发明名称 |
Method and arrangement for voltage measurement |
摘要 |
A method and an arrangement for voltage measurement with a transformer configuration comprising three single pole voltage transformers having tertiary windings open-delta connected with each other. The arrangement is configured to apply a correction to measured secondary voltages on the basis of one or more parameters of the voltage transformers and/or one or more quantities in a known relation to one or more parameters of the voltage transformers, one or more parameters of a circuit connected to the secondary windings and/or one or more quantities in a known relation to one or more parameters of the circuit connected to the secondary windings, and one or more parameters of a circuit connected to the tertiary windings and/or one or more quantities in a known relation to one or more parameters of the circuit connected to the tertiary windings. |
申请公布号 |
US8838402(B2) |
申请公布日期 |
2014.09.16 |
申请号 |
US201213647548 |
申请日期 |
2012.10.09 |
申请人 |
ABB Technology AG |
发明人 |
Wahlroos Ari;Altonen Janne;Mähönen Pentti |
分类号 |
G01R19/00;G06F11/30 |
主分类号 |
G01R19/00 |
代理机构 |
Buchanan Ingersoll & Ronney PC |
代理人 |
Buchanan Ingersoll & Ronney PC |
主权项 |
1. A method for voltage measurement with a transformer configuration including three single pole voltage transformers each respectively having a primary winding, a secondary winding and a tertiary winding, wherein the primary windings are connected to primary voltages and the tertiary windings of the voltage transformers are open-delta connected with each other, the method comprising:
measuring secondary voltages from the secondary windings; and determining values of the primary voltages on the basis of the secondary voltages measured from the secondary windings and a turns-ratio between the primary winding and the secondary winding, wherein the determining of the values of the primary voltages comprises: applying a correction to the measured secondary voltages on the basis of: at least one of (i) one or more parameters of the voltage transformers and (ii) one or more quantities in a known relation to one or more parameters of the voltage transformers, at least one of (iii) one or more parameters of a circuit connected to the secondary windings and (iv) one or more quantities in a known relation to one or more parameters of the circuit connected to the secondary windings, and at least one of (v) one or more parameters of a circuit connected to the tertiary windings and (vi) one or more quantities in a known relation to one or more parameters of the circuit connected to the tertiary windings. |
地址 |
Zurich CH |