Digital twin microgrid, build an integrated management and control platform for source, network, load and storage

foreword

The "14th Five-Year Plan for Modern Energy System" proposes to innovate the structural form and operation mode of the power grid and accelerate the construction of a modern energy system. Accelerate the transformation and upgrading of the distribution network, promote the construction of an intelligent distribution network, and improve the carrying capacity and flexibility of the distribution network to accept new energy and diversified loads. Actively develop smart micro-grids that mainly consume new energy to achieve compatibility and complementarity with large power grids.

At the United Nations Climate Summit in 2020, my country officially proposed the "3060" dual carbon goal. In order to achieve the goal of "carbon peaking by 2030 and carbon neutrality by 2060", we will strive to build a clean, low-carbon, safe and efficient energy system, improve the level of clean energy utilization and the operation efficiency of the power system, and better utilize the load on the source network The role of storage integration and multi-energy complementarity in ensuring energy security.

Show results

Under the new power system, the operation of the power grid gradually presents the characteristics of intelligence and digitization. The development of "source-network-load-storage integration" operation urgently requires cloud computing, big data, power Internet of Things, edge computing and other technical means of "cloud, big data, power Internet of things, edge computing", so that the power grid system is equipped with massive data processing and analysis, highly intelligent Cloud solutions for decision-making and other capabilities. In order to realize the integration of various energy resources, break through the barriers between multiple energy links, and make the elements of "source, network, load and storage" truly achieve friendly coordination.

Tupu software uses the independent research and development engine HT for Web to digitally twin the Web intelligent "dual carbon" microgrid scenario, effectively realizing the integrated management and control of source, network, load and storage. The overall scene adopts a lightweight modeling method, focusing on modeling and restoring equipment and buildings in the four aspects of source, network, load, and storage in the power grid connection of the smart park, bringing users a "cyberpunk" visual experience. By adopting the method of lightweight re-modeling, designers have room to play "design" and show more aesthetic creativity. Supports 360-degree observation of the dynamic data of each link of the source network, load and storage in the virtual park. Through the built-in interaction of the Tupu software HT, you can realize the mouse rotation, translation, zoom in and zoom out operations, and also realize the touch screen device. One-finger rotation, two-finger zoom, and three-finger pan operations no longer have to worry about different interaction modes across platforms.

The comprehensive management and control of distributed photovoltaic power generation system, energy storage system, solar energy + air source heat pump hot water system is realized through the fully reproduced energy system of the park by Tupu software. Through the smart energy management system, the coordinated operation of building energy efficiency management, comprehensive energy conservation management and "source, network, load and storage" can be realized.

"Integration of source, network, load and storage" is an operation mode and technology that can maximize the utilization of energy resources. Economically, efficiently and safely improve the power dynamic balance capability of the power system.

System analysis

source "source" complementary

The smart microgrid in the Tupu Dual-Carbon Smart Park is mainly based on a variety of renewable energy sources, and the power input is mainly photovoltaic, hydrogen energy, natural gas, biogas and other mature power generation technologies. Photovoltaic is a green energy and has the characteristics of reducing carbon dioxide emissions of greenhouse gases. Assuming that the average daily power generation is 1000 kWh, the CO₂ emission reduction is about 785 kg, which can greatly reduce carbon emissions.

Different power sources can be effectively coordinated through the "source, network, load and storage integration" platform, that is, through the coordination and complementation between flexible power generation resources and clean energy, to solve the randomness and fluctuation of clean energy power generation output due to environmental and meteorological factors. It can effectively improve the utilization efficiency of renewable energy, reduce the rotating reserve of the power grid, and enhance the self-regulation ability of the system.

The smart new energy system produced by Hightopo is displayed in a "cyberpunk" style, highlighting equipment models such as energy routers, transformers, power distribution rooms, etc., using the graphical configuration SCADA capability provided by HT, and expressing photovoltaic from light in a flowing line. It can be converted into electric energy, and then to the equipment to supply power and store the whole process. The daily excess power, accumulated power consumption, light duration, and irradiance are separately counted, which is conducive to integrated analysis. Use the bar chart to dynamically display the AC source output and commands within 24 hours, grasp the daily data changes, and improve the power control ability.

energy tower

The power tower is directly connected to the power grid of the smart park, and the excess energy generated by the project will be fed into the power system of the entire park when it is sufficient to charge the car. Integrate technical equipment such as distributed photovoltaic power generation systems to realize power input. Data monitoring of rated output, outlet voltage, rated capacity, rated voltage, weight, and gear distance is carried out through the 2D panel in the visualization scene of the Tupu software to understand the power situation on the "source" side.

There are two kinds of common AC power frequency in the world, 50Hz (Hertz) and 60Hz (Hertz), and the civilian AC voltage distribution ranges from 100V to 380V. The computer room generally introduces three-phase 380V, 50HZ mains as the power supply, but the power rectifier module of the equipment uses a single-phase 220V voltage.

transformer

Transformers are the basic equipment for power transmission and distribution, and are widely used in industry, agriculture, transportation, urban communities and other fields. There are about 17 million transformers operating on the grid in my country, with a total capacity of about 11 billion kVA. Transformer losses account for about 40% of power losses in transmission and distribution. Display AC Hz, voltage level, energy-saving sequence, and rated capacity data on the 2D panel, which is conducive to the improvement of energy-saving efficiency.

switch room

The power distribution room refers to the indoor power distribution place with low-voltage loads, mainly for low-voltage users or power facilities to distribute electric energy. The incoming lines of the low-voltage power distribution room are generally distributed by the low-voltage switchgear in the 35kV or 10kV substation. 400V cable. Through the HT 2D panel of the Tupu software, the data monitoring of the current frequency, the power consumption of the whole machine, the AC voltage and the AC current in the power distribution room is realized, which is convenient for operation and maintenance management.

Source "net" coordination

On the basis of the coordinated operation of the existing power supply and the power grid, the new power grid regulation technology effectively solves the "unfriendly" problem of large-scale grid connection of new energy and distributed power supply to the power grid, allowing new energy and conventional power to participate in the power grid together adjust. The DC energy router, the core equipment of the energy Internet, is used to meet the complexity and diversity requirements of the power grid in the future.

The 3D model effect of the core equipment on the “network” side in the Tupu Software Smart Double Carbon Park is mainly presented with textures to ensure efficient loading and smooth operation in the web page. It can provide the function of importing BIM in IFC format, and use BIM information to reduce development costs in some scenarios.

Renewable power supplies show great instability in terms of output power, voltage level, frequency quality, etc. If these distributed energy sources are directly connected to the grid, it will cause different degrees of disturbance to the large power grid. Using the 2D configuration of Tupu software, it can display the equipment connection status of alternating current, direct current and information flow, and control the running node information of current on one screen. Use the red dynamic connecting line to show the flow of direct current from the rooftop photovoltaic - energy router A \ energy router B - charging pile \ energy storage equipment; use the yellow dynamic connecting line to show the information flow from energy router A \ energy router B - The IoT management platform - the flow process of the smart dual-carbon park; the blue dynamic connection line is used to display the flow process of the alternating current from the gate - the energy router - the consumer end; it is convenient for operation and maintenance to monitor node information and increase the stability of grid connection.

Compared with traditional configuration software such as InTouch/IFix/WinCC, Tupu's web-based platform is more suitable for the general trend of C/S to B/S transformation. The multi-element rich visualization components and fast data binding methods are available. for rapid creation and deployment. Provide 2D, 2.5D, 3D for various industrial scenarios (click the link to jump to the relevant page), a variety of clear and beautiful visualization service modes. It meets the modern, high-performance, cross-platform (desktop Mouse/Mobile Touch/VR) data visualization needs of the Industrial Internet of Things, bringing an immersive user experience.

energy router

Energy router is a kind of power equipment that integrates information technology and power electronic conversion technology to realize efficient utilization and transmission of distributed energy. It can be used as the interaction interface between the power local area network and the backbone network. On the one hand, it is responsible for the operation and energy management of various devices in the local area network, and at the same time, it receives the instructions from the upper-level power dispatching center and uploads the operating status of the local area network. Render a punk-like effect with HT for Web, and add a 2D panel on the energy router to display runtime and status.

Power electronic conversion technology enables energy routers to provide the required electrical interface forms for various types of distributed power sources, energy storage devices and new loads, including DC or AC forms of various voltages and currents. Alternating current is still the main form of power utilization, and it is a logical method to manage distributed power by installing AC busbars.

In the future, on the basis of local consumption, the power grid will use microgrids and smart communities as autonomous units to form a bottom-up interconnection of energy units. The huge synchronous power grid is split into asynchronous and autonomous interconnected power local area networks, and energy deployment and network interconnection are carried out through the Digital Grid Router (DGR).

Internet "load" interaction

On the "load" side, the 24-hour photovoltaic source output can be displayed through the dynamic graph of the Tupu software HT, and the peak and valley values of the power can be grasped. Use the donut chart to display the ratio of air conditioners, lighting, charging piles and other power-consuming equipment, and pay close attention to high-energy-consuming equipment for consumption reduction regulation. When a problem occurs or is about to occur in the power grid, the power flow distribution can be changed through active load regulation and response to ensure the safe, economical and reliable operation of the power grid.

Smart charging pile

Smart electric vehicle charging or smart charging refers to a system in which electric vehicles share data connections with charging devices, and charging devices share data connections with charging operators. Unlike traditional charging devices, smart charging systems intelligently monitor, manage and limit the usage of their devices to optimize energy consumption. Through HT for Web, a lightweight smart charging station is designed in the form of textures, which can get rid of the limitation of hardware equipment and realize the monitoring of charging piles at any time. Simulate the charging process of the vehicle entering the station, and display the charging times, current power, charging capacity, and battery life of the intelligent charging pile; when the vehicle electromagnetically fails, a flashing red box will appear to remind the station operation and maintenance personnel.

Smart charging system controls for devices include simple charging on and off, one-way control of the vehicle (V1G), which allows charging rates to be increased or decreased, and the technically challenging two-way vehicle-to-grid (V2G), which allows electric vehicles to discharge mode to provide services to the grid.

Smart Building

Smart buildings are the integration of advanced technologies in construction, communication, computer and control, and rational integration into an optimized whole. It is a new type of modern building that can adapt to the development needs of the information society. Use the 2D panel in the Tupu Shuangcarbon Smart Park to intelligently monitor the energy consumption of elevators, air conditioners, and lighting in the building, and efficiently manage the building.

Online "storage" interaction

Energy storage is an indispensable part of the microgrid. It is used as a load to charge when the electricity consumption is low, and it is used as a power source to release electricity when the electricity consumption peaks. It can play the role of peak shaving and valley filling in the microgrid, which greatly improves the utilization efficiency of intermittent energy.

SOH storage tank

Clicking on the energy storage box in the park will pop up a 2D panel for statistics and fault warning of the current capacity, battery temperature, SOH battery health status, accumulative charging capacity, accumulative charging times, and fire risk to ensure the safety of the container system. Tupu software provides a complete pipeline operation tool chain, from view component design, icon design, 2D drawing design to 3D scene design, there are one-stop development tools, designers and programmers can achieve collaborative development, and quickly implement 2D and 3D visualization results.

With the continuous development of science and technology, the current energy storage mainly includes battery energy storage, flywheel energy storage, superconducting magnetic energy storage, and supercapacitor energy storage. serious pollution problem.

The battery system is mainly composed of cells in series and parallel: first, a dozen groups of cells are connected in series and parallel to form a battery box, and then the battery boxes are connected in series to form a battery string and increase the system voltage. Finally, the battery string is connected in parallel to increase the system capacity, and integrated Installed in the battery cabinet. The energy storage converter is an energy conversion unit that converts battery DC power into three-phase AC power, which can operate in grid-connected and off-grid modes. In grid-connected mode, the converter interacts with the power grid according to the power command dispatched by the upper layer; in off-grid mode, the energy storage converter can provide voltage and frequency support for the plant load, and provide black-start power for some renewable energy sources.

Realize value

As a micro integrated energy system close to the user side, the microgrid covers primary energy such as solar energy, wind energy and secondary energy of electricity, and involves multiple energy transmission and distribution networks of electricity, heat and gas and load demand, energy storage, control and protection equipment and information platform, it is necessary to take electric energy as the core, through multi-energy interconnection, information energy coupling and market economy guidance, to achieve multi-energy "supply-demand-storage" coordination optimization and self-balancing.

Summarize

Relying on new technologies such as modern information communication, big data, artificial intelligence, energy storage, etc., and using the new model of "Internet +", the load-side adjustment and response capabilities are mobilized. In urban commercial areas, complexes, and residential areas, relying on photovoltaic power generation, grid-connected microgrids, and charging infrastructure, etc., develop park (residential) level that combines distributed power generation and flexible charging and discharging of electric vehicles (user energy storage). Source-network-load-storage integration construction. In areas with large industrial loads and good new energy conditions, support the development and construction of distributed power sources and nearby access and consumption, and carry out the construction of green power supply parks integrating source, network, load, and storage in combination with incremental power distribution networks.

Through the intelligent router-new energy micro-grid, the connection and adjustment of the park, mains, photovoltaic, energy storage, charging pile, and daily load can be realized to achieve the "double carbon" goal.

For more industry application examples, please refer to the case link on the official website of Tupu Software: https://www.hightopo.com/demos/index.html