Current summation method for internal bridging line independent of circuit breaker and position of disconnecting link

Abstract

The invention discloses a current summation method for an internal bridging line independent of a circuit breaker and a position of a disconnecting link. An intelligent substation merging unit and a device maintenance pressing plate for an intelligent electricity meter are utilized, a device maintenance state of a wire inlet merging unit, a device maintenance state of a bridge merging unit and a device maintenance state of the intelligent electricity meter are fully considered through vectors and logics, and when the states are consistent, a corresponding sample value (SV) is counted into a vector sum calculation principle. The corresponding SV is counted into the vector sum calculation principle due to consistent states, the current on a main variable high-voltage side is easily calculated, and the electric energy metering requirements are met, namely the device maintenance states are fully utilized and the wire inlet circuit breakers, bridge circuit breakers and the position of the disconnecting link in the conventional method are not depended; and an independent variable high merging unit is not required to be configured, the cost is saved, the internal logic is simple, and due to human manual operation, the error probability is low.

Description

technical field [0001] The invention relates to an electric energy metering method of an internal bridge connection in an intelligent substation, in particular to a current summation method for an internal bridge connection in an intelligent substation independent of the position of a circuit breaker and a knife switch. Background technique [0002] In the smart substation, the merging units are configured according to the distribution of circuit breakers. For a transformer whose high-voltage side is connected to an outer bridge, the current collected by the variable-height merging unit is the current on the high-voltage side of the main transformer. However, for a transformer whose high-voltage side is connected to an inner bridge, the vector sum of the current collected by the incoming line merging unit and the current collected by the bridge merging unit can represent the current on the high-voltage side of the main transformer. [0003] At present, most of the smart met...

AI Technical Summary

Problems solved by technology

However, this method needs to add an additional main transformer variable height merging unit. In addition, the internal logic depends on the error-prone incoming circuit breaker, bridge circuit breaker and auxiliary nodes of the main transformer variable height switch. The position information reflected by the auxiliary nodes does not directly affect The calculation of the vector sum, so the probability of error is high, and it is easy to affect the measurement of the main transformer high-power meter

Images