LCC-HVDC和VSC-HVDC输电系统的通用建模方法和运行特性分析
发布时间：2019-04-11 06:56
【摘要】：随着电力系统的发展需要和电力电子等技术的日趋完善,高压直流输电系统技术在远距离大容量输电、海底电缆送电、电力系统非同步互联等方面得到了快速广泛的发展应用。当前的高压直流输电技术主要包括传统的基于电网换相整流器高压直流输电技术LCC-HVDC和以全控型器件为基础的电压源换流器高压直流输电VSC-HVDC。随着直流输电工程的广泛应用,大规模交直流混合电网逐渐形成,电网的运行特性更加复杂。因此需对传统LCC-HVDC和VSC-HVDC系统的控制特性进行分析,通过构建合适的数学模型来研究复杂混合电网下的系统稳定性和故障特性,为电网分析提供标准和参考依据。本文以高压直流输电技术为研究对象,针对传统高压直流输电和电压源换流器型直流输电的通用化建模方法进行分析研究,仿真分析了两者在不同运行工况下的运行特性。主要工作如下:(1)针对传统高压直流输电系统,提出了典型LCC-HVDC输电系统的通用化建模方法,完善了主电路、控制系统和直流线路建模方法,详细分析了PSCAD/EMTDC环境下交流系统等值方法与参数,列出了LCC-HVDC输电系统主电路和控制电路的建模方法。所提出的典型LCC-HVDC输电系统通用化建模方法能够建立一种通用的、运行特性与实际相符的传统高压直流输电系统模型,能够准确地反映其运行特性,为现有的交直流混合电网分析提供了一种标准化建模方法,具有一定的参考价值。(2)针对电压源换流器型直流输电系统,提出了典型vsc-hvdc输电系统的通用化建模方法,给出了典型系统的参数选择,完善了换流站主电路、控制系统与直流线路的建模方法,提出了pscad/emtdc环境下典型vsc-hvdc输电系统的模型系统结构,详细地列出了该环境下主电路、控制系统和监控模块的建模方法,说明给出了pscad/emtdc环境下典型系统模型的全局变量意义。所提出的典型vsc-hvdc输电系统的通用化建模方法能够为vsc-hvdc输电系统的建模与仿真提供一种通用化的方法和标准,由此获得的vsc-hvdc输电系统运行特性分析能够为电网潮流计算和稳定性分析等传统电网分析问题的解决提供一定的参考价值。(3)根据lcc-hvdc和vsc-hvdc输电系统的通用化建模方法,分别建立了以银东lcc-hvdc直流输电工程和美国传斯贝尔vsc-hvdc直流输电工程的电磁暂态仿真模型。分析银东直流输电工程在正常、直流侧故障和换相失败时的运行特性,研究美国传斯贝尔直流输电工程在启动、有功类指令值阶跃和无功类指令值阶跃工况下的运行特性。这两种案例分析分别利用lcc-hvdc和vsc-hvdc的通用化建模方法进行分析,为两种直流输电系统的工程特性分析提供了一种简单、可靠、统一的思路。
[Abstract]:With the development of power system and the perfection of power electronics and other technologies, HVDC transmission technology has been widely developed and applied in long-distance and large-capacity transmission, submarine cable transmission, power system asynchronous interconnection and so on. The current HVDC technology mainly includes the traditional HVDC technology LCC-HVDC based on the commutation rectifier and the HVDC VSC-HVDC. based on fully controlled devices. With the wide application of HVDC transmission project, large-scale AC-DC hybrid power grid is gradually formed, and the operation characteristics of the grid are more complex. Therefore, it is necessary to analyze the control characteristics of the traditional LCC-HVDC and VSC-HVDC systems. By constructing a suitable mathematical model to study the stability and fault characteristics of the complex hybrid power grid, it is necessary to provide the standard and reference for the analysis of the power network. Taking HVDC technology as the research object, this paper analyzes and studies the general modeling method of the traditional HVDC transmission and the voltage source converter type HVDC transmission, and analyzes the operating characteristics of the two under different operating conditions by simulation. The main work is as follows: (1) aiming at the traditional HVDC transmission system, the general modeling method of typical LCC-HVDC transmission system is proposed, and the modeling method of main circuit, control system and DC line is improved. The equivalent method and parameters of AC system in PSCAD/EMTDC environment are analyzed in detail. The modeling methods of main circuit and control circuit of LCC-HVDC transmission system are listed. The general modeling method proposed in this paper can establish a universal HVDC transmission system model, which is consistent with the actual operation characteristics, and can accurately reflect the operational characteristics of the LCC-HVDC transmission system. This paper provides a standardized modeling method for the analysis of AC / DC hybrid power grid, which has certain reference value. (2) for voltage source converter type HVDC transmission system, a general modeling method of typical vsc-hvdc transmission system is proposed. The parameter selection of typical system is given, the modeling method of main circuit, control system and DC line of converter station is improved, and the model system structure of typical vsc-hvdc transmission system in pscad/emtdc environment is put forward. The modeling methods of main circuit, control system and monitoring module in this environment are listed in detail, and the global variable meaning of typical system model in pscad/emtdc environment is explained. The general modeling method of typical vsc-hvdc transmission system can provide a general method and standard for the modeling and simulation of vsc-hvdc transmission system. The analysis of operation characteristics of vsc-hvdc transmission system can provide some reference value for solving traditional power grid analysis problems such as power flow calculation and stability analysis. (3) according to lcc-hvdc and vsc-hvdc transmission system. The general modeling method of the system, The electromagnetic transient simulation models of lcc-hvdc HVDC project and vsc-hvdc HVDC project are established respectively. This paper analyzes the operating characteristics of Yindong HVDC project under normal condition, DC side failure and commutation failure, and studies the operating characteristics of the transmission project under the conditions of starting up, active and reactive power command values step-by-step and reactive power-type instruction value step-by-step in the start-up of the transmission project in the United States of America. These two cases are analyzed by using the general modeling method of lcc-hvdc and vsc-hvdc, which provides a simple, reliable and unified way to analyze the engineering characteristics of the two HVDC systems.
【学位授予单位】：上海交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM721.1
本文编号：2456180
[Abstract]:With the development of power system and the perfection of power electronics and other technologies, HVDC transmission technology has been widely developed and applied in long-distance and large-capacity transmission, submarine cable transmission, power system asynchronous interconnection and so on. The current HVDC technology mainly includes the traditional HVDC technology LCC-HVDC based on the commutation rectifier and the HVDC VSC-HVDC. based on fully controlled devices. With the wide application of HVDC transmission project, large-scale AC-DC hybrid power grid is gradually formed, and the operation characteristics of the grid are more complex. Therefore, it is necessary to analyze the control characteristics of the traditional LCC-HVDC and VSC-HVDC systems. By constructing a suitable mathematical model to study the stability and fault characteristics of the complex hybrid power grid, it is necessary to provide the standard and reference for the analysis of the power network. Taking HVDC technology as the research object, this paper analyzes and studies the general modeling method of the traditional HVDC transmission and the voltage source converter type HVDC transmission, and analyzes the operating characteristics of the two under different operating conditions by simulation. The main work is as follows: (1) aiming at the traditional HVDC transmission system, the general modeling method of typical LCC-HVDC transmission system is proposed, and the modeling method of main circuit, control system and DC line is improved. The equivalent method and parameters of AC system in PSCAD/EMTDC environment are analyzed in detail. The modeling methods of main circuit and control circuit of LCC-HVDC transmission system are listed. The general modeling method proposed in this paper can establish a universal HVDC transmission system model, which is consistent with the actual operation characteristics, and can accurately reflect the operational characteristics of the LCC-HVDC transmission system. This paper provides a standardized modeling method for the analysis of AC / DC hybrid power grid, which has certain reference value. (2) for voltage source converter type HVDC transmission system, a general modeling method of typical vsc-hvdc transmission system is proposed. The parameter selection of typical system is given, the modeling method of main circuit, control system and DC line of converter station is improved, and the model system structure of typical vsc-hvdc transmission system in pscad/emtdc environment is put forward. The modeling methods of main circuit, control system and monitoring module in this environment are listed in detail, and the global variable meaning of typical system model in pscad/emtdc environment is explained. The general modeling method of typical vsc-hvdc transmission system can provide a general method and standard for the modeling and simulation of vsc-hvdc transmission system. The analysis of operation characteristics of vsc-hvdc transmission system can provide some reference value for solving traditional power grid analysis problems such as power flow calculation and stability analysis. (3) according to lcc-hvdc and vsc-hvdc transmission system. The general modeling method of the system, The electromagnetic transient simulation models of lcc-hvdc HVDC project and vsc-hvdc HVDC project are established respectively. This paper analyzes the operating characteristics of Yindong HVDC project under normal condition, DC side failure and commutation failure, and studies the operating characteristics of the transmission project under the conditions of starting up, active and reactive power command values step-by-step and reactive power-type instruction value step-by-step in the start-up of the transmission project in the United States of America. These two cases are analyzed by using the general modeling method of lcc-hvdc and vsc-hvdc, which provides a simple, reliable and unified way to analyze the engineering characteristics of the two HVDC systems.
【学位授予单位】：上海交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM721.1
【参考文献】
相关期刊论文 前10条
1 汤广福;贺之渊;庞辉;;柔性直流输电工程技术研究、应用及发展[J];电力系统自动化;2013年15期
2 李爽;王志新;王国强;;基于改进粒子群算法的PIDNN控制器在VSC-HVDC中的应用[J];中国电机工程学报;2013年03期
3 何大清;蔡旭;;柔性直流输电的动态电流限幅控制[J];电网技术;2012年01期
4 赵成勇;陈晓芳;曹春刚;敬华兵;;模块化多电平换流器HVDC直流侧故障控制保护策略[J];电力系统自动化;2011年23期
5 梁海峰;李庚银;周明;李广凯;赵成勇;;电压源换流器高压直流输电的动态等效电路及其特性分析[J];中国电机工程学报;2010年13期
6 宋新立;吴小辰;刘文焯;许爱东;卜广全;金小明;;PSD-BPA暂态稳定程序中的新直流输电准稳态模型[J];电网技术;2010年01期
7 张静;徐政;王峰;;包含VDCCOL的VSC-HVDC改进控制策略[J];电力系统自动化;2008年22期
8 宋瑞华;周孝信;;基于电压源换流器的高压直流输电系统的阻尼特性与阻尼控制[J];电网技术;2008年05期
9 魏晓光;汤广福;郑健超;;电压源高压直流输电离散模型及其控制策略[J];中国电机工程学报;2007年28期
10 王晶芳;王智冬;李新年;胡涛;蒋卫平;王明新;向孟奇;李焕明;;含特高压直流的多馈入交直流系统动态特性仿真[J];电力系统自动化;2007年11期
相关博士学位论文 前2条
1 黄莹;交直流电力系统动态特性分析方法研究[D];浙江大学;2005年
2 张桂斌;新型直流输电及其相关技术研究[D];浙江大学;2001年
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