Source network load storage type thermoelectric coupling system
By designing a source-network load-storage thermoelectric coupling system, and using the connection between the DC bus and a variety of energy modules, the flexible adjustment and stability of the energy system are achieved, solving the problems of low energy utilization and high cost in the existing systems.
Patent Information
- Application Number
- CN202510499455.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-21
- Publication Date
- 2025-07-29
AI Technical Summary
The operation of existing energy systems alone results in low energy utilization and high operating costs, making it difficult to achieve complementary advantages between different energy forms.
Design a source-network load storage thermoelectric coupling system, which is connected to a variety of energy modules (such as photovoltaic modules, power stations, battery modules, heat storage boxes, etc.) through a DC bus, and uses a bidirectional converter to achieve flexible energy regulation and optimization.
It improves the flexibility and stability of the energy system, improves energy utilization efficiency, reduces operating costs, and adapts to the random fluctuations of user heating load.
Smart Images
Figure CN120389375A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of new power systems, and particularly to a source-grid-load-storage thermoelectric coupling system. Background Art
[0002] With the rapid development of social economy, the demand for energy in all walks of life is increasing. Therefore, the increasing depletion of energy has become a major problem that cannot be ignored nowadays, followed by environmental pollution and climate change. Therefore, finding an environmentally friendly and efficient energy that can replace traditional energy has become the top priority task, and the utilization of clean energy has emerged as the times require, mainly including solar energy and wind energy.
[0003] Most current energy systems operate independently. Such systems not only have low energy utilization efficiency but also high operating costs. Therefore, a source-grid-load-storage integrated system that can couple multiple energies and achieve complementary advantages between different energies has been proposed. The source-grid-load-storage integrated system breaks through the limitations of the independent operation of each energy subsystem through the interaction between the source side, grid side, user side, and energy storage side, provides a solution for the collaborative optimization and matching between different energy forms, and improves the flexibility and reliability of system energy supply while meeting diversified energy consumption needs.
[0004] Source-grid-load-storage integration is one of the important ways to promote the evolution of the power system towards adapting to large-scale and high-proportion new energy, and is an important part of the digital and intelligent upgrading of the energy industry. It can achieve efficient energy utilization, fully absorb clean energy, and provide stable energy supply for users. Summary of the Invention
[0005] The purpose of the present invention is to provide a source-grid-load-storage thermoelectric coupling system with a relatively simple system structure, fast response speed, easy adjustment, and capable of improving the flexibility and stability of the energy supply system.
[0006] To achieve the above object, the present invention provides a source-grid-load-storage thermoelectric coupling system, including a DC bus. The power input terminals of the DC bus are respectively electrically connected to a photovoltaic module through a first DC / DC converter and to a power station through an AC / DC rectifier. The power output terminal of the DC bus is electrically connected to the power grid through a DC / AC bidirectional converter and to a heater through a first DC / AC inverter. The heater is respectively connected to a heat storage tank, a regenerative heat exchanger, and a heat load through a heat pipeline network. The heat storage tank is connected to the regenerative heat exchanger through a pipeline, and the regenerative heat exchanger is connected to the heat load.
[0007] Preferably, the power input terminal of the DC bus is electrically connected to a battery module through a DC / DC bidirectional converter.
[0008] Preferably, the power output end of the DC bus is electrically connected to an AC load through a second DC / AC inverter.
[0009] Preferably, the power output end of the DC bus is electrically connected to a DC charging pile through a second DC / DC converter.
[0010] Preferably, the voltage of the DC bus is 750V.
[0011] Therefore, the beneficial effects of adopting the above-mentioned source-network-load-storage type thermoelectric coupling system in the present invention are as follows: (1) The DC bus integrates source-network-load-storage resources, and through load matching and coordination, the overall energy efficiency of the thermoelectric coupling system is improved.
[0012] (2) The DC bus is connected to the power grid through a bidirectional converter. After the heat storage tank and the battery module are fully loaded, the excess electric energy can be grid-connected to improve the economy of the system. At the same time, when the energy supply on the source side is insufficient, the power grid directly supplies energy. The battery module is coupled to the DC bus through a bidirectional DC converter, which can not only absorb new energy but also supply energy when the energy supply on the source side is insufficient, overcoming the mismatch between the volatility of renewable energy power generation and the randomness of user loads, and improving the flexibility and stability of the energy supply system.
[0013] (3) The heat storage tank can not only adapt to the random fluctuations of the user's heating load but also absorb new energy, improving the flexibility of the thermoelectric coupling system. The heat storage tank stores heat through an electric heater, and the system structure is relatively simple, with a fast response speed and can be flexibly adjusted.
[0014] Next, through the drawings and embodiments, the technical solutions of the present invention will be further described in detail. Description of the Drawings
[0015] Figure 1 It is a schematic structural diagram of an embodiment of a source-network-load-storage type thermoelectric coupling system of the present invention. Detailed Embodiments
[0016] The technical solutions of the present invention will be further described below through the drawings and embodiments.
[0017] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the ordinary meanings understood by those of ordinary skill in the field to which the present invention pertains. The terms "first", "second" and similar terms used in the present invention do not denote any order, quantity or importance, but are only used to distinguish different components. Words such as "comprising" or "including" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.
[0018] Embodiment 1 As Figure 1 shown, the present invention provides a source-network-load-storage type thermoelectric coupling system, including a DC bus. The power input ends of the DC bus are respectively electrically connected to a photovoltaic module through a first DC / DC converter and to a power station through an AC / DC rectifier, for receiving the power supply from the photovoltaic module and the power station. In addition, the power input end of the DC bus is also electrically connected to a battery module through a DC / DC bidirectional converter, which can not only absorb new energy but also supply energy when the energy supply on the source side is insufficient, and can effectively overcome the mismatch between the volatility of renewable energy power generation and the randomness of user loads, which is beneficial to improving the flexibility of the energy supply system. Among them, the voltage of the DC bus is 750V, which can balance the efficiency of the converter and the inverter.
[0019] The power output end of the DC bus is electrically connected to the power grid through a DC / AC bidirectional converter. After the heat storage device and the battery module are fully loaded, the excess electric energy can be grid-connected to improve the economy of the system. At the same time, when the energy supply at the power input end is insufficient, the power grid directly supplies energy, improving the flexibility of the energy supply.
[0020] The power output end of the DC bus is also electrically connected to a heater through a first DC / AC inverter. A heat storage tank and a heat storage heat exchanger are connected to the heater. It can not only adapt to the random fluctuations of the user's heating load but also absorb new energy, improving the flexibility of the thermoelectric coupling system. The heat storage tank is also connected to the heat storage heat exchanger through a pipeline, and a heat load is connected to the heat storage heat exchanger to supply heat to the user. The heater can also be directly electrically connected to the heat load to directly supply heat to the user, having high heating flexibility.
[0021] In addition, the power output end of the DC bus is also electrically connected to an AC load through a second DC / AC inverter and to a DC charging pile through a second DC / DC converter to supply energy to the corresponding equipment.
[0022] Therefore, the present invention adopts the above-mentioned source-network-load-storage type thermoelectric coupling system, which has a relatively simple system structure, a fast response speed, is easy to adjust, and can improve the flexibility and stability of the energy supply system.
[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that they can still modify or equivalently replace the technical solutions of the present invention, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present invention.
Claims
1. A source-network-load-storage type thermoelectric coupling system, characterized in that: It includes a DC bus, the power input terminals of the DC bus are electrically connected to a photovoltaic module through a first DC / DC converter and to a power station through an AC / DC rectifier respectively, and the power output terminal of the DC bus is electrically connected to a power grid through a DC / AC bidirectional converter and to a heater through a first DC / AC inverter; the heater is connected to a heat storage tank, a heat storage heat exchanger and a heat load through a heat pipe network respectively, the heat storage tank is connected to the heat storage heat exchanger through a pipeline, and the heat load is connected to the heat storage heat exchanger.
2. The source-network-load-storage type thermoelectric coupling system according to claim 1, wherein: The power input terminal of the DC bus is electrically connected to a battery module through a DC / DC bidirectional converter.
3. The source-network-load-storage type thermoelectric coupling system according to claim 1, characterized in that: The power output terminal of the DC bus is electrically connected to an AC load through a second DC / AC inverter.
4. A source-network-load-storage type thermoelectric coupling system according to claim 1, characterized in that: The power output terminal of the DC bus is electrically connected to a DC charging pile through a second DC / DC converter.
5. A source-network-load-storage type thermoelectric coupling system according to claim 1, characterized in that: The voltage of the DC bus is 750V.