An improved TS algorithm is put forward on the condition that reactive power compensation location and capacity have been identified in rural distribution lines. The Algorithm is based on capacitor optimal on-off model aimed at a minimum network loss, it can control the capacitor on-off according to the load changing and the system operation status and keep real-time voltage qualified and network loss minimum. A distributed control system is designed by using the algorithm to realize reactive power optimization, which is composed of reactive power optimal terminals and background control center. The terminal is in charge of data collection and transmission, on-off instruction receiving and executing. The control center in in charge of receiving data from every compensation point, calling control algorithm to process data, forming and sending instructions. GPRS technology is adopted to realize the system’s foreground-background communication. The actual application in some experimental networks has proved that the system can realize global optimal control for distribution lines, and is suitable to be widely used in rural distribution network.
A novel CIM-based approach is proposed to realize power enterprise data exchange under heterogeneous IT circumstance. CIM objects encoding specification by XML is introduced in this paper. The object is expressed by XML complex element, and the object’s properties are encoded by simple elements embedded in complex one. In order to solve some data interchange problems, a CIM/XSD schema which applies on CIM data syntax and data validation verification is established by using XML Schema Definition (XSD) technology, and an attribute group “AssociationAttributeGroup” is designed to serialize complex relationships of CIM objects. The attribute group provides syntax support for marshaling linkages of objects in certain two methods: “embedding” and “referring”. The two operators: serialization and deserialization are added to each CIM class. By this way, the CIM objects can make quickly and bidirectional alternation between memory objects and CIM/XML document. The algorithms of the two operators are designed in detail, which can implement complex object set bidirectional conversion efficiently. The case study shows that the CIM object encoding specification, the CIM/XML schema and the algorithms of serialization functions can be applied to exchange and share CIM data in electric power enterprise.
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