Electric Drive Fracturing Power Supply Semi-Trailer with Shared Transformer
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Solution Overview
Problem
Conventional fracturing equipment in oil and gas fields faces issues with large size, high weight, environmental pollution, and cost inefficiency due to diesel engine-driven systems, and existing electric drive technologies are not compact or energy-efficient.
Innovation Solution
An electric drive fracturing power supply semi-trailer with a high-power multiwinding transformer, integrated high voltage switch, and rectifying units, using a common DC bus to drive multiple inversion units, resulting in a compact, energy-efficient, and environmentally friendly solution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple transformers and rectifying units are allocated for multiple inversion units, then each unit can operate independently, but equipment gathering on-site increases and large areas are occupied
Solution Approach 1:
The patent merges multiple transformers into a single shared transformer that serves all inversion units. The transformer primary side receives high voltage power, and the secondary side provides power to multiple rectifying units through a common DC bus, eliminating the need for separate transformers at each location and significantly reducing on-site equipment gathering and occupied area.
Solution Approach 2:
The single transformer is designed with multi-functionality to serve multiple inversion units simultaneously. It acts as a universal power source that can supply power to any combination of rectifying units and inversion units as needed, providing both consolidation benefits and operational flexibility.
2Power
If diesel engine and transmission are used to drive fracturing plunger pump, then power transmission is achieved, but large volume is occupied and heavy weight is involved
Solution Approach 1:
The patent replaces the mechanical diesel engine-transmission system with an electrical drive system. Instead of using a diesel engine connected to a transmission to drive the fracturing plunger pump, the system uses a transformer-rectifying unit-inversion unit configuration to provide electrical power to drive the pump motor, eliminating the need for heavy mechanical power transmission components.
3Power
If diesel engine driven equipment is used, then power supply is provided, but engine waste gas pollution and noise pollution are generated
Solution Approach 1:
The patent substitutes the diesel engine with an electrical power system consisting of transformer, rectifying units, and inversion units. This replacement eliminates combustion processes entirely, removing the sources of waste gas emissions and noise pollution while maintaining the power supply capability needed for fracturing operations.
4Productivity
If conventional diesel engine driven system is used, then fracturing operation is enabled, but high initial purchase costs and high fuel consumption costs are incurred
Solution Approach 1:
The patent replaces the diesel engine system with an electrical drive system that consumes electricity instead of diesel fuel. This substitution eliminates ongoing fuel consumption costs and reduces initial purchase costs by removing the need for expensive diesel engines and transmission systems, while maintaining full fracturing operation capability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution significantly reduces equipment volume, energy consumption, and capital investment while providing high output power, addressing the limitations of conventional systems and enhancing operational efficiency and environmental sustainability.
Implementation Method 1
a transformer (3), a rectifying unit (4) and inversion units (5). The high voltage switch (2), the transformer (3) and the rectifying unit (4) are integrated on the power supply semi-trailer body (1)... The high voltage side of the transformer (3) is connected to the high voltage rectifying unit (41), the low voltage side of the transformer (3) is connected to the low voltage rectifying unit (42)
Data Source
AI summary
The present invention discloses an electric drive fracturing power supply semi-trailer, which can separately drive multiple high voltage inversion units and multiple low voltage inversion unit, through a common DC bus, by employing a high voltage switch, a transformer and two sets of rectifying units. The electric drive fracturing power supply semi-trailer is small in size, compact in layout and economical. The high voltage switch, the transformer, and the rectifying units are shared to decrease the wirings of power supply lines, thus reducing the number of equipment and capital investment, and better meeting the usage requirements.