All-station power quality monitoring device and monitoring method applicable to intelligent transformer substation

Abstract

The invention relates to an all-station power quality monitoring device and monitoring method applicable to an intelligent transformer substation, and belongs to the technical field of power supply management. The device mainly comprises a main system utilizing a multi-core processor as a core, process-level Ethernet communication cards, a station-level Ethernet communication card, a data memory module, an MMI (multimedia interface) module, a device debugging module and a power module, wherein the multi-core processor is connected with the process-level Ethernet communication cards, the station-level Ethernet communication card and the data memory module through expansion slots of a PCIE (peripheral component interface express) bus, and is in communication connection with the MMI module and the device debugging module through a USB (universal serial bus) interface and a network interface respectively. According to the all-station power quality monitoring device and monitoring method applicable to the intelligent transformer substation, the Ethernet communication cards provide gigabit interfaces, so that all-station sampling value messages can be received by an Ethernet switch, and 60-way monitoring points can be simultaneously monitored at most.

Description

technical field [0001] The invention relates to a power quality monitoring device and method, in particular to a whole-station power quality monitoring device and a monitoring method suitable for an intelligent substation, belonging to the technical field of power supply management. Background technique [0002] With the development of automatic control technology and intelligent electrical, intelligent substations are more and more widely used, so how to carry out power quality monitoring in intelligent substations has become an urgent problem to be solved. [0003] An important technical feature of an intelligent substation is data sharing. All kinds of data are digitized from the source, and information integration, network communication, and data sharing are truly realized. In the acquisition of current and voltage, an intelligent electrical measurement system (such as photoelectric / electronic transformer) is used to realize the intelligent application of electrical qua...

AI Technical Summary

Problems solved by technology

The problems in this patent application are: 1) Only one monitoring point can be monitored, and the input terminal of the transmission module is directly connected to the merging unit, which is only suitable for receiving and processing point-to-point process layer sampling messages; 2) The network of the entire framework The processing power and computing power are limited, and dual-port RAM is used to transmit data between DSP plug-ins and EXT plug-ins, which will cause data flow processing bottlenecks, and cannot be expanded to realize power quality monitoring of multiple monitoring points in intelligent substations

The problems in this patent application are: 1) Although it can receive the optical fiber digital signal of the unified information platform of the intelligent substation, and through photoelectric conversion and protocol analysis conversion, obtain the instantaneous sampling data of voltage and current required for power quality analysis, but there is network processing capability bottleneck, it cannot process the sampling value messages output by the merging unit of the whole station, and cannot meet the requirements of power quality monitoring of the whole station; 2) Although the extended DSP processing module is adopted, it can theoretically meet the requirements of the computing power of the whole station, but it must be considered For all monitoring points in the whole station, many DSP processing plug-ins are required, so there are problems such as too complicated hardware, difficult control of power consumption, and poor operational reliability.

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