本文選題：配電網(wǎng)　切入點：最大供電能力　出處：《東北電力大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：國家能源局印發(fā)的《配電網(wǎng)建設(shè)改造行動計劃(2015—2020年)》提出,將優(yōu)化完善結(jié)構(gòu)、消除薄弱環(huán)節(jié)作為重點任務(wù),開展配電網(wǎng)網(wǎng)架優(yōu)化行動,加強中壓配電網(wǎng)站間聯(lián)絡(luò),構(gòu)建堅強的負荷轉(zhuǎn)移通道,提升供電靈活性及可靠性,提升城鎮(zhèn)地區(qū)供電能力及供電安全水平。同時,由于配電網(wǎng)通常采用“閉環(huán)設(shè)計,開環(huán)運行”,而聯(lián)絡(luò)線作為閉環(huán)中的重要一環(huán),起著提高供電可靠性、加強供電能力和提高設(shè)備利用率的關(guān)鍵作用,是供電恢復(fù)和負荷轉(zhuǎn)帶的重要通道,故聯(lián)絡(luò)結(jié)構(gòu)規(guī)劃結(jié)果的優(yōu)劣直接影響了整個配電網(wǎng)的運行安全性及經(jīng)濟性。本文建立一種基于帕累托最優(yōu)的主變聯(lián)絡(luò)結(jié)構(gòu)規(guī)劃模型。首先,在考慮N-1安全準(zhǔn)則及實際運行條件的基礎(chǔ)上,分析主變短時允許過載系數(shù)及負荷二次轉(zhuǎn)供過程對配電網(wǎng)最大供電能力(Total Supply Capability,TSC)的影響,建立基于饋線互聯(lián)關(guān)系的TSC計算模型,采用線性規(guī)劃法實現(xiàn)對模型的求解,同時,利用饋線負載均衡模型得到配電網(wǎng)達到TSC時負荷的最優(yōu)分布情況。其次,為兼顧聯(lián)絡(luò)結(jié)構(gòu)規(guī)劃的有效性和經(jīng)濟性,建立計及配電網(wǎng)TSC和最小聯(lián)絡(luò)費用的聯(lián)絡(luò)結(jié)構(gòu)多目標(biāo)規(guī)劃模型,在計算聯(lián)絡(luò)費用時,考慮地理因素的影響,采用帶有精英策略的非支配排序遺傳算法(Non-dominated Sorting Genetic Algorithm-Ⅱ,NSGA-Ⅱ)對模型進行求解,將所得帕累托前沿中的個體作為備選方案,利用變異系數(shù)法和TOPSIS法對其進行排序,選取最佳聯(lián)絡(luò)結(jié)構(gòu)規(guī)劃方案。所得規(guī)劃結(jié)果不僅包含各主變間聯(lián)絡(luò)通道建設(shè)結(jié)果,同時明確地表明通道內(nèi)聯(lián)絡(luò)支路的數(shù)量及位置。最終,工程實例分析結(jié)果表明該方法是正確、有效的。
[Abstract]:The Plan of Action for the Construction and Transformation of Distribution Networks (2015-2020), issued and issued by the State Energy Administration, proposes that optimizing and perfecting the structure, eliminating weak links as a key task, carrying out the optimization of the distribution network structure, and strengthening the liaison between the medium-voltage distribution websites, Build a strong load transfer channel, improve the flexibility and reliability of power supply, improve the power supply capacity and safety level in urban areas. At the same time, because the distribution network is usually "closed-loop design," As an important link in the closed loop, the tie line plays a key role in improving the reliability of power supply, strengthening the power supply capacity and improving the utilization rate of the equipment. It is an important channel for power supply recovery and load transfer. Therefore, the result of the connection structure planning has a direct impact on the safety and economy of the whole distribution network. In this paper, a Pareto optimal model of the main transformer connection structure planning is established. On the basis of considering the N-1 security criterion and practical operation conditions, this paper analyzes the influence of the short-time allowable overload coefficient and the secondary load transfer process of the main transformer on the maximum power supply capacity of the distribution network Total Supply capability TSC, and establishes a TSC calculation model based on the feeder interconnection relationship. The linear programming method is used to solve the model. At the same time, the optimal distribution of load when the distribution network reaches TSC is obtained by using the feeder load balancing model. Secondly, in order to give consideration to the efficiency and economy of the connection structure planning, A multi-objective programming model with TSC and minimum contact cost for distribution network is established. The influence of geographical factors is taken into account in the calculation of liaison cost. Non-dominated Sorting Genetic algorithm (NSGA- 鈪，

本文編號：1560867