Main-sub-machine heterogeneous in-situ measurement control device applied on intelligent transformer substation

Abstract

The invention discloses a main-sub-machine heterogeneous in-situ measurement control device applied on an intelligent transformer substation. The device comprises a measurement control main machine and a measurement control sub machine. The measurement control sub machine acquires an actual voltage current simulation amount and a primary equipment position through an AC acquisition end and an input-output acquisition end, and furthermore performs calculation for obtaining an effective value. Furthermore the measurement control sub machine transmits a calculation result to the measurement control main machine through an optical fiber in a private communication protocol manner. The measurement control host machine receives a message and performs analysis. Furthermore the measurement control host machine converts the message to an MMS (industrial automation system manufacturing message specification) message to a station level network. The main-sub-machine heterogeneous in-situ measurement control device applied on the intelligent transformer substation has advantages of realizing in-situ mounting, facilitating secondary loop simplification, saving construction investment, facilitating operation management and improving AC sampling precision.

Description

technical field [0001] The invention relates to an intelligent substation, in particular to a heterogeneous on-site measurement and control device for master and sub-machines applied in an intelligent substation. Background technique [0002] The smart substation is an important part of the smart grid. It adopts advanced, reliable, integrated, low-carbon, and environmentally friendly smart equipment, and takes the digitalization of the whole station information, the networking of the communication platform, and the standardization of information sharing as the basic requirements, and automatically completes information collection, measurement, It is a substation with basic functions such as control, protection, metering and monitoring, and can support advanced functions such as real-time automatic control of the power grid, intelligent adjustment, online analysis and decision-making, and collaborative interaction as needed. [0003] In recent years, the relevant professional...

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Problems solved by technology

[0004] Problem 1: The protection level of the secondary equipment installed in the outdoor cabinet is low, the working environment is demanding, and the failure rate is high. A large number of equipment in the process layer of the intelligent station is installed in the outdoor cabinet. The operating environment of the outdoor cabinet is poor, and the protection level of the existing device is low. , the number of optical ports is large, the heat generation is large, the anti-electromagnetic interference ability is poor, and the failure rate is high

Auxiliary equipment such as outdoor cabinet air conditioners are installed to improve the operating environment of secondary equipment, but the reliability of the temperature control equipment itself is poor, the workload of operation and maintenance is large, and the effect is not good;

[0005] Problem 2: On-site commissioning and maintenance are complicated, installation and power outage time is long, and personnel carrying capacity is obviously insufficient. At this stage, there are many types of secondary equipment and secondary circuits. The workload of on-site wiring, configuration, commissioning and maintenance is heavy, and equipment testing Requires multi-interval equipment or even the whole station to accompany the stop, and it takes a long time for safety adjustment and maintenance

As the scale of the power grid continues to expand, the carrying capacity of the existing security and maintenance forces is insufficient, and it is difficult to support the needs of power grid construction and operation

[0006] Problem 3: The secondary "virtual circuit" cannot be visualized intuitively, and configuration file management and control is difficult. The intelligent station replaces the secondary circuit with optical cables, switches and configuration logic, and describes the connection relationship of the secondary equipment with the secondary system configuration file (SCD file). The secondary "virtual circuit" cannot be seen intuitively, the circuit configuration is complicated, the scope of influence of SCD file upgrade or device maintenance is difficult to define, and the configuration consistency between the SCD file and each IED device is also difficult to determine, and the safety risk is large; the secondary circuit maintenance isolation is not Obvious disconnection point, isolation and maintenance are difficult; there are many soft pressure plates, maintenance and safety measures are complicated, there are potential safety hazards of misoperation, and it is difficult to meet the safe operation requirements of the power grid

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