本文選題：靜態(tài)電壓穩(wěn)定　切入點：電壓穩(wěn)定指標(biāo)　出處：《華北電力大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：風(fēng)力發(fā)電作為技術(shù)上最為成熟的清潔能源發(fā)電方式,近年來得到了迅猛的發(fā)展,并網(wǎng)風(fēng)電規(guī)模越來越大。然而,風(fēng)力發(fā)電在充分利用清潔能源的同時,其出力具有波動性和隨機性,這些特性給電力系統(tǒng)帶來了一定的負(fù)面影響。當(dāng)前風(fēng)電多采用恒定功率因數(shù)控制方式,無功出力不足,對系統(tǒng)的電壓穩(wěn)定影響較大。本文針對風(fēng)電并網(wǎng)對系統(tǒng)的靜態(tài)電壓穩(wěn)定性展開研究,主要工作如下： (1)仿真分析了大規(guī)模風(fēng)電從不同節(jié)點接入系統(tǒng)時對電壓穩(wěn)定的影響。在電力系統(tǒng)綜合仿真程序(PSASP)中搭建了電力系統(tǒng)電壓穩(wěn)定典型仿真系統(tǒng),仿真分析了風(fēng)電滲透率較大的系統(tǒng)中,大規(guī)模風(fēng)電從近發(fā)電機端,中間節(jié)點,近負(fù)荷側(cè)接入系統(tǒng)時,風(fēng)電出力變化對電壓穩(wěn)定指標(biāo)的影響。對比分析研究電壓穩(wěn)定指標(biāo)與風(fēng)電出力的線性程度和區(qū)分度,其中最小奇異值指標(biāo)隨著風(fēng)電出力的變化靈敏度較高且線性程度好。宜采用最小奇異值指標(biāo)分析含大規(guī)模風(fēng)電系統(tǒng)的電壓穩(wěn)定問題。 (2)提出了快速求取電壓穩(wěn)定指標(biāo)的方法。針對大規(guī)模風(fēng)電并網(wǎng)后,風(fēng)電出力波動性導(dǎo)致系統(tǒng)狀態(tài)實時變化,需要對快速評估系統(tǒng)的電壓穩(wěn)定性。在仿真分析和理論分析現(xiàn)有電壓穩(wěn)定指標(biāo)的基礎(chǔ)上,結(jié)合風(fēng)電出力特性和指標(biāo)特點,根據(jù)最小奇異值靈敏度,采用數(shù)值計算的方式快速求取指標(biāo),并且在電壓穩(wěn)定典型仿真系統(tǒng)和某實際風(fēng)電場基地仿真驗證了方法的有效性。 (3)對大規(guī)模風(fēng)電基地集中外送的某地區(qū)電網(wǎng)靜態(tài)安全分析計算,并給出了無功補償策略,提高系統(tǒng)電壓水平。分析計算N-1,N-2以及其他特殊運行方式下的電力系統(tǒng)電壓穩(wěn)定性,根據(jù)結(jié)果設(shè)置無功補償提高系統(tǒng)的靜態(tài)安全,為該地區(qū)的電網(wǎng)規(guī)劃建設(shè)給出了具有一定價值的指導(dǎo)信息。
[Abstract]:Wind power as a clean energy generation for the most mature technology, developing rapidly in recent years, wind power increasingly large scale. However, the wind power generation in the full use of clean energy at the same time, its output has fluctuation and randomness, these characteristics have brought negative influence to the power system. The current wind power using the constant power factor control, reactive power shortage, a greater impact on the voltage stability of the system. This paper studied the static voltage stability of wind power grid connected to the system, the main work is as follows:
(1) the simulation analysis of large scale wind power from different nodes access system on voltage stability in power system. The integrated simulation program (PSASP) is set up in a typical power system voltage stability simulation system, simulation analysis system of wind turbine with high permeability, large scale wind power generator from the near end, near the intermediate nodes. The load side access system, wind power output change of voltage stability index. Comparison study on voltage stability index and the index of wind power output linear degree and area, the minimum singular value index with wind power output change of high sensitivity and good linearity degree. Adopt the minimum singular value problem with voltage stability index analysis large scale wind power system.
(2) put forward the rapid calculation method of voltage stability index for large scale wind power, wind power output fluctuations lead to real-time change of the system, need to voltage stability of the rapid assessment system. In the simulation analysis and theoretical analysis based on the existing voltage stability index, combined with wind power output characteristics and index characteristics. According to the minimum singular value sensitivity, using numerical methods to calculate the index, and verify the effectiveness of the proposed method in a typical simulation system for voltage stability and an actual wind farm base simulation.
(3) analysis of the large-scale wind power base delivery of a regional power grid static security, and gives the reactive power compensation strategy, improve the system voltage level. Calculation and analysis of N-1, voltage stability of power system N-2 and other special operation mode, according to the results of the static security settings to improve the reactive power compensation for the power grid. The planning and construction of the region are guiding information has a certain value.

【學(xué)位授予單位】：華北電力大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM614;TM712

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本文編號：1652473