GB/T 39226-2020 in English

VALID

Requirements on the integrated test for high power converter system of magnetic confinement fusion

Issued on:2020-11-19
Implemented on:2021-06-01
File Format:PDF
Delivery:Via email within 5 business days

Price(USD)： $310.00
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Standard No:	GB/T 39226-2020
Document status:	VALID
Title in English:	Requirements on the integrated test for high power converter system of magnetic confinement fusion
Title in Chinese:	磁约束聚变大电流变流系统集成测试要求
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 5 business days
Issued on:	2020-11-19
Implemented on:	2021-06-01
ICS Classification:	27.120-Nuclear energy engineering
Chinese Classification:	F60-Nuclear reactor in general
Professional Classification:	GB-National Standard
Related Keywords:	standard test dimensions four-quadrant converter single converter key indicators current test test items integrated test test process
Related Topics:	Rheology rheological system Integration Testing system integration Integration Test Requirements Rheological test sample preparation Rated current test Integration Test Trials Fluid Test System Rheological test analysis Change Current Test System Test Process Method system integration testing process Material rheology test flow system magnetic confinement flow system Test System Composition end of test current it current in english Convert magnetism to electricity magnetic confinement System Testing and Integration current it end of test test current Current detection system GBT39226 GB/T 39226-2020 Integration Test Requirements electric current Emulsion rheology test system integration standards Torque rheology test Measure four rheology Magnetic strain testing

《GB/T 39226-2020磁约束聚变大电流变流系统集成测试要求》由TC58（全国核能标准化技术委员会）归口，TC58SC6（全国核能标准化技术委员会核聚变分会）执行，主管部门为国家标准化管理委员会。

Introduction

Analysis of the core content of the standard

Test dimensions	Four-quadrant converter	Single converter	Key indicators
Required test items	11 items	8 items	Circulating current operation/voltage response as a special item
Trigger angle accuracy	±1°	±1°	Synchronous signal test guarantee
Current balance	≤10%	≤10%	Core parameters of parallel operation
Circulating current control	Mandatory requirements	-	Zero point smooth transition technology

Key technical points

1. Twelve-pulse four-quadrant architecture

The standard recommended four-quadrant converter unit adopts a double anti-parallel six-pulse bridge to form a twelve-pulse structure, and realizes bidirectional energy flow through the coordinated work of the forward converter bridge (CU1/CU3) and the reverse converter bridge (CU2/CU4). Appendix A schematic diagram shows that it includes:

Circulating inductor (Lr) - maintain zero current continuity
DC disconnector (DS) - operation mode switching
External bypass module - fault current transfer

2. Triple operation mode

Circulating operation mode

When the load current |Id| is less than 5% of the rated value, the system automatically enters the circulating state. At this time:

Forward bridge current If = (Id + Ic)/2 Reverse bridge current Ir = (Ic - Id)/2 Where Ic is the preset circulating current value (usually 3-5% of the rated current)

Engineering case

In the EAST tokamak experiment, this mode was used to successfully achieve continuous and smooth reversal of plasma current, with a transition time of less than 50ms.

Test process in-depth optimization

Step current test: 30%→60%→80%→100% rated current segmented verification
Temperature monitoring strategy: key parts (fast fuse/busbar) temperature measurement every 15 minutes, ΔT≤70K
Fault simulation sequence: water system failure → fast fuse failure → communication interruption