A method and system for calculating flexible transformationtransformation capacity of thermal power unit

Abstract

The invention relates to a method and system for calculating flexible transformation capacity of a thermal power unit. The method comprises: based on the theoretical power model of renewable energy generation in the target year, a target annual renewable energy waste rate range is determine according to that system flexibility to adjust the capacity range, according to the range of renewable energy discarding rate in the target year, and then determine the flexibility transformation capacity of the thermal power unit according to the flexibility demand capacity of the whole power network, themethod overcomes the problem that the prior art is easy to be transformed into insufficient scale or too much capacity, Considering the relationship between the demand of flexible transformation capacity and the installed capacity of renewable energy, the calculation method mentioned above can effectively calculate the flexible transformation capacity of thermal power units, and realize the coordinated optimization of the transformation capacity and the installed capacity of renewable energy.

Description

Technical field [0001] The invention relates to the field of coordinated control of renewable energy power stations, in particular to a method and system for calculating the flexible transformation capacity of a thermal power unit. Background technique [0002] With the increasing installed capacity of renewable energy (mainly including wind power and solar power), the randomness, volatility and intermittent characteristics of wind power and solar power have also become more and more prominent. When the flexibility of the power system is insufficient Time will lead to abandonment of wind and solar, and the flexibility of the power system is mainly reflected in the flexibility of thermal power units to adjust capacity. Statistics show that the abandonment of wind and solar in common thermal power areas mainly occurs in the winter heating period, and the flexibility of thermal power Insufficiency is the main reason for the abandonment of wind and solar. The operating characteristic...

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Problems solved by technology

[0002] As the installed capacity of renewable energy (mainly including wind power and solar power) is getting higher and higher, the characteristics of randomness, volatility and intermittency of wind power and solar power generation are also becoming more and more obvious. When the power system is not flexible enough Wind and solar curtailment will occur at times, and the flexibility of the power system is mainly reflected in the flexible adjustment capacity of thermal power units. Statistics show that the curtailment of wind and solar in areas commonly used by thermal power mainly occurs during the winter heating period, and the flexibility of thermal power Insufficiency is the main reason for the abandonment of wind and light. The operating characteristics of the existing pure condensing (conventional thermal power) / heating units and the way of independent dispatching of electricity and heat limit the flexibility of the power system. The primary reason for the difficulty of energy consumption; therefore, promoting the flexibility transformation of conventional thermal power and heating units has become a key measure to promote the consumption of renewable energy

[0003] The existing studies on the flexibility transformation of thermal power units mainly focus on the transformation effect of thermal power units and the related benefits obtained from participating in the power auxiliary service market after the transformation of the units, and there are problems of insufficient transformation scale or excessive transformation capacity

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