DC Voltage Compensation and Anti-overlimit Control Strategy for Hybrid Energy Storage System of Virtual Synchronous Generator
[Objective] This study addresses the issue of declining inertia power simulation accuracy and inertia support capability of the hybrid energy storage system based on DC voltage-grid frequency coupling control during severe fluctuations in grid frequency； a strategy involving DC voltage compensation...
Saved in:
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Editorial Department of Electric Power Construction
2025-08-01
|
| Series: | Dianli jianshe |
| Subjects: | |
| Online Access: | https://www.cepc.com.cn/fileup/1000-7229/PDF/1753435461951-39074434.pdf |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | [Objective] This study addresses the issue of declining inertia power simulation accuracy and inertia support capability of the hybrid energy storage system based on DC voltage-grid frequency coupling control during severe fluctuations in grid frequency； a strategy involving DC voltage compensation and anti-overlimit control is proposed. [Methods] The anti-overlimit control strategy utilizes the asymptotic nature of a hyperbolic tangent function to limit the maximum deviation of the DC voltage，and a linear correction coefficient is designed to ensure coupling linearity between the DC voltage and grid frequency. The DC voltage compensation control strategy employs a high-pass filter to compensate for the voltage deviations. The optimal cutoff frequency is determined by analyzing the influence of the filter cutoff frequency on the DC voltage recovery time and inertia simulation accuracy. The proposed control strategies are validated using an RTDS real-time simulation platform. [Results] Experimental results demonstrated that these control strategies prevented the DC voltage from exceeding the safe range during rapid grid frequency decline and gradually restored it to its rated value with variations in the grid frequency. [Conclusions] The proposed control strategy ensures that the virtual synchronous machine has good accuracy in the power simulation of inertia and inertia support capability. |
|---|---|
| ISSN: | 1000-7229 |