Multi-module Power Quality Control Apparatus for Harmonic Mitigation

Solution Overview

Problem

Single-core based control apparatuses for active power quality devices require high-performance processing units, leading to increased manufacturing costs and computational burdens, which are not efficiently addressing harmonic and reactive power pollution in power grids.

Innovation Solution

A control apparatus with a power quality analysis module and multiple tracking control modules operating on synchronized signals with constant phase shifts, reducing the burden on individual processing units and lowering performance requirements, while outputting PWM control signals to manage power quality devices effectively.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a single processing unit is used to control power switching devices, then the degree of integration is high, but the computing speed requirement and manufacturing cost increase

Engineering Contradiction:

Improvedegree of integrationVSAvoidcomputing speed requirement

Core Design Contradiction:

Device complexityVSPower

Solution Approach 1:

The control apparatus is divided into multiple processing units (first processing unit, second processing unit, etc.) that work in parallel. Each processing unit handles a portion of the control signals for power switching devices, segmenting the computational load and reducing the computing speed requirement for each individual unit while maintaining high integration through coordinated operation.

Inventive Principle:

Principle #1Segmentation

2Device complexity

If a single processing unit is used to control power switching devices, then the degree of integration is high, but the manufacturing cost increases

Engineering Contradiction:

Improvedegree of integrationVSAvoidmanufacturing cost

Core Design Contradiction:

Device complexityVSEase of manufacture

Solution Approach 1:

The control apparatus is divided into multiple processing units (first processing unit, second processing unit, etc.) that work in parallel. Each processing unit handles a portion of the control signals for power switching devices, segmenting the computational load and reducing the computing speed requirement for each individual unit while maintaining high integration through coordinated operation.

Inventive Principle:

Principle #1Segmentation

3Productivity

If computational load is concentrated in one processing unit, then integration is high, but the performance requirements and cost are higher

Engineering Contradiction:

Improvecomputational efficiencyVSAvoidperformance requirement

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The control apparatus is divided into multiple processing units (first processing unit, second processing unit, etc.) that work in parallel. Each processing unit handles a portion of the control signals for power switching devices, segmenting the computational load and reducing the computing speed requirement for each individual unit while maintaining high integration through coordinated operation.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS9001535B2Power quality device and its control apparatus

Publication Date: 2015.04.07 DELTA ELECTRONICS INC(CN)

AI summary

A control apparatus for a power quality device comprises: a power quality analysis module, for sampling a power supply network to obtain a power quality information, and performing an analysis and computing on the sampling, so as to output an instruction information; N tracking control modules, for receiving respectively the instruction information and tracking the instruction information, so as to output N PWM control signals having a same frequency and constant phase shift therebetween, where N is a positive integer and N≧2, thereby to control the power quality device; wherein the power quality analysis module and the N tracking control modules are operated based on a synchronized signal.