【摘要】：在電力市場機(jī)制下，供電企業(yè)除了要滿足用戶對供電可靠性的要求，，還應(yīng)盡可能地保證供電經(jīng)濟(jì)性。而實(shí)際上，供電可靠性與經(jīng)濟(jì)性是一對矛盾體。單純地以增加投資的方式來滿足供電可靠性難以保證經(jīng)濟(jì)性；同理，過度地限制投資又必將降低供電可靠性。所以在配電系統(tǒng)的規(guī)劃與改造過程中，將經(jīng)濟(jì)性和可靠性統(tǒng)一納入到供電模式研究中去是十分必要的。 通過對配電系統(tǒng)可靠性與經(jīng)濟(jì)性分析，本文從實(shí)際出發(fā)，在計(jì)算配電系統(tǒng)的可靠性指標(biāo)時(shí)，充分考慮元件的各種故障模式及其組合模式。根據(jù)配電系統(tǒng)中變電站與配電網(wǎng)絡(luò)結(jié)構(gòu)的差異，對變電站，提出了基于基本最小路割集的變電站可靠性評估算法。該算法根據(jù)變電站的拓?fù)浣Y(jié)構(gòu)，形成以元件為節(jié)點(diǎn)和以元件間的連接關(guān)系為邊的圖，然后通過路徑搜索算法形成以最小割集為單元的故障模式組合，最終獲得變電站的可靠性指標(biāo)。對配電網(wǎng)絡(luò)，提出基于開關(guān)元件二階分區(qū)的配電網(wǎng)可靠性評估算法。該算法首先以斷路器為分區(qū)元件對配電網(wǎng)絡(luò)進(jìn)行一次分區(qū)，然后以分段開關(guān)對所得的一階分區(qū)進(jìn)行二次分區(qū)，最后采用故障模式后果分析方法遍歷各分區(qū)故障及其對其他分區(qū)的影響，從而計(jì)算出各負(fù)荷點(diǎn)的可靠性指標(biāo)。最后分別對一簡單變電站和IEEERBTS測試系統(tǒng)中的bus6的一部分配電網(wǎng)絡(luò)進(jìn)行了仿真計(jì)算。 以求得的可靠性指標(biāo)為基礎(chǔ)，本文建立用戶停電損失模型，該模型考慮了與停電頻率有關(guān)的固定損失和與停電時(shí)間有關(guān)的停產(chǎn)損失。最后計(jì)算了四種不同接線結(jié)構(gòu)的變電站分別對不同類用戶供電時(shí)的成本與停電損失和IEEERBTS測試系統(tǒng)中的bus2所示的配電網(wǎng)采用不同的供電模式為用戶供電時(shí)的成本與損失，結(jié)果驗(yàn)證了本文提出的供電模式選型方案的有效性。
[Abstract]:Under the power market mechanism, the power supply enterprises should not only satisfy the customers' requirements of power supply reliability, but also ensure the economy of power supply as much as possible. In fact, power supply reliability and economy are a pair of contradictions. It is difficult to guarantee the economy to satisfy the reliability of power supply simply by increasing the investment. In the same way, too limited investment will certainly reduce the reliability of power supply. Therefore, it is necessary to integrate economy and reliability into the study of power supply mode in the process of distribution system planning and transformation. Based on the analysis of reliability and economy of distribution system, this paper takes into account all kinds of fault modes of components and their combination modes when calculating the reliability index of distribution system. According to the difference between substation and distribution network structure in distribution system, a substation reliability evaluation algorithm based on basic minimum cut set is proposed. According to the topology of the substation, the algorithm forms a graph with the node as the node and the connection relationship between the components as the edge, and then forms the fault mode combination with the minimum cut set as the unit by the path search algorithm. Finally, the reliability index of substation is obtained. For distribution network, a distribution network reliability evaluation algorithm based on second order partition of switch element is proposed. First, the circuit breaker is used as the partitioning element to partition the distribution network, and then the first order partition is partitioned by the piecewise switch. Finally, fault mode consequence analysis method is used to traverse the fault of each partition and its influence on other partitions, and then the reliability index of each load point is calculated. Finally, a part of distribution network of bus6 in a simple substation and IEEERBTS test system is simulated. Based on the reliability index, this paper establishes a model of power failure loss for users, which takes into account the fixed loss related to the frequency of power outage and the stoppage loss related to the time of power outage. Finally, the cost and loss of power supply for four substations with different wiring structures are calculated, respectively, and the costs and losses of different power supply modes for the distribution network indicated by bus2 in the IEEERBTS test system are calculated respectively. The results verify the effectiveness of the power supply mode selection scheme proposed in this paper.
【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM732

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本文編號：2267761