發(fā)布時(shí)間：2018-06-24 15:36

  本文選題：電力系統(tǒng) + 柔性交流輸電系統(tǒng)�。� 參考：《山東大學(xué)》2014年博士論文

【摘要】：柔性交流輸電裝置(Flexible AC Transmission System, FACTS)在提升電網(wǎng)安全穩(wěn)定水平和運(yùn)行效率方面發(fā)揮了重要的作用。隨著柔性交流輸電裝置在電力系統(tǒng)中的廣泛應(yīng)用,多個(gè)FACTS控制器之間的交互作用和協(xié)調(diào)問(wèn)題成為與實(shí)際電網(wǎng)安全穩(wěn)定運(yùn)行密切相關(guān)的關(guān)鍵技術(shù)問(wèn)題和研究熱點(diǎn)。研究多個(gè)FACTS裝置間交互作用的原因和機(jī)理,以及協(xié)調(diào)控制問(wèn)題,提出系統(tǒng)的、可行的協(xié)調(diào)控制策略,對(duì)于提高電力系統(tǒng)的穩(wěn)定運(yùn)行水平,具有重要的理論價(jià)值和實(shí)際意義。 論文以電力系統(tǒng)動(dòng)態(tài)穩(wěn)定問(wèn)題為工程背景,在電力系統(tǒng)多FACTS交互作用分析及協(xié)調(diào)阻尼控制方面,進(jìn)行了深入的研究和有益的探討,提出利用多變量頻域控制理論、協(xié)同專(zhuān)家控制理論和廣域協(xié)調(diào)控制理論相結(jié)合的思想解決復(fù)雜電力系統(tǒng)中的多FACTS交互作用分析與協(xié)調(diào)阻尼控制問(wèn)題,并借助于數(shù)�；旌戏抡鎸�(shí)驗(yàn)室驗(yàn)證了論文所提理論和方法的有效性。主要研究工作和創(chuàng)新性成果如下： 1)針對(duì)當(dāng)前多FACTS協(xié)調(diào)控制與交互作用領(lǐng)域存在的多FACTS交互作用機(jī)理研究缺乏的問(wèn)題,本文提出了采用選擇模式分析(Selective Modal Analysis,SMA)和多變量頻域控制理論進(jìn)行多FACTS交互作用機(jī)理研究的方法。具體為首先通過(guò)SMA法對(duì)大規(guī)模電力系統(tǒng)的線(xiàn)性化微分-代數(shù)方程降階,得到僅包含與FACTS控制器強(qiáng)相關(guān)狀態(tài)變量的縮略狀態(tài)空間模型,而后在此縮略狀態(tài)空間模型的基礎(chǔ)上,利用多變量頻域控制理論推導(dǎo)出了多FACTS間交互作用的關(guān)系和發(fā)生條件,并在此基礎(chǔ)上揭示了多FACTS間交互作用的機(jī)理。研究結(jié)果表明：處于多機(jī)系統(tǒng)同一電力區(qū)域中的多臺(tái)FACTS阻尼控制器間存在相互制約的關(guān)系,當(dāng)控制器參數(shù)滿(mǎn)足負(fù)交互條件時(shí)會(huì)發(fā)生比較明顯的負(fù)交互作用,嚴(yán)重時(shí)甚至威脅系統(tǒng)的安全運(yùn)行,當(dāng)控制器參數(shù)滿(mǎn)足協(xié)調(diào)運(yùn)行條件時(shí)才能保證多FACTS間的協(xié)調(diào)運(yùn)行與控制。通過(guò)典型四機(jī)兩區(qū)域系統(tǒng)和某實(shí)際電網(wǎng)的時(shí)域仿真結(jié)果對(duì)比,驗(yàn)證了所提出的多FACTS負(fù)交互作用判據(jù)在判定多FACTS間是否存在負(fù)交互作用的正確性。 2)針對(duì)現(xiàn)有研究中多FACTS阻尼控制交互作用量化分析方法缺乏的問(wèn)題,提出了基于多變量系統(tǒng)等效開(kāi)環(huán)過(guò)程(Effective Open-loop Process, EOP)理論和多變量Nyquist推廣定理的多FCATS阻尼控制器交互作用量化分析方法。推導(dǎo)了電力系統(tǒng)阻尼控制框架下的EOP,在此基礎(chǔ)上建立了用于多FACTS阻尼控制器分析的阻尼控制等效開(kāi)環(huán)過(guò)程(Damping Control Effective Open-loop Process, DCEOP).提出了基于DCEOP譜半徑和多變量Nyquist推廣定理的多FACTS阻尼控制器交互作用分析方法,可以判斷系統(tǒng)中是否存在多FACTS阻尼控制器的負(fù)交互作用。進(jìn)一步推導(dǎo)并提出了基于DCEOP的多FACTS交互風(fēng)險(xiǎn)因子和交互作用因子,實(shí)現(xiàn)了多FACTS阻尼控制器協(xié)調(diào)控制及交互作用的量化分析。算例仿真結(jié)果驗(yàn)證了本文方法的正確性以及在實(shí)際電網(wǎng)中應(yīng)用的可行性。 3)針對(duì)實(shí)際大規(guī)模電力系統(tǒng)多FACTS阻尼控制器參數(shù)難以協(xié)調(diào)的問(wèn)題,提出了利用網(wǎng)格自適應(yīng)直接搜索(Mesh Adaptive Direct Search,MADS)算法整定多FACTS阻尼控制器的方法,該方法使用頻域設(shè)計(jì)思想保證了控制器多運(yùn)行方式下的魯棒性,同時(shí)使用MADS算法保證多控制器的協(xié)調(diào)運(yùn)行能力,最終實(shí)現(xiàn)多臺(tái)FACTS阻尼控制器的協(xié)調(diào)運(yùn)行與控制。實(shí)際電網(wǎng)中的仿真結(jié)果驗(yàn)證了采用MADS方法所整定的多FACTS阻尼控制器參數(shù)在提高電力系統(tǒng)阻尼與消除多FACTS負(fù)交互作用方面的有效性。 4)針對(duì)現(xiàn)有多FACTS參數(shù)協(xié)調(diào)控制方法采用離線(xiàn)仿真校核,只能實(shí)現(xiàn)有限數(shù)量工況下的協(xié)調(diào)控制,所整定的控制器參數(shù)無(wú)法適應(yīng)運(yùn)行工況多變的實(shí)際電力系統(tǒng)的缺陷,論文將專(zhuān)家控制理論與廣域控制理論相融合,提出了一種基于廣域協(xié)同專(zhuān)家控制理論的多FACTS協(xié)調(diào)阻尼實(shí)時(shí)控制新方法�；诙郌ACTS協(xié)調(diào)控制專(zhuān)家的先進(jìn)經(jīng)驗(yàn)實(shí)時(shí)監(jiān)控電網(wǎng)運(yùn)行狀態(tài)和多FACTS交互作用程度,實(shí)現(xiàn)多FACTS協(xié)調(diào)有效特征量的實(shí)時(shí)提��；通過(guò)協(xié)同專(zhuān)家子系統(tǒng)自動(dòng)推理生成區(qū)域?qū)崟r(shí)協(xié)調(diào)控制決策,實(shí)現(xiàn)區(qū)域電網(wǎng)的多FACTS實(shí)時(shí)協(xié)調(diào)控制；通過(guò)協(xié)同專(zhuān)家總系統(tǒng)在線(xiàn)自動(dòng)生成實(shí)時(shí)協(xié)同控制決策,進(jìn)而實(shí)現(xiàn)全網(wǎng)多FACTS控制器的實(shí)時(shí)協(xié)調(diào)控制,從而為復(fù)雜系統(tǒng)下的多FACTS協(xié)調(diào)控制問(wèn)題提供新的解決方案。通過(guò)對(duì)某實(shí)際電網(wǎng)的仿真及數(shù)�；旌蠈�(shí)時(shí)仿真試驗(yàn)驗(yàn)證了所提出的多FACTS實(shí)時(shí)協(xié)調(diào)控制方法的有效性。
[Abstract]:Flexible AC Transmission System (FACTS) plays an important role in improving the safety and stability level and operation efficiency of the power grid. With the wide application of the flexible AC transmission device in the power system, the interaction and coordination of multiple FACTS controllers becomes the safe and stable transport of the power grid with the actual power grid. The key technical issues and research hotspots are closely related. It is of great theoretical and practical significance to study the causes and mechanisms of interaction between multiple FACTS devices, and to coordinate control problems, and to put forward a systematic and feasible coordinated control strategy for improving the stable operation level of power systems.
With the dynamic stability of power system as the engineering background, this paper makes a thorough research and beneficial discussion on the multi FACTS interaction analysis and the coordinated damping control of the power system, and proposes to use the multi variable frequency domain control theory and the combination of the expert control theory and the wide area coordinated control theory to solve the complex power system. The multi FACTS interaction analysis and the coordinated damping control problem are used in the system, and the effectiveness of the proposed theory and method is verified with the aid of a mixed simulation laboratory. The main research work and the innovative results are as follows:
1) in view of the lack of multi FACTS interaction mechanism in the multi FACTS coordination control and interaction field, this paper proposes a method to study the interaction mechanism of multiple FACTS using the selective mode analysis (Selective Modal Analysis, SMA) and multivariable frequency domain control theory. The linearized differential algebraic equation of the power system is reduced, and the abbreviated state space model, which contains only the strong correlation state variables of the FACTS controller, is obtained. On the basis of the abbreviated state space model, the relations and conditions of the interaction between the multiple FACTS systems are derived by using the multivariable frequency domain control theory, and the results are revealed on this basis. The interaction mechanism of multiple FACTS shows that there is a mutual restriction between the multiple FACTS damping controllers in the same power region of the multi machine system. When the controller parameters satisfy the negative interaction conditions, there will be a significant negative interaction, which is serious to the safe operation of the threat system and the controller parameters. The coordinated operation and control of multiple FACTS can be ensured when the coordinated operation conditions are met. By comparing the time domain simulation results of a typical four machine two regional system and a real power grid, the correctness of the proposed multiple FACTS negative interaction criterion is verified to determine whether there is a negative interaction between multiple FACTS.
2) in view of the lack of quantitative analysis method for multi FACTS damping control in existing research, a multi FCATS damping controller based on the equivalent open loop (Effective Open-loop Process, EOP) theory of multivariable system and multivariable Nyquist extension theorem is proposed. The damping control of power system is derived. On the basis of EOP, the damping control equivalent open loop process (Damping Control Effective Open-loop Process, DCEOP) for multiple FACTS damping controllers is established on this basis. A multi FACTS damping controller interaction analysis method based on the DCEOP spectral radius and multivariable Nyquist extension theorem is proposed to determine whether or not the system is in the system. The negative interaction of multiple FACTS damping controllers is present. The multi FACTS interaction risk factor and interaction factor based on DCEOP are further derived and proposed, and the quantitative analysis of the coordinated control and interaction of the multi FACTS damping controller is realized. The simulation results of the calculation example verify the correctness of the method and the application in the actual power grid. Sex.
3) aiming at the problem that the parameters of the multi FACTS damping controller are difficult to coordinate in the actual large-scale power system, a method of adjusting the multiple FACTS damping controller using the Mesh Adaptive Direct Search (MADS) algorithm is proposed. The method uses the frequency domain design idea to guarantee the robustness of the controller in the multi operation mode, and at the same time, The MADS algorithm is used to ensure the coordinated operation of the multiple controllers, and the coordinated operation and control of multiple FACTS damping controllers is achieved. The simulation results in the actual power grid verify the effectiveness of the parameters of the multiple FACTS damping controller set by the MADS method in improving the damping of the power system and eliminating the negative interaction of multi FACTS.
4) in view of the existing multi FACTS parameter coordination control method using off-line simulation checking, it can only realize the coordinated control under the limited number of working conditions, and the parameters of the controller can not adapt to the defects of the actual power system. The thesis combines the theory of expert control with the wide area control theory, and proposes a wide area collaboration. A new method of multi FACTS coordinated damping real time control based on expert control theory. Based on the advanced experience of multi FACTS coordinative control experts, the real-time monitoring of the operation state of the power grid and the interaction degree of multi FACTS is realized, and the real-time extraction of the multi FACTS coordination and effective characteristic quantity is realized, and the regional real-time coordination control decision is generated by the Cooperative Expert subsystem self dynamic reasoning. To realize the multi FACTS real-time coordinated control of the regional power grid, the real-time coordinated control decision is generated automatically by the collaboration of the expert general system, and the real-time coordination and control of the full network multi FACTS controller is realized, thus providing a new solution for the multi FACTS coordination control problem under the complex system. The hybrid real-time simulation experiment verifies the effectiveness of the proposed multi FACTS real-time coordinated control method.
【學(xué)位授予單位】：山東大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TM721.2

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