Per-Phase Power Regulation for Unbalanced Three-Phase Networks
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Solution Overview
Problem
Current three-phase dSTATCOM devices in electrical power transmission networks are limited to balanced-phased operation, restricting their efficacy, performance, and functionality.
Innovation Solution
An electrical power regulating apparatus with DC and AC connectors, switches, filters, and electronic controlling devices that allow independent regulation of power on each phase, enabling operation in unbalanced modes and supporting three-phase, two-phase, and single-phase systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If dSTATCOM devices operate in balanced-phased mode, then the device structure and control system are simplified, but the efficacy, performance and functionality are restricted
Solution Approach 1:
The patent divides the three-phase power regulation system into independent per-phase control units. Each phase has its own switching circuit and control logic, allowing independent regulation of each phase while maintaining a unified overall structure. This segmentation enables unbalanced load handling without requiring complex inter-phase coordination.
Solution Approach 2:
The invention implements dynamic switching capability where each phase can independently connect or disconnect from the DC source based on its specific load conditions. The switches enable real-time adaptation of each phase's operation mode (connected or disconnected) to match varying load requirements, providing dynamic versatility without permanent structural complexity.
2Ease of manufacture
If dSTATCOM devices are designed for balanced-phased operation only, then the design and manufacturing process is simplified, but the adaptability to different operating conditions is limited
Solution Approach 1:
The patent creates a universal power regulation apparatus that can handle multiple operating conditions (balanced and unbalanced loads, single-phase, two-phase, or three-phase operation) through a unified design. The same basic structure with per-phase switches and control circuits serves all operating modes, eliminating the need for separate designs for different scenarios.
Solution Approach 2:
The invention enables parameter changes in each phase independently through the switching mechanism. Each phase can dynamically change its connection state (connected/disconnected) based on load requirements, allowing the system to adapt to varying operating conditions without physical reconfiguration or complex manufacturing variations.
3Adaptability or versatility
If independent per-phase regulation is implemented, then the ability to handle unbalanced loads is improved, but the device complexity increases
Solution Approach 1:
The patent segments the control system into independent per-phase units, where each phase has its own switching element and control logic. This segmentation allows simple independent decision-making for each phase based on its specific load conditions, avoiding the need for complex centralized control algorithms while achieving unbalanced load handling capability.
Data Source
AI summary
The invention relates to an apparatus for regulating electrical power in an electricity transmission network, the apparatus including: a DC contactor; a transmission network connector including live terminal(s) connected to live connection(s) and a neutral terminal connected to a neutral or earth of the electricity transmission network; switches connected to the DC contactor; electronic controlling devices coupled to the switches and control the switches to independently regulate electrical power on each of the live connection(s) and the neutral connection, the electronic controlling devices receive voltage reading of the live connection(s); calculate average of the voltage reading for the live connection(s); if the average is larger than an upper value, control the switches to reduce voltage on the live connection; if the average is less than a lower value, control the switches to increase voltage supplied on the live connection(s).