• CSCD核心库收录期刊
  • 中文核心期刊
  • 中国科技核心期刊

电力建设 ›› 2015, Vol. 36 ›› Issue (9): 69-72.doi: 10.3969/j.issn.1000-7229.2015.09.011

• 特高压直流输电技术专辑 • 上一篇    下一篇

UHVDC高端换流变阀侧电压PCOV的一种数字仿真模型

钱珞江1,李高望2, 李存军3   

  1. 1.武汉大学电气工程学院,武汉市 430072;2. 国网北京经济技术研究院,北京市 102209; 3.舟山市质量技术监督检测研究院,浙江省舟山市 316000
  • 出版日期:2015-09-01
  • 基金资助:

    国家电网公司科技项目(多换流器并联特高压直流输电工程的关键技术研究)

A PCOV Digital Simulation Model of HV Transformer Valve Side Voltage in UHVDC System

QIAN Luojiang1, LI Gaowang2, LI Cunjun3   

  1. 1. School of Electrical Engineering, Wuhan University, Wuhan 430072, China;2. State Power Economic Research Institute, Beijing 102209, China; 3.Zhoushan Institute of Calibration and Testing for Quality and Technology Supervision, Zhoushan 316000, Zhejiang Province, China
  • Online:2015-09-01
  • About author:钱珞江(1961),男,博士,副教授,主要从事电力系统运行与控制、电力系统仿真技术等方面的研究;; 李高望(1985),男,博士,工程师,通信作者,主要从事直流输电系统过电压与绝缘配合方面的研究;; 李存军(1966),男,高级工程师,主要从事设备技术检测管理方面的工作。

摘要:

高端换流变阀侧电压的持续运行最大峰值(peak value of the continuous operating voltage,PCOV)是特高压直流换流站直流避雷器参数设计和绝缘配合方案评估的一个重要数据。利用RTDS的非实时运算功能,本着尊重实际工程事实的原则及突出关键点、保留关联点和等效次要点的基本方式,通过采用自定义阀元件模型、低端换流器等效为可调直流源、控制系统依运行特性最简化等建模技术,建立了一种能够模拟换相过冲暂态过程、计算高端换流变阀侧电压PCOV的数字仿真高频模型,并且以向家坝—上海SymbolqB@800 kV直流输电工程为实例,从不同运行工况和不同设备参数的角度对模型准确性和可用性进行了分析和验证。

关键词: 高端换流变阀侧电压, 持续运行最大峰值, 直流避雷器, 换相过冲, 数字仿真模型

Abstract:

The peak value of continuous operating voltage (PCOV) of HV transformer valve side voltage is an important data for the design of DC arrester parameters and the evaluation of insulation coordination scheme in UHVDC converter stations. Utilizing non real time operation functions of RTDS (real time digital simulator), in respect of the principle of the actual engineering facts, as well as to highlighting the key points, retain the related points and get equivalent of no significant points, this paper established a digital simulation high-frequency model which could simulate commutation overshoot transient process and calculate the PCOV of HV transformer valve side voltage with using multiple modeling techniques such as user-define valve component, adjustable DC voltage source equivalent for LV converter, the most simplification for control system according to the operating characteristics and so on. Taking Xiangjiaba-Shanghai ±800 kV UHVDC transmission project as an example, the accuracy and availability of the model were analyzed and verified from aspects of different operating conditions and equipment parameters.

Key words:  HV transformer valve side voltage, peak value of continuous operating voltage (PCOV), DC arresters, commutation overshoot, digital simulation model

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