本文選題：三相四線制 + 有源電力濾波器�。� 參考：《安徽大學(xué)》2014年碩士論文

【摘要】：隨著電力電子技術(shù)的飛速發(fā)展,越來(lái)越多的非線性電力電子裝置被廣泛使用于各類場(chǎng)合。這些非線性電力電子裝置使得電力系統(tǒng)的電能質(zhì)量問(wèn)題變得越來(lái)越嚴(yán)重,由其產(chǎn)生的諧波、無(wú)功功率對(duì)電力系統(tǒng)造成了嚴(yán)重的危害。三相四線制并聯(lián)型有源電力濾波器是一種高效、穩(wěn)定、靈活的改善電能質(zhì)量的重要裝置,是目前治理電網(wǎng)污染,提高電網(wǎng)效率,確保電網(wǎng)和用電設(shè)備安全的最理想的設(shè)備,營(yíng)造了一個(gè)“綠色”的用電環(huán)境。本論文針對(duì)三相四線制并聯(lián)型有源電力濾波器的關(guān)鍵技術(shù)展開(kāi)了研究。 1.提出一種基于四階累積量的TAM電力系統(tǒng)諧波檢測(cè)方法。該方法以信號(hào)空間為模型,首先用蓋氏圓檢測(cè)出信號(hào)源數(shù),然后利用四階累積量定義的矩陣代替?zhèn)鹘y(tǒng)二階多信號(hào)分類法中的自相關(guān)矩陣做特征分解,將特征值對(duì)應(yīng)的特征向量分為信號(hào)子空間和噪聲子空間,再結(jié)合信號(hào)子空間和噪聲子空間的正交性以及子空間的旋轉(zhuǎn)不變性,估計(jì)出信號(hào)的頻率。最后采用總體最小二乘法(TLS)計(jì)算得到信號(hào)的幅值。仿真和試驗(yàn)驗(yàn)證了所提方法的合理性及可行性,為電力系統(tǒng)諧波的分析和治理提供了一種新的工具； 2.針對(duì)低壓配電系統(tǒng)三相四橋臂并聯(lián)型有源濾波器直流側(cè)電壓PI控制存在超調(diào)比較大、動(dòng)態(tài)響應(yīng)速度慢等缺點(diǎn),設(shè)計(jì)了一種采用模糊控制與PI控制相結(jié)合的模糊PI復(fù)合控制器。該控制器將輸入變量進(jìn)行模糊化,通過(guò)模糊推理控制模糊輸出變量,以此實(shí)現(xiàn)在線修改參數(shù)的目的。該控制器經(jīng)MATLAB仿真實(shí)驗(yàn)分析表明,該方法超調(diào)小、動(dòng)態(tài)響應(yīng)速度快,能滿足負(fù)載突變工況的要求,驗(yàn)證了所設(shè)計(jì)的模糊PI控制器的有效性和優(yōu)越性。
[Abstract]:With the rapid development of electric and electronic technology, more and more nonlinear power electronic devices are widely used in various occasions. These nonlinear power electronic devices make the power quality problem of power system become more and more serious. The harmonic and reactive power produced by them have caused serious harm to the electric power system. Three phase four wire system is used. The combined active power filter is an important device which is efficient, stable and flexible to improve the power quality. It is the most ideal equipment to control the pollution of the power grid, improve the efficiency of the power grid and ensure the safety of the power grid and the electrical equipment, and create a "green" power environment. This paper aims at the three-phase four wire shunt active power filter. The key technology has been studied.
1. a harmonic detection method for TAM power system based on the four order cumulant is proposed. The method uses the signal space as the model. First, the number of signal sources is detected by the gage circle. Then the matrix of the four order cumulant is used to replace the autocorrelation matrix in the traditional two order multi signal classification method, and the eigenvectors corresponding to the eigenvalues are divided. For the signal subspace and noise subspace, the frequency of the signal is estimated by combining the orthogonality of the signal subspace and the noise subspace and the rotation invariance of the subspace. Finally, the amplitude of the signal is calculated by the total least square method (TLS). The rationality and feasibility of the proposed method are verified by simulation and test, which is the harmonic of the power system. It provides a new tool for the analysis and management.
2. in view of the disadvantages of large overshoot and slow dynamic response speed in the DC side voltage PI control of three-phase four bridge arm shunt active filter in low voltage distribution system, a fuzzy PI composite controller which combines fuzzy control with PI control is designed. The controller uses the input variable into the line to paste the mode, and controls the fuzzy transmission by fuzzy reasoning. According to the MATLAB simulation experiment, the controller shows that the method has small overshoot and fast dynamic response speed, which can meet the requirements of the load abrupt condition, and verifies the effectiveness and superiority of the designed fuzzy PI controller.
【學(xué)位授予單位】：安徽大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM761.12;TN713.8

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