Thyristor Controlled Phase Shifter Placement for Voltage Stability
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Solution Overview
Problem
The challenge is to determine the optimal installation position of a thyristor controlled phase shifter in a power grid to enhance voltage stability, as existing methods are costly and lack precision in flow control across different grid positions.
Innovation Solution
A method involving calculating voltage stability indexes of load nodes before and after the thyristor controlled phase shifter installation, using a formula Lj=|Sj+•Y*jj*Vj^2|, and traversing nodes in descending order to identify positions where the phase shifter can improve voltage stability by reducing the system's overall voltage stability index.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a thyristor controlled phase shifter is installed in a power grid, then voltage stability is improved, but the cost increases and the device complexity increases
Solution Approach 1:
The patent calculates voltage stability indexes of all load nodes before installation and sorts them in descending order. This preliminary analysis identifies the optimal installation position in advance, avoiding trial-and-error installation and reducing overall device complexity by ensuring the first installation position is optimal.
Solution Approach 2:
The system uses automated calculation of voltage stability indexes and automatic identification of optimal installation positions through computer algorithms. This self-service approach replaces manual analysis and decision-making, reducing the need for complex human expertise and simplifying the overall process.
2Measurement precision
If voltage stability indexes are calculated for all load nodes to determine optimal installation position, then measurement precision is improved, but the loss of time increases
Solution Approach 1:
The patent calculates voltage stability indexes for all load nodes as a preliminary step before installation. Although this requires initial computation time, it establishes precise measurements in advance that guide subsequent installation decisions, preventing the need for repeated calculations and measurements after installation.
Solution Approach 2:
Instead of installing the phase shifter first and then measuring voltage stability at different positions, the patent inverts the approach by calculating voltage stability indexes for all nodes first, identifying the optimal position in advance, and then installing the device at that predetermined location. This inversion eliminates the need for iterative installation and measurement cycles.
Data Source
AI summary
Disclosed are a method and system for determining the installation position of a thyristor controlled phase shifter, a medium and a computing device. The installation position of a thyristor controlled phase shifter can be determined according to the variation of the voltage stability index of a power system before and after the thyristor controlled phase shifter is installed, thus providing technical support for the selection of the installation position of the thyristor controlled phase shifter in a power grid.