Intelligent substation cluster measurement and control system and measurement and control method thereof

Abstract

The invention discloses an intelligent substation cluster measurement and control system and a measurement and control method thereof. The system comprises a cluster measurement and control device; the cluster measurement and control device comprises a plurality of virtual measurement and control devices, and each virtual measurement and control device comprises an NPI board used for receiving SVdata and interacting GOOSE data, a communication board used for MMS network communication, an input board used for hard input state acquisition, and a CPU board used for logic calculation; each virtual measurement and control device is corresponding to each real measurement and control device, and is put into operation when the real measurement and control devices fail or are abnormal. According to the invention, hidden troubles of data interruption and remote control failure caused by a single-point fault existing in a measurement and control function after a transformer substation spacer layer measurement and control device fails at present can be solved.

Description

technical field [0001] The invention relates to the field of intelligent substation measurement and control, in particular to an intelligent substation cluster measurement and control system and a measurement and control method thereof. Background technique [0002] Compared with traditional substations, smart substations have many advantages, mainly reflected in: (1) Using digital signal transmission and processing, it has a wide range of applications, high precision, stability and efficiency, and facilitates data sharing. As a digital transmission carrier, optical fiber has the advantages of large transmission capacity, low loss, long distance, strong anti-interference ability, good lightning protection performance, economical and environmental protection, etc. (2) The IEC61850 protocol is fully adopted, the information and communication models are unified, and the layered architecture of "three layers and two networks" is adopted to realize the digital collection of subst...

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Problems solved by technology

(2) The IEC61850 protocol is fully adopted, the information and communication models are unified, and the layered architecture of "three layers and two networks" is adopted to realize the digital collection of substation information and networked information exchange, but the measurement and control and voltage level protection of 110kV and below are both Using a single set of configuration, there is a hidden danger of function failure caused by a single point of failure, the overall reliability is not high, and it cannot fully meet the requirements of unattended substations, seriously affecting the safe and stable operation of the power system

[0007] (2) Failure to quickly discover fault measurement and control

Domestic research has also been conducted on the redundancy of measurement and control functions, and dual configuration of interval measurement and control is used to achieve functional redundancy. However, the simple dual configuration increases the number of devices, increases the workload of operation and maintenance and investment costs

In 2012, the State Grid Corporation of China proposed to research and build a new generation of smart substations. The new generation of smart substations tried to integrate functions in the compartment, and adopted a multi-functional measurement and control method integrating measurement and control, PMU, and metering functions. This method only reduces the number of equipment in the station. , did not realize the self-healing of interval measurement and control functions, and the integration of multiple disciplines also increased the difficulty of on-site operation and maintenance

Since 2015, more extensive and in-depth research has been carried out on integrated measurement and control, and a multi-interval measurement and control centralized scheme based on the principle of grouping has been proposed. mode, the dynamic deployment of interval functions cannot be realized, and the operation convenience and convenience of reconstruction and expansion are poor

The simple integration of measurement, control and protection modules, on the one hand, cannot adapt to data access under complex power grids, on the other hand, it puts forward high requirements for on-site configuration work, which is not conducive to large-scale promotion and application

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