Application Case of Multi-Energy Complementary DC Microgrid and Pumping Unit Group Control Energy-Saving Technology

Multi-Energy Complementary DC Microgrid and Pumping Unit Group Control Energy-Saving Technology

Source:

https://www.miit.gov.cn/jgsj/jns/nyjy/art/2024/art_9ada9b2b5c0d48deac9a16dcabad89b2.html

"National Industrial Energy-Saving and Carbon-Reduction Technology Application Guide and Cases (2024 Edition)" Part Nine: Industrial Green Microgrid Technology

Published: 2024-05-31 10:18 Source: Department of Energy Conservation and Comprehensive Utilization

Multi-Energy Complementary DC Microgrid and Pumping Unit Group Control Energy-Saving Technology Application Case

1. Scope of Technical Application

Applicable to oil wells and wellsite microgrids.

2. Technical Principles and Process

A new-type distributed smart grid with flexible DC distribution as its core is adopted to realize coordinated and optimized operation of "source-grid-load", improving the new energy consumption rate of oilfields and reducing line losses.

Through dynamic tracking and adjustment of motor power, the regenerative energy of pumping units is shared. Through time-sharing optimization and coordinated group control of multiple pumping units, the superposition of high-current peaks is avoided, peak shaving and valley filling are achieved, and the scattered redundant transformer capacity is centrally shared, reducing the power supply capacity of grid transformers and other generator sets and realizing dynamic load balancing.

The technical principle is shown in Figure 1.

3. Technical Functions, Features and Indicators

(1) Through time-sharing optimization and coordinated group control of multiple pumping units, the total transformer capacity is reduced by 65%;

(2) New energy is used to reduce the power consumption of the mechanical production system, and the system energy-saving efficiency can reach 20%~35%.

4. 4.Application Case

(1) Basic project information: The technology provider is Zhongshida Lantian (Qingdao) Petroleum Technology Co., Ltd., and the application unit is Dongxin Oil Production Plant. Before the retrofit, power was supplied by 23 transformers with a total capacity of 800 kVA; the main type of energy consumption was electricity; the annual oil output was 22 million tons; and the energy consumption per unit time was 3992 kWh/day.

(2) Main technical retrofit content: A 100 kW photovoltaic power generation system, a 70 kWh energy storage system, a 5 kW wind power system and an oil well DC group control system were installed, and 20 transformers were eliminated. The energy-saving retrofit was implemented in 2020 4, with an implementation period of 1 year.

(3) Energy-saving and carbon-reduction effects and investment payback period: After the retrofit was completed, the energy consumption per unit time was reduced to 3142 kWh/day, but because all power used is green electricity with no additional power supply, an energy saving of 355.6 tons of standard coal/year and a carbon dioxide emission reduction of 945.8 tons/year can be achieved. The investment amount was 205.7 ten thousand yuan, and the investment payback period was 2.7 years.

5. Introduction to VGID POWER Green Microgrid Technology and Microgrid Energy Storage ConverterPCS

VGID POWER actively responds to the needs of national industrial energy-saving and carbon-reduction application policies, focusing on green microgrid technology and the research and development of converter PCS, the core module of commercial and industrial microgrids.

For oilfield oil extraction and industrial construction scenarios in remote areas, the 30KW/60KW photovoltaic-storage integrated converter PCS module has been developed. VGID POWER has more than ten years of rich domestic and international cases and application experience in microgrid technology, and has unique product design advantages:

(1) The unique air duct isolation design of the VGID POWER PCS converter module can effectively ensure stable and reliable operation even under extremely harsh outdoor conditions.

(2) The VGID POWER PCS converter module can effectively connect to multiple energy equipment sources such as photovoltaics, diesel generators and wind turbines.

(3) The VGID POWER PCS converter module features a wide-voltage design, allowing free selection of energy storage battery capacity from 30kwh-120kwh for flexible combination, with strong scenario compatibility.

(4) The VGID POWER PCS converter module has three conventional application scenarios: grid-connected, off-grid and grid-connected/off-grid. In combination with STS equipment, it can realize active seamless switching of energy storage and backup power, with passive backup power switching time as low as 10ms, which is at a leading level in the industry.

(5) Using the VGID POWER PCS converter module, greater power can be obtained through device stacking, with native support for parallel operation of 15 devices. With the matching STS and MPPT modules, it can also be freely configured as needed to meet the microgrid application scenarios of actual requirements.

(6) The VGID POWER PCS converter module can be coupled with third-party equipment via AC coupling or be compatible with third-party equipment via DC coupling.

6. VGID POWER will continue to focus on green microgrid technology and continue to invest in research and development focused on commercial and industrial application scenarios. Friends from all walks of life are welcome to exchange and cooperate.

Business contact reception:

Engineer Deng 13660246009