Research on Control Strategy of Grid-connected Brushless Doubly-fed Wind Power System Based on Virtual Synchronous Generator Control

CES Transactions on Electrical Machines and Systems Pub Date : 2022-12-01 DOI:10.30941/CESTEMS.2022.00052

Shuai Liang;Shi Jin;Long Shi

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引用次数: 1

Abstract

The brushless doubly-fed wind power system based on conventional power control strategies lacks ‘inertia’ and the ability to support grid, which leads to the decline of grid stability. Therefore, a control strategy of brushless doubly-fed reluctance generator (BDFRG) based on virtual synchronous generator (VSG) control is proposed to solve the problem in this paper. The output characteristics of BDFRG based on VSG are similar to a synchronous generator (SG), which can support the grid frequency and increase the system ‘inertia’. According to the mathematical model of BDFRG, the inner loop voltage source control of BDFRG is derived. In addition, the specific structure and parameter selection principle of outer loop VSG control are expounded. The voltage source control inner loop of BDFRG is combined with the VSG control outer loop to establish the overall architecture of BDFRG-VSG control strategy. Finally, the effectiveness and feasibility of the proposed strategy are verified in the simulation.

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基于虚拟同步发电机控制的并网无刷双馈风电系统控制策略研究

基于传统功率控制策略的无刷双馈风电系统缺乏“惯性”和支撑电网的能力，导致电网稳定性下降。为此，本文提出了一种基于虚拟同步发电机（VSG）控制的无刷双馈磁阻发电机（BDFRG）控制策略来解决这一问题。基于VSG的BDFRG的输出特性类似于同步发电机（SG），可以支持电网频率并增加系统的“惯性”。根据BDFRG的数学模型，推导了BDFRG内环电压源控制。此外，还阐述了外环VSG控制的具体结构和参数选择原则。BDFRG的电压源控制内环与VSG控制外环相结合，建立了BDFRG-VSG控制策略的整体架构。最后，通过仿真验证了该策略的有效性和可行性。

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CES Transactions on Electrical Machines and Systems

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