Power grid minimum newly-increased reactive compensation capacity calculation method

Abstract

The invention relates to a power grid minimum newly-increased reactive compensation capacity calculation method. Based on a power gird load predicated value, the method takes a minimum power grid newly-increased reactive compensation capacity as a target function; meanwhile, reactive compensation minimum capacity out-of-limits of a capacitor and an electric reactor in Power System Voltage and Reactive Power Technology Guides, and constraint conditions including voltage upper and lower limits, line active tides and the like of a transformer substation bus under three operation manners including a highest load, a lowest load and a normal load are considered, and a whole model is decomposed into an upper-layer model capable of being directly solved by a linear planning algorithm and a lower-layer optimization model composed of non-linear constraint conditions through a layered optimization concept; a final optimized result meets the related technology guides through the continuous optimization between the two layers of models, and the voltage operation requirements of an electric power system are met under a plurality of load levels.

Description

technical field [0001] The invention belongs to the field of optimized configuration of reactive power compensation devices of a power grid, and relates to a method for calculating the minimum newly added reactive power compensation capacity of a power grid based on a layered optimization idea. Background technique [0002] The local and nearby balance of reactive power can ensure good voltage quality, but the lack and excess of reactive power are not conducive to maintaining voltage quality and safe operation of the power grid. [0003] For a long time, people's attention to voltage problems has generally focused on low voltage, large network loss and possible voltage collapse accidents caused by lack of reactive power. However, with the rapid development of the power grid, its characteristics have also changed accordingly, mainly reflected in the continuous strengthening of the upper main grid, the extensive use of cable lines in the urban power grid, and the large number ...

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Problems solved by technology

Some scholars also use the reactive power optimization algorithm based on the catastrophic genetic algorithm to perform reactive power optimization calculations on the lowest load valley flow section of the regional power grid under the small operation mode, and obtain a specific compensation plan including compensation points and compensation capacities at each point, but does not consider capacitors. Compensation capacity optimization for

In addition, on the basis of the principle of in-situ reactive power balance and layered balance, the researchers proposed an algorithm based on the concept of economic pressure difference, by analyzing the inherent relationship between active power loss caused by reactive power transmission, node voltage, and reactive power compensation Contact to optimize the reasonable configuration of reactive power compensation devices, but only applicable to the configuration of dynamic reactive power compensation devices

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