Management and control terminal of urban rail traffic low-voltage power distribution system

Abstract

The invention relates to a management and control terminal of an urban rail traffic low-voltage power distribution system. An existing rail traffic low-voltage power distribution system is low in the automation level. The management and control terminal comprises a host computer, an interface link A of the host computer, a forward measurement and control channel link B and a backward measurement and control channel link C. In the interface link A, a DPS is connected with a single chip microcomputer system, and a CPLD is connected with a combined system; the single chip microcomputer system is connected with an Ethernet port and a serial communication module through a magnetic coupler. In the forward measurement and control channel link B, a circuit three-phase voltage module, a current detection module and a circuit residual current detection module are connected to the DSP through signal conditioning; and a circuit temperature and humidity detection module is connected to the DSP through the magnetic coupler; a remote communication quantity detection module is connected to the CPLD and the combined system through the magnetic coupler. In the backward measurement and control channel link C, four open circuits are connected to the CPLD and the combined system through a power photoelectric coupler. According to the management and control terminal of the urban rail traffic low-voltage power distribution system, through real-time collection of electric power working condition parameters of the rail traffic low-voltage power distribution system, protection, monitoring, measurement, metering and load forecasting of a power distribution circuit are achieved.

Description

technical field [0001] The invention belongs to the technical field of power distribution management and control of urban rail transit, and in particular relates to a management and control terminal of a low-voltage power distribution system of urban rail transit. Background technique [0002] The establishment of an urban rail transit low-voltage power distribution system with intelligent features of "self-healing, integration, prediction, and optimization" is an important guarantee for improving the normal operation and scientific management and control of rail transit. At present, the "quasi" intelligent system built by stacking and combining multi-functional digital instruments, intelligent circuit breakers, Ethernet gateways, PLC controllers and other components in the field can realize the circuit breaker of low-voltage incoming lines of rail transit step-down substations. Remote measurement, remote control, and remote signaling functions of circuit breakers, bus tie ...

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