基于二阶统一模型的分布式发电并网同步控制研究

doi:10.11930/j.issn.1004-9649.202305133

中国电力 ›› 2023, Vol. 56 ›› Issue (12): 41-50.DOI: 10.11930/j.issn.1004-9649.202305133

• 分布式智能电网的规划、运行和电力交易 • 上一篇下一篇

基于二阶统一模型的分布式发电并网同步控制研究

黄龑¹(), 郝迎鹏¹, 汪慧娴¹, 郑龙烨¹, 张凯哲²(), 许银亮²

1. 中国石油天然气股份有限公司规划总院，北京　100083
2. 清华大学清华大学深圳国际研究生院，北京　100084

收稿日期:2023-05-30 出版日期:2023-12-28 发布日期:2023-12-28
作者简介:黄龑（1980—），男，博士，中国石油研究所副所长，从事电力系统优化运行研究，E-mail： huangyan922@petrochina.com.cn
张凯哲（1997—），男，通信作者，博士研究生，从事新能源并网控制与电力系统优化研究，E-mail： zkz23@mails.tsinghua.edu.cn
基金资助:
中国石油十四五前瞻性、基础性科技课题（集中式天然气发电与风光储融合发展关键技术研究及示范应用，2021DJ5404）。

Research on Synchronization Control of Distributed Generation Based on Second-Order Unified Model

Yan HUANG¹(), Yingpeng HAO¹, Huixian WANG¹, Longye ZHENG¹, Kaizhe ZHANG²(), Yinliang XU²

1. China Petroleum Planning and Engineering Institute, Beijing 100083, China
2. Tsinghua Shenzhen International Graduate School, Tsinghua University, Beijing 100084, China

Received:2023-05-30 Online:2023-12-28 Published:2023-12-28
Supported by:
This work is supported by CNPC's 14th Five-Year Plan Forward-looking, Basic Science and Technology Project (Research and Demonstration Application of Key Technologies for Integrated Development of Centralized Natural Gas Power Generation and Solar Energy Storage, No.2021DJ5404).

摘要/Abstract

摘要：

现有的分布式发电逆变器并网同步控制主要分为电网跟踪型控制和电网支撑型控制2种模式。首先通过多时间尺度分离法，建立了电网跟踪型和电网支撑型同步控制的二阶统一模型。基于二阶统一模型，分析了跟网型和构网型控制的小信号稳定性，并指出跟网型控制与强电网兼容，而弱电网可以提高构网型控制的阻尼比。然后，分析了跟网型和构网型控制的暂态稳定性，并提出了一种通用的稳定性增强方法，以增强系统的同步稳定性。最后，通过实验测试，验证了所提改进型控制策略的有效性。

关键词: 分布式发电, 暂态稳定性, 电网跟踪型同步控制, 电网支撑型同步控制

Abstract:

The existing grid connection controls of distributed generation inverters are mainly classified into the grid-following (GFL) control and the grid-forming (GFM) control. In this paper, with the multi-timescale separation method, the second-order unified models of GFL and GFM synchronization control are established. Based on the unified models, the small-signal stabilities of GFL and GFM control are analyzed, pointing that GFL control is compatible with strong grid, while weak grid can improve the damping ratio of GFM control. Besides, the transient stabilities of GFL and GFM are analyzed, and a general stability-enhanced method is proposed to enhance the synchronization stability. Finally, these findings are corroborated by experimental tests.

Key words: distributed generation, transient stability, grid-following control, grid-forming control

黄龑, 郝迎鹏, 汪慧娴, 郑龙烨, 张凯哲, 许银亮. 基于二阶统一模型的分布式发电并网同步控制研究[J]. 中国电力, 2023, 56(12): 41-50.

Yan HUANG, Yingpeng HAO, Huixian WANG, Longye ZHENG, Kaizhe ZHANG, Yinliang XU. Research on Synchronization Control of Distributed Generation Based on Second-Order Unified Model[J]. Electric Power, 2023, 56(12): 41-50.

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链接本文: https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202305133

https://www.electricpower.com.cn/CN/Y2023/V56/I12/41

图/表 10

图 1 电网跟踪型同步控制电路和控制图

Fig.1 Circuit and control diagram of GFL control

图 2 电网支撑型同步控制

Fig.2 Control diagrams of GFM synchronization

图 3 ${v_{{\text{pcc}}q}}-\tilde \theta $ 的三角函数曲线

Fig.3 Sine curves of ${v_{{\text{pcc}}q}}-\tilde \theta $

图 4 电网支撑型控制的功角曲线

Fig.4 Power angle curves of GFM control

图 5 基于 RT-LAB 的硬件在环实验平台

Fig.5 RT-LAB-based hardware-in-loop platform

图 6 二阶统一模型的小信号验证结果

Fig.6 Validation results of small-signal second-order unified model.

图 7 GFL型控制的仿真结果

Fig.7 Simulation results for GFL control.

图 8 GFM型控制的仿真结果

Fig.8 Simulation results for GFM control.

图 9 所提出的GFM控制策略在电压跌落故障的仿真结果

Fig.9 Simulation results of the proposed GFM control under voltage sag fault.

图 10 文献[3]控制策略在电压跌落故障的仿真结果

Fig.10 Simulation results of the control method in Reference [3] under voltage sag fault.

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基于二阶统一模型的分布式发电并网同步控制研究

Research on Synchronization Control of Distributed Generation Based on Second-Order Unified Model

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基于二阶统一模型的分布式发电并网同步控制研究

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