Micro-grid and power grid integrated optimization method based on smart island interconnection device

Abstract

The invention discloses a micro-grid and power grid integration optimization method based on an intelligent island interconnection device, and relates to the technical field of power systems and automation thereof, and the method comprises the steps: designing the intelligent island interconnection device: selecting a proper intelligent switch and a proper power electronic converter, and guaranteeing that the intelligent switch and the power electronic converter are suitable for specific micro-grid and power grid integration demands; an intelligent island interconnection device is installed, system integration is carried out, electric energy flow and electric energy quality data are collected in real time through monitoring infrastructures, a dynamic adjustment algorithm is developed, comparison is carried out according to real-time monitoring data and a set threshold value, control logic is automatically adjusted, and an optimization and feedback adjustment mechanism is constructed. According to the invention, through real-time data monitoring and dynamic adjustment of control logic, optimal distribution of electric energy is realized, energy utilization efficiency is improved, power loss is reduced, a flexible adjustment mechanism is provided, and the system can rapidly respond to changes of an external environment.

Description

Technical Field

[0001] The present invention relates to the technical field of power systems and their automation, and in particular to a method for optimizing the integration of a microgrid and a power grid based on a smart island interconnection device. Background Art

[0002] With the rapid development of renewable energy and the widespread application of distributed energy resources, microgrids, as an important part of the new power system, have gradually received attention. Microgrids can achieve local energy production, storage and consumption, improve energy efficiency, and reduce the burden on traditional power grids. However, the integration and optimization of microgrids face a series of technical challenges, including dynamic changes in power flow, system stability assurance, and seamless connection with the public power grid.

[0003] Traditional power system optimization methods are mainly based on centralized power generation and power dispatching, and lack the ability to effectively respond to the rapid changes of microgrids and distributed energy. This makes the integration process of microgrids and power grids particularly complicated in practical applications. In particular, how to efficiently manage and control power flow while achieving power quality assurance and grid security has become a problem that needs to be solved in the current technical field. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the above problems in the prior art, the present invention is proposed.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a microgrid and power grid integration optimization method based on a smart island interconnection device, the method comprising the following steps:

[0007] Step 1: Design smart island interconnection devices: Select appropriate smart switches and power electronic converters to ensure they are suitable for specific microgrid and grid integration requirements, and determine the communication protocol of the equipment to achieve compatibility with the monitoring infrastructure;

[0008] Step 2: Install the smart island interconnection device, perform system integration, configure the current parameters of the equipment, and ensure seamless connection with the power grid;

[0009] Step 3: Collect power flow and power quality data in real time through monitoring infrastructure, develop dynamic adjustment algorithms, compare real-time monitoring data with set thresholds, and automatically adjust control logic;

[0010] Step 4: Build an optimization and feedback adjustment mechanism to continuously optimize the control logic algorithm of the smart island interconnection device based on monitoring data and operation feedback.

[0011] As a preferred solution of the microgrid and power grid integration optimization method based on the smart island interconnection device of the present invention, in which: in the process of step 2, the current parameters of the equipment are configured to ensure that the equipment can respond to the changes in the power grid state and the load demand in real time, which is expressed by the following formula:

[0012]

[0013] Among them, I total (t) represents the total current of the microgrid at time t, I n (t) is the current of the nth load at time t, T is the total time of the monitoring cycle, t n is the response time of the nth load, τ is the time constant, and N is the number of loads. This formula reflects the contribution of all loads in the microgrid to the overall current through integration and summation, and can effectively monitor the dynamic characteristics of power flow.

[0014] As a preferred solution of the microgrid and power grid integration optimization method based on the smart island interconnection device of the present invention, in which: in the step three, the dynamic adjustment algorithm formula is:

[0015]

[0016] Where C(t) represents the control parameter, P opt (t) represents the optimized power distribution, P total (t) represents the current total power flow, V(t) represents the current voltage, V set represents the set target voltage, α and β represent adjustment factors, which weigh the effects of voltage and current respectively, I threshold Indicates the set current threshold.

[0017] As a preferred solution of the microgrid and power grid integrated optimization method based on the smart island interconnection device of the present invention, the optimization and feedback adjustment mechanism of step 4 includes: establishing a real-time feedback channel, connecting the operating status with the control logic algorithm, and setting the following feedback rules to be expressed as:

[0018]

[0019] H(I total (t)) represents the current operating status value of the microgrid.

[0020] As a preferred solution of the microgrid and power grid integration optimization method based on the smart island interconnection device of the present invention, the control parameter is updated according to the feedback rule, and its expression is:

[0021] C new =C old +η·H(I total (t))·|I total (t)-I threshold |

[0022] Among them, C new represents the updated control parameters, C old represents the control parameter before updating, and η represents the learning rate, which determines the update amplitude.

[0023] As a preferred solution of the microgrid and power grid integration optimization method based on the smart island interconnection device of the present invention, if C new Greater than the set high threshold C high , then it is determined that the control logic is effective in adjusting the power flow;

[0024] If C new Less than the set low threshold C low , then it is determined that the adjustment strategy of the control logic needs to be improved;

[0025] If C new In C high and C low If the current control logic is within the acceptable range, the control parameters are continuously monitored and dynamically adjusted according to the operation feedback.

[0026] As a preferred solution of the microgrid and power grid integration optimization method based on the smart island interconnection device of the present invention, if P opt If the difference between (t) and the set target power exceeds the set error threshold ∈, the power distribution is judged to be unreasonable, and the control parameter C is re-evaluated and adjusted. new To ensure that P opt (t) stability;

[0027] If N times in a row P opt (t) and I total (t) If the preset load state is reached without triggering the threshold, the optimization effect is determined to be good, the weight and trust of the control logic are increased, and the optimization effect is recorded for subsequent reference;

[0028] If P opt If the optimization result of (t) does not meet expectations and triggers an alarm mechanism, it is determined that the entire system configuration needs to be re-evaluated.

[0029] The optimization system of the microgrid and power grid integrated optimization method based on the smart island interconnection device as described above includes:

[0030] The data acquisition module collects the current, voltage, power and other power flow data of the microgrid and the power grid in real time, as well as the power quality parameters; the communication and control module connects with the monitoring infrastructure through the communication protocol to ensure the real-time and reliability of data transmission;

[0031] Intelligent decision-making module, based on collected data and set thresholds, dynamically adjusts control logic algorithms, optimizes power distribution, and ensures stable connection between microgrid and grid;

[0032] Monitoring and early warning module, which monitors power flow and power quality in real time, identifies abnormal conditions and triggers early warnings to ensure the safety of system operation;

[0033] As well as the optimization and feedback module, it continuously optimizes the control logic algorithm based on operation feedback and monitoring data to improve system performance and adaptability.

[0034] A computer device includes a memory and a processor, wherein the memory stores a computer program, and is characterized in that when the processor executes the computer program, the steps of the above-mentioned microgrid and power grid integration optimization method based on a smart island interconnection device are implemented.

[0035] A computer-readable storage medium having a computer program stored thereon, characterized in that: when the computer program is executed by a processor, the steps of the above-mentioned microgrid and power grid integration optimization method based on a smart island interconnection device are implemented.

[0036] Beneficial effects of the present invention:

[0037] 1. Improve system stability: Through the optimized design of the smart island interconnection device, the efficient integration of microgrid and power grid is achieved, which effectively ensures the stability and security of the power system;

[0038] 2. Simplify the integration process: This method achieves seamless connection between microgrid and grid through intelligent switches and power electronic converters, significantly reducing the complexity of system integration;

[0039] 3. Optimize power distribution: Through real-time data monitoring and dynamic adjustment of control logic, the optimal distribution of power is achieved, the energy utilization efficiency is improved, and the power loss is reduced;

[0040] 4. Enhanced adaptive capability: In response to the ever-changing load and power demand, this method provides a flexible adjustment mechanism, enabling the system to respond quickly to changes in the external environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0042] Figure 1 This is a flow chart of the microgrid and power grid integration optimization method based on the smart island interconnection device proposed in the present invention. DETAILED DESCRIPTION

[0043] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0044] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0045] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0046] Reference Figure 1 , is an embodiment of the present invention, and provides a microgrid and power grid integration optimization method based on a smart island interconnection device, the method comprising the following steps:

[0047] Step 1: Design smart island interconnection devices: Select appropriate smart switches and power electronic converters to ensure they are suitable for specific microgrid and grid integration requirements, and determine the communication protocol of the equipment to achieve compatibility with the monitoring infrastructure;

[0048] Step 2: Install the smart island interconnection device, perform system integration, configure the current parameters of the equipment, and ensure seamless connection with the power grid.

[0049] Specifically, the current parameters of the equipment are configured through the integrated interconnection device to ensure that the equipment can respond to changes in the grid state and load demand in real time, which is expressed by the following formula:

[0050]

[0051] Among them, I total(t) represents the total current of the microgrid at time t, I n (t) is the current of the nth load at time t, T is the total time of the monitoring cycle, t n is the response time of the nth load, τ is the time constant, and N is the number of loads. This formula reflects the contribution of all loads in the microgrid to the overall current through integration and summation, and can effectively monitor the dynamic characteristics of power flow.

[0052] By combining the above formulas, it is possible to ensure that the smart island interconnection device operates within the safety standards of the power company and optimize power distribution and quality control.

[0053] Step 3: Collect power flow and power quality data in real time through monitoring infrastructure, develop dynamic adjustment algorithms, compare real-time monitoring data with set thresholds, and automatically adjust control logic;

[0054] The dynamic adjustment algorithm formula is:

[0055]

[0056] Where C(t) represents the control parameter, P opt (t) represents the optimized power distribution, P total (t) represents the current total power flow, V(t) represents the current voltage, V set represents the set target voltage, α and β represent adjustment factors, which weigh the effects of voltage and current respectively, I threshold Indicates the set current threshold.

[0057] Step 4: Build an optimization and feedback adjustment mechanism to continuously optimize the control logic algorithm of the smart island interconnection device based on monitoring data and operation feedback.

[0058] The optimization and feedback adjustment mechanism includes: establishing a real-time feedback channel, connecting the operating status with the control logic algorithm, and setting the following feedback rules as:

[0059]

[0060] H(I total (t)) represents the current operating status value of the microgrid.

[0061] The control parameters are updated according to the feedback rule, and the expression is:

[0062] C new =C old +η·H(I total (t))·|I total (t)-I threshold |

[0063] Among them, Cnew represents the updated control parameters, C old represents the control parameter before updating, and η represents the learning rate, which determines the update amplitude.

[0064] By incorporating the control parameters into the optimization formula P opt The calculation of (t) can realize the continuous optimization of the control logic algorithm, ensuring the scientificity and consistency of each link, so that the smart island interconnection device can maintain efficient power distribution and system stability in a constantly changing operating environment.

[0065] The data obtained from the above calculation formula meets the following rules:

[0066] If C new Greater than the set high threshold C high , then it is determined that the control logic is effective in adjusting the power flow;

[0067] If C new Less than the set low threshold C low , then it is determined that the adjustment strategy of the control logic needs to be improved;

[0068] If C new In C high and C low If the current control logic is within the acceptable range, the control parameters are continuously monitored and dynamically adjusted according to the operation feedback.

[0069] If P opt If the difference between (t) and the set target power exceeds the set error threshold ∈, the power distribution is judged to be unreasonable, and the control parameter C is re-evaluated and adjusted. new To ensure that P opt (t) stability;

[0070] If N times in a row P opt (t) and I total (t) If the preset load state is reached without triggering the threshold, the optimization effect is determined to be good, the weight and trust of the control logic are increased, and the optimization effect is recorded for subsequent reference;

[0071] If P opt If the optimization result of (t) does not meet expectations and triggers an alarm mechanism, it is determined that the entire system configuration needs to be re-evaluated.

[0072] Through these interaction rules, the integration process of microgrid and power grid can be effectively managed and optimized, ensuring that power distribution, control parameters and optimization strategies can maintain the best state under changing load conditions. This not only promotes the adaptive ability of the system, but also provides a basis for further performance improvement.

[0073] This embodiment also provides an integrated optimization system for a microgrid and power grid integrated optimization method based on a smart island interconnection device, which is applied to the integrated optimization method for a microgrid and power grid integrated optimization method based on a smart island interconnection device, and the system includes:

[0074] The data acquisition module collects the current, voltage, power and other power flow data of the microgrid and the power grid in real time, as well as the power quality parameters; the communication and control module connects to the monitoring infrastructure through communication protocols (such as DNP3 or IEC 61850) to ensure the real-time and reliability of data transmission; the intelligent decision-making module dynamically adjusts the control logic algorithm based on the collected data and the set thresholds, optimizes the power distribution, and ensures the stable connection between the microgrid and the power grid.

[0075] The monitoring and early warning module monitors the power flow and power quality in real time, identifies abnormal conditions and triggers early warnings to ensure the safety of system operation; and the optimization and feedback module continuously optimizes the control logic algorithm based on operation feedback and monitoring data to improve system performance and adaptability.

[0076] In summary, the present invention realizes efficient integration of microgrid and power grid through the optimized design of smart island interconnection device, effectively ensuring the stability and safety of the power system; the method realizes seamless connection between microgrid and power grid through intelligent switches and power electronic converters, significantly reducing the complexity of system integration; through real-time data monitoring and dynamic adjustment of control logic, it realizes optimal distribution of electric energy, improves energy utilization efficiency and reduces power loss; in response to the ever-changing load and power demand, the method provides a flexible adjustment mechanism, enabling the system to respond quickly to changes in the external environment.

[0077] This embodiment also provides a computer device, which is suitable for the case of a microgrid and power grid integrated optimization method based on a smart island interconnection device, including: a memory and a processor; the memory is used to store computer executable instructions, and the processor is used to execute computer executable instructions to implement the microgrid and power grid integrated optimization method based on a smart island interconnection device as proposed in the above embodiment.

[0078] The computer device may be a terminal, and the computer device includes a processor, a memory, a communication interface, a display screen and an input device connected via a system bus. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be achieved through WIFI, an operator network, NFC (near field communication) or other technologies. The display screen of the computer device may be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device may be a touch layer covering the display screen, or a key, trackball or touchpad provided on the housing of the computer device, or an external keyboard, touchpad or mouse, etc.

[0079] This embodiment also provides a storage medium on which a computer program is stored. When the program is executed by a processor, the microgrid and power grid integration optimization method based on the smart island interconnection device as proposed in the above embodiment is implemented; the storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (Static Random Access Memory, referred to as SRAM), electrically erasable programmable read-only memory (Electrically Erasable Programmable Read-Only Memory, referred to as EEPROM), erasable programmable read-only memory (Erasable Programmable Read Only Memory, referred to as EPROM), programmable read-only memory (Programmable Red-Only Memory, referred to as PROM), read-only memory (Read-Only Memory, referred to as ROM), magnetic storage, flash memory, disk or optical disk.

[0080] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A microgrid and power grid integration optimization method based on a smart island interconnection device, characterized in that: The method comprises the following steps: Step 1: Design smart island interconnection devices: Select appropriate smart switches and power electronic converters to ensure they are suitable for specific microgrid and grid integration requirements, and determine the communication protocol of the equipment to achieve compatibility with the monitoring infrastructure; Step 2: Install the smart island interconnection device, perform system integration, configure the current parameters of the equipment, and ensure seamless connection with the power grid; Step 3: Collect power flow and power quality data in real time through monitoring infrastructure, develop dynamic adjustment algorithms, compare real-time monitoring data with set thresholds, and automatically adjust control logic; Step 4: Build an optimization and feedback adjustment mechanism to continuously optimize the control logic algorithm of the smart island interconnection device based on monitoring data and operation feedback.

2. The microgrid and power grid integration optimization method based on the smart island interconnection device according to claim 1 is characterized in that: In the process of step 2, the current parameters of the device are configured to ensure that the device can respond to changes in the power grid state and load demand in real time, which is expressed by the following formula: Among them, I total (t) represents the total current of the microgrid at time t, I n (t) is the current of the nth load at time t, T is the total time of the monitoring cycle, t n is the response time of the nth load, τ is the time constant, and N is the number of loads. This formula reflects the contribution of all loads in the microgrid to the overall current through integration and summation, and can effectively monitor the dynamic characteristics of power flow.

3. The microgrid and power grid integration optimization method based on the smart island interconnection device according to claim 2 is characterized by: In the process of step 3, the dynamic adjustment algorithm formula is: Where C(t) represents the control parameter, P opt (t) represents the optimized power distribution, P total (t) represents the current total power flow, V(t) represents the current voltage, V set represents the set target voltage, α and β represent adjustment factors, which weigh the effects of voltage and current respectively, I threshold Indicates the set current threshold.

4. The microgrid and power grid integration optimization method based on the smart island interconnection device according to claim 3 is characterized by: The optimization and feedback adjustment mechanism of step 4 includes: establishing a real-time feedback channel, connecting the operating status with the control logic algorithm, and setting the following feedback rules as: H(I total (t)) represents the current operating status value of the microgrid.

5. The microgrid and power grid integration optimization method based on the smart island interconnection device according to claim 4 is characterized in that: The control parameters are updated according to the feedback rule, and the expression is: C new =C old +η·H(I total (t))·|I total (t)-I threshold | Among them, C new represents the updated control parameters, C old represents the control parameter before updating, and η represents the learning rate, which determines the update amplitude.

6. The microgrid and power grid integration optimization method based on the smart island interconnection device according to claim 5 is characterized by: If C new Greater than the set high threshold C high , then it is determined that the control logic is effective in adjusting the power flow; If C new Less than the set low threshold C low , then it is determined that the adjustment strategy of the control logic needs to be improved; If C new In C high and C low If the current control logic is within the acceptable range, the control parameters are continuously monitored and dynamically adjusted according to the operation feedback.

7. The microgrid and power grid integrated optimization method based on the smart island interconnection device according to claim 6 is characterized by: If P opt If the difference between (t) and the set target power exceeds the set error threshold ∈, the power distribution is judged to be unreasonable, and the control parameter C is re-evaluated and adjusted. new To ensure that P opt (t) stability; If N times in a row P opt (t) and I total (t) If the preset load state is reached without triggering the threshold, the optimization effect is determined to be good, the weight and trust of the control logic are increased, and the optimization effect is recorded for subsequent reference; If P opt If the optimization result of (t) does not meet expectations and triggers an alarm mechanism, it is determined that the entire system configuration needs to be re-evaluated.

8. The integrated optimization system of the microgrid and power grid integrated optimization method based on the smart island interconnection device according to claim 7 is characterized by: The system includes: The data acquisition module collects the current, voltage, power and other power flow data of the microgrid and the power grid in real time, as well as the power quality parameters; the communication and control module connects with the monitoring infrastructure through the communication protocol to ensure the real-time and reliability of data transmission; Intelligent decision-making module, based on collected data and set thresholds, dynamically adjusts control logic algorithms, optimizes power distribution, and ensures stable connection between microgrid and grid; Monitoring and early warning module, which monitors power flow and power quality in real time, identifies abnormal conditions and triggers early warnings to ensure the safety of system operation; As well as the optimization and feedback module, it continuously optimizes the control logic algorithm based on operation feedback and monitoring data to improve system performance and adaptability.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the microgrid and power grid integration optimization method based on the smart island interconnection device according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the microgrid and power grid integration optimization method based on a smart island interconnection device according to any one of claims 1 to 7 are implemented.

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