基于超速和变桨优化协调的双馈风电机组一次调频控制

doi:10.16628/j.cnki.2095-8188.2021.10.004

摘要/Abstract

摘要：

随着风电并网容量的不断增加,新能源发电系统对风电参与调频提出了更高要求。由于双馈电机有功功率和频率解耦,无法提供支撑电网频率控制的有功备用功率,所以通过减载控制提前预留部分有功功率作为调频备用,但是超速和变桨控制在不同风况下具有一定的局限性。提出一种基于超速和变桨优化协调的一次调频控制策略,适应全风速工况,研究超速和变桨的优化组合方式,在不同风况下整定协调控制器参数,稳定地释放备用功率。仿真结果表明,所提出的方法比现有方法具有更优的调频性能,能够更好地减少弃风。

关键词: 双馈风电机组, 一次调频, 变桨和超速, 优化协调

Abstract:

With the increasing of the grid-connected capacity of wind power,the new energy generation system puts forward higher requirements for wind power to participate in frequency modulation.Because the doubly-fed wind turbines the active power and frequency are decoupled,the active standby power supporting the grid frequency control cannot be provided.Therefore,load reduction is carried out and part of active power is reserved in advance as standby for frequency modulation.However,overspeed and paddle change control have certain limitations under different wind conditions.In this paper,a primary frequency modulation control strategy based on optimal coordination of overspeed and variable paddle is proposed to adapt to the full wind speed condition.The optimal combination of overspeed and variable paddle is studied to adjust and coordinate controller parameters under different wind conditions to release standby power stably.The simulation results show that the optimization and coordination control method proposed in this paper has better frequency modulation performance than the existing method,can reduce wind abandon better.

Key words: doubly fed induction generator (DFIG), primary frequency modulation, variable paddle and overspeed, optimization and coordination

中图分类号:

TM315

张留生, 谢震, 许可宝, 张兴. 基于超速和变桨优化协调的双馈风电机组一次调频控制[J]. 电器与能效管理技术, 2021, 0(10): 18-27.

ZHANG Liusheng, XIE Zhen, Xu Kebao, ZHANG Xing. Primary Frequency Modulation Control of DFIG Based on Optimization and Coordination of Overspeed and Variable Paddle[J]. LOW VOLTAGE APPARATUS, 2021, 0(10): 18-27.

图/表 18

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表1

协调控制器变参数整定

v/(m·s^-1)	β/(°)	K_β	$ω mppt *$ /p.u.	ω_mppt/p.u.	K_β
6.0	0	0	0.87	0.81	1.50
6.5	0	0	0.94	0.87	1.75
7.0	0	0	1.01	0.95	1.78
7.5	0	0	1.08	1.01	1.83
7.9	0	0	1.14	1.07	1.90
8.5	2.3	11.5	1.20	1.15	1.25
9.3	2.8	14.0	1.20	1.18	0.50
9.7	3.0	15.0	1.20	1.20	0
10.0	2.1	10.5	1.20	1.20	0
11.0	1.7	8.5	1.20	1.20	0

表1

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表2

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图16

参考文献 21

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参数	数值
双馈风机额定功率/MW	2.0
额定风速/(m·s^-1)	12
发电机定子电阻/mΩ	7.8
定子d轴电感/H	1.42
定子q轴电感/H	2.75
发电机极对数	2
负荷1/WM	0.2
直流电压/V	1 100
网侧逆变器电感/mH	0.15e-3
网侧逆变器电容/μF	500e-6
同步电机额定功率/MW	2
同步电机额定电压/V	400
同步电机极对数	2
Z₁	(0.682+j0.483)%
Z₂	(1.432+j0.967) %
Z₃	(0.682+j0.241)%