Oilfield Energy Revolution, Three-in-One PV-Storage-DC-Flexible System - Shanghai Wenlida Power Electronics Co., Ltd.

The "three-in-one PV-storage-DC-flexible system" developed by Shanghai Wenlida Power Electronics Co., Ltd. has demonstrated significant application value in the energy revolution of oilfields. This system integrates three core functions: photovoltaic power generation, energy storage technology, and flexible DC transmission, forming an integrated "PV-storage-DC-flexible" solution that provides key support for oilfields to achieve green energy transformation.

Technical Architecture and Core Advantages

1. Photovoltaic Power Generation Module
   The system adopts high-efficiency photovoltaic modules (such as PERC technology panels with a photoelectric conversion efficiency of 22%) and dynamically optimizes power generation efficiency through an MPPT (Maximum Power Point Tracking) controller. In oilfield scenarios, photovoltaic modules can be flexibly deployed on wellsite fences, idle land, or building rooftops. For example, the Ying 13-Xie 152 wellsite of Dongxin Oil Production Plant in Shengli Oilfield uses photovoltaic fences for power generation, achieving a green electricity replacement rate of 75%.
2. Energy Storage System Integration
   The energy storage part mainly uses lithium-ion batteries (such as lithium iron phosphate), which can support continuous power supply for 10 hours after a single charge and has millisecond-level emergency response capability (switching to off-grid mode within 20ms when the power grid fails). The "PV-storage-DC-flexible" project in Shengli Oilfield stores surplus electricity through electrochemical energy storage devices, realizing "self-generation and self-use, surplus electricity storage" and turning the wellsite into a micro "virtual power plant", with the electricity consumption per ton of liquid reduced by 0.51 kWh.
3. Flexible DC Transmission and Intelligent Regulation
   The system adopts DC bus power distribution technology to reduce AC-DC conversion losses, with a comprehensive energy efficiency of over 90%. Through the intelligent energy management system (EMS), it real-time monitors the status of power generation, electricity consumption, and batteries, dynamically adjusts energy flow (such as prioritizing self-use, surplus electricity grid connection, or storage), and supports linkage optimization with oilfield equipment (such as pumping units and water injection pumps). For example, when photovoltaic power is sufficient, it automatically switches to "high-efficiency mode" to increase production, and switches to "economic mode" during peak electricity prices to reduce costs.

Innovative Applications in Oilfield Scenarios

1. Off-Grid Energy Self-Sufficiency
   To address the problem of no power grid coverage in remote oilfield wellsites, the system can operate independently. For example, the Yuebei 1 well in Qinghai Oilfield adopts the "photovoltaic + energy storage + DC bus microgrid" mode, realizing all-weather green power supply and reducing carbon emissions by 197.4 tons per year. Dongxin Oil Production Plant in Shengli Oilfield has achieved a green electricity replacement rate of over 70% in wellsites through the multi-energy complementary mode of "wind, light, heat, storage + multi-source microgrid", generating 12 million kWh of green electricity annually.
2. Grid Coordination and Flexible Regulation
   The system can serve as a "flexible load" of the power grid, adjusting power consumption according to the supply-demand relationship of the grid. For example, through demand response technology, oilfield equipment (such as central air conditioners and charging piles) can automatically adjust their electricity load, cooperating with energy storage systems to suppress grid impacts. The "PV-storage-DC-flexible" system in Dongxin Oil Production Plant dynamically balances the power distribution among photovoltaic, energy storage, and the grid by real-time monitoring of DC bus voltage, ensuring power supply stability.
3. Improvement of Comprehensive Energy Efficiency
   The system adopts DC coupling design to reduce conversion losses and supports multi-energy input (such as wind power and diesel generators) to achieve zero energy waste. Through the integrated management of "source-grid-load-storage", Shengli Oilfield has saved a total of 34.8588 million kWh of electricity, with the comprehensive utilization rate of industrial solid waste reaching over 96%.

Industry Value and Future Trends

1. Policy and Market Drivers
   The national "Action Plan for Accelerating the Integrated Development of Oil and Gas Exploration and Development with New Energy (2023-2025)" clearly supports the integrated development of oil and gas fields with new energy. Wenlida's technical solution is in line with policy orientations; for example, the "PV-storage-DC-flexible" project in Shengli Oilfield has been included in the national wind-solar base plan.
2. Technology Iteration Direction
   In the future, the PV-storage-DC-flexible system will develop towards higher integration, such as integrating hydrogen production and carbon capture technologies to form a "wind-solar-thermal-gas-hydrogen-storage integration" model. Meanwhile, AI algorithms (such as LSTM load forecasting) and 3D visual monitoring will further optimize the system's operational efficiency.
3. Market Competition Pattern
   Wenlida needs to continue breaking through in technological differentiation. For example, Suzhou Jingkong Energy has launched an integrated PV-storage-DC-flexible power supply system, emphasizing "reliable power supply and adjustable control". Wenlida can rely on its accumulation in the power electronics field (such as DC charging pile technology) to strengthen the safety and long-life design of energy storage systems.

Summary