents any equivalent branch in the power grid.

[0057] (1) Form the node impedance matrix of the power grid, and use the ordinary power flow program or state estimation program to calculate the steady-state power flow solution of the power grid. The specific algorithms for forming the grid node impedance matrix include: node admittance matrix inversion method, branch addition method, and the specific methods for power flow cal...

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Abstract

The invention provides an independent marginal loss pricing method for overcoming the shortcomings of the existing calculation method of the reactive power cost of a power system, which is characterized in that, the independent marginal loss pricing method comprises the following steps: 1) the transmission loss power of an electric power network is expressed into a user equal value node injectioncurrent function; 2) the relative user active power branch incremental loss is calculated according to the calculation result of the step 1); 3) the relative user active power incremental loss of thepower network and the active power marginal loss price that is paid by the user are calculated according to the calculation result of the step 2); 4) the relative user reactive power branch incremental loss is calculated according to the calculation result of the step 1); 5) the relative user reactive power incremental loss of the power network and the unit reactive power marginal loss price thatis paid by the user are calculated according to the calculation result of the step 4). The method is based on the power flow solution of the practical operation state of the power network, which onlyreflects the loss cost of the network and does not depend on the reference node and the power flow model, thus being applicable to the power network with arbitrary structure.

Description

technical field [0001] The invention belongs to the field of power systems, and relates to a power transmission pricing method, in particular to a loss pricing method during electric energy transmission. Background technique [0002] The market-oriented reform of electricity has swept the world rapidly in the past 20 years. Marginal pricing of transmission losses, as an important guarantee for efficient economic dispatch of power systems and reasonable selection of access points for power sources and loads, has been widely used in domestic and foreign power markets. Inherently nonlinear, the theory and algorithms for marginal pricing of transmission losses are still severely lacking. [0003] The marginal loss electricity price of a certain node in the power grid should be calculated by multiplying the incremental loss of the node by the marginal energy price of the system. Usually, the micro-increasing loss can be calculated approximately by B coefficient, or precisely by...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R21/00G06F17/00G06F17/50G06Q50/00G06Q50/06
Inventor 彭建春江辉
Owner HUNAN UNIV