אוקטובר 2014. סוגי אירועים של איכות חשמל Power Quality Event Types.

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Presentation transcript:

אוקטובר 2014

סוגי אירועים של איכות חשמל Power Quality Event Types

הגדרת משך ועומק האירוע Duration and Value of Event V RMS Time V NOMINAL 110%×V N 90%×V N Duration Value 5%×V N Swell Sag Interruption

סיווג אירועים לפי תקן EN50160:2010 Event Classification

הצגת אירועים וספים לפי התקנים CBEMA/ITIC, SEMI F-47 and others: Event and Levels Plot Duration (seconds) Sag/Swell Chart

RS232/422/485, Profibus, TCP/IP, Dialup modem, GPRS, RF, USB Modbus RTU, ASCII, DNP3.0, Modbus/TCP, DNP3/TCP, Profibus, IEC 61850, IEC Multi-Tenant Submetering Power Measurement Energy Efficiency & Cost Allocation Energy Management & Billing Asset Management LAN ExpertPower™ Server (Pro Edition) Substation Automation Power Quality Analysis Fault Recording Revenue Metering Smart Grid & Demand Response Internet ExpertPower™ Server (Service Edition)

PM130, PM135 and EM133  Multifunctional 3-Phase Smart Meter –More than 120 monitored parameters –One cycle calculation  Billing/TOU Revenue Energy Meter –Class 0.5S precision  Harmonic Analyzer –THD, TDD, up to 40 th harmonics (incl. angles)  Real-time Waveform Capture –128 samples/cycle  Programmable Logic Controller -16 control set points, thresholds and delays -Standard 2DI/1DO (EM133), Optional 4DI/2DO, 12DI/4DO or 4 AO  Event and Data Recording –Min/Max log with time stamp –Over 90 days history storage  Real Time Clock  Built-in RS-485 port plus optional RS-485/422/232, Ethernet, Profibus, RF or GPRS communication

מחזור החישוב Measurement Period

הגדרת אירועים ב - PAS PAS Setpoint Setup ≥120% ≥110% End of Swell ≤5% ≤40% ≤50% ≤70% ≤80% ≤90% End of Sag/Interruption -

הגדרת שמירת נתונים ב - PAS PAS Datalog Setup

תרשים בדיקה Test Scheme Volts, Currents OMICRON CMC 256 Volts, Currents PM135 מכשיר נבדק UUT PM180 Control מכשיר בקרה PAS Data Setup Data Setup

Test Voltage מתח בדיקה

ייבוא הנתונים באקסל Data Import to Excel

ניתוח הנתונים באקסל Data Analysis

EN 50160:2010

גרף אירועים Sag/Swell Chart Duration (seconds)

השוואת אירועים Event Comparison מסקנות : 1. כל האירועים זוהו 2. אי דיוקים קלים בזמן ועומק האירועים ( צפוי ) 3. סיווג אירועים מדויק ( ע " פ התקנים השונים ) Conclusions: 1.All events were detected 2.Small duration and values inaccuracies (expected) 3.Correct event classifications (according to various standards)

פרמטרים נוספים אפשריים Additional PQ Parameters

המגבלות Limitations המגבלות הטכנולוגיות :  מדידה כל מחזור  רישום נתונים בעת מעבר הסף בלבד המשמעות היישומיות :  דיוק מדידת משך האירוע ( בעיקר לצרכי סטטיסטיקה )  דיוק מדידת הערך ( מסייע בניתוח מקור האירוע )  אי איתור אירועים קצרים ( לרבות באורך מחזור ) Limitations of the Technology:  One cycle measurement  Data logging on threshold crossing only Implications:  Duration Measurement Accuracy (mainly for statistics)  Value Measurement Accuracy (used for event source analysis)  Missing Short Events (including single cycle events)

השוואת מכשירים Device Comparison

Case Study  GlobalFoundaries, the second largest foundry in the world  All four fabs in Singapore use approx EM133, PM130 and PM135 to monitor energy efficiency and voltage dips

Typical Use of the Integral PLC Logic Fault Warning Efficiency Phase drop; phase unbalance Phase sequence error Overload protection; Load Shedding Temporary Over Voltage Voltage Sags High Current Harmonics Low Frequency High Frequency High Voltage Harmonics Reverse Power flow Protection Hi Average Voltage Low Power Factor Alarm Unbalance inefficiency High Neutral Current (safety, efficiency) Value Threshold Time Delays94 Selectable Parameters 20 Selectable Actions

סיכום Summary  ניתן לאתר בעיות של איכות חשמל ע " י שימוש במכשירי מדידה בלבד, בתנאי שהם כוללים מערכת ספים מהירה ומקיפה  השיטה מאפשרת יישום רחב לעומסים בודדים ולוחות משנה  בלוחות ראשיים, לוחות משנה חשובים ואתרים רגישים – יש להתקין נתחי איכות חשמל  It is possible to detect power quality issues using power meters only, providing they have fast and large set point capabilities  The method allows wide implementation for single loads and secondary MCCs  In primary MCCs, important secondary MCCs and sensitive sites – a Power Quality Analyzer is required

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