An optimization method of power generation plan considering dead zone of unit regulation

Abstract

The invention discloses a power generation plan optimization method considering the unit adjustment dead zone. The method includes (1) maintaining and providing the operation data required by the power generation plan optimization model, and maintaining the minimum adjustment amount of the unit; (2) obtaining the latest power grid physical model and real-time mode data, start sensitivity calculation, and obtain sensitivity result information; (3) power generation plan optimization model reads system basic data, minimum adjustment amount and sensitivity result information; (4) reads all input data according to step (3), On the basis of the generation plan optimization model, the minimum adjustment constraint of the unit is introduced, that is, the minimum adjustment constraint is modeled to form an optimization model considering the dead zone of the unit regulation. The invention introduces the mathematical model constrained by the minimum adjustment amount of the unit, compiles a more reliable and effective unit output plan with a higher degree of practicality, improves the execution rate of the unit plan, and reduces the adjustment pressure of the AGC frequency modulation unit and the AGC autonomous control unit.

Description

technical field [0001] The invention relates to a method for optimizing a power generation plan considering a unit adjustment dead zone, and belongs to the technical field of power system scheduling automation. Background technique [0002] At present, with the widespread implementation of smart grid construction in China, according to the next day's electricity demand forecast, considering various constraints such as system balance constraints, unit operation constraints, power grid operation constraints, and network security constraints, the next day's 96-point unit combination plan is optimized. The practical level of the day-ahead power generation planning function of the power planning and output planning has been comprehensively improved. [0003] In the actual implementation process of the day-ahead plan, due to the large deviation between the day-ahead system load forecast and the day-ahead new energy forecast and the actual situation, the day-ahead output plan has b...

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Problems solved by technology

[0005] Since day-ahead planning and real-time planning do not take into account the unit adjustment dead zone, if the output adjustment of two points adjacent to the day-ahead plan and real-time planning is less than the adjustment dead zone, the AGC will not issue an adjustment command, resulting in day-ahead and real-time planning. The programmed unit output is not executed

Assuming that there are a large number of unit output fine-tuning in the real-time planning results, and the unit adjustment volume is smaller than the adjustment dead zone, but the total adjustment volume is too large, if the units that track the day-ahead and real-time planning results in the AGC do not execute, a large block of power will appear. The deviation, in order to ensure the balance of the system, is borne by the system frequency modulation unit and the unit independently controlled by AGC, which brings great adjustment pressure to the system frequency modulation unit and the unit independently controlled by AGC

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