A Frequency Regulation Method of Energy Storage System Based on Adaptive Adjustment of Virtual Synchronous Generator Control Parameters

doi:10.12096/j.2096-4528.pgt.23035

Abstract

Abstract:

Objectives The large-scale penetration of wind power has reduced the frequency regulation capability of the power system to a certain extent.As a relatively mature and effective technical means, the energy storage system is widely used in power grid frequency regulation. Therefore, the response process and optimal configuration of energy storage system (ESS) participating in power grid frequency regulation under the control of virtual synchronous generator were studied. Methods Based on the simulation software DIgSILENT/PowerFactory, an ESS control model and typical power system were constructed to analyze the frequency response characteristics of the grid before and after the ESS participation. Furthermore, considering the reserve capacity of wind turbines under different output modes, the configuration results of the ESS were optimized by dividing the wind speed range and determining the wind turbine power reserve coefficient, so as to realize the adaptive adjustment of the frequency regulation coefficient of the ESS. Results The investment of the ESS can effectively improve the frequency response and reduce wind curtailment of the system. By reserving the frequency regulation capacity of wind turbines reasonably, the ESS can provide reliable power support for the power grid. Conclusions The self-adaptive adjustment method of the frequency regulation coefficient of the ESS based on the wind speed and the output power of fans can effectively reduce the overshoot and the output power of the ESS while meeting the frequency regulation requirements, thereby extending the working time.

Key words: double carbon, energy storage, new energy, wind power, virtual synchronous generator, frequency response, frequency regulation

CLC Number:

TK 02

Chong ZHANG, Bo LI, Xiaoyu LI, Hongbo LIU, Yongfa LIU. A Frequency Regulation Method of Energy Storage System Based on Adaptive Adjustment of Virtual Synchronous Generator Control Parameters[J]. Power Generation Technology, 2024, 45(4): 772-780.

Figures/Tables 12

Fig. 1 Characteristic curve of Cp

Fig. 2 Principle diagram of rotor overspeed control

Fig. 3 Structure diagram of rotor overspeed control

Fig. 4 VSG control structure diagram of ESS

Fig. 5 12-node power system

Fig. 6 Simulation waveform of the system after the maximum power increment

Fig. 7 Simulation waveform of the system after the maximum power shortage

Fig. 8 Simulation waveform of the system with ESS after the maximum power increment

Fig. 9 Simulation waveform of the system with ESS after the maximum power shortage

Fig. 10 Simulation waveform of the system after considering the participation of wind turbines in frequency regulation

Fig. 11 Frequency-active loop after optimizing VSG control parameters

Fig. 12 System simulation waveform before and after VSG control parameter optimization

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