Security power supply wiring scheme based on fire storage combined operation
By introducing energy storage systems into the diesel generator set system, the risk of mechanical failure caused by infrequent use of diesel generator sets and the problem of inability to meet the security power load, achieving higher safety and reliability, and responding quickly when power is lost in the entire plant.
Patent Information
- Application Number
- CN202311442440.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-10-31
- Publication Date
- 2025-05-02
AI Technical Summary
In the prior art, diesel generator sets are infrequently used, and there is a risk of mechanical failure, and the load of the security power supply cannot meet the one-time loading when the entire factory loses power, resulting in a risk of safe shutdown.
The security power wiring scheme based on fire storage joint operation is adopted. By setting up an energy storage system in the factory and supplying power to the security power supply in the entire factory when power outages are performed, the stable supply of the power is ensured.
It improves the safety and reliability of diesel generator sets, reduces the risk of mechanical failure, and responds quickly when power is lost in the entire factory, reducing damage to the generator set structure.
Smart Images
Figure CN119921455A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a wiring scheme, in particular to a safety power supply wiring scheme based on fire-storage combined operation. Background Art
[0002] In the prior art, traditional thermal power plants are equipped with quick-start diesel generators as AC emergency power supplies to ensure that the units can be safely shut down when AC power is lost. However, since diesel generators are not often used, some problems are not discovered. Moreover, as the units age, the risk of mechanical failure will be greater if the equipment is not regularly maintained.
[0003] For example, common problems encountered with diesel generator sets include: (1) battery failure. (2) insufficient coolant. (3) fuel leak. (4) oil leakage. (5) incorrect control settings. (6) fuel backflow. (7) empty fuel tank, etc.
[0004] The above problems often lead to diesel generator failure and inability to start, which brings risks to the operation of the unit. In addition, due to the capacity limitation of diesel generators, the load of the security power supply cannot meet the requirements of one-time loading when the whole plant loses power, but needs to be loaded in stages and batches according to the nature and importance of the load. The complex control logic also brings risks to the safe shutdown of the unit when the whole plant loses power.
[0005] In the prior art, the switching of the security EMCC power supply is achieved by interlocking the diesel generator power circuit breaker and the working / standby power circuit breaker on the security EMCC section and / or low voltage judgment. Each EMCC section has 3 incoming power supplies, 2 working power supplies (one of which can be set to work and one to standby), and 1 diesel engine power supply. This also means that when the whole plant loses power, whether the security EMCC section can restore power normally depends entirely on whether the diesel generator set can start normally and run under load. Due to various problems with the diesel generator itself, it will bring risks to the safe shutdown of the generator set. Summary of the invention
[0006] The purpose of the present invention is to invent a safety power supply wiring scheme based on the joint operation of fire and energy storage, by setting up an energy storage system in the factory and cooperating with a diesel generator to supply power to the safety power supply when the whole factory is out of power, thereby effectively improving safety and reliability.
[0007] To this end, the present application discloses a safety power supply wiring scheme based on joint operation of fire and energy storage, the wiring scheme includes: a working power supply, a safety power supply, a diesel generator set and an energy storage system, the energy storage system includes a PCS cabin and a battery compartment, the battery compartment is connected to the PCS cabin, the PCS cabin is connected to the safety power supply and the working power supply, the safety power supply is connected to the working power supply and is configured with a safety EMCC section; the working power supply includes a first working power supply and a second working power supply; the safety EMCC section is configured to send a first working power supply tripping signal and a second working power supply closing signal after a delay of 3-5 seconds when the safety EMCC bus loses pressure, and the diesel engine starts automatically at the same time.
[0008] In a preferred example, the security EMCC section includes 4 incoming power supplies, 2 working power supplies, 1 backup power supply, and 1 diesel engine power supply.
[0009] In a preferred example, the wiring scheme is further configured with circuit breakers, and the circuit breakers include a first working power circuit breaker, a second working power circuit breaker and a backup power circuit breaker.
[0010] In a preferred example, it is characterized in that the working power circuit breaker and the backup power circuit breaker are configured so that when the second power circuit breaker is closed successfully, the diesel generator set exits operation, and when the second working power circuit breaker fails to close, it immediately switches to the backup power circuit breaker.
[0011] In a preferred example, the wiring scheme is further configured with a PLC device, and the PLC device is configured to be connected to the circuit breaker and to control the start-up of the diesel generator set after receiving a power failure signal.
[0012] In a preferred example, the wiring scheme further includes a security PC segment, and the security PC segment is configured between the diesel generator set and the security EMCC segment.
[0013] The main advantages of the present invention are:
[0014] (1) The energy storage system and diesel generator of the wiring scheme proposed in the present invention are both independent power sources and are not affected by the operation of the power system.
[0015] (2) The energy storage system of the wiring scheme proposed by the present invention is simple to maintain on a daily basis. When energy storage is configured, no additional maintenance is required except for conventional electrical equipment such as energy storage security transformers. The energy storage system itself can be unattended and remotely operated and maintained.
[0016] (3) The power wiring scheme proposed in the present invention ensures that the response time is maintained at 1 s by using an energy storage system, thereby ensuring that when a power outage occurs in the entire plant, structures such as the generator set will not suffer significant damage.
[0017] A large number of technical features are recorded in the specification of this application, which are distributed in various technical solutions. If all possible combinations of technical features of this application (i.e., technical solutions) are to be listed, the specification will be too long. In order to avoid this problem, the various technical features disclosed in the above-mentioned invention content of this application, the various technical features disclosed in the various embodiments and examples below, and the various technical features disclosed in the accompanying drawings can be freely combined with each other to form various new technical solutions (these technical solutions are all deemed to have been recorded in this specification), unless the combination of such technical features is technically infeasible. For example, in one example, feature A+B+C is disclosed, and in another example, feature A+B+D+E is disclosed, and features C and D are equivalent technical means that play the same role. Technically, only one can be used, and it is impossible to use them at the same time. Feature E can be combined with feature C technically. Then, the solution of A+B+C+D should not be deemed to have been recorded because it is technically infeasible, and the solution of A+B+C+E should be deemed to have been recorded. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is the wiring scheme used in the prior art;
[0019] Figure 2 is a schematic diagram of a wiring scheme according to an embodiment of the present invention; DETAILED DESCRIPTION
[0020] After careful and in-depth research, the inventor has developed for the first time a safety power wiring scheme based on the combined operation of fire and energy storage. Compared with the prior art, the present invention uses an energy storage system to ensure that the response time is maintained at 1s, thereby ensuring that when the whole plant loses power, the generator set and other structures will not be seriously damaged. The energy storage system is simple to maintain on a daily basis. In the case of energy storage, no additional maintenance is required except for conventional electrical equipment such as energy storage security transformers. The energy storage system itself can achieve unmanned operation and remote operation and maintenance.
[0021] Example
[0022] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings.
[0023] The first embodiment of the present invention relates to a safety power supply wiring scheme based on the combined operation of fire and energy storage, characterized in that the wiring scheme includes: a working power supply, a safety power supply, a diesel generator set and an energy storage system, wherein:
[0024] The energy storage system includes a PCS compartment and a battery compartment, the battery compartment is connected to the PCS compartment, and the PCS compartment is connected to the security power supply and the working power supply;
[0025] The safety power supply is connected to the working power supply and is equipped with a safety EMCC section; the working power supply includes a first working power supply and a second working power supply; optionally, in one embodiment, the safety EMCC section includes 4 incoming power supplies, 2 working power supplies, 1 standby power supply, and 1 diesel engine power supply. And the safety EMCC section is configured to send a first working power supply tripping signal and a second working power supply closing signal after a 3-5 second delay when the safety EMCC bus loses pressure, and the diesel engine starts automatically at the same time.
[0026] Optionally, in one embodiment, the wiring scheme is further configured with a circuit breaker, and the circuit breaker includes a first working power circuit breaker, a second working power circuit breaker, and a backup power circuit breaker. The working power circuit breaker and the backup power circuit breaker are configured such that when the second power circuit breaker is successfully closed, the diesel generator set exits operation, and when the second working power circuit breaker fails to close, it immediately switches to the backup power circuit breaker.
[0027] Optionally, in one embodiment, the wiring scheme is further configured with a PLC device, the PLC device is configured to be connected to the circuit breaker and control the start-up of the diesel generator set after receiving a power failure signal. The wiring scheme also includes a security PC segment, the security PC segment is configured between the diesel generator set and the security EMCC segment.
[0028] In this embodiment, when the safety EMCC bus loses pressure, after a delay of 3-5 seconds (avoiding the relay protection and the automatic input time of the backup power supply), the first working power trip signal and the second working power closing signal are issued, and the PLC receives the power failure signal, and the diesel engine automatically starts; when the second working power is successfully closed, the PLC controls the diesel engine to exit operation; when the second working power fails to close, it immediately switches to the backup power circuit breaker, and the safety power supply is immediately powered by the energy storage system. After the diesel generator set is started and meets the first loading conditions, it switches from the backup power supply to the diesel engine power supply.
[0029] It should be noted that in the invention document of this patent, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one" do not exclude the existence of other identical elements in the process, method, article or device including the element. In the invention document of this patent, if it is mentioned that an action is performed according to an element, it means that the action is performed at least according to the element, which includes two situations: performing the action only according to the element, and performing the action according to the element and other elements. Expressions such as multiple, multiple, and multiple include 2, 2 times, 2 kinds, and more than 2, more than 2 times, and more than 2 kinds.
[0030] All documents mentioned in the present invention are considered to be included in the disclosure of the present invention as a whole, so that they can be used as the basis for modification when necessary. In addition, it should be understood that the above are only preferred embodiments of this specification and are not intended to limit the scope of protection of this specification. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of this specification should be included in the scope of protection of one or more embodiments of this specification.
Claims
1. A security power supply wiring scheme based on joint operation of fire and storage, characterized in that: The wiring scheme includes: a working power supply, a security power supply, a diesel generator set and an energy storage system. The energy storage system includes a PCS compartment and a battery compartment. The battery compartment is connected to the PCS compartment, and the PCS compartment is connected to the security power supply and the working power supply. The security power supply is connected to the working power supply and is configured with a security EMCC section; the working power supply includes a first working power supply and a second working power supply; the security EMCC section is configured to send a first working power supply tripping signal and a second working power supply closing signal after a 3-5 second delay when the security EMCC bus loses pressure, and the diesel engine starts automatically at the same time.
2. The safety power supply wiring scheme according to claim 1, characterized in that: The security EMCC section includes 4 incoming power supplies, 2 working power supplies, 1 standby power supply, and 1 diesel engine power supply.
3. The safety power supply wiring scheme according to claim 1, characterized in that: The wiring scheme is also equipped with circuit breakers, which include a first working power circuit breaker, a second working power circuit breaker and a standby power circuit breaker.
4. The safety power supply wiring scheme according to claim 3 is characterized in that The working power circuit breaker and the backup power circuit breaker are configured such that when the second power circuit breaker is closed successfully, the diesel generator set exits operation, and when the second working power circuit breaker fails to close, it immediately switches to the backup power circuit breaker.
5. The safety power supply wiring scheme according to claim 1, characterized in that: The wiring scheme is also configured with a PLC device, which is configured to be connected to the circuit breaker and control the start-up of the diesel generator set after receiving a power failure signal.
6. The safety power supply wiring scheme according to claim 1, characterized in that: The wiring scheme also includes a security PC section, and the security PC section is configured between the diesel generator set and the security EMCC section.