A power distribution system combining energy storage battery compartment with diesel generator

Abstract

The utility model discloses a power distribution system combining an energy storage battery compartment with a diesel generator, including a No. 1 bus and a No. 2 bus, which are connected through a connection cabinet; the No. 1 bus is connected to the diesel generator through an automatic transfer switch; the No. 2 bus is connected to a transition and power distribution system, at least one energy storage battery compartment is provided on the No. 2 bus side, each energy storage battery compartment is connected to the transition and power distribution system through an independent isolation transformer in a power conversion system, and is connected to the transition and power distribution system through the energy storage compartment bus. The power distribution system combines the energy storage battery compartment and the diesel generator, realizes backup power support, improves the utilization rate of the energy storage battery compartment, and realizes automatic switching of loads, so that the utility model has higher reliability and economy when dealing with city power failures or special situations.

Description

Technical Field

[0001] The utility model relates to a power distribution system, in particular to a power distribution system which combines an energy storage battery compartment with a diesel generator. Background Art

[0002] As global climate change and environmental problems become increasingly serious, energy transformation is imperative, and clean energy must be vigorously developed. Energy storage technology is seen as one of the key factors in achieving energy transformation, which can help solve problems such as renewable energy grid connection and imbalance between electricity supply and demand. Energy storage technology has made major breakthroughs in recent years, especially in the field of battery energy storage. The emergence of new battery technologies and the reduction in costs have made the deployment of energy storage systems more economical and feasible.

[0003] The original power distribution system is mainly composed of loads, distribution transformers, switchgear and cables. Loads refer to workshop equipment, lighting equipment, office equipment, etc. The distribution transformer is responsible for transforming, distributing and supplying the power supply, and the switchgear is used to control the switch, branch and protection of the circuit, connecting the power supply source and the load. The original power distribution system has a large power consumption pressure during the peak period of production, and the high peak electricity price and charging price are important factors restricting development.

[0004] Energy storage batteries are an important clean energy technology that can effectively alleviate power pressure in factories and provide cost-effective energy storage solutions. Diesel generators are a commonly used backup power supply equipment that can ensure the reliability of power supply in emergency situations. On the basis of the original power distribution system, exploring the combination of energy storage battery compartments and diesel generators, using energy storage systems to provide additional power loads for factories during peak production power consumption, thereby alleviating power pressure and improving power efficiency is a new topic. Utility Model Content

[0005] In order to solve the deficiencies existing in the above-mentioned technologies, the utility model provides a power distribution system combining an energy storage battery compartment with a diesel generator.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is a power distribution system combining an energy storage battery compartment with a diesel generator, including a No. 1 busbar and a No. 2 busbar, which are connected through a connecting cabinet;

[0007] Connect the diesel generator via the automatic transfer switch on the No. 1 busbar side;

[0008] The No. 2 bus is connected to the transition and distribution system, and at least one energy storage battery compartment is provided on the No. 2 bus side. Each energy storage battery compartment is connected to the transition and distribution system through an independent isolation transformer in the power conversion system, and is connected to the transition and distribution system through the energy storage compartment bus.

[0009] Furthermore, busbar No. 1 and busbar No. 2 are both converted from 10kV busbars to 0.4kV low-voltage lines via 10 / 0.4kV transformers.

[0010] Furthermore, the rear end of bus No. 1 is connected to load No. 1, and the switching control of the automatic transfer switch connects bus No. 1 at the load end to the 10kV bus, or the switching control of the automatic transfer switch connects bus No. 1 at the load end to the diesel generator.

[0011] Furthermore, the rear end of bus No. 2 is connected to load No. 2.

[0012] Furthermore, the contact cabinet is provided with a No. 1 circuit breaker.

[0013] Furthermore, the energy storage cabin bus is a low-voltage line with a voltage level of 0.4kV.

[0014] Furthermore, there is a No. 2 circuit breaker between the busbar of the transition and distribution system and the No. 2 busbar.

[0015] The utility model discloses a power distribution system combining an energy storage battery compartment with a diesel generator. The power distribution system combines the energy storage battery compartment and the diesel generator, realizes backup power support, improves the utilization rate of the energy storage battery compartment and realizes automatic switching of loads, so that the utility model has higher reliability and economy when dealing with mains power failures or special circumstances. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the electrical principle structure of the utility model.

[0017] In the figure: 1. Bus No. 1; 2. Bus No. 2; 3. Liaison cabinet; 4. Automatic transfer switch; 5. Diesel generator; 6. 10 / 0.4kV transformer No. 1; 7. 10 / 0.4kV transformer No. 2; 8. Load No. 1; 9. Power conversion system; 11. Energy storage compartment bus; 12. Load No. 2; 13. Energy storage battery compartment; 14. Isolation transformer; 2QF, circuit breaker No. 1; 4QF, circuit breaker No. 2. DETAILED DESCRIPTION

[0018] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0019] like Figure 1The power distribution system shown in the figure, which combines the energy storage battery compartment with the diesel generator, is formed by taking the plant user side energy storage system as an example, and includes bus No. 1 1 and bus No. 2 2. Bus No. 1 is converted from a 10kV bus to a 0.4kV low voltage line through a 10 / 0.4kV transformer No. 6; bus No. 2 is converted from a 10kV bus to a 0.4kV low voltage line through a 10 / 0.4kV transformer No. 2 7. The automatic transfer switch 4 is connected to the diesel generator 5 on the side of bus No. 1 1, and the rear end of bus No. 1 is connected to load No. 1 8. The switching control of bus No. 1 connected to the load end is connected to the 10kV bus, or the switching control of the automatic transfer switch is connected to the diesel generator, and the rear end of bus No. 2 2 is connected to load No. 2 12. The diesel generator is connected through bus No. 1, and the diesel generator is started in the event of a city power failure or other specific circumstances to supply power to the load below.

[0020] The No. 2 bus 2 is connected to the transition and distribution system 8, and at least one energy storage battery compartment 13 is provided on the No. 2 bus side. Each energy storage battery compartment is connected to the transition and distribution system 8 through an independent isolation transformer 14 in the power conversion system 9, and is connected to the transition and distribution system through the energy storage compartment bus 11. The energy storage compartment bus is a low-voltage line with a voltage level of 0.4kV. There is a No. 2 circuit breaker 4QF between the bus of the transition and distribution system and the No. 2 bus. Therefore, it is equivalent to adding a set of energy storage system on one side of bus No. 2. When the load of the workshop is connected to the transition and distribution system, the energy storage battery compartment can replace the mains to supply power to this part of the load; at the same time, the transition and distribution system can also connect the energy storage battery compartment to bus No. 2, and use the off-peak electricity price at night to charge the battery compartment. In addition, the workshop has a small power load at night, and the grid side can withstand the charging current of the energy storage battery compartment. That is, when the energy storage battery compartment is charged, the mains is transmitted to the isolation transformer through the transition and distribution system. The isolation transformer increases the 0.4kV mains to the charging voltage of the energy storage battery compartment, and then the power conversion system converts the AC into DC to store electricity for the battery compartment. When using energy storage for power supply, PCS converts DC into AC, at which time the voltage is higher, and the power conversion system converts the high-voltage AC into 0.4kV low-voltage AC to supply power to the lower load; in addition, energy storage discharge can also supply power to the load below the mains when the mains stops or stops due to a fault.

[0021] Bus No. 1 and bus No. 2 are connected through a contact cabinet 3, which has a circuit breaker No. 1 2QF. When one of the mains fails, if the mains on bus No. 1 fails, the main incoming switch of bus No. 1 is disconnected, circuit breaker No. 1 2QF of the contact cabinet is closed, the automatic transfer switch does not operate, and the mains on bus No. 2 and the energy storage battery compartment drive the load on bus No. 1. Similarly, when the mains on bus No. 2 fails, it is also possible to consider using the mains on bus No. 1 and the energy storage electricity to drive the load; when both mains fail, the main incoming switches of the two buses are disconnected, the switch of the contact cabinet is closed, and the energy storage electricity temporarily provides the basic power for the factory operation. The important load that cannot be powered off for a long time is added to the lower end of the oil engine, the automatic transfer switch is switched to the oil engine side, and the diesel generator supplies power to the important load until the power is restored.

[0022] In summary, the benefits of the utility model include the following aspects:

[0023] The power distribution system combines energy storage battery cabins and diesel generators, which can start diesel generators in the event of a mains failure or in certain circumstances to provide backup power support for the loads below the factory. This ensures the continuous operation of the production process and reduces losses caused by power outages.

[0024] By connecting the energy storage battery compartment to the transition and power distribution system, the workshop load can be connected to the energy storage battery compartment, so that the energy storage battery compartment can replace the mains power to supply power to the load. At the same time, when the electricity price is low during the off-peak hours at night, the energy storage battery compartment can be connected to the No. 2 busbar and the mains power can be used to charge the energy storage battery compartment. This can improve the utilization rate of the energy storage battery compartment and reduce energy costs.

[0025] Automatic transfer switches and circuit breakers are set up in the power distribution system to achieve automatic switching when the mains fails. When one mains fails, it automatically switches to the other mains or the energy storage battery compartment; when both mains fail, it automatically switches to the diesel generator. This ensures continuous power supply to the load and improves power supply reliability.

[0026] The above implementation modes are not limitations of the present invention, and the present invention is not limited to the above examples. Any changes, modifications, additions or substitutions made by technicians in this technical field within the technical solution of the present invention also belong to the protection scope of the present invention.

Claims

1. A power distribution system combining an energy storage battery compartment with a diesel generator, characterized in that: It includes bus No. 1 and bus No. 2, which are connected via a connecting cabinet; Connecting a diesel generator via an automatic transfer switch on the No. 1 bus side; In the case where the No. 2 bus is connected to the transition and power distribution system, at least one energy storage battery compartment is provided on the No. 2 bus side. Each energy storage battery compartment is connected to the transition and power distribution system through an independent isolation transformer in the power conversion system, and is connected to the transition and power distribution system together through the energy storage compartment bus.

2. The power distribution system combining the energy storage battery compartment with the diesel generator according to claim 1 is characterized in that: The No. 1 busbar and the No. 2 busbar are both converted from 10kV busbars to 0.4kV low-voltage lines via 10 / 0.4kV transformers.

3. The power distribution system combining the energy storage battery compartment with the diesel generator according to claim 2 is characterized in that: The rear end of the No. 1 bus is connected to the No. 1 load, and the switching control of the automatic transfer switch connects the No. 1 bus at the load end to the 10kV bus, or the switching control of the automatic transfer switch connects the No. 1 bus at the load end to the diesel generator.

4. The power distribution system combining the energy storage battery compartment with the diesel generator according to claim 3 is characterized in that: The rear end of the No. 2 busbar is connected to a No. 2 load.

5. The power distribution system combining the energy storage battery compartment with the diesel generator according to claim 4 is characterized in that: The contact cabinet is provided with a No. 1 circuit breaker.

6. The power distribution system combining the energy storage battery compartment with the diesel generator according to claim 4 is characterized in that: The energy storage cabin busbar is a low-voltage line with a voltage level of 0.4kV.

7. The power distribution system combining the energy storage battery compartment with the diesel generator according to claim 4 is characterized in that: A No. 2 circuit breaker is provided between the busbar of the transition and power distribution system and the No. 2 busbar.

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