Power supply method based on preferential distribution of street lamp side energy storage power supply to city sensing device

Abstract

The invention relates to a city sensing device power supply method based on priority distribution of a street lamp side energy storage power supply. The method comprises the following steps: establishing a classified electric appliance power supply label and an electric appliance energy consumption model for a roadside power system in a street lamp side energy storage power supply coverage area; acquiring a current power supply state of a street lamp side energy storage power supply coverage area; determining a power supply mode according to the current power supply state of the street lamp side energy storage power supply coverage area: if the street lamp side energy storage power supply coverage area is in a normal power supply state, optimizing the power supply cost in real time by a power supply system, and monitoring the state of an electric appliance in real time; and if the street lamp side energy storage power supply coverage area has a power supply fault, the energy storage power supply and the electric appliances form a regional micro-grid, and the electric energy of the energy storage power supply performs cascade distribution on the power supply of the electric appliances according to the power supply priorities of the electric appliances. According to the invention, a classified electric appliance power supply label and an electric appliance energy consumption model are established, and intelligent management and monitoring of the electric appliance are realized.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply, and in particular to a method for supplying power to a city sensing device based on priority distribution of energy storage power sources on the side of street lamps. Background Art

[0002] In today's cities, although the power supply system, as the lifeline of urban operations, has undergone many technological innovations and upgrades, its level of intelligence, integration and stability is still not high, becoming an important bottleneck restricting the efficient and sustainable development of cities.

[0003] Most of the existing power supply systems are still based on the traditional centralized control and manual intervention mode, lacking sufficient intelligence and automation. This is mainly reflected in the following aspects:

[0004] First, the data collection and analysis capabilities of the power supply system are limited. Although some power grid nodes have been equipped with sensors and monitoring equipment, these data often cannot fully reflect the status of the power supply system. For example, Chinese patent document CN202310405862.1 discloses a power system data collection method and system. This method and system only uses electric meters as a method for collecting power grid data. It lacks efficient data processing algorithms and intelligent analysis platforms, and cannot reflect the operating status and potential risks of the power grid in real time and accurately. For another example, Chinese patent document CN201120335224.X discloses a comprehensive information collection system for power systems. The generation and storage of PQDIF file data used in this system requires higher computing and storage resources, which is not suitable for resource-limited environments. This causes the power supply system to be unable to respond quickly when faced with sudden failures or anomalies, affecting the stability and reliability of power supply.

[0005] Secondly, the dispatching and control strategies of the power supply system are relatively extensive. Most existing dispatching systems rely on manual experience and fixed rules, lacking flexibility and adaptability. When dealing with large-scale load changes, it is difficult to achieve precise control and optimized dispatching, resulting in energy waste and inefficient grid operation. For example, a Chinese patent document discloses a multi-regional coordinated control method based on load virtual energy storage. In this document, if the supply and demand relationship between regions changes, the control strategy may need to be readjusted, which may increase the complexity and response time of the system.

[0006] Furthermore, the power supply system lacks coordination with other urban infrastructure. In the context of the development of smart cities, the power supply system should be deeply integrated and coordinated with other urban infrastructure such as transportation, sensing, and communications. However, the current level of intelligence in the power supply system limits its ability to share data and link with other systems, making it difficult to form an integrated urban infrastructure network, which affects the overall management efficiency and emergency response speed of the city.

[0007] In summary, the current problems of low intelligence, integration and stability of power supply systems in cities need to be solved urgently. By introducing advanced information technology, artificial intelligence algorithms and Internet of Things technology, promoting the intelligent upgrading and transformation of power supply systems will be an important way to improve urban power supply efficiency and ensure safe and stable operation of cities. Summary of the invention

[0008] In order to solve the problems existing in the prior art of limited data collection and analysis capabilities of urban power supply systems, relatively extensive scheduling and control strategies, and insufficient coordination with other urban infrastructure, the present invention provides a power supply method for urban sensing devices based on priority distribution of energy storage power sources on the street lamp side.

[0009] To achieve the above object, the present invention adopts the following technical solutions:

[0010] A method for powering a city sensing device based on a street lamp side energy storage power source priority distribution, the method comprising the following steps:

[0011] S1. For the roadside power system in the area covered by the street lamp side energy storage power supply, establish a classified electrical appliance power supply label and electrical appliance energy consumption model;

[0012] S2. Obtain the current power supply status of the area covered by the energy storage power supply on the street lamp side;

[0013] S3. According to the current power supply status of the area covered by the energy storage power supply on the street lamp side, a power supply plan is determined using the classified electrical appliance power supply label and the electrical appliance energy consumption model:

[0014] S31. If the area covered by the energy storage power supply on the street lamp side is in a normal power supply state, the power supply system optimizes the power supply cost in real time and monitors the status of electrical appliances in real time;

[0015] S32. If a power supply failure occurs in the area covered by the energy storage power supply on the street lamp side, the energy storage stack and the electrical appliances form a regional microgrid, and the power of the energy storage stack is distributed to the electrical appliances in a tiered manner according to the power supply priority of the electrical appliances;

[0016] S33. The energy storage stack adjusts the output power of the energy storage stack through the state of charge management strategy and the droop control strategy to maintain the frequency stability of the microgrid system.

[0017] Furthermore, in step S1, the roadside power system in the area covered by the street lamp side energy storage power supply is divided into power supply and electrical appliances, wherein the power supply is divided into mains power and energy storage battery stack; the electrical appliances are divided into control equipment, communication equipment, city sensing equipment, city lighting equipment, city management equipment, and convenience service equipment; the mains power distributes power to the electrical appliances through transformers and secondary distribution cabinets, and charges the energy storage battery stack in a power-deficient state, and the energy storage battery stack distributes power to the electrical appliances through the secondary distribution cabinet.

[0018] Furthermore, in step S1, the establishment of classified electrical appliance power supply labels and electrical appliance energy consumption models for the roadside power system in the area covered by the street lamp side energy storage power supply includes:

[0019] S11. Determine the power supply label of the classified electrical appliances according to the roadside power system in the area covered by the street lamp side energy storage power supply;

[0020] S12, based on the classified electrical appliance power supply tags, establishing electrical appliance energy consumption models corresponding to the classified electrical appliance power supply tags;

[0021] In the step S12, based on the classified electrical appliance power supply tags, establishing electrical appliance energy consumption models corresponding to the classified electrical appliance power supply tags includes:

[0022] S121. Use the following formula to establish a charging and discharging model of the energy storage stack for the charging and discharging process of the energy storage stack:

[0023]

[0024] in, is the energy storage stack capacity at time t, is the energy storage stack capacity at the previous measurement time before time t, is the energy storage stack capacity at time 0, is the rated capacity of the energy storage stack, is the charging power at time t, η char For the charging efficiency of the energy storage stack, is the discharge power at time t, η disc is the discharge efficiency of the energy storage stack, Δt is the interval between two adjacent measurement moments, is the maximum charging power, is the maximum discharge power, The shortest charging time to charge to 90% of the rated capacity of the energy storage stack is The shortest discharge time to discharge to 10% of the rated capacity of the energy storage stack. is the reactive power of the charging process at time t, is the reactive power of the discharge process at time t, and θ is the power factor of the energy storage stack; the energy storage stack charge and discharge model is used to measure the real-time capacity of the energy storage stack, calculate the real-time active power and reactive power output of the energy storage stack to match the power consumption of the electrical appliances, and limit the maximum charge and discharge power to ensure the stable operation of the energy storage stack;

[0025] S122. Use the following formula to establish an energy consumption model for the control device:

[0026] E cont =P comp×T comp +P stan_cont ×T stan_cont

[0027] P comp =P dyna +P leak_cont

[0028] P stan_cont ≈P leak_cont

[0029]

[0030] P leak_cont =V rated_cont ×I leak_cont

[0031] Among them, E cont To control the energy consumption of the equipment, P comp To control the power of the device during calculation, T comp To control the duration of the device state calculation, P stan_cont To control the power consumption of the device when it is in standby mode, T stan_cont To control the duration of the device standby state, P dyna To control the dynamic power of the device, P leak_cont is the static power of the control device, α is the switching activity factor, C is the load capacitance, V rated_cont is the rated voltage of the control device, f is the clock frequency, I leak_cont The energy consumption model of the control device is used to calculate the energy consumption of the control device in real time, as well as the power in the calculation state and the standby state, and to provide a reference value for the capacity allocated to the control device when the energy storage stack is powered by cascade;

[0032] S123. Use the following formula to establish an energy consumption model for communication equipment:

[0033] E comm =E TX +E RX +E stan_comm

[0034]

[0035] E RX =lE dyna_comm

[0036] E dyna_comm =P TX ×L÷R

[0037] E stan_comm =V rated_comm ×I leak_comm ×Tstan_comm

[0038] Among them, E comm is the energy consumption of the communication equipment, E TX The energy consumption of the communication device to send data, E RX is the energy consumption of the communication device receiving data, E stan_comm is the energy consumption of the communication device in standby mode, l is the number of bits of data, E dyna_comm is the dynamic energy consumption of the communication equipment, is the energy consumption coefficient of the power amplifier of the communication equipment, d is the communication distance, P TX is the power of the communication device when sending data, L is the data length, R is the data rate, V rated_comm is the rated voltage of the communication equipment, I leak_comm is the leakage current of the communication equipment, T stan_comm The duration of the standby state of the communication device; the energy consumption model of the communication device is used to calculate the energy consumption of the communication device in real time, as well as the power in the dynamic and standby states, and to provide a reference value for the capacity allocated to the communication device when the energy storage stack is powered;

[0039] S124. Use the following formula to establish an energy consumption model of the sensing device:

[0040] E sens =E dyna_sens +E stan_sens

[0041] E dyna_sens =V rated_sens ×I work_sens ×T work_sens ×N sens

[0042] E stan_sens =V rated_sens ×I leak_sens ×T stan_sens

[0043]

[0044] Among them, E sens To sense the energy consumption of the device, E dyna_sens is the energy consumption of the sensing device’s sensing state, E stan_sens To sense the energy consumption of the device in standby state, V rated_sens is the rated voltage of the sensing device, I leak_sens To sense the leakage current of the device in standby state, T stan_sens To sense the duration of the device standby state, I work_sens is the current when the sensing device senses the state, T work_sens N is the duration of a sensing device's sensing.sens The total number of sensing times of the sensing device in one working cycle; the energy consumption model of the sensing device is used to calculate the energy consumption of the sensing device in real time, as well as the power in the sensing state and the standby state, and to provide a reference value for the capacity allocated to the sensing device when the energy storage stack is powered;

[0045] S125. Use the following formula to establish an energy consumption model for urban lighting equipment:

[0046] E light =E on_light +E stan_light

[0047] E on_light =P on_light ×T on_light

[0048] P on_light =V rated_light ×I on_light

[0049] E stan_light =P stan_light ×T stan_light

[0050] P stan_light =V rated_light ×I leak_light

[0051] Among them, E light is the energy consumption of urban lighting equipment, E on_light is the energy consumption of urban lighting equipment in lighting state, E stan_light is the energy consumption of the controller when the urban lighting equipment is in standby mode, P on_light Power of urban lighting equipment, T on_light is the lighting time of urban lighting equipment, V rated_light is the rated voltage of urban lighting equipment, I on_light is the current of the urban lighting equipment in the lighting state, P stan_light is the power of the controller when the urban lighting equipment is in standby mode, T stan_light is the duration of the urban lighting equipment in standby mode, I leak_light The controller leakage current of the urban lighting equipment in the standby state; the energy consumption model of the urban lighting equipment is used to calculate the energy consumption of the urban lighting equipment in real time, as well as the power in the lighting state and the standby state, and is used to provide a reference value for the capacity allocated to the urban lighting equipment when the energy storage stack is powered by cascade;

[0052] S126. Use the following formula to establish an energy consumption model for urban management equipment:

[0053] E mana =Eon_mana +E stan_mana

[0054] E on_mana =P on_mana ×T on_mana

[0055] P on_mana =V rated_mana ×I on_mana

[0056] E stan_mana =P stan_mana ×T stan_mana

[0057] P stan_mana =V rated_mana ×I leak_mana

[0058] Among them, E mana Energy consumption of urban management equipment, E on_mana Energy consumption when managing the state of urban lighting equipment, E stan_mana is the energy consumption of the controller when the urban management equipment is in standby state, P on_mana The power of the urban management equipment when it is working, T on_mana To manage the working hours of equipment for the city, V rated_mana is the rated voltage of the urban management equipment, I on_mana is the current of the urban management equipment in working state, P stan_mana is the power of the controller when the urban management equipment is in standby mode, T stan_mana The duration of the standby state of the city management equipment, I leak_mana The controller leakage current of the city management device in standby state; the energy consumption model of the city management device is used to calculate the energy consumption of the city management device in real time, as well as the power in the working state and the standby state, and is used to provide a reference value for the capacity allocated to the city management device when the energy storage stack is powered by cascade;

[0059] S127. Use the following formula to establish the energy consumption model of convenience service equipment:

[0060] E serv =E on_serv +E stan_serv

[0061] E on_serv =P on_serv ×T o n _serv

[0062] P on_serv =V rated_serv ×I on_serv

[0063] E stan_serv =P stan_serv ×T stan_serv

[0064] P stan_serv =V rated_serv ×I leak_serv

[0065] Among them, E serv Energy consumption of public service equipment, E on_serv Energy consumption when managing the state of the convenience service equipment, E stan_serv The energy consumption of the controller when the convenience service equipment is in standby state, P on_serv The power of the convenience service equipment when it is working, T on_serv Working hours of the convenience service equipment, V rated_serv Rated voltage of the convenience service equipment, I on_serv The current of the convenience service equipment when it is in working state, P stan_serv The power of the controller when the convenience service equipment is in standby state, T stan_serv The duration of the standby state of the service equipment is leak_serv It is the controller leakage current of the convenience service equipment in standby state; the energy consumption model of the convenience service equipment is used to calculate the energy consumption of the convenience service equipment in real time, as well as the power in the working state and the standby state, and is used to provide a reference value for the capacity allocated to the convenience service equipment when the energy storage stack is powered on in stages.

[0066] Furthermore, in step S31, if the area covered by the energy storage power supply on the street lamp side is in a normal power supply state, the power supply system optimizes the power supply cost in real time and monitors the state of the electrical appliances in real time, including:

[0067] S311, Power supply cost optimization

[0068] Divide the power supply time into off-peak and peak periods, determine the current period, and optimize the power supply cost based on the period and the real-time capacity of the energy storage stack;

[0069] The power supply cost optimization is performed according to the time period and the real-time capacity of the energy storage stack, including:

[0070] If it is a valley power period, the mains will charge the energy storage stack, and the mains will supply power to control equipment, communication equipment, city sensing equipment, city lighting equipment, city management equipment, and convenience service equipment; if it is a peak power period, the mains will stop charging the energy storage stack, and the energy storage stack will supply power to the power-consuming equipment, and the energy storage stack will be used to obtain the real-time capacity of the energy storage stack using the energy storage stack charging and discharging model, and adjust the power supply plan according to the real-time capacity of the energy storage stack; if the capacity of the energy storage stack is greater than 80% of the maximum capacity, the energy storage stack will supply power to control equipment, communication equipment, city sensing equipment, city lighting equipment, city management equipment, and convenience service equipment; if the capacity of the energy storage stack is less than 80% of the maximum capacity and is greater than 80% of the maximum capacity, the energy storage stack will be used to supply power to the control equipment, communication equipment, city sensing equipment, city lighting equipment, city management equipment, and convenience service equipment; If the capacity of the energy storage stack is less than 50% of the maximum capacity and greater than 20% of the maximum capacity, the energy storage stack will supply power to the control equipment, communication equipment, city sensing equipment, city lighting equipment, and city management equipment, and the convenience service equipment will be powered by the mains; if the capacity of the energy storage stack is less than 20% of the maximum capacity, the energy storage stack will stop supplying power to the power-consuming equipment, and the mains will supply power to the control equipment, communication equipment, city sensing equipment, city lighting equipment, city management equipment, and convenience service equipment;

[0071] The power supply cost optimization is performed according to the time period and the real-time capacity of the energy storage stack, and the following model is used for implementation:

[0072] When t∈T vall hour,

[0073]

[0074]

[0075] Among them, T vall The off-peak electricity price period is is the mains output power, P char is the charging power of the energy storage stack, P cont To control the average power of the equipment, P comm is the average power of the communication equipment, P sens is the average power of the city sensing device, P light is the power of urban lighting equipment, P mana Average power of urban management equipment, P serv For the convenience of the people, the power of the equipment is E cont To control the energy consumption of the equipment, T cycle For a working cycle, E comm is the energy consumption of the communication equipment, E sens To sense the energy consumption of the device, P stan_light is the power of the controller when the urban lighting equipment is in standby mode, Pon_light Power of urban lighting equipment, T light is the lighting period, T cons_light For lighting power saving period, E mana is the energy consumption of urban management equipment, P on_serv The power of the convenience service equipment when it is working, P stan_serv The power of the controller when the convenience service equipment is in standby state, T srev To provide convenience to the public during peak hours of equipment usage;

[0076] When t∈T peak hour,

[0077]

[0078] in, is the mains output power, P cont To control the average power of the equipment, P comm is the average power of the communication equipment, P sens is the average power of the city sensing device, P light is the power of urban lighting equipment, P mana Average power of urban management equipment, P serv For the convenience of the people, the power of the equipment is T peak is the peak electricity price period, P disc is the discharge power of the energy storage stack, is the energy storage stack capacity at time t, The maximum capacity of the energy storage stack;

[0079] S312, Real-time monitoring of electrical appliance status

[0080] Obtain the minimum rated current, maximum rated current and minimum rated current of the electrical appliance, and monitor the state of the electrical appliance in real time according to the relationship among the minimum rated current, maximum rated current and minimum rated current of the electrical appliance to determine whether the state of the electrical appliance is abnormal;

[0081] The real-time monitoring of the state of the electrical appliances to determine whether the state of the electrical appliances is abnormal includes:

[0082] If the actual current of the electrical appliance is less than 50% of the minimum rated current or greater than 50% of the maximum rated current, the electrical appliance state at this time is determined to be abnormal; if the electrical appliance state is abnormal, the electrical energy of the abnormal energy consumption of the electrical appliance is measured, and the number of abnormal energy consumption occurrences is counted; if the electrical energy of the abnormal energy consumption of the electrical appliance exceeds the set maximum abnormal energy consumption, or the number of abnormal states of the electrical appliance is greater than the set maximum cumulative number of abnormal states, the power supply to the device is stopped; the electrical energy of the abnormal energy consumption of the electrical appliance is obtained by calculating the absolute value of the difference between the actual power of the electrical appliance and the power in the normal state within a working cycle;

[0083] The real-time monitoring of the electrical appliance status is achieved using the following model:

[0084]

[0085] Among them, E abno is the abnormal energy consumption of electrical appliances, P norm is the normal power of the electrical appliance, I abno is the actual current of the electrical appliance, I rated_min is the minimum rated current of the electrical appliance, I rated_max is the maximum rated current of the electrical appliance, N abno is the number of abnormal states of electrical appliances, P actual is the actual power of the electrical appliance;

[0086] For control equipment, use the following formula to find its minimum and maximum rated currents:

[0087] I rated_min_cont =I leak_cont

[0088]

[0089] Among them, I rated_min_cont is the minimum rated current of the control device, I leak_cont To control the leakage current of the device, I rated_max_cont is the maximum rated current of the control device, P comp To control the power of the device, V rated_cont To control the rated voltage of the equipment;

[0090] For communication equipment, use the following formula to calculate its minimum and maximum rated currents:

[0091] I rated_min_comm =I leak_comm

[0092]

[0093] Among them, I rated_min_comm is the minimum rated current of the communication equipment, I leak_comm is the leakage current of the communication equipment, I rated_max_comm is the maximum rated current of the communication equipment, P TX The power of the communication device when sending data, V rated_comm is the rated voltage of the communication equipment;

[0094] For city sensing devices, use the following formula to calculate the minimum and maximum rated currents:

[0095] I rated_min_sens =Ileak_senst

[0096] I rated_max_sens =I work_sens

[0097] Among them, I rated_min_sens is the minimum rated current of the city sensing device, I leak_senst is the leakage current of the city sensing device, I rated_max_sens is the maximum rated current of the city sensing device, I work_sens The current when the city sensing device senses the state;

[0098] For urban lighting equipment, the minimum and maximum rated currents are obtained using the following formula:

[0099] I rated_min_light =I leak_light

[0100] I rated_max_light =I on_light

[0101] Among them, I rated_min_light is the minimum rated current of urban lighting equipment, I leak_light is the leakage current of urban lighting equipment, I rated_max_light is the maximum rated current of urban lighting equipment, I work_sens The current when the city lighting equipment is in the lighting state;

[0102] For urban management equipment, the minimum and maximum rated currents are obtained using the following formula:

[0103] I rated_min_mana =I leak_mana

[0104] I rated_max_mana =I on_mana

[0105] Among them, I rated_min_mana is the minimum rated current of urban management equipment, I leak_mana is the leakage current of the urban management equipment, I rated_max_mana is the maximum rated current of the urban management equipment, I on_mana The current when the urban management equipment is in working state;

[0106] For convenience service equipment, use the following formula to calculate its minimum rated current and maximum rated current:

[0107] I rated_min_serv =I leak_serv

[0108] I rated_max_serv =I on_serv

[0109] Among them, I rated_min_serv The minimum rated current of the convenience service equipment, I leak_serv Leakage current of the convenience service equipment, I rated_max_serv The maximum rated current of the convenience service equipment, I on_serv The current when the convenience service equipment is in working state;

[0110] Furthermore, in step S32, if a power supply failure occurs in the area covered by the energy storage power supply on the street lamp side, the energy storage stack and the electrical appliances form a regional microgrid, and the electric energy of the energy storage stack is distributed to the electrical appliances in a tiered manner according to the power supply priority of the electrical appliances, including:

[0111] S321. Building regional microgrids

[0112] When a power failure occurs, the electrical appliances in the area where the mains power supply fails are switched to the energy storage stack for power supply. The control equipment detects the circuit status, isolates the damaged line, and the remaining intact lines form the regional microgrid.

[0113] S322. Determine the critical coefficient of electrical appliances

[0114] The energy storage stack calculates the real-time capacity based on the energy storage stack charging and discharging model, and determines the critical coefficient α of different types of electrical appliances based on the power supply labels of classified electrical appliances. i ; Among them, the critical coefficient of the control device is α cont , the critical coefficient of the communication equipment is α comm , the critical coefficient of urban sensing equipment is α sens , the critical coefficient of urban lighting equipment is α light , the critical coefficient of urban management equipment is α mana , the importance coefficient of the convenience service equipment is α serv , α cont =α comm >>α sens >>α mana >>α light >>α serv ;

[0115] S323. Calculate the energy consumption ratio of each electrical appliance

[0116] Calculate the energy consumption ratio of each electrical appliance based on the energy consumption model of control equipment, communication equipment, city sensing equipment, city lighting equipment, city management equipment, and public service equipment;

[0117] The calculation of the energy consumption ratio of each electrical appliance includes:

[0118] S3231, using the energy consumption model of each electrical appliance to obtain the energy consumption of each electrical appliance; cont To control the energy consumption of the equipment, E comm is the energy consumption of the communication equipment, E sens is the energy consumption of the city sensing device, E light is the energy consumption of urban lighting equipment, E mana Energy consumption of urban management equipment, E serv Energy consumption of equipment for public convenience services;

[0119] S3232. For any electrical appliance, use the following formula to calculate its energy consumption ratio:

[0120]

[0121] Among them, E i is the energy consumption of the appliance, is the total energy consumption of all electrical appliances in the set. For the roadside power system, the total energy consumption of all electrical appliances is

[0122] The energy consumption ratio of the control equipment is obtained as follows: The energy consumption ratio of communication equipment is The energy consumption ratio of the control equipment is The energy consumption ratio of the control equipment is The energy consumption ratio of the control equipment is The energy consumption ratio of the control equipment is

[0123] S324: Provide tiered distribution of power supply to electrical appliances

[0124] According to the critical coefficients of different types of electrical appliances and the energy consumption ratio of the energy consumption model, the priority weights of electrical appliances are established, and the power supply plan is adjusted according to the priority weights of electrical appliances and the real-time capacity of the energy storage stack, and the power supply of electrical appliances is distributed in a tiered manner;

[0125] S3241, using formula W i =k i ×α i Determine the priority weights of electrical appliances and obtain the priority weights of each electrical appliance;

[0126] The priority weight of the control device is W cont =k cont ×α cont , the priority weight W of the communication device comm =k comm ×α comm , the priority weight W of the city sensing device sens =k sens ×α sens, the priority weight of urban lighting equipment is W light =k light ×α light , the priority weight of the city management equipment is W mana =k mana ×α mana , the priority weight of the convenience service equipment is W serv =k serv ×α serv , the priority weight relationship of each electrical appliance is: W cont =W comm >W sens >W mana >W light >W serv ;

[0127] S3242, the power supply system determines the tiered power supply sequence according to the priority weights of the electrical appliances, allocates available capacity to the electrical appliances, and allocates power supply to the electrical appliances according to the real-time capacity;

[0128] For control equipment, the entire capacity of the energy storage stack is used for power supply, that is, when hour, otherwise For communication equipment, the entire capacity of the energy storage stack is used for power supply, that is, when hour, otherwise For city sensing devices, the first 95% of the energy storage stack capacity is used for power supply, that is, when hour, otherwise For urban management equipment, the first 80% of the energy storage stack capacity is used for power supply, that is, when hour, otherwise For urban lighting equipment, the first 50% of the energy storage stack capacity is used for power supply, that is, when hour, otherwise For convenience service equipment, the first 20% of the energy storage stack capacity is used for power supply, that is, when hour, otherwise

[0129] The distribution of power supply to electrical appliances according to real-time capacity is achieved by using the following formula:

[0130] P main =0

[0131]

[0132] Among them, P main is the mains output power, Pdisc is the discharge power of the energy storage stack, The power supply allocated to the control device, P cont To control the average power of the device, The power supply allocated to the communication equipment, P comm is the average power of the communication equipment, Power allocated to city sensing devices, P sens is the average power of the city sensing device, Power supply allocated to urban management equipment, P mana Average power of urban management equipment, Power supply allocated to urban lighting equipment, P light is the power of urban lighting equipment, Power supply allocated to convenience service equipment, P serv To provide convenient service equipment power, is the energy storage stack capacity at time t, It is the maximum capacity of the energy storage stack.

[0133] S3243. Obtain the real-time capacity of the energy storage stack and adjust the power supply plan according to the real-time capacity of the energy storage stack:

[0134] If the capacity of the energy storage stack is greater than 80% of the maximum capacity, the energy storage stack will power control equipment, communication equipment, urban sensing equipment, urban lighting equipment, urban management equipment, and convenience service equipment;

[0135] If the energy storage stack capacity is less than 80% of the maximum capacity and greater than 50% of the maximum capacity, the energy storage stack will supply power to the control equipment, communication equipment, city sensing equipment, city lighting equipment, and city management equipment, and the convenience service equipment will stop providing services to the outside world.

[0136] If the capacity of the energy storage stack is less than 50% of the maximum capacity and greater than 20% of the maximum capacity, the energy storage stack will supply power to the control equipment, communication equipment, city sensing equipment, and city management equipment. At this time, the city lighting equipment and convenience service equipment will stop working.

[0137] If the energy storage stack capacity is less than 20% of the maximum capacity and greater than 5% of the maximum capacity, the energy storage stack will power the control equipment, communication equipment, and city sensing equipment. At this time, the city management equipment, city lighting equipment, and convenience service equipment will stop working.

[0138] If the capacity of the energy storage stack is less than 5% of the maximum capacity, the energy storage stack will power the control equipment and communication equipment. At this time, the city sensing equipment, city management equipment, city lighting equipment, and convenience service equipment will stop working.

[0139] Furthermore, in step S3, the energy storage stack adjusts the output power of the energy storage stack through the state of charge management strategy and the droop control strategy to maintain the frequency stability of the microgrid system, including:

[0140] S331, according to the real-time capacity of the energy storage stack, using the charge state management strategy shown in the following formula, adjusting the output power of the energy storage stack to achieve charge state management of the energy storage stack;

[0141]

[0142] in, is the upper limit of the discharge power of the energy storage stack at time t, is the capacity of the energy storage stack at time t, is the maximum capacity of the energy storage stack, is the maximum discharge power of the energy storage stack, α, β, and γ are the discharge power coefficients of the energy storage stack at different capacities, and α<β<γ;

[0143] S332, obtain the actual voltage, current, and frequency of the microgrid, and use the droop control strategy shown in the following formula to perform active-frequency control and reactive-voltage control to keep the frequency of the microgrid system within the set difference range of the rated frequency:

[0144]

[0145] Where f is the actual frequency of the microgrid system, f0 is the reference frequency, is the actual active power output of the microgrid system, P0 is the reference active power, k p is the active power-frequency droop coefficient, V L is the line voltage, I L is the line current, is the phase angle of current and voltage, V is the actual voltage of the microgrid system, V0 is the reference voltage, is the reactive power actually output by the microgrid system, Q0 is the reference reactive power, k q is the reactive power-voltage droop coefficient.

[0146] Compared with the prior art, the advantages of the present invention are:

[0147] The present invention establishes a power supply label for classified electrical appliances and an energy consumption model for electrical appliances, realizing intelligent management and monitoring of electrical appliances. The state of electrical appliances is monitored in real time, including the abnormal energy consumption and the number of abnormal states, so as to timely discover and deal with potential problems. In both normal power supply and power supply failure states, tiered distribution is carried out according to the power supply priority of electrical appliances, ensuring the priority power supply of key equipment. In the normal power supply state, by distinguishing between valley electricity price periods and peak electricity price periods, and utilizing the complementary power supply of city electricity and energy storage stacks, the power supply cost is effectively reduced. When a power supply failure occurs, the energy storage power supply can quickly form a regional microgrid with electrical appliances to ensure the power supply of key equipment and improve the reliability of power supply. Through the state of charge management strategy and the droop control strategy, the use time of the energy stored in the energy storage stack is maximized. The present invention has significant technical advantages, and can improve the reliability, stability and intelligence level of urban power supply, while reducing the power supply cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0148] Figure 1 A method flow chart of the method for preferentially distributing power to a city sensing device based on the energy storage power supply on the street lamp side in the present invention;

[0149] Figure 2 A schematic diagram of establishing an electrical appliance label provided by the present invention;

[0150] Figure 3 A schematic diagram of the electricity cost optimization process provided by the present invention;

[0151] Figure 4 A schematic diagram of the electrical appliance status monitoring process provided by the present invention;

[0152] Figure 5 This is a schematic diagram of the step-by-step distribution process of electrical appliance power supply provided by the present invention. DETAILED DESCRIPTION

[0153] The present disclosure is further described below with reference to the accompanying drawings and embodiments:

[0154] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present disclosure. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present disclosure belongs.

[0155] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present disclosure. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0156] In the absence of conflict, the embodiments in the present disclosure and the features in the embodiments may be combined with each other.

[0157] The present invention provides a method for powering a city sensing device based on the priority distribution of energy storage power supply on the street lamp side, such as Figure 1 As shown, the method comprises the following steps:

[0158] S1. Establish classified electrical appliance power supply labels and electrical appliance energy consumption models for the roadside power system in the area covered by the street lamp side energy storage power supply.

[0159] The roadside power system in the area covered by the street lamp side energy storage power supply is divided into power supply and electrical appliances, among which the power supply is divided into mains power and energy storage battery stack; the electrical appliances are divided into control equipment, communication equipment, city sensing equipment, city lighting equipment, city management equipment, and convenience service equipment; the mains power distributes electricity to electrical appliances through transformers and secondary distribution cabinets, and charges the energy storage battery stack in the power-deficient state. The energy storage battery stack can distribute electricity to electrical appliances through the secondary distribution cabinet.

[0160] S2. Obtain the current power supply status of the area covered by the energy storage power supply on the street lamp side.

[0161] S3. Determine the power supply mode according to the current power supply status of the area covered by the energy storage power supply on the street lamp side: If the area covered by the energy storage power supply on the street lamp side is in a normal power supply state, the power supply system will optimize the power supply cost in real time and monitor the status of electrical appliances in real time; If a power supply failure occurs in the area covered by the energy storage power supply on the street lamp side, the energy storage power supply and the electrical appliances will form a regional microgrid, and the energy of the energy storage power supply will be distributed to the electrical appliances in a tiered manner according to the power supply priority of the electrical appliances.

[0162] like Figure 3As shown in the figure, the power supply time is divided into valley electricity price period and peak electricity price period. During the valley electricity period, the mains electricity charges the energy storage stack, and the mains electricity supplies power to the control equipment, communication equipment, urban sensing equipment, urban lighting equipment, urban management equipment, and convenient service equipment. During the peak electricity period, the mains electricity stops charging the energy storage stack, and the energy storage stack supplies power to the electrical equipment, and adjusts the power supply plan according to the real-time capacity of the energy storage stack. Specifically: when the capacity of the energy storage stack is greater than 80% of the maximum capacity, the energy storage stack supplies power to the control equipment, communication equipment, city perception equipment, city lighting equipment, city management equipment, and convenience service equipment; when the capacity of the energy storage stack is less than 80% of the maximum capacity and greater than 50% of the maximum capacity, the energy storage stack supplies power to the control equipment, communication equipment, city perception equipment, city lighting equipment, and city management equipment, and the convenience service equipment is powered by the mains; when the capacity of the energy storage stack is less than 50% of the maximum capacity and greater than 20% of the maximum capacity, the energy storage stack supplies power to the control equipment, communication equipment, city perception equipment, and city management equipment, and the city lighting equipment and convenience service equipment are powered by the mains; when the capacity of the energy storage stack is less than 20% of the maximum capacity, the energy storage stack stops supplying power to the electrical equipment, and the mains supplies power to the control equipment, communication equipment, city perception equipment, city lighting equipment, city management equipment, and convenience service equipment.

[0163] like Figure 4 As shown, the state monitoring of electrical appliances is mainly carried out by measuring the amount of abnormal energy consumption of electrical appliances and counting the number of abnormal energy consumption. The abnormal energy consumption of electrical appliances is obtained by calculating the absolute value of the difference between the actual power of the electrical appliance and the power in the normal state during a working cycle. When the actual current of the electrical appliance is less than 50% of the minimum rated current or greater than 50% of the maximum rated current, the state of the electrical appliance at this time is considered to be an abnormal state, and the measurement of the abnormal energy consumption of the electrical appliance begins, and the number of abnormal states of the electrical appliance is accumulated once; when the abnormal energy consumption of the electrical appliance exceeds the set maximum abnormal energy consumption, or the number of abnormal states of the electrical appliance is greater than the set maximum cumulative number of abnormal states, the power supply to the device is stopped.

[0164] like Figure 5As shown in the figure, when a power failure occurs in the area covered by the energy storage power supply on the street lamp side, the energy storage power supply and the electrical appliances form a regional microgrid, and the energy of the energy storage power supply is distributed to the electrical appliances in a tiered manner according to the power supply priority of the electrical appliances. When a power failure occurs, the electrical appliances in the area where the mains power supply fails are switched to the energy storage stack for power supply, the control equipment detects the circuit status, isolates the damaged line, and the remaining intact lines form a regional microgrid, and the energy storage stack adjusts the power supply plan according to the real-time capacity. Specifically: when the capacity of the energy storage stack is greater than 80% of the maximum capacity, the energy storage stack supplies power to the control equipment, communication equipment, city sensing equipment, city lighting equipment, city management equipment, and convenient service equipment; when the capacity of the energy storage stack is less than 80% of the maximum capacity and greater than 50% of the maximum capacity, the energy storage stack supplies power to the control equipment, communication equipment, city sensing equipment, city lighting equipment, and city management equipment, and at this time the convenient service equipment stops providing services to the outside world; when the capacity of the energy storage stack is less than 50% of the maximum capacity and greater than 20% of the maximum capacity, the energy storage stack supplies power to the control equipment, communication equipment, city sensing equipment, and city management equipment, and at this time the city lighting equipment and convenient service equipment stop working; when the capacity of the energy storage stack is less than 20% of the maximum capacity and greater than 5% of the maximum capacity, the energy storage stack supplies power to the control equipment, communication equipment, city sensing equipment, and city management equipment, and at this time the city lighting equipment and convenient service equipment stop working; The control equipment, communication equipment and city sensing equipment are powered, and the city management equipment, city lighting equipment and convenience service equipment stop working; when the capacity of the energy storage stack is less than 5% of the maximum capacity, the energy storage stack supplies power to the control equipment and communication equipment, and the city sensing equipment, city management equipment, city lighting equipment and convenience service equipment stop working; at the same time, in order to ensure the maximum extension of the use time of the stored energy in the energy storage stack, the management and control strategy of the energy storage stack includes the state of charge management strategy and the droop control strategy. The state of charge management strategy mainly adjusts the maximum discharge power of the energy storage stack according to the real-time capacity of the energy storage stack. The droop control strategy of the energy storage stack mainly detects the actual voltage, current and frequency of the microgrid, and keeps the frequency of the microgrid system near the rated frequency through active-frequency control and reactive-voltage control.

[0165] Preferably, in step S1, the step of establishing a classified electrical appliance power supply label and an electrical appliance energy consumption model for the roadside power system in the area covered by the street lamp side energy storage power supply includes:

[0166] Model the charging and discharging of the energy storage stack:

[0167]

[0168]

[0169] in, is the energy storage stack capacity at time t, is the rated capacity of the energy storage stack, is the charging power at time t, ηchar For the charging efficiency of the energy storage stack, is the discharge power at time t, η disc is the discharge efficiency of the energy storage stack, is the maximum charging power, is the maximum discharge power, The shortest charging time to charge to 90% of the rated capacity of the energy storage stack is The shortest discharge time to discharge to 10% of the rated capacity of the energy storage stack. is the reactive power of the charging process at time t, is the reactive power of the discharge process at time t, and θ is the power factor of the energy storage stack.

[0170] Model the energy consumption of control equipment:

[0171] E cont =P comp ×T comp +P stan_cont ×T stan_cont P comp =P dyna +P leak

[0172] P stan_cont ≈P leak_cont

[0173]

[0174] P leak_cont =V rated_cont ×I leak_cont

[0175] Among them, E cont To control the energy consumption of the equipment, P comp To control the power of the device during calculation, T comp To control the duration of the device state calculation, P stan_cont To control the power consumption of the device when it is in standby mode, T stan_cont To control the duration of the device standby state, P dyna To control the dynamic power of the device, P leak_cont is the static power of the control device, α is the switching activity factor, C is the load capacitance, V rated_cont is the rated voltage of the control device, f is the clock frequency, I leak_cont To control the leakage current of the equipment.

[0176] Model the energy consumption of communications equipment:

[0177] E comm =E TX +E RX +Estan_comm

[0178]

[0179] E RX =lE dyna_comm

[0180] E dyna_comm =P TX ×L÷R

[0181] E stan_comm =V rated_comm ×I leak_comm ×T stan_comm

[0182] Among them, E comm is the energy consumption of the communication equipment, E TX The energy consumption of the communication device to send data, E RX is the energy consumption of the communication device receiving data, E stan_comm is the energy consumption of the communication device in standby mode, l is the number of bits of data, E dyna_comm is the dynamic energy consumption of the communication equipment, is the energy consumption coefficient of the power amplifier of the communication equipment, d is the communication distance, P TX is the power of the communication device when sending data, L is the data length, R is the data rate, V rated_comm is the rated voltage of the communication equipment, I leak_comm is the leakage current of the communication equipment, T stan_comm The duration of the communication device in standby mode.

[0183] Model the energy consumption of sensing devices:

[0184] E sens =E dyna_sens +E stan_sens

[0185] E dyna_sens =V rated_sens ×I work_sens ×T work_sens ×N

[0186] E stan_sens =V rated_sens ×I leak_sens ×T stan_sens

[0187]

[0188] Among them, E sens To sense the energy consumption of the device, E dyna_sens is the energy consumption of the sensing device’s sensing state, E stan_sens To sense the energy consumption of the device in standby state, Vrated_sens is the rated voltage of the sensing device, I work_sens is the current when the sensing device senses the state, T work_sens N is the duration of a sensing device's sensing. sens It is the total number of sensing times of the sensing device in one working cycle.

[0189] Model the energy consumption of urban lighting equipment:

[0190] E light =E on_light +E stan_light

[0191] E on_light =P on_light ×T on_light

[0192] P light =V rated_light ×I on_light

[0193] E stan_light =P stan_light ×T stan_light

[0194] P stan_light =V rated_light ×I leak_light

[0195] Among them, E light is the energy consumption of urban lighting equipment, E on_light is the energy consumption of urban lighting equipment in lighting state, E stan_light is the energy consumption of the controller when the urban lighting equipment is in standby mode, P on_light Power of urban lighting equipment, T on_light is the lighting time of urban lighting equipment, V rated_light is the rated voltage of urban lighting equipment, I on_light is the current of the urban lighting equipment in the lighting state, P stan_light is the power of the controller when the urban lighting equipment is in standby mode, T stan_light is the duration of the urban lighting equipment in standby mode, I leak_light It is the controller leakage current when the urban lighting equipment is in standby state.

[0196] Model the energy consumption of urban management equipment:

[0197] E mana =E on_mana +E stan_mana

[0198] E on_mana =P on_mana ×Ton_mana

[0199] P on _ mana =V rated_mana ×I on_mana

[0200] E stan_mana =P stan_mana ×T stan_mana

[0201] P stan_mana =V rated_mana ×I leak_mana

[0202] Among them, E mana Energy consumption of urban management equipment, E on_mana Energy consumption when managing the state of urban lighting equipment, E stan_mana is the energy consumption of the controller when the urban management equipment is in standby state, P on_mana The power of the urban management equipment when it is working, T on_mana To manage the working hours of equipment for the city, V rated_mana is the rated voltage of the urban management equipment, I on_mana is the current of the urban management equipment in working state, P stan_mana is the power of the controller when the urban management equipment is in standby mode, T stan_mana The duration of the standby state of the city management equipment, I leak_mana This is the controller leakage current when the city management equipment is in standby mode.

[0203] Model the energy consumption of convenience service equipment:

[0204] E serv =E on_serv +E stan_serv

[0205] E on_serv =P on_serv ×T on_serv

[0206] P on_serv =V rated_serv ×I on_serv

[0207] E stan_serv =P stan_serv ×T stan_serv

[0208] P stan_serv =V rated_serv ×I leak_serv

[0209] Among them, E servEnergy consumption of convenience service equipment, E on_serv Energy consumption when managing the state of the convenience service equipment, E stan_serv The energy consumption of the controller when the convenience service equipment is in standby state, P on_serv The power of the convenience service equipment when it is working, T on_serv Working hours of the convenience service equipment, V rated_serv Rated voltage of the convenience service equipment, I on_serv The current of the convenience service equipment when it is in working state, P stan_serv The power of the controller when the convenience service equipment is in standby state, T stan_serv The duration of the standby state of the service equipment is leak_serv It is the controller leakage current when the convenience service equipment is in standby state.

[0210] Preferably, according to the present invention, in step S3, when the area covered by the energy storage power supply on the street lamp side is in a normal power supply state, the power supply system optimizes the power supply cost in real time and monitors the state of electrical appliances in real time, including:

[0211] Modeling the electricity cost optimization process:

[0212] When t∈T vall hour,

[0213]

[0214]

[0215] Among them, T vall The off-peak electricity price period is is the mains output power, P char is the charging power of the energy storage stack, P cont To control the average power of the equipment, P comm is the average power of the communication equipment, P sens is the average power of the city sensing device, P light is the power of urban lighting equipment, P mana Average power of urban management equipment, P serv For the convenience of the people, the power of the equipment is T cycle For one working cycle, T light is the lighting period, T cons_light T is the lighting power saving period. srev This is the peak usage period for convenience services equipment.

[0216] When t∈T peak hour,

[0217]

[0218] Among them, Tpeak is the peak electricity price period, P disc is the discharge power of the energy storage stack, is the energy storage stack capacity at time t, It is the maximum capacity of the energy storage stack.

[0219] Establish a model for the electrical appliance status monitoring process:

[0220]

[0221]

[0222] Among them, E abno is the abnormal energy consumption of electrical appliances, P norm is the normal power of the electrical appliance, I abno is the actual current of the electrical appliance, I rated_min is the minimum rated current of the electrical appliance, I rated_max is the maximum rated current of the electrical appliance, N abno is the number of abnormal states of electrical appliances, P actual The actual power of the electrical appliance.

[0223] For control equipment

[0224] I rated_min_cont =I leak_cont

[0225]

[0226] For communication equipment

[0227] I rated_min_comm =I leak_comm

[0228]

[0229] For city sensing devices

[0230] I rated_m in _sens =I leak_senst

[0231] I rated_max_sens =I work_sens

[0232] For urban lighting equipment

[0233] I rated_min_light =I leak_light

[0234] I rated_max_light =I on_light

[0235] For urban management equipment

[0236] I rated_min_mana =I leak_mana

[0237] I rated_max_mana =I on_mana

[0238] For convenience service equipment

[0239] I rated_min_serv =I leak_serv

[0240] I rated_max_serv =I on_serv

[0241] According to a preferred embodiment of the present invention, in step S3, when a power supply failure occurs in the area covered by the energy storage power supply on the street lamp side, the energy storage power supply and the electrical appliances form a regional microgrid, and the electric energy of the energy storage power supply is distributed to the electrical appliances in a tiered manner according to the power supply priority of the electrical appliances, including:

[0242] Model the elevator tiered distribution process:

[0243] P main =0

[0244]

[0245] The charge state management strategy model of the energy storage stack is:

[0246]

[0247] in, is the upper limit of the discharge power of the energy storage stack at time t, is the capacity of the energy storage stack at time t, is the maximum discharge power of the energy storage stack, α, β, and γ are the discharge power coefficients of the energy storage stack at different capacities, and α<β<γ.

[0248] The droop control strategy model of the energy storage battery pack is:

[0249]

[0250] Where f is the actual frequency of the microgrid system, f0 is the reference frequency, is the actual active power output of the microgrid system, P0 is the reference active power, k p is the active power-frequency droop coefficient, V L is the line voltage, I L is the line current, is the phase angle of current and voltage, V is the actual voltage of the microgrid system, V0 is the reference voltage, is the reactive power actually output by the microgrid system, Q0 is the reference reactive power, k q is the reactive power-voltage droop coefficient.

[0251] The present invention is described below by means of specific examples:

[0252] The power supply method described in the present invention is implemented based on the following hardware structure: energy storage stack, control cabinet, road monitoring perception module, underground pipe gallery monitoring module, intelligent street lamp, roadside parking fee pile, roadside car charging pile. The capacity of the energy storage stack is 20kWh, and the control cabinet contains a control host and a communication repeater. The rated power of the control host is 150W, the rated power of the communication repeater is 10W, the rated power of the road monitoring perception module is 10W, the rated power of the underground pipe gallery monitoring module is 10W, the rated power of the intelligent street lamp is 300W, the rated power of the roadside parking fee pile is 50W, and the rated power of the roadside car charging pile is 50kW. The control host is classified as a control device, the communication repeater is classified as a communication device, the road monitoring perception module and the underground pipe gallery monitoring module are classified as urban perception devices, the intelligent street lamp is classified as an urban lighting device, the roadside parking fee pile is classified as an urban management device, and the roadside car charging pile is classified as a convenience service device.

[0253] When the power distribution system is in normal condition, during the off-peak period, the mains will charge the energy storage stack, and the mains will supply power to the control host, communication repeater, road monitoring and sensing module and underground corridor monitoring module, intelligent street lamp, roadside parking fee pile, and roadside car charging pile. During the peak period, the mains will stop charging the energy storage stack, and the energy storage stack will supply power to the electrical equipment. The power supply plan will be adjusted according to the real-time capacity of the energy storage stack. Specifically, when the capacity of the energy storage stack is greater than 80% of the maximum capacity, the energy storage stack will supply power to the control host, communication repeater, road monitoring and sensing module and underground corridor monitoring module, intelligent street lamp, roadside parking fee pile, and roadside car charging pile. When the capacity of the energy storage stack is less than 80% of the maximum capacity and greater than 50% of the maximum capacity, The energy storage stack supplies power to the control host, communication repeater, road monitoring perception module and underground pipe gallery monitoring module, smart street lamps, and roadside parking fee piles. At this time, the roadside car charging piles are powered by the mains; when the capacity of the energy storage stack is less than 50% of the maximum capacity and greater than 20% of the maximum capacity, the energy storage stack supplies power to the control host, communication repeater, road monitoring perception module and underground pipe gallery monitoring module, and roadside parking fee piles. At this time, the smart street lamps and roadside car charging piles are powered by the mains; when the capacity of the energy storage stack is less than 20% of the maximum capacity, the energy storage stack stops supplying power to the electrical equipment. At this time, the mains supplies power to the control host, communication repeater, road monitoring perception module and underground pipe gallery monitoring module, smart street lamps, roadside parking fee piles, and roadside car charging piles.

[0254] When a power supply failure occurs in the area covered by the energy storage power supply on the street lamp side, the electrical appliances in the mains power supply failure area are switched to the energy storage stack for power supply, the control host detects the circuit status, isolates the damaged line, and the remaining intact lines form a regional microgrid. The energy storage stack adjusts the power supply plan according to the real-time capacity. Specifically: when the capacity of the energy storage stack is greater than 80% of the maximum capacity, the energy storage stack supplies power to the control host, communication repeater, road monitoring perception module and underground corridor monitoring module, smart street lamp, roadside parking fee pile, and roadside car charging pile; when the capacity of the energy storage stack is less than 80% of the maximum capacity and greater than 50% of the maximum capacity, the energy storage stack supplies power to the control host, communication repeater, road monitoring perception module and underground corridor monitoring module, smart street lamp, roadside parking fee pile, and the roadside car charging pile stops providing services to the outside world. ; When the capacity of the energy storage stack is less than 50% of the maximum capacity and greater than 20% of the maximum capacity, the energy storage stack supplies power to the control host, communication repeater, road monitoring perception module and underground pipe gallery monitoring module, and roadside parking fee collection piles. At this time, the smart street lights and roadside car charging piles stop working; when the capacity of the energy storage stack is less than 20% of the maximum capacity and greater than 5% of the maximum capacity, the energy storage stack supplies power to the control host, communication repeater, road monitoring perception module and underground pipe gallery monitoring module. At this time, the roadside parking fee collection piles, smart street lights, and roadside car charging piles stop working; when the capacity of the energy storage stack is less than 5% of the maximum capacity, the energy storage stack supplies power to the control host and communication repeater. At this time, the road monitoring perception module and underground pipe gallery monitoring module, roadside parking fee collection piles, smart street lights, and roadside car charging piles stop working.

[0255] The rated current of the smart street light in this embodiment is 1.36A. When it is detected that the current of the smart street light is less than 0.68A, the control device starts to calculate the abnormal energy consumption and counts the abnormal energy consumption. If the abnormal energy consumption is equal to or greater than 1kWh or the cumulative abnormal energy consumption count is equal to or greater than three times, the control device controls the power switch to stop supplying power to the smart street light.

[0256] The above-described embodiments are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the scope of protection determined by the claims of the present invention.

Claims

1. A power supply method for a city sensing device based on the priority distribution of energy storage power supply on the street lamp side, characterized in that: The method comprises the following steps: S1. For the roadside power system in the area covered by the street lamp side energy storage power supply, establish a classified electrical appliance power supply label and electrical appliance energy consumption model; S2. Obtain the current power supply status of the area covered by the energy storage power supply on the street lamp side; S3. According to the current power supply status of the area covered by the energy storage power supply on the street lamp side, a power supply plan is determined using the classified electrical appliance power supply label and the electrical appliance energy consumption model: S31. If the area covered by the energy storage power supply on the street lamp side is in a normal power supply state, the power supply system optimizes the power supply cost in real time and monitors the status of electrical appliances in real time; S32. If a power supply failure occurs in the area covered by the energy storage power supply on the street lamp side, the energy storage stack and the electrical appliances form a regional microgrid, and the power of the energy storage stack is distributed to the electrical appliances in a tiered manner according to the power supply priority of the electrical appliances; S33. The energy storage stack adjusts the output power of the energy storage stack through the state of charge management strategy and the droop control strategy to maintain the frequency stability of the microgrid system.

2. The power supply method for city sensing device based on street lamp side energy storage power priority distribution according to claim 1 is characterized in that: In step S1, the roadside power system in the area covered by the street lamp side energy storage power supply is divided into power supply and electrical appliances, wherein the power supply is divided into mains power and energy storage battery stack; the electrical appliances are divided into control equipment, communication equipment, city sensing equipment, city lighting equipment, city management equipment, and convenience service equipment; the mains power distributes power to the electrical appliances through transformers and secondary distribution cabinets, and charges the energy storage battery stack in a power-deficient state, and the energy storage battery stack distributes power to the electrical appliances through the secondary distribution cabinet.

3. The power supply method for city sensing device based on street lamp side energy storage power priority distribution according to claim 2 is characterized in that: In the step S1, the establishment of a classified electrical appliance power supply label and an electrical appliance energy consumption model for the roadside power system in the area covered by the street lamp side energy storage power supply includes: S11. Determine the power supply label of the classified electrical appliances according to the roadside power system in the area covered by the street lamp side energy storage power supply; S12, based on the classified electrical appliance power supply tags, establishing electrical appliance energy consumption models corresponding to the classified electrical appliance power supply tags; In the step S12, based on the classified electrical appliance power supply tags, establishing electrical appliance energy consumption models corresponding to the classified electrical appliance power supply tags includes: S121. Use the following formula to establish a charging and discharging model of the energy storage stack for the charging and discharging process of the energy storage stack: in, is the energy storage stack capacity at time t, is the energy storage stack capacity at the previous measurement time before time t, is the energy storage stack capacity at time 0, is the rated capacity of the energy storage stack, is the charging power at time t, η char For the charging efficiency of the energy storage stack, is the discharge power at time t, η disc is the discharge efficiency of the energy storage stack, Δt is the interval between two adjacent measurement moments, is the maximum charging power, is the maximum discharge power, The shortest charging time to charge to 90% of the rated capacity of the energy storage stack is The shortest discharge time to discharge to 10% of the rated capacity of the energy storage stack. is the reactive power of the charging process at time t, is the reactive power of the discharge process at time t, and θ is the power factor of the energy storage stack; the energy storage stack charge and discharge model is used to measure the real-time capacity of the energy storage stack, calculate the real-time active power and reactive power output of the energy storage stack to match the power consumption of the electrical appliances, and limit the maximum charge and discharge power to ensure the stable operation of the energy storage stack; S122. Use the following formula to establish an energy consumption model for the control device: E cont =P comp ×T comp +P stan_cont ×T stan_cont P comp =P dyna +P leak_cont P stan_cont ≈P leak_cont P leak_cont =V rated_cont ×I leak_cont Among them, E cont To control the energy consumption of the equipment, P comp To control the power of the device during calculation, T comp To control the duration of the device state calculation, P stan_cont To control the power consumption of the device when it is in standby mode, T stan_cont To control the duration of the device standby state, P dyna To control the dynamic power of the device, P leak_cont is the static power of the control device, α is the switching activity factor, C is the load capacitance, V rated_cont is the rated voltage of the control device, f is the clock frequency, I leak_cont The energy consumption model of the control device is used to calculate the energy consumption of the control device in real time, as well as the power in the calculation state and the standby state, and to provide a reference value for the capacity allocated to the control device when the energy storage stack is powered by cascade; S123. Use the following formula to establish an energy consumption model for communication equipment: AND comm =And TX +E RX +E stan_comm AND RX =lE dyna_comm AND dyna_comm =P TX ×L÷R E stan_comm =V rated_comm ×I leak_comm ×T stan_comm Among them, E comm is the energy consumption of the communication equipment, E TX The energy consumption of the communication device to send data, E RX is the energy consumption of the communication device receiving data, E stan_comm is the energy consumption of the communication device in standby mode, l is the number of bits of data, E dyna_comm is the dynamic energy consumption of the communication equipment, is the energy consumption coefficient of the power amplifier of the communication equipment, d is the communication distance, P TX is the power of the communication device when sending data, L is the data length, R is the data rate, V rated_comm is the rated voltage of the communication equipment, I leak_comm is the leakage current of the communication equipment, T stan_comm The duration of the standby state of the communication device; the energy consumption model of the communication device is used to calculate the energy consumption of the communication device in real time, as well as the power in the dynamic and standby states, and to provide a reference value for the capacity allocated to the communication device when the energy storage stack is powered; S124. Use the following formula to establish an energy consumption model of the sensing device: AND sens =And dyna_sens +E stan_sens E dyna_sens =V rated_sens ×I work_sens ×T work_sens ×N sens E stan_sens =V rated_sens ×I leak_sens ×T stan_sens Among them, E sens To sense the energy consumption of the device, E dyna_sens is the energy consumption of the sensing device’s sensing state, E stan_sens To sense the energy consumption of the device in standby state, V rated_sens is the rated voltage of the sensing device, I leak_sens To sense the leakage current of the device in standby state, T stan_sens To sense the duration of the device standby state, I work_sens is the current when the sensing device senses the state, T work_sens N is the duration of a sensing device's sensing. sens The total number of sensing times of the sensing device in one working cycle; the energy consumption model of the sensing device is used to calculate the energy consumption of the sensing device in real time, as well as the power in the sensing state and the standby state, and to provide a reference value for the capacity allocated to the sensing device when the energy storage stack is powered; S125. Use the following formula to establish an energy consumption model for urban lighting equipment: AND light =And on_light +E stan_light AND on_light =P on_light ×T on_light P on_light =V rated_light ×I on_light AND stan_light =P stan_light ×T stan_light P stan_light =V rated_light ×I leak_light Among them, E light is the energy consumption of urban lighting equipment, E on_light is the energy consumption of urban lighting equipment in lighting state, E stan_light is the energy consumption of the controller when the urban lighting equipment is in standby mode, P on_light Power of urban lighting equipment, T on_light is the lighting time of urban lighting equipment, V rated_light is the rated voltage of urban lighting equipment, I on_light is the current of the urban lighting equipment in the lighting state, P stan_light is the power of the controller when the urban lighting equipment is in standby mode, T stan_light is the duration of the urban lighting equipment in standby mode, I leak_light The controller leakage current of the urban lighting equipment in the standby state; the energy consumption model of the urban lighting equipment is used to calculate the energy consumption of the urban lighting equipment in real time, as well as the power in the lighting state and the standby state, and is used to provide a reference value for the capacity allocated to the urban lighting equipment when the energy storage stack is powered by cascade; S126. Use the following formula to establish an energy consumption model for urban management equipment: AND mana =And on_mana +E stan_mana AND on_mana =P on_mana ×T on_mana P on_mana =V rated_mana ×I on_mana AND stan_mana =P stan_mana ×T stan_mana P stan_mana =V rated_mana ×I leak_mana Among them, E mana Energy consumption of urban management equipment, E on_mana Energy consumption when managing the state of urban lighting equipment, E stan_mana is the energy consumption of the controller when the urban management equipment is in standby state, P on_mana The power of the urban management equipment when it is working, T on_mana To manage the working hours of equipment for the city, V rated_mana is the rated voltage of the urban management equipment, I on_mana is the current of the urban management equipment in working state, P stan_mana is the power of the controller when the urban management equipment is in standby mode, T stan_mana The duration of the standby state of the city management equipment, I leak_mana The controller leakage current of the city management device in standby state; the energy consumption model of the city management device is used to calculate the energy consumption of the city management device in real time, as well as the power in the working state and the standby state, and is used to provide a reference value for the capacity allocated to the city management device when the energy storage stack is powered by cascade; S127. Use the following formula to establish the energy consumption model of convenience service equipment: AND serv =And on_serv +E stan_serv AND on_serv =P on_serv ×T on_serv P on_serv =V rated_serv ×I on_serv AND stan_serv =P stan_serv ×T stan_serv P stan_serv =V rated_serv ×I leak_serv Among them, E serv Energy consumption of convenience service equipment, E on_serv Energy consumption when managing the state of the convenience service equipment, E stan_serv The energy consumption of the controller when the convenience service equipment is in standby state, P on_serv The power of the convenience service equipment when it is working, T on_serv Working hours of the convenience service equipment, V rated_serv Rated voltage of the convenience service equipment, I on_serv The current of the convenience service equipment when it is in working state, P stan_serv The power of the controller when the convenience service equipment is in standby state, T stan_serv The duration of the standby state of the service equipment is leak_serv It is the controller leakage current of the convenience service equipment in standby state; the energy consumption model of the convenience service equipment is used to calculate the energy consumption of the convenience service equipment in real time, as well as the power in the working state and the standby state, and is used to provide a reference value for the capacity allocated to the convenience service equipment when the energy storage stack is powered on in stages.

4. The power supply method for city sensing device based on street lamp side energy storage power priority distribution according to claim 3 is characterized in that: In the step S31, if the area covered by the energy storage power supply on the street lamp side is in a normal power supply state, the power supply system optimizes the power supply cost in real time and monitors the state of the electrical appliances in real time, including: S311, Power supply cost optimization Divide the power supply time into off-peak and peak periods, determine the current period, and optimize the power supply cost based on the period and the real-time capacity of the energy storage stack; The power supply cost optimization is performed according to the time period and the real-time capacity of the energy storage stack, including: If it is a valley power period, the mains will charge the energy storage stack, and the mains will supply power to control equipment, communication equipment, city sensing equipment, city lighting equipment, city management equipment, and convenience service equipment; if it is a peak power period, the mains will stop charging the energy storage stack, and the energy storage stack will supply power to the power-consuming equipment, and the energy storage stack will be used to obtain the real-time capacity of the energy storage stack using the energy storage stack charging and discharging model, and adjust the power supply plan according to the real-time capacity of the energy storage stack; if the capacity of the energy storage stack is greater than 80% of the maximum capacity, the energy storage stack will supply power to control equipment, communication equipment, city sensing equipment, city lighting equipment, city management equipment, and convenience service equipment; if the capacity of the energy storage stack is less than 80% of the maximum capacity and is greater than 80% of the maximum capacity, the energy storage stack will be used to supply power to the control equipment, communication equipment, city sensing equipment, city lighting equipment, city management equipment, and convenience service equipment; If the capacity of the energy storage stack is less than 50% of the maximum capacity and greater than 20% of the maximum capacity, the energy storage stack will supply power to the control equipment, communication equipment, city sensing equipment, city lighting equipment, and city management equipment, and the convenience service equipment will be powered by the mains; if the capacity of the energy storage stack is less than 20% of the maximum capacity, the energy storage stack will stop supplying power to the power-consuming equipment, and the mains will supply power to the control equipment, communication equipment, city sensing equipment, city lighting equipment, city management equipment, and convenience service equipment; The power supply cost optimization is performed according to the time period and the real-time capacity of the energy storage stack, and the following model is used for implementation: When t∈T vall hour, Among them, T vall The off-peak electricity price period is is the mains output power, P char is the charging power of the energy storage stack, P cont To control the average power of the equipment, P comm is the average power of the communication equipment, P sens is the average power of the city sensing device, P light is the power of urban lighting equipment, P mana Average power of urban management equipment, P serv For the convenience of the people, the power of the equipment is E cont To control the energy consumption of the equipment, T cycle For one working cycle, E comm is the energy consumption of the communication equipment, E sens To sense the energy consumption of the device, P stan_light is the power of the controller when the urban lighting equipment is in standby mode, P on_light Power of urban lighting equipment, T light is the lighting period, T cons_light For lighting power saving period, E mana is the energy consumption of urban management equipment, P on_serv The power of the convenience service equipment when it is working, P stan_serv The power of the controller when the convenience service equipment is in standby state, T srev To provide convenience to the public during peak hours of equipment usage; When t∈T peak hour, in, is the mains output power, P cont To control the average power of the equipment, P comm is the average power of the communication equipment, P sens is the average power of the city sensing device, P light is the power of urban lighting equipment, P mana Average power of urban management equipment, P serv For the convenience of the people, the power of the equipment is T peak is the peak electricity price period, P disc is the discharge power of the energy storage stack, is the energy storage stack capacity at time t, The maximum capacity of the energy storage stack; S312, Real-time monitoring of electrical appliance status Obtain the minimum rated current, maximum rated current and minimum rated current of the electrical appliance, and monitor the state of the electrical appliance in real time according to the relationship among the minimum rated current, maximum rated current and minimum rated current of the electrical appliance to determine whether the state of the electrical appliance is abnormal; The real-time monitoring of the state of the electrical appliances to determine whether the state of the electrical appliances is abnormal includes: If the actual current of the electrical appliance is less than 50% of the minimum rated current or greater than 50% of the maximum rated current, the electrical appliance state at this time is determined to be abnormal; if the electrical appliance state is abnormal, the electrical energy of the abnormal energy consumption of the electrical appliance is measured, and the number of abnormal energy consumption occurrences is counted; if the electrical energy of the abnormal energy consumption of the electrical appliance exceeds the set maximum abnormal energy consumption, or the number of abnormal states of the electrical appliance is greater than the set maximum cumulative number of abnormal states, the power supply to the device is stopped; the electrical energy of the abnormal energy consumption of the electrical appliance is obtained by calculating the absolute value of the difference between the actual power of the electrical appliance and the power in the normal state within a working cycle; The real-time monitoring of the electrical appliance status is achieved using the following model: Among them, E abno is the abnormal energy consumption of electrical appliances, P norm is the normal power of the electrical appliance, I abno is the actual current of the electrical appliance, I rated_min is the minimum rated current of the electrical appliance, I rated_max is the maximum rated current of the electrical appliance, N abno is the number of abnormal states of electrical appliances, P actual is the actual power of the electrical appliance; For control equipment, use the following formula to find its minimum and maximum rated currents: I rated_min_cont =I leak_cont Among them, I rated_min_cont is the minimum rated current of the control device, I leak_cont To control the leakage current of the device, I rated_max_cont is the maximum rated current of the control device, P comp To control the power of the device, V rated_cont To control the rated voltage of the equipment; For communication equipment, use the following formula to calculate its minimum and maximum rated currents: I rated_min_comm =I leak_comm Among them, I rated_min_comm is the minimum rated current of the communication equipment, I leak_comm is the leakage current of the communication equipment, I rated_max_comm is the maximum rated current of the communication equipment, P TX The power of the communication device when sending data, V rated_comm is the rated voltage of the communication equipment; For city sensing devices, use the following formula to calculate the minimum and maximum rated currents: I rated_min_sens =I leak_senst I rated_max_sens =I work_sens Among them, I rated_min_sens is the minimum rated current of the city sensing device, I leak_senst is the leakage current of the city sensing device, I rated_max_sens is the maximum rated current of the city sensing device, I work_sens The current when the city sensing device senses the state; For urban lighting equipment, the minimum and maximum rated currents are obtained using the following formula: I rated_min_light =I leak_light I rated_max_light =I on_light Among them, I rated_min_light is the minimum rated current of urban lighting equipment, I leak_light is the leakage current of urban lighting equipment, I rated_max_light is the maximum rated current of urban lighting equipment, I work_sens The current when the urban lighting equipment is in the lighting state; For urban management equipment, the minimum and maximum rated currents are obtained using the following formula: I rated_min_mana =I leak_mana I rated_max_mana =I on_mana Among them, I rated_min_mana is the minimum rated current of urban management equipment, I leak_mana is the leakage current of the urban management equipment, I rated_max_mana is the maximum rated current of the urban management equipment, I on_mana The current when the urban management equipment is in working state; For convenience service equipment, use the following formula to calculate its minimum rated current and maximum rated current: I rated_min_serv =I leak_serv I rated_max_serv =I on_serv Among them, I rated_min_serv The minimum rated current of the convenience service equipment, I leak_serv Leakage current of the convenience service equipment, I rated_max_serv The maximum rated current of the convenience service equipment, I on_serv The current when the convenience service equipment is in working state.

5. The power supply method for city sensing device based on street lamp side energy storage power priority distribution according to claim 3 is characterized in that: In step S32, if a power supply failure occurs in the area covered by the energy storage power supply on the street lamp side, the energy storage stack and the electrical appliances form a regional microgrid, and the electric energy of the energy storage stack is distributed to the electrical appliances in a tiered manner according to the power supply priority of the electrical appliances, including: S321. Building regional microgrids When a power failure occurs, the electrical appliances in the area where the mains power supply fails are switched to the energy storage stack for power supply. The control equipment detects the circuit status, isolates the damaged line, and the remaining intact lines form the regional microgrid. S322. Determine the critical coefficient of electrical appliances The energy storage stack calculates the real-time capacity based on the energy storage stack charging and discharging model, and determines the critical coefficient α of different types of electrical appliances based on the power supply labels of classified electrical appliances. i ; Among them, the critical coefficient of the control device is α cont , the critical coefficient of the communication equipment is α comm , the critical coefficient of urban sensing equipment is α sens , the critical coefficient of urban lighting equipment is α light , the critical coefficient of urban management equipment is α mana , the importance coefficient of the convenience service equipment is α serv , α cont =α comm >>α sens >>α mana >>α light >>α serv ; S323. Calculate the energy consumption ratio of each electrical appliance Calculate the energy consumption ratio of each electrical appliance based on the energy consumption model of control equipment, communication equipment, city sensing equipment, city lighting equipment, city management equipment, and public service equipment; The calculation of the energy consumption ratio of each electrical appliance includes: S3231, using the energy consumption model of each electrical appliance to obtain the energy consumption of each electrical appliance; cont To control the energy consumption of the equipment, E comm is the energy consumption of the communication equipment, E sens is the energy consumption of the city sensing device, E light is the energy consumption of urban lighting equipment, E mana Energy consumption of urban management equipment, E serv Energy consumption of equipment for public convenience services; S3232. For any electrical appliance, use the following formula to calculate its energy consumption ratio: Among them, E i is the energy consumption of the appliance, is the total energy consumption of all electrical appliances in the set. For the roadside power system, the total energy consumption of all electrical appliances is The energy consumption ratio of the control equipment is obtained as follows: The energy consumption ratio of communication equipment is The energy consumption ratio of the control equipment is The energy consumption ratio of the control equipment is The energy consumption ratio of the control equipment is The energy consumption ratio of the control equipment is S324: Provide tiered distribution of power supply to electrical appliances According to the critical coefficients of different types of electrical appliances and the energy consumption ratio of the energy consumption model, the priority weights of electrical appliances are established, and the power supply plan is adjusted according to the priority weights of electrical appliances and the real-time capacity of the energy storage stack, and the power supply of electrical appliances is distributed in a tiered manner; S3241, using formula W i =k i ×α i Determine the priority weights of electrical appliances and obtain the priority weights of each electrical appliance; The priority weight of the control device is W cont =k cont ×α cont , the priority weight W of the communication device comm =k comm ×α comm , the priority weight W of the city sensing device sens =k sens ×α sens , the priority weight of urban lighting equipment is W light =k light ×α light , the priority weight of the city management equipment is W mana =k mana ×α mana , the priority weight of the convenience service equipment is W serv =k serv ×α serv , the priority weight relationship of each electrical appliance is: W cont =W comm >W sens >W mana >W light >W serv ; S3242, the power supply system determines the tiered power supply sequence according to the priority weights of the electrical appliances, allocates available capacity to the electrical appliances, and allocates power supply to the electrical appliances according to the real-time capacity; For control equipment, the entire capacity of the energy storage stack is used for power supply, that is, when hour, otherwise For communication equipment, the entire capacity of the energy storage stack is used for power supply, that is, when hour, otherwise For city sensing devices, the first 95% of the energy storage stack capacity is used for power supply, that is, when hour, otherwise For urban management equipment, the first 80% of the energy storage stack capacity is used for power supply, that is, when hour, otherwise For urban lighting equipment, the first 50% of the energy storage stack capacity is used for power supply, that is, when hour, otherwise For convenience service equipment, the first 20% of the energy storage stack capacity is used for power supply, that is, when hour, otherwise The distribution of power supply to electrical appliances according to real-time capacity is achieved by using the following formula: P main ＝0 Among them, P main is the mains output power, P disc is the discharge power of the energy storage stack, The power supply allocated to the control device, P cont To control the average power of the device, Power supply allocated to communication equipment, P comm is the average power of the communication equipment, Power allocated to city sensing devices, P sens is the average power of the city sensing device, Power supply allocated to urban management equipment, P mana Average power of urban management equipment, Power supply allocated to urban lighting equipment, P light is the power of urban lighting equipment, Power supply allocated to convenience service equipment, P serv To provide convenient service equipment power, is the energy storage stack capacity at time t, It is the maximum capacity of the energy storage stack. S3243. Obtain the real-time capacity of the energy storage stack and adjust the power supply plan according to the real-time capacity of the energy storage stack: If the capacity of the energy storage stack is greater than 80% of the maximum capacity, the energy storage stack will power control equipment, communication equipment, urban sensing equipment, urban lighting equipment, urban management equipment, and convenience service equipment; If the energy storage stack capacity is less than 80% of the maximum capacity and greater than 50% of the maximum capacity, the energy storage stack will supply power to the control equipment, communication equipment, city sensing equipment, city lighting equipment, and city management equipment, and the convenience service equipment will stop providing services to the outside world. If the capacity of the energy storage stack is less than 50% of the maximum capacity and greater than 20% of the maximum capacity, the energy storage stack will supply power to the control equipment, communication equipment, city sensing equipment, and city management equipment. At this time, the city lighting equipment and convenience service equipment will stop working. If the energy storage stack capacity is less than 20% of the maximum capacity and greater than 5% of the maximum capacity, the energy storage stack will power the control equipment, communication equipment, and city sensing equipment. At this time, the city management equipment, city lighting equipment, and convenience service equipment will stop working. If the capacity of the energy storage stack is less than 5% of the maximum capacity, the energy storage stack will power the control equipment and communication equipment. At this time, the city sensing equipment, city management equipment, city lighting equipment, and convenience service equipment will stop working.

6. The power supply method for city sensing device based on street lamp side energy storage power priority distribution according to claim 1 is characterized in that: In step S3, the energy storage stack adjusts the output power of the energy storage stack through the state of charge management strategy and the droop control strategy to maintain the frequency stability of the microgrid system, including: S331, according to the real-time capacity of the energy storage stack, using the charge state management strategy shown in the following formula, adjusting the output power of the energy storage stack to achieve charge state management of the energy storage stack; in, is the upper limit of the discharge power of the energy storage stack at time t, is the capacity of the energy storage stack at time t, is the maximum capacity of the energy storage stack, is the maximum discharge power of the energy storage stack, α, β, and γ are the discharge power coefficients of the energy storage stack at different capacities, and α<β<γ; S332, obtain the actual voltage, current, and frequency of the microgrid, and use the droop control strategy shown in the following formula to perform active-frequency control and reactive-voltage control to keep the frequency of the microgrid system within the set difference range of the rated frequency: Where f is the actual frequency of the microgrid system, f0 is the reference frequency, is the actual active power output of the microgrid system, P0 is the reference active power, k p is the active power-frequency droop coefficient, V L is the line voltage, I L is the line current, is the phase angle of current and voltage, V is the actual voltage of the microgrid system, V0 is the reference voltage, is the reactive power actually output by the microgrid system, Q0 is the reference reactive power, k q is the reactive power-voltage droop coefficient.

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