Method of building load shedding optimization model taking into consideration primary and second frequency modulation and minimum frequency deviation

A load reduction and optimization model technology, applied in the field of power generation and transmission systems

Inactive Publication Date: 2017-11-14
CHONGQING UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to address the deficiencies of the existing generation and transmission system load reduction optimization model, and propose a load reduction optimization model that considers primary and secondary frequency modulation and minimum frequency deviation: add frequency deviation in the objective function of the optimization model, and take the load The minimum weighted sum of the active power reduction and the square of the frequency deviation is used as th

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  • Method of building load shedding optimization model taking into consideration primary and second frequency modulation and minimum frequency deviation
  • Method of building load shedding optimization model taking into consideration primary and second frequency modulation and minimum frequency deviation
  • Method of building load shedding optimization model taking into consideration primary and second frequency modulation and minimum frequency deviation

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[0064] Below in conjunction with embodiment the present invention will be further described, but should not be interpreted as the above-mentioned scope of the present invention is limited to following embodiment. Without departing from the above-mentioned technical idea of ​​the present invention, various replacements and changes can be made according to common technical knowledge and customary means in this field, and all should be included in the protection scope of the present invention.

[0065] (1) Basic data preparation

[0066] The basic data of the system in this embodiment refers to the IEEE14 standard system. It is assumed that the random characteristics of the loads of each node obey the normal distribution, and its standard deviation is 5% of the expected value of the load of each node; the wind speed obeys the two-parameter Weibull distribution, and the scale parameter is 1.637 , with a shape parameter of 5.218. Refer to Table 1 for the value of wind farm-related...

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Abstract

The invention discloses a load shedding optimization model taking into consideration primary and second frequency modulation and minimum frequency deviation. Frequency deviation is added to an objective function of the optimization model, and the minimum weighted sum of the load active power reduction and the square of frequency deviation is taken as the objective function. A primary frequency modulation equation of a wind turbine unit and a secondary frequency modulation equation of an AGC unit are added to the equality constraints of the optimization model. The equality constraints of the optimization model include a frequency quality constraint, a node voltage amplitude constraint, unit active power and reactive power constraints, an AGC unit ramp constraint, a branch power constraint and a load node active power reduction constraint.

Description

technical field [0001] The invention belongs to the field of power generation and transmission systems, and aims to realize the calculation of the load reduction amount of the power generation and transmission system, and specifically relates to a load reduction optimization model considering primary and secondary frequency modulation and minimum frequency deviation. Background technique [0002] In recent years, the continuous expansion of wind power application scale and the rapid growth of power load demand have put forward higher requirements for the safe and reliable operation of power generation and transmission systems. The operational reliability level of the power generation and transmission system is directly affected by the real-time operating conditions such as the system frequency. If the frequency is too small or too large, it is not conducive to the safe, reliable and economical operation of the system, and will lead to system collapse in severe cases. Primary...

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Application Information

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IPC IPC(8): H02J3/14H02J3/24G06F17/50
CPCG06F30/20H02J3/14H02J3/24H02J2203/20Y02B10/30Y02B70/3225Y04S20/222
Inventor 余娟覃明星马梦楠郭林颜伟赵霞
Owner CHONGQING UNIV
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