New energy station and control system thereof

Abstract

The invention provides a new energy station and a control system thereof. The control system comprises a station master controller, M relay board cards, and power supply controllers of power supply devices on feeder lines in the new energy station. At least part of the M relay board cards are in communication connection with the station master controller, and the relay board cards which are not in communication connection with the station master controller are in communication connection with other relay board cards; each feeder line corresponds to one relay board card, the first power supply controller in the Ni power supply controllers in the ith feeder line is in communication connection with the relay board card corresponding to the ith feeder line, and the jth power supply controller is in communication connection with the (j-1) th power supply controller; the Ni power controllers in the ith feeder line comprise the power controllers of the power devices on the ith feeder line, i is an integer larger than 0 and not larger than the total number of the feeder lines, Ni is an integer larger than 1, and j is an integer larger than 1 and not larger than Ni.

Description

Technical Field

[0001] The present disclosure generally relates to the field of new energy technology, and more specifically, to a new energy station and a control system thereof. Background Art

[0002] In terms of new energy field control, the deployed control system is often arbitrary in physical location. For example, the number of devices that make up the control system and the distance between them are uncontrollable factors. Due to the large number of devices in the new energy field control system and the arbitrariness of the location layout, the existing field communication mechanism cannot achieve the synchronization of the field control system, nor can it use the existing communication mechanism to directly establish a suitable field synchronization control system with high real-time performance. Summary of the invention

[0003] An exemplary embodiment of the present disclosure provides a new energy station and a control system thereof, and proposes a communication network topology of the new energy station control system that facilitates synchronization of the station system.

[0004] According to a first aspect of an embodiment of the present disclosure, a control system for a new energy station is provided, the control system comprising: a station master controller, M relay boards, and power controllers for each power supply device on each feeder in the new energy station; at least some of the M relay boards are communicatively connected to the station master controller, and relay boards that are not communicatively connected to the station master controller are communicatively connected to other relay boards; each feeder corresponds to a relay board, and N relay boards in the i-th feeder correspond to each other. i The first power supply controller among the N power supply controllers is connected to the relay board corresponding to the i-th feeder line for communication. i The j-th power supply controller among the power supply controllers is connected to the j-1-th power supply controller in communication; wherein the N in the i-th feeder i The power supply controllers include: each power supply controller of each power supply device on the i-th feeder, M is an integer greater than 0, i is an integer greater than 0 and not greater than the total number of feeders, N i is an integer greater than 1, j is greater than 1 and not greater than N i An integer.

[0005] According to a second aspect of an embodiment of the present disclosure, a new energy station is provided, wherein the new energy station includes the control system as described above.

[0006] According to the new energy station and its control system of the exemplary embodiment of the present disclosure, a communication network topology of the new energy station control system is proposed to facilitate the synchronization of the station system. Through this communication network topology, the new energy station control system can establish clock synchronization for the entire field, so that the control system has high synchronization accuracy and is not affected by physical link conditions within the range of the new energy station. At the same time, it is feasible to provide synchronization technology implementation for refined control of the new energy station.

[0007] In the following description, some aspects and / or advantages of the general inventive concept will be set forth, and some other aspects and / or advantages will be known through the following description or the implementation of the general inventive concept. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] These and / or other aspects and advantages of the present application will become clearer and easier to understand from the following detailed description of the embodiments of the present application in conjunction with the accompanying drawings, in which:

[0009] Figure 1 A schematic diagram showing the layout of a new energy station according to an exemplary embodiment of the present disclosure;

[0010] Figure 2 A schematic diagram showing the structure of a control system of a new energy station according to an exemplary embodiment of the present disclosure;

[0011] Figure 3 and Figure 4 A schematic diagram showing physical connections of a control system of a new energy station according to an exemplary embodiment of the present disclosure is shown;

[0012] Figure 5 A schematic diagram showing a ring network communication of a power supply controller within a feeder according to an exemplary embodiment of the present disclosure is shown;

[0013] Figure 6 A schematic diagram showing hierarchical clock timing synchronization according to an exemplary embodiment of the present disclosure;

[0014] Figure 7 A schematic diagram showing clock timing synchronization between a master controller and a relay board according to an exemplary embodiment of the present disclosure is shown;

[0015] Figure 8 A schematic diagram of clock timing synchronization between a relay board and a power supply controller in a feeder according to an exemplary embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0016] Reference will now be made in detail to the embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like parts throughout. The embodiments will be described below with reference to the drawings in order to explain the present disclosure.

[0017] It should be noted that the terms "first", "second", etc. in the specification and claims of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0018] It should be noted that the phrase "at least one of the items" in the present disclosure includes three types of parallel situations: "any one of the items", "a combination of any number of the items", and "all of the items". For example, "including at least one of A and B" includes the following three parallel situations: (1) including A; (2) including B; (3) including A and B. Another example is "executing at least one of step 1 and step 2" which means the following three parallel situations: (1) executing step 1; (2) executing step 2; (3) executing step 1 and step 2.

[0019] Figure 1 A schematic diagram showing the layout of a new energy station according to an exemplary embodiment of the present disclosure is shown.

[0020] Reference Figure 1 There are one or more parallel feeders in the new energy station. After all the feeders are converged, they are connected to the substation of the new energy station. Multiple power supply devices are connected to each feeder. Specifically, the power supply device on each feeder is connected to one side of the corresponding transformer via the power electronic converter of the power supply device, and the other side of the corresponding transformer is connected to the feeder.

[0021] It should be understood that the length of each feeder, the number of power devices on each feeder, and the distance between adjacent power devices on each feeder can be deployed according to the actual situation and specific needs within the new energy site, and the specific deployment of different feeders may be different.

[0022] As an example, the type of power supply equipment may include but is not limited to at least one of the following items: new energy power generation equipment, energy storage device, it should be understood that other types may also be included, and the present disclosure does not limit this. For example, new energy power generation equipment may include but is not limited to at least one of the following items: wind turbine generator set, photovoltaic module.

[0023] As an example, each power supply device may include one or more power supply controllers. Figure 1Only an example in which each power supply device includes one power supply controller is shown. In fact, a single power supply device may also include multiple power supply controllers.

[0024] As an example, the power supply controller of the power supply device may include: a controller of a power electronic converter of the power supply device.

[0025] As an example, the type of power electronic converter may include but is not limited to at least one of the following items: a converter, an inverter, and a frequency converter. It should be understood that other types may also be included, and the present disclosure is not limited thereto.

[0026] Figure 2 A schematic structural diagram of a control system of a new energy station according to an exemplary embodiment of the present disclosure is shown.

[0027] like Figure 2 As shown, the control system of the new energy station according to the exemplary embodiment of the present disclosure may include: a station master controller 100, M relay boards 200, and a power controller 300 for each power supply device on P feeder lines. M is an integer greater than 0, and P is an integer greater than 0.

[0028] Specifically, at least some of the M relay boards 200 are connected to the station master controller 100 for communication, and the relay boards 200 that are not connected to the station master controller 100 for communication are connected to other relay boards 200 for communication. The specific connection method of the M relay boards 200 can be deployed according to the grid-connected capacity of the new energy station and the number of power supply devices. Figure 3 and Figure 4 The following is a description which will not be expanded here.

[0029] Each feeder line corresponds to a relay board 200, and each relay board 200 corresponds to at least one feeder line. It should be understood that Figure 2 Only an example is shown in which each relay board 200 corresponds to one feeder. Different feeders may correspond to the same relay board 200, but different relay boards 200 correspond to different feeders.

[0030] N in the i-th feeder i The first power controller 300 of the power controllers 300 is connected to the relay board 200 corresponding to the i-th feeder line for communication. i The jth power controller 300 among the N power controllers 300 is connected to the N i The j-1th power supply controller 300 among the power supply controllers 300 is in communication connection. i The power supply controller 300 includes: each power supply controller 300 of each power supply device on the i-th feeder, i is an integer greater than 0 and not greater than the total number of feeders P, Ni is an integer greater than 1, j is greater than 1 and not greater than N i An integer.

[0031] It should be understood that Figure 2 Only an exemplary embodiment in which the total number of feeder lines P is equal to the total number of relay boards 200 M is shown. In fact, the total number of feeder lines P may also be greater than M. In this case, at least one relay board 200 among the M relay boards 200 will correspond to multiple feeder lines.

[0032] According to an exemplary embodiment of the present disclosure, a station-level master controller (i.e., station master controller 100) is set as the synchronous control center of the entire control system, and a relay board 200 is set as a controller to be serially connected hand in hand with all power controllers 300 in a single feeder, and the relay board 200 and the station master controller 100 are connected at the same time. The station master controller 100, all relay boards 200, and all power controllers 300 of the station constitute the entire station-level communication network system.

[0033] Figure 3 and Figure 4 A physical connection diagram of a control system of a new energy station according to an exemplary embodiment of the present disclosure is shown.

[0034] In the first embodiment, the M relay boards 200 are all connected to the station master controller 100 for communication. Figure 3 As shown in (a) in .

[0035] In the second embodiment, the first relay board 200 among the M relay boards 200 is connected to the station master controller 100 for communication, and the kth relay board 200 among the M relay boards 200 is connected to the k-1th relay board 200 for communication. k is an integer greater than 1 and not greater than M. For example, Figure 3 As shown in (b) in .

[0036] In the third embodiment, a part of the M relay boards 200 are connected to the station master controller 100 for communication, and each relay board 200 that is not connected to the station master controller 100 for communication is connected to the corresponding relay board 200 for communication. The relay boards 200 that correspond to (i.e., are connected to) the relay boards 200 that are not connected to the station master controller 100 for communication are: the relay boards 200 that are connected to the station master controller for communication and / or other relay boards 200 that are not connected to the station master controller 100 for communication.

[0037] As an example, the communication connection mode of the relay board 200 that is not in communication connection with the station master controller 100 may include but is not limited to the following modes:

[0038] Method 1: Only communicate with the relay board 200 that is connected to the station master controller 100, for example, Figure 4 (a) The communication connection method of the relay board 2.

[0039] Method 2 is to communicate with the relay board 200 that is connected to the station master controller 100 and to communicate with the relay board 200 that is not connected to the station master controller 100. For example, Figure 4 (b) The communication connection method of the relay board 2.

[0040] Method three: only communicate with the relay board 200 that is not connected to the station master controller 100, for example, Figure 4 (b) The communication connection method of the relay board 3.

[0041] Figure 5 A schematic diagram of ring network communication of an in-feeder power controller according to an exemplary embodiment of the present disclosure is shown.

[0042] Reference Figure 5 , the power controller 300 in a single feeder establishes a ring communication system with the relay board 200 corresponding to the feeder. Specifically, the relay board 200 sends a data frame, and the first power controller 300 in the feeder (i.e., Figure 5 The power controller 1 in the feeder receives and forwards to the power controller 2, the power controller 2 receives and forwards to the power controller 3, and the last power controller in the feeder (i.e., Figure 5 The power controller N in the feeder receives and forwards it to the upper power controller N-1, and finally the data frame returns to the relay board 200 through the power controller 1. It should be understood that the data frame sent by the relay board 200 to the power controller 1 in the feeder can be a data frame generated by the relay board 200 itself, or a data frame sent by the station master controller 100.

[0043] Specifically, for the i-th feeder, N on the i-th feeder i The first power supply controller 300 of the power supply controllers 300 is used to send the data frame received from the relay board 200 corresponding to the i-th feeder to the N i The second power controller 300 among the power controllers 300 is further configured to send the data frame received from the second power controller 300 to the relay board 200 corresponding to the i-th feeder line. iThe zth power supply controller 300 among the power supply controllers 300 is used to send the data frame received from the z-1th power supply controller 300 to the z+1th power supply controller 300, and is also used to send the data frame received from the z+1th power supply controller 300 to the z-1th power supply controller 300, where z is greater than 1 and less than N. i An integer. N i The Nth of the power supply controllers 300 i The power supply controller 300 is used to i -1 data frame received by the power controller 300 is sent to the Nth i - 1 power supply controller 300.

[0044] In addition, according to an exemplary embodiment of the present disclosure, a high-precision clock synchronization method for a new energy station is also proposed.

[0045] As an example, M relay boards 200 and all power controllers 300 update the timing value of the local timer based on the timing value of the timer of the station master controller 100, so as to synchronize with the time of the station master controller 100. That is, the timer of the station master controller 100 is used as the synchronization reference of the station control system, and other relay boards 200 and power controllers 300 are synchronized regularly, thereby realizing the overall time synchronization of the control system of the new energy station.

[0046] As an example, a 64-bit (int integer) time counter may be constructed inside the site master controller 100, the relay board 200, and the power supply controller 300, respectively, and the unit of the time counter is, for example, nanoseconds.

[0047] Figure 6 A schematic diagram showing hierarchical clock timing synchronization according to an exemplary embodiment of the present disclosure is shown.

[0048] Reference Figure 6 , the time synchronization of M relay boards 200 and all power controllers 300 with the station master controller 100 can be achieved hierarchically through the first-level clock timing synchronization and the second-level clock timing synchronization. Specifically, the first-level clock timing synchronization is for the station controller 100 to achieve clock timing synchronization with each relay board 200; the second-level clock timing synchronization is for the relay board 200 and the power controller 300 in the corresponding feeder to achieve clock timing synchronization. According to the exemplary embodiment of the present disclosure, a clock synchronization system is implemented that uses the timing of the station controller 100 as the time reference and is followed by other controllers of the station control system, and the clock synchronization system has strong scalability.

[0049] As an example, the synchronization method of the first-level clock timing synchronization may include:

[0050] S1: The station master controller 100 and the relay board 200 establish data exchange through communication. The station master controller 100 records the time information of sending data frames to the relay board 200 and receiving data frames, and calculates the time difference based on the time information, and then calculates the communication delay between the station master controller 100 and the relay board 200 based on the time difference, such as Figure 6 The Δt in the communication delay is sent to the relay board 200 as the compensation amount Δt in the clock synchronization process of the relay board 200.

[0051] S2: The station master controller 100 periodically sends the current value of the local timer (for example, Figure 7 t1 in the figure), the relay board 200 updates the current value of the local time timer to: the received time data t1 plus Δt, thereby correcting the time timer of the relay board 200 and eliminating the time offset. At this point, the time timing synchronization between the station master controller 100 and the relay board 200 is achieved.

[0052] As an example, if the site master controller 100 and one or some relay boards 200 are close to each other, and the same crystal oscillator is used as the operating clock of their respective CPUs, synchronization can be maintained only once at the initial power-on stage.

[0053] As an example, the station master controller 100 may be configured to perform the following operations: periodically send the current timing value of the local timer (hereinafter also referred to as the master controller current timing value) to the relay board 200 that is communicatively connected to the station master controller 100. Accordingly, the relay board 200 that receives the master controller current timing value sent by the station master controller 100 will send the master controller current timing value to other relay boards 200 that are communicatively connected to it.

[0054] As an example, each relay board 200 can be configured to perform the following operations: receive the communication delay between the site master controller 100 and the relay board 200 calculated by the site master controller 100; in response to receiving the timing value of the time timer of the site master controller 100, update the timing value of the local time timer to the sum of the received timing value and the communication delay.

[0055] Regarding the method for determining the communication delay between the site master controller 100 and the relay board 200, as an example, the site master controller 100 may be configured to perform the following operations a1-c1:

[0056] (a1) Each relay board 200 that is connected to the station master controller 100 for communication is respectively regarded as a target relay board 200, and the sending time timing value of the target data frame sent by the station master controller 100 to the target relay board 200 and the receiving time timing value of the target data frame received from the target relay board 200 are recorded.

[0057] (b1) Based on the recorded sending time timing value and receiving time timing value, the communication delay between the site master controller 100 and the target relay board 200 is determined.

[0058] As an example, when the target relay board 200 is not communicatively connected to other relay boards 200, half of the difference between the recorded receiving time timing value and the recorded sending time timing value can be used as the communication delay between the site master controller 100 and the target relay board 200.

[0059] As an example, when the target relay board 200 is in communication connection with other relay boards 200, the station master controller 100 also receives a transmission time difference for the target data frame from the target relay board 200, wherein the transmission time difference is the time difference between the sending time timing value of the target data frame sent by the target relay board 200 to the relay board 200 in communication connection with it and the receiving time timing value of the target data frame received from the relay board 200. The station master controller 100 determines the communication delay between the station master controller 100 and the target relay board 200 based on the recorded sending time timing value and receiving time timing value and the received transmission time difference value. For example, the difference between the recorded receiving time timing value and the recorded sending time timing value minus half of the received transmission time difference value can be used as the communication delay between the station master controller 100 and the target relay board 200.

[0060] The communication delay between the relay board 200 that is not directly connected to the station master controller 100 and the station master controller 100 can be understood as: the time required for the data frame sent by the station master controller 100 to be transmitted to the relay board 200 via other relay boards 200. For the relay board 200 that is not directly connected to the station master controller 100, the communication delay between the station master controller 100 and the relay board 200 can be calculated in a manner similar to the above manner. Specifically, the communication delay between the relay board 200 and the station master controller 100 can be determined based on the sending time timing value of the target data frame sent by the station master controller 100 to the upstream target relay board 200 corresponding to the relay board 200, the receiving time timing value of the target data frame received by the station master controller 100 from the upstream target relay board 200, and the transmission time difference of the relay board 200 for the target data frame. For example, Figure 4 In the figure, the upstream target relay board 200 of relay board 2 and relay board 3 are both relay board 1. After receiving the target data frame sent by the site master controller 100, relay board 1 will send it to relay board 2. After receiving the target data frame sent by relay board 1, relay board 2 will send it to relay board 3. After receiving the target data frame sent by relay board 2, relay board 3 will return it to relay board 2. After receiving the target data frame sent by relay board 3, relay board 2 will send it to relay board 1. After receiving the target data frame sent by relay board 2, relay board 1 will send it to the site master controller 100.

[0061] As an example, the synchronization method of the second-level clock timing synchronization may include:

[0062] S3: The relay board 200 and all the power controllers 300 in the corresponding feeder establish a master-slave communication network such as Figure 5 , the relay board 200 records the time information of sending and receiving data frames to the power controller 300 and calculates the time difference based on the time information; each power controller 300 respectively records the time information of frame data sending and receiving, calculates the time difference based on the time information, and reports it to the relay board 200, and the communication delay between the relay board 200 and each power controller 300 is calculated as follows Figure 6 [Δt1, Δt2, ..., Δtn-1, Δtn], the relay board 200 sends the communication delay to the corresponding power controller 300 as the compensation amount Δtx in the clock synchronization process of the power controller 300.

[0063] S4: The relay board 200 periodically sends the current value of the local timer (for example, Figure 8 t2), each power controller 300 updates the current value of the time timing of the local time timer to: the received time timing data t2 plus Δtx, thereby correcting the time timer in the power controller 300 and eliminating the time offset. At this point, the time timing synchronization of the power controller 300 and the relay board 200 is achieved.

[0064] As an example, each relay board 200 may be configured to perform the following operations: periodically send the current timing value of the local timer (hereinafter also referred to as the relay board current timing value) to the power supply controller 300 that is communicatively connected to the relay board 200. Accordingly, the power supply controller 300 that receives the relay board current timing value sent by the relay board 200 sends the relay board current timing value to other power supply controllers 300 that are communicatively connected to it.

[0065] As an example, each power controller 300 can be configured to perform the following operations: receive the communication delay between the relay board 200 and the power controller 300 calculated by the relay board 200 corresponding to the feeder where the power controller 300 is located; and in response to receiving the timing value of the time timer of the relay board 200, update the timing value of the local time timer to the sum of the received timing value and the communication delay.

[0066] Regarding the manner of determining the communication delay between the relay board 200 and the power controller 300, as an example, each relay board 200 may be configured to perform the following operations a2-c2:

[0067] (a2) Recording the sending time timing value of the target data frame to the power controller 300 that is communicatively connected to the relay board 200 and the receiving time timing value of the target data frame received from the power controller.

[0068] (b2) receiving a transmission time difference value for a target data frame from a target power controller 300, wherein the transmission time difference value is the time difference between a sending time timing value when the target power controller 300 sends the target data frame to a power controller 300 connected thereto for communication, and a receiving time timing value when the target data frame is received from the power controller 300 connected thereto for communication.

[0069] Here, the target power controller 300, i.e., the power controller 300 in the feeder corresponding to the relay board 200 whose communication delay with the relay board 200 is to be determined, can be a power controller 300 directly connected to the relay board 200 for communication, or a power controller 300 not connected to the relay board 200 for communication.

[0070] (c2) Determine the communication delay between the relay board 200 and the target power controller 300 based on the recorded sending time timing value and receiving time timing value and the received transmission time difference value.

[0071] For example, the relay board 200 can determine the communication delay between the relay board 200 and the power controller 2 based on the sending time timing value of the target data frame sent to the power controller 1, the receiving time timing value of the target data frame received from the power controller 1, and the transmission time difference reported by the power controller 2 (that is, the time difference between the sending time timing value of the target data frame sent by the power controller 2 to the power controller 3 and the receiving time timing value of the target data frame received from the power controller 3).

[0072] The present disclosure takes into account that the current control system deployment has certain limitations and cannot achieve the synchronization of the field station control system, and provides a field station synchronization control system with high real-time performance. In the exemplary embodiment of the present disclosure, the carrier for the execution of the controller software can be FPGA, and the execution process has extremely strong concurrency. The sending and receiving time of the communication data frame is recorded by FPGA. The error at the recording time is half of the clock cycle of the receiving latch. If a 100-mega clock latch is selected, the recording time error is 5 nanoseconds. Due to the difference in the number of series power controllers in a single feeder, the error range will be gradually enlarged from the first power controller to the last power controller. The limit theory is 5*the number of series power controllers, but after physical measurement, it cannot be ruled out that there are complementary factors including the accuracy of the crystal oscillator and the temperature environment, the length of the optical fiber line, etc., and the synchronization error is smaller than the theoretical value.

[0073] According to the exemplary embodiments of the present disclosure, a high-performance control system is provided for the station-level control of new energy, with nanosecond-level synchronization accuracy, and the control delay of the entire field is achieved within hundreds of microseconds, thus achieving synchronization and coordination of the entire field.

[0074] A new energy station according to an exemplary embodiment of the present disclosure includes a control system as described in the above exemplary embodiment.

[0075] Although some exemplary embodiments of the present disclosure have been shown and described, it will be appreciated by those skilled in the art that modifications may be made to these embodiments without departing from the scope and spirit of the present disclosure as defined by the claims and their equivalents.

Claims

1. A control system for a new energy station, characterized in that: The control system includes: a station master controller, M relay boards, and power controllers of each power supply device on each feeder line in the new energy station; At least some of the M relay boards are connected to the station master controller for communication, and the relay boards that are not connected to the station master controller for communication are connected to other relay boards for communication; Each feeder corresponds to a relay board, and the N i The first power supply controller among the N power supply controllers is connected to the relay board corresponding to the i-th feeder line for communication. i The j-th power controller among the power controllers is communicatively connected with the j-1-th power controller; Among them, N in the i-th feeder i The power supply controllers include: each power supply controller of each power supply device on the i-th feeder, M is an integer greater than 0, i is an integer greater than 0 and not greater than the total number of feeders, N i is an integer greater than 1, j is greater than 1 and not greater than N i An integer.

2. The control system according to claim 1, characterized in that: The M relay boards are all in communication connection with the station master controller; Alternatively, the first relay board among the M relay boards is communicatively connected to the station master controller, and the kth relay board among the M relay boards is communicatively connected to the k-1th relay board, wherein k is an integer greater than 1 and not greater than M; Alternatively, a part of the M relay boards are communicatively connected to the station master controller, and each relay board that is not communicatively connected to the station master controller is respectively communicatively connected to a corresponding relay board, wherein the relay board corresponding to the relay board that is not communicatively connected to the station master controller is: the relay board that is communicatively connected to the station master controller and / or other relay boards that are not communicatively connected to the station master controller.

3. The control system according to claim 1, characterized in that: The N i The first power supply controller among the power supply controllers is used to send the data frame received from the relay board corresponding to the i-th feeder to the second power supply controller, and is also used to send the data frame received from the second power supply controller to the relay board corresponding to the i-th feeder; The N i The zth power supply controller among the power supply controllers is used to send the data frame received from the z-1th power supply controller to the z+1th power supply controller, and is also used to send the data frame received from the z+1th power supply controller to the z-1th power supply controller; The N i Nth of the power supply controllers i A power supply controller is used to generate power from the Nth i -1 The data frame received by the power controller is sent to the Nth i -1 power controller; Where z is greater than 1 and less than N i An integer.

4. The control system according to any one of claims 1 to 3, characterized in that: The M relay boards and all power supply controllers update the timing value of the local time timer based on the timing value of the time timer of the site master controller to synchronize with the time of the site master controller.

5. The control system according to claim 4, characterized in that: Each relay board is configured to do the following: receiving the communication delay between the station master controller and the relay board calculated by the station master controller; In response to receiving the timing value of the time timer of the station master controller, the timing value of the local time timer is updated to the sum of the received timing value and the communication delay.

6. The control system according to claim 4, characterized in that: Each power controller is configured to do the following: Receiving the communication delay between the relay board and the power controller calculated by the relay board corresponding to the feeder where the power controller is located; In response to receiving the timing value of the time timer of the relay board, the timing value of the local time timer is updated to the sum of the received timing value and the communication delay.

7. The control system according to claim 5, characterized in that: The station master controller is configured to perform the following operations: Recording a sending time timing value of a target data frame sent to a target relay board that is in communication connection with the station master controller, and a receiving time timing value of the target data frame received from the target relay board; Based on the recorded sending time timing value and receiving time timing value, the communication delay between the site master controller and the target relay board is determined.

8. The control system according to claim 6, characterized in that: Each relay board is configured to do the following: Recording a sending time timing value of a target data frame sent to a power controller that is communicatively connected to the relay board, and a receiving time timing value of the target data frame received from the power controller; Receive a transmission time difference value of the target power controller for the target data frame, wherein the transmission time difference value is: a time difference between a sending time timing value of the target data frame sent by the target power controller to the power controller connected to the communication therewith and a receiving time timing value of the target data frame received from the power controller connected to the communication therewith; Based on the recorded sending time timing value and receiving time timing value and the received transmission time difference value, the communication delay between the relay board and the target power supply controller is determined.

9. The control system according to claim 4, characterized in that: The station master controller is configured to perform the following operations: periodically sending the current timing value of the local time timer to the relay board that is communicatively connected to the station master controller; Each relay board is configured to perform the following operations: periodically sending a current timing value of a local time timer to a power controller that is communicatively connected to the relay board.

10. The control system according to claim 1, characterized in that: The type of power supply equipment includes at least one of the following: new energy power generation equipment, energy storage equipment; And / or, the power controller of the power supply device includes: a controller of a power electronic converter of the power supply device.

11. A new energy station, characterized in that: The new energy station comprises a control system as described in any one of claims 1 to 10.

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