Method for optimizing active power output mode based on load margin maximization

Abstract

The invention relates to a method for optimizing electricity network output power in the technical field of electrical engineering, comprising the following steps: calling real-time data and net rack basic parameters of an SCADA database to form tidal data cross-section files; then calling load prediction system data and obtaining load growth mode of the next stage; converting the format of the tidal data cross-section files and the load prediction data to generate output mode optimized format data of the exertion mode of the generator; then carrying out optimization process on the exertion mode of the generator and outputting an optimum proposal; formulating an exertion plan of the generator according to the optimum proposal and implementing the generation exertion mode plan. In the invention, with the optimum proposal of the invention, the purpose of fast and effectively improving transmittable capacity of the power system and strengthening stability level of network voltage can be achieved for the power system transmission.

Description

technical field [0001] The invention relates to a method in the technical field of electrical engineering, in particular to a method for optimizing an active output mode based on load margin maximization. Background technique [0002] As the investment in new power supply and transmission equipment is restricted by economic and environmental conditions, and the load demand continues to grow, the transmission power of the power grid is getting closer and closer to its limit value. The static voltage stability problem has become one of the focuses of widespread attention. [0003] In order to improve the power transmission limit, many literatures have proposed improvement strategies from the perspective of reactive power, but the role of generator active output mode adjustment in voltage stability is rarely discussed. Compared with other reactive power control methods, the optimized active power output method has many incomparable advantages. First of all, as far as its contr...

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Problems solved by technology

However, since the deviation of the normal vector cannot accurately reflect the deviation between the output modes of the generator, the roughness of the correction direction leads to a very slow convergence speed

Especially when the output mode of the generator is adjusted to be close to the optimal value, the rough normal vector deviation almost loses its indication function, and it is difficult to adjust the output mode of the generator to the optimal state

In addition, in order to ensure the continuous increase of the load margin during the adjustment process of the active power output mode, the optimal output mode is gradually approached by means of a small step size, which greatly reduces the optimization efficiency

Finally, this paper takes the maximum total output of the generator as the optimization target, but since the active output mode under the maximum total power generation output may not be the output mode under the maximum load margin, the inappropriate objective function also seriously damages the optimization effect of the method

[0005] To sum up, there is currently no fast and effective active power output scheduling method to increase the power transmission limit

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