【摘要】：隨著分布式光伏并網(wǎng)規(guī)模的不斷增大,其出力的波動(dòng)性、隨機(jī)性和間歇性,將對(duì)配電網(wǎng)的長(zhǎng)期電壓穩(wěn)定造成不利的影響。為克服電壓質(zhì)量的惡化,配電網(wǎng)采取主動(dòng)控制改善電壓質(zhì)量。而控制方法和技術(shù)手段又與電網(wǎng)的經(jīng)濟(jì)性和電壓質(zhì)量密切相關(guān)。當(dāng)分布式光伏并網(wǎng)或者配電網(wǎng)規(guī)劃中需要確定在一定的電壓控制方式下,是否能夠保證配電網(wǎng)電壓質(zhì)量和安全約束。因此,急需配電網(wǎng)電壓控制仿真分析決策支持系統(tǒng),為實(shí)際工程提供支撐。在此背景下,本文首先研究了配電網(wǎng)電壓控制基礎(chǔ)理論,而后分析了計(jì)及光伏的配電網(wǎng)電壓控制方法。在此基礎(chǔ)上,總結(jié)提出了光伏不參與調(diào)壓的電壓控制策略和光伏參與調(diào)壓的電壓控制策略。光伏不參與調(diào)壓時(shí),提出了變電站調(diào)壓策略和增設(shè)無功補(bǔ)償調(diào)壓。光伏參與調(diào)壓時(shí),提出了分散式和集中協(xié)調(diào)式兩種調(diào)壓方法。以此為背景結(jié)合配網(wǎng)電壓控制領(lǐng)域最新的理論成果,利用Matlab編寫了分散、集中等幾種控制算法,設(shè)計(jì)并研發(fā)了基于.NET平臺(tái)的含大量光伏配電網(wǎng)的電壓控制仿真系統(tǒng),為大量光伏并網(wǎng)的規(guī)劃方案決策電壓控制系統(tǒng)提供輔助分析,提高了決策的靈活性。該系統(tǒng)在Microsoft Visual Studio 2010集成開發(fā)環(huán)境下,通過嵌入地理信息系統(tǒng)(GIS)組件MapX完成了系統(tǒng)的開發(fā),經(jīng)過軟件測(cè)試性能優(yōu)異。最后以某地區(qū)實(shí)際雙電源10k V系統(tǒng)進(jìn)行了算例驗(yàn)證,該系統(tǒng)已應(yīng)用于某電力公司。
[Abstract]:With the increasing scale of distributed photovoltaic grid-connected, the volatility, randomness and intermittent of its output will have a negative impact on the long-term voltage stability of distribution network. In order to overcome the deterioration of voltage quality, distribution network takes active control to improve voltage quality. The control method and technical means are closely related to the economy and voltage quality of the power grid. When distributed photovoltaic grid-connected or distribution network planning needs to determine whether the voltage quality and security constraints of distribution network can be guaranteed under a certain voltage control mode. Therefore, there is an urgent need for distribution network voltage control simulation analysis decision support system to provide support for practical engineering. Under this background, this paper first studies the basic theory of distribution network voltage control, and then analyzes the distribution network voltage control method considering photovoltaic. On this basis, the voltage control strategy of photovoltaic voltage regulation and the voltage control strategy of photovoltaic voltage regulation are summarized and put forward. When photovoltaic is not involved in voltage regulation, the voltage regulation strategy of substation and the addition of reactive power compensation voltage regulation are put forward. When photovoltaic is involved in voltage regulation, two voltage regulation methods, decentralized and centralized and coordinated, are proposed. Based on this background, combined with the latest theoretical results in the field of distribution network voltage control, several control algorithms, such as dispersion and centralization, are compiled by using Matlab, and a voltage control simulation system with a large number of photovoltaic distribution networks based on. Net platform is designed and developed. It provides auxiliary analysis for a large number of photovoltaic grid-connected planning decision-making voltage control systems, and improves the flexibility of decision-making. The system is developed by embedding (GIS) component MapX in Microsoft Visual Studio 2010 integrated development environment, and the performance of the system is excellent after software testing. Finally, an example is given to verify the 10kV system of dual power supply in a certain area, which has been applied to a power company.
【學(xué)位授予單位】：華北電力大學(xué)(北京)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM714.2;TM743

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