风光储联合发电系统及其控制策略研究

发布时间：2018-05-08 15:27

本文选题：风光储 + 系统　；参考：《河南师范大学》2015年硕士论文

【摘要】：面对全球化石燃料成本增加、储量有限和越来越严重的环境危机问题,可再生能源受到了各国政府和人民的普遍关注。风能和太阳能作为地球上取之无尽、用之不竭的财富,成为可再生能源中人们关注的焦点,并得到了人们的广泛利用。作为当前利用太阳能和风能的主要方式之一,光伏发电和风力发电技术不断成熟。由于风能和太阳能的随机性、间歇性和不稳定性,为了充分提高能量转换效率和能源利用率,基于风力发电和光伏发电的风光储联合发电技术应运而生。在风光储联合发电技术中,控制策略是影响风光储联合发电系统中总体发电效率的一个重要因素。本文基于对风力发电、光伏电池发电和储能系统的概述、工作原理分析,建立风光储联合发电系统框图,给出了单独的风电、光电和储能中的功率控制方案、并网电流控制方法、能量存储系统的控制策略。(1).风光互补发电系统概述对风光互补发电总系统做了介绍,并针对风光储联合发电系统中的风力发电系统和光伏发电系统分别进行了概述。介绍了风力发电的原理,详细介绍了风力发电系统的组成和分类,并选择双馈风力发电系统作为风光储联合发电系统的风力发电单元;针对光伏发电系统,详细介绍了光伏发电原理,简要介绍了光伏电池的分类以及并网发电系统。(2).ESS的削峰平谷及功率控制简要介绍了能量存储系统的四种调控模式:跟踪计划功率模式;平滑功率输出模式;系统调频模式;负载削峰平谷模式。说明了各种调控方式的调控原理及储能系统削峰平谷作用的原理。分析蓄电池的模型及蓄电池充放电控制策略的算法实现,对于能量存储系统,主要介绍了其分类和选择标准,并选择蓄电池作为风光储联合发电系统的储能单元。介绍了能量存储系统在风光储联合发电系统中的削峰平谷作用,针对风光储联合发电系统的系统总体功率控制策略进行了研究,并给出相应的功率控制策略。针对给出的控制策略,详细分析了联合发电系统的有功功率控制和无功功率控制。分别给出了风力发电子系统、光伏发电子系统、储能子系统的功率控制策略并针对相应的控制策略图进行了详细分析,最后给出了蓄电池的充放电控制策略。(3).并网电流控制及逆变带宽控制针对风光储联合发电系统中的并网电流和DC/AC逆变死区带宽的控制进行了研究,针对风光储联合发电系统中的并网电流存在的直流分量和不稳定性进行了研究,将PR控制器用具有谐波补偿和更具实践性的准PR控制器(QPR)代替,并运用到三相并网逆变器的直流控制中;在对传统的PR控制器进行改进,分别加入比例器和相位补偿器进行幅值和相位的修正,设计新的控制器,并用于并网电流稳态误差控制中,理论分析效果良好。接着针对目前并网逆变器死区问题,对传统控制策略进行修正,得到了新的控制策略,将新控制策略应用到逆变器死区带宽控制中,并在双闭环控制系统中对三种控制器进行了仿真分析。
[Abstract]:In the face of the global cost of fossil fuels, Limited reserves and more and more serious environmental crises, renewable energy has been widely concerned by the governments and people of all countries. Wind and solar energy, as the endless and inexhaustible wealth of the earth, have become the focus of the people of renewable energy and have been widely used. As one of the main ways of utilizing solar and wind energy, photovoltaic and wind power generation technology is mature. Due to the randomness, intermittency and instability of wind and solar energy, in order to improve the efficiency of energy conversion and energy utilization, wind power and photovoltaic power generation based on wind and photovoltaic power generation combined power generation technology came into being. The control strategy is an important factor affecting the overall power generation efficiency in the wind and wind power generation system. Based on the summary of wind power generation, photovoltaic cell power generation and energy storage system, this paper analyses the working principle and establishes the frame diagram of the wind and solar energy storage system, and gives the individual wind, photoelectric and energy storage. The power control scheme, the grid connected current control method and the control strategy of the energy storage system. (1). The wind and wind power generation system is introduced. The wind power generation system and the photovoltaic power generation system in the wind and solar power generation system are summarized respectively. The principle of wind power generation is introduced, and the details of the wind power generation system are introduced. This paper introduces the composition and classification of the wind power generation system, and selects the doubly fed wind power generation system as the wind power unit of the wind and solar power generation system. In view of the photovoltaic power generation system, the principle of photovoltaic power generation is introduced in detail. The classification of the photovoltaic cells and the grid connected power generation system are briefly introduced. (2) the peak Pinggu and the power control of the power generation system are briefly introduced. Four control modes of energy storage system are introduced: tracking plan power mode, smooth power output mode, system FM mode, load peaving Pinggu mode. The principle of regulation and regulation of various control modes and the principle of peak peak Pinggu in energy storage system are explained. The algorithm of battery model and battery charging and discharging control strategy is analyzed. Now, for the energy storage system, it mainly introduces its classification and selection standards, and chooses the storage battery as the energy storage unit of the wind and solar energy storage system. It introduces the effect of the energy storage system in the peak peak Pinggu in the wind and scenery combined power generation system, and studies the overall power control strategy of the system of wind and solar energy storage system. According to the given control strategy, the active power control and reactive power control of the joint power generation system are analyzed in detail. The power control strategy of the wind generator system, the photovoltaic electronic system, the energy storage subsystem and the corresponding control strategy chart are given in detail. Finally, the control strategy is analyzed in detail. Finally, the control strategy is analyzed in detail. Finally, the control strategy is analyzed in detail. The control strategy of charge and discharge of the battery is given. (3). The control of grid current control and inverter bandwidth control is studied in view of the grid connected current and the DC/AC inverter dead zone bandwidth in the wind and solar energy storage system. The DC component and the instability of the grid current in the wind and solar power generation system are studied, and the PR control is carried out. The system is replaced by a quasi PR controller (QPR) with harmonic compensation and more practical, and applied to the DC control of a three-phase grid connected inverter. In the improvement of the traditional PR controller, the amplitudes and phases are modified by the proportions and phase compensators respectively, and a new controller is designed and used in the steady-state error control of the grid connected current. In view of the current dead zone of the grid connected inverter, the traditional control strategy is corrected, and a new control strategy is obtained. The new control strategy is applied to the inverter dead band bandwidth control, and the simulation analysis of the three controllers is carried out in the double closed loop control system.

【学位授予单位】：河南师范大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM61

【参考文献】