Microgrid controller

A microgrid controller and microgrid technology, applied in the field of power transmission and distribution, can solve the problems of fixed control models and parameters, inability to support real-time digital simulation system decision support and other auxiliary functions, and reduce the reliability or efficiency of microgrids. achieve performance-enhancing effects

Active Publication Date: 2014-08-06
SHANGHAI ELECTRICGROUP CORP
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AI Technical Summary

Problems solved by technology

The microgrid controller operates independently according to the established control strategy, and its control model and parameters are relatively fixed. It is difficult to fully and accurately reflect the changes in the control parameters and protection parameters of the microgrid controller in different operating modes and states, and cannot s

Method used

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Examples

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Effect test

no. 1 example

[0027] see figure 2 , the microgrid controller is a controller that directly interacts with each distributed power supply, energy storage device, load, and execution switch in the microgrid, and is responsible for coordinating the different operations of each distributed power supply, energy storage device, and load in the microgrid. It operates in the mode, manages the control strategy and protection strategy in the microgrid, and ensures the safe and stable operation of the microgrid. The operation mode of the microgrid includes the grid-connected mode connected to the public grid and the island mode independent of the public grid.

[0028] The micro-grid controller includes a central processing unit 1 that operates with a time-division multitasking mechanism, a communication module 2 and a single-board computer relay protection module 3 . The central processing unit 1 and the communication module 2 form a PLC platform that adopts a time-sharing multi-task mechanism to ope...

no. 2 example

[0056] see image 3 , when the real-time digital simulation system 8 does not possess the GNet card 81, the micro-grid controller of the present invention adopts the following docking scheme:

[0057] The uplink communication module 25 of the communication module 2 includes an uplink digital output interface 252 , an uplink digital input interface 253 , an uplink analog output interface 254 and an uplink analog input interface 255 .

[0058]The central processing unit 1 sends switch control signals and trigger signals to the real-time digital simulation system 8 through the bus interface module 21 and the uplink digital output interface 252, and the DI port 82 of the real-time digital simulation system 8 receives the uplink digital output interface 252 to the real-time digital simulation system 8. The switch control signal and trigger signal sent are input into the simulation model in the simulation software RSCAD; the status signal and alarm signal generated by the simulation...

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Abstract

The invention discloses a microgrid controller in the field of power transmission and distribution. The microgrid controller comprises a central processor, a communication module and a single board computer relay protection module. The communication module comprises a bus interface module, a current and voltage measuring module, an AI/DI module and an AO/DO module. The bus interface module is provided with bus interfaces corresponding to all distribution power sources, energy storing devices and load controllers in a microgrid, a serial bus interface for being connected with the single board computer relay protection module, and an Ethernet interface for being connected with the central processor. The communication module is internally provided with an uplink communication module for being connected with a real-time digital simulation system. The central processor sends a simulation request to the real-time digital simulation system through the bus interface module and the uplink communication module in the communication module, and receives the simulation result. The microgrid controller has the advantages that the on-line real-time digital simulation system can be supported, microgrid variable parameters can be protected and controlled, and the protection and control performance of the microgrid controller for the microgrid can be improved.

Description

technical field [0001] The invention relates to a microgrid controller in the field of power transmission and distribution. Background technique [0002] Micro-grid refers to a self-made micro-grid system that can realize self-control, protection and management. The emergence of microgrid stems from the development of distributed new energy sources such as photovoltaics and wind power and the demand for efficient energy utilization. The distributed power sources that make up the microgrid are diverse and intermittent. Weak, the power flow and short-circuit current in different states vary greatly. [0003] The above-mentioned characteristics of the microgrid put forward higher requirements for its control and protection. like figure 1 As shown, the current microgrid controller is generally an independent system, including a central processing unit 1 , a communication module 2 and a single-board computer relay protection module 3 . The communication module 2 includes a bu...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02J3/38H02J13/00
CPCY02E40/72Y04S10/12Y02E40/70
Inventor 缪勇奚玲玲何能王福禄赵文杰吴洁邹文斌朱立刚
Owner SHANGHAI ELECTRICGROUP CORP
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