Phase synchronization and frequency tracking are essential part of control unit design for the grid -tie power converter of the efficient energy conversion system. A robust but straightforward algorithm has been proposed here using a digital zero-crossing detector (ZCD) circuit. The ZCD is made to be vigorous by a D-latched based implementation against the multiple zero-crossings in the synchronizing signal at the point of the common coupling (PCC). The corresponding unit vectors comprising of the sine and cosine components is synthesized using trigonometric orthogonal properties (TOP) and implemented using field programable gate array (FPGA) by backward Eular’s method. The proposed approach is simulated using Altera Quartus II IDE on a target device CycloneEP1C12Q240C8. The performance of the unit vectors has been tested on current-controlled pulse width modulated (PWM) power converter for seamless energy conversion. The paper includes the contextual review, description of the scheme, analysis, implementation and experimental validation. The analytical findings and experimental results are well agreeing

相位同步和频率跟踪是高效能量转换系统并网功率转换器控制单元设计的重要组成部分。这里使用数字过零检测器 (ZCD) 电路提出了一种稳健但直接的算法。ZCD 是通过基于 D 锁存的实现来对抗公共耦合 (PCC) 点同步信号中的多个零交叉的。由正弦和余弦分量组成的相应单位向量使用三角正交特性 (TOP) 合成，并通过后向 Eular 方法使用现场可编程门阵列 (FPGA) 实现。建议的方法是在目标器件 CycloneEP1C12Q240C8 上使用 Altera Quartus II IDE 进行仿真的。单位矢量的性能已经在电流控制的脉宽调制 (PWM) 功率转换器上进行了测试，以实现无缝能量转换。论文包括上下文回顾、方案描述、分析、实施和实验验证。分析结果和实验结果非常吻合