【摘要】：隨著電力系統(tǒng)電力電子化程度的不斷加深,近年來(lái)出現(xiàn)了多起機(jī)理不明的新的振蕩現(xiàn)象。提出了電力網(wǎng)絡(luò)諧振穩(wěn)定性的概念,試圖將上述機(jī)理不明的振蕩現(xiàn)象納入到電力網(wǎng)絡(luò)的諧振不穩(wěn)定范疇,從而基于線性網(wǎng)絡(luò)理論對(duì)眾多復(fù)雜振蕩現(xiàn)象進(jìn)行分析,為借助數(shù)學(xué)上完全成熟的線性系統(tǒng)理論解決電力系統(tǒng)實(shí)際問(wèn)題提供一條途徑。圍繞判斷諧振穩(wěn)定性的分析方法展開(kāi),通過(guò)引入電力網(wǎng)絡(luò)的s域節(jié)點(diǎn)導(dǎo)納矩陣,將電力網(wǎng)絡(luò)的諧振穩(wěn)定性問(wèn)題歸結(jié)為判斷s域節(jié)點(diǎn)導(dǎo)納矩陣行列式的零點(diǎn)在復(fù)平面上的分布問(wèn)題。首先,理論證明了s域節(jié)點(diǎn)導(dǎo)納矩陣行列式的零點(diǎn)就是系統(tǒng)的特征值。其次,給出了求解s域節(jié)點(diǎn)導(dǎo)納矩陣行列式零點(diǎn)的實(shí)部-虛部交叉迭代法。接著,推導(dǎo)了特定諧振模式下的節(jié)點(diǎn)電壓振型和參與因子矩陣,這2個(gè)指標(biāo)可用來(lái)定位特定諧振模式發(fā)生的位置。最后,通過(guò)算例展示了所提方法在分析電力網(wǎng)絡(luò)諧振穩(wěn)定性方面的有效性。
[Abstract]:With the deepening of electronization of electric power system, there have been many new oscillations with unknown mechanism in recent years. In this paper, the concept of resonance stability of power network is proposed, and the oscillation phenomenon with unknown mechanism is tried to be brought into the category of resonance instability of power network, and many complex oscillation phenomena are analyzed based on linear network theory. It provides a way to solve the practical problems of power system by means of the fully matured linear system theory in mathematics. By introducing the S-domain node admittance matrix of the power network, the analytical method of judging the resonance stability is developed. The resonance stability of power network is reduced to the problem of determining the distribution of zero point of admittance matrix determinant of node in s domain on the complex plane. Firstly, it is proved that the zero point of the determinant of the node admittance matrix in s domain is the eigenvalue of the system. Secondly, the real part-virtual part cross iteration method is given to solve the zero point of the admittance matrix determinant of node in s domain. Then, the nodal voltage mode and the participation factor matrix are derived, which can be used to locate the location of the specific resonant mode. Finally, an example is given to demonstrate the effectiveness of the proposed method in analyzing the resonance stability of power network.
【作者單位】： 浙江大學(xué)電氣工程學(xué)院;
【基金】：國(guó)家高技術(shù)研究發(fā)展計(jì)劃項(xiàng)目(863計(jì)劃)(2011AA05A119) 國(guó)家電網(wǎng)公司科技項(xiàng)目(柔性輸電網(wǎng)規(guī)劃評(píng)估方法及應(yīng)用關(guān)鍵技術(shù)研究)~~
【分類(lèi)號(hào)】：TM712

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本文編號(hào)：2142989