μPMU-Based Feeder Modeling for Local Voltage and Reactive Power Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The management of electrical distribution systems is challenged by the integration of intermittent generation sources like solar and wind, leading to voltage variations and reduced power quality, as existing methods require costly direct measurements and slow, costly control strategies.
Innovation Solution
A system using micro phasor measurement units (μPMUs) at substations and customer sites to measure and control electricity parameters without direct connection to feeder lines, determining voltage drop impedance and calculating electricity parameters like real and reactive power flow, allowing for localized control of power delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If direct measurement sensors are connected to distribution feeder lines, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent introduces μPMUs as intermediary measurement devices that are not directly connected to high-voltage distribution feeder lines. Instead, they measure electrical parameters through transformers and other isolation equipment, serving as mediators between the measurement system and the power system. This approach maintains measurement precision while reducing device complexity and safety risks associated with direct connection to high-voltage lines.
2Reliability
If control strategies are implemented to manage voltage variations, then power quality is improved, but response time and cost increase
Solution Approach 1:
The patent implements a feedback control mechanism where μPMUs continuously measure electrical parameters (voltage, current, power) and transmit this data to a control system. The control system processes the measurements and generates control signals to adjust transformer taps or other control devices, thereby managing voltage variations. This closed-loop feedback approach improves power quality by responding to actual system conditions while optimizing response time through automated real-time control.
Data Source
AI summary
A system and a method for locally controlling delivery of electrical power along the distribution feeder by measuring certain electricity parameters of a distribution feeder line using a substation phasor measurement unit (PMU) electrically coupled to a substation distribution bus at a first node on the feeder line, and at least one customer site PMU electrically coupled to a low voltage end of a transformer at a customer site, wherein the transformer is coupled by a drop line to a second node on the distribution feeder line and the customer site is coupled by another drop line to the transformer, and by controlling at least one controllable reactive power resource and optionally a real power resource connected to the second node or at the customer site. Related apparatus, systems, articles, and techniques are also described.