Joint transmission method and system for multiple emergency power generation equipment

Abstract

The present disclosure provides a joint transmission method and system for multiple emergency power generation equipment, the method comprising: determining the maximum power generation of each emergency power generation equipment in the current control cycle; determining the optimal power supply ratio of each emergency power generation equipment using a preset optimization algorithm according to the energy conversion efficiency of each converter; the optimization algorithm converges when the overall energy conversion efficiency of the multiple emergency power generation equipment is maximum; and sending the optimal power supply ratio of each emergency power generation equipment to each emergency power generation equipment to control the operation of the corresponding emergency power generation equipment.

Description

Technical Field

[0001] The present disclosure relates to the field of emergency power supply, and more specifically, to a joint transmission method and system for multiple emergency power generation equipment. Background Art

[0002] Emergency networking includes different types of distributed sources, such as the difference in output characteristics between emergency diesel generators and distributed inverter-type power supplies. The control methods of distributed inverter-type power supplies are also different, and can be divided into voltage source mode and current source mode distributed power supplies. Generally speaking, in order to achieve autonomous operation of emergency networking, control needs to achieve real-time balance between system active power and reactive power, and ensure multiple goals such as frequency requirements, voltage quality and system stability. Traditional hierarchical control has a clear control structure for load-bearing operation, but it is difficult to balance power regulation and system efficiency optimization. For group control of multiple emergency power supplies, it is necessary to propose an improved optimization control strategy for the overall efficiency optimization of the system. Summary of the invention

[0003] The purpose of the embodiments of the present disclosure is to provide a method and system for joint transmission of multiple emergency power generation equipment to achieve optimal overall efficiency of each emergency power supply.

[0004] In a first aspect, the present invention provides a joint transmission method for multiple emergency power generation equipment, including: each emergency power generation equipment is connected to a DC bus through a converter, and the DC bus is used to connect a load; the joint transmission method includes:

[0005] Determine the maximum power generation capacity of each emergency power generation equipment in the current control cycle according to the current environment information and operating condition information of each emergency power generation equipment;

[0006] According to the energy conversion efficiency of each converter, the optimal power supply ratio of each emergency power generation equipment is determined by using a preset optimization algorithm; the optimization algorithm converges when the overall energy conversion efficiency of multiple emergency power generation equipment is the maximum, and the overall energy conversion efficiency of multiple emergency power generation equipment is the ratio between the sum of the products of the maximum power generation of each emergency power generation equipment in the current control cycle, the power supply ratio to be optimized generated by the optimization algorithm, and the energy conversion efficiency of the corresponding connected converters and the total maximum power generation of each emergency power generation equipment in the current control cycle; the constraint condition of the optimization algorithm is that the sum of the products of the maximum power generation of each emergency power generation equipment in the current control cycle, the power supply ratio to be optimized generated by the optimization algorithm, and the energy conversion efficiency of the corresponding connected converters is greater than or equal to the total power demand of the load in the current control cycle;

[0007] The optimal power supply ratio of each emergency power generation equipment is sent to each emergency power generation equipment to control the operation of the corresponding emergency power generation equipment.

[0008] Further, the multiple emergency power generation equipment includes a DC power generation equipment and an AC power generation equipment; the converter includes a first DC / DC converter and an AC / DC converter;

[0009] The step of determining the optimal power supply ratio of each emergency power generation device using a preset optimization algorithm according to the energy conversion efficiency of each converter includes:

[0010] Determine the optimal power supply ratio of each emergency power generation device using the optimization algorithm according to the first energy conversion efficiency of the first DC / DC converter when the power supply ratio of the direct current power generation device is the first power supply ratio to be optimized generated by the optimization algorithm, and the second energy conversion efficiency of the AC / DC converter when the power supply ratio of the alternating current power generation device is the second power supply ratio to be optimized generated by the optimization algorithm;

[0011] The first energy conversion efficiency of the first DC / DC converter changes as the power supply ratio of the DC power generation device changes; the second energy conversion efficiency of the AC / DC converter changes as the power supply ratio of the AC power generation device changes.

[0012] Furthermore, the preset optimization algorithm is a genetic algorithm;

[0013] The step of determining the optimal power supply ratio of each emergency power generation equipment by using the optimization algorithm according to the first energy conversion efficiency of the first DC / DC converter when the power supply ratio of the direct current power generation equipment is the first power supply ratio to be optimized generated by the optimization algorithm, and the second energy conversion efficiency of the AC / DC converter when the power supply ratio of the alternating current power generation equipment is the second power supply ratio to be optimized generated by the optimization algorithm comprises:

[0014] Calculating the product of the maximum power generation of the DC power generation device in the current control cycle, the first power supply ratio to be found, and the first energy conversion efficiency as the actual power supply of the DC power generation device;

[0015] Calculating the product of the maximum power generation of the AC power generation equipment in the current control cycle, the second power supply ratio to be found optimally, and the second energy conversion efficiency as the actual power supply of the AC power generation equipment;

[0016] Calculating a first sum of actual power supplies of the DC power generation device and the AC power generation device;

[0017] Calculating a second sum of maximum power generation amounts of the DC power generation device and the AC power generation device in a current control cycle;

[0018] The ratio between the first sum and the second sum is used as the fitness of each individual of the optimization algorithm, wherein each individual is a vector composed of the first power supply ratio to be optimized and the first power supply ratio to be optimized, and the dimension of each individual is equal to the number of the multiple emergency power generation equipment;

[0019] The optimization algorithm converges when the ratio between the first sum value and the second sum value is maximum, and the optimal power supply ratio of each emergency power generation equipment is obtained according to the optimal individual when the optimization algorithm converges.

[0020] Furthermore, the various emergency power generation equipment include wind power generation equipment, photovoltaic power generation equipment, energy storage equipment, emergency diesel generators, hydrogen energy equipment and fuel cell equipment.

[0021] Furthermore, the preset optimization algorithm is a multi-objective genetic algorithm.

[0022] In a second aspect, the present invention provides a combined transmission system of multiple emergency power generation equipment, including:

[0023] Multiple converters, DC bus and joint transmission controller; each emergency power generation device is connected to the DC bus through a converter, and the DC bus is used to connect the load;

[0024] The joint transmission controller is used to determine the maximum power generation of each emergency power generation equipment in the current control cycle according to the current environmental information and operating condition information of each emergency power generation equipment; and determine the optimal power supply ratio of each emergency power generation equipment according to the energy conversion efficiency of each converter using a preset optimization algorithm; the optimization algorithm converges when the overall energy conversion efficiency of multiple emergency power generation equipment is the maximum. The overall energy conversion efficiency of the multiple emergency power generation equipment is the ratio between the sum of the products of the maximum power generation of each emergency power generation equipment in the current control cycle, the power supply ratio to be optimized generated by the optimization algorithm, and the energy conversion efficiency of the corresponding connected converters and the total maximum power generation of each emergency power generation equipment in the current control cycle; the constraint condition of the optimization algorithm is that the sum of the products of the maximum power generation of each emergency power generation equipment in the current control cycle, the power supply ratio to be optimized generated by the optimization algorithm, and the energy conversion efficiency of the corresponding connected converters is greater than or equal to the total power demand of the load in the current control cycle; and the optimal power supply ratio of each emergency power generation equipment is sent to each emergency power generation equipment to control the operation of the corresponding emergency power generation equipment.

[0025] Furthermore, the multiple emergency power generation equipment includes DC power generation equipment and AC power generation equipment;

[0026] The multiple converters include a first DC / DC converter and an AC / DC converter; the DC power generation device is connected to the DC bus through the first DC / DC converter, and the AC power generation device is connected to the DC bus through the AC / DC converter;

[0027] The joint transmission controller is connected to the first DC / DC converter and the AC / DC converter respectively, and is further used to determine the optimal power supply ratio of each emergency power generation equipment using the optimization algorithm according to the first energy conversion efficiency of the first DC / DC converter when the power supply ratio of the DC power generation equipment is the first power supply ratio to be optimized generated by the optimization algorithm, and the second energy conversion efficiency of the AC / DC converter when the power supply ratio of the AC power generation equipment is the second power supply ratio to be optimized generated by the optimization algorithm;

[0028] The first energy conversion efficiency of the first DC / DC converter changes as the power supply ratio of the DC power generation device changes; the second energy conversion efficiency of the AC / DC converter changes as the power supply ratio of the AC power generation device changes.

[0029] Furthermore, the preset optimization algorithm is a genetic algorithm;

[0030] The joint transmission controller is specifically used to: calculate the maximum power generation of the DC power generation equipment in the current control cycle, the product of the first power supply ratio to be optimized and the first energy conversion efficiency as the actual power supply of the DC power generation equipment; calculate the maximum power generation of the AC power generation equipment in the current control cycle, the product of the second power supply ratio to be optimized and the second energy conversion efficiency as the actual power supply of the AC power generation equipment; calculate the first sum of the actual power supplies of the DC power generation equipment and the AC power generation equipment; calculate the second sum of the maximum power generation of the DC power generation equipment and the AC power generation equipment in the current control cycle; use the ratio between the first sum and the second sum as the fitness of each individual of the optimization algorithm, wherein each individual is a vector composed of the first power supply ratio to be optimized and the first power supply ratio to be optimized, and the dimension of each individual is equal to the number of the multiple emergency power generation equipment; the optimization algorithm converges when the ratio between the first sum and the second sum is maximum, and the optimal power supply ratio of each emergency power generation equipment is obtained according to the optimal individual when the optimization algorithm converges.

[0031] Furthermore, the plurality of converters further include a DC / AC converter and a second DC / DC converter; the DC bus is connected to an AC load through the DC / AC converter, and the DC bus is connected to a DC load through the second DC / DC converter;

[0032] The joint transmission controller is connected to the DC / AC converter and the second DC / DC converter respectively.

[0033] Furthermore, the various emergency power generation equipment include wind power generation equipment, photovoltaic power generation equipment, energy storage equipment, emergency diesel generators, hydrogen energy equipment and fuel cell equipment.

[0034] The combined transmission method and system of various emergency power generation equipment of the present invention determines the optimal power supply ratio of each emergency power generation equipment by using a preset optimization algorithm according to the energy conversion efficiency of each converter; the optimization algorithm converges when the overall energy conversion efficiency of the various emergency power generation equipment is maximized, thereby determining the optimal power supply ratio of each emergency power generation equipment on the basis of giving priority to maximizing the overall energy conversion efficiency of the various emergency power generation equipment, achieving effective linkage between the overall energy conversion efficiency of each of the various emergency power generation equipment and the optimal power supply ratio of each emergency power generation equipment, and further achieving optimal overall efficiency of each emergency power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 is a flow chart of a joint transmission method of multiple emergency power generation equipment according to an embodiment of the present disclosure.

[0037] Figure 2 It is a structural schematic diagram of a joint transmission system of various emergency power generation equipment according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0038] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0039] It should be noted that the following embodiments and features in the embodiments may be combined with each other in the absence of conflict; and, based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without making any creative work are within the scope of protection of the present disclosure.

[0040] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein may be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present disclosure, it should be understood by those skilled in the art that an aspect described herein may be implemented independently of any other aspect, and two or more of these aspects may be combined in various ways. For example, any number of aspects described herein may be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein may be used to implement this device and / or practice this method.

[0041] Figure 1 1 is a flow chart of a joint transmission method of multiple emergency power generation equipment according to an embodiment of the present disclosure. Each emergency power generation equipment is connected to a DC bus through a converter, and the DC bus is used to connect a load. Figure 1 As shown, the joint transmission method of multiple emergency power generation equipment includes:

[0042] Step 101: Determine the maximum power generation of each emergency power generation device in the current control cycle based on the current environment information and operating condition information of each emergency power generation device. The specific method for determining the maximum power generation is not the focus of this disclosure and reference may be made to the prior art.

[0043] Step 102: According to the energy conversion efficiency of each converter, the optimal power supply ratio of each emergency power generation equipment is determined by using a preset optimization algorithm; the optimization algorithm converges when the overall energy conversion efficiency of multiple emergency power generation equipment is maximum, and the overall energy conversion efficiency of multiple emergency power generation equipment is the ratio between the sum of the products of the maximum power generation of each emergency power generation equipment in the current control cycle, the power supply ratio to be optimized generated by the optimization algorithm, and the energy conversion efficiency of the corresponding connected converters and the total maximum power generation of each emergency power generation equipment in the current control cycle; the constraint condition of the optimization algorithm is that the sum of the products of the maximum power generation of each emergency power generation equipment in the current control cycle, the power supply ratio to be optimized generated by the optimization algorithm, and the energy conversion efficiency of the corresponding connected converters is greater than or equal to the total power demand of the load in the current control cycle.

[0044] Step 103: Sending the optimal power supply ratio of each emergency power generation equipment to each emergency power generation equipment to control the operation of the corresponding emergency power generation equipment.

[0045] This embodiment determines the optimal power supply ratio of each emergency power generation equipment by using a preset optimization algorithm based on the energy conversion efficiency of each converter; the optimization algorithm converges when the overall energy conversion efficiency of the multiple emergency power generation equipment is maximized, thereby determining the optimal power supply ratio of each emergency power generation equipment on the basis of giving priority to maximizing the overall energy conversion efficiency of the multiple emergency power generation equipment, achieving effective linkage between the overall energy conversion efficiency of each of the multiple emergency power generation equipment and the optimal power supply ratio of each emergency power generation equipment, and further achieving optimal overall efficiency of each emergency power supply.

[0046] The above-mentioned joint transmission method of multiple emergency power generation equipment also includes at least one of the following multiple preferred embodiments:

[0047] The first type: the multiple emergency power generation equipment includes a DC power generation equipment and an AC power generation equipment; the converter includes a first DC / DC converter and an AC / DC converter;

[0048] The step of determining the optimal power supply ratio of each emergency power generation device using a preset optimization algorithm according to the energy conversion efficiency of each converter includes:

[0049] Determine the optimal power supply ratio of each emergency power generation device using the optimization algorithm according to the first energy conversion efficiency of the first DC / DC converter when the power supply ratio of the direct current power generation device is the first power supply ratio to be optimized generated by the optimization algorithm, and the second energy conversion efficiency of the AC / DC converter when the power supply ratio of the alternating current power generation device is the second power supply ratio to be optimized generated by the optimization algorithm;

[0050] The first energy conversion efficiency of the first DC / DC converter changes as the power supply ratio of the DC power generation device changes; the second energy conversion efficiency of the AC / DC converter changes as the power supply ratio of the AC power generation device changes.

[0051] The second type: The various emergency power generation equipment include wind power generation equipment, photovoltaic power generation equipment, energy storage equipment, emergency diesel generators, hydrogen energy equipment and fuel cell equipment.

[0052] Furthermore, the first preferred embodiment further includes the following preferred embodiments:

[0053] The preset optimization algorithm is a genetic algorithm; specifically, the preset optimization algorithm may be a multi-objective genetic algorithm;

[0054] The step of determining the optimal power supply ratio of each emergency power generation equipment by using the optimization algorithm according to the first energy conversion efficiency of the first DC / DC converter when the power supply ratio of the direct current power generation equipment is the first power supply ratio to be optimized generated by the optimization algorithm, and the second energy conversion efficiency of the AC / DC converter when the power supply ratio of the alternating current power generation equipment is the second power supply ratio to be optimized generated by the optimization algorithm comprises:

[0055] Calculating the product of the maximum power generation of the DC power generation device in the current control cycle, the first power supply ratio to be found, and the first energy conversion efficiency as the actual power supply of the DC power generation device;

[0056] Calculating the product of the maximum power generation of the AC power generation equipment in the current control cycle, the second power supply ratio to be found optimally, and the second energy conversion efficiency as the actual power supply of the AC power generation equipment;

[0057] Calculating a first sum of actual power supplies of the DC power generation device and the AC power generation device;

[0058] Calculating a second sum of maximum power generation amounts of the DC power generation device and the AC power generation device in a current control cycle;

[0059] The ratio between the first sum and the second sum is used as the fitness of each individual of the optimization algorithm, wherein each individual is a vector composed of the first power supply ratio to be optimized and the first power supply ratio to be optimized, and the dimension of each individual is equal to the number of the multiple emergency power generation equipment; for example, when the multiple emergency power generation equipment includes wind power generation equipment, photovoltaic power generation equipment, energy storage equipment, emergency diesel generators, hydrogen energy equipment and fuel cell equipment, the dimension of each individual is 6, which is expressed as a vector (G1, G2, G3, G4, G5, G6) , G1, G2, G3, G4, G5, G6 in the vector correspond to the power supply proportions of wind power generation equipment, photovoltaic power generation equipment, energy storage equipment, emergency diesel generator, hydrogen energy equipment and fuel cell equipment respectively; if the estimated power generation of wind power generation equipment, photovoltaic power generation equipment, energy storage equipment, emergency diesel generator, hydrogen energy equipment and fuel cell equipment in the current control cycle is expressed as F1, F2, F3, F4, F5, F6 respectively, and the total power demand in the current control cycle is expressed as Q, then the fitness of each individual is calculated according to 1 / ((F1G1+F2G2+F3G3+F4 G4+F5 G5+F6 G6)-Q);

[0060] The optimization algorithm converges when the ratio between the first sum and the second sum is the largest, and the optimal power supply ratio of each emergency power generation equipment is obtained according to the optimal individual when the optimization algorithm converges. In this way, by continuously optimizing the calculation using the genetic algorithm model until the genetic algorithm model converges, the individual with the maximum fitness is obtained as the optimal power supply ratio of wind power generation equipment, photovoltaic power generation equipment, energy storage equipment, emergency diesel generator, hydrogen energy equipment and fuel cell equipment.

[0061] Figure 2 is a structural diagram of a joint transmission system of various emergency power generation equipment according to an embodiment of the present disclosure. Figure 1 The embodiment shown can be used to explain this embodiment. Figure 2 Shown: A combined transmission system of multiple emergency power generation equipment, including:

[0062] Multiple converters, DC bus and joint transmission controller; each emergency power generation device is connected to the DC bus through a converter, and the DC bus is used to connect the load;

[0063] The joint transmission controller is used to determine the maximum power generation of each emergency power generation equipment in the current control cycle according to the current environmental information and operating condition information of each emergency power generation equipment; and determine the optimal power supply ratio of each emergency power generation equipment according to the energy conversion efficiency of each converter using a preset optimization algorithm; the optimization algorithm converges when the overall energy conversion efficiency of multiple emergency power generation equipment is the maximum. The overall energy conversion efficiency of the multiple emergency power generation equipment is the ratio between the sum of the products of the maximum power generation of each emergency power generation equipment in the current control cycle, the power supply ratio to be optimized generated by the optimization algorithm, and the energy conversion efficiency of the corresponding connected converters and the total maximum power generation of each emergency power generation equipment in the current control cycle; the constraint condition of the optimization algorithm is that the sum of the products of the maximum power generation of each emergency power generation equipment in the current control cycle, the power supply ratio to be optimized generated by the optimization algorithm, and the energy conversion efficiency of the corresponding connected converters is greater than or equal to the total power demand of the load in the current control cycle; and the optimal power supply ratio of each emergency power generation equipment is sent to each emergency power generation equipment to control the operation of the corresponding emergency power generation equipment.

[0064] Preferably, the multiple emergency power generation equipment includes DC power generation equipment and AC power generation equipment;

[0065] The multiple converters include a first DC / DC converter and an AC / DC converter; the DC power generation device is connected to the DC bus through the first DC / DC converter, and the AC power generation device is connected to the DC bus through the AC / DC converter;

[0066] The joint transmission controller is connected to the first DC / DC converter and the AC / DC converter respectively, and is further used to determine the optimal power supply ratio of each emergency power generation equipment using the optimization algorithm according to the first energy conversion efficiency of the first DC / DC converter when the power supply ratio of the DC power generation equipment is the first power supply ratio to be optimized generated by the optimization algorithm, and the second energy conversion efficiency of the AC / DC converter when the power supply ratio of the AC power generation equipment is the second power supply ratio to be optimized generated by the optimization algorithm;

[0067] The first energy conversion efficiency of the first DC / DC converter changes as the power supply ratio of the DC power generation device changes; the second energy conversion efficiency of the AC / DC converter changes as the power supply ratio of the AC power generation device changes.

[0068] Preferably, the preset optimization algorithm is a genetic algorithm;

[0069] The joint transmission controller is specifically used to: calculate the maximum power generation of the DC power generation equipment in the current control cycle, the product of the first power supply ratio to be optimized and the first energy conversion efficiency as the actual power supply of the DC power generation equipment; calculate the maximum power generation of the AC power generation equipment in the current control cycle, the product of the second power supply ratio to be optimized and the second energy conversion efficiency as the actual power supply of the AC power generation equipment; calculate the first sum of the actual power supplies of the DC power generation equipment and the AC power generation equipment; calculate the second sum of the maximum power generation of the DC power generation equipment and the AC power generation equipment in the current control cycle; use the ratio between the first sum and the second sum as the fitness of each individual of the optimization algorithm, wherein each individual is a vector composed of the first power supply ratio to be optimized and the first power supply ratio to be optimized, and the dimension of each individual is equal to the number of the multiple emergency power generation equipment; the optimization algorithm converges when the ratio between the first sum and the second sum is maximum, and the optimal power supply ratio of each emergency power generation equipment is obtained according to the optimal individual when the optimization algorithm converges.

[0070] Preferably, the plurality of converters further include a DC / AC converter and a second DC / DC converter; the DC bus is connected to an AC load through the DC / AC converter, and the DC bus is connected to a DC load through the second DC / DC converter;

[0071] The joint transmission controller is connected to the DC / AC converter and the second DC / DC converter respectively.

[0072] Preferably, the various emergency power generation equipment include wind power generation equipment, photovoltaic power generation equipment, energy storage equipment, emergency diesel generator vehicles, hydrogen energy equipment and fuel cell equipment.

[0073] This embodiment determines the optimal power supply ratio of each emergency power generation equipment by using a preset optimization algorithm based on the energy conversion efficiency of each converter; the optimization algorithm converges when the overall energy conversion efficiency of the multiple emergency power generation equipment is maximized, thereby determining the optimal power supply ratio of each emergency power generation equipment on the basis of giving priority to maximizing the overall energy conversion efficiency of the multiple emergency power generation equipment, achieving effective linkage between the overall energy conversion efficiency of each of the multiple emergency power generation equipment and the optimal power supply ratio of each emergency power generation equipment, and further achieving optimal overall efficiency of each emergency power supply.

[0074] In this case, the program code itself read from the storage medium can realize the function of any one of the above-mentioned embodiments, and thus the program code and the storage medium storing the program code constitute a part of the present invention.

[0075] The storage medium embodiments for providing the program code include a floppy disk, a hard disk, a magneto-optical disk, an optical disk (such as CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-RAM, DVD-RW, DVD+RW), a magnetic tape, a non-volatile memory card, and a ROM. Alternatively, the program code can be downloaded from a server computer by a communication network.

[0076] In addition, it should be clear that the functions of any of the above embodiments can be implemented not only by executing the program code read by the computer, but also by enabling an operating system operating on the computer to complete part or all of the actual operations based on instructions from the program code.

[0077] In addition, it can be understood that the program code read from the storage medium is written to a memory provided in an expansion board inserted into the computer or written to a memory provided in an expansion unit connected to the computer, and then based on the instructions of the program code, a CPU installed on the expansion board or the expansion unit is enabled to perform part or all of the actual operations, thereby realizing the functions of any of the above-mentioned embodiments.

[0078] It should be noted that not all steps and modules in the above-mentioned processes and system structure diagrams are necessary, and some steps or modules can be ignored according to actual needs. The execution order of each step is not fixed and can be adjusted as needed. The system structure described in the above-mentioned embodiments can be a physical structure or a logical structure, that is, some modules may be implemented by the same physical entity, or some modules may be implemented by multiple physical entities, or some components in multiple independent devices may be implemented together.

[0079] In the above embodiments, the hardware unit can be realized by mechanical means or electrical means. For example, a hardware unit can include permanent dedicated circuits or logic (such as special processors, FPGA or ASIC) to complete the corresponding operation. The hardware unit can also include programmable logic or circuits (such as general-purpose processors or other programmable processors), which can be temporarily set by software to complete the corresponding operation. Concrete implementation (mechanical means or dedicated permanent circuits or temporarily set circuits) can be determined based on cost and time considerations.

[0080] The present invention is shown and described in detail above through the accompanying drawings and preferred embodiments. However, the present invention is not limited to these disclosed embodiments. Based on the above multiple embodiments, those skilled in the art can know that the code review methods in the above different embodiments can be combined to obtain more embodiments of the present invention, and these embodiments are also within the protection scope of the present invention.

Claims

1. A joint transmission method for multiple emergency power generation equipment, characterized in that: Each emergency power generation device is connected to a DC bus through a converter, and the DC bus is used to connect a load; the joint transmission method includes: Determine the maximum power generation capacity of each emergency power generation equipment in the current control cycle according to the current environment information and operating condition information of each emergency power generation equipment; According to the energy conversion efficiency of each converter, the optimal power supply ratio of each emergency power generation equipment is determined by using a preset optimization algorithm; the optimization algorithm converges when the overall energy conversion efficiency of multiple emergency power generation equipment is the maximum, and the overall energy conversion efficiency of multiple emergency power generation equipment is the ratio between the sum of the products of the maximum power generation of each emergency power generation equipment in the current control cycle, the power supply ratio to be optimized generated by the optimization algorithm, and the energy conversion efficiency of the corresponding connected converters and the total maximum power generation of each emergency power generation equipment in the current control cycle; the constraint condition of the optimization algorithm is that the sum of the products of the maximum power generation of each emergency power generation equipment in the current control cycle, the power supply ratio to be optimized generated by the optimization algorithm, and the energy conversion efficiency of the corresponding connected converters is greater than or equal to the total power demand of the load in the current control cycle; The optimal power supply ratio of each emergency power generation equipment is sent to each emergency power generation equipment to control the operation of the corresponding emergency power generation equipment. The multiple emergency power generation equipment includes a DC power generation equipment and an AC power generation equipment; the converter includes a first DC / DC converter and an AC / DC converter; The step of determining the optimal power supply ratio of each emergency power generation device using a preset optimization algorithm according to the energy conversion efficiency of each converter includes: Determine the optimal power supply ratio of each emergency power generation device using the optimization algorithm according to the first energy conversion efficiency of the first DC / DC converter when the power supply ratio of the direct current power generation device is the first power supply ratio to be optimized generated by the optimization algorithm, and the second energy conversion efficiency of the AC / DC converter when the power supply ratio of the alternating current power generation device is the second power supply ratio to be optimized generated by the optimization algorithm; The first energy conversion efficiency of the first DC / DC converter changes as the power supply ratio of the DC power generation device changes; the second energy conversion efficiency of the AC / DC converter changes as the power supply ratio of the AC power generation device changes, and the preset optimization algorithm is a genetic algorithm; The step of determining the optimal power supply ratio of each emergency power generation equipment by using the optimization algorithm according to the first energy conversion efficiency of the first DC / DC converter when the power supply ratio of the direct current power generation equipment is the first power supply ratio to be optimized generated by the optimization algorithm, and the second energy conversion efficiency of the AC / DC converter when the power supply ratio of the alternating current power generation equipment is the second power supply ratio to be optimized generated by the optimization algorithm comprises: Calculating the product of the maximum power generation of the DC power generation device in the current control cycle, the first power supply ratio to be found, and the first energy conversion efficiency as the actual power supply of the DC power generation device; Calculating the product of the maximum power generation of the AC power generation equipment in the current control cycle, the second power supply ratio to be found, and the second energy conversion efficiency as the actual power supply of the AC power generation equipment; Calculating a first sum of actual power supplies of the DC power generation device and the AC power generation device; Calculating a second sum of maximum power generation amounts of the DC power generation device and the AC power generation device in a current control cycle; The ratio between the first sum and the second sum is used as the fitness of each individual of the optimization algorithm, wherein each individual is a vector composed of the first power supply ratio to be optimized and the first power supply ratio to be optimized, and the dimension of each individual is equal to the number of the multiple emergency power generation equipment; The optimization algorithm converges when the ratio between the first sum value and the second sum value is maximum, and the optimal power supply ratio of each emergency power generation equipment is obtained according to the optimal individual when the optimization algorithm converges.

2. The joint transmission method of multiple emergency power generation equipment according to claim 1 is characterized in that: The various emergency power generation equipment include wind power generation equipment, photovoltaic power generation equipment, energy storage equipment, emergency diesel generators, hydrogen energy equipment and fuel cell equipment.

3. The joint transmission method of multiple emergency power generation equipment according to claim 2 is characterized in that: The preset optimization algorithm is a multi-objective genetic algorithm.

4. A combined transmission system for multiple emergency power generation equipment, characterized in that: include: Multiple converters, DC bus and joint transmission controller; each emergency power generation device is connected to the DC bus through a converter, and the DC bus is used to connect the load; The joint transmission controller is used to determine the maximum power generation of each emergency power generation equipment in the current control cycle according to the current environment information and operating condition information of each emergency power generation equipment; and determine the optimal power supply ratio of each emergency power generation equipment according to the energy conversion efficiency of each converter using a preset optimization algorithm; the optimization algorithm converges when the overall energy conversion efficiency of multiple emergency power generation equipment is the maximum. The overall energy conversion efficiency of the multiple emergency power generation equipment is the ratio between the sum of the products of the maximum power generation of each emergency power generation equipment in the current control cycle, the power supply ratio to be optimized generated by the optimization algorithm, and the energy conversion efficiency of the corresponding connected converters and the total maximum power generation of each emergency power generation equipment in the current control cycle; the constraint condition of the optimization algorithm is that the sum of the products of the maximum power generation of each emergency power generation equipment in the current control cycle, the power supply ratio to be optimized generated by the optimization algorithm, and the energy conversion efficiency of the corresponding connected converters is greater than or equal to the total power demand of the load in the current control cycle; and the optimal power supply ratio of each emergency power generation equipment is sent to each emergency power generation equipment to control the operation of the corresponding emergency power generation equipment, The various emergency power generation equipment include DC power generation equipment and AC power generation equipment; The multiple converters include a first DC / DC converter and an AC / DC converter; the DC power generation device is connected to the DC bus through the first DC / DC converter, and the AC power generation device is connected to the DC bus through the AC / DC converter; The joint transmission controller is connected to the first DC / DC converter and the AC / DC converter respectively, and is further used to determine the optimal power supply ratio of each emergency power generation equipment using the optimization algorithm according to the first energy conversion efficiency of the first DC / DC converter when the power supply ratio of the DC power generation equipment is the first power supply ratio to be optimized generated by the optimization algorithm, and the second energy conversion efficiency of the AC / DC converter when the power supply ratio of the AC power generation equipment is the second power supply ratio to be optimized generated by the optimization algorithm; The first energy conversion efficiency of the first DC / DC converter changes as the power supply ratio of the DC power generation device changes; the second energy conversion efficiency of the AC / DC converter changes as the power supply ratio of the AC power generation device changes, The preset optimization algorithm is a genetic algorithm; The joint transmission controller is specifically used to: calculate the maximum power generation of the DC power generation equipment in the current control cycle, the product of the first power supply ratio to be optimized and the first energy conversion efficiency as the actual power supply of the DC power generation equipment; calculate the maximum power generation of the AC power generation equipment in the current control cycle, the product of the second power supply ratio to be optimized and the second energy conversion efficiency as the actual power supply of the AC power generation equipment; calculate the first sum of the actual power supplies of the DC power generation equipment and the AC power generation equipment; Calculating a second sum of maximum power generation amounts of the DC power generation device and the AC power generation device in a current control cycle; The ratio between the first sum and the second sum is used as the fitness of each individual of the optimization algorithm, wherein each individual is a vector composed of the first power supply ratio to be optimized and the first power supply ratio to be optimized, and the dimension of each individual is equal to the number of the multiple emergency power generation equipment; the optimization algorithm converges when the ratio between the first sum and the second sum is maximum, and the optimal power supply ratio of each emergency power generation equipment is obtained according to the optimal individual when the optimization algorithm converges.

5. The combined transmission system of multiple emergency power generation equipment according to claim 4, characterized in that: The multiple converters further include a DC / AC converter and a second DC / DC converter; the DC bus is connected to an AC load through the DC / AC converter, and the DC bus is connected to a DC load through the second DC / DC converter; The joint transmission controller is connected to the DC / AC converter and the second DC / DC converter respectively.

6. The combined transmission system of multiple emergency power generation equipment according to claim 5, characterized in that: The various emergency power generation equipment include wind power generation equipment, photovoltaic power generation equipment, energy storage equipment, emergency diesel generators, hydrogen energy equipment and fuel cell equipment.

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