Voltage Control Apparatus Using Segmented Switching for Power Distribution
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Solution Overview
Problem
Existing voltage control systems in power distribution networks struggle to optimize voltage levels across entire distribution lines, particularly when dealing with variations caused by distributed power sources and electric vehicle charging, as they often rely on expensive line voltage control devices and do not account for circulation currents during switch operations.
Innovation Solution
A voltage control apparatus and method that determines and switches optimal switches on a power distribution line to minimize voltage optimization values, considering circulation currents and applying target coefficients to normalize voltage distribution values, while also utilizing tap switching devices to further optimize voltage levels when loads are applied.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a line voltage control device is installed in the middle of a power distribution line to solve voltage problems, then voltage control capability is improved, but device cost increases significantly
Solution Approach 1:
The power distribution line is divided into multiple sections with switches placed at strategic locations. Instead of using a single expensive line voltage control device, the system segments the line and uses multiple ordinary switches to achieve distributed voltage control across different sections, thereby reducing overall device cost while maintaining voltage control capability.
Solution Approach 2:
The control server acts as an intermediary that coordinates switch operations across the distributed network. It calculates optimal switching strategies and controls multiple ordinary switches to achieve voltage control effects previously requiring expensive dedicated line voltage control devices, thus reducing hardware costs while maintaining control effectiveness.
2Reliability
If switches are operated to optimize voltage distribution, then voltage optimization is improved, but circulation current problems worsen
Solution Approach 1:
The control server performs preliminary calculations to predict circulation currents before executing switch operations. By anticipating the harmful effects of switch operations, the system can select switching strategies that optimize voltage while avoiding or minimizing circulation current generation, thus preventing rather than reacting to the harmful effect.
Solution Approach 2:
The system continuously monitors actual voltage distribution and circulation current levels after switch operations. This feedback information is used to refine switching strategies and adjust operations to minimize circulation current while maintaining voltage optimization, creating a closed-loop control system that learns from and adapts to the effects of its actions.
Data Source
AI summary
The present invention relates to an apparatus and method for performing adjustment to optimize the voltage for each distribution network in a power distribution system. The apparatus for adjusting a voltage in the power distribution system adjusts the voltage by switching a switch that lies on a path in the power distribution system. The apparatus determines a switch that is to become a switching target from among switches lying on the path, obtains a voltage optimization value of the determined switching target switch, selects a switch having the minimum voltage optimization value by changing the switching target switch to another switch in order to obtain the voltage optimization value, and adjusts the voltage through switching of the selected switch.