发明名称 |
A METHOD FOR CORRECTING EFFECT OF SATURATION IN CURRENT TRANSFORMER AND AN INTELLIGENT ELECTRONIC DEVICE THEREFOR |
摘要 |
A method for generating corrected measured current in an Intelligent Electronic Device (IED) that is a true representation of primary current in an electrical network is disclosed. The method uses regression and a first threshold on measured sampled values from CT to detect a deviation instance that indicates a possibility of saturation. Wavelet and second threshold based detection of instances of saturation is then done. Then a regression based correction that uses a dynamic correction factor is implemented in real time to obtain corrected sampled values i.e. corrected measured current. Ending of correction is done based upon a predetermined selection criterion, The generated corrected measured current is used for protection and control functions in the IED. A CT output re-generation module as a functional module in the IED for implementing the method as described above is also disclosed. |
申请公布号 |
WO2017001950(A1) |
申请公布日期 |
2017.01.05 |
申请号 |
WO2016IB52646 |
申请日期 |
2016.05.10 |
申请人 |
ABB TECHNOLOGY LTD. |
发明人 |
SATHEESH, Hariram;KANDE, Mallikarjun;GORE, Rahul;VALSAN, Simi |
分类号 |
G01R15/18 |
主分类号 |
G01R15/18 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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