| 引用本文: | 刘建锋,李美玉,余光正,等.考虑VSC系统谐波稳定条件下的LCL滤波器参数优化设计方法[J].电力系统保护与控制,2020,48(13):80-90. |
| LIU Jianfeng,LI Meiyu,YU Guangzheng,et al.Optimization design method of LCL filter parameters considering harmonic stability of VSC system[J].Power System Protection and Control,2020,48(13):80-90 |
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| 摘要: |
| 可再生能源发电系统通常在逆变器出口处接入LCL滤波器以抑制高频谐波，然而在LCL滤波器的参数设计过程中，不合理的参数设计会加剧系统中的谐波不稳定问题。因此，通过结合LCL滤波器的外特性需求，并且综合考虑系统稳定性对滤波器的约束条件，建立以谐波衰减率最大、电感成本最小以及系统稳定性最好为目标函数的LCL滤波器参数多目标优化模型。在模型的求解过程中，针对单目标优化算法和传统的多目标优化算法存在设计目标单一、收敛性差和优化效果不佳等问题，提出采用MOEA/D多目标优化算法来求解。该算法利用权重向量的进化导向性以及子问题邻域的优势共享特征，保证了算法对最优解的寻优能力以及在目标空间上的均匀分布，以获得理想的pareto最优前沿，并进一步采用模糊隶属度函数定量分析其优化效果。最后，利用Matlab/Simulink软件对光伏并网系统中的电压源型逆变器(Voltage Source Converter, VSC)进行仿真。仿真结果充分表明所设计方案的有效性和适用性。 |
| 关键词: VSC系统 谐波不稳定 LCL滤波器参数设计 MOEA/D算法 模糊隶属度函数 |
| DOI：10.19783/j.cnki.pspc.190953 |
| 分类号: |
| 基金项目:国家自然科学基金青年科学基金项目资助(51807114) |
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| Optimization design method of LCL filter parameters considering harmonic stability of VSC system |
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LIU Jianfeng1,LI Meiyu1,YU Guangzheng1,LI Chenyang1,WANG Yalan2
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(1. School of Electrical Engineering, Shanghai University of Electric Power, Shanghai 200090, China;2. State Grid Hubei Electric Power Co., Ltd. Metrology Center, Wuhan 430075, China)
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| Abstract: |
| Renewable energy power generation systems usually connect the LCL filter at the outlet of the inverter to suppress high-frequency harmonics. However, in the parameter design process of the LCL filter, unreasonable parameter design will aggravate the problem of harmonic instability in the system. Therefore, by combining the external characteristic requirements of the LCL filter and considering the constraints of the system stability on the filter, the multi-objective optimization model of LCL filter parameters with the largest harmonic attenuation rate, the lowest inductance cost and the best system stability is established. In the process of solving the model, for the single target optimization algorithm and the traditional multi-objective optimization algorithm, there are problems such as single design goal, poor convergence and poor optimization effect, the MOEA/D multi-objective optimization algorithm is proposed. The algorithm utilizes the evolutionary orientation of weight vectors and the dominant sharing characteristics of subproblem neighborhoods to guarantee the ability of the algorithm to find the optimal solution and the uniform distribution in the target space, the purpose of which is to get the ideal pareto optimal frontier, then the fuzzy membership function is used to quantitatively analyze its optimization effect. Finally, the voltage source converter (VSC) in the photovoltaic grid-connected system is simulated by Matlab/Simulink software. The simulation results fully demonstrate the effectiveness and applicability of the proposed design. This work issupported by Youth Science Fund Project of National Natural Science Foundation of China (No. 51807114). |
| Key words: VSC system harmonic instability LCL filter parameter design MOEA/D algorithm fuzzy membership function |
