本文選題：海洋平臺電網(wǎng) + 多區(qū)域互聯(lián)電網(wǎng)　； 參考：《西南石油大學(xué)》2017年碩士論文

【摘要】：隨著社會經(jīng)濟(jì)的不斷發(fā)展,人們生活水平的不斷提高,對電力和能源的需求與要求也越來越高,隨之而來的資源短缺、環(huán)境污染等問題也日益嚴(yán)重。為了緩解和解決這些問題,"新能源革命"、"海洋工程"等項目應(yīng)運而生。海洋平臺電網(wǎng)作為"海洋工程"海上作業(yè)平臺生產(chǎn)生活的電力支撐,其電能質(zhì)量和電壓穩(wěn)定性關(guān)系著海上作業(yè)平臺生產(chǎn)生活的正常運行。因此,有必要對海洋平臺電網(wǎng)的電壓穩(wěn)定性進(jìn)行分析研究�？紤]海洋平臺群電網(wǎng)與多區(qū)域互聯(lián)電網(wǎng)的共同特性以及海洋這一特殊環(huán)境對海洋平臺電網(wǎng)的影響,本文在多區(qū)域互聯(lián)電網(wǎng)的基礎(chǔ)上提出了基于考慮邊界關(guān)聯(lián)影響的改進(jìn)REI等值法的電壓穩(wěn)定L指標(biāo)協(xié)同計算方法。主要研究內(nèi)容大致如下:(1)根據(jù)"分解-協(xié)調(diào)"的計算思想,以互聯(lián)電網(wǎng)功率平衡方程為基礎(chǔ),明確區(qū)域電網(wǎng)間對彼此的邊界關(guān)聯(lián)影響,推導(dǎo)出考慮區(qū)域電網(wǎng)邊界關(guān)聯(lián)影響的基于區(qū)域電網(wǎng)局部數(shù)據(jù)的改進(jìn)REI等值模型,使其能在一定程度上反映互聯(lián)電網(wǎng)的動態(tài)特性。(2)采用變距線性回歸分析的方法,根據(jù)區(qū)域電網(wǎng)的本地數(shù)據(jù)篩選有效的樣本點集合,經(jīng)過平移變換和時間加權(quán)回歸,求取單邊界節(jié)點情況下的改進(jìn)REI等值方法的等值參數(shù)。根據(jù)邊界節(jié)點間的電壓無功靈敏度經(jīng)驗值,求取多邊界節(jié)點情況下的改進(jìn)REI等值方法的等值參數(shù)。(3)將求得的改進(jìn)REI等值參數(shù),代入到區(qū)域電網(wǎng)的基本節(jié)點信息中,得出新的節(jié)點導(dǎo)納矩陣,推導(dǎo)L指標(biāo)計算過程中使用到的負(fù)荷參與因子F矩陣的前后變化。將變化后的F矩陣帶回L指標(biāo)計算公式,得到對互聯(lián)電網(wǎng)電壓穩(wěn)定評估的L指標(biāo)協(xié)同計算方法。(4)選取標(biāo)準(zhǔn)IEEE14節(jié)點系統(tǒng)、IEEE118節(jié)點系統(tǒng)和某實際電網(wǎng)模型,編寫潮流算例,仿真驗證上述方法的正確性,并將該方法應(yīng)用于渤海某地區(qū)實際海洋平臺電網(wǎng),初步評估該實際海洋平臺電網(wǎng)的靜態(tài)電壓穩(wěn)定性。(5)針對海洋平臺電網(wǎng)的自身特殊性,考慮海底電纜電容效應(yīng)對海洋平臺電網(wǎng)的影響,通過對海底電纜部分參數(shù)的重新取值,修正對海洋平臺電網(wǎng)的電壓穩(wěn)定性評估。通過對幾個多區(qū)域互聯(lián)電網(wǎng)和渤海某地區(qū)實際海洋平臺電網(wǎng)的電壓穩(wěn)定性分析,仿真驗證了本文提出的考慮邊界關(guān)聯(lián)影響的改進(jìn)REI等值法的電壓穩(wěn)定L指標(biāo)協(xié)同計算方法的正確有效性,且該方法只需要區(qū)域電網(wǎng)本地運行參數(shù),降低了互聯(lián)電網(wǎng)間的通信和計算負(fù)擔(dān)。
[Abstract]:With the development of social economy and the improvement of people's living standard, the demand and demand for power and energy are more and more high, and the following problems such as shortage of resources and environmental pollution are becoming more and more serious. In order to alleviate and solve these problems, new energy revolution, ocean engineering and other projects came into being. As the power support of offshore platform production and life, the power quality and voltage stability of offshore platform are related to the normal operation of offshore platform. Therefore, it is necessary to analyze and study the voltage stability of offshore platform grid. Considering the common characteristics of offshore platform groups and multi-area interconnected networks and the impact of the special environment of the ocean on offshore platform grids, In this paper, an improved REI equivalent method based on the improved REI equivalent method is proposed to calculate the voltage stability L index on the basis of the multi-area interconnected power network. The main research contents are as follows: (1) according to the idea of "decomposition-coordination", based on the power balance equation of interconnected power grid, the influence of regional power grid on each other's boundary is clarified. An improved REI equivalent model based on local data of regional power network considering the influence of regional power network boundary correlation is derived, which can reflect the dynamic characteristics of interconnected power network to a certain extent. The method of variable distance linear regression analysis is adopted. According to the local data of the regional power network, the effective set of sample points is screened, and the equivalent parameters of the improved REI equivalence method under the condition of single boundary node are obtained by translation transformation and time-weighted regression. According to the experience value of voltage and reactive power sensitivity between boundary nodes, the equivalent parameters of the improved REI equivalence method in the case of multi-boundary nodes are calculated. The improved REI equivalent parameters are replaced into the basic node information of the regional power network. A new node admittance matrix is obtained and the change of the load participation factor F matrix used in the calculation of L index is deduced. The variable F matrix is brought back to the L index calculation formula, and the L index cooperative calculation method for voltage stability evaluation of interconnected power network is obtained. (4) the standard IEEE 14 bus system and a real power network model are selected, and a power flow calculation example is compiled. The simulation results verify the correctness of the above method, and apply the method to a practical offshore platform grid in Bohai Sea. The static voltage stability of the actual offshore platform grid is evaluated preliminarily. Considering the effect of submarine cable capacitance effect on offshore platform power network, the voltage stability evaluation of offshore platform network is modified by re-selecting some parameters of submarine cable. Based on the voltage stability analysis of several multi-area interconnected power networks and the actual offshore power grid in Bohai Sea, The simulation results show that the improved REI equivalent method proposed in this paper is correct and effective in calculating voltage stability L index, and the method only needs the local operation parameters of the regional power network. The communication and computing burden between the interconnected power grids is reduced.
【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：P75;TM712

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