Gas pipeline protection system with pressure energy and solar energy

Abstract

The utility model provides a kind of pressure energy and solar energy collaborative energy supply's gas pipeline protection system, including the pressure difference power generation constant potential instrument system and solar energy intelligent drainage system being connected with gas pipeline.The pressure difference power generation constant potential instrument system includes pressure difference power generation module, constant potential instrument and anode ground bed;The solar energy intelligent drainage system includes photovoltaic power generation module, intelligent drainage module and drainage ground bed.The gas pipeline protection system of the utility model has the advantages of not depending on external power grid and responding fast to dynamic stray current interference.

Description

Technical Field

[0001] This utility model relates to the field of gas pipelines, specifically a gas pipeline protection system that uses pressure energy and solar energy in synergy. Background Technology

[0002] As a crucial infrastructure for energy transmission, the safe operation of urban gas pipelines is directly related to public safety and the stability of energy supply. Because these pipelines are typically buried underground, they are susceptible to electrochemical corrosion due to soil electrolytes. Furthermore, dynamic stray currents generated by facilities such as subways and electrified railways can severely interfere with the pipelines, accelerating the corrosion process and even leading to perforation and leaks, thus causing safety accidents.

[0003] Currently, gas pipelines mainly employ impressed current cathodic protection and sacrificial anode protection methods. However, traditional impressed current systems rely on mains power, resulting in high costs and low reliability in areas without electricity or in remote locations. On the other hand, existing drainage equipment has a slow response speed to dynamic stray currents, making it difficult to achieve rapid and accurate suppression, leading to large pipeline potential fluctuations and poor protection effectiveness. Utility Model Content

[0004] The purpose of this invention is to provide a gas pipeline protection system that uses pressure energy and solar energy in synergy, aiming to solve the technical bottlenecks of existing cathodic protection technology, such as strong dependence on external power grids and slow response to dynamic stray current interference.

[0005] In this embodiment of the invention, a gas pipeline protection system that utilizes pressure energy and solar energy in synergy is provided. The system includes: a differential pressure power generation potentiostat system and a solar-powered intelligent drainage system, both connected to the gas pipeline. The differential pressure power generation potentiostat system includes a differential pressure power generation module, a potentiostat connected to the differential pressure power generation module and the gas pipeline respectively, and an anode ground bed connected to the potentiostat. The solar-powered intelligent drainage system includes a photovoltaic power generation module, an intelligent drainage module connected to the photovoltaic power generation module, and a drainage ground bed connected to the intelligent drainage module.

[0006] In this embodiment of the invention, the gas pressure differential power generation module adopts a turbine expander or an organic Rankine cycle power generation device.

[0007] In this embodiment of the invention, the differential pressure power generation potentiostat system further includes a power conversion module connected to the gas differential pressure power generation module and a hybrid energy storage module connected to the power conversion module.

[0008] In this embodiment of the invention, the hybrid energy storage module includes a supercapacitor bank and a lithium iron phosphate battery bank.

[0009] In this embodiment of the invention, the intelligent drainage module includes a control unit and an AC / DC separation unit.

[0010] In this embodiment of the invention, the gas pipeline protection system further includes a control platform that maintains communication connections with both the differential pressure generator potentiostat system and the solar-powered intelligent drainage system. Compared with existing technologies, the gas pipeline protection system of this utility model combines pipeline pressure energy power generation with solar photovoltaic power generation to construct a dual renewable energy power supply system. Pressure energy power generation provides a continuous and stable basic energy source, while solar energy serves as a supplement and regulator, fundamentally solving the problems of energy self-sufficiency and sustainability. The constant potential protection and intelligent drainage function are decoupled and then integrated. The constant potential meter driven by the differential pressure power generation system provides the basic protection current for the entire domain, while the intelligent drainage module driven by solar energy precisely focuses on suppressing local interference, achieving the optimal combination of global steady-state control and local transient suppression. Attached Figure Description

[0011] Figure 1 This is a structural schematic diagram of a gas pipeline protection system according to an embodiment of the present invention. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0013] The implementation of this utility model will be described in detail below with reference to specific embodiments.

[0014] like Figure 1 As shown in the embodiment of this utility model, a gas pipeline protection system that uses pressure energy and solar energy in synergy is provided. It includes: a differential pressure power generation potentiostat system 1 and a solar-powered intelligent drainage system 2, both connected to the gas pipeline 4; and a control platform 3 that maintains communicative connections with both the differential pressure power generation potentiostat system 1 and the solar-powered intelligent drainage system 2. These will be described in detail below.

[0015] The differential pressure power generation potentiostat system 1 includes a differential pressure power generation module 11, a potentiostat 12 connected to the differential pressure power generation module 11 and the gas pipeline 4 respectively, and an anode ground bed 13 connected to the potentiostat 12.

[0016] The differential pressure power generation module 11 is embedded in the gas pipeline 4. It generates electricity using the pressure difference in the gas pipeline 4 and supplies power to the potentiostat 12. Depending on the pressure difference at the site, the differential pressure power generation module 11 uses either a turbine expander or an organic Rankine cycle power generation device. When the pressure difference is ≥0.5MPa, an axial flow turbine expander is used, with a mechanical energy conversion efficiency ≥65%; when the pressure difference is between 0.2MPa and 0.5MPa, an organic Rankine cycle power generation device is used to fully utilize low-grade thermal energy.

[0017] The potentiostat 12 is used to collect the potential of the gas pipeline 4 in real time (sampling frequency ≥10Hz) and dynamically adjust the output current of the potentiostat (adjustable range 0~30A) to the anode ground bed 13, controlling the potential of the gas pipeline within the optimal protection range of -1.2V to -0.85V. The anode ground bed 13 is buried in the stratum and is used to receive the output current of the potentiostat 12 to regulate the potential of the gas pipeline.

[0018] Furthermore, the differential pressure power generation potentiostat system 1 also includes a power conversion module 14 connected to the differential pressure power generation module 11 and a hybrid energy storage module 15 connected to the power conversion module 14. The power conversion module 14 converts the electrical energy generated by the differential pressure power generation module 11 into direct current and charges the hybrid energy storage module 15. The hybrid energy storage module 15 includes a supercapacitor bank and a lithium iron phosphate battery bank. The supercapacitor bank is used to absorb or release energy instantaneously to cope with power fluctuations ranging from seconds to minutes. The lithium iron phosphate battery bank is used to store energy to address hourly energy shortages caused by diurnal variations or prolonged rainy weather.

[0019] The solar-powered intelligent drainage system 2 includes a photovoltaic power generation module 21, an intelligent drainage module 22 connected to the photovoltaic power generation module 21, and a drainage ground bed 23 connected to the intelligent drainage module 22.

[0020] In this embodiment of the present invention, the photovoltaic power generation module 21 adopts a bifacial monocrystalline silicon photovoltaic module and is equipped with a high-power point tracking (MPPT) controller to maximize the solar energy collection efficiency.

[0021] The intelligent drainage module 22 includes a control unit and an AC / DC separation unit. The control unit employs a dynamic interference identification algorithm based on FFT spectrum analysis to analyze the frequency and amplitude characteristics of interference signals on the gas pipeline in real time, distinguishing between DC bias and AC interference. Based on the identification results, it uses an adaptive algorithm to control the magnitude of the leakage current in real time, achieving precise and rapid suppression of interference. The AC / DC separation unit is used to separate and block DC and AC signals, ensuring that the cathodic protection current does not leak and stray AC current is quickly introduced to the ground through the drainage ground bed 23.

[0022] In the gas pipeline protection system of this utility model embodiment, the differential pressure power generation constant potential meter system 1 serves as the main power source, continuously outputting the basic protection current to establish and maintain the basic protection state of the entire pipeline network. The solar intelligent drainage system 2 serves as an auxiliary and enhancement unit, deployed in known or monitored high-risk interference areas (such as intersections with subways or electrified railways). Once dynamic interference is detected, it quickly starts up, dynamically dissipates stray current, and rapidly pulls local potential fluctuations back to a safe range.

[0023] The control platform 3 maintains a communication connection with the differential pressure power generation potentiostat system 1 and the solar intelligent drainage system 2 through a wireless communication network (such as 4G / 5G, LoRa). It is used to remotely monitor the operating status of the differential pressure power generation potentiostat system 1 and the solar intelligent drainage system 2, and to perform fault alarms, energy efficiency analysis and strategy optimization, ultimately achieving high-level cathodic protection that is comprehensive, real-time and adaptive.

[0024] In summary, this utility model's gas pipeline protection system combines pipeline pressure energy generation with solar photovoltaic power generation to construct a dual renewable energy power supply system. Pressure energy generation provides a continuous and stable basic energy source, while solar energy serves as a supplement and regulator, fundamentally solving the problems of energy self-sufficiency and sustainability. By decoupling and then integrating constant potential protection with intelligent drainage functions, the constant potential meter driven by the differential pressure power generation system provides a global basic protection current, while the solar-driven intelligent drainage module precisely focuses on suppressing local interference, achieving the optimal combination of global steady-state control and local transient suppression.

[0025] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gas pipeline protection system that utilizes pressure energy and solar energy in synergistic power supply, characterized in that, include: A differential pressure power generation potentiostat system and a solar-powered intelligent drainage system are respectively connected to the gas pipeline; The differential pressure power generation potentiostat system includes a differential pressure power generation module, a potentiostat connected to the differential pressure power generation module and the gas pipeline respectively, and an anode ground bed connected to the potentiostat. The solar-powered intelligent drainage system includes a photovoltaic power generation module, an intelligent drainage module connected to the photovoltaic power generation module, and a drainage ground bed connected to the intelligent drainage module.

2. The gas pipeline protection system with pressure energy and solar energy co-powered as described in claim 1, characterized in that, The differential pressure power generation module uses a turbine expander or an organic Rankine cycle power generation device.

3. The gas pipeline protection system with pressure energy and solar energy co-powered as described in claim 1, characterized in that, The differential pressure power generation potentiostat system also includes a power conversion module connected to the differential pressure power generation module and a hybrid energy storage module connected to the power conversion module.

4. The gas pipeline protection system with pressure energy and solar energy co-powered as described in claim 3, characterized in that, The hybrid energy storage module includes a supercapacitor bank and a lithium battery bank.

5. The gas pipeline protection system with pressure energy and solar energy co-powered as described in claim 1, characterized in that, The intelligent drainage module includes a control unit and an AC / DC separation unit.

6. The gas pipeline protection system with pressure energy and solar energy co-powered as described in claim 1, characterized in that, It also includes a control platform that maintains communication connections with the differential pressure power generation potentiostat system and the solar intelligent drainage system, respectively.

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