【摘要】：隨著新能源技術(shù)的發(fā)展、電能質(zhì)量要求的不斷提高以及用電負(fù)荷的直流化發(fā)展,傳統(tǒng)的交流配電方式已經(jīng)不能滿(mǎn)足新時(shí)期的發(fā)展需要。相比于傳統(tǒng)交流配電網(wǎng),基于柔性直流技術(shù)的配電網(wǎng)在供電容量、電能質(zhì)量、系統(tǒng)可控性、線(xiàn)路成本以及兼容分布式電源性能等方面具有更加優(yōu)越的性能,成為未來(lái)配電網(wǎng)新的發(fā)展方向。隨著直流配電網(wǎng)項(xiàng)目的深入研究,對(duì)于直流配電網(wǎng)模型的規(guī)模、可控性以及仿真效率也提出了更高的要求,傳統(tǒng)的以電力電子為基礎(chǔ)的建模方法已不能完全適用于直流配電網(wǎng)中大規(guī)模的仿真研究。本文以直流配電網(wǎng)高效模型的構(gòu)建及其仿真應(yīng)用作為主要的研究?jī)?nèi)容。分析了直流配電網(wǎng)內(nèi)部的直流潮流特性,確立了直流配電網(wǎng)模型的目標(biāo)控制參數(shù)�；谥绷髋潆娋W(wǎng)拓?fù)浼軜?gòu),提出了一種基于直流配電網(wǎng)各變換器“自主”運(yùn)行和P-U下垂特性相結(jié)合的直流配電網(wǎng)協(xié)同控制策略;提出了一種新型的直流配電網(wǎng)元器件建模方法,并對(duì)所構(gòu)建的電源、負(fù)荷以及直流變壓器模型進(jìn)行仿真分析。該建模方法避免了對(duì)直流配電網(wǎng)中電力電子元件的精細(xì)建模,最大程度上模擬直流配電網(wǎng)元器件的電氣特性,極大減少了計(jì)算機(jī)仿真系統(tǒng)的計(jì)算量,提升了仿真效率,有利于大規(guī)模直流配網(wǎng)的仿真分析工作。完成八端直流配電網(wǎng)的組網(wǎng)模型的組建,并對(duì)其進(jìn)行仿真應(yīng)用。首先將三種理論配電網(wǎng)拓?fù)浣Y(jié)構(gòu)應(yīng)用于八端直流配電網(wǎng)的組網(wǎng)模型之中,包括正常穩(wěn)態(tài)運(yùn)行狀態(tài)以及N-1故障情況下的仿真。仿真結(jié)果表明穩(wěn)態(tài)運(yùn)行時(shí)模型中的潮流分布明確,故障時(shí)暫態(tài)過(guò)程真實(shí)顯著,驗(yàn)證了所構(gòu)建的直流配電網(wǎng)模型能適用于直流配電“網(wǎng)級(jí)”研究;其次,對(duì)所構(gòu)建的直流配電網(wǎng)模型進(jìn)行了深化仿真應(yīng)用,針對(duì)直流配電網(wǎng)能量?jī)?yōu)化問(wèn)題進(jìn)行了探討,建立直流配電網(wǎng)負(fù)荷曲線(xiàn)量化指標(biāo),以傳統(tǒng)能源承擔(dān)負(fù)荷波動(dòng)程度最小為目標(biāo),構(gòu)建直流配電網(wǎng)優(yōu)化模型,對(duì)配網(wǎng)中儲(chǔ)能模塊進(jìn)行運(yùn)行優(yōu)化。優(yōu)化結(jié)果顯示常規(guī)能源所承擔(dān)的負(fù)荷波動(dòng)量降低,常規(guī)能源負(fù)荷率有所提高,驗(yàn)證了優(yōu)化方法的有效性,同時(shí)也進(jìn)一步證明了本文所構(gòu)建的直流配電網(wǎng)模型的仿真應(yīng)用價(jià)值。
[Abstract]:With the development of new energy technology, the continuous improvement of power quality requirements and the direct development of power load, the traditional AC distribution mode can no longer meet the development needs of the new period. Compared with the traditional AC distribution network, the distribution network based on flexible DC technology has better performance in power supply capacity, power quality, system controllability, line cost and compatible distributed power supply performance. It has become a new development direction of distribution network in the future. With the in-depth study of DC distribution network project, the scale, controllability and simulation efficiency of DC distribution network model are also put forward higher requirements. The traditional modeling method based on power electronics can not be fully applied to large-scale simulation research in DC distribution network. In this paper, the construction of DC distribution network efficient model and its simulation application are taken as the main research content. The DC power flow characteristics in DC distribution network are analyzed, and the target control parameters of DC distribution network model are established. Based on the topology of DC distribution network, a cooperative control strategy of DC distribution network based on the combination of "autonomous" operation of DC distribution network converters and P 鈮，

本文編號(hào)：2479784