Optimal control method and system for energy storage system participating in power grid frequency modulation, and storage medium

An energy storage system and optimal control technology, applied in the direction of circuit devices, AC network circuits, AC network load balancing, etc., can solve the problem of less physical energy storage applications

Inactive Publication Date: 2021-04-06
JIANGSU ELECTRIC POWER CO +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] According to the U.S. Department of Energy (DOE) global energy storage project database statistics, currently the most widely used large-capacity energy storage for frequency regulation services is electrochemical energy storage, and physical energy storage is rarely used

Method used

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  • Optimal control method and system for energy storage system participating in power grid frequency modulation, and storage medium
  • Optimal control method and system for energy storage system participating in power grid frequency modulation, and storage medium
  • Optimal control method and system for energy storage system participating in power grid frequency modulation, and storage medium

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0152] Model parameters:

[0153] Considering the technical characteristics, output characteristics, and frequency modulation characteristics of thermal power units and energy storage systems, the parameters of the simulation model are set as follows:

[0154] Table 1. Parameters of dynamic simulation model for regional power grid frequency regulation

[0155] parameter value T g / s

0.08 T t / s

0.3 T r / s

10 T B / s

0.05 T p / s

10 K r

0.05 K p / Hz / p.u

50 K I

-0.027 K k

-0.1 B 0.42 R 2.5 K T

1 / 3600

[0156] The simulation model is built using the Matlab / simulink platform and the Matlab Function module. The installed capacity of the system is 1000MW, and the reference power is selected as 1000MW, and the initial state of charge of the energy storage is set to 50%. The variable range of energy storage SOC is controlled at 10% to 90%, the rated power of energy stor...

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Abstract

The invention discloses an optimal control method and system for an energy storage system participating in power grid frequency modulation, and a storage medium. The method comprises the following steps of (1) constructing a function suitable for reflecting frequency modulation operation cost of a thermal power generating unit and an energy storage system, (2) calculating a weight coefficient based on the power change rate and the SOC deviation, (3) establishing an AGC frequency modulation control target optimization function, (4) establishing AGC frequency modulation control constraint conditions, and solving the established AGC frequency modulation control objective optimization function by using a genetic algorithm to obtain an instruction distribution result of AGC instructions issued by the scheduling center between the thermal power generating unit and the energy storage system at each moment, and (5) establishing an energy storage auxiliary thermal power generating unit frequency modulation model, and obtaining a frequency deviation value, an energy storage system charge state, a fire storage frequency modulation instruction distribution result and an actual output value of the regional power grid at each moment. According to the method, the unit loss can be effectively reduced, and the frequency modulation response rate and quality are greatly improved.

Description

technical field [0001] The invention relates to an energy storage frequency modulation control method, system and storage medium, in particular to a genetic algorithm-based optimization control method for an energy storage system participating in power grid frequency modulation. Background technique [0002] Frequency is one of the important indicators to measure the power quality in the power grid. In order to maintain the safe and stable operation of power generation equipment and electrical equipment in the power system, it is necessary to keep the frequency of the power grid within a qualified range through various means. [0003] At present, in my country's power system, conventional thermal power units are mainly used to bear the basic load of the power grid, provide AGC frequency modulation services, and maintain the safety and stability of the power grid. However, due to the slow response speed of frequency modulation of conventional thermal power units, frequent sta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/48H02J3/32
CPCH02J3/48H02J3/32H02J2203/20
Inventor 王红星于国强周挺邹燕张天海罗凯明顾文
Owner JIANGSU ELECTRIC POWER CO
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