Application of SVG and Location package in graphics information exchange of power system

Two graphics exchange approaches recommended by CCAPI are compared,i.e.the graphics centric approach and the domain centric approach.It is pointed out that,the former is better in multiple graphics display,graphics extension and background data support.SVG(Scalable Vector Graphics) is the standard graphics format of power system recommended by IEC.The way of the graphics centric approach to standardize the graphics information exchange using IEC61968 Location package and SVG metadata model and to realize the consistent information understanding and graphics merging is studied.To avoid the redundancy information occurred in of synchronous request /reply graphics exchange mode and enhance the exchange efficiency,an asynchronous graphics exchange mechanism based on publish /subscribe architecture is proposed.An example of graphics merging and asynchronous information exchange between a power plant and a power station using SVG metadata model and location package is presented to prove its effectiveness.