CN115133636A - Hybrid power supply system and configuration method thereof - Google Patents
Hybrid power supply system and configuration method thereof Download PDFInfo
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- CN115133636A CN115133636A CN202211044222.4A CN202211044222A CN115133636A CN 115133636 A CN115133636 A CN 115133636A CN 202211044222 A CN202211044222 A CN 202211044222A CN 115133636 A CN115133636 A CN 115133636A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
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Abstract
The invention relates to a hybrid power supply system and a configuration method thereof. The hybrid power system at least comprises a solar power generation module, an energy storage battery pack, a super capacitor and a management unit. The management unit is configured to: and under the condition that the generated power of the solar power generation module or the power consumption of the load changes, at least acquiring the electrical parameters of the power supply system, and controlling the working mode of the power supply system based on the electrical parameters. The electrical parameters at least comprise the voltage value and the current value of the energy storage battery pack and/or the super capacitor. According to the invention, the power supply state of the energy storage battery pack and/or the super capacitor is adjusted by acquiring the electric parameters of the power supply system and combining with the trigger control and the prediction control, so that the power supply system can realize quick dynamic response to various changes of the solar power generation module and the load in the power grid, realize power balance and ensure the stable bus voltage.
Description
Technical Field
The invention relates to the technical field of satellite power supply, in particular to a hybrid power supply system and a configuration method thereof.
Background
At present, most of artificial satellites all use solar energy as energy, due to the influence of the environment, particularly the influence of solar illumination, solar power generation is intermittent, loads in a satellite power grid are changed at any moment due to time factors and external factors, therefore, an energy storage system is usually installed on the satellite, the energy storage system stores electric energy when the generated energy is sufficient, the electric energy is released when the generated energy is in short supply to balance the power mismatch between renewable energy power generation and the loads in the satellite power grid, and therefore bus voltage is stabilized. With the heavy use of hybrid power systems on satellites, research on energy management of satellite power sources is increasing. Aiming at the defects that a nonlinear system is insufficient in robustness, poor in dynamic response and incapable of introducing boundary conditions, the prior art mostly utilizes a linear control method. The linear control method needs real-time online prediction and optimization, and involves a large amount of matrix operations, so that the demand for computing resources is harsh, and the computing burden is heavy.
The Chinese patent application with the publication number of CN105140984A discloses an autonomous management system of a power supply subsystem of a lithium ion storage battery pack for a satellite, which comprises an on-track management module, an emergency protection module, a balance control module and a lower computer module, wherein the on-track management module is used for preventing the lithium ion storage battery pack from being overcharged; the emergency protection module is used for preventing the lithium ion storage battery pack from being over-discharged; the balancing control module is used for balancing the voltage among the lithium ion storage battery monomers in the lithium ion storage battery pack; the lower computer module is used for sampling and comparing the voltage of each lithium ion storage battery monomer in the lithium ion storage battery pack. The conversion control of the power supply subsystems is completed by adjusting and controlling the charging and discharging of the storage battery pack and the shunting of redundant power output by the solar battery array, the stability of power supply of the bus and each subsystem is kept, and the power supply and distribution requirements of each load on a satellite are met.
Chinese patent application publication No. CN112865242A discloses a satellite power supply system multi-energy interconnection power supply energy control system and method, including: the system comprises a multi-energy interconnection power supply device for supplying power to a bus, a multi-energy interconnection energy management device for integrally managing power distribution and charging/discharging control of each power supply device submodule and a satellite power supply heat management device for performing low-temperature cold start preheating and high-temperature heat dissipation control on the multi-energy interconnection power supply device submodule. The comprehensive energy management method for the multi-energy interconnection power supply is established by fusing and applying a distributed control technology and a hierarchical supervision and management technology and based on a cooperative control rule and a fuzzy logic algorithm, so that the service life, the reliability and the robustness of the in-orbit satellite power supply system are improved.
Aiming at the defects of the prior art, the invention provides a hybrid power supply system and a configuration method thereof, the energy management performance of a satellite power grid is improved through a trigger type energy management strategy, the power supply system can rapidly and dynamically respond various changes of photovoltaic and loads in the satellite power grid through reasonably designed trigger conditions while ensuring the effective operation of the satellite power grid, the power balance is realized, the voltage stability of a bus is ensured, unnecessary operation and control actions are avoided, and the operation resource requirement and the switching loss are reduced.
Furthermore, on the one hand, due to the differences in understanding to those skilled in the art; on the other hand, since the applicant has studied a great deal of literature and patents when making the present invention, but the disclosure is not limited thereto and the details and contents thereof are not listed in detail, it is by no means the present invention has these prior art features, but the present invention has all the features of the prior art, and the applicant reserves the right to increase the related prior art in the background.
Disclosure of Invention
The invention provides a hybrid power system which at least comprises a solar power generation module, an energy storage battery pack, a super capacitor and a management unit. The management unit is configured to: and under the condition that the generated power of the solar power generation module or the power consumption of the load changes, at least acquiring the electrical parameters of the power supply system, and adjusting the working mode of the power supply system based on the electrical parameters. The electrical parameters at least comprise the voltage value and the current value of the energy storage battery pack and/or the super capacitor.
Preferably, the power supply system adjusts the power supply state of the energy storage battery pack and/or the super capacitor by acquiring the electrical parameters of the power supply system and combining with trigger control and predictive control, so that the power supply system can realize quick dynamic response to various changes of a solar power generation module and a load in a power grid, realize power balance and ensure the stability of bus voltage.
According to a preferred embodiment, the solar power module, the energy storage battery pack and the super capacitor are respectively connected to a power supply bus through an inverter and supply power to the load through an output port. The management unit controls the power supply states of the solar power generation module, the energy storage battery pack and the super capacitor by controlling the working states of the three converters. The converter connected with the solar power generation module is a first converter, the converter connected with the energy storage battery pack is a second converter, and the converter connected with the super capacitor is a third converter.
Preferably, the second converter may be a half-bridge converter composed of a second inductor, a third semiconductor device, and a fourth semiconductor device. Preferably, the third converter may be a half-bridge converter composed of a third inductor, a fifth semiconductor device, and a sixth semiconductor device. Preferably, the first converter may be a photovoltaic converter composed of a first inductor, a first semiconductor device, and a second semiconductor device. Preferably, the inductance values of the second inductor and the third inductor are the same. Preferably, the first semiconductor device may be a freewheeling diode. Preferably, the second semiconductor device, the third semiconductor device, the fourth semiconductor device, the fifth semiconductor device and the sixth semiconductor device all adopt switching diodes. Under the condition that the illumination intensity and/or the load power are/is changed, the three converters respectively control the power supply states of the solar power generation module, the energy storage battery pack and the super capacitor in response to the control of the management unit, so that the power balance is realized, and the stable bus voltage is ensured.
According to a preferred embodiment, the management unit is configured to: and constructing a state model describing the power supply system, and acquiring the electrical parameters of the power supply system in the process that the solar power generation module and/or the energy storage battery pack and/or the super capacitor supplies power to the load.
According to a preferred embodiment, the management unit is configured to: and calculating an estimated value of the total current value required to be provided by the energy storage battery pack and the super capacitor based on the state model and the electrical parameters.
Preferably, using the equation of state of the present invention, the following can be expressed:
C*dV 0 (t)/dt=I 1 (t)+I 2 (t)*(1-Q 2 (t))+I 3 (t)*(1-Q 3 (t))-I 4 (t)；
wherein t is a time variable, C is a capacitance value of the bus capacitor, and V 0 Is the bus voltage, I 1 Is the output current of the solar power module, I 2 Is the output current, Q, of the energy storage battery pack 2 Is said second square wave signal, I 3 Is the output current, Q, of the supercapacitor 3 Is said third party wave signal, I 4 Is the load current.
The total value of the current required to be provided by the energy storage battery pack and the super capacitor is I 5 The expression is as follows:
I 5 =I 4 -I 1 ；
I 5 is estimated as I 6 The expression is as follows:
I 6 =(I 2 *(1-Q 2 )+I 3 *(1-Q 3 )-C*V 0 )*ω/(1+ω)；
preferably, the management unit may obtain the estimated value of the total current value required to be provided by the energy storage battery pack and the super capacitor by using local information, that is, the capacitance value of the bus capacitor, the bus voltage, the output current of the energy storage battery pack, the second square wave signal, the output current of the super capacitor, and the third square wave signal, without obtaining the load current and the output current of the solar power generation module. Preferably, the management unit adds a low-pass filter with a cutoff frequency ω to eliminate high-frequency noise interference caused by a left-side differential term in the state equation when obtaining the estimated value. Preferably, the management unit can determine the working mode of the power supply system based on the estimated value to generate the corresponding second square wave signal and the third square wave signal, so as to complete energy management of the hybrid power supply system, achieve power balance, and ensure stable bus voltage.
According to a preferred embodiment, the management unit is configured to: and constructing a generation model of the square wave signals, and generating a second square wave signal for controlling the working state of the second converter and a third square wave signal for controlling the working state of the third converter according to the estimated value, the electrical parameter and the working mode of the power supply system. The working modes of the power supply system at least comprise a first mode that the generated power of the solar power generation module is larger than the electric power of the load, a second mode that the generated power of the solar power generation module is equal to the electric power of the load, and a third mode that the generated power of the solar power generation module is smaller than the electric power of the load.
According to a preferred embodiment, the management unit comprises at least a photovoltaic signal generator, a current monitor, a processing module and a controller. The photovoltaic signal generator generates a first square wave signal for controlling the working state of the first converter by using a maximum power point tracking algorithm for the solar power generation module, and sends the first square wave signal to the controller, so that the solar power generation module supplies power with maximum power under different illumination intensities. The current monitor is used for collecting the electrical parameters of the power supply system and transmitting the collected electrical parameters to the processing module. The processing module is used for generating the second square wave signal and the third square wave signal and sending the second square wave signal and the third square wave signal to the controller. The controller can control the working state of the converter based on the received square wave signal, and further control the power supply state of the solar power generation module and/or the energy storage battery pack and/or the super capacitor.
According to a preferred embodiment, the processing module comprises at least a triggering layer and a computation layer. In response to receipt of the electrical parameter, the processing module assigns the electrical parameter to the trigger layer. The trigger layer selects a working mode of the power supply system based on the electrical parameter and verifies whether the electrical parameter meets a trigger condition for changing the working mode of the power supply system, thereby determining whether the calculation layer updates the second square wave signal and the third square wave signal. The computing layer is configured to: and under the condition that the trigger layer verifies that the electrical parameters meet the trigger conditions, receiving the electrical parameters from the trigger layer to calculate target values of the energy storage battery pack and the super capacitor, and calculating the second square wave signal and the third square wave signal according to the target values.
According to a preferred embodiment, the trigger layer comprises at least a sampler and a decider. The sampler is used for storing the electrical parameter transmitted to the processing module by the current monitor. The judger is used for verifying whether the electrical parameter meets the triggering condition. The sampler is configured to: transmitting the stored electrical parameter to the computing layer if the determiner verifies that the result is a true value. The determiner is configured to: and under the condition that the verification is completed, sending a verification result to the computing layer so as to control the working state of the computing layer.
According to a preferred embodiment, the computing layer is configured to: in the case that a true value verification result is received, the electrical parameter is received, and the second square wave signal and the third square wave signal are calculated based on the electrical parameter. The second square wave signal and the third square wave signal are sent to the controller and the judger so as to complete the adjustment of the power supply states of the energy storage battery pack and the super capacitor and the update of the trigger condition of the judger.
The invention also provides a configuration method of the hybrid power supply system. The method at least comprises the following steps: in the case where a change occurs in the generated power of the solar power generation module or the electricity usage of the load, the management unit acquires at least an electrical parameter of the power supply system, and controls the operation mode of the power supply system based on the electrical parameter. The electrical parameters at least comprise the voltage value and the current value of the energy storage battery pack and/or the super capacitor.
Drawings
FIG. 1 is a simplified schematic diagram of a power supply system in accordance with a preferred embodiment of the present invention;
FIG. 2 is a simplified schematic diagram of a management unit of a preferred embodiment provided by the present invention;
FIG. 3 is a simplified schematic diagram of a processing module in accordance with a preferred embodiment of the present invention.
List of reference numerals
100: a power supply system; 101: a solar power generation module; 102: an energy storage battery pack; 103: a super capacitor; 104: an output port; 105: a bus capacitor; 106: a first inductor; 107: a second inductor; 108: a third inductor; 109: a first semiconductor device; 110: a second semiconductor device; 111: a third semiconductor device; 112: a fourth semiconductor device; 113: a fifth semiconductor device; 114: a sixth semiconductor device; 120: a management unit; 121: a photovoltaic signal generator; 122: a current monitor; 123: a processing module; 124: a controller; 125: a trigger layer; 126: a sampler; 127: a judging device; 128: calculating a layer; 129: a filter; 130: a control calculator; 131: a target calculator.
Detailed Description
The following detailed description is made with reference to fig. 1 to 3.
The working states of the solar power generation module, the energy storage battery pack and the super capacitor are controlled through the management unit, and the energy management performance of the satellite power grid is improved through a trigger type energy management strategy. The hybrid power system and the configuration method thereof eliminate the current fluctuation of the hybrid energy storage system (the energy storage battery pack and the super capacitor) of the satellite power grid in the multi-mode by eliminating unnecessary operation and control actions in the energy management in the prior art.
Example 1
The invention provides a hybrid power system 100, which at least comprises a solar power generation module 101, an energy storage battery pack 102, a super capacitor 103 and a management unit 120. The management unit 120 is configured to: in the case where the generated power of the solar power generation module 101 or the power consumption of the load changes, at least the electrical parameter of the power supply system 100 is acquired, and the operation mode of the power supply system is controlled based on the electrical parameter. The electrical parameters include at least the voltage and current values of the energy storage battery pack 102 and/or the super capacitor 103.
Preferably, the power supply system 100 of the invention adjusts the power supply state of the energy storage battery pack 102 and/or the super capacitor 103 by acquiring the electrical parameters of the power supply system 100 and combining the trigger control and the predictive control, so that the power supply system 100 can realize fast dynamic response to various changes of the solar power generation module 101 and the load in the power grid, realize power balance and ensure the stable bus voltage.
Referring to fig. 1, preferably, the solar power generation module 101, the energy storage battery pack 102 and the super capacitor 103 are respectively connected to a power supply bus through an inverter, and power is supplied to a load through an output port 104. Preferably, a bus capacitor 105 is arranged on the bus. The management unit 120 controls the power supply states of the solar power generation module 101, the energy storage battery pack 102 and the super capacitor 103 by controlling the working states of the three converters. The inverter connected to the solar power generation module 101 is a first inverter, the inverter connected to the energy storage battery pack 102 is a second inverter, and the inverter connected to the super capacitor 103 is a third inverter.
Preferably, the second converter may be a half-bridge converter consisting of the second inductor 107, the third semiconductor device 111 and the fourth semiconductor device 112. Preferably, the third converter may be a half-bridge converter composed of the third inductor 108, the fifth semiconductor device 113 and the sixth semiconductor device 114. Preferably, the first converter may be a photovoltaic converter consisting of the first inductance 106, the first semiconductor device 109 and the second semiconductor device 110. Preferably, the inductance values of the second inductor 107 and the third inductor 108 are the same. Preferably, the first semiconductor device 109 may be a freewheeling diode. Preferably, the second semiconductor device 110, the third semiconductor device 111, the fourth semiconductor device 112, the fifth semiconductor device 113 and the sixth semiconductor device 114 each employ a switching diode. Under the condition that the illumination intensity and/or the load power are/is changed, the three converters respectively control the power supply states of the solar power generation module 101, the energy storage battery pack 102 and the super capacitor 103 in response to the control of the management unit 120, so that the power balance is realized, and the bus voltage is ensured to be stable.
Preferably, the management unit 120 is configured to: a state model describing the power supply system 100 is constructed, and electrical parameters of the power supply system are collected during the process of supplying power to the load by the solar power generation module 101 and/or the energy storage battery pack 102 and/or the super capacitor 103.
Preferably, the management unit 120 is configured to: and calculating an estimated value of the total current required to be provided by the energy storage battery pack 102 and the super capacitor 103 based on the state model and the electrical parameters.
Preferably, using the equation of state of the present invention, the following can be expressed:
C*dV 0 (t)/dt=I 1 (t)+I 2 (t)*(1-Q 2 (t))+I 3 (t)*(1-Q 3 (t))-I 4 (t)；
where t is a time variable, C is a capacitance of the bus capacitor 105, and V 0 Is the bus voltage, I 1 Is the output current of the solar power module 101, I 2 For the output current, Q, of the energy storage battery pack 102 2 Is a second square wave signal, I 3 Is the output current, Q, of the super capacitor 103 3 Is a third-party wave signal, I 4 Is the load current.
The total value of the current required to be provided by the energy storage battery pack 102 and the super capacitor 103 is I5, and the expression is as follows:
I 5 =I 4 -I 1 ；
I 5 is estimated as I 6 The expression is as follows:
I 6 =(I 2 *(1-Q 2 )+I 3 *(1-Q 3 )-C*V 0 )*ω/(1+ω)；
preferably, the management unit 120 may obtain the estimated value of the total current required to be provided by the energy storage battery pack 102 and the super capacitor 103 by using the local information, i.e., the capacitance value of the bus capacitor 105, the bus voltage, the output current of the energy storage battery pack 102, the second square wave signal, the output current of the super capacitor 103, and the third square wave signal, without obtaining the load current and the output current of the solar power generation module 101. Preferably, the management unit 120 adds a low-pass filter with a cutoff frequency ω to eliminate high-frequency noise interference caused by the left-side differential term in the state equation when obtaining the estimated value. Preferably, the management unit 120 can determine the operating mode of the power supply system based on the estimated value to generate the corresponding second square wave signal and third square wave signal, thereby completing energy management of the hybrid power supply system, achieving power balance, and ensuring stable bus voltage.
Preferably, the management unit 120 is configured to: and constructing a generation model of the square wave signals, and generating a second square wave signal for controlling the working state of the second converter and a third square wave signal for controlling the working state of the third converter according to the estimated value, the electrical parameters and the working mode of the power supply system. The operation modes of the power supply system include at least a first mode in which the generated power of the solar power generation module 101 is larger than the consumed power of the load, a second mode in which the generated power of the solar power generation module 101 is equal to the consumed power of the load, and a third mode in which the generated power of the solar power generation module 101 is smaller than the consumed power of the load.
Referring to fig. 2, preferably, the management unit 120 includes at least a photovoltaic signal generator 121, a current monitor 122, a processing module 123, and a controller 124. The photovoltaic signal generator 121 generates a first square wave signal for controlling an operating state of the first converter using a maximum power point tracking algorithm for the solar power generation module 101, and transmits the first square wave signal to the controller 124, so that the solar power generation module 101 is supplied with maximum power at different illumination intensities. A current monitor 122 for collecting electrical parameters of the power supply system and transmitting the collected electrical parameters to the processing module 123. And a processing module 123 for generating the second square wave signal and the third square wave signal, and sending the second square wave signal and the third square wave signal to the controller 124. Preferably, the duty cycle of the second square wave signal and the third square wave signal generated by the processing module 123 is different from that of the second square wave signal and the third square wave signal at the previous time. And the controller 124 can control the working state of the converter based on the received square wave signal, so as to control the power supply state of the solar power generation module 101 and/or the energy storage battery pack 102 and/or the super capacitor 103.
Preferably, the controller 124 transmits the first square wave signal to the second semiconductor device 110 so that the solar power generation module 101 can output electric power at maximum power. Preferably, the controller 124 divides the second square wave signal into two parts and outputs the two parts to the third semiconductor device 111 and the fourth semiconductor device 112, so as to change the magnitude and direction of the output current of the energy storage battery pack 102. Preferably, the second square wave signal is halved and then the signal output to the third semiconductor device 111 and the fourth semiconductor device 112 is inverted. Preferably, the controller 124 divides the third square wave signal into two parts and outputs the two parts to the fifth semiconductor device 113 and the sixth semiconductor device 114, so as to change the magnitude and direction of the output current of the super capacitor 103. Preferably, the third square wave signal is halved and then output to the fifth semiconductor device 113 and the sixth semiconductor device 114 with inverted signals.
Referring to fig. 3, preferably, the processing module 123 includes at least a triggering layer 125 and a computing layer 128. In response to receipt of the electrical parameter, the processing module 123 assigns the electrical parameter to the trigger layer 125. The triggering layer 125 selects an operation mode of the power supply system based on the electrical parameter and verifies whether the electrical parameter satisfies a triggering condition for changing the operation mode of the power supply system, thereby deciding whether the calculation layer 128 updates the second square wave signal and the third square wave signal. The computing layer 128 is configured to: under the condition that the triggering layer 125 verifies that the electrical parameter meets the triggering condition, the calculation layer 128 receives the electrical parameter from the triggering layer 125, and calculates target values of the energy storage battery pack 102 and the super capacitor 103, thereby calculating a second square wave signal and a third square wave signal according to the target values.
Preferably, the trigger layer 125 includes at least a sampler 126 and a decider 127. A sampler 126 for storing the electrical parameter transmitted by the current monitor 122 to the processing module 123. Preferably, the sampler 126 is also capable of obtaining the target value of the bus voltage by sampling the load that is accessed to the output port 104. A decider 127 for verifying whether the electrical parameter satisfies the trigger condition. The sampler 126 is configured to: in the case where the decider 127 verifies that the result is true, the stored electrical parameters are transmitted to the calculation layer 128. The determiner 127 is configured to: in the case where the verification is completed, the verification result is transmitted to the computation layer 128 to control the operation state of the computation layer 128. Preferably, the trigger condition may be theoretically designed based on a bus voltage value in the power supply system 100, a capacitance value of the bus capacitor 105, an output current and voltage of the energy storage battery pack 102, a second square wave signal, an output current and voltage of the super capacitor, a third square wave signal, and a pre-estimated value of a total current value required to be provided by the energy storage battery pack 102 and the super capacitor 103, and in combination with an event trigger control strategy.
Preferably, the computing layer 128 is configured to: in case of receiving a true value verification result, an electrical parameter is received, and a second square wave signal and a third square wave signal are calculated based on the electrical parameter. The second square wave signal and the third square wave signal are sent to the controller 124 and the decider 127 to complete the adjustment of the power supply states of the energy storage battery pack 102 and the super capacitor 103 and the update of the trigger condition of the decider 127.
Preferably, the computation layer 128 may include a target calculator 131, a filter 129, and a control calculator 130. Preferably, in the case of receiving the true value verification result, the target calculator 131 calculates a target value of the total value of the current required to be supplied by the energy storage battery pack 102 and the super capacitor 103 based on the target value of the bus voltage and the local electrical parameter. Preferably, the target calculator 131 divides the target value of the total current required to be supplied by the energy storage battery pack 102 and the super capacitor 103 into the target value of the energy storage battery pack 102 and the target value of the super capacitor 103 through the filter 129. Preferably, in the case of receiving the true value verification result, the control calculator 130 calculates the second square wave signal and the third square wave signal with optimal duty ratios based on the target value of the energy storage battery pack 102, the target value of the super capacitor 103 and the related electrical parameters. Preferably, after the control calculator 130 derives the second square wave signal and the third square wave signal with the optimal duty ratio, the signals are respectively sent to the controller 124 and the decider 127. In response to receipt of the signal, the decider 127 updates the trigger conditions to effect a dynamic response to various changes in the photovoltaic and load within the satellite grid. In response to the signal reception, the controller 124 divides the second square wave signal and the third square wave signal into two parts and then respectively transmits the two parts to the second converter and the third converter, so as to complete the adjustment of the power supply states of the energy storage battery pack 102 and the super capacitor 103, thereby realizing the power balance and ensuring the stable bus voltage.
The present embodiment verifies changes in the satellite network through the trigger layer 125. In the case that the verification result is false, the computation layer 128 does not work on-hook; in the case that the verification result is false, the computation layer 128 does not work on-hook; only under the condition that the verification result is true, the calculation layer 128 generates a new second square wave signal and a new third square wave signal to adjust the power supply states of the energy storage battery pack 102 and the super capacitor 103, so that unnecessary operation and control actions in power management are avoided, and further, the operation resource requirement and the switching loss are reduced.
Example 2
This embodiment is a further improvement of embodiment 1, and repeated details are not repeated.
The present embodiment provides a configuration method of the hybrid power supply system 100. The method at least comprises the following steps: in the case where there is a change in the generated power of the solar power generation module 101 or the electricity usage of the load, the management unit 120 acquires at least an electrical parameter of the power supply system, and controls the operation mode of the power supply system based on the electrical parameter. The electrical parameters include at least the voltage and current values of the energy storage battery pack 102 and/or the super capacitor 103.
The configuration method of the embodiment further comprises the following steps:
acquiring electrical parameters of the power supply system 100;
verifying, by a trigger layer 125, whether the electrical parameter satisfies a trigger condition for changing an operating mode of the power supply system;
in the case that the verification result is false, the computation layer 128 does not work on-hook;
in the case that the verification result is true, the computation layer 128 generates a new second square wave signal and a third square wave signal;
the calculation layer 128 sends the newly generated second square wave signal and third square wave signal to the controller 124 and the determiner 127, respectively;
in response to receipt of the signal, the determiner 127 updates the trigger condition for the next verification; the controller 124 divides the second square wave signal and the third square wave signal into two parts and respectively transmits the two parts to the second converter and the third converter, so as to complete the adjustment of the power supply states of the energy storage battery pack 102 and the super capacitor 103. The configuration method of the hybrid power supply system 100 provided by the embodiment can rapidly and dynamically respond to various changes of photovoltaic and load in the satellite power grid, realize power balance, ensure stable bus voltage, and avoid unnecessary operation and control actions, thereby reducing operation resource requirements and switching loss.
It should be noted that the above-mentioned embodiments are exemplary, and that those skilled in the art, having benefit of the present disclosure, may devise various arrangements that are within the scope of the present disclosure and that fall within the scope of the invention. It should be understood by those skilled in the art that the present specification and figures are illustrative only and are not limiting upon the claims. The scope of the invention is defined by the claims and their equivalents. Throughout this document, the features referred to as "preferably" are only an optional feature and should not be understood as necessarily requiring that such applicant reserves the right to disclaim or delete the associated preferred feature at any time. The present description contains several inventive concepts, such as "preferably", "according to a preferred embodiment" or "optionally", each indicating that the respective paragraph discloses a separate concept, the applicant reserves the right to submit divisional applications according to each inventive concept.
Claims (6)
1. A hybrid power system at least comprises a solar power generation module (101), an energy storage battery pack (102), a super capacitor (103) and a management unit (120),
it is characterized in that the preparation method is characterized in that,
the management unit (120) is configured to: acquiring at least an electrical parameter of the power supply system in case of a change in generated power of the solar power generation module (101) or in electrical power usage of a load, and controlling an operation mode of the power supply system based on the electrical parameter, wherein,
the electrical parameters comprise at least a voltage value and a current value of the energy storage battery pack (102) and/or the super capacitor (103); the solar power generation module (101), the energy storage battery pack (102) and the super capacitor (103) are respectively connected to a power supply bus through a converter, and power is supplied to the load through an output port (104),
the management unit (120) controls the power supply states of the solar power generation module (101), the energy storage battery pack (102) and the super capacitor (103) by controlling the working states of the three converters;
the converter connected with the solar power generation module (101) is a first converter, the converter connected with the energy storage battery pack (102) is a second converter, and the converter connected with the super capacitor (103) is a third converter;
the management unit (120) is further configured to:
constructing a state model describing a power supply system, and collecting electric parameters of the power supply system in the process that the solar power generation module (101) and/or the energy storage battery pack (102) and/or the super capacitor (103) supplies power to the load;
calculating an estimated value of the total value of the current required to be provided by the energy storage battery pack (102) and the super capacitor (103) based on the state model and the electrical parameters; constructing a generation model of square wave signals, and generating a second square wave signal for controlling the working state of the second converter and a third square wave signal for controlling the working state of the third converter according to the estimated value, the electrical parameter and the working mode of the power supply system;
wherein the working modes of the power supply system at least comprise a first mode in which the generated power of the solar power generation module (101) is greater than the electric power of the load, a second mode in which the generated power of the solar power generation module (101) is equal to the electric power of the load, and a third mode in which the generated power of the solar power generation module (101) is less than the electric power of the load.
2. The hybrid power supply system according to claim 1, wherein the management unit (120) comprises at least a photovoltaic signal generator (121), a current monitor (122), a processing module (123) and a controller (124); wherein the content of the first and second substances,
the photovoltaic signal generator (121) generates a first square wave signal for controlling the working state of the first converter by using a maximum power point tracking algorithm for the solar power generation module (101), and sends the first square wave signal to the controller (124), so that the solar power generation module (101) can be powered at the maximum power under different illumination intensities;
the current monitor (122) is used for collecting the electrical parameters of the power supply system and transmitting the collected electrical parameters to the processing module (123);
the processing module (123) is configured to generate the second square wave signal and the third square wave signal, and send the second square wave signal and the third square wave signal to the controller (124);
the controller (124) can control the working state of the converter based on the received square wave signal, and further control the power supply state of the solar power generation module (101) and/or the energy storage battery pack (102) and/or the super capacitor (103).
3. Hybrid power supply system according to claim 2, characterized in that the processing module (123) comprises at least a trigger layer (125) and a computation layer (128),
wherein, in response to receipt of the electrical parameter, the processing module (123) assigns the electrical parameter to the trigger layer (125), the trigger layer (125) selects an operating mode of the power system based on the electrical parameter and verifies whether the electrical parameter satisfies a trigger condition that changes the operating mode of the power system, thereby deciding whether the computing layer (128) updates the second square wave signal and the third square wave signal;
the computing layer (128) is configured to: under the condition that the triggering layer (125) verifies that the electrical parameter meets the triggering condition, receiving the electrical parameter from the triggering layer (125) to calculate target values of the energy storage battery pack (102) and the super capacitor (103), and calculating the second square wave signal and the third square wave signal according to the target values.
4. Hybrid power supply system according to claim 3, characterized in that the trigger layer (125) comprises at least a sampler (126) and a decider (127),
the sampler (126) for storing the electrical parameter transmitted by the current monitor (122) to the processing module (123);
the judger (127) for verifying whether the electrical parameter satisfies the trigger condition;
wherein the content of the first and second substances,
the sampler (126) is configured to: -in case the decider (127) verifies that the result is a true value, transmitting the stored electrical parameter to the calculation layer (128);
the determiner (127) is configured to: -in case the verification is completed, sending a verification result to the computing layer (128) to control an operational state of the computing layer (128).
5. The hybrid power supply system of claim 4, wherein the computing layer (128) is configured to: under the condition that a true value verification result is received, receiving the electrical parameter, and calculating the second square wave signal and the third square wave signal based on the electrical parameter;
wherein the second square wave signal and the third square wave signal are sent to the controller (124) and the determiner (127) to complete the adjustment of the power supply states of the energy storage battery pack (102) and the super capacitor (103) and the update of the trigger condition of the determiner (127).
6. A method for configuring a hybrid power system, the method comprising at least:
in case of a change in the generated power of the solar power generation module (101) or the electricity usage of the load, the management unit (120) acquires at least an electrical parameter of the power supply system and controls the operation mode of the power supply system based on the electrical parameter, wherein,
the electrical parameters at least comprise voltage values and current values of the energy storage battery pack (102) and/or the super capacitor (103);
the solar power generation module (101), the energy storage battery pack (102) and the super capacitor (103) are respectively connected to a power supply bus through a converter, and power is supplied to the load through an output port (104),
the management unit (120) controls the working states of the three converters to further control the power supply states of the solar power generation module (101), the energy storage battery pack (102) and the super capacitor (103);
the converter connected with the solar power generation module (101) is a first converter, the converter connected with the energy storage battery pack (102) is a second converter, and the converter connected with the super capacitor (103) is a third converter;
the management unit (120) is further configured to:
constructing a state model describing a power supply system, and collecting electric parameters of the power supply system in the process that the solar power generation module (101) and/or the energy storage battery pack (102) and/or the super capacitor (103) supplies power to the load;
calculating an estimated value of the total value of the current required to be provided by the energy storage battery pack (102) and the super capacitor (103) based on the state model and the electrical parameters;
constructing a generation model of the square wave signal, and generating a second square wave signal for controlling the working state of the second converter and a third square wave signal for controlling the working state of the third converter according to the estimated value, the electrical parameter and the working mode of the power supply system;
wherein the working modes of the power supply system at least comprise a first mode in which the generated power of the solar power generation module (101) is greater than the electric power of the load, a second mode in which the generated power of the solar power generation module (101) is equal to the electric power of the load, and a third mode in which the generated power of the solar power generation module (101) is less than the electric power of the load.
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