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Coordinated wind power consumption regulation strategy of VMD thermal power generating unit and battery energy storage system

A technology of battery energy storage system and thermal power unit, which is applied in the direction of flexible AC transmission system, power network operating system integration, AC network voltage adjustment, etc., and can solve problems such as unsatisfactory, limited adjustment effect, complex adjustment algorithm, etc.

Pending Publication Date: 2021-09-07
STATE GRID LIAONING ELECTRIC POWER RES INST +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, after the new energy is connected to the grid, most of the adjustment of the equivalent load depends on a single thermal power unit, and its adjustment effect is limited. Although some areas have added controllable flexible loads for mixed adjustment, due to the introduction Its physical characteristics are complex, and its output characteristics different from those of thermal power units make the adjustment algorithm more complicated and unsatisfactory

Method used

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  • Coordinated wind power consumption regulation strategy of VMD thermal power generating unit and battery energy storage system
  • Coordinated wind power consumption regulation strategy of VMD thermal power generating unit and battery energy storage system
  • Coordinated wind power consumption regulation strategy of VMD thermal power generating unit and battery energy storage system

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Embodiment

[0096] Based on the load curve of a certain day in a certain place and the output of a wind power plant such as figure 2 shown, according to figure 2 It can be seen that the trend of the original system load is relatively stable. When wind power is not connected to the system, although there are sometimes relatively large fluctuations, it still maintains a relatively stable trend overall; when wind power is connected to the system, if figure 2 As shown in the middle curve, from time 0 to time 10, the load change trend has changed significantly compared with the original load change trend, and between time 10 and time 15, it can be seen that its peak-to-valley difference is compared with that of wind power It was larger before it was connected to the system. When simply using the thermal power unit to adjust the output parameters of the thermal power unit as shown in Table 1 for its equivalent load:

[0097] Table 1

[0098]

[0099] The CPLEX optimization solver in MA...

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Abstract

The invention discloses a coordinated wind power consumption regulation strategy for a VMD thermal power generating unit and a battery energy storage system, and the strategy comprises the steps: enabling wind power to serve as an equivalent load, connecting the equivalent load into the system, obtaining an equivalent load curve of the system, carrying out the variational mode decomposition of the equivalent load curve, and obtaining a high-frequency component, an intermediate-frequency component and a low-frequency component; adopting the thermal power generating unit, the battery energy storage system and the super capacitor for control and adjustment respectively; and finally, adopting MATLAB software for optimizing and solving the thermal power generating unit. Compared with traditional single thermal power generating unit adjustment, the method has a better effect, and has social benefits of energy conservation and emission reduction while having higher application value.

Description

technical field [0001] The invention belongs to the technical field of methods for improving wind power accommodation capacity, and in particular relates to a coordinated wind power accommodation regulation strategy for a VMD thermal power unit and a battery energy storage system. Background technique [0002] With the continuous development of renewable energy technology, its proportion in the power grid is increasing. The "China New Energy Power Generation Analysis Report (2020)" released by the State Grid Energy Research Institute shows that in 2019 my country's new energy power generation will increase The installed capacity is 56.1 million kW, accounting for 58% of the country's new installed capacity, surpassing the new installed capacity of thermal power for three consecutive years. As of the end of 2019, China's cumulative installed capacity of new energy power generation reached 410 million kW, an increase of 16% over the same period, accounting for 20.6% of the coun...

Claims

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Application Information

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IPC IPC(8): H02J3/32H02J3/48H02J3/38H02J3/14
CPCH02J3/32H02J3/48H02J3/381H02J3/144H02J2203/20H02J2300/28H02J2300/40H02J2207/50Y04S20/222Y02E70/30Y02E10/76Y02E40/10Y02B70/3225
Inventor 王顺江周桂平金奕丞刘闯王艺博戈阳阳凌兆伟王铎张潇桐句荣滨寿增赵军李典阳
Owner STATE GRID LIAONING ELECTRIC POWER RES INST
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