本文選題：全電流補償消弧線圈 + 接地殘流�。� 參考：《中國礦業(yè)大學》2014年博士論文

【摘要】：隨著城市配電網(wǎng)容量的日益增大和非線性負荷及電纜線路的大量增加，接地故障殘余電流中的阻性和諧波電流成分隨之大幅提高。全電流補償消弧線圈可有效地解決這些成分的補償問題，，同時抑制電弧接地過電壓，保證配電網(wǎng)供電的安全性和可靠性。本文對全電流補償消弧線圈的關鍵技術展開研究。 為了得到接地殘流的真實數(shù)據(jù)，對數(shù)十個電網(wǎng)電容電流進行測試。以謝橋礦接地實驗為例進行分析和研究，給出了實驗結果和分析結論，作為以下各章內容的研究基礎。由于現(xiàn)有的對接地殘流的研究具有局限性，本文提出需先對雙諧波源的單相接地故障系統(tǒng)進行分析，從理論上研究諧波源類型和故障點位置對故障點諧波電壓和電流的影響。補償接地殘流的技術問題分別為殘流補償依賴選線結果與對地參數(shù)的估算和有源逆變裝置的使用會帶來系統(tǒng)的不穩(wěn)定，本文提出的利用系統(tǒng)零序電壓作為分析對象的檢測方法新思路可以解決這些問題。 單相接地故障系統(tǒng)模型的準確建立是實現(xiàn)零序電壓檢測的重要步驟。本文提出全電流補償消弧線圈系統(tǒng)的動態(tài)相量建模方法。該方法可以根據(jù)分析需要對模型進行變化，也可以有目的的選擇單一頻率進行分析。該建模方法不僅適用于接地故障電流暫態(tài)分量豐富的情況，而且可應用于含有電力電子裝置的全電流補償消弧線圈系統(tǒng)，仿真結果驗證了其可行性�，F(xiàn)有的暫態(tài)分析研究缺乏對暫態(tài)信號特征及故障信息的提取和利用方式方面的內容，本文對故障暫態(tài)信號進行頻域分析并對系統(tǒng)了進行仿真建模，目的在于得到暫態(tài)電壓和電流在不同頻段內的分布規(guī)律。 主從式全電流補償消弧線圈結構的本質是傳統(tǒng)消弧線圈和逆變器的并聯(lián)，針對主消弧線圈的不同類型，本文給出了全電流補償消弧線圈的主從控制思路，并提出了基于動態(tài)相量建模的全電流補償消弧線圈的無源性控制方法。該方法實現(xiàn)了零序電壓檢測且從全局尋求系統(tǒng)的穩(wěn)定，響應快速，形式簡單、魯棒性好。仿真和物理實驗驗證了其可行性與優(yōu)勢。 本文闡述了主消弧線圈分布安裝和增設從消弧線圈的必要性，提出了適合于分布安裝的全電流補償消弧線圈的結構，分析了其電氣性能并給出了相應的系統(tǒng)評價，對不同分布安裝方式下的系統(tǒng)做仿真對比實驗，結果表明分布安裝有助于降低接地殘流。最后給出了一款基于Matlab仿真環(huán)境下可以判斷孤立電網(wǎng)運行情況的軟件，該軟件可以動態(tài)地模擬含有各類分布式發(fā)電設備的孤網(wǎng)系統(tǒng)并對其能量進行分配與規(guī)劃。基于適合于分布式安裝的全電流補償消弧線圈的概念，給出了適用于孤網(wǎng)環(huán)境的全電流補償消弧線圈裝置的軟硬件設計。
[Abstract]:With the increasing capacity of urban distribution network, nonlinear load and cable line, the resistive and harmonic current components in the residual current of grounding fault are greatly improved. The full current compensated arc suppression coil can effectively solve the compensation problem of these components, at the same time restrain the arc grounding overvoltage, and ensure the safety and reliability of distribution network power supply. In this paper, the key technology of full current compensation arc suppression coil is studied. In order to obtain the real data of grounding residual current, dozens of grid capacitive currents are tested. Taking the grounding experiment of Xieqiao Mine as an example, the experimental results and conclusions are given, which are the basis of the following chapters. Due to the limitation of the existing research on the grounding residual current, this paper proposes that the single-phase grounding fault system with double harmonic sources should be analyzed first, and the influence of the type of harmonic source and the location of fault point on the harmonic voltage and current of the fault point is studied theoretically. The technical problems of compensating grounding residual current are that the residual current compensation dependent line selection results and the estimation of ground parameters and the use of active inverter device will lead to the instability of the system. In this paper, a new method of detecting zero sequence voltage can solve these problems. The accurate establishment of single-phase grounding fault system model is an important step to realize zero sequence voltage detection. A dynamic phasor modeling method for full current compensated arc suppression coil system is presented in this paper. The method can change the model according to the need of analysis, or select a single frequency to analyze it purposefully. This modeling method is not only suitable for the case where the transient components of the grounding fault current are abundant, but also can be applied to the full-current compensated arc-suppression coil system with power electronic devices. The simulation results show that the method is feasible. The existing research on transient analysis lacks the content of extracting and utilizing the transient signal characteristics and fault information. In this paper, the fault transient signal is analyzed in frequency domain and the system is simulated and modeled. The purpose of this paper is to obtain the distribution of transient voltage and current in different frequency bands. The essence of the master-slave full-current compensation arc-suppression coil is the parallel connection between the traditional arc-suppression coil and the inverter. In view of the different types of the main arc-suppression coil, the master-slave control idea of the full-current compensated arc-suppression coil is given in this paper. A passive control method for full current compensated arc-suppression coil based on dynamic phasor modeling is proposed. This method realizes zero-sequence voltage detection and seeks the stability of the system from the global perspective. The method has the advantages of fast response, simple form and good robustness. The feasibility and advantage of the method are verified by simulation and physical experiments. This paper expounds the necessity of the distribution installation of the main arc suppression coil and the addition of the slave arc suppression coil, puts forward the structure of the full current compensated arc suppression coil suitable for the distributed installation, analyzes its electrical performance and gives the corresponding system evaluation. The simulation results show that the distributed installation is helpful to reduce the grounding residual current. Finally, a software which can judge the operation of isolated power grid based on Matlab simulation environment is presented. The software can dynamically simulate the isolated network system with various distributed generation equipment and distribute and plan its energy. Based on the concept of a fully current compensated arc-suppression coil suitable for distributed installation, the hardware and software design of a fully current compensated arc-suppression coil device suitable for the isolated network environment is presented.
【學位授予單位】：中國礦業(yè)大學
【學位級別】：博士
【學位授予年份】：2014
【分類號】：TM475

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