Power generation schedule optimization method taking hydroelectric generating set vibration area into account

Abstract

The invention belongs to the technical field of dispatching automation of an electric power system, and relates to a power generation schedule optimization method taking a hydroelectric generating set vibration area into account. The power generation schedule optimization method is based on current and real-time power generation schedule planned input and output data and includes the steps of reading the data of system load prediction, new energy prediction, the overhaul schedule, the section limit, set stop information, the set reference schedule and the information of sensitivity of a set to a monitoring element, taking various constraints including the system balance constraint, the set operating constraint, the network safety constraint, the set group constraint and the like into comprehensive consideration, maintaining the data of the output range of the hydroelectric generating set vibration area based on a common optimization model, introducing the constraints of the hydroelectric generating set vibration area and forming a mathematic model taking the constraints of the hydroelectric generating set vibration area into account. The optimization model makes a more reliable, effective and practical set output schedule, improves the execution efficiency of the set schedule, relieves the adjustment pressure of an AGC frequency modulation set and an AGC autonomous control set, improves the closed loop level of the current schedule, the real-time schedule and the AGC, and meets the increasingly lean large power grid safe operation requirement.

Description

technical field [0001] The invention belongs to the technical field of power system scheduling automation, and relates to a power generation plan optimization method considering the introduction of a hydroelectric unit vibration zone. 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] During the actual implementation 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-ahe...

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Problems solved by technology

However, since the day-ahead planning and real-time planning do not consider the vibration area of ​​hydropower units, if the unit output plan of the day-ahead planning and real-time planning falls within the output range of the vibration area, the AGC will not issue adjustment instructions, resulting in day-ahead and real-time planning. The unit output of is not executed

[0005] Assuming that a large number of hydropower unit output plans fall into the vibration zone in the real-time planning results, the unit output plans that track the output of the day-ahead and real-time planning results in the AGC will not be implemented, and large power deviations will occur. Power balance, this part of the deviation is borne by the system frequency modulation unit and the AGC self-controlled unit, which brings great adjustment pressure to the system frequency regulation unit and the AGC self-controlled unit

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