A new mathematical model and control of a three-phase AC-DC voltage source converter
A new mathematical model and control of a three-phase AC-DC voltage source converter
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DOI：
10.1109/63.554176
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发表时间：
1997
影响因子：
6.7
通讯作者：
V. Blasko;V. Kaura
中科院分区：
文献类型：
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作者：
V. Blasko;V. Kaura
在静止坐标系和同步坐标系下，建立了三相电压型换流器(VSC)功率电路的数学模型。然后利用该数学模型对VSC的电压和电流控制回路进行了分析和综合。推导了电流和电压调节器的增益和时间常数的解析计算公式。利用该数学模型对一台140kW的回热式变结构控制系统进行了控制。在电流调节器中采用同步坐标系模型定义前馈信号，以消除d相和q相之间的交叉耦合。它可以减少一阶对象的电流控制回路，并提高它们的跟踪能力。电流和电压控制回路的带宽分别比采样频率小约20倍和60倍。所有控制算法均在数字信号处理器中实现。所有的分析结果都得到了实验验证。
A new mathematical model of the power circuit of a three-phase voltage source converter (VSC) was developed in the stationary and synchronous reference frames. The mathematical model was then used to analyze and synthesize the voltage and current control loops for the VSC. Analytical expressions were derived for calculating the gains and time constants of the current and voltage regulators. The mathematical model was used to control a 140-kW regenerative VSC. The synchronous reference-frame model was used to define feedforward signals in the current regulators to eliminate the cross coupling between the d and q phases. It allowed the reduction of the current control loops to first-order plants and improved their tracking capability. The bandwidths of the current and voltage-control loops were found to be approximately 20 and 60 times (respectively) smaller than the sampling frequency. All control algorithms were implemented in a digital signal processor. All results of the analysis were experimentally verified.