Compact-type digital protection and control equipment for power systems

The introduction of the competitive principle into the power industry has also led to growing demands for more compact and cost-effective devices, while maintaining high levels of reliability and capability in digital products. To meet these requirements, Hitachi has developed compact-type digital protection and control equipment that employs a 32-bit reduced instruction set computer (RISC) processor and is compatible with open networks that support general-purpose communications interfaces, such as IEC 60870-5-103, the transmission control protocol/Internet protocol (TCP/ IP), and the distributed network protocol (DNP) 3.0. This equipment provides a superlative ease of use, with features such as the avoidance of human errors by the overall application of an interactive automatic software generating system, and efficiency evaluation at the design stage by the use of logic simulations. In addition, the application of general-purpose communications interfaces and a transportable human interface enabled by ordinary browsers has led to greater flexibility of maintenance and operation capabilities, and has also created a system configuration that will cope with future requirements in information technology (IT).