本文選題：分布式小水電 + 微網(wǎng)��； 參考：《華南理工大學》2014年碩士論文

【摘要】：韶關(guān)地區(qū)水電資源豐富、水電總裝機容量大，但是大部分為無調(diào)節(jié)能力的徑流電廠，部分蓄水式電廠的水庫調(diào)節(jié)能力也只能達到季調(diào)節(jié)能力，這些小水電大多直接接入供電網(wǎng)絡(luò)，專線上網(wǎng)占比很小。此種小水電及其接入電網(wǎng)有較大的局限性。本文研究韶關(guān)地區(qū)以小水電為主要電源的微網(wǎng)的結(jié)構(gòu)域、負荷頻率響應(yīng)、運行和控制問題，以及小水電線路要發(fā)展為微網(wǎng)涉及的技術(shù)改造問題。 本文的主要內(nèi)容包括：一、介紹了分布式小水電的特點及其接入電網(wǎng)的結(jié)構(gòu)、和對接入電網(wǎng)的在電壓波動、功率因數(shù)、主要影響、供電可靠性、繼電保護和自動裝置設(shè)置問題等方面的影響；二、通過介紹小水電接入電網(wǎng)三種等效結(jié)構(gòu)給出了完整的微網(wǎng)結(jié)構(gòu)，以及介紹了微網(wǎng)中起到網(wǎng)絡(luò)監(jiān)控和保護的負荷管理與控制系統(tǒng)、發(fā)電管理與控制系統(tǒng)、緊急情況應(yīng)急系統(tǒng)等裝置；三、采用MATLAB軟件對微網(wǎng)的負荷頻率特性進行仿真研究，通過研究表明，單純用小水電來調(diào)頻時，頻率波動頻繁且不穩(wěn)定，接入其他形式電源和儲能裝置，頻率的波動明顯減小，頻率偏差也能控制可接受范圍；四、最后著重介紹了微網(wǎng)的運行問題和控制問題，主要是孤島運行狀態(tài)和并網(wǎng)運行狀態(tài)的特點和運行要求、微網(wǎng)控制的方法，以及在孤島運行狀態(tài)與并網(wǎng)運行狀態(tài)之間切換時的頻率和電壓值的仿真分析。 本文在最后總結(jié)得出了小水電線路的技術(shù)改造方法，，主要有上網(wǎng)線路和負荷線路分離、加裝無功補償調(diào)壓裝置、保護裝置的改造三個方面，還總結(jié)了要將小水電線路發(fā)展成為微網(wǎng)要考慮的幾個問題，主要包括發(fā)展多種形式電源、增加儲能裝置、并網(wǎng)運行要求、監(jiān)控措施改造等方面。這些結(jié)論將對富含小水電地區(qū)的配電網(wǎng)規(guī)劃和建設(shè)工作起到一定的指導意義。
[Abstract]:Shaoguan area is rich in hydropower resources and has a large total installed capacity of hydropower, but most of them are runoff power plants with no regulating capacity, and the reservoir regulation capacity of some water storage power plants can only reach seasonal regulation capacity. Most of these small hydropower directly connected to the power supply network, the proportion of dedicated lines to the Internet is very small. This kind of small hydropower and its access to the power grid has greater limitations. In this paper, the structural domain, load frequency response, operation and control of the micro-grid with small hydropower as the main power source in Shaoguan area are studied, and the technical transformation problems involved in the development of the small hydropower line to the micro-grid are also studied in this paper. The main contents of this paper are as follows: first, the characteristics of distributed small hydropower and the structure of connecting to the power grid, and the voltage fluctuation, power factor, main influence, power supply reliability of the access network are introduced. The effects of relay protection and automatic device setup are discussed. Secondly, the complete microgrid structure is given by introducing three equivalent structures of small hydropower connected to the power network. The load management and control system, power generation management and control system, emergency system and so on are introduced. Thirdly, the load frequency characteristics of microgrid are simulated by using MATLAB software. The study shows that frequency fluctuation is frequent and unstable when only small hydropower is used for frequency modulation. When other forms of power supply and energy storage device are connected, the frequency fluctuation is obviously reduced, and the frequency deviation can also control the acceptable range. Finally, the operation and control problems of microgrid are introduced, including the characteristics and requirements of island operation and grid-connected operation, and the method of microgrid control. The simulation analysis of frequency and voltage between island operation state and grid-connected operation state is given. In the last part of this paper, the technical transformation methods of small hydropower lines are summarized, including separation of power lines from load lines, installation of reactive power compensation and voltage regulation devices, and reconstruction of protective devices. Several problems to be considered in the development of small hydropower lines into microgrids are also summarized, including the development of various forms of power supply, the addition of energy storage devices, the operation requirements of grid connection, the improvement of monitoring measures, and so on. These conclusions will play a certain guiding role in the distribution network planning and construction in the area rich in small hydropower.
【學位授予單位】：華南理工大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM715;TV742

【參考文獻】

相關(guān)期刊論文 前1條

1 黃震;陳平;;配電線路自適應(yīng)電流速斷保護的實用化研究[J];四川電力技術(shù);2008年S2期

本文編號：1932395