储能对系统新能源消纳能力的影响研究

论文总字数：17234字

摘 要

近年来在环境污染、能源短缺与全球可持续发展的背景下，风能已经被开发和大规模利用。由于风电的波动性和随机性，风电并网后会对电力系统造成一定的冲击，特别是近些年来，风力发电机组装机的容量不断增加，使得风电机组并网对电力系统的影响越来越大，严重的时候甚至会拖垮电网，因此必要的时候风电场不得不通过弃风运行来维持电网的稳定，这样就造成了大量的风资源浪费。本文针对当前风电场中弃风严重的现象，引入储能对系统新能源消纳能力的影响研究。在本文的研究中，针对风电出力基本特性、风电接入对系统的影响、影响系统风电消纳能力的主要因素、风力发电的建模、储能的种类、系统消纳能力的定量计算、含储能系统的风电电力系统的建模及其算法等进行了深入研究，在综合考虑风电出力特性的基础上以风电消纳能力最大为目标，构建了包含火电、储能电站、大规模风电的模型，引入了可靠性评估的指标来计算系统的风电消纳能力；接着本文又引入了一些可靠性指标来评估加入储能系统后整个系统的风电消纳能力，最后通过对某区域电力系统进行仿真计算的结果进行分析。研究成果丰富和完善了风力发电和电力系统的相关理论，为解决当前风电并网难的问题提供了一些简单的参考。

关键词：风电消纳；储能系统；可靠性评估

Study on the Impact of Energy Storage on the New Energy Absorption Capacity of the System

Abstract

In recent years, under the background of environmental pollution, energy shortage and global sustainable development, wind energy has been exploited and utilized on a large scale. Because of the volatility and randomness of wind power, wind power Grid-connected will have certain impact on power system. Especially in recent years, the increasing capacity of wind turbine assemblies makes the impact of wind power Grid-connected on power system more and more serious, and even drags down the power grid. Therefore, wind farms have to maintain the stability of power grid by abandoning the wind when necessary. In this way, a lot of wind resources are wasted.In view of the serious phenomenon of wind abandonment in wind farms, this paper proposes a study on the impact of energy storage on the new energy absorption capacity of the system. In this paper, the basic characteristics of wind power output, the impact of wind power access on the system, the main factors affecting the system's wind power absorption capacity, the modeling of wind power generation, the types of energy storage, the quantitative calculation of the system's absorption capacity, the modeling of wind power system with energy storage system and its algorithm are studied in depth. Aiming at maximizing the wind power absorptive capacity, a model including thermal power, energy storage power and large-scale wind power is constructed, and the reliability evaluation index is introduced to calculate the wind power absorptive capacity of the system. Then, this paper puts forward the reliability gain ratio of energy storage to wind farm capacity, the insufficient gain coefficient of energy storage to wind farm power, and the limited penetration power gain coefficient of energy storage to wind electrode. Finally, the reliability index of high wind power absorption capacity is simulated by genetic algorithm for a regional power system. The research results enrich and improve the relevant theories of wind power generation and power system, and provide some simple reference for solving the current problem of wind power grid connection.

Key words: wind power absorption; energy storage system; reliability evaluation

目录

摘要 Ⅰ

Abstract Ⅱ

第一章 绪论 1

1.1选题的背景和意义 1

1.2国内外的研究现状 2

1.3本文的主要工作 2

第二章 系统消纳风电能力的影响因素分析 4

2.1引言 4

2.2风电出力基本特性 4

2.3风电接入对系统的影响 5

2.3.1风电对电网潮流及线路传输功率的影响 5

2.3.2风电对系统电压稳定性的影响 6

2.3.3风电对系统频率稳定性的影响 6

2.4影响风电消纳的主要因素 6

2.4.1系统调峰能力 6

2.4.2系统备用水平 6

2.4.3电网网架约束与送出 6

2.5风力发电的建模 7

2.5.1风速模型 7

2.5.2风电机组输出功率模型 8

2.6本章小结 9

第三章 储能对系统风电消纳能力的影响 10

3.1引言 10

3.2储能的种类 10

3.3含储能系统的风电电力系统的建模 10

3.3.1建模的假设条件 10

3.3.2目标函数 10

3.3.3约束条件 11

3.4可靠性评估的指标 12

3.5算例分析 12

第四章 总结与展望 16

4.1总结 16

4.2对未来的展望 16

致谢 17

参考文献 18

储能对系统新能源消纳能力的影响研究

1. 绪论

1.1选题的背景和意义

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