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Chain type STATCOM control system based on EtherCA technology

A control system and chain technology, applied in the field of power system, can solve the problems of many connection cables, increased cost, and reduced reliability, and achieve the effect of reducing cost, reducing the number of cables and facilitating expansion.

Active Publication Date: 2015-06-10
CHINA EPRI SCIENCE & TECHNOLOGY CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the control structure of DSP+FPGA (Field Programmable Gate Array) is generally used to realize the input and output of multi-channel signals, but when the number of power units is large, there are many connecting cables between the control system and the power part of the converter, and the cost increased, decreased reliability

Method used

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  • Chain type STATCOM control system based on EtherCA technology
  • Chain type STATCOM control system based on EtherCA technology
  • Chain type STATCOM control system based on EtherCA technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] EtherCAT communication management unit, including the first EtherCAT communication management unit and EtherCAT communication management unit, its structure diagram is as attached figure 2 As shown, by expanding the DSP to two W3150A+, two 100M Ethernets can be realized. One of them is the master station of EtherCAT, and the other is the network port directly connected to the output of the last slave station, which constitutes the ring network redundancy of EtherCAT; one of the ET1100 converts the physical interface of Ethernet to LVDS and directly connects to the chassis The LVDS signal line on the back panel; through the CPLD expansion part of the IO port, it can be used to realize the synchronous communication when multi-master stations, the access of the second pulse signal, or the signal from the AD slave station to start the master station to send data, etc.; Accept B code time calibration signal; RS232 / CAN interface is spare.

Embodiment 2

[0053] The CPU control unit can be used for project control and protection, or wave recording. For different projects, one or several units can be used. The structure diagram of the CPU control unit is attached image 3 shown. Among them, the DSP TMS320C6713 exchanges data with other slave stations through the EtherCAT (LVDS interface slave station module, such as receiving collected data, receiving return information from the processing unit, sending processed data and sending control commands, etc., and then the received data The main function of TMS320F28335 is to receive the data and control and protection information processed by TMS320C6713 through DPRAM, to do simple processing on the received information, to send out PWM pulses, and to send out control and protection commands; NM7010B+Ethernet module is used Used to communicate with the host computer, upload SOE information, receive fixed value information, etc.; TMS320F28335 exchanges data with another EtherCAT netwo...

Embodiment 3

[0055] The structure diagram of the data acquisition unit is attached Figure 4 shown. There are 12 channels of 14-bit AD sampling, which can be used as voltage sampling channels or current sampling channels. The function of PT and CT is to respectively transmit the voltage and current signals twice, and then the signal conditioning circuit performs secondary conditioning on the above-mentioned voltage and current signals, and transmits them to the AD sampling chip for CPLD processing. The processing results can be passed through the back Board IO port or LVDS bus for transmission.

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Abstract

The invention provides a chain type STATCOM (Static Synchronous Compensator) control system based on EtherCA technology, wherein the chain type STATCOM control system uses real-time industrial Ethernet EtherCA as a channel of data transferring, and the control system uses a layered distribution topology structure. The layered distribution topology structure of the STATCOM control system comprises a main control layer, a phase control layer and a unit control layer. The main control layer comprises a main control case and the like functional cases, the phase control layer is composed of a phase coupler case, and the unit control unit is composed of a unit controller. The communication between the main case and the phase coupler case is carried out by means of firewire connected EtherCA. The chain type STATCOM control system based on EtherCA technology provided by the invention has the advantages that the data transferring speed is high, the number of the cable is less, the exchange speed is fast, the expansion is convenient, the accurate synchronism and the diagnosis ability are strong and the configuration is flexible.

Description

technical field [0001] The invention belongs to the technical field of power systems, and in particular relates to a chained STATCOM control system based on EtherCAT technology. Background technique [0002] With the rapid development of the power industry, the use of power electronics technology to adjust and control the main parameters of the power system to improve the controllability, effectiveness and reliability of the power system is the "AC flexible transmission system", that is, the flexible AC transmission system. (Flexible AC Transmission Systems, FACTS) technology has been widely concerned, researched and applied. [0003] Static Synchronous Compensator (STATCOM) based on voltage source inverter is a brand-new FACTS technology based on fully controlled devices. Compared with the traditional thyristor-controlled static var compensation device SVC, it has the following advantages: The adjustment speed of STATCOM is faster and the operating range is wider, which ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/18H02J13/00
CPCY02B90/20Y02E40/10Y02P90/02Y04S20/00Y04S40/124
Inventor 孙丽敬蒋晓春冶铁蔡林海赵小英赵瑞斌王清涛王轩郑青青昃萌邹俭俞旭峰
Owner CHINA EPRI SCIENCE & TECHNOLOGY CO LTD
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