Unit control mode dynamic conversion method based on real-time generation scheduling

Abstract

The present invention discloses a unit control mode dynamic conversion method based on real-time generation scheduling. The method comprises the steps of dividing the generating sets participating in real-time scheduling in a power grid into an adjusting unit, a buffer unit and a planning unit; evaluating the performance of the buffer unit comprehensively according to the adjustment capacity, the adjustment rate, the adjustment response time and the electric quantity complete schedule of the buffer unit; establishing an optimization model that the real-time generation scheduling and the real-time control are cooperative; solving the model by a mixed integer linear programming method, calculating the real-time plans of the generating sets and a control mode decision result of the buffer unit, and finally generating a conversion scheme of the control modes of the generating sets. The unit control mode dynamic conversion method based on the real-time generation scheduling of the present invention facilitates utilizing the adjustment capability of the generating sets fully, and enables the unit real-time control stationarity and orderliness to be improved.

Description

technical field [0001] The invention belongs to the technical field of electric power system dispatching automation, and relates to a method for dynamically converting unit control modes based on real-time power generation planning. Background technique [0002] The continuous changes in the operation mode of the power grid and the continuous improvement of demand forecast accuracy with the time scale determine that the production of the power grid is a gradual and refined process. The operation of the power system includes many links with different time scales, such as the day-ahead power generation plan, intraday rolling plan, real-time power generation plan, and automatic generation control (AGC). Through the coordinated operation of each link, the refined management level of the power grid is improved. [0003] AGC is an important technical means to ensure the balance of power generation and load at all times, and to maintain the frequency quality of the power system. I...

AI Technical Summary

Problems solved by technology

Since the control mode of the AGC unit is not considered in the real-time power generation plan, it will increase the control pressure of the AGC and affect the execution effect of the real-time power generation plan

[0005] At the same time, in the existing method, the dispatcher needs to switch the control mode of the AGC unit from time to time according to the system operation situation, and the workload and intensity are very large

For this reason, the dispatcher usually adopts a relatively conservative method, setting up more adjustment mode units in the system, which affects the economy of system operation and increases the difficulty of coordinated control among units with different performances

[0006] In order to solve the difference between power generation forecast and actual dispatching, the power system dispatching center in the prior art usually manually sets some generating units to switch control modes in real-time dispatching in the automatic power generation control link based on operating experience, so as to ensure the existence of the system. Adequate adjustment capability eliminates zone control errors

The manual setting method belongs to lag adjustment, which cannot effectively eliminate the difference in real-time operation of the power grid. It often needs repeated adjustments during operation, which makes it difficult to ensure the safety and economy of dispatching operation, affects the effect of real-time operation, and also brings problems to operators. huge workload

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