分布式电源高渗透配电网无功优化调控方法

论文总字数：20261字

摘 要

传统配电网由于分布式发电（Distributed Generation，DG）的接入，其能量单向流通特性被改变，电压特性（包括稳态和暂态）也因与DG采用电力电子变换器的连接方式发生了明显改变，这些对配电网电压控制来说，是一项很大的挑战。从稳态方面讲，配电网的无功特性会因小规模分布式电源接入而受到局部影响，一旦大量分布式电源并入配电网会直接影响其全局无功特性。

分布式电源大量并入配电网后，因其与配电网的交换功率随外部因素（如光照、风速等）变化而快速变化，传统无功控制设备难以适应其随机性。风电、储能电池、光伏电池等由逆变器并入配电网的分布式电源及微型燃气轮机等直接并入配电网的分布式电源不仅能够向配电网输送有功功率，而且也可以输送一定容量的无功功率。当前，配电网无功优化控制主要由可投切并联电容器SC和载调压变压器OLTC协调工作。本文主要讨论将有连续无功调节能力的分布式电源的和传统电压调节手段相结合，来提升配电网运行经济性和安全性。

关键词：分布式电源；配电网；高渗透；无功电压协调优化控制；

Abstract

Due to the distributed generation (DG) access, the energy of one-way flow characteristic of Traditional distribution network was changed, and voltage characteristics (including steady state and transient state) also be changed a lot because of the connection mode of DG and the power electronic converter. It has been a big challenge for voltage control of distribution network reactive power. From the steady state, the reactive power characteristics of the distribution network will be affected by small scale access of distributed power. Once a large number of distributed power supply be incorporated into the distribution network, which will directly affect the global reactive power characteristics.

After a large number of distributed power be incorporated into the distribution network, Along with the change of the external factors (such as light, wind) change the exchange of power and distribution network. It’s difficult for the traditional reactive power control equipment to adapt to its randomness.

Some distributed power such as Wind power, Energy storage battery, Photovoltaic cell and so on is incorporated into the distribution network by the inverter. Some distributed power such as micro gas turbine is directly incorporated into the distribution network. Not only can they convey active power to the distribution network, but also convey reactive power. At present, reactive power optimization control of the distribution network is mainly composed of the parallel capacitor SC and the load voltage transformer OLTC.

In this paper, we will mainly discuss the combination of the distributed power supply and the traditional voltage regulation means to improve the operation economy and security of the power distribution network.

Keywords: Distributed generation; distribution network; high permeability; reactive power and voltage coordinated optimization control;

目录

摘要 I

Abstract II

目录 III

第一章 绪论 1

1.1 课题研究背景和意义 1

1.2 含DG配电网的无功调控方法研究现状 2

1.3 本文主要工作 3

第二章 分布式电源高渗透配电网理论研究 4

2.1 分布式电源的基本研究 4

2.1.1 常见的分布式电源 4

2.1.2 光伏电池模型 4

2.2 分布式电源对配电网的影响 8

2.2.1 分布式电源对配电网潮流的影响 8

2.2.2 分布式电源对配电网电压的影响 8

2.3 分布式电源高渗透率配电网的运行特性 9

2.4 本章小结 10

第三章 传统与新型无功设备的无功调节策略 11

3.1 传统无功调控设备 11

3.1.1 并联电容器 11

3.1.2 静止无功补偿器 12

3.1.3 有载调压变压器 13

3.2 新型无功补偿调控设备 13

3.2.1 分布式电源 13

3.2.2 储能技术 14

3.3 本章小结 15

第四章 分布式电源高渗透配电网无功优化调控方法 16

4.1 常规配电网无功优化调控方法 16

4.2 基于最优潮流的无功优化调控方法 17

4.2.1 支路潮流建模 17

4.2.2 基于支路潮流模型的最优潮流建模 19

第五章 仿真分析 22

5.1 光伏出力对配电网影响的仿真分析 22

5.2 配电网无功优化调控策略及仿真 24

5.2.1 分布式光伏无功优化 25

5.2.2 分布式光伏与SVC协调优化 26

5.2.3 分布式光伏与SVC、CB协调优化 27

第六章 总结与展望 28

6.1 结语 28

6.2 展望 28

致谢 29

参考文献 30

绪论

剩余内容已隐藏，请支付后下载全文，论文总字数：20261字