基于32位浮点DSP的变压器保护的研制
|
摘要
励磁涌流的快速鉴别仍然是当前变压器保护面临的一个难点，在实际应用中广泛采用二次谐波制动原理和间断角原理来鉴别励磁涌流。在间断角原理变压器差动保护中，需要测量差动电流导数波形的间断角。在数字式保护中，如果用差分代替求导将导致噪声的百分比误差随着采样频率的提高而剧增，本文对此进行了分析并提出了用分段样条函数最小二乘法来计算电流波形的导数值，以便在提高采样率的同时降低噪声误差的影响，并将其应用于基于32位浮点DSP的新型变压器保护装置。
The fast discrimination between magnetizing in-rush current and fault current is a difficulty in transformer protection presently. To solve this problem, second harmonies restraint and dead angle are used widely in practical application. Dead angle of differential currents is measured when realizing the transformer differential protection based on the dead angle. In digital relay, the percentage of noise will increase rapidly with the increase of sampling rate when derivation calculus is substituted by sampled difference term. To solve this problem, a new method using fragment function integrated with the least square algorithm is proposed in this paper. The influence of white noise is greatly reduced and the accuracy of the dead angle calculation is nicely improved after adopting the new method. And it is also used in the new type device of transformer protection based on 32-Bit Floating-Point DSP.
The fast discrimination between magnetizing in-rush current and fault current is a difficulty in transformer protection presently. To solve this problem, second harmonies restraint and dead angle are used widely in practical application. Dead angle of differential currents is measured when realizing the transformer differential protection based on the dead angle. In digital relay, the percentage of noise will increase rapidly with the increase of sampling rate when derivation calculus is substituted by sampled difference term. To solve this problem, a new method using fragment function integrated with the least square algorithm is proposed in this paper. The influence of white noise is greatly reduced and the accuracy of the dead angle calculation is nicely improved after adopting the new method. And it is also used in the new type device of transformer protection based on 32-Bit Floating-Point DSP.
引文
[1] 史世文，大机组继电保护，水利电力出版社。
[2] Blackburn J L et al. Applied Protection Relay. 1979
[3] Liu Pei, Malik O P, Chen Deshu. Improved Operation of Differential Protection of Power Transformers for Internal Faults. IEEE Trans on Power Delivery. 1992. 7 (4)
[4] 华中理工大学，南京电力自动化设备厂。WBZ-500型微机保护用户手册。1994．5
[5] 王祖光，间断角原来的变压器差动保护，电力系统自动化，1997，(1)
[6] 唐跃中、刘勇等。几种变压器励磁涌流判别方法的特点及其内在联系的分析。电力系统自动化，1995，19(9)：53～59
[7] 孙志杰、陈云仑。波形对称原理的变压器保护。电力系统自动化，1996，20(4)42～46。
[8] 焦邵华、刘万顺、刘建飞等。用小波理论区分变压器的励磁涌流和短路电流的新原理。电机工程学报，1999，19(7)
[9] 贺家李、宋从炬，电力系统继电保护，水利电力出版社
[10] 陈曾田，电力变压器保护，电力工业出版社
[11] G. D. Rockefella, Fault protection with a digital Computer, IEEE Trans.PAS88.NO.4.1969
[12] J. S. Thorp, A. G. Phadke, A Microprocessor_Based Voltage Restrained, Three Phase transformer Differential Relay, Proceeding of the South Eastern Symposium on System Theory, 1982. 4, P312—316
[13] 王维俭译，变压器保护新技术：考虑励磁特性的保护新技术，(日)电气计算，49(5)
[14] A. G. Phadke and J. S. Thorp, A New Computer_based Flux Restrained Current Differential Relay for Power Transformer Protection, IEEE Trans on Power Aparatus and System, 1983. 11, 102(11), P3624—3629
[15] 郭勇，大型变压器微机继电保护的研究，华中理工大学硕士论文，1987
[16] Keizo Inagaki, etal, digital Protection Method for Power Transformer Based on and Equivalent Circuit Composed of Inverse Inductance, IEEE Trans on Power Delivery, 1988. 10, 3 (4)
[17] 徐习东、何奔腾。变压器差动保护中CT饱和后间断角的测量。电力系统自动化，1998，22(5)
[18] 国电南瑞科技股份有限公司，NSR800变压器保护装置技术说明书
[19] 何奔腾、徐习东，波形比较法变压器差动保护原理，电机工程学报，1998．11
[20] 杨奇逊，微型机继电保护基础，中国电力出版社
[21] 王毅非，最小二乘算法的研究与改进，继电器，2000．3
[22] 张宁等，MC68332单片机结构与应用，北京航空航天大学出版社
[23] ADSP-2106X SHARC User's Manual
[24] C Compiler and Library Manual for ADSP-21ⅩⅩⅩ Family DSP's
[25] 吴敏渊、金伟正等，ADSP系列数字信号处理器原理，电子工业出版社
[26] 刘书明、罗军辉，ADSP SHARC系列DSP应用系统设计，电子工业出版
社
[27] VisualDSP++ User's Guide for ADSP-21ⅩⅩⅩ Family DSP's
[28] ADI Corp. VisualDSP++ 3.0 Kernel (VDK) User's Guide.
[29] San Jose. True Real-Time Embedded Systems Engineering: Building Hard Real-Time System Using Deadline Monotonic Analysis. Embedded Systems Conference, 1999
[30] A. T. I., Nucleus PLUS Reference Manual
[2] Blackburn J L et al. Applied Protection Relay. 1979
[3] Liu Pei, Malik O P, Chen Deshu. Improved Operation of Differential Protection of Power Transformers for Internal Faults. IEEE Trans on Power Delivery. 1992. 7 (4)
[4] 华中理工大学，南京电力自动化设备厂。WBZ-500型微机保护用户手册。1994．5
[5] 王祖光，间断角原来的变压器差动保护，电力系统自动化，1997，(1)
[6] 唐跃中、刘勇等。几种变压器励磁涌流判别方法的特点及其内在联系的分析。电力系统自动化，1995，19(9)：53～59
[7] 孙志杰、陈云仑。波形对称原理的变压器保护。电力系统自动化，1996，20(4)42～46。
[8] 焦邵华、刘万顺、刘建飞等。用小波理论区分变压器的励磁涌流和短路电流的新原理。电机工程学报，1999，19(7)
[9] 贺家李、宋从炬，电力系统继电保护，水利电力出版社
[10] 陈曾田，电力变压器保护，电力工业出版社
[11] G. D. Rockefella, Fault protection with a digital Computer, IEEE Trans.PAS88.NO.4.1969
[12] J. S. Thorp, A. G. Phadke, A Microprocessor_Based Voltage Restrained, Three Phase transformer Differential Relay, Proceeding of the South Eastern Symposium on System Theory, 1982. 4, P312—316
[13] 王维俭译，变压器保护新技术：考虑励磁特性的保护新技术，(日)电气计算，49(5)
[14] A. G. Phadke and J. S. Thorp, A New Computer_based Flux Restrained Current Differential Relay for Power Transformer Protection, IEEE Trans on Power Aparatus and System, 1983. 11, 102(11), P3624—3629
[15] 郭勇，大型变压器微机继电保护的研究，华中理工大学硕士论文，1987
[16] Keizo Inagaki, etal, digital Protection Method for Power Transformer Based on and Equivalent Circuit Composed of Inverse Inductance, IEEE Trans on Power Delivery, 1988. 10, 3 (4)
[17] 徐习东、何奔腾。变压器差动保护中CT饱和后间断角的测量。电力系统自动化，1998，22(5)
[18] 国电南瑞科技股份有限公司，NSR800变压器保护装置技术说明书
[19] 何奔腾、徐习东，波形比较法变压器差动保护原理，电机工程学报，1998．11
[20] 杨奇逊，微型机继电保护基础，中国电力出版社
[21] 王毅非，最小二乘算法的研究与改进，继电器，2000．3
[22] 张宁等，MC68332单片机结构与应用，北京航空航天大学出版社
[23] ADSP-2106X SHARC User's Manual
[24] C Compiler and Library Manual for ADSP-21ⅩⅩⅩ Family DSP's
[25] 吴敏渊、金伟正等，ADSP系列数字信号处理器原理，电子工业出版社
[26] 刘书明、罗军辉，ADSP SHARC系列DSP应用系统设计，电子工业出版
社
[27] VisualDSP++ User's Guide for ADSP-21ⅩⅩⅩ Family DSP's
[28] ADI Corp. VisualDSP++ 3.0 Kernel (VDK) User's Guide.
[29] San Jose. True Real-Time Embedded Systems Engineering: Building Hard Real-Time System Using Deadline Monotonic Analysis. Embedded Systems Conference, 1999
[30] A. T. I., Nucleus PLUS Reference Manual
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |