本文選題：并網(wǎng)逆變器 + 電網(wǎng)等效阻抗��； 參考：《太陽能學報》2015年09期

【摘要】：提出一種并網(wǎng)逆變器基波線路阻抗的精確檢測策略,該方法不但考慮到各分布式發(fā)電單元(distributedgeneration,DG)到公共耦合點(point of common coupling,PCC)的線路阻抗,還可分析PCC到主電網(wǎng)的線路阻抗和電網(wǎng)阻抗(電網(wǎng)等效阻抗)。該方法在虛擬單機等效模型的基礎(chǔ)上,結(jié)合并網(wǎng)逆變器的下垂控制,通過給參考電壓施加擾動,檢測出系統(tǒng)中電壓和電流變化量,通過分析線路阻抗和電網(wǎng)等效阻抗相關(guān)的電壓回路方程獲取阻抗參數(shù)。仿真和實驗驗證該策略的正確性和可行性。
[Abstract]:An accurate detection strategy for fundamental impedance of grid-connected inverters is proposed. This method not only takes into account the line impedance of distributed generation units (DGs) to the common coupling point of common coupling (PCCs). The line impedance and network impedance of PCC to the main power network can also be analyzed. Based on the virtual single-machine equivalent model and the droop control of grid-connected inverter, the voltage and current changes in the system are detected by disturbing the reference voltage. The impedance parameters are obtained by analyzing the voltage loop equation related to the line impedance and the grid equivalent impedance. Simulation and experiment verify the correctness and feasibility of the strategy.
【作者單位】： 燕山大學電力電子節(jié)能與傳動控制河北省重點實驗室;
【基金】：國家自然科學基金(51077112) 河北基金(E2012203163)
【分類號】：TM464
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本文編號：1787475