基于直挂储能控制的煤矿交直流混合配电网电压波动抑制研究

史小军; 于铄航; 王伟; 公铮

doi:10.13272/j.issn.1671-251x.2024090101

基于直挂储能控制的煤矿交直流混合配电网电压波动抑制研究

史小军^{1, 2,},
于铄航^{1, 2},
王伟^{1, 2},
公铮^3, ,

1.
中煤科工集团常州研究院有限公司，江苏常州　213015
2.
天地（常州）自动化股份有限公司，江苏常州　213015
3.
中国矿业大学电气工程学院，江苏徐州　221116

基金项目: 江苏省自然科学基金资助项目（BK20230108）；天地科技股份有限公司科技创新创业资金专项项目(2023-TD-ZD001-006，2024-TD-ZD017-01，2024-TD-ZD017-02)。

详细信息

作者简介:
史小军（1980—），男，江苏常州人，高级工程师，硕士，主要从事煤矿自动化系统研发及应用工作，E-mail：cari_shi@126.com

通讯作者:
公铮（1990—），男，山东泰安人，副教授，研究方向为电力电子与电力传动，E-mail：zgo@cumt.edu.cn。

中图分类号: TD608
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出版历程
- 收稿日期: 2024-09-29
- 修回日期: 2025-01-09
- 网络出版日期: 2024-12-05
- 刊出日期: 2025-01-24

Research on voltage fluctuation suppression in coal mine AC/DC hybrid distribution network based on directly-coupled energy storage control

SHI Xiaojun^{1, 2,},
YU Shuohang^{1, 2},
WANG Wei^{1, 2},
GONG Zheng^3, ,

1.
CCTEG Changzhou Research Institute, Changzhou 213015, China
2.
Tiandi(Changzhou) Automation Co., Ltd., Changzhou 213015, China
3.
School of Electrical Engineering, China University of Mining and Technology, Xuzhou 221116, China

摘要

摘要:
针对煤矿交直流混合配电网中因负载变化造成的直流母线电压波动问题，通常在直流母线处设置储能装置予以解决。现有的储能装置控制策略使得装置负担过重，且未考虑其荷电状态。针对煤矿交直流混合配电网的直流侧直挂储能拓扑，提出一种抑制母线电压波动的储能装置控制策略。经分析确定直挂储能装置工作于定功率模式，通过加入母线电压反馈进而调整储能装置出力的方式改进传统定功率控制策略，从而减小系统的不平衡功率；采用载波移相调制策略，以降低电流纹波；以荷电状态为对象进行排序均压，保证各储能子模块均匀充放电。在PSCAD/EMTDC中搭建煤矿交直流混合配电网仿真模型并进行实验，结果表明：在切除电动机或纯阻性负载突变情况下，母线电压波动率分别减小约70%和90%，验证了该控制策略可有效抑制母线电压波动，且蓄电池充放电速率为0.628C，满足快速响应要求。在实时数字仿真实验平台中进行硬件在环实验，结果与仿真结果一致，进一步验证了该控制策略的有效性。
- 煤矿供电系统 /
- 交直流混合配电网 /
- 直挂储能 /
- 电压波动抑制 /
- 定功率控制 /
- 载波移相调制 /
- 荷电状态
Abstract:
Voltage fluctuations on the DC bus caused by load variations are a common issue in coal mine AC/DC hybrid distribution networks. A typical solution involves installing energy storage devices on the DC bus, but existing control strategies often impose excessive stress on the devices and overlook their State of Charge (SOC). This study introduced a control strategy designed specifically for directly-coupled energy storage systems on the DC side of coal mine AC/DC hybrid networks to mitigate voltage fluctuations. The proposed strategy improved the conventional constant power control approach by integrating DC bus voltage feedback, enabling dynamic adjustments to the energy storage output, and reducing system power imbalances. A carrier phase-shift modulation method was applied to minimize current ripple, while a SOC-based sorting mechanism ensured balanced charging and discharging across energy storage submodules. To validate the strategy, a simulation model of the AC/DC hybrid distribution network was built using PSCAD/EMTDC. The results showed significant improvements: DC bus voltage fluctuation rates were reduced by approximately 70% during motor shutdowns and by 90% under sudden resistive load changes. The battery charge/discharge rate was controlled at 0.628C, meeting the fast-response requirements. Further validation was performed through hardware-in-the-loop testing on a real-time digital simulation platform, which demonstrated consistency with the simulation results, confirming the strategy's effectiveness.
- coal mine power supply system /
- AC/DC hybrid distribution network /
- directly-coupled energy storage /
- voltage fluctuation suppression /
- constant power control /
- carrier phase-shift modulation /
- state of charge

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图 1 煤矿交直流混合配电网拓扑结构

Figure 1. Topology structure of coal mine AC/DC hybrid distribution network

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图 2 直流侧直挂储能装置拓扑

Figure 2. DC side direct hanging energy storage topology

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图 3 4.5 kV直流母线等效电路

Figure 3. 4.5 kV DC bus equivalent circuit

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图 4 储能装置定直流电压控制原理

Figure 4. Constant DC voltage control principle of energy storage device

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图 5 传统的储能装置定功率控制原理

Figure 5. Traditional constant power control principle of energy storage device

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图 6 储能装置控制策略

Figure 6. Control strategy of energy storage device

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图 7 储能装置整体控制策略

Figure 7. Overall control strategy of energy storage device

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图 8 电动机2切除前后仿真结果

Figure 8. Simulation results before and after removal of motor 2

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图 9 纯阻性负载突变前后仿真结果

Figure 9. Simulation results before and after the sudden change of pure resistive load

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图 10 RT−LAB硬件在环实验平台

Figure 10. RT-LAB hardware in the loop（HIL） experiment platform

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图 11 电动机2切除前后实验结果

Figure 11. Experimental results before and after the removal of motor 2

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图 12 纯阻性负载突变前后实验结果

Figure 12. Experimental results before and after sudden change of pure resistive load

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表 1 仿真参数

Table 1 Simulation parameters

参数	值	参数	值
储能子模块数量	6	交流电动机有功功率/MW	0.8
蓄电池簇额定电压/V	1 024	交流电动机无功功率/Mvar	0.41
桥臂电感/mH	2	交流电动机额定转速/（r·min^–1）	1 495
蓄电池簇容量/（kW·h）	286	纯阻性负载/Ω	20.25

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表 2 2种工况下母线电压波动率对比

Table 2 Comparison of bus voltage fluctuation rate under two working conditions

工况	母线电压波动率/%
工况	不投入本文控制策略	投入本文控制策略
工况1	15.56	4.44
工况2	24.44	2.22

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