基于虚拟惯量控制的新型电力系统功率差前馈振荡抑制方法

doi:10.11930/j.issn.1004-9649.202312027

中国电力 ›› 2024, Vol. 57 ›› Issue (4): 68-76.DOI: 10.11930/j.issn.1004-9649.202312027

基于虚拟惯量控制的新型电力系统功率差前馈振荡抑制方法

王雪¹(), 刘林¹(), 卓庆东², 张海鹏², 杨苓², 许方园²(), 曹雨晨¹

1. 国网能源研究院有限公司，北京　102209
2. 广东工业大学自动化学院，广东广州　510006

收稿日期:2023-12-08 录用日期:2024-03-07 发布日期:2024-04-23 出版日期:2024-04-28
作者简介:王雪（1978—），男，硕士，高级工程师，从事能源互联网、新型电力系统等研究，E-mail：wangxue@sgeri.sgcc.com.cn
刘林（1982—），男，博士，高级工程师（教授级），从事能源互联网、新型电力系统等研究，E-mail：liulin@sgeri.sgcc.com.cn
许方园（1984—），男，通信作者，博士，副教授，硕士生导师，从事电力系统分析、电力市场、人工智能在电力系统的应用等研究，E-mail：datuan12345@hotmail.com
基金资助:
国家电网有限公司科技项目（新型电力系统下系统惯量计量、商业模式及关键技术研究，1400-202357351A-1-1-ZN）。

Power Difference Feed-forward Oscillation Suppression Method for New Power System Based on Virtual Inertial Control

Xue WANG¹(), Lin LIU¹(), Qingdong ZHUO², Haipeng ZHANG², Ling YANG², Fangyuan XU²(), Yuchen CAO¹

1. State Grid Energy Research Institute Co., Ltd., Beijing 102209, China
2. School of Automation, Guangdong University of Technology, Guangzhou 510006, China

Received:2023-12-08 Accepted:2024-03-07 Online:2024-04-23 Published:2024-04-28
Supported by:
This work is supported by the Science and Technology Project of SGCC (Research on Key Technologies of System Inertia Metering and Commerical Modes under New Power System, No.1400-202357351A-1-1-ZN).

摘要/Abstract

摘要：

为了解决新型电力系统的低惯量、弱阻尼问题，虚拟同步发电机技术备受关注。但虚拟同步发电机在为系统提供惯量和阻尼的同时，也使得系统在受扰动影响时产生有功振荡问题，并且容易产生稳态误差。为此，提出基于虚拟惯量控制的新型电力系统功率差额前馈振荡抑制方法，优化虚拟同步发电机控制，有效地减小了系统在扰动下产生的有功功率和频率冲击，改善了系统的动态稳定性。同时，分别建立常规控制、普通微分前馈控制和功率差前馈控制等控制策略的有功闭环小信号模型，并给出相关参数设计方法。仿真验证表明，所提策略对解决动态振荡、稳态误差问题的有效性与优越性。

关键词: 新型电力系统, 有功振荡, 频率超调, 根轨迹分析, 参数整定

Abstract:

To solve the problem of low inertia and weak damping in the new power system, virtual synchronous generator technology has attracted much attention. However, while the virtual synchronous generator provides inertia and damping for the system, it also causes the system to generate active oscillation when affected by disturbance, and it is easy to produce steady-state errors. Therefore, this paper proposes a power difference feedforward oscillation suppression method for a new power system based on virtual inertial control to optimize the control of a virtual synchronous generator. This effectively reduces the influence of active power and frequency generated under disturbance and improves the dynamic stability of the system. Meanwhile, the active closed-loop small-signal models of conventional control, differential feedforward control, and power difference feedforward control are built respectively, and the relevant parameter design methods are given. The effectiveness and superiority of the proposed strategy in solving dynamic oscillation and steady-state error problems are verified through simulation.

Key words: new power system, active oscillation, frequency overshoot, root locus analysis, parameter tuning

王雪, 刘林, 卓庆东, 张海鹏, 杨苓, 许方园, 曹雨晨. 基于虚拟惯量控制的新型电力系统功率差前馈振荡抑制方法[J]. 中国电力, 2024, 57(4): 68-76.

Xue WANG, Lin LIU, Qingdong ZHUO, Haipeng ZHANG, Ling YANG, Fangyuan XU, Yuchen CAO. Power Difference Feed-forward Oscillation Suppression Method for New Power System Based on Virtual Inertial Control[J]. Electric Power, 2024, 57(4): 68-76.

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链接本文: https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202312027

https://www.electricpower.com.cn/CN/Y2024/V57/I4/68

图/表 10

图 1 VSG典型控制结构

Fig.1 Typical control structure of VSG

图 2 VSG有功闭环控制框图

Fig.2 Active power closed-loop control block of VSG

图 3 不同Jp的VSG在Dp变化时的有功闭环小信号模型零极点分布

Fig.3 Pole-zero distribution of active power closed-loop small-signal model for VSG with different Jp when Dp changes

表 1 仿真实验参数

Table 1 Simulation experiment parameters

参数	取值	参数	取值
U_dc/V	800	P_load/kW	50
E₀/V	311	f₀/Hz	50
R_f/Ω	0.05	J_p/(kg·m²)	5
L_f/mH	4	D_p/(N·m)	0
C_f/μF	10	J_q	0.05
R_g/Ω	0.05	k_f/(rad·W^–1)	30
L_g/mH	1.2	T/s	0.01
P_ref/kW	100	k_t	0.08
Q_ref/(kV·A)	10	k_d	0.08

图 4 改进的VSG有功控制闭环框图

Fig.4 Active power closed-loop control block of improved VSG

图 5 NDFC在kd变化时的有功闭环小信号模型零极点分布

Fig.5 Pole-zero distribution of active power closed-loop small-signal model of NDFC with variable kd

图 6 PDFC参数变化时的有功闭环小信号模型零极点分布

Fig.6 Pole-zero distribution of active power closed-loop small-signal model with variable PDFC parameters

图 7 测试工况1仿真验证对比结果

Fig.7 Comparative simulation results of test condition 1

图 8 测试工况2仿真验证对比结果

Fig.8 Comparative simulation results of test condition 2

表 2 不同控制策略下VSG的主要响应指标

Table 2 Main response indicators of VSG in different control strategies

控制策略	有功设定值阶跃			电网频率跌落
控制策略	有功超调量/%	频率最大值/Hz	调节时间/ s	有功超调量/%	稳态误差值/kW	频率最低点/Hz	调节时间/ s
C-VSG (D_p=0)	23.5	50.75	2.4	2.90		49.928	1.60
C-VSG (D_p=30)	9.0	50.54	1.3	0.94	3	49.945	0.70
NDFC	6.5	50.52	1.2	0.97		49.945	0.55
PDFC		50.19	0.4	0.97		49.947	0.35

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基于虚拟惯量控制的新型电力系统功率差前馈振荡抑制方法

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基于虚拟惯量控制的新型电力系统功率差前馈振荡抑制方法

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