【摘要】：基于逆變器的虛擬同步機(jī)(virtual synchronous generator,VSG)特性不但取決于控制策略,而且其等效方式及濾波電路對VSG動穩(wěn)態(tài)行為與模型準(zhǔn)確性的影響也是不可忽略的.本文重點(diǎn)對LCL濾波電路下不同等效方式的VSG特性進(jìn)行了分析對比,并發(fā)現(xiàn)將包含LCL濾波電路整體的VSG逆變器完全等效為同步發(fā)電機(jī)(synchronous generators,SG)建立的模型存在誤差,進(jìn)而提出一種VSG逆變器準(zhǔn)確建模的等效方法,通過該方法建立的模型在瞬態(tài)和穩(wěn)態(tài)響應(yīng)均可以與實(shí)際系統(tǒng)一致.仿真結(jié)果及其對比分析驗(yàn)證了所提方法的正確性和有效性.
[Abstract]:The characteristics of (virtual synchronous generator based on inverter not only depend on the control strategy, but also the effects of its equivalent mode and filter circuit on the dynamic steady-state behavior of VSG and the accuracy of the model can not be ignored. This paper focuses on the analysis and comparison of the VSG characteristics of different equivalent modes in the LCL filter circuit, and finds that there are errors in the model that the VSG inverter, which includes the whole LCL filter circuit, is completely equivalent to the synchronous generator (SG). Then an equivalent method for accurate modeling of VSG inverter is proposed. The model established by this method can be consistent with the actual system in both transient and steady state response. The simulation results and comparative analysis show that the proposed method is correct and effective.
【作者單位】： 合肥工業(yè)大學(xué)教育部光伏系統(tǒng)工程研究中心;
【基金】：臺達(dá)環(huán)境與教育基金會“電力電子科教發(fā)展計(jì)劃”重大項(xiàng)目(DREM2015002) 國家自然科學(xué)基金項(xiàng)目(51307042,51407057)資助~~
【分類號】：TM464
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本文編號：2176933