【摘要】：電力系統(tǒng)全過程動態(tài)仿真是實現(xiàn)電力系統(tǒng)機(jī)電暫態(tài)和中長期過程有機(jī)統(tǒng)一的一種數(shù)字仿真,是大規(guī)模電力系統(tǒng)動態(tài)特性機(jī)理揭示、嚴(yán)重事故特征分析及其穩(wěn)定措施研究的重要方法。本文圍繞電力系統(tǒng)全過程動態(tài)仿真的數(shù)值計算方法和中長期動態(tài)建模等問題開展研究,主要研究工作包括： (1)提出了一種適于電力系統(tǒng)剛性微分代數(shù)方程組的組合數(shù)值積分算法。該算法使變步長的Gear積分和固定步長的梯形積分兩種方法在仿真中有機(jī)結(jié)合,滿足從幾秒到幾十分鐘以上時間尺度的全過程動態(tài)仿真的需求,避免了類似算法由于收斂性而導(dǎo)致的計算效率偏低和含間斷環(huán)節(jié)的控制系統(tǒng)的計算復(fù)雜問題。 (2)提出了一種利用稀疏矩陣特點的分塊快速直接仿真求解算法,以及基于矩陣工作量消去樹的并行求解算法,開發(fā)實現(xiàn)了大型線性方程組求解器。該算法利用部分小分塊矩陣具有相同結(jié)構(gòu)的特點進(jìn)行矩陣LU符號分解、數(shù)值分解、前代和回代求解計算,在矩陣的LU分解方面具有較為明顯的求解速度優(yōu)勢。 (3)提出了一種適于電力系統(tǒng)全過程動態(tài)仿真的機(jī)爐協(xié)調(diào)控制模型,建立了含有汽包鍋爐的火電機(jī)組動力系統(tǒng)模型。通過模型參數(shù)值的恰當(dāng)選取,模型可用于模擬以爐跟機(jī)為基礎(chǔ)的協(xié)調(diào)控制等火電廠機(jī)組常用的組態(tài)方式。結(jié)合國內(nèi)實際情況,分析指出了火電機(jī)組動力系統(tǒng)仿真模型的應(yīng)用方法。 (4)提出了基于混雜系統(tǒng)建模方法的自動發(fā)電控制模型。模型由區(qū)域控制偏差計算、控制策略和機(jī)組調(diào)節(jié)指令計算3個模塊組成,能夠模擬我國實際電網(wǎng)中的A標(biāo)準(zhǔn)和CPS標(biāo)準(zhǔn)控制策略、聯(lián)絡(luò)線功率頻率偏差控制方式等,可為解決大規(guī)模電網(wǎng)聯(lián)絡(luò)線功率波動限制和多區(qū)域自動發(fā)電控制策略的協(xié)調(diào)配合等實際電網(wǎng)問題提供仿真分析手段。 (5)開發(fā)實現(xiàn)了大規(guī)模電力系統(tǒng)的全過程動態(tài)仿真程序。采用面向?qū)ο蠓椒▽崿F(xiàn)了程序的架構(gòu)設(shè)計和開發(fā)。通過兩個基于我國大規(guī)模電網(wǎng)的算例仿真,驗證了提出的全過程動態(tài)仿真算法、模型以及仿真軟件的有效性。
[Abstract]:The whole process dynamic simulation of power system is a kind of digital simulation to realize the organic unification of electromechanical transient and medium and long term process of power system, and it is also the revelation of the dynamic characteristic mechanism of large-scale power system. Analysis of the characteristics of serious accidents and important methods for the study of stabilization measures. This paper focuses on the numerical calculation method of the whole process dynamic simulation of power system and the long-term dynamic modeling. The main works are as follows: (1) A combined numerical integration algorithm is proposed for power system rigid differential algebraic equations. This algorithm combines Gear integral with variable step size and trapezoidal integral with fixed step size in simulation, and meets the requirement of dynamic simulation of whole process in time scale from several seconds to more than tens of minutes. It avoids the problems of low computational efficiency caused by convergence of similar algorithms and computational complexity of control systems with discontinuous links. (2) A fast block direct simulation algorithm based on sparse matrix and a parallel algorithm based on matrix workload elimination tree are proposed. A large linear equation system solver is developed. In this algorithm, the LU symbolic decomposition, numerical decomposition, pre-generation and back-generation solution are carried out by using the characteristics that some small partitioned matrices have the same structure. The algorithm has obvious advantages in solving the LU decomposition of the matrix. (3) A coordinated control model of boiler for power system dynamic simulation is proposed, and the power system model of thermal power unit with drum boiler is established. Through the proper selection of model parameters, the model can be used to simulate the common configuration methods of thermal power plant units such as coordinated control based on boiler follower. Combined with the actual situation in China, the application method of power system simulation model of thermal power unit is analyzed and pointed out. (4) an automatic generation control model based on hybrid system modeling method is proposed. The model is composed of three modules: regional control deviation calculation, control strategy and unit regulation instruction calculation, which can simulate the control strategy of A standard and CPS standard, tie-line power frequency deviation control method and so on. It can be used to solve the problems of large-scale power fluctuation of tie-line and coordination of multi-area automatic generation control strategy. (5) the whole process dynamic simulation program of large scale power system is developed. The object-oriented method is used to design and develop the architecture of the program. The effectiveness of the proposed algorithm, model and simulation software is verified by two simulation examples based on large-scale power grid in China.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2014
【分類號】：TM743

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