本文選題：配電網(wǎng) + 合環(huán)操作��； 參考：《哈爾濱工業(yè)大學(xué)》2014年碩士論文

【摘要】：在電力系統(tǒng)中，配電網(wǎng)是與電力用戶(hù)關(guān)系最為緊密的部分，其供電可靠性問(wèn)題是電網(wǎng)公司和電力用戶(hù)都比較關(guān)注的問(wèn)題。當(dāng)配電網(wǎng)的某些線路需要檢修或出現(xiàn)故障要進(jìn)行倒負(fù)荷時(shí)，可通過(guò)合環(huán)操作來(lái)實(shí)現(xiàn)以避免電力用戶(hù)的短時(shí)停電，但是合環(huán)操作也可能會(huì)影響到電力系統(tǒng)的安全穩(wěn)定運(yùn)行，因?yàn)樵诖诉^(guò)程中可能會(huì)產(chǎn)生較大的穩(wěn)態(tài)電流和沖擊電流。 本文首先介紹了配電網(wǎng)合環(huán)的概念并將合環(huán)操作進(jìn)行了模式分類(lèi)，同時(shí)指明了在合環(huán)過(guò)程中產(chǎn)生合環(huán)電流的主要原因，并對(duì)配電網(wǎng)在執(zhí)行合環(huán)操作時(shí)所需滿(mǎn)足的一些首要前提進(jìn)行了說(shuō)明。 準(zhǔn)確的合環(huán)電流計(jì)算是合環(huán)操作能夠得以安全進(jìn)行的重要前提，因此本文通過(guò)對(duì)外部系統(tǒng)進(jìn)行等值建立了簡(jiǎn)化的配電網(wǎng)合環(huán)操作模型，，然后在此模型基礎(chǔ)上對(duì)合環(huán)電流的的計(jì)算方法進(jìn)行了研究。此外本文通過(guò)數(shù)學(xué)表達(dá)式的推導(dǎo)研究了影響合環(huán)電流產(chǎn)生的關(guān)鍵因素，同時(shí)以PSASP為平臺(tái)對(duì)某地電網(wǎng)的合環(huán)進(jìn)行了仿真，驗(yàn)證了合環(huán)點(diǎn)電壓幅值差和相角差對(duì)合環(huán)電流的影響。同時(shí)對(duì)配電網(wǎng)合環(huán)能否安全進(jìn)行的判斷條件進(jìn)行了研究，在此基礎(chǔ)了提出了減小合環(huán)電流的一些調(diào)整措施且對(duì)其靈敏度進(jìn)行了計(jì)算，并利用PSASP仿真工具對(duì)各種調(diào)控措施的實(shí)際效果進(jìn)行了仿真驗(yàn)證。 最后，本文結(jié)合某地油田電網(wǎng)的實(shí)際情況分析了其合環(huán)電流易越限的薄弱環(huán)節(jié)，并給出了相對(duì)應(yīng)的調(diào)整措施，對(duì)該油田電網(wǎng)的經(jīng)濟(jì)效益和社會(huì)效益產(chǎn)生了積極的影響。
[Abstract]:In the power system, the distribution network is the most closely related to the power users, its power supply reliability issues are concerned by both the power grid companies and power users. When some lines of the distribution network need to be overhauled or faulty, they can be realized by closed loop operation to avoid short term power outages, but the closed loop operation may also affect the safe and stable operation of the power system. In this process, large steady current and impulse current may be generated. This paper first introduces the concept of closed loop in distribution network and classifies the mode of closed loop operation. At the same time, it points out the main reasons for producing closed loop current in the process of closing loop. Some primary prerequisites for distribution network to be satisfied in the operation of closed loop operation are also explained. Accurate calculation of closed loop current is an important prerequisite for safe operation of closed loop operation, so a simplified closed loop operation model of distribution network is established by equivalent of external system. Then the calculation method of involutive loop current is studied on the basis of the model. In addition, the paper studies the key factors that affect the generation of loop current through the derivation of mathematical expression. At the same time, the paper simulates the loop of a local power network on the platform of PSASP, and verifies the influence of voltage amplitude difference and phase angle difference on the current of the closed loop. At the same time, the judging conditions of the safety of the closed loop in the distribution network are studied. On this basis, some adjustment measures to reduce the closing current are put forward and the sensitivity is calculated. The PSASP simulation tool is used to verify the actual effect of various control measures. Finally, combined with the actual situation of a certain oilfield power network, this paper analyzes the weak link of its closed loop current easily overrunning, and gives the corresponding adjustment measures, which have a positive impact on the economic and social benefits of the oil field grid.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TM711

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 楊小彬;李和明;尹忠東;蔣利民;孟s

本文編號(hào)：2092404