本文選題：靜態(tài)安全分析　切入點(diǎn)：潮流計(jì)算　出處：《吉林大學(xué)》2017年碩士論文

【摘要】：電力能源是一個(gè)國(guó)家工業(yè)發(fā)展的基礎(chǔ),國(guó)民經(jīng)濟(jì)發(fā)展的命脈,是國(guó)計(jì)民生的基本保障,電力安全直接關(guān)系著國(guó)民經(jīng)濟(jì)的健康發(fā)展和社會(huì)的長(zhǎng)治久安。近些年來(lái),我國(guó)電力系統(tǒng)向大機(jī)組、大電網(wǎng)、大容量、遠(yuǎn)距離輸電發(fā)展,逐步建設(shè)完善特高壓電網(wǎng)骨干網(wǎng)架,統(tǒng)籌各個(gè)電壓等級(jí)的堅(jiān)強(qiáng)網(wǎng)架建設(shè)。新建發(fā)輸變電工程如火如荼地進(jìn)行著,電力事故也常有發(fā)生,本文針對(duì)電力網(wǎng)絡(luò)擴(kuò)建及并網(wǎng)過(guò)程中可能出現(xiàn)影響網(wǎng)絡(luò)穩(wěn)定運(yùn)行的問(wèn)題,研究了靜態(tài)安全分析方法。論文主要工作如下:1.研究了電力網(wǎng)絡(luò)各個(gè)元件的結(jié)構(gòu)及數(shù)學(xué)模型,歸納總結(jié)了潮流計(jì)算的數(shù)學(xué)模型、牛頓-拉夫遜潮流計(jì)算方法的基本原理和計(jì)算步驟。2.研究了電網(wǎng)靜態(tài)安全分析基本原理及方法,總結(jié)概括了電網(wǎng)靜態(tài)安全分析的工作流程及具體實(shí)施辦法,主要包括:負(fù)荷預(yù)測(cè)、電力平衡、潮流運(yùn)行方式選擇、靜態(tài)安全分析等。3.選擇某工程實(shí)例,對(duì)該電力網(wǎng)絡(luò)新建500k V變電站及并網(wǎng)后靜態(tài)安全問(wèn)題進(jìn)行分析。根據(jù)工程實(shí)際情況進(jìn)行了負(fù)荷預(yù)測(cè)、電力平衡分析,選取兩種基本潮流運(yùn)行方式,分別研究了正常運(yùn)行方式、檢修方式和特殊運(yùn)行方式下的潮流、過(guò)載及地區(qū)電壓分析,針對(duì)靜態(tài)安全分析中出現(xiàn)的問(wèn)題,給出了具體控制措施。4.針對(duì)靜態(tài)安全分析中出現(xiàn)電壓越限中的電壓偏低問(wèn)題,對(duì)低壓優(yōu)化控制措施的基本原理進(jìn)行了推導(dǎo),提出了一種基于解析靈敏度的低壓優(yōu)化控制措施。利用IEEE-39經(jīng)典算例以及某地區(qū)實(shí)際電網(wǎng)實(shí)例,對(duì)低壓優(yōu)化控制措施的順序進(jìn)行了仿真分析,結(jié)果表明,首先在網(wǎng)絡(luò)中無(wú)功補(bǔ)償靈敏度大的負(fù)荷節(jié)點(diǎn)進(jìn)行必要的無(wú)功功率補(bǔ)償,如果無(wú)功功率補(bǔ)償后,該低壓點(diǎn)電壓未能恢復(fù)至正常水平,則再逐漸切除該負(fù)荷點(diǎn)一定量的負(fù)荷。在實(shí)際應(yīng)用中,這樣的低壓優(yōu)化措施,電壓改善效果更顯著,避免了對(duì)全局信息的依賴(lài),計(jì)算簡(jiǎn)單,處理速度快,適合在線(xiàn)應(yīng)用,具有應(yīng)用價(jià)值。
[Abstract]:Power energy is the foundation of a country's industrial development, the lifeblood of national economic development, and the basic guarantee of national economy and people's livelihood. Power security is directly related to the healthy development of the national economy and the long-term stability of the society. In recent years, The power system of our country is developing towards large generating units, large power grids, large capacity and long distance transmission, gradually building and perfecting the backbone network of UHV power grids, and coordinating the construction of strong grid structures of various voltage levels. The new generation, transmission and transformation projects are in full swing. Electric power accidents also often occur. This paper aims at the problems that may affect the stable operation of power network in the process of power network expansion and interconnection. The main work of this paper is as follows: 1. The structure and mathematical model of each component of power network are studied, and the mathematical model of power flow calculation is summarized. The basic principle and calculation steps of Newton-Raphson power flow calculation method. 2. The basic principle and method of power grid static safety analysis are studied, and the work flow and concrete implementation method of power grid static safety analysis are summarized. Mainly include: load forecasting, power balance, power flow operation mode selection, static safety analysis, etc. 3. Select a project example, This paper analyzes the static safety problems of the new 500kV substation and connected to the grid. According to the actual situation of the project, load forecasting, power balance analysis, two basic power flow operation modes are selected, and the normal operation mode is studied respectively. The power flow, overload and area voltage analysis under maintenance mode and special operation mode. Aiming at the problems in static safety analysis, the specific control measures are given. 4. Aiming at the problem of low voltage in voltage overrun in static safety analysis, In this paper, the basic principle of low voltage optimal control is deduced, and a low voltage optimal control method based on analytical sensitivity is put forward. An example of IEEE-39 is used as well as an example of an actual power network in a certain area. The sequence of low voltage optimal control measures is simulated and analyzed. The results show that the reactive power compensation is necessary at the load node with high reactive power compensation sensitivity in the network, and if the reactive power compensation is followed by reactive power compensation, If the voltage of the low-voltage point fails to return to its normal level, then the load of the load point is gradually removed. In practical application, the voltage improvement effect of such low-voltage optimization measures is more remarkable, and the dependence on global information is avoided, and the calculation is simple. The processing speed is fast, suitable for the online application, has the application value.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TM732

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