Efficiency control method based on constraint function

Abstract

The invention provides an efficiency control method based on a constraint function. The method comprises a step of dividing a system into two layers including an energy layer and an equipment layer, fitting a comprehensive efficiency curve according to the actual efficiency of the wind and solar storage at a grid connection point at the energy layer to be a basis for efficiency optimization, a step of fitting a load torque and power curve according to the periodic change of a rod pumping well load, a step of comparing the efficiency change of a wind power converter, a photovoltaic inverter andan energy storage converter in real time by using a look-up table method and solving a power supply resource with highest efficiency satisfying a load change, a step of considering switching loss, power / efficiency characteristics, line loss and stray loss and controlling comprehensive efficiency optimization under a model in the equipment layer, and a step of constructing a constraint control function to optimize the control efficiency such that the efficiency is maximized. According to the control method provided by the invention, the utilization rate of equipment can be greatly improved, the high investment of a complex energy management system is compensated, and the efficiency maximization of a rod pumping well system in the use of new energy can be achieved.

Description

technical field [0001] The invention relates to the technical field of distributed new energy power generation, in particular to an efficiency control method based on a constraint function. Background technique [0002] With the rise of "Industry 4.0" and "Made in China 2025", traditional industries are facing huge challenges. The widespread use of new energy sources such as wind and solar storage is an important means to achieve energy saving, emission reduction and benefit improvement. The geographical distribution of pumping wells in oilfields is quite different, and the environment for power consumption is harsh. In order to reduce line losses, pumping wells are often powered by transformers and then used by motors. Moreover, since the power factor is generally around 0.3 to 0.4, the investment in reactive power compensation equipment is too large, coupled with the power adjustment costs of the power supply department, which greatly increases the cost of oil production. ...

AI Technical Summary

Problems solved by technology

Moreover, since the power factor is generally around 0.3 to 0.4, the investment in reactive power compensation equipment and other equipment is too large. In addition, the power adjustment cost of the power supply department greatly increases the cost of oil production.

In particular, pumper well systems are generally inefficient and present one of the greatest burdens of high production costs

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