DISTRIBUTION SYSTEM MONITORING NECESSITY WITH

HIGH RES PENETRATION

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Outline of the Presentation: Overview

• Potential Challenges of Renewable Integration

• Literature review

Distribution system monitoring necessity Will be raised by RES penetration

Conclusion

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Siting

Frequency Control

Protection

Voltage Regulation

Variable Generation & Intermittency

Power Market Power Quality

Potential Challenges of Renewable Integration

Different Grid Code

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RESEARCH PROBLEM

The system voltage must be kept constant; the main reason is that all the system devices insulation level are designed for a nominal voltage, and voltage violation may be harmful and damage insulation

RES integration , Power Flow and Voltage Regulation

T. Ehara, "Overcoming PV grid issues in urban areas," International Energy Agency, Photovoltaic Power Systems Program, Rep. IEA-PVPS T10-06-2009, 2009.

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Proposed Methods

Reverse power flow

Active power curtailment Usage the storage and electric vehicle Demand side management (HPWH) Using FACTS devices (SVC, D-STATCOM, D-SMES)

Voltage control

Increasing the conductor size Reducing the setting of OLTC Operation at leading power factor

Coordination of conventional voltage regulator (OLTC, SVR, capacitor bank) with FACTS

Summary of proposed methods for mitigating the reverse power flow and voltage control in presence of RES

Literature Review

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Distribution system monitoring necessity Will be raised by RES penetration

1. Distribution systems have been designed for radial and unidirectional power flow.

7/22 Schematic of the IEEE 8500 Node Test Feeder

Distribution system monitoring necessity Will be raised by RES penetration

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Distribution system monitoring necessity Will be raised by RES penetration

1. Distribution systems have been designed for radial and unidirectional power flow.

IEEE 8500 node test feeder power flow direction for PL=100%. The red colors shows the reversed power flow part of feeder.

The PV units’ location are shown by Orange stars

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Distribution system monitoring necessity Will be raised by RES penetration

1. Distribution systems have been designed for radial and unidirectional power flow.

IEEE 8500 node test feeder power flow direction for PL=100%. The red colors shows the reversed power flow part of feeder.

The PV units’ location are shown by Orange stars

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2. The minimum voltage drop which must be kept within standard limits, was the main concern of distribution system planner for a long time.

Distribution system monitoring necessity Will be raised by RES penetration

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2. The minimum voltage drop which must be kept within standard limits, was the main concern of distribution system planner for a long time.

Distribution system monitoring necessity Will be raised by RES penetration

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2. The minimum voltage drop which must be kept within standard limits, was the main concern of distribution system planner for a long time.

Distribution system monitoring necessity Will be raised by RES penetration

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Distribution system monitoring necessity Will be raised by RES penetration

3. Distributed RES integration with intermittent characteristic, increases the vulnerability of small wire size feeder to overload conditions. Due to changing the switch patterns, the distribution network configuration is a dynamic variable.

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Distribution system monitoring necessity Will be raised by RES penetration

4. Distributed ONE-PHASE RES integration with intermittent characteristic, increases the UNBLANCED LOADING of the system

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Distribution system monitoring necessity Will be raised by RES penetration

4. Distributed ONE-PHASE RES integration with intermittent characteristic, increases the UNBLANCED LOADING of the system

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Distribution system and RES integration

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Distribution system and RES integration

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Micro Grid

Distribution system and RES integration

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MicroGrid

Renewable Integration Area

Renewable Integration Area

Distribution system and RES integration

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MicroGrid

Renewable Integration Area

Conclusion

Distribution system with RES integration needs monitoring!

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Distance relay

PMU

SEL-351 O/C with load encroachment

Our Solution: Impedance Based Wide Area

Distribution Network Monitoring