Predictor-corrector technology-based power loss calculation method of grid in future operation mode

Abstract

The invention discloses a predictor-corrector technology-based power loss calculation method of a grid in the future operation mode. The method comprises the following steps: performing the analysis and calculation of routine power flow according to the referenced grid power flow, determining an initial grid loss rate coefficient; then loading all kinds of planning data to preliminarily form a future operation mode of the grid, predicting the size of grid loss according to the grid loss rate coefficient in prediction stage, determining the total variation of bus loads, decomposing the total variation to each bus load; in the grid loss correction stage, adopting the computing mode of a multi-slack machine to perform the analysis and calculation of routine power flow, correcting the deviation of grid loss estimation, adopting the iteration of the prediction stage and the correction stage to finally obtain the calculation result of grid loss. By adopting the method of the invention, more accurate grid loss calculated value can be finally obtained to replace the former and approximate estimation value, thus more accurate operation mode of the grid can be obtained in the grid management planning and the safety and economy of the operation of the grid can be increased.

Description

technical field [0001] The invention belongs to the field of safety checking and analysis of power system dispatching plans, and relates to a method for calculating network loss in a future operation mode of a power grid based on prediction-correction technology. Background technique [0002] The most basic requirement of power grid dispatching is safe operation. With the rapid development of regional power grid interconnection, the scale and complexity of the power network are getting larger and higher, and the difficulty of power grid operation is becoming more and more difficult. The safety check function is an important line of defense for comprehensively analyzing the safety status of the power grid under various operating modes and ensuring the safety and stability of the extra-large power grid. The network loss of the power grid (referred to as the network loss) mainly includes the active power loss in the power line and the transformer. Power balance, increasing the...

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Problems solved by technology

[0003] In the grid power flow calculation, the usual processing of network loss is based on empirical settings, or approximate processing based on the network loss rate of the reference section, which is based on the assumption that the network loss rate changes little when there is no major change in the operation mode of the power grid. But in fact, in the process of planning, under different power generation methods and load distribution conditions, the network loss rate will have a large change, and the network loss level will also have a large difference, and the calculation deviation of the conventional method is relatively large.

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