目前传统的母线保护设备在实际运行中还占相当大的份额，其原理落后，适应性不强，并且在运行上存在很多问题，如抗TA饱和能力差、对于转换型故障不能快速切除。本论文结合现场的实际运行要求，配合某保护公司研究开发了一种抗TA饱和能力强并且能快速动作于各种故障的母线保护装置。 论文通过研究目前电力公司在招标中对母线保护装置技术要求，在分析国内外现有电流差动保护判据的优缺点基础上，根据故障发生后故障量的特点，提出了一套新的母线差动保护综合判据；该综合保护判据打破了以往传统保护判据单一的局限性，主 要由差动启动元件、差动保护元件、故障母线选择元件构成，每个元件都有其详细的判据；另外通过分析TA饱和时的特性，提出了一套独特的TA饱和解决方案。分时段的差动保护综合判据及实用的TA饱和解决方案是本文两个显著的特点。 硬件采用双DSP并行处理，并对模拟量输入部分以及开入、开出部分做了简单介绍。结构软件设计上根据保护判据的自适应性将软件模块化，即根据故障发生的不同状态及故障发生后的不同时段投入相应的保护模块。差流数据处理模块和保护功能模块分开，不互相嵌套，各保护模块共享差流数据，使软件更为优化。 对母线保护装置进行了RTDS动模试验，实验证明本文所研究的母线差动保护是一种比较理想的保护，它能够根据母线的运行情况和故障状态的变化，实时改变动作判据，以便使其保护性能达到最优；并且抗TA饱和强，在区外故障TA饱和后转区内故障时，保护能正确动作。

Traditional busbar protection devices take up a considerable proportion in real operation nowadays. However, these devices are mostly hard to meet the actual requirements for their old principles and poor adaptabilities, many problems are also found in real operation, for example, they have a low capability of anti-saturation to TA and they can’t cut off faults of turnover type quickly. Combined with the requirements of real operation, a new type busbar protection device which has a high capability of anti-saturation to TA and cuting off faults of all kinds quickly is researched and designed in this paper. After researching the power companies in the tender on technical requirements of busbar protection devices at present and analyzing the advantages and disadvantages of the domestic and alien current differential protection criterions, an integrative judgement criterion of busbar protection based on the fault current characteristic is presented. This criterion is composed of differential starting component, differential protection component and trouble bus selection component, each component is in detail, which breaks the limitation that criterion of each traditional busbar protection device has a singul component. Moreover, a unique scheme to sovle the problem of anti-saturation to Ta is presented by analyzing its saturation characteristic. the divided-period integrative judgement criterion and the practical scheme to sovle the problem of anti-saturation to Ta are two notable features of this paper. The hardware is designed of parallel processing with double DSP, furthermore, the analog singal input part, the import and exit part are introduced simplely. The sorftware is designed modularly by the Self-adaptive judgement criterion, the modules of the digital processing and the protection function are detached, and every module shares the data each other, accordingly, the software is more optimized. Finally, the test result indicated that the adaptive busbar differential protection in this paper is one kind of quite ideal protection. It can real-time change protection criterion according to the change of busbar movement and fault station to enables its protection performance to achieve superiorly. besides, the protection has a high capability of anti-saturation to TA, it can operated correctly after the fault out of the area with the TA saturating converts to the fault in the area.