Compact cubicle substation with energy storage system

Abstract

The application discloses a compact box-type transformer substation with an energy storage system and is suitable for box-type transformer substation technology. The compact box-type transformer substation with the energy storage system comprises a photovoltaic upper top cover, a movable rain shield, a transformer chamber, a low-voltage chamber, a box body, a base, a battery pack, an energy storage converter, an energy management module, a battery management module, a ventilation plate, a radiator, an upper cover plate, an intelligent heat dissipation module, a photovoltaic cover plate at the upper end of the radiator, a column with a flow guide groove and a rainwater sensor. The transformer system, the energy storage system and the intelligent temperature control system are integrated in the box-type transformer substation, the transformer system and the energy storage system are arranged in an L shape, the energy storage system and the radiator are arranged in a Chinese character pin shape, and the structure is compact. The compact box-type transformer substation with the energy storage system can store energy at night when the electricity consumption is low, discharge electricity in the daytime when the electricity consumption is high, can also be used as an emergency power supply, and improves the electricity consumption quality.

Description

TECHNICAL FIELD

[0001] The present application relates to box-type substation technology, in particular to a compact box-type substation with an energy storage system, which is suitable for power systems, urban power distribution networks, industrial fields and commercial fields, and is used for peak-shaving power supply and improving the load rate of power distribution networks. BACKGROUND

[0002] A box-type substation is a mobile power supply device integrating power transformation equipment, power distribution equipment and control equipment. It has a compact and safe structure and is similar to a large steel box. The box-type substation is usually composed of a transformer, a circuit breaker, a control switch, a lightning arrester and a current transformer. It converts high-voltage current into low-voltage current that meets user needs by using these devices, thereby realizing power supply. The box-type substation can be customized according to user needs, can be quickly built at places where power is needed, and can be quickly disassembled and moved.

[0003] As an important power equipment, the box-type substation is increasingly used at home and abroad. In Europe, the proportion of the box-type substation as a new type of power transformation equipment of a complete outdoor substation introduced by the state in the distribution transformer is increasing. In China, with the rapid development of urban modernization and the requirement of the state for high-voltage direct access to load centers in the construction and transformation of urban and rural power grids, a power supply pattern of high-voltage power reception-transformer voltage reduction-low-voltage power distribution is formed, so the power distribution for power supply should develop towards land saving, power saving, miniaturization, compactness and unattended operation. The box-type substation is the best product with these characteristics, and therefore is widely used in urban and rural power grids.

[0004] Energy storage refers to the process of storing energy through a medium or device and releasing it when needed. Through flexible charging and discharging control, it realizes the matching of energy production and consumption in time and space, and relies on flexibility.

[0005] Energy storage is an important technology and basic equipment to support new power systems. It can provide peak shaving, frequency regulation, backup, black start and demand response support for power grid operation, and is an important means to improve the flexibility, economy and safety of traditional power systems. Energy storage can significantly improve the consumption level of renewable energy such as wind and light, support distributed power and microgrid, and is a key technology to promote the replacement of fossil energy by renewable energy. Energy storage can promote the open sharing and flexible trading of energy production and consumption, and realize multi-energy collaboration, which is the construction of an energy internet.

[0006] Grid-connected power generation system is directly connected with power distribution network, and electric energy is directly input into power grid. At present, energy storage system is generally not configured. With the serious phenomenon of "abandoned light and limited electricity" of photovoltaic and wind power generation, and the factors such as large fluctuation of power output of photovoltaic and wind power generation system, the utilization and promotion of renewable energy are increasingly restricted. After the related technology matures, the energy storage type box transformer combines the box transformer and the energy storage system, stores energy at night when the electricity consumption is low, discharges at daytime when the electricity consumption is high, reduces the burden of enterprises by using the price difference between peak and valley, ensures the power demand at the electricity consumption peak, and can also be used as an emergency power supply to improve the power quality.

[0007] Due to the development of new energy, informatization, networking and intelligent residential areas, it is of great practical significance to transform the box-type transformer substation into energy storage, compact, small and intelligent, to ensure the reliability and stability of power supply, improve power supply quality, and improve economic benefit and work efficiency.

[0008] Chinese patent 202010417789.6 discloses a compact box-type transformer substation assembly device and its use method, which sets fixed cover plates and movable cover plates, and a water collecting groove is arranged between the two movable cover plates to solve the heat dissipation problem in the compact box-type transformer substation in the prior art; Chinese patent 202310801129.1 discloses an energy storage type box-type transformer substation, which is provided with a brushing mechanism and a water outlet mechanism. The fan blades are rotated by wind power, driving the reciprocating screw rod to rotate, and the reciprocating screw rod drives the movable frame to slowly reciprocate in the movable groove, so as to brush the surface of the solar panel, prevent impurities from being pushed on the surface of the solar panel, and affect the use of the solar panel; Chinese patent 202321358294.6 discloses a box-type energy storage transformer substation for wind farms, which is provided with a buzzer and a smoke sensor to remind of fire in the first time, so as to effectively prevent the occurrence of fire; Chinese patent 202310509145.3 discloses a container-type energy storage transformer substation with good heat dissipation effect and a heat dissipation method thereof, which focuses on the heat dissipation method;

[0009] Chinese patent 202311054749.X provides an operation state control system of box-type transformer substation, relating to the technical field of power equipment monitoring. The operation state control system of box-type transformer substation comprises a transformer substation control system, which comprises a data acquisition system for data acquisition of each component of the box-type transformer substation, a front-end processing system for analog processing and prediction of the entire box-type transformer substation, a preprocessing system for processing collected data, an auxiliary end processing system for assisting the front-end processing system in data processing, and a dynamic simulation mapping unit cooperating with the front-end processing system for analog prediction; Chinese patent 202311150684.9 discloses a box-type transformer substation, belonging to the technical field of transformer substations, which comprises a box body, a through opening is formed in one side of the box body,

[0010] The notch is fixedly connected with a mounting frame outside the box body, a plurality of baffles are arranged in the mounting frame by folding, a dehumidification unit is arranged on the baffle, and the plurality of baffles are unfolded in the mounting frame by driving the supporting plate downward through the screw rod, so that the dehumidification unit on the baffle can process the water vapor in the air, and prevent too much water vapor from entering the box body to affect the electrical components; Chinese patent 202310474608.7 discloses a fast coordination control method and system for large-scale energy storage substation, which can concentrate all the energy storage converters PCS for coordinated control, improve the performance of energy storage substation in primary frequency modulation, realize unified fast coordination control of all station energy storage converters PCS, and ensure the safe and stable operation of power grid, and the focus is on the system operation and operation control and water vapor control of the energy storage substation.

[0011] In summary, the separation of traditional box-type substations and energy storage systems brings a series of problems, such as waste of electric energy resources, non-intelligentization of box-type substations, especially in recent years, with the rapid development of new energy technology and the wide application of energy storage technology, it is particularly important to miniaturize, compactify, intellectualize and energize the compact box-type substation with energy storage system, and it is necessary to explore a compact box-type substation with energy storage system to solve this problem. SUMMARY

[0012] The purpose of the present application is to provide a compact box-type substation with energy storage system, which integrates the power transformation system and the energy storage system in a compact box-type substation by increasing the energy storage system and the intelligent heat dissipation structure under the premise of ensuring the original voltage lifting of the box-type substation, realizes miniaturization design through specific structure, realizes heat dissipation through specific heat dissipation system and structure, further realizes the economization of the power system, and realizes the maximum efficiency of peak clipping and valley filling.

[0013] The purpose of the present application is achieved as follows: the compact box-type substation with energy storage system is composed of a photovoltaic upper cover, a movable rain shield, a transformer chamber, a low-voltage chamber, a box body, a base, a battery pack, an energy storage converter, an energy management module, a battery management module, a ventilation plate, a radiator, an upper cover plate, an intelligent heat dissipation module, a photovoltaic cover plate on the upper end of the radiator, a column with a flow guide groove and a rainwater sensor, the power transformation system includes the transformer chamber and the low-voltage chamber, the energy storage system includes the battery pack, the energy storage converter, the energy management module and the battery management module, the low-voltage chamber is connected with the energy storage converter, and the power transformation system and the energy storage system are cooled by the radiator and the intelligent heat dissipation module.

[0014] The compact box-type substation with an energy storage system, the low-voltage chamber and the transformer chamber are arranged in a "one" shape; the low-voltage chamber, the battery pack, the energy storage converter, the energy management module, and the battery management module are arranged in an "L" shape; the battery pack, the energy storage converter, the energy management module, the battery management module, and the radiator are arranged in a "pin" shape; the low-voltage chamber, the battery pack, and the energy storage converter, the energy management module, and the battery management module are provided with a photovoltaic upper cover; and the radiator and the transformer chamber are provided with a radiator upper end photovoltaic cover plate.

[0015] The photovoltaic upper cover of the compact box-type substation with an energy storage system is arranged in an "L" shape and is in a slope shape, and the shielding area range is the low-voltage chamber, the battery pack, and the energy storage converter, the energy management module, and the battery management module.

[0016] The real-time temperature values in the transformer chamber and the low-voltage chamber are obtained and are marked as the transformer real-time temperature TB and the low-voltage real-time temperature TD.

[0017] A rectangular coordinate system is established with time as the X-axis and the real-time temperature value as the Y-axis, the obtained transformer real-time temperature TB and low-voltage real-time temperature TD are substituted into the rectangular coordinate system, and a temperature curve is drawn in a dotting manner, so as to obtain the transformer real-time temperature curve and the low-voltage real-time temperature curve.

[0018] The transformer real-time temperature curve and the low-voltage real-time temperature curve are analyzed for overlap, the first-to-second area wave point difference, the first-to-second area lower rate difference, and the first-to-second area upper rate difference are added to obtain the first-to-second area overlap value ZCZ.

[0019] If the first-to-second area overlap value ZCZ is less than the first-to-second area overlap threshold ZCZy, a large-area influence signal is generated.

[0020] If the large-area influence signal is obtained, the working duration ZTd of the intelligent heat dissipation module is calculated by the formula , wherein CTd represents the difference between the current temperature of the low-voltage chamber and the preset working temperature, and Ps is the temperature regulation rate of the intelligent heat dissipation module, that is, the time required for working per degree Celsius.

[0021] The intelligent heat dissipation module of the compact box-type substation with an energy storage system is integrated on the upper cover plate, and the air outlet size can be adjusted according to the temperature and humidity in the substation.

[0022] The radiator upper end photovoltaic cover plate of the compact box-type substation with an energy storage system and the upper cover plate radiator upper end photovoltaic cover plate have an included angle of 10°-30° in the horizontal plane, so that rainwater flows into the guide groove, and the column with the guide groove is connected to the guide groove on the radiator upper end photovoltaic cover plate.

[0023] The ventilation plate material of the compact box-type substation with energy storage system is stainless steel, the ventilation plate has a plurality of small ventilation holes, and a movable rain shield is installed on the outside of the ventilation plate, and the movable rain shield can be automatically closed when the rain sensor senses rain, and the movable rain shield is in an open state at other times.

[0024] The battery pack, energy storage converter and transformer room of the compact box-type substation with energy storage system are cooled through a radiator and an intelligent cooling module.

[0025] The implementation method of the compact box-type substation with energy storage system is that the energy management module starts the energy storage mode in the evening when the power consumption of the distribution network is low, controls the battery management module to convert part of the low-voltage alternating current in the low-voltage room into direct current through the energy storage converter, and stores the direct current in the battery pack; the energy management module automatically starts the discharging mode in the daytime when the power consumption of the distribution network is high, controls the battery management module to convert the electrical energy stored in the battery pack into alternating current through the energy storage converter, and delivers the alternating current to the user end through the low-voltage room.

[0026] Another implementation method of the compact box-type substation with energy storage system is that when the energy management module monitors that the low-voltage room continuously outputs power, the energy storage mode is automatically started, the battery management module is controlled to convert part of the low-voltage alternating current in the low-voltage room into direct current through the energy storage converter, and the direct current is stored in the battery pack; when the energy management module monitors that the low-voltage room loses output power, the discharging mode is automatically started, the battery management module is controlled to convert the electrical energy stored in the battery pack into alternating current through the energy storage converter, and the alternating current is delivered to the user end through the low-voltage room.

[0027] The advantages of the compact box-type substation with energy storage system are simple structure, convenient operation and low cost; the peak-valley price difference is used to reduce the burden of enterprises while ensuring power demand during power consumption peaks; the substation can be used as an emergency power supply to improve power quality; the battery pack and the transformer are cooled through a radiator and an intelligent control module, so that the temperature and humidity in the substation can be effectively controlled; the power transformation system, the energy storage system and the temperature control system are integrated in the box-type substation and arranged in a 2x3 box layout, so that the structure is compact and the maximum utilization of resources can be realized; the rain sensor can intelligently sense the rain condition and automatically shield the place prone to water leakage. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 Figure is a compact box-type substation with an energy storage system;

[0029] In the figure: 1 - photovoltaic upper top cover;

[0030] 2 - movable rain shield;

[0031] 3 - transformer room;

[0032] 4 - low voltage chamber;

[0033] 5 - box;

[0034] 6 - base;

[0035] 7 - battery pack;

[0036] 8 - energy storage inverter;

[0037] 9 - energy management module;

[0038] 10 - battery management module;

[0039] 11 - ventilation plate;

[0040] 1101 - small ventilation hole;

[0041] 12 - radiator;

[0042] 13 - upper cover plate;

[0043] 14 - intelligent cooling module;

[0044] 15 - photovoltaic cover plate on the upper end of the radiator;

[0045] 1501 - flow guide groove;

[0046] 16 - column with flow guide groove;

[0047] 17 - rain sensor;

[0048] Figure 2 Rainy day working diagram of a compact box-type substation with energy storage system;

[0049] Figure 3 Ventilation plate diagram of a compact box-type substation with energy storage system;

[0050] Figure 4 Photovoltaic cover plate on the upper end of the radiator diagram of a compact box-type substation with energy storage system;

[0051] Figure 5 Substation system diagram of a compact box-type substation with energy storage system;

[0052] Figure 6 Temperature control system diagram of a compact box-type substation with energy storage system;

[0053] Figure 7 Principle diagram of a compact box-type substation with energy storage system. DETAILED DESCRIPTION

[0054] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0055] Referring to Figures 1-7 As shown in the drawings, the first example is a compact box-type substation with an energy storage system in a city power distribution network.

[0056] The compact box-type substation with an energy storage system comprises a photovoltaic upper cover 1, a movable rain shield 2, a transformer room 3, a low-voltage room 4, a box body 5, a base 6, a battery pack 7, an energy storage converter 8, an energy management module 9, a battery management module 10, a ventilation plate 11, a radiator 12, an upper cover plate 13, an intelligent heat dissipation module 14, a photovoltaic cover plate 15 at the upper end of the radiator, a column with a flow guide groove 16, and a rainwater sensor 17, as shown in Figure 1 The substation system comprises the transformer room 3 and the low-voltage room 4, and the energy storage system comprises the battery pack 7, the energy storage converter 8, the energy management module 9, and the battery management module 10. The low-voltage room 4 is connected to the energy storage converter 8. The substation system and the energy storage system are cooled by the radiator 12 and the intelligent heat dissipation module 14.

[0057] The compact box-type substation with an energy storage system, wherein the low-voltage room 4 and the transformer room 3 are arranged in a "one" shape; the low-voltage room 4, the battery pack 7, the energy storage converter 8, the energy management module 9, and the battery management module 10 are arranged in an "L" shape; the battery pack 7, the energy storage converter 8, the energy management module 9, the battery management module 10, and the radiator 12 are arranged in a "pin" shape; the low-voltage room 4, the battery pack 7, the energy storage converter 8, the energy management module 9, and the battery management module 10 are above the photovoltaic upper cover 1; and the radiator 12 and the transformer room 3 are above the photovoltaic cover plate 15 at the upper end of the radiator.

[0058] The photovoltaic upper cover 1 of the compact box-type substation with an energy storage system is arranged in an "L" shape and is in a slope shape. The shielding area ranges from the low-voltage room 4, the battery pack 7, the energy storage converter 8, the energy management module 9, and the battery management module 10.

[0059] The intelligent heat dissipation module 14 of the compact box-type substation with an energy storage system is integrated on the upper cover plate 13. The air outlet size can be adjusted according to the temperature and humidity in the substation.

[0060] The photovoltaic cover plate 15 at the upper end of the radiator of the compact box-type substation with an energy storage system has a 10° angle with the upper cover plate 13. The rainwater flows into the flow guide groove 1501. The column with a flow guide groove 16 is connected to the flow guide groove 1501 on the photovoltaic cover plate 15 at the upper end of the radiator.

[0061] The sunny day working mode of the compact box-type substation with energy storage system: the ventilation plate 11 is made of stainless steel, and has a plurality of small ventilation holes 1201; the outer surface of the ventilation plate 11 is provided with a movable rain shield 2, and the movable rain shield 2 is in an open state.

[0062] The rainy day working mode of the compact box-type substation with energy storage system: the ventilation plate 11 is made of stainless steel, and has a plurality of small ventilation holes 1201; the outer surface of the ventilation plate 11 is provided with a movable rain shield 2, and the movable rain shield 2 is in an open state.

[0063] The battery pack 7, the energy storage converter 8 and the transformer room 3 of the compact box-type substation with energy storage system are cooled by the radiator 12 and the intelligent cooling module 14.

[0064] The implementation method of the compact box-type substation with energy storage system is as follows:

[0065] 1) The energy management module 9 starts the energy storage mode when the power consumption valley is monitored at night, the low-voltage room 4 converts the low-voltage power of the transformer room 3 of the power transformation system into direct current through the energy storage converter 8, and stores the direct current in the battery pack 7.

[0066] 2) The energy management module 9 starts the discharging mode when the power consumption peak is monitored in the daytime, the electrical energy stored in the battery pack 7 is converted into alternating current through the energy storage converter 8, and is delivered to the user end through the low-voltage room 4.

[0067] 3) The energy management module 9 starts the discharging mode when the power outage mode is monitored in the daytime, the electrical energy stored in the battery pack 7 is converted into alternating current through the energy storage converter 8, and is delivered to the user end through the low-voltage room 4.

[0068] 2, the second example is a compact box-type substation with energy storage system in a new energy photovoltaic system, the solar photovoltaic panel of the new energy photovoltaic system absorbs solar energy and converts it into electrical energy, and the electrical energy is delivered to the power grid through the compact box-type substation with energy storage system.

[0069] The compact box-type substation with energy storage system is composed of a photovoltaic upper cover 1, a movable rain shield 2, a transformer room 3, a low-voltage room 4, a box body 5, a base 6, a battery pack 7, an energy storage converter 8, an energy management module 9, a battery management module 10, a ventilation plate 11, a radiator 12, an upper cover plate 13, an intelligent cooling module 14, a radiator upper end photovoltaic cover plate 15, a column body with a flow guide groove 16 and a rainwater sensor 17. Figure 1As shown, the power transformation system includes a transformer room 3 and a low-voltage room 4, and the energy storage system includes a battery pack 7, an energy storage converter 8, an energy management module 9, and a battery management module 10. The low-voltage room 4 is connected to the energy storage converter 8. The power transformation system and the energy storage system are cooled by a radiator 12 and an intelligent cooling module 14.

[0070] Further explanation of the principle of the radiator 12 is as follows:

[0071] The radiator is filled with refrigerant. The refrigerant in the radiator in the inner part of the door body absorbs heat in the box-type substation. The refrigerant is converted from liquid to gas. The gaseous refrigerant is transferred to the radiator in the outer part of the door body. The gaseous refrigerant releases heat to the air outside the box-type substation. The gaseous refrigerant is converted to liquid. The liquid refrigerant flows back to the radiator in the inner part of the door body.

[0072] The compact box-type substation with an energy storage system has a "one" type layout of the low-voltage room 4 and the transformer room 3. The low-voltage room 4, the battery pack 7, the energy storage converter 8, the energy management module 9, and the battery management module 10 have an "L" type layout. The battery pack 7, the energy storage converter 8, the energy management module 9, the battery management module 10, and the radiator 12 have a "pin" type layout. The upper part of the low-voltage room 4, the battery pack 7, the energy storage converter 8, the energy management module 9, and the battery management module 10 is a photovoltaic upper cover 1. The upper part of the radiator 12 and the transformer room 3 is a radiator upper end photovoltaic cover plate 15.

[0073] The photovoltaic upper cover 1 of the compact box-type substation with an energy storage system has an "L" type layout and is in a slope shape. The shielding area range is the low-voltage room 4, the battery pack 7, the energy storage converter 8, the energy management module 9, and the battery management module 10.

[0074] The intelligent cooling module 14 of the compact box-type substation with an energy storage system is integrated on the upper cover plate 13. The air outlet size can be adjusted according to the temperature and humidity in the substation.

[0075] The radiator upper end photovoltaic cover plate 15 of the compact box-type substation with an energy storage system has a 10° angle with the upper cover plate 13 in the horizontal plane, so that rainwater flows into the guide groove 1501. The column body 16 with a guide groove is connected to the guide groove 1501 on the radiator upper end photovoltaic cover plate 15.

[0076] The working mode of the compact box-type substation with an energy storage system on a sunny day is as follows: the ventilation plate 11 is made of stainless steel and has a plurality of small ventilation holes 1201. The movable rain shield 2 is installed on the outside of the ventilation plate 11 and is in an open state.

[0077] The rain day working mode of the compact box-type substation with the energy storage system: the ventilation plate 11 is made of stainless steel, and a plurality of small ventilation holes 1201 are arranged in the ventilation plate 11; the movable rain shield 2 is arranged outside the ventilation plate 11, and the movable rain shield 2 can be automatically closed when the rain sensor 17 senses rain; rain flows into the upper cover plate 13 through the photovoltaic upper top cover 1, and flows into the column body 16 with a flow guide groove through the flow guide groove 1501, and the liquid cooling function is realized.

[0078] The battery pack 7, the energy storage converter 8 and the transformer room 3 of the compact box-type substation with the energy storage system are cooled through the radiator 12 and the intelligent cooling module 14.

[0079] The implementation method of the compact box-type substation with the energy storage system is as follows:

[0080] 1) When the energy management module 9 monitors that it is a day and the solar panel continuously inputs current, the energy storage mode is started, the low-voltage room 4 converts the low-voltage power of the transformer room 3 of the power transformation system into direct current through the energy storage converter 8, and stores the direct current in the battery pack 7;

[0081] 2) When the energy management module 9 monitors that the solar cell panel outputs unstable current at night or on a cloudy day, the discharge mode is started, the electrical energy stored in the battery pack 7 is converted into alternating current through the energy storage converter 8, and is transmitted to the power grid system through the external high-voltage room.

[0082] The temperature sensors are arranged in the first monitoring area and the second monitoring area respectively, the real-time temperature values in the first monitoring area and the second monitoring area are obtained, and are marked as the transformer real-time temperature TB and the low-voltage real-time temperature TD;

[0083] The first monitoring area includes the low-voltage room 4 provided with the low-voltage electrical appliance and the transformer room 3 provided with the transformer electrical appliance;

[0084] The second monitoring area includes the area composed of the battery pack 7, the energy storage converter 8, the energy management module 9 and the battery management module 10;

[0085] The right-angle coordinate system is established with time as the X-axis and the real-time temperature value as the Y-axis, the obtained first monitoring area real-time temperature TB and the second monitoring area real-time temperature TD are substituted into the right-angle coordinate system, and the temperature curve is drawn in the dotting mode, so that the first monitoring area real-time temperature curve and the second monitoring area real-time temperature curve are obtained;

[0086] All the peak points and the valley points in the first monitoring area real-time temperature curve are obtained, all the obtained peak points and the valley points are added and summed, and the first monitoring area wave point total value is obtained;

[0087] Obtaining the slope of adjacent peak points to trough points to get the falling slope, adding all the falling slopes to get the total falling slope of the first monitoring area, obtaining the slope of adjacent trough points to peak points to get the rising slope, adding all the rising slopes to get the total rising slope of the first monitoring area;

[0088] Obtaining all the peak points and trough points in the second monitoring area real-time temperature curve, adding all the obtained peak points and trough points to get the total wave point value of the second monitoring area;

[0089] Obtaining the slope of adjacent peak points to trough points to get the falling slope, adding all the falling slopes to get the total falling slope of the second monitoring area, obtaining the slope of adjacent trough points to peak points to get the rising slope, adding all the rising slopes to get the total rising slope of the second monitoring area;

[0090] Performing coincidence analysis on the first monitoring area real-time temperature curve and the second monitoring area real-time temperature curve;

[0091] Calculating the difference between the total wave point value of the first monitoring area and the total wave point value of the second monitoring area to get the first-second area wave point difference, calculating the difference between the total falling slope of the first monitoring area and the total falling slope of the second monitoring area to get the first-second area falling rate difference, and calculating the difference between the total rising slope of the first monitoring area and the total rising slope of the second monitoring area to get the first-second area rising rate difference;

[0092] Adding the first-second area wave point difference, the first-second area falling rate difference and the first-second area rising rate difference to get the first-second area overlap value ZCZ;

[0093] Comparing the first-second area overlap value ZCZ with the first-second area overlap threshold ZCZy;

[0094] If the first-second area overlap value ZCZ is greater than or equal to the first-second area overlap threshold ZCZy, a small area influence signal is generated;

[0095] If the first-second area overlap value ZCZ is less than the first-second area overlap threshold ZCZy, a large area influence signal is generated;

[0096] When the small influence signal is obtained, the first monitoring area and the second monitoring area are continuously cooled; the working time ZTd of the intelligent cooling module 1 is calculated by the formula ; wherein CTb represents the difference between the current temperature of the first monitoring area and the preset working temperature; CTD represents the difference between the current temperature of the second monitoring area and the preset working temperature; Ps is the temperature adjustment rate of the intelligent cooling module (5), that is, the time required to work per degree Celsius;

[0097] If the large influence signal is obtained, the working time ZTd of the intelligent cooling module 1 is calculated by the formula , the working time ZTd of the intelligent heat dissipation module 1 is calculated;

[0098] The intelligent heat dissipation module 1 can monitor and analyze the temperatures of each area of the compact box-type substation in real time, judge the mutual influence, thereby accurately adjust and control the working time of the intelligent heat dissipation module 1, and ensure the safety of the compact box-type substation.

Claims

1. A compact cubicle transformer substation with energy storage system, characterized by: The power transformation system comprises a transformer room (3) and a low-voltage room (4), the energy storage system comprises a battery pack (7), an energy storage converter (8), an energy management module (9), and a battery management module (10), the low-voltage room (4) is connected with the energy storage converter (8), the power transformation system and the energy storage system are cooled through a radiator (12) and an intelligent cooling module (14), wherein the low-voltage room (4) and the transformer room (3) are arranged in a "I" shape, the low-voltage room (4), the battery pack (7), the energy storage converter (8), the energy management module (9), and the battery management module (10) are arranged in an "L" shape, and the battery pack (7), the energy storage converter (8), the energy management module (9), the battery management module (10), and the radiator (12) are arranged in a "pin" shape. Real-time temperature values in the first monitoring area and the second monitoring area are obtained and marked as a transformer real-time temperature TB and a low-voltage real-time temperature TD. The first monitoring area comprises a low-voltage room (4) provided with low-voltage electrical appliances and a transformer room (3) provided with transformer electrical appliances. The second monitoring area comprises an area formed by the battery pack (7), the energy storage converter (8), the energy management module (9), and the battery management module (10). A rectangular coordinate system is established with time as the X-axis and the real-time temperature value as the Y-axis, the obtained transformer real-time temperature TB and the low-voltage real-time temperature TD are substituted into the rectangular coordinate system, and a temperature curve is drawn in a dotting manner, so that a transformer real-time temperature curve and a low-voltage real-time temperature curve are obtained. The transformer real-time temperature curve and the low-voltage real-time temperature curve are subjected to overlap analysis, and a first-to-second-area wave point difference, a first-to-second-area lower rate difference, and a first-to-second-area upper rate difference are added to obtain a first-to-second-area overlap value ZCZ. If the first-to-second-area overlap value ZCZ is less than a first-to-second-area overlap threshold ZCZy, a large-area influence signal is generated. If the first-to-second-area overlap value ZCZ is greater than or equal to the first-to-second-area overlap threshold ZCZy, a small-area influence signal is generated. When the small signal is obtained, the first monitoring area and the second monitoring area are continuously cooled; the working time ZTd of the intelligent cooling module (14) is calculated by the formula ; wherein, CTb represents the difference between the current temperature of the first monitoring area and the preset working temperature; CTd represents the difference between the current temperature of the second monitoring area and the preset working temperature; Ps is the temperature regulation rate of the intelligent cooling module (14), that is, the time required to work per degree Celsius. If the large signal is obtained, the working time ZTd of the intelligent heat dissipation module (14) is calculated through the formula .

2. A compact cubicle transformer substation with energy storage system according to claim 1, characterized in that: The low-voltage room (4), the battery pack (7), and the energy storage converter (8), the energy management module (9), and the battery management module (10) are above a photovoltaic upper top cover (1), and the radiator (12) and the transformer room (3) are above a radiator upper end photovoltaic cover plate (15).

3. A compact cubicle transformer substation with energy storage system according to claim 1, characterized in that: The photovoltaic upper top cover (1) is arranged in an "L" shape and is in a slope shape, and a shielding area range of the photovoltaic upper top cover (1) is the low-voltage room (4), the battery pack (7), and the energy storage converter (8), the energy management module (9), and the battery management module (10).

4. A compact cubicle transformer substation with energy storage system according to claim 1, characterized in that: The intelligent cooling module (14) is integrated on the upper cover plate (13), and an air volume is adjusted according to the temperature and humidity in the power transformation station.

5. A compact cubicle transformer substation with energy storage system according to claim 1, characterized in that: The radiator upper end photovoltaic cover plate (15) and the upper cover plate (13) have an included angle of 10°-30° in a horizontal plane, so that rainwater flows into a guide groove (1501), and a column body (16) with the guide groove is connected with the guide groove (1501) on the radiator upper end photovoltaic cover plate (15).

6. A compact cubicle transformer substation with energy storage system according to claim 1, characterized in that: The ventilation plate (11) has a plurality of small ventilation holes (1101).

7. A compact cubicle substation with energy storage system as claimed in claim 1, wherein: The outer side of the ventilation plate (11) is provided with a movable rain shield (2), which is automatically closed when the rain sensor (17) senses rain or snow, and is in an open state at other times.

8. A compact cubicle substation with energy storage system according to claim 1, characterized in that: The photovoltaic upper cover (1) and the upper end photovoltaic cover plate (15) of the heat sink are provided with photovoltaic power generation plates, and the compact box-type substation with an energy storage system stores power of the self power generation plates and stores power from other channels.

9. A compact cubicle substation with energy storage system as claimed in claim 1, wherein: The implementation method of the compact box-type substation with an energy storage system is as follows: 1) The energy management module (9) starts the energy storage mode in the evening when the power consumption of the distribution network is low, controls the battery management module (10) to convert part of the low-voltage alternating current in the low-voltage chamber (4) into direct current through the energy storage converter (8), and stores the direct current in the battery pack (7); 2) The energy management module (9) automatically starts the discharging mode when the power consumption of the distribution network is high in the daytime, controls the battery management module (10) to convert the electrical energy stored in the battery pack (7) into alternating current through the energy storage converter (8), and delivers the alternating current to the user end through the low-voltage chamber (4).

10. The compact cubicle transformer substation with energy storage system according to claim 1, characterized in that: Another implementation method of the compact box-type substation with an energy storage system is as follows: 1) When the energy management module (9) monitors that the low-voltage chamber (4) continuously outputs power, the energy storage mode is automatically started, the battery management module (10) is controlled to convert part of the low-voltage alternating current in the low-voltage chamber (4) into direct current through the energy storage converter (8), and the direct current is stored in the battery pack (7); 2) When the energy management module (9) monitors that the low-voltage chamber (4) loses output power, the discharging mode is automatically started, the battery management module (10) is controlled to convert the electrical energy stored in the battery pack (7) into alternating current through the energy storage converter (8), and the alternating current is delivered to the user end through the low-voltage chamber (4).

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