Design of UHVDC Converter Station特高压直流换流站设计英文英文文献原

Design of UHVDC Converter Station特高压直流换流站设计

英文英文文献原文

H .Huang,Senior member,IEEE,and V. Ramaswami

Abstract

Ultra HVDC transmission system (UHVDC) provides significant benefits for bulk power transmission over extreme long distance. There are numerous UHVDC projects are currently in planning world wide, particularly for large hydro power schemes in China. This paper discusses the major design aspects of a UHVDC converter station with focus on the difference to the conventional HVDC schemes. The possible converter configurations are discussed and evaluated. The basic design parameters for a 800kV/6400 MW UHVDC system are provided. The AC harmonic filters and reactive power compensations requirements are shown. Detailed discussions on the principles of insulation coordination including suggested arrester schemes are given. Further more this paper addresses station design aspects like indoor and outdoor installation, noise damping measures and reliability considerations in general。

INTRODUCTION

Large HVDC transmission schemes over distances between 1000 km and 2000 km are currently under planning for various

large hydropower stations in China. Ultra high de voltage (UHVDC) in the range of 800kV is the preferred de voltage level for these applications. This document summarized the basic design data of an UHVDC scheme at UHV level 800kV for power rating exceeding 6000 MW:

The UHVDC Transmission Project is designed as a bipolar scheme with a continuous rating defined at the DC side of the rectifier station. Normal power flow is in one direction, while power reversal shall be possible as per inherent capability. The rated continuous transmission power will be met without any redundant cooling equipment in service at the specified maximum ambient dry bulb temperatures.

SECTION II

BASIC CONFIGURATION AND PARAMETERS

A. DC Transmission Data

The following transmission data are defined on the DC side at the rectifier station:

A single 12 pulse bridge per pole, as in a conventional HVDC scheme, is a preferred solution for the state-of-the-art HVDC system. However, it is likely that two 12 pulse bridges (2 valve groups) in series per pole are the only feasible solution for the rectifier station due to limitations in the permissible transport dimensions for the large equipment.

If an arrangement of two twelve pulse bridges per pole is required, both symmetrical and different bridge voltages are possible (400/400kV, 300/500kV).

From manufacturing point of view a 500kV twelve pulse