，分析了导抗变换器的特性，详细推导了整个系统各点电压、电流，提出一种新颖的三角波一三角波调制方法，该控制策略克服了采用传统正弦渡一三角波调制方法带来的并网电流谐波含量高、功率因数低的弊端。将导抗变换器和光伏并网逆变系统有机结合在一起，利用导抗变换器的电压源一电流源变换特性，将光伏电池阵列的直流电压变换为正弦包络线的高频电流，经过高频变压器隔离和电流等级变换，得到的高频电流再经过高频整流桥及工频逆变器逆变后并入电网。实现了电流源并网-a novel trangle modulation method is proposed based on immittance converter and PV grid connected inverter system.the characteristics of immitance converter are analyzed in depth and formulas of waveforms in the whole system are derived in detail