TSC (thyristor switched capacitor) system and RS485 communication method thereof based on FPGA (Field Programmable Gate Array)

Abstract

The invention discloses a TSC system and an RS485 communication method thereof based on an FPGA. The aim of dynamic reactive power compensation is achieved through connection and disconnection between an antiparallel thyristor switched capacitor TSC and a power grid; the capacity of the TSC system is divided into switching units with a plurality of capacity levels; the TSC is used for sending a control command by adopting a DSP (Digital Signal Processor) and transmitting the control command to the switching units connected in parallel through a 485 bus, wherein each switching unit comprises a switching module, an FPGA chip, an optical coupler, an RS485 chip and an interface of the RS485 chip; each FPGA chip is used for receiving and fetching the control command by use of an asynchronous communication serial logic circuit as well as controlling and monitoring the switching module according to the control command. Through the way, the TSC system and the RS485 communication method thereof based on the FPGA can be used for detecting and monitoring the switching units in the TSC by adopting FPGA and RS485 communication technologies and also are helpful to increase the precision of the dynamic reactive power compensation.

Description

technical field [0001] The invention relates to the field of RS485 communication technology and dynamic reactive power compensation, in particular to a TSC system and an FPGA-based RS485 communication method thereof. Background technique [0002] Thyristor switched capacitor (TSC) is a dynamic reactive power compensation device. In general, thyristor switched capacitors use high and low level output on their controllers to control the input and removal of switching modules, although this method can be very good The purpose of dynamically compensating reactive power for the power grid, but it cannot detect the operating status of the switching unit and monitor the switching module, which brings inconvenience and unpredictability to the dynamic reactive power compensation of the power grid. [0003] In addition, because the 485 interface can connect multiple transceivers on the bus, and the use of FPGA and optocoupler can realize the one-way control of the switching unit, so a...

AI Technical Summary

Problems solved by technology

[0002] Thyristor switched capacitor (TSC) is a dynamic reactive power compensation device. In general, thyristor switched capacitors use high and low level output on their controllers to control the input and removal of switching modules, although this method can be very good The purpose of dynamically compensating reactive power for the power grid, but it cannot detect the operating status of the switching unit and monitor the switching module, which causes inconvenience and unpredictability to the dynamic reactive power compensation of the power grid.

[0003] In addition, because the 485 interface can connect multiple transceivers on the bus, and the use of FPGA and optocoupler can realize the one-way control of the switching unit, so a single control chip can perform 485 with multiple parallel FPGA chips through 485 communication technology. Bus connection communication, a single control finally implements one-way control and monitoring of switching units through FPGA, but this method has not been researched and promoted so far

Images