Abstract In order to solve the problem that the long cable variable voltage and variable frequency (VVVF) system does not adopt an effective capacitor voltage sharing control method, resulting in a poor effect of resonance overvoltage control, the resonance overvoltage control algorithm of the long cable VVVF system based on discrete mathematics is studied. First, the long cable frequency conversion drive system is established. In order to ensure voltage loss in the range of motor requirements, a frequency converter–cable–motor (ICM) system connection mode is used to maintain the system operation. Based on the research of the capacitor voltage balance control strategy of a long cable frequency conversion drive system, the discrete mathematical model of the AC side of the ICM system is established by using this control strategy. The improved constant active power controller is obtained by establishing the mathematical model, and the resonant overvoltage in a long cable frequency conversion drive is realized by using the constant active power controller. The experimental results show that the algorithm can effectively control the resonance overvoltage phenomenon in the long cable frequency control system, and the control accuracy is over 97%. It has good performance and can be applied in practice.

中文翻译：

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基于离散数学的长电缆变频驱动谐振过压控制算法

摘要 为解决长电缆变压变频（VVVF）系统未采用有效的电容器均压控制方式，导致谐振过压控制效果不佳的问题，提出了长电缆谐振过压控制算法研究了基于离散数学的VVVF系统。首先，建立长电缆变频驱动系统。为了保证电机要求范围内的电压损失，采用变频器-电缆-电机（ICM）系统连接方式来维持系统运行。在对某长电缆变频驱动系统电容电压平衡控制策略研究的基础上，利用该控制策略建立了ICM系统交流侧离散数学模型。通过建立数学模型得到改进的恒有功功率控制器，利用恒有功功率控制器实现长电缆变频驱动中的谐振过电压。实验结果表明，该算法能够有效控制长电缆变频调速系统中的谐振过电压现象，控制精度达到97%以上。它具有良好的性能，可以在实践中应用。控制精度达97%以上。它具有良好的性能，可以在实践中应用。控制精度达97%以上。它具有良好的性能，可以在实践中应用。