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Universal controller for flexible AC transmission equipment

A flexible AC transmission and controller technology, applied in circuit devices, AC network circuits, electrical components, etc., can solve the problems of sampling speed restriction, large control system volume, etc., to achieve compact structure, simple engineering design, communication and data. Swap convenient effects

Inactive Publication Date: 2003-09-03
STATE GRID HENAN ELECTRIC POWER +1
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AI Technical Summary

Problems solved by technology

The control system based on industrial computer is relatively bulky, and the speed of communication and control and sampling is still restricted

Method used

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  • Universal controller for flexible AC transmission equipment
  • Universal controller for flexible AC transmission equipment
  • Universal controller for flexible AC transmission equipment

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0021] A / D Converter:

[0022] Taking into account the general FACTS device's high requirements for input signal sampling speed and signal simultaneity, and taking into account the requirements for the number of signal channels. The present invention adopts a high-speed parallel 12-bit A / D chip, and the single-channel A / D conversion time is 1.6 microseconds, with a total of 16 channels, and 16 channels can be sampled at the same time. The block diagram is as follows figure 2 As shown, the specific circuit is as image 3 , 4 , 5 shown.

[0023] Figure 4 , Figure 5 is the pre-stage of the 16-way A / D converter signal input. The follower composed of LM324 is used to isolate the input signal and has a protective effect. Because the AD684 sample-and-hold chip behind is more expensive, add this stage It can protect AD684. image 3 It is a sample hold and A / D conversion circuit. The holding signal of AD684 is provided by the output ADHOLD of U28 (74273) among the present inven...

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Abstract

A universal controller for flexible AC transmission equipment is composed of the 16-channel sampling holder and 16-channel A / D converter for sampling input analog signals and converting them to digital signals, DSP control algorithm processor for processing converted data and giving out control pulse angle, dual-port RAM for storing digital signals and providing them to DSP pulse generator, and DSP pulse generator for converting the pulse angle to pulses. It can be used for static reactive compensator, controllable serial capacitor compensator and new-type static reactive compensator.

Description

technical field [0001] The invention relates to a general controller for a flexible AC power transmission device, which belongs to the technical field of power system control. Background technique [0002] The current power system controller is generally composed of a single-chip computer or an industrial computer, that is, the so-called all-digital microcomputer controller. The processing speed of the controller composed of single-chip microcomputer is slow, and the control algorithm can only be based on PI control method or general linear optimal control method, which is difficult to realize for complex algorithms. The controller based on the industrial computer adopts discrete function cards, and each function of the controller is realized with a corresponding card. In fact, it is a control system composed of multiple single-chip microcomputers. For flexible alternating current transmission (hereinafter referred to as FACTS) devices, in addition to the general functions...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00H02J3/18
CPCY02E40/30
Inventor 姜齐荣罗承廉王仲鸿朱庆翔林烽许沛丰
Owner STATE GRID HENAN ELECTRIC POWER
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