This document outlines a new control strategy for distributed static compensators (DSTATCOMs) that regulates reactive power (VAR) flow at a transmission point. The control strategy uses a slow reset regulator to gradually adjust the DSTATCOM's VAR setpoint to maintain output within limits while keeping sufficient VAR reserve for dynamic events. It also presents an algorithm to calculate constraints for the regulator based on allowable VAR thresholds for the transmission flow. Modeling shows the new control and algorithm function properly as intended to optimize DSTATCOM operation.

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2. DOCUMENT FORMAT
• Abstract:
• Introduction:
• Literature Survey:
• System Analysis:
• Existing System:
• Disadvantages:
• Proposed System:
• Advantages:
• System Requirements:
• Block Diagram:
• Working Flow Diagram:
• Circuit Diagram:
• Implementation:
• Modules Description:
• System Study:
• System Testing:
• Software Description:
• Sample code:
• Conclusion:
• Future Enhancement:
• References:
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3. A NEW CONTROL STRATEGY FOR DISTRIBUTED
STATIC COMPENSATORS CONSIDERING
TRANSMISSION REACTIVE FLOW CONSTRAINTS
TITLE
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4. ABSTRACT
This paper presents a new control strategy for a distributed static compensator (also
known as distributed STATCOM or DSTATCOM), configured to regulate the reactive (VAr) flow at a
point in a transmission system. This new control strategy takes into account the operating VAr limits
of that reactive flow in determining the steady-state output of the DSTATCOM. The new control
strategy applies a slow reset regulator (SRR) to slowly bias the VAr set point of the DSTATCOM master
controller to maintain its steady-state output within a target bandwidth.
The operating result maintains an appropriate VAr reserve level from the DSTATCOM for
dynamic events in the system. This paper also presents a new algorithm to calculate the operating
constraints of the SRR that reflect the VAr flow at the local or remote point in the transmission
system and the allowable VAr thresholds for that flow.
These allowable thresholds can be utilized to the full extent to lower the steady-state
output of the DSTATCOM, maximize its VAr reserve for dynamic events and reduce equipment and
associated system operating losses. Modeling, implementation, and simulation of an engineering
project show that the new control strategy and algorithm are functioning properly as expected.
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