Field hybrid power supply system and short-time high-power emergency power supply method

Abstract

The invention discloses a field hybrid power supply system, which comprises a generator set, a storage and discharge module and a comprehensive control unit, and is characterized in that the comprehensive control unit is used for monitoring the power change of a load, and when the load power is within a rated load power range, the generator set supplies power; and at the moment that the load power exceeds the rated load power range, the generator set is controlled to stop supplying power to the load, the storage and discharge module supplies power to the load, the load power change is continuously monitored, and the generator set is controlled to supply power to the load according to the rated power of the generator set after a preset time period. Controlling the storage and discharge module to carry out margin supplementary power supply according to the load power; the invention further discloses a method capable of realizing short-time high-power emergency of the field hybrid power supply system. The large-current discharge capability of the storage and discharge module can be utilized to meet short-time large-load power supply, and the comprehensive control unit is utilized to intelligently call and distribute energy.

Description

Technical Field

[0001] The invention relates to the field of power supplies, and in particular to a hybrid power supply system for short-term high-power emergency power supply in the wild. Background Art

[0002] All types of aircraft, tanks, heavy vehicles, ships, etc. need power supply equipment. The army, industrial enterprises, etc. have formed a series of support equipment matching according to the model, which has played a positive role in the rapid formation of the combat effectiveness and support capabilities of the army and industrial enterprises. It is necessary to solve the problem that there is no power supply in the field during wartime and disaster relief. At present, there are corresponding field support power supplies. For example, CN107528379A discloses a hybrid oil-electric multifunctional integrated support power supply, which preliminarily solves the problem that the power supply cannot be guaranteed when there is no power supply in the field during wartime and disaster relief; it can realize multiple power supply guarantee functions including starting, AC / DC and field power generation. It is suitable for ground maintenance, field support and starting power supply of various types of aircraft, and can provide 28.5V DC and 220V AC to the outside. It can be transported randomly and by vehicle, and can be easily transferred to the field training and combat site. However, the current field power supply is a switch between a single fuel generator and battery power. Especially when a large load is used suddenly, the large load will use electricity for a short time and the small load will use electricity for a long time, resulting in high fuel consumption and low performance of the diesel generator set. Long-term operation will cause diesel engine failure, especially causing power outages in the field. Summary of the invention

[0003] In view of the above-mentioned shortcomings, the present invention provides a hybrid power supply system for short-term high-power emergency power supply in the field, which can utilize the high-current discharge capacity of the storage and discharge module to meet the short-term high-load power supply, and use the integrated control unit to intelligently call and distribute energy.

[0004] To achieve the above object, the embodiments of the present invention adopt the following technical solutions:

[0005] A field hybrid power supply system, the field hybrid power supply system comprises a generator set, a storage and discharge module and an integrated control unit, the integrated control unit controls the generator set and / or the storage and discharge module to supply power to the load according to the load power and the external power supply environment, the integrated control unit is used to monitor the power change of the load, and the generator set supplies power when the load power is within the rated load power range; the integrated control unit controls the generator set to stop supplying power to the load at the moment when the load power exceeds the rated load power range, and the storage and discharge module supplies power to the load instead, and continues to monitor the load power change, and controls the generator set to supply power to the load according to the rated power of the generator set after a preset time period, and controls the storage and discharge module to provide surplus supplementary power according to the load power.

[0006] According to one aspect of the present invention, the field hybrid power supply system includes a modular integrated platform, and the generator set, storage and discharge module and integrated control unit are modularly and detachably arranged on the modular integrated platform.

[0007] According to one aspect of the present invention, the generator set includes a diesel generator and a diesel generator control module, the diesel generator is connected to the integrated control unit via the diesel generator control module, and the diesel generator control module includes an electronically controlled circuit breaker.

[0008] According to one aspect of the present invention, the modular integrated platform is detachably provided with a fire protection module and a heat dissipation system.

[0009] According to one aspect of the present invention, a mains power external interface is provided on the modular integrated platform.

[0010] According to one aspect of the present invention, the storage and discharge module includes multiple batteries and a battery management module. The batteries are connected to the integrated control unit through the battery management module. The battery management module includes an electric control circuit breaker, an inverter and a rectifier.

[0011] A method for realizing short-term high-power emergency response of a field hybrid power supply system, the method comprising the following steps:

[0012] Real-time monitoring of load power changes through an integrated control unit;

[0013] When the load power is monitored to be within the rated power range of the generator set, the generator set supplies power to the load;

[0014] When it is detected that the load power exceeds the rated power range of the generator set, the integrated control unit controls the storage and discharge module to supply power to the load and controls the generator set to stop supplying power;

[0015] After the preset time period t, the integrated control unit allocates power to control the generator set to supply power to the load according to the rated power of the generator set, and controls the storage and discharge module to provide surplus supplementary power supply according to the load power.

[0016] According to one aspect of the present invention, the method includes: an integrated control unit monitors the charge state of the storage and discharge module. If it is monitored that the charge state reaches a predetermined low threshold, when the load power is lower than the rated power of the generator set, the generator set supplies power to the storage and discharge module through power allocation to charge the storage and discharge module.

[0017] According to one aspect of the present invention, the method includes: if it is monitored that the state of charge is lower than the low power alarm threshold and the load power is still greater than the rated power of the generator set, an insufficient power supply alarm is issued.

[0018] According to one aspect of the present invention, the preset time period t is set to 0<t≤200s.

[0019] Advantages of the present invention:

[0020] 1. Optimized the fuel utilization rate of diesel generator sets;

[0021] 2. Reduced diesel engine fuel consumption at low load;

[0022] 3. Use the high current discharge capacity of the storage and discharge module to meet the short-term large load power supply;

[0023] 4. Use the integrated control unit to intelligently call and distribute energy;

[0024] 5. The diesel generator set and storage and discharge module can achieve seamless switching of power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a principle block diagram of a field hybrid power supply system according to the present invention;

[0027] Figure 2 It is a structural schematic diagram of a field hybrid power supply system according to the present invention;

[0028] Figure 3 It is a structural schematic diagram of the diesel generator set of the present invention;

[0029] Figure 4 This is a schematic diagram of electrical connections of a field hybrid power supply system according to the present invention. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Embodiment 1

[0032] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, a field hybrid power supply system includes a generator set, a storage and discharge module and an integrated control unit. The integrated control unit controls the generator set and / or the storage and discharge module to supply power to the load according to the load power and the external power supply environment. The integrated control unit is used to monitor the power change of the load. When the load power is within the rated load power range, the generator set supplies power; when the load power exceeds the rated load power range, the integrated control unit controls the generator set to stop supplying power to the load, and the storage and discharge module supplies power to the load instead, and continues to monitor the load power change. After a preset time period, the generator set is controlled to supply power to the load according to the rated power of the generator set, and the storage and discharge module is controlled to provide surplus supplementary power according to the load power.

[0033] In practical applications, the outdoor hybrid power supply system includes a modular integrated platform, and the generator set, storage and discharge module and integrated control unit are modularly detachably arranged on the modular integrated platform. The modular structure is easy to disassemble, and each part is arranged in a partition, which is relatively independent and easy to maintain and replace.

[0034] In practical applications, the generator set includes a diesel generator and a diesel generator control module. The diesel generator is connected to the integrated control unit via the diesel generator control module. The diesel generator control module includes an electronically controlled circuit breaker.

[0035] In actual application, the modular integrated platform is detachably provided with a fire-fighting module and a cooling system. The compartments are separated to separate the diesel generator and the energy storage, reducing the impact of the temperature rise of the diesel generator on the energy storage inverter. There are 5 groups of battery clusters, which are installed on both sides of the cabin considering the influence of heat dissipation and external dimensions. The 5 converters are installed side by side on one side of the battery cluster in a plug-in box structure. The integrated control cabinet and air conditioner are respectively arranged at the ends of the cabin to facilitate operation and heat circulation. The gas tank of the fire-fighting system is arranged in the space above the converter side, and the fire-fighting control system is arranged in the diesel generator cabin.

[0036] In practical applications, the modular integrated platform is provided with a mains power external interface.

[0037] In practical applications, the storage and discharge module includes a plurality of batteries and a battery management module. The batteries are connected to the integrated control unit through the battery management module. The battery management module includes an electric control circuit breaker, an inverter and a rectifier. In this embodiment, the battery adopts a lithium iron phosphate battery with high reliability and fast charge and discharge characteristics. The system has the function of automatically controlling the unit and monitoring the operation of the unit. The system can display various electrical parameters of the unit, including voltage, current, power and power factor, etc., and can also display battery parameters such as battery power, charging current, and discharge current. The system can adapt to low-temperature operating environments, has good heat dissipation and explosion-proof capabilities, and has protection functions such as over-voltage, under-voltage, short circuit, and overload.

[0038] In this embodiment, if Figure 3 As shown, the field hybrid power supply system includes a hollow box 1, a vertical partition 11 is provided in the internal space of the box, and the partition divides the internal space of the box into two small spaces on the left and right, which are respectively set as a diesel generator compartment 12 and an energy storage compartment 13; a diesel generator set 121 and a diesel generator controller 122 are arranged in the diesel generator compartment, and a plurality of windows are opened on the compartment wall of the diesel generator compartment, and a radiator 123 is provided at any one or more windows, and a shutter 124 is provided on the window; a battery pack 131 and a battery manager 132 are arranged in the energy storage compartment, and the battery pack includes a plurality of groups of low-temperature lithium iron phosphate batteries; the energy storage compartment is also provided with an integrated control cabinet 2, and the integrated control cabinet is connected to the diesel generator controller and the battery manager respectively, and the integrated control cabinet is provided with an input and output interface 21; the battery manager 132 includes a junction box 1321 and an inverter unit 1322, and the inverter unit may include a PCS (bidirectional converter).

[0039] The energy storage compartment is also provided with an air conditioner 133, a fire protection system 134 and a pressure relief port 135. The air conditioner is used to control the temperature inside the energy storage compartment to ensure the working temperature of the internal battery pack. The fire protection system is provided so that the energy storage compartment can be quickly accessed when needed.

[0040] In practical applications, a water leakage hole is provided at the bottom of the diesel engine compartment, and electric air inlet and outlet shutters are provided on the sides and ends.

[0041] In practical applications, a base 3 is provided at the bottom of the box body, and a forklift hole 31 is provided on the base. The base can be a structure such as two relatively parallel channel steels, I-beams, square steels, etc.

[0042] In practical applications, the components of the field hybrid power supply system can adopt the following models:

[0043] According to the system logic and functional requirements, the main configuration and material selection are as follows:

[0044] Generator set models: Diesel generator set models such as GF-10 / GF-20 / GF-30 / GF-50 / GF-100, etc., with power options such as 30KW, etc., and can be customized according to actual situations;

[0045] Control module: Commercially available models such as HGM400 series power station automation controllers, etc. are preferred, and the low-temperature version is preferred, including RS485 and CAN communications;

[0046] Main circuit breaker for diesel generator: 125A / 4P leakage circuit breaker, with electric operation available;

[0047] Low-temperature lead-acid maintenance-free starting battery: 12Vdc 220Ah;

[0048] Jacket heater: Optional models such as EHA1010 self-circulating EHA / S-1KW, etc., AC220~240V;

[0049] Energy storage converter: Optional model PWS2-30M-CN produced by Shenzhen Shenghong Co., Ltd., in parallel;

[0050] Lithium battery cluster: 537.6V 20Ah low-temperature lithium iron phosphate battery cluster with self-heating and aerosol;

[0051] EMS: Commercially available models or models customized according to requirements can be used;

[0052] Hot and cold air conditioner: Commercially available products or customized products, 3kw;

[0053] Fire protection system: Heptafluoropropane fire sprinkler;

[0054] Circuit breaker for inverter AC output loop: 125A / 4P leakage circuit breaker, with electric operation available;

[0055] Built-in ATS: Dual-power automatic transfer switch, optional models such as SLKQ1-125 / 4P, etc.;

[0056] System output circuit breaker: 320A / 4P leakage circuit breaker.

[0057] As Figure 4 shown, the operation logic of the field hybrid power supply system described in this embodiment is as follows:

[0058] (1) After pressing the normal operation button on the EMS power management panel and the system self-check is okay, start the PCS and G1. PCS is the VF terminal, G1 is the PQ terminal. After synchronization, QF1 and QF2 are closed, and ATS1 sets the G2 path. In this state, when the battery is at 80% < SOC < 95, it charges and discharges shallowly with the minimum voltage and frequency stabilization requirements; when SOC < 80%, the diesel generator (except for load) charges the battery with a large current.

[0059] (2) When the high-power operation button is pressed on the EMS power management panel, when SOC < 95%, the diesel generator first charges the battery with a large current; when SOC > 95%, the panel displays a 10-second countdown. If no load of more than 40kW is detected during the timeout, the system automatically switches to normal operation mode. At this time, G1 outputs at a fixed power of 36kW, and the PCS and battery are responsible for supplementing the power;

[0060] (3) After the system load drops from 120kW to 39kW, the system resumes normal operation. The battery enters the charging state, and the system must ensure that the G1 does not shut down until the battery is fully charged;

[0061] (4) Press the battle mode button on both the control cabinet and the system screen to enter high-power operation and shield all shutdown functions caused by protection. Press the battle mode button again (for 3 seconds) and the protection function will be online.

[0062] Embodiment 2

[0063] A method for realizing short-term high-power emergency response of a field hybrid power supply system, the method comprising the following steps:

[0064] Step S1: monitor load power changes in real time through an integrated control unit;

[0065] Step S2: When it is monitored that the load power is within the rated power range of the generator set, the generator set supplies power to the load;

[0066] That is, when the load is small, the storage and discharge module is in hot standby state and does not carry any load, and the EMS energy management system calls on the power of the diesel generator set to bear the load.

[0067] Step S3: When it is monitored that the load power exceeds the rated power range of the generator set, the integrated control unit controls the storage and discharge module to supply power to the load and controls the generator set to stop supplying power;

[0068] Step S4: After the preset time period t, the integrated control unit allocates power to control the generator set to supply power to the load according to the rated power of the generator set, and controls the storage and discharge module to provide surplus supplementary power supply according to the load power.

[0069] When there is a short-term heavy load (exceeding the rated power of the diesel generator set), the storage and discharge module will take the heavy load impact first, and then transfer part of the load to the diesel generator set through the EMS energy management system. The storage and discharge module and the diesel generator set will jointly bear the short-term heavy load.

[0070] In this embodiment, the preset time period t is set to 0<t≤200s, that is, the short-term high-power time is within 200s.

[0071] When the diesel-to-diesel generator set has excess power, the storage and discharge module is charged through the EMS energy management system; if the diesel-to-diesel generator set fails, the storage and discharge module seamlessly switches to load.

[0072] In practical applications, the method includes: an integrated control unit monitors the charge state of the storage and discharge module. If the charge state is detected to reach a predetermined low threshold, when the load power is lower than the rated power of the generator set, the generator set supplies power to the storage and discharge module through power allocation to charge the storage and discharge module.

[0073] In practical applications, the method includes: if it is monitored that the state of charge is lower than the low power alarm threshold and the load power is still greater than the rated power of the generator set, an insufficient power supply alarm is issued.

[0074] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the art within the technical scope disclosed in the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A field hybrid power supply system, comprising a generator set, a storage and discharge module and an integrated control unit, wherein the integrated control unit controls the generator set and / or the storage and discharge module to supply power to the load according to the load power and the external power supply environment, characterized in that: The integrated control unit is used to monitor the power changes of the load, and when the load power is within the rated load power range, the generator set is used to supply power; at the moment when the load power exceeds the rated load power range, the integrated control unit controls the generator set to stop supplying power to the load, and the storage and discharge module is used to supply power to the load, and continues to monitor the load power changes. After a preset time period, the generator set is controlled to supply power to the load according to the rated power of the generator set, and the storage and discharge module is controlled to provide surplus supplementary power according to the load power.

2. The outdoor hybrid power supply system according to claim 1, characterized in that: The outdoor hybrid power supply system comprises a modular integrated platform, and the generator set, storage and discharge module and integrated control unit are modularly and detachably arranged on the modular integrated platform.

3. The outdoor hybrid power supply system according to claim 2, characterized in that: The generator set includes a diesel generator and a diesel generator control module. The diesel generator is connected to the integrated control unit via the diesel generator control module. The diesel generator control module includes an electric control circuit breaker.

4. The outdoor hybrid power supply system according to claim 2, characterized in that: The modular integrated platform is detachably provided with a fire protection module and a heat dissipation system.

5. The outdoor hybrid power supply system according to claim 1, characterized in that: The modular integrated platform is provided with a mains power external connection interface.

6. The outdoor hybrid power supply system according to any one of claims 1 to 5, characterized in that: The storage and discharge module includes a plurality of batteries and a battery management module. The batteries are connected to the integrated control unit via the battery management module. The battery management module includes an electric control circuit breaker, an inverter and a rectifier.

7. A method for realizing short-term high-power emergency response of a field hybrid power supply system, characterized in that: The method comprises the following steps: Real-time monitoring of load power changes through an integrated control unit; When the load power is monitored to be within the rated power range of the generator set, the generator set supplies power to the load; When it is detected that the load power exceeds the rated power range of the generator set, the integrated control unit controls the storage and discharge module to supply power to the load and controls the generator set to stop supplying power; After the preset time period t, the integrated control unit allocates power to control the generator set to supply power to the load according to the rated power of the generator set, and controls the storage and discharge module to provide surplus supplementary power supply according to the load power.

8. The method for realizing short-term high-power emergency response of a field hybrid power supply system according to claim 7, characterized in that: The method comprises: a comprehensive control unit monitors the charge state of the storage and discharge module, and if the charge state is monitored to reach a predetermined low threshold, when the load power is lower than the rated power of the generator set, the generator set supplies power to the storage and discharge module through power allocation to charge the storage and discharge module.

9. The method for realizing short-term high-power emergency response of a field hybrid power supply system according to claim 8, characterized in that: The method includes: if it is monitored that the state of charge is lower than the low power alarm threshold and the load power is still greater than the rated power of the generator set, an insufficient power supply alarm is issued.

10. The method for realizing short-term high-power emergency response of a field hybrid power supply system according to claim 7, characterized in that: The preset time period t is set to 0<t≤200s.

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