Communication control method and system in photovoltaic power plant

Abstract

The invention relates to the technical field of communication management and control, in particular to a communication management and control method and system in a photovoltaic power plant. Comprising the steps that a plurality of communication points are established according to photovoltaic power generation unit equipment parameters, and each communication point is provided with a communication sub-module; establishing a communication path between each communication point and the central control unit, and constructing a communication network according to all the communication paths; setting a communication strategy of each communication point, generating a communication risk value of each communication point according to a preset detection time node, and judging whether a maintenance instruction is generated or not according to all the communication risk values; corresponding communication points are established on the basis of the current collection lines and the photovoltaic power generation units, an integral communication network is established, and equipment parameters and data transmission speed of each communication path are dynamically adjusted on the basis of the interaction frequency between each communication point and the central control unit, so that the communication efficiency between each communication point and the central control unit is ensured. And the cooperative regulation and control efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of communication control technology, and in particular to a communication control method and system within a photovoltaic power plant. Background Art

[0002] In the photovoltaic power generation industry, the communication system in the photovoltaic module monitoring system is usually composed of two traditional wired and wireless methods. Among them, the wired method generally uses the RS485 bus network. On the same bus, up to 32 nodes can be connected. The deployment requirements are high and special cables need to be laid.

[0003] However, the current communication network within photovoltaic power plants has problems such as communication delays or untimely warnings of communication path failures, which results in the central control unit being unable to obtain real-time data from the photovoltaic power generation unit in a timely manner, and the photovoltaic power generation unit being unable to obtain operating instructions in a timely manner, affecting the coordinated control efficiency within the entire plant, and thus reducing the overall operating efficiency. Summary of the invention

[0004] The purpose of this application is to solve the above technical problems and provide a method and system for communication control in a photovoltaic power plant, which aims to comprehensively monitor the communication network inside the photovoltaic power plant, conduct fault warning and maintenance in a timely manner, and ensure the internal communication efficiency of the plant.

[0005] In some embodiments of the present application, corresponding communication points are established based on each collector line and photovoltaic power generation unit, and a set of intelligent sub-array controllers and ring network switches are configured at each communication point, and then the overall communication network is built through communication optical cables (bus mode), and based on the interaction frequency between each communication point and the central control unit, the device parameters and data transmission speed of each communication path are dynamically adjusted to ensure the communication efficiency between each communication point and the central control unit. Improve the efficiency of coordinated regulation.

[0006] In some embodiments of the present application, the communication paths of each communication point are periodically checked, so as to timely provide fault warnings and repairs for communication paths with risks of communication failures, thereby ensuring the communication efficiency within the factory and thereby improving the operating efficiency of the factory.

[0007] In some embodiments of the present application, a method for communication control in a photovoltaic power plant is provided, comprising:

[0008] Establishing a plurality of communication points according to the equipment parameters of the photovoltaic power generation unit, wherein the communication points are provided with communication submodules;

[0009] Establish communication paths between each communication point and the central control unit, and build a communication network based on all communication paths;

[0010] Set the communication strategy for each communication point, generate the communication risk value for each communication point according to the preset detection time node, and determine whether to generate a maintenance instruction based on all the communication risk values;

[0011] Among them, when establishing multiple communication points, it includes:

[0012] Establish a communication point sequence A, A = (a1, a2...ai...an), where ai is the i-th communication point; n is the number of communication sub-modules.

[0013] In some embodiments of the present application, when constructing a communication network according to all communication paths, the process includes:

[0014] Establish a communication path sequence B, B = (b1, b2...bi...bn), where bi is the communication path between the i-th communication point and the central control unit;

[0015] Select the i-th communication path as the target communication path in sequence;

[0016] Generate a path evaluation value f of the target communication path;

[0017]

[0018] Among them, θ1 is the number of the i-th communication evaluation index; ηi is the influencing factor of the i-th communication evaluation index; pi is the reference value of the i-th communication evaluation index in the target communication path;

[0019] Generate path evaluation values ​​for each communication path in sequence;

[0020] Establish a path evaluation value sequence F, F = (f1, f2...fi...fn), where fi is the path evaluation value of the i-th communication path;

[0021] According to the path evaluation value sequence F, the device parameters of each communication path are set in sequence;

[0022] Build a communication network based on all device parameters.

[0023] In some embodiments of the present application, when setting the communication strategy of each communication point, it includes:

[0024] Set the i-th communication point as the target communication point in sequence;

[0025] Generate a communication evaluation value c of the target communication point according to the operating parameters of the target communication point;

[0026]

[0027] Among them, e1 is the preset first weight coefficient; e2 is the preset second weight coefficient; Q1 is the preset first fixed coefficient; Q2 is the preset second coefficient; θ2 is the number of operation evaluation indicators; ki is the reference value of the i-th operation evaluation indicator of the target communication point; βi is the influencing factor of the i-th operation evaluation indicator; f' is the path evaluation value of the communication path between the central control units of the target communication point;

[0028] According to the communication evaluation value c, the communication strategy of the target communication point is set;

[0029] Generate communication evaluation values ​​for each communication point in sequence;

[0030] Establish a communication evaluation value sequence C, C = (c1, c2...ci...cn), where ci is the communication evaluation value of the i-th communication point;

[0031] Generate communication strategies for each communication point.

[0032] In some embodiments of the present application, when the communication risk value of each communication point is generated according to the preset detection time node, it includes:

[0033] Set the i-th communication point as the target communication point in sequence;

[0034] According to the communication evaluation value c of the target communication point, the detection time node and detection strategy of the target communication point are set;

[0035] The communication submodule of the target communication point sends multiple sets of verification data to the central control unit according to the preset detection time nodes;

[0036] Generate a data transmission duration sequence T of the current detection time node, T = (t1, t2...ti...tm), where ti is the transmission duration of the i-th group of verification data; m is the number of verification data groups;

[0037] Generate the communication risk value d of the target communication point at the current detection time node according to the data transmission time series T;

[0038] Generate communication risk values ​​for each communication point in sequence;

[0039] Establish a communication risk value sequence D, D = (d1, d2...di...dn), where di is the communication risk value of the i-th communication point;

[0040] The corresponding communication risk value is updated according to the detection time node of each communication point.

[0041] In some embodiments of the present application, when the communication risk value d is generated, it includes:

[0042]

[0043] Among them, e3 is the preset third weight coefficient; e4 is the preset fourth weight coefficient; Q3 is the preset third fixed coefficient; Q4 is the preset fourth fixed coefficient; t' is the standard data transmission time; Δt is the average value of all data in the data transmission time series T; Y(i) is the selection coefficient; if ti-t'>0, Y(i)=1; ti-t'<0, Y(i)=0.

[0044] In some embodiments of the present application, when setting the detection time node of the target communication point, it includes:

[0045] Presetting a first communication evaluation value interval (C1, C2), a second communication evaluation value interval (C2, C3) and a third communication evaluation value interval (C3, C4);

[0046] According to the communication evaluation value c of the target communication point, the time interval h between adjacent detection time nodes of the target communication point is set;

[0047] If c is in the preset first communication evaluation value interval, the time interval t is set to the preset first time interval T1, that is, t=T1;

[0048] If c is in the preset second communication evaluation value interval, the time interval t is set to the preset second time interval T2, that is, t=T2;

[0049] If c is in the preset first communication evaluation value interval, the time interval t is set to the preset third time interval T3, that is, t=T3; and T1<T2<T3.

[0050] In some embodiments of the present application, when determining whether to generate a maintenance instruction according to all communication risk values, the process includes:

[0051] Preset a first communication risk value threshold D1;

[0052] If di>D1, generate the first-level maintenance instruction for the i-th communication point;

[0053] The communication risk value series D generates the maintenance evaluation value g;

[0054]

[0055] Among them, e5 is the preset fifth weight coefficient; e6 is the preset sixth weight coefficient; Q5 is the preset fifth fixed coefficient; Q6 is the preset sixth fixed coefficient; Δd is the average value of all data in the communication risk value series D; ri is the weight coefficient set based on the communication evaluation value of the i-th communication point;

[0056] Preset the first maintenance evaluation value threshold G1;

[0057] If g>G1, a secondary maintenance instruction is generated.

[0058] In some embodiments of the present application, a communication control system within a photovoltaic power plant is provided, comprising:

[0059] The central control unit is used to establish multiple communication points according to the equipment parameters of the photovoltaic power generation unit;

[0060] A communication unit, comprising a plurality of communication submodules, wherein the communication submodules are arranged at communication points;

[0061] The central control unit comprises:

[0062] The first processing module is used to establish a communication point sequence A, A = (a1, a2 ... ai ... an), where ai is the i-th communication point; n is the number of communication submodules;

[0063] The second processing module is used to establish a communication path between each communication point and the central control unit, and to build a communication network based on all the communication paths;

[0064] The third processing module is used to set the communication strategy of each communication point;

[0065] The maintenance module is used to generate a communication risk value for each communication point according to a preset detection time node, and determine whether to generate a maintenance instruction based on all communication risk values.

[0066] In some embodiments of the present application, the second processing module is further used to:

[0067] Establish a communication path sequence B, B = (b1, b2...bi...bn), where bi is the communication path between the i-th communication point and the central control unit;

[0068] Select the i-th communication path as the target communication path in sequence;

[0069] Generate a path evaluation value f of the target communication path;

[0070]

[0071] Among them, θ1 is the number of the i-th communication evaluation index; ηi is the influencing factor of the i-th communication evaluation index; pi is the reference value of the i-th communication evaluation index in the target communication path;

[0072] Generate path evaluation values ​​for each communication path in sequence;

[0073] Establish a path evaluation value sequence F, F = (f1, f2...fi...fn), where fi is the path evaluation value of the i-th communication path;

[0074] According to the path evaluation value sequence F, the device parameters of each communication path are set in sequence;

[0075] Build a communication network based on all device parameters.

[0076] In some embodiments of the present application, the third processing module is further used to:

[0077] Set the i-th communication point as the target communication point in sequence;

[0078] Generate a communication evaluation value c of the target communication point according to the operating parameters of the target communication point;

[0079]

[0080] Among them, e1 is the preset first weight coefficient; e2 is the preset second weight coefficient; Q1 is the preset first fixed coefficient; Q2 is the preset second coefficient; θ2 is the number of operation evaluation indicators; ki is the reference value of the i-th operation evaluation indicator of the target communication point; βi is the influencing factor of the i-th operation evaluation indicator; f' is the path evaluation value of the communication path between the central control units of the target communication point;

[0081] According to the communication evaluation value c, the communication strategy of the target communication point is set;

[0082] Generate communication evaluation values ​​for each communication point in sequence;

[0083] Establish a communication evaluation value sequence C, C = (c1, c2...ci...cn), where ci is the communication evaluation value of the i-th communication point;

[0084] Generate communication strategies for each communication point.

[0085] Compared with the prior art, the communication control method and system in a photovoltaic power plant according to the embodiment of the present application has the following beneficial effects:

[0086] Based on each collector line and photovoltaic power generation unit, corresponding communication points are established, and a set of intelligent sub-array controllers and ring network switches are configured at each communication point. Then, through the communication optical cable (bus mode), the overall communication network is built, and based on the interaction frequency between each communication point and the central control unit, the equipment parameters and data transmission speed of each communication path are dynamically adjusted to ensure the communication efficiency between each communication point and the central control unit. Improve the efficiency of coordinated regulation.

[0087] The communication paths of each communication point are periodically checked, so that fault warnings and repairs can be carried out in a timely manner for communication paths with risks of communication failures, ensuring the communication efficiency within the factory and thus improving the operating efficiency of the factory. BRIEF DESCRIPTION OF THE DRAWINGS

[0088] Figure 1 It is a flow chart of a communication control method within a photovoltaic power plant in a preferred embodiment of the present application. DETAILED DESCRIPTION

[0089] The specific implementation methods of the present application are further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application but are not intended to limit the scope of the present application.

[0090] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0091] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0092] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0093] like Figure 1 As shown, a communication control method within a photovoltaic power plant according to a preferred embodiment of the present application includes:

[0094] S101: establishing a plurality of communication points according to the equipment parameters of the photovoltaic power generation unit, wherein the communication points are provided with communication submodules;

[0095] S102: establishing a communication path between each communication point and the central control unit, and building a communication network based on all communication paths;

[0096] S103: setting the communication strategy of each communication point, generating the communication risk value of each communication point according to the preset detection time node, and determining whether to generate a maintenance instruction according to all the communication risk values;

[0097] Among them, when establishing multiple communication points, it includes:

[0098] Establish a communication point sequence A, A = (a1, a2...ai...an), where ai is the i-th communication point; n is the number of communication sub-modules.

[0099] Specifically, corresponding communication points are established based on each collection line and photovoltaic power generation unit, and a set of intelligent sub-array controllers and ring network switches are configured in each communication, and then the overall communication network is built through communication optical cables (bus mode).

[0100] Specifically, when building a communication network based on all communication paths, it includes:

[0101] Establish a communication path sequence B, B = (b1, b2...bi...bn), where bi is the communication path between the i-th communication point and the central control unit;

[0102] Select the i-th communication path as the target communication path in sequence;

[0103] Generate a path evaluation value f of the target communication path;

[0104]

[0105] Among them, θ1 is the number of the i-th communication evaluation index; ηi is the influencing factor of the i-th communication evaluation index; pi is the reference value of the i-th communication evaluation index in the target communication path;

[0106] Generate path evaluation values ​​for each communication path in sequence;

[0107] Establish a path evaluation value sequence F, F = (f1, f2...fi...fn), where fi is the path evaluation value of the i-th communication path;

[0108] According to the path evaluation value sequence F, the device parameters of each communication path are set in sequence;

[0109] Build a communication network based on all device parameters.

[0110] Specifically, its path evaluation indicators include but are not limited to the frequency of data interaction within the path, the equipment parameters of the photovoltaic power generation unit at the corresponding monitoring point, the fault frequency, the path length and other parameters. The larger the path evaluation value, the more important the current communication path is.

[0111] In a preferred embodiment of the present application, when setting the communication strategy of each communication point, it includes:

[0112] Set the i-th communication point as the target communication point in sequence;

[0113] Generate a communication evaluation value c of the target communication point according to the operating parameters of the target communication point;

[0114]

[0115] Among them, e1 is the preset first weight coefficient; e2 is the preset second weight coefficient; Q1 is the preset first fixed coefficient; Q2 is the preset second coefficient; θ2 is the number of operation evaluation indicators; ki is the reference value of the i-th operation evaluation indicator of the target communication point; βi is the influencing factor of the i-th operation evaluation indicator; f' is the path evaluation value of the communication path between the central control units of the target communication point;

[0116] According to the communication evaluation value c, the communication strategy of the target communication point is set;

[0117] Generate communication evaluation values ​​for each communication point in sequence;

[0118] Establish a communication evaluation value sequence C, C = (c1, c2...ci...cn), where ci is the communication evaluation value of the i-th communication point;

[0119] Generate communication strategies for each communication point.

[0120] Specifically, by presetting the first fixed coefficient and the second fixed coefficient, all data in the model are normalized so that each parameter is in the same value range.

[0121] Specifically, the operation evaluation indicators include, but are not limited to, the failure frequency of the photovoltaic power generation unit at the target monitoring point, the data interaction frequency, the regulated frequency, the probability of operation fluctuation and other parameters.

[0122] Specifically, the larger the communication evaluation value is, the greater the communication demand of the current communication point is. Therefore, when formulating the communication strategy of the current monitoring point, the upper limit of the single data transmission capacity is higher and the transmission speed is faster.

[0123] Specifically, the communication strategy includes the maximum data transmission volume, data transmission speed, whether the data is encrypted, etc.

[0124] It is understandable that in the above embodiments, corresponding communication points are established based on each collector line and photovoltaic power generation unit, and a set of intelligent sub-array controllers and ring network switches are configured at each communication point, and then the overall communication network is built through communication optical cables (bus mode), and based on the interaction frequency between each communication point and the central control unit, the device parameters and data transmission speed of each communication path are dynamically adjusted to ensure the communication efficiency between each communication point and the central control unit. Improve the efficiency of coordinated regulation.

[0125] The communication paths of each communication point are periodically checked, so that fault warnings and repairs can be carried out in a timely manner for communication paths with risks of communication failures, ensuring the communication efficiency within the factory and thus improving the operating efficiency of the factory.

[0126] In a preferred embodiment of the present application, when the communication risk value of each communication point is generated according to the preset detection time node, it includes:

[0127] Set the i-th communication point as the target communication point in sequence;

[0128] According to the communication evaluation value c of the target communication point, the detection time node and detection strategy of the target communication point are set;

[0129] The communication submodule of the target communication point sends multiple sets of verification data to the central control unit according to the preset detection time nodes;

[0130] Generate a data transmission duration sequence T of the current detection time node, T = (t1, t2...ti...tm), where ti is the transmission duration of the i-th group of verification data; m is the number of verification data groups;

[0131] Generate the communication risk value d of the target communication point at the current detection time node according to the data transmission time series T;

[0132] Generate communication risk values ​​for each communication point in sequence;

[0133] Establish a communication risk value sequence D, D = (d1, d2...di...dn), where di is the communication risk value of the i-th communication point;

[0134] The corresponding communication risk value is updated according to the detection time node of each communication point.

[0135] Specifically, when generating the communication risk value d, it includes:

[0136]

[0137] Among them, e3 is the preset third weight coefficient; e4 is the preset fourth weight coefficient; Q3 is the preset third fixed coefficient; Q4 is the preset fourth fixed coefficient; t' is the standard data transmission time; Δt is the average value of all data in the data transmission time series T; Y(i) is the selection coefficient; if ti-t'>0, Y(i)=1; ti-t'<0, Y(i)=0.

[0138] Specifically, the larger the communication risk value, the greater the possibility of communication delay between the communication path corresponding to the target communication point and the communication sub-module. Timely maintenance is required to eliminate communication risks and avoid interference with the operation efficiency of the factory due to communication delays.

[0139] Specifically, when setting the detection time node of the target communication point, it includes:

[0140] Presetting a first communication evaluation value interval (C1, C2), a second communication evaluation value interval (C2, C3) and a third communication evaluation value interval (C3, C4);

[0141] According to the communication evaluation value c of the target communication point, the time interval h between adjacent detection time nodes of the target communication point is set;

[0142] If c is in the preset first communication evaluation value interval, the time interval t is set to the preset first time interval T1, that is, t=T1;

[0143] If c is in the preset second communication evaluation value interval, the time interval t is set to the preset second time interval T2, that is, t=T2;

[0144] If c is in the preset first communication evaluation value interval, the time interval t is set to the preset third time interval T3, that is, t=T3; and T1<T2<T3.

[0145] Specifically, the corresponding detection time nodes are dynamically adjusted according to the communication evaluation values ​​of different communication points to avoid excessive detection and occupation of communication resources, while ensuring the timeliness of fault warnings for each communication path.

[0146] Specifically, when determining whether to generate a maintenance instruction based on all communication risk values, it includes:

[0147] Preset a first communication risk value threshold D1;

[0148] If di>D1, generate the first-level maintenance instruction for the i-th communication point;

[0149] The communication risk value series D generates the maintenance evaluation value g;

[0150]

[0151] Among them, e5 is the preset fifth weight coefficient; e6 is the preset sixth weight coefficient; Q5 is the preset fifth fixed coefficient; Q6 is the preset sixth fixed coefficient; Δd is the average value of all data in the communication risk value series D; ri is the weight coefficient set based on the communication evaluation value of the i-th communication point;

[0152] Preset the first maintenance evaluation value threshold G1;

[0153] If g>G1, a secondary maintenance instruction is generated.

[0154] Specifically, the first-level maintenance instruction refers to the maintenance of the communication path of the communication point; the second-level maintenance instruction refers to the overall maintenance.

[0155] It can be understood that in the above embodiment, the communication paths of each communication point are periodically detected, so as to timely provide fault warnings and repairs for communication paths with risks of communication failures, thereby ensuring the communication efficiency within the factory and thus improving the operating efficiency of the factory.

[0156] Based on another preferred embodiment of a method for communication control in a photovoltaic power plant in any of the above preferred embodiments, this preferred embodiment provides a communication control system in a photovoltaic power plant, including:

[0157] The central control unit is used to establish multiple communication points according to the equipment parameters of the photovoltaic power generation unit;

[0158] A communication unit, comprising a plurality of communication submodules, wherein the communication submodules are arranged at communication points;

[0159] The central control unit includes:

[0160] The first processing module is used to establish a communication point sequence A, A = (a1, a2 ... ai ... an), where ai is the i-th communication point; n is the number of communication submodules;

[0161] The second processing module is used to establish a communication path between each communication point and the central control unit, and to build a communication network based on all the communication paths;

[0162] The third processing module is used to set the communication strategy of each communication point;

[0163] The maintenance module is used to generate a communication risk value for each communication point according to a preset detection time node, and determine whether to generate a maintenance instruction based on all communication risk values.

[0164] Specifically, the second processing module is further used for:

[0165] Establish a communication path sequence B, B = (b1, b2...bi...bn), where bi is the communication path between the i-th communication point and the central control unit;

[0166] Select the i-th communication path as the target communication path in sequence;

[0167] Generate a path evaluation value f of the target communication path;

[0168]

[0169] Among them, θ1 is the number of the i-th communication evaluation index; ηi is the influencing factor of the i-th communication evaluation index; pi is the reference value of the i-th communication evaluation index in the target communication path;

[0170] Generate path evaluation values ​​for each communication path in sequence;

[0171] Establish a path evaluation value sequence F, F = (f1, f2...fi...fn), where fi is the path evaluation value of the i-th communication path;

[0172] According to the path evaluation value sequence F, the device parameters of each communication path are set in sequence;

[0173] Build a communication network based on all device parameters.

[0174] Specifically, the third processing module is also used for:

[0175] Set the i-th communication point as the target communication point in sequence;

[0176] Generate a communication evaluation value c of the target communication point according to the operating parameters of the target communication point;

[0177]

[0178] Among them, e1 is the preset first weight coefficient; e2 is the preset second weight coefficient; Q1 is the preset first fixed coefficient; Q2 is the preset second coefficient; θ2 is the number of operation evaluation indicators; ki is the reference value of the i-th operation evaluation indicator of the target communication point; βi is the influencing factor of the i-th operation evaluation indicator; f' is the path evaluation value of the communication path between the central control units of the target communication point;

[0179] According to the communication evaluation value c, the communication strategy of the target communication point is set;

[0180] Generate communication evaluation values ​​for each communication point in sequence;

[0181] Establish a communication evaluation value sequence C, C = (c1, c2...ci...cn), where ci is the communication evaluation value of the i-th communication point;

[0182] Generate communication strategies for each communication point.

[0183] According to the first concept of this application, corresponding communication points are established based on each collector line and photovoltaic power generation unit, and a set of intelligent sub-array controllers and ring network switches are configured at each communication point, and then the overall communication network is built through communication optical cables (bus mode), and based on the interaction frequency between each communication point and the central control unit, the device parameters and data transmission speed of each communication path are dynamically adjusted to ensure the communication efficiency between each communication point and the central control unit. Improve the efficiency of coordinated regulation.

[0184] According to the second concept of the present application, the communication paths of each communication point are periodically checked, so as to timely provide fault warnings and repairs for the communication paths with the risk of communication failures, thereby ensuring the communication efficiency within the factory and thus improving the operating efficiency of the factory.

[0185] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present application. These improvements and substitutions should also be regarded as the scope of protection of the present application.

Claims

1. A method for communication control in a photovoltaic power plant, characterized in that: include: Establishing a plurality of communication points according to the equipment parameters of the photovoltaic power generation unit, wherein the communication points are provided with communication submodules; Establish communication paths between each communication point and the central control unit, and build a communication network based on all communication paths; Set the communication strategy for each communication point, generate the communication risk value for each communication point according to the preset detection time node, and determine whether to generate a maintenance instruction based on all the communication risk values; Among them, when establishing multiple communication points, it includes: Establish a communication point sequence A, A = (a1, a2...ai...an), where ai is the i-th communication point; n is the number of communication sub-modules.

2. The method for communication control in a photovoltaic power plant according to claim 1, characterized in that: The construction of the communication network according to all the communication paths includes: Establish a communication path sequence B, B = (b1, b2...bi...bn), where bi is the communication path between the i-th communication point and the central control unit; Select the i-th communication path as the target communication path in sequence; Generate a path evaluation value f of the target communication path; Among them, θ1 is the number of the i-th communication evaluation index; ηi is the influencing factor of the i-th communication evaluation index; pi is the reference value of the i-th communication evaluation index in the target communication path; Generate path evaluation values ​​for each communication path in sequence; Establish a path evaluation value sequence F, F = (f1, f2...fi...fn), where fi is the path evaluation value of the i-th communication path; According to the path evaluation value sequence F, the device parameters of each communication path are set in sequence; Build a communication network based on all device parameters.

3. The method for communication control in a photovoltaic power plant according to claim 2, characterized in that: When setting the communication strategy for each communication point, include: Set the i-th communication point as the target communication point in sequence; Generate a communication evaluation value c of the target communication point according to the operating parameters of the target communication point; Among them, e1 is the preset first weight coefficient; e2 is the preset second weight coefficient; Q1 is the preset first fixed coefficient; Q2 is the preset second coefficient; θ2 is the number of operation evaluation indicators; ki is the reference value of the i-th operation evaluation indicator of the target communication point; βi is the influencing factor of the i-th operation evaluation indicator; f' is the path evaluation value of the communication path between the central control units of the target communication point; According to the communication evaluation value c, the communication strategy of the target communication point is set; Generate communication evaluation values ​​for each communication point in sequence; Establish a communication evaluation value sequence C, C = (c1, c2...ci...cn), where ci is the communication evaluation value of the i-th communication point; Generate communication strategies for each communication point.

4. The method for communication control in a photovoltaic power plant according to claim 3, characterized in that: When the communication risk value of each communication point is generated according to the preset detection time node, it includes: Set the i-th communication point as the target communication point in sequence; According to the communication evaluation value c of the target communication point, the detection time node and detection strategy of the target communication point are set; The communication submodule of the target communication point sends multiple sets of verification data to the central control unit according to the preset detection time nodes; Generate a data transmission duration sequence T of the current detection time node, T = (t1, t2...ti...tm), where ti is the transmission duration of the i-th group of verification data; m is the number of verification data groups; Generate the communication risk value d of the target communication point at the current detection time node according to the data transmission time series T; Generate communication risk values ​​for each communication point in sequence; Establish a communication risk value sequence D, D = (d1, d2...di...dn), where di is the communication risk value of the i-th communication point; The corresponding communication risk value is updated according to the detection time node of each communication point.

5. The method for controlling communication in a photovoltaic power plant according to claim 4, characterized in that: When generating the communication risk value d, it includes: Among them, e3 is the preset third weight coefficient; e4 is the preset fourth weight coefficient; Q3 is the preset third fixed coefficient; Q4 is the preset fourth fixed coefficient; t' is the standard data transmission time; Δt is the average value of all data in the data transmission time series T; Y(i) is the selection coefficient; if ti-t'>0, Y(i)=1; ti-t'<0, Y(i)=0.

6. The method for controlling communication in a photovoltaic power plant according to claim 4, characterized in that: When setting the detection time node of the target communication point, it includes: Presetting a first communication evaluation value interval (C1, C2), a second communication evaluation value interval (C2, C3) and a third communication evaluation value interval (C3, C4); According to the communication evaluation value c of the target communication point, the time interval h between adjacent detection time nodes of the target communication point is set; If c is in the preset first communication evaluation value interval, the time interval t is set to the preset first time interval T1, that is, t=T1; If c is in the preset second communication evaluation value interval, the time interval t is set to the preset second time interval T2, that is, t=T2; If c is in the preset first communication evaluation value interval, the time interval t is set to the preset third time interval T3, that is, t=T3; and T1<T2<T3.

7. The method for controlling communication in a photovoltaic power plant according to claim 4, characterized in that: When judging whether to generate a maintenance instruction based on all communication risk values, it includes: Preset a first communication risk value threshold D1; If di>D1, generate the first-level maintenance instruction for the i-th communication point; The communication risk value series D generates the maintenance evaluation value g; Among them, e5 is the preset fifth weight coefficient; e6 is the preset sixth weight coefficient; Q5 is the preset fifth fixed coefficient; Q6 is the preset sixth fixed coefficient; Δd is the average value of all data in the communication risk value series D; ri is the weight coefficient set based on the communication evaluation value of the i-th communication point; Preset the first maintenance evaluation value threshold G1; If g>G1, a secondary maintenance instruction is generated.

8. A photovoltaic power plant internal communication control system, using the photovoltaic power plant internal communication control method according to any one of claims 1 to 7, characterized in that: include: The central control unit is used to establish multiple communication points according to the equipment parameters of the photovoltaic power generation unit; A communication unit, comprising a plurality of communication submodules, wherein the communication submodules are arranged at communication points; The central control unit comprises: The first processing module is used to establish a communication point sequence A, A = (a1, a2 ... ai ... an), where ai is the i-th communication point; n is the number of communication submodules; The second processing module is used to establish a communication path between each communication point and the central control unit, and to build a communication network based on all the communication paths; The third processing module is used to set the communication strategy of each communication point; The maintenance module is used to generate a communication risk value for each communication point according to a preset detection time node, and determine whether to generate a maintenance instruction based on all communication risk values.

9. The photovoltaic power plant internal communication control system according to claim 8, characterized in that: The second processing module is also used for: Establish a communication path sequence B, B = (b1, b2...bi...bn), where bi is the communication path between the i-th communication point and the central control unit; Select the i-th communication path as the target communication path in sequence; Generate a path evaluation value f of the target communication path; Among them, θ1 is the number of the i-th communication evaluation index; ηi is the influencing factor of the i-th communication evaluation index; pi is the reference value of the i-th communication evaluation index in the target communication path; Generate path evaluation values ​​for each communication path in sequence; Establish a path evaluation value sequence F, F = (f1, f2...fi...fn), where fi is the path evaluation value of the i-th communication path; According to the path evaluation value sequence F, the device parameters of each communication path are set in sequence; Build a communication network based on all device parameters.

10. The photovoltaic power plant internal communication control system according to claim 9, characterized in that: The third processing module is also used for: Set the i-th communication point as the target communication point in sequence; Generate a communication evaluation value c of the target communication point according to the operating parameters of the target communication point; Among them, e1 is the preset first weight coefficient; e2 is the preset second weight coefficient; Q1 is the preset first fixed coefficient; Q2 is the preset second coefficient; θ2 is the number of operation evaluation indicators; ki is the reference value of the i-th operation evaluation indicator of the target communication point; βi is the influencing factor of the i-th operation evaluation indicator; f' is the path evaluation value of the communication path between the central control units of the target communication point; According to the communication evaluation value c, the communication strategy of the target communication point is set; Generate communication evaluation values ​​for each communication point in sequence; Establish a communication evaluation value sequence C, C = (c1, c2...ci...cn), where ci is the communication evaluation value of the i-th communication point; Generate communication strategies for each communication point.

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