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Wind-fire collaborative frequency modulation method for high-proportion new energy power grid in consideration of heat storage dynamics

A new energy, high-proportion technology, applied in the direction of wind power generation, energy storage, electrical components, etc., can solve the problems of unfavorable simplified equivalence, unclear physical meaning, etc., and achieve the effect of compensating for mechanical power loss

Active Publication Date: 2022-03-04
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Literature "Zhang, H., Zhang, Y., Xie, Y. and Ma, C. (2020), Extending SFR model to incorporate the influence of thermal states on primary frequency response. IET Gener. Transm. Distrib., 14:4069 -4078." Neglecting the fuel replenishment link of the boiler, the linearized boiler was further simplified and reduced, and an extended SFR model considering the thermal state of the boiler was established. However, the physical meaning of each parameter in the model is not clear enough, which is not conducive to simplifying the equivalent value.

Method used

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  • Wind-fire collaborative frequency modulation method for high-proportion new energy power grid in consideration of heat storage dynamics
  • Wind-fire collaborative frequency modulation method for high-proportion new energy power grid in consideration of heat storage dynamics
  • Wind-fire collaborative frequency modulation method for high-proportion new energy power grid in consideration of heat storage dynamics

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Embodiment approach

[0042] In the case of an unable conflict, the embodiments and embodiments in the present invention can be combined with one another.

[0043]High proportion of new energy grids, with the decrease in the number of synchronous machines, the inertial power of the grid and the reduction of the power network are reduced, the same power deletion is increased, and the main steam flow dynamics may change significantly, and may result in The case of insufficient heat accumulation. The traditional SFR model ignores the slow boiler heat storage dynamics, it is believed that the main vapor pressure does not change, only the dynamics of the reeener will not be able to effectively describe the heat storage dynamics of the above scene and one frequency modulation effect. Thus, the present invention proposes a high-proportion of new energy grid considers the heat storage coordination frequency modulation method.

[0044] Noun explanation: SFR is the abbreviation of "System Frequency Response", Ch...

Embodiment 1

[0046] See Figure 8 As shown, the present embodiment discloses a high-proportion of new energy grid considers the thermal storage of the heat storage dynamics, including:

[0047] First, considering the same trend of the pressure in the boiler system, the transmission is fast, and the main steam pressure is one of the factors that determine the size of the main steam flow, the main steam pressure is a key parameter that describes the heat storage and heat storage dynamics of the boiler, Based on the traditional SFR model, an improved SFR model considering heat storage dynamics is considering the heat storage capacity.

[0048] Second, the improvement of the SFR model indicates that the heat storage coefficient will cause a significant decline in the pressure of the main steam, resulting in a significant decrease in mechanical power, based on this, put forward the wind and power conformance, by estimating the main vapor pressure of the system, increase the wind power Compensation o...

Embodiment 2

[0165] The object of this embodiment is to provide a computing device comprising a memory, a processor, a computer program stored on a memory and can run on a processor, the processor to perform the procedure of the process.

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Abstract

The invention provides a wind-fire cooperative frequency modulation method for a high-proportion new energy power grid considering heat storage dynamics, and the method comprises the steps: taking main steam pressure as a key parameter for describing the heat storage state and heat storage dynamics of a boiler, and building an improved SFR model considering the main steam pressure; and based on the established model, estimating the change of the main steam pressure through the power grid frequency, replacing the actual main steam pressure of the thermal power generating unit with the estimated main steam pressure, increasing the wind power based on the main steam pressure to assist the thermal power generating unit to perform primary frequency modulation, and making up the mechanical power reduction caused by the main steam pressure drop.

Description

Technical field [0001] The present invention belongs to the field of grid FM technology, in particular, to high-proportion of new energy grids, considering heat storage dynamics, the wind-resistant consequences. Background technique [0002] The statement of this section is merely the background technology information associated with the present invention, which is not necessarily constituted in prior art. [0003] As the proportion of new energy is getting higher and higher, on the one hand, due to the photovoltaic and dual feed, the turning inertia in the grid is reduced; on the other hand, due to some of the thermal power units, the fire generator group is caused by the power grid. The heat storage is reduced, and the rotation spare and one frequency modulation ability are reduced. When high-power disturbance occurs in the grid, the unbalance of power is exacerbated, the frequency drop is faster, the amplitude is greater, and the one-time frequency modulation task of the remai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/24H02J3/38H02J3/28
CPCH02J3/241H02J3/38H02J3/28H02J2300/28H02J2203/20Y02E10/76Y02E70/30
Inventor 张峰郭浩丁磊
Owner SHANDONG UNIV
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