Bus-based energy storage power station energy coordination control method and system

Abstract

The invention discloses a bus-based energy storage power station energy coordination control method and system. The method comprises the following steps: step 1, a control host receives an instruction of a quick response demand or detects the quick response demand; step 2, based on the instruction or the response demand received in the step 1, the control host calculates the target active power of each PCS; 3, the control host transmits the target active power, calculated in the step 2, of the single PCS to a local coordination controller through a real-time Ethernet network; and step 4, each local coordination controller sends the PCS target active power received in the step 3 to the corresponding PCS through a communication bus, clock synchronization is carried out among the local coordination controllers, and each local coordination controller provides a clock synchronization signal for the corresponding PCS. According to the invention, the output synchronism of all PCSs during quick response is ensured, and the minimum circulating current can be realized under the condition that all PCSs realize synchronous response.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy storage power station control, and in particular relates to a bus-based energy storage power station energy coordination control system and method. Background Art

[0002] Energy storage technology is an important component of the future smart grid, involving all major links of its construction. The significance of developing energy storage technology includes peak shaving and valley filling, regulating energy, improving the efficiency of the power grid system, and ensuring the safety of the power grid system. At the same time, the use of energy storage technology can make up for the randomness and volatility of renewable energy power generation, and realize the smooth output of renewable energy power generation, so that large-scale wind power and solar power generation can be more safely and reliably integrated into the conventional power grid. With the further development of new energy stations, the role of electrochemical energy storage has been further highlighted, and the application and development of large-scale energy storage technology will have a revolutionary impact on the entire new energy field. As the scale of electrochemical energy storage in new energy stations becomes larger and larger, the control requirements for energy storage systems are also getting higher and higher, but the current control of the rapid response consistency of energy storage still has disadvantages, and there is still room for improvement.

[0003] The prior art discloses the energy storage station power coordination control system architecture (CN110460154A), which consists of a monitoring system, a coordination controller, a power storage converter (PCS), a battery management system (BMS), and a local area network formed by a switch. The monitoring system can receive remote dispatching AGC and AVC instructions, calculate the power adjustment amount of each PCS, and can directly adjust the PCS on the human-machine interface, and send the PCS adjustment amount to the coordination controller through the MMS adjustment instruction. After receiving the MMS adjustment instruction of the monitoring system, the coordination controller directly converts it into a GOOSE adjustment instruction and sends it to the corresponding PCS; it can also perform on-site transient power adjustment, directly collect the voltage and current values ​​of the grid connection point, calculate the power adjustment amount of each PCS through the fluctuations of the grid voltage and frequency, and then send it to the corresponding PCS through the GOOSE adjustment instruction. The on-site transient power adjustment priority of the coordination controller is higher than the MMS instruction of the monitoring background.

[0004] Existing technologies or patents have solved the problem of fast power command transmission of multiple PCS (Power Conversion System). However, due to communication delays and discreteness of devices, as well as the fact that the adopted communication protocol does not include synchronization functions, control commands cannot be synchronized when multiple PCS are running in parallel, and the power output synchronization is poor. In addition, the communication protocols adopted by the existing technologies all randomly send status information to the control system (coordination controller or EMS). As the scale of a single energy storage system becomes larger and larger, when the number of PCS exceeds a certain number, it will greatly affect the control system performance and transmission reliability. Summary of the invention

[0005] The purpose of the present invention is to provide a bus-based energy storage power station energy coordination control system to solve the problem of output consistency of multiple PCSs in large-scale new energy stations under fast response conditions.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A first aspect of the present invention provides a bus-based energy storage power station energy coordination control method, comprising:

[0008] Step 1, the control host receives an instruction of a quick response requirement or detects a quick response requirement;

[0009] Step 2, based on the command or response requirement received in step 1, the control host calculates the target active power of each PCS;

[0010] Step 3, the control host transmits the single PCS target active power calculated in step 2 to the local coordination controller through the real-time Ethernet network;

[0011] Step 4, each local coordination controller sends the PCS target active power received in step 3 to the corresponding PCS through the communication bus, and the clocks of each local coordination controller are synchronized, and each local coordination controller provides a clock synchronization signal to the corresponding PCS.

[0012] Preferably, in step 2, the target active power calculation formula of each PCS is as follows:

[0013]

[0014] Among them, P i is the target active output of a single PCS; P total is the total active power adjustment instruction; P maxi is the maximum active power of the i-th PCS discharge / charge; μ i is the charging / discharging active power coefficient; θ i is the enabling factor, and n is the number of PCSs.

[0015] Preferably, when the PCS or battery fails, θ i =0;

[0016] PCS and battery are normal. When the corresponding battery SOC>80% during charging, θ i =0, when the corresponding battery SOC is less than 20% during discharge, θ i =0;

[0017] Other casesθ i =1.

[0018] The second aspect of the present invention provides a bus-based energy storage power station energy coordination control system, comprising:

[0019] Control host, local coordination controller, real-time Ethernet, communication bus and PCS;

[0020] The control host is connected to the dispatching end, the primary frequency modulation end and the local coordination controller through real-time Ethernet, and the local coordination controller is connected to the PCS through a communication bus.

[0021] Preferably, the control host and the local coordination controller are both dual-machine dual-ring network structures.

[0022] Preferably, the communication bus includes a CAN bus and / or an RS485 bus.

[0023] Preferably, the local coordination controller includes a synchronization pulse generator, a real-time power calculation unit and a real-time Ethernet communication bus interface;

[0024] The synchronization pulse generator is connected to the PCS via a low-latency pulse signal to provide synchronization control pulses;

[0025] The real-time power calculation unit is used to collect the PCS output voltage and current values ​​on-site and calculate the real-time active and reactive output of the PCS;

[0026] The real-time Ethernet communication bus interface is connected to the control host via real-time Ethernet.

[0027] A third aspect of the present invention provides a bus-type communication method, based on the control system of the above-mentioned bus-type energy storage power station energy coordination control system, comprising:

[0028] Step 1, with T as a period, the control host sends a real-time Ethernet communication message frame, and the data part of the real-time Ethernet communication message frame includes a PCS control field and a PCS information field;

[0029] Step 2, after receiving the communication message frame sent in step 1, the local coordination controller corresponding to the first PCS decodes the control field information belonging to the PCS in the control field, writes the information of the PCS into the corresponding position of the information field of the communication message frame, and outputs the processed communication message frame;

[0030] Step 3, the communication message frame outputted in step 2 is sent to the local coordination controller corresponding to the next PCS, and the local coordination controller corresponding to the next PCS repeats the operation of the local coordination controller corresponding to the first PCS in step 2, until the local coordination controller corresponding to the last PCS outputs the processed communication message frame, and returns the communication message frame to the control host, and the local coordination controllers corresponding to each PCS perform clock synchronization in the process of receiving and outputting the communication message frame;

[0031] Step 4: The control host parses the communication message frame returned in step 3 to obtain the status information of each PCS.

[0032] A fourth aspect of the present invention provides a terminal, including a processor and a storage medium;

[0033] The storage medium is used to store instructions;

[0034] The processor is used to operate according to the instructions to execute the steps according to the above method.

[0035] A fifth aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon.

[0036] When the program is executed by a processor, the steps of the above method are implemented.

[0037] The beneficial effects of the present invention are:

[0038] (1) The energy coordination control system based on the bus-type energy storage power station provided by the present invention ensures the synchronization of the output of all PCSs during rapid response. At the same time, when all PCSs achieve synchronous response, the minimum circulation can be achieved, and the entire station can realize functions such as network control and black start.

[0039] (2) The control host in the present invention can form multiple independent communication networks with the local coordination controller through multiple real-time Ethernet communication bus interfaces, which can meet the needs of layered and line control of the PCS of a large-capacity energy storage station, flexibly expand the control quantity of the PCS, and broaden the application scenarios of the present invention.

[0040] (3) The energy coordination control system based on the bus-type energy storage power station provided by the present invention does not need to read the active / reactive power of each PCS through communication with the PCS, but the local coordination controller directly calculates the real-time power output of the PCS. Therefore, when the control host issues a PCS output instruction from top to bottom, the PCS can respond quickly, which greatly improves the response speed of the entire system.

[0041] (4) In the bus-based energy storage power station energy coordination control system provided by the present invention, the local coordination controller and the control host communicate and transmit control instructions and status information via a real-time Ethernet bus. All PCS status information and control instructions on the bus only require one Ethernet communication message frame to complete, without the need for the local coordination controller and control host corresponding to each PCS to send and receive messages separately, which greatly reduces the number of communication messages in the network and improves communication efficiency and the rapid response speed of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1It is a system structure diagram of the bus-based energy storage power station energy coordination control system in the present invention;

[0043] Figure 2 It is a schematic diagram of the communication between the coordination controller and the PCS in the present invention;

[0044] Figure 3 It is a flow chart of the control instruction issuance in the present invention.

[0045] Figure 4 It is a schematic diagram of the interaction of control instructions and status information between the control host and the local coordination controller in the present invention. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical scheme and advantages of the present invention clearer, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The embodiments described in this application are only embodiments of a part of the present invention, rather than all embodiments. Based on the spirit of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the protection scope of the present invention.

[0047] The existing energy storage power station energy coordination control system is mainly used in fast response scenarios such as primary frequency regulation, inertia, etc., but the number of PCS accesses is determined by the control system CPU performance, and there are certain limitations. When the number of PCS accesses exceeds a certain number, the existing system can no longer meet the requirements. For large energy storage power stations, the coordinated control of PCS has become an indispensable part, so the embodiment of the present invention proposes the following technical solutions:

[0048] The embodiment of the present invention provides a control method of a bus-based energy storage power station energy coordination control system, comprising:

[0049] Step 1, the control host receives an instruction of a quick response requirement or detects a quick response requirement;

[0050] like Figure 3 As shown, when a new energy power station using chemical energy storage has an event that requires a quick response, such as the primary frequency regulation equipment detecting a change in the grid frequency and needing to adjust the power output of the energy storage to achieve the purpose of frequency regulation, the primary frequency regulation equipment sends the power value instruction that needs to be adjusted to the control host.

[0051] Step 2, based on the command or response requirement received in step 1, the control host calculates the target active power of each PCS;

[0052] The control host obtains the total battery SOC of each container and the PCS maximum charging / discharging active power P according to the received command value and PCS and BMS (Battery Management System) information. maxi , thereby calculating the target active power of each PCS.

[0053] In a preferred but non-limiting embodiment of the present invention, the control host directly reads the information of PCS and BMS from the local coordination controller. The PCS itself does not need to calculate the active / reactive power. The local coordination controller obtains the real-time information of PCS and calculates the active / reactive power, thereby improving the response speed of the entire control system.

[0054] However, in order to balance the battery life of the entire station, the control host needs to set an active power coefficient for each PCS to balance the output of each PCS. This active power coefficient is related to the SOH of the battery.

[0055] The PCS target active power calculation formula is as follows:

[0056]

[0057] Among them, P i Target active output for a single PCS;

[0058] P total It is the total active power adjustment instruction;

[0059] P maxi The maximum active power for discharging / charging the i-th PCS;

[0060] μ i is the charge / discharge active power coefficient, μ i The value range is 0-100%;

[0061] θ i is the enabling factor;

[0062] n is the number of PCS. When the PCS or battery fails, θ i =0; PCS and battery are normal. When the corresponding battery SOC>80% during charging, θ i =0; when the corresponding battery SOC is less than 20% during discharge, θ i =0; other casesθ i =1.

[0063] The above parameters can be adjusted according to specific circumstances.

[0064] Step 3, the control host transmits the single PCS target active power calculated in step 2 to the local coordination controller through the real-time Ethernet network;

[0065] The target active power of a single PCS calculated by the control host and sent to each PCS is sent to the local coordination controller corresponding to each PCS through the real-time Ethernet network.

[0066] In step 4, each local coordination controller sends the PCS target active power received in step 3 to the corresponding PCS through the communication bus. The clocks of the local coordination controllers are synchronized, and each local coordination controller provides a clock synchronization signal to the corresponding PCS to ensure that all PCSs output at the same time and ensure the synchronization stability of the power supply output.

[0067] In a preferred but non-limiting embodiment of the present invention, the communication bus includes a CAN bus and / or an RS485 bus.

[0068] According to the characteristics of real-time Ethernet and the setting of clock synchronization signals, the real-time Ethernet system can ensure that the time difference between the synchronization signal sent by each local coordination controller to the PCS is at the nanosecond level. The time difference between the first local coordination controller sending the command value to its corresponding PCS in the entire network and the last local coordination controller sending the command value to its corresponding PCS in the entire network is at the microsecond level. This ensures the output synchronization of the PCS of the entire new energy station in rapid response situations.

[0069] At the same time, the entire network uses clock synchronization technology, which can flexibly perform layered and line control when controlling a large number of PCSs. Control consistency is not affected by network scale and layering.

[0070] The energy coordination control system based on bus-type energy storage power station provided by the present invention does not need to read the active / reactive power of each PCS through communication with the PCS, but directly calculates the real-time power output of the PCS by the local coordination controller. Therefore, when the control host issues a PCS output instruction from top to bottom, the PCS can respond quickly, which greatly improves the response speed of the entire system.

[0071] like Figure 1 As shown, the embodiment of the present invention also provides a bus-based energy storage power station energy coordination control system, including a control host, an on-site coordination controller, a real-time Ethernet, a communication bus and a PCS. The control host is connected to the AGC / AVC port and the primary frequency modulation port of the dispatching end through a real-time Ethernet, and is connected to the on-site coordination controller through a real-time Ethernet; the on-site coordination controller is connected to the PCS through a communication bus. Both the control host and the on-site coordination controller adopt a dual-machine dual-ring network redundancy setting, which can achieve both equipment redundancy and communication redundancy.

[0072] Real-time Ethernet uses high-precision network timing technology to ensure that each local coordination controller maintains clock synchronization with the control host, ensuring that the difference in synchronization pulses sent to the PCS is at the nanosecond level; at the same time, the time difference between the instructions output by the first local coordination controller to the PCS and the instructions output by the last local coordination controller to the PCS at the same time in the entire system is at the microsecond level, thus ensuring the consistency of the output of the entire new energy station PCS in rapid response situations.

[0073] like Figure 2 As shown, the local coordination controller provided by the embodiment of the present invention includes a synchronous pulse generator, a real-time power calculation unit and a real-time Ethernet communication bus interface. The synchronous pulse generator is connected to the PCS through a low-latency pulse signal to provide a synchronous control pulse; the real-time power calculation unit is used to collect the output voltage and current values ​​of the PCS on-site, and calculate the real-time active and reactive output of the PCS with a period of 20ms when the system is 50Hz; the real-time Ethernet communication bus interface is connected to the control host through real-time Ethernet.

[0074] The local coordination controller pre-sets the appropriate time through the control host to ensure that all local coordination controllers connected to the host receive the control command and transmit it to the PCS within each control command cycle, and then send out a synchronous control pulse through the synchronous pulse generator.

[0075] The PCS receives and parses the control instructions from the local coordination controller connected to it, and finally triggers the adjustment of the power module through the synchronization pulse to ensure that all PCSs can output at the same time.

[0076] In a preferred but non-limiting embodiment of the present invention, the local coordination controller is connected to the PCS via a communication bus, and the communication bus includes a CAN bus and / or an RS485 bus.

[0077] The local coordination controller is connected to the local coordination controller of the next PCS warehouse through two real-time Ethernets. The local coordination controller and the control host together constitute the real-time Ethernet system of the entire energy storage power station.

[0078] The control host obtains PCS real-time power output and BMS information from the local coordination controller through real-time Ethernet. The information obtained is as follows: PCS active power, PCS reactive power, PCS status, PCS real-time maximum dischargeable active power, PCS real-time maximum chargeable active power, PCS real-time maximum generateable reactive power, battery SOC status and battery SOH status.

[0079] The PCS status includes stop, run, and fault.

[0080] The embodiment of the present invention adopts synchronous clock and dual-ring network communication redundancy to achieve PCS power synchronous output regardless of network level and scale. Secondly, the local coordination controller is used to calculate the output of each PCS in real time, without relying on the on-site PCS power feedback value, to achieve rapid control of each PCS and improve the rapid response speed of the entire system.

[0081] In the embodiment of the present invention, the local coordination controller adopts a CAN bus isolation chip, and the long-distance communication real-time Ethernet adopts an optical fiber medium, thereby improving the anti-interference ability and system stability of the system.

[0082] like Figure 4 As shown, an embodiment of the present invention further provides a bus-type communication method, which is intended to reduce the communication messages sent for PCS status information in a large-scale energy storage control station.

[0083] Step 1, with T as the period, the control host sends the real-time Ethernet communication message frame, the data part of the real-time Ethernet communication message frame includes a control field and an information field, the control field of each PCS includes: control enable, active power, reactive power; the information feedback field of each PCS includes: PCS active power, PCS reactive power, PCS status, PCS real-time maximum active power that can be released, PCS real-time maximum active power that can be charged, PCS real-time maximum reactive power that can be transmitted, battery SOC status and battery SOH status.

[0084] The PCS status includes stop, run and fault.

[0085] Step 2, after the local coordination controller corresponding to the first PCS receives the communication message frame sent in step 1, it decodes the control field information belonging to this PCS in the control field, and writes the information of this PCS into the corresponding position of the information field of the communication message frame, and outputs the processed communication message frame.

[0086] Step 3, the communication message frame outputted in step 2 is sent to the local coordination controller corresponding to the next PCS, and the local coordination controller corresponding to the next PCS repeats the operation of the local coordination controller corresponding to the first PCS in step 2, until the local coordination controller corresponding to the last PCS outputs the processed communication message frame, and returns the communication message frame to the control host, and the local coordination controllers corresponding to each PCS perform clock synchronization in the process of receiving and outputting the communication message frame. The control host sends a communication message frame once, issues a command to control all PCSs, and receives information from all PCSs at the same time, thereby improving communication efficiency.

[0087] Step 4: The control host parses the communication message frame returned in step 3 to obtain the status information of each PCS.

[0088] In a preferred but non-limiting embodiment of the present invention, the above process only requires one real-time Ethernet frame to complete the control of 50 PCSs and the reception of PCS status information. The processing of communication messages by the local coordination controller corresponding to each PCS can be completed in FPGA (Field Programmable Gate Array), and the processing time of one communication node is less than 1us.

[0089] The present disclosure may be a system, a method and / or a computer program product. The computer program product may include a computer-readable storage medium carrying computer-readable program instructions for causing a processor to implement various aspects of the present disclosure.

[0090] A computer-readable storage medium may be a tangible device that can hold and store instructions used by an instruction execution device. A computer-readable storage medium may be, for example, but not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing. More specific examples of computer-readable storage media (a non-exhaustive list) include: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a static random access memory (SRAM), a portable compact disk read-only memory (CD-ROM), a digital versatile disk (DVD), a memory stick, a floppy disk, a mechanical encoding device, such as a punch card or a raised structure in a groove on which instructions are stored, and any suitable combination of the foregoing. As used herein, a computer-readable storage medium is not to be interpreted as a transient signal per se, such as a radio wave or other freely propagating electromagnetic wave, an electromagnetic wave propagating through a waveguide or other transmission medium (e.g., a light pulse through a fiber optic cable), or an electrical signal transmitted through a wire.

[0091] The computer-readable program instructions described herein can be downloaded from a computer-readable storage medium to each computing / processing device, or downloaded to an external computer or external storage device via a network, such as the Internet, a local area network, a wide area network, and / or a wireless network. The network can include copper transmission cables, optical fiber transmissions, wireless transmissions, routers, firewalls, switches, gateway computers, and / or edge servers. The network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in the computer-readable storage medium in each computing / processing device.

[0092] The computer program instructions for performing the operation of the present disclosure may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages, such as Smalltalk, C++, etc., and conventional procedural programming languages, such as "C" language or similar programming languages. Computer-readable program instructions may be executed completely on a user's computer, partially on a user's computer, as an independent software package, partially on a user's computer, partially on a remote computer, or completely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., using an Internet service provider to connect via the Internet). In some embodiments, an electronic circuit, such as a programmable logic circuit, a field programmable gate array (FPGA), or a programmable logic array (PLA), may be customized by utilizing the state information of the computer-readable program instructions, and the electronic circuit may execute the computer-readable program instructions, thereby realizing various aspects of the present disclosure.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents, and any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A bus-based energy storage power station energy coordination control method, characterized in that: include: Step 1, the control host receives an instruction of a quick response requirement or detects a quick response requirement; Step 2, based on the command or response requirement received in step 1, the control host calculates the target active power of each PCS; Step 3, the control host transmits the single PCS target active power calculated in step 2 to the local coordination controller through the real-time Ethernet network; Step 4, each local coordination controller sends the PCS target active power received in step 3 to the corresponding PCS through the communication bus, and the clocks of each local coordination controller are synchronized, and each local coordination controller provides a clock synchronization signal to the corresponding PCS.

2. The energy coordination control method of a bus-based energy storage power station according to claim 1 is characterized in that: In step 2, the target active power calculation formula for each PCS is as follows: Among them, P i is the target active output of a single PCS; P total is the total active power adjustment instruction; P maxi is the maximum active power of discharge / charge of the i-th PCS; μ i is the charging / discharging active power coefficient; θ i is the enabling factor, and n is the number of PCSs.

3. The energy coordination control method of a bus-based energy storage power station according to claim 2 is characterized in that: When the PCS or battery fails, θ i =0; PCS and battery are normal. When the corresponding battery SOC>80% during charging, θ i =0, when the corresponding battery SOC is less than 20% during discharge, θ i =0; Other casesθ i =1.

4. A bus-based energy storage power station energy coordination control system, characterized in that: include: Control host, local coordination controller, real-time Ethernet, communication bus and PCS; The control host is connected to the dispatching end, the primary frequency modulation end and the local coordination controller through real-time Ethernet, and the local coordination controller is connected to the PCS through a communication bus.

5. The control system of the bus-type energy storage power station energy coordination control system according to claim 4 is characterized in that: Both the control host and the local coordination controller are dual-machine dual-ring network structures.

6. The control system of the bus-type energy storage power station energy coordination control system according to claim 4 is characterized in that: The communication bus includes a CAN bus and / or an RS485 bus.

7. The control system of the bus-type energy storage power station energy coordination control system according to claim 4 is characterized in that: The local coordination controller includes a synchronization pulse generator, a real-time power calculation unit and a real-time Ethernet communication bus interface; The synchronization pulse generator is connected to the PCS via a low-latency pulse signal to provide synchronization control pulses; The real-time power calculation unit is used to collect the PCS output voltage and current values ​​on-site and calculate the real-time active and reactive output of the PCS; The real-time Ethernet communication bus interface is connected to the control host via real-time Ethernet.

8. A bus-type communication method, based on the control system of the bus-type energy storage power station energy coordination control system according to any one of claims 4 to 7, characterized in that: include: Step 1, with T as a period, the control host sends a real-time Ethernet communication message frame, and the data part of the real-time Ethernet communication message frame includes a PCS control field and a PCS information field; Step 2, after receiving the communication message frame sent in step 1, the local coordination controller corresponding to the first PCS decodes the control field information belonging to the PCS in the control field, writes the information of the PCS into the corresponding position of the information field of the communication message frame, and outputs the processed communication message frame; Step 3, the communication message frame outputted in step 2 is sent to the local coordination controller corresponding to the next PCS, and the local coordination controller corresponding to the next PCS repeats the operation of the local coordination controller corresponding to the first PCS in step 2, until the local coordination controller corresponding to the last PCS outputs the processed communication message frame, and returns the communication message frame to the control host, and the local coordination controllers corresponding to each PCS perform clock synchronization in the process of receiving and outputting the communication message frame; Step 4: The control host parses the communication message frame returned in step 3 to obtain the status information of each PCS.

9. A terminal comprising a processor and a storage medium; characterized in that: The storage medium is used to store instructions; The processor is configured to operate according to the instructions to execute the steps of the method according to any one of claims 1-3.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method according to any one of claims 1 to 3 are implemented.

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