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Capacity allocation method for improving frequency modulation performance of power plant

A technology of capacity allocation and energy storage capacity, which is applied in the direction of circuit devices, electrical components, AC network circuits, etc., and can solve the problems of low practicability

Active Publication Date: 2018-01-12
SOUTHEAST UNIV
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Problems solved by technology

In the existing energy storage participating in grid frequency regulation, it is rarely combined with existing policies and has low practicability

Method used

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  • Capacity allocation method for improving frequency modulation performance of power plant
  • Capacity allocation method for improving frequency modulation performance of power plant
  • Capacity allocation method for improving frequency modulation performance of power plant

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Embodiment Construction

[0124] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0125] Such as figure 1 As shown, the present invention provides a capacity allocation method for improving the frequency regulation performance of power plants. This method provides a charging and discharging strategy for energy storage participating in frequency regulation of power plants. On this basis, an economic model is established to calculate the storage capacity of power plant can optimize capacity. Specifically include the following steps:

[0126] Step 1. According to the assessment indicators of AGC (Automatic Generation Control) in the "Two Detailed Rules", a specific calculation method for the three indicators of adjustment speed, adjustment accuracy and response time is proposed.

[0127] Step 1.1, the adjustment rate index K of the computer group 1

[0128] Such as figure 2 Middle T 1 -T 2 and T 4 -T 5 time period,...

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Abstract

The invention discloses a capacity allocation method for improving frequency modulation performance of a power plant. The method comprises proposing a specific calculation method of the indexes such as the adjusting rate, the adjusting precision and the response time according to the evaluation indexes of AGC in the two detailed regulations; proposing energy storage, charging and discharging strategies for improving various indexes of the frequency modulation in different stages; calculating the income of energy storage participating in the frequency modulation of the power plant; calculatingthe cost of energy storage participating in the frequency modulation of the power plant, and meanwhile, considering the influence on the service life of the energy storage frequent action; establishing an energy-storage frequency-modulation economical model; taking the maximum net income as a target function and calculating the energy storage capacity with the largest net income by adopting a differential evolution algorithm. According to the method disclosed by the invention, the Kp value can be calculated more accurately, the foundation is laid for the subsequent charge and discharge strategy making and effectiveness calculation, and the AGC performance of the power plant can be remarkably improved, the corrected service life is brought into an energy storage cost item, and the differential evolution algorithm is adopted to calculate the optimal capacity and the maximum net income of the system configuration energy storage.

Description

technical field [0001] The invention relates to an energy storage frequency regulation method, in particular to a capacity allocation method for improving the frequency regulation performance of a power plant. Background technique [0002] The grid-connection of large-scale new energy has relieved the power shortage, but its intermittency and uncertainty have seriously affected the power quality of the grid. Among them, frequency, as an important index of power quality, has a key influence on the stable operation of power system. [0003] In my country, the response speed and accuracy of traditional units are limited, which cannot fully meet the current frequency regulation needs. As an emerging industry, energy storage has been more and more widely recognized in the world power frequency regulation market. [0004] Considering that energy storage participates in frequency regulation of power plants, optimal economy is the primary goal. In the existing energy storage part...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02J3/28G06F17/50
CPCY02E60/00
Inventor 陈丽娟姜宇轩许晓慧
Owner SOUTHEAST UNIV
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