Hierarchical control system of high-voltage direct-hanging energy storage system and high-voltage direct-hanging energy storage system

Abstract

The utility model discloses a hierarchical control system of a high-voltage direct-hanging energy storage system and the high-voltage direct-hanging energy storage system. The hierarchical control system comprises a main controller, a split-phase controller and a unit controller, the main controller is connected with the split-phase controller through a high-speed communication optical fiber, and the split-phase controller is connected with the unit controller through a low-speed communication optical fiber. Through the exemplary embodiment, the number of equipment optical fibers is reduced, and the stability of long-distance communication is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage systems, in particular to a hierarchical control system of a high-voltage direct-hanging energy storage system and the high-voltage direct-hanging energy storage system. BACKGROUND

[0002] In large energy storage power stations, high-voltage cascaded energy storage systems based on cascaded H-bridge have high safety, high economy and high efficiency, and have been highly recognized by the market. Single-machine hundred-megawatt systems have become an important development direction of high-voltage cascaded energy storage systems.

[0003] With the continuous increase of energy storage single-machine power and battery capacity, the length of the communication optical fiber between the system controller and the energy storage unit increases exponentially and is of different lengths, which brings severe challenges to the stability of system control, field construction and cost control.

[0004] It should be noted that the statements herein only provide background information related to the present application and do not necessarily constitute the prior art. CONTENT OF THE UTILITY MODEL

[0005] In view of the above problems, the present application proposes a hierarchical control system of a high-voltage direct-hanging energy storage system and a high-voltage direct-hanging energy storage system to overcome the above problems or at least partially solve the above problems.

[0006] The embodiments of the present application adopt the following technical solutions:

[0007] In a first aspect, the embodiments of the present application provide a hierarchical control system of a high-voltage direct-hanging energy storage system, which comprises a master controller, a phase controller and a unit controller, the master controller is connected with the phase controller through a high-speed communication optical fiber, and the phase controller is connected with the unit controller through a low-speed communication optical fiber.

[0008] Preferably, the phase controller comprises N, the master controller is connected with N phase controllers through bidirectional high-speed communication optical fibers; each phase controller is connected with M unit controllers through bidirectional low-speed communication optical fibers, wherein N and M are integers greater than 1.

[0009] Preferably, the master controller comprises a first high-speed communication transceiver module, each phase controller comprises a second high-speed communication transceiver module, and the first high-speed communication transceiver module of the master controller is connected with the second high-speed communication transceiver module of N phase controllers through the bidirectional high-speed communication optical fiber.

[0010] Preferably, each of the phase-split controllers comprises a high-low speed communication conversion module, and the high-low speed communication conversion module of each of the phase-split controllers is connected with the M unit controllers through the bidirectional low speed communication optical fiber respectively. The main controller further comprises a control and state information processing module.

[0011] In a second aspect, the embodiments of the present application also provide a high-voltage direct-hanging energy storage system, which comprises the hierarchical control system according to any one of the first aspect.

[0012] The above at least one technical solution adopted by the embodiments of the present application can achieve the following beneficial effects:

[0013] The phase-split controller of the present disclosure realizes serial information interaction with the main controller through the high-speed communication optical fiber, and realizes conversion of high-speed serial to low-speed parallel protocol and information interaction with the energy storage unit. On the one hand, the stability problem of long-distance communication is solved, and on the other hand, the standardization of optical fiber length is realized, which greatly saves the cost of optical fiber system and reduces the difficulty of field construction.

[0014] The above description of the technical solutions of the present application is only a summary of the technical solutions of the present application. In order to enable the technical means of the present application to be more clearly understood, and to be implemented according to the content of the specification, and in order to enable the above and other purposes, features and advantages of the present application to be more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0015] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not meant to limit the present application. Moreover, the same reference numerals in the attached drawings refer to the same or similar components. In the drawings:

[0016] Figure 1 Fig. 1 is a schematic diagram of a hierarchical control system for a high-voltage direct-hanging energy storage system in the embodiments of the present application. DETAILED DESCRIPTION

[0017] In order to make the purposes, technical solutions and advantages of the present application more clear, the technical solutions of the present application will be described clearly and completely below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0018] The concept of the present application is that, in view of the high communication cost and poor stability of the high-voltage direct-hanging energy storage system in the prior art, a high-voltage direct-hanging energy storage system with strong universality is designed, and different transmission optical fibers are used according to the hierarchical control. The cost of optical fibers is saved, and the stability of the system is improved.

[0019] The technical solutions provided by the embodiments of the present application are described in detail below with reference to the drawings.

[0020] The present application provides a hierarchical control system of a high-voltage direct-hanging energy storage system and a high-voltage direct-hanging energy storage system, as shown in Figure 1 The hierarchical control system of the high-voltage direct-hanging energy storage system in the embodiments of the present application is provided. The hierarchical control system comprises a main controller M, a phase separation controller and a unit controller, the main controller is connected with the phase separation controller through high-speed communication optical fibers (L1-L N ), and the phase separation controller is connected with the unit controller through low-speed communication optical fibers (S1-S M ).

[0021] As shown in Figure 1 , the phase separation controller comprises N (C1-C N ), and the main controller is connected with the N phase separation controllers through bidirectional high-speed communication optical fibers; each phase separation controller is connected with M (D1-D M ) unit controllers through bidirectional low-speed communication optical fibers, wherein N and M are integers greater than 1.

[0022] In one example, the phase separation controller and the plurality of unit controllers connected therewith are called a prefabricated cabin, the phase separation controller in each prefabricated cabin realizes serial information interaction with the main controller through a pair of high-speed communication optical fibers, the phase separation controller in the prefabricated cabin realizes conversion of high-speed serial to low-speed parallel protocol, and realizes information interaction with the energy storage unit in the cabin.

[0023] In some embodiments, the main controller comprises a first high-speed communication transceiver module, each phase separation controller comprises a second high-speed communication transceiver module, and the first high-speed communication transceiver module of the main controller is connected with the second high-speed communication transceiver module of the N phase separation controllers through the bidirectional high-speed communication optical fibers. Each phase separation controller comprises a high-low speed communication conversion module, and the high-low speed communication conversion module of each phase separation controller is connected with the M unit controllers through the bidirectional low-speed communication optical fibers. The main controller further comprises a control and state information processing module. The unit controller comprises a PCS unit control module.

[0024] It can be understood that the optical fiber in the prefabricated cabin can be standardized in terms of various parameters including length, thereby saving the use cost of the optical fiber, reducing the construction difficulty, and improving the stability of the communication system.

[0025] With continued reference to Figure 1 , in the operation process of the hierarchical control system of the high-voltage direct-hanging energy storage system, the main controller M classifies and packages the control instructions of all units of the system according to the sub-phase controllers to which the units belong, forms N pieces of control information, denoted as sub-phase control information CXn, and receives the prefabricated cabin unit information HXn uploaded by the sub-phase controller Cn through the high-speed communication optical fiber Ln, and converts and disassembles the high-speed serial information into low-speed parallel information, where n = 1, 2…N, and N is the number of sub-phase controllers.

[0026] The sub-phase control information CXn is sent to the sub-phase controller Cn through the high-speed communication module in the main controller using the high-speed communication optical fiber Ln at a communication line rate of Gb / s, and the prefabricated cabin unit information HXn aggregated by the sub-phase controller Cn is sent to the main controller M through the high-speed communication module using the high-speed communication optical fiber Ln at a communication line rate of Gb / s, where n = 1, 2…N, and N is the number of sub-phase controllers.

[0027] The sub-phase controller Cn converts and disassembles the high-speed serial sub-phase control information CXn into low-speed serial unit control information DCm, and sends it to the unit controller Dm using the low-speed communication optical fiber Sm at a communication line rate of Mb / s, and receives the unit state information DSm uploaded by the unit controller Dm through the low-speed communication optical fiber Sm at a communication line rate of Mb / s, and splices the m unit state information to form the prefabricated cabin unit information HXn, where m = 1, 2…M, n = 1, 2…N, M is the number of unit controllers in the prefabricated cabin, and N is the number of sub-phase controllers.

[0028] Each unit controller Dm of each prefabricated cabin receives the low-speed serial information transmitted by the sub-phase controller Cn and converts it into a control signal for unit control, and uploads the unit state information DSm to the sub-phase controller Cn through the low-speed communication optical fiber Sm at a communication line rate of Mb / s, where m = 1, 2…M, n = 1, 2…N, M is the number of unit controllers in the prefabricated cabin, and N is the number of sub-phase controllers.

[0029] In one example, a 35kV 54-level high-voltage direct-hanging energy storage system is described, which has a total of 9 prefabricated cabins, and each prefabricated cabin has 18 energy storage units.

[0030] The main controller M classifies and packs the control instructions of all units of the system according to the sub-phase controllers to which the units belong, to form 9 pieces of control information, denoted as sub-phase control information CX1-CX9, and simultaneously receives the prefabricated cabin unit information HX1-HX9 uploaded by the sub-phase controllers C1-C9 through the high-speed communication optical fibers L1-L9, and converts and disassembles the high-speed serial information into low-speed parallel information.

[0031] The sub-phase control information CX1-CX9 is transmitted to the sub-phase controllers C1-C9 through the high-speed communication module in the main controller, using the high-speed communication optical fibers L1-L9, at a communication line rate of 2 Gb / s, and simultaneously, the prefabricated cabin unit information HX1-HX9 aggregated by the sub-phase controllers C1-C9 is transmitted to the main controller M through the high-speed communication module, using the high-speed communication optical fibers L1-L9, at a communication line rate of 2 Gb / s.

[0032] The sub-phase controllers C1-C9 convert and disassemble the high-speed serial sub-phase control information CX1-CX9 into low-speed serial unit control information DC1-DC18, and transmit the unit control information to the unit controllers D1-D18 through the low-speed communication optical fibers S1-S18 at a communication line rate of 1.25 Mb / s, and simultaneously receive the unit state information DS1-DS18 uploaded by the unit controllers D1-D18 through the low-speed communication optical fibers S1-S18 at a communication line rate of 1.25 Mb / s, and splice the 18 pieces of unit state information to form the prefabricated cabin unit information HX1-HX9.

[0033] Each unit controller D1-D18 in each prefabricated cabin receives the low-speed serial information transmitted by the sub-phase controllers C1-C9, and converts the information into control signals for unit control, and simultaneously uploads the unit state information DS1-DS18 to the sub-phase controllers C1-C9 through the low-speed communication optical fibers S1-S18 at a communication line rate of 1.25 Mb / s.

[0034] It can be understood that the example embodiment takes the energy storage prefabricated cabin as a basic unit, the sub-phase controllers in each prefabricated cabin realize serial information interaction with the main controller through a pair of high-speed communication optical fibers, the sub-phase controllers in the prefabricated cabin realize conversion of the high-speed serial to low-speed parallel protocol, and realize information interaction with the energy storage units in the cabin. On the one hand, the stability problem of long-distance communication is solved, and on the other hand, the length of the optical fiber in the prefabricated cabin is standardized, which greatly saves the cost of the optical fiber system and reduces the difficulty of on-site construction.

[0035] The example embodiment also provides a high-voltage direct-hanging energy storage system, which comprises the hierarchical control system as described above. For other parts of the high-voltage direct-hanging energy storage system, please refer to the prior art, and the disclosure will not be repeated.

[0036] It should be noted that, in the description of the present application, the terms "first", "second", etc. are used only for descriptive purposes and are not to be construed as indicating or implying relative importance. In addition, in the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified and limited.

[0037] In the present application, unless specifically defined and limited otherwise, the terms "mounting", "connecting", "connecting", "fixing" and the like should be broadly understood, for example, can be fixed connection, or detachable connection, or integrated; can be mechanical connection, or electrical connection or communication with each other; can be directly connected, or indirectly connected through intermediate media, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] In the present application, unless specifically defined and limited otherwise, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0039] Any process or method descriptions in flow charts or otherwise described herein can be understood as representing code modules, segments, or portions of code that include one or more executable instructions for implementing specific logic functions or other processes, and the various embodiments of the present application include additional implementations in which the functions described with reference to the figures are implemented in different orders, in different ways, or with different structures, as will occur to those skilled in the art. The scope of the present application is not limited to the described embodiments.

[0040] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0041] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary, and are not to be interpreted as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A hierarchical control system for a high voltage direct mount energy storage system, the hierarchical control system comprising: The hierarchical control system comprises: a main controller, a phase controller and a unit controller, the main controller is connected with the phase controller through high-speed communication optical fiber, and the phase controller is connected with the unit controller through low-speed communication optical fiber.

2. The hierarchical control system of claim 1, wherein, The phase controller comprises N, and the main controller is connected with N phase controllers through bidirectional high-speed communication optical fiber. Each phase controller is connected with M unit controllers through bidirectional low-speed communication optical fiber, wherein N and M are integers greater than 1.

3. The hierarchical control system of claim 2, wherein, The main controller comprises a first high-speed communication transceiver module, and each phase controller comprises a second high-speed communication transceiver module, the first high-speed communication transceiver module of the main controller is connected with the second high-speed communication transceiver module of N phase controllers through bidirectional high-speed communication optical fiber.

4. The hierarchical control system of claim 3, wherein, Each phase controller comprises a high-low speed communication conversion module, the high-low speed communication conversion module of each phase controller is connected with M unit controllers through bidirectional low-speed communication optical fiber.

5. The hierarchical control system of any of claims 1-4, wherein, The main controller further comprises a control and state information processing module.

6. The hierarchical control system of claim 5, wherein, The unit controller comprises a PCS unit control module.

7. A high voltage direct mount energy storage system characterized by, The high-voltage direct-hanging energy storage system comprises the hierarchical control system according to any one of claims 1-6.

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