CN104393644A - Energy storage system voltage balance control method and system and voltage balance modules - Google Patents
Energy storage system voltage balance control method and system and voltage balance modules Download PDFInfo
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- CN104393644A CN104393644A CN201410704771.9A CN201410704771A CN104393644A CN 104393644 A CN104393644 A CN 104393644A CN 201410704771 A CN201410704771 A CN 201410704771A CN 104393644 A CN104393644 A CN 104393644A
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Abstract
The invention discloses an energy storage system voltage balance control method and system and voltage balance modules. The voltage balance modules are connected to a communication network of an energy storage system, respectively send the self-configuration-state information to the communication network in a data message form, then receive data messages sent from other voltage balance modules, control charging and discharging of integral voltage of self-modules by analyzing information contained in the received data messages and achieve voltage balance control between the modules. The voltage balance modules achieve the voltage balance between the modules through the received data messages, so that only the voltage balance modules are connected to the communication network, when the energy storage system requires to increase or reduce the number of the voltage balance modules, the number of the data messages received by the voltage balance modules is correspondingly changed, and then the voltage balance control between the modules can be achieved by analyzing the information contained in the received data messages.
Description
Technical field
The present invention relates to voltage balance control technical field, in particular, relate to a kind of control method of energy-storage system electric voltage equalization, system and electric voltage equalization module.
Background technology
At present, the energy-storage system be composed in series by ultracapacitor, when the supercapacitors of connecting is less, is generally connected each ultracapacitor with voltage balance control device, is then realized the electric voltage equalization of each ultracapacitor by voltage balance control device.When the quantity of ultracapacitor of connecting is more, the composition scale due to ultracapacitor series connection becomes large, wiring is more complicated, therefore relies on single voltage balancing device to realize the electric voltage equalization process of each ultracapacitor also more complicated.
For the energy-storage system that the ultracapacitor by a greater number is composed in series, the modular ultracapacitor voltage balancer of many employings at present, i.e. electric voltage equalization module.The ultracapacitor that electric voltage equalization module is connected by 8 roads forms with the voltage balance circuit of the ultracapacitor being connected 8 tunnel series connection, is responsible for the realization of the electric voltage equalization of the ultracapacitor that self controls.Because each electric voltage equalization module cannot realize the electric voltage equalization between module, therefore, each electric voltage equalization module need be connected with a central control device, control the electric voltage equalization between module by central control device.
But, central control device can only realize the electric voltage equalization of the electric voltage equalization module of specific quantity, when energy-storage system needs the quantity increasing or reduce electric voltage equalization module, just need to redesign whole energy-storage system, controling parameters in change central control device, thus cause whole control procedure loaded down with trivial details and lose time.Therefore, how when the quantity of electric voltage equalization module changes, reduce the troublesome operation of control procedure, saving time is those skilled in the art's technical problems urgently to be resolved hurrily.
Summary of the invention
In view of this, the invention provides a kind of control method of energy-storage system electric voltage equalization, system and electric voltage equalization module, to realize when the quantity of electric voltage equalization module changes, reduce the troublesome operation of control procedure, save time.
A control method for energy-storage system electric voltage equalization, energy-storage system comprises multiple electric voltage equalization module, and each described electric voltage equalization module is connected in the communication network of described energy-storage system, and described control method is applied to each described electric voltage equalization module, comprises step:
Obtain self identify label number, global voltage and current operating state;
Described identify label number, described global voltage and described current operating state are generated data message;
Described data message is sent to described communication network;
Receive and be connected to the data message that on described communication network, other described electric voltage equalization module sends in preset time period;
According to the size of the identify label number comprised in each data message received, the information comprised in each described data message is stored according to preset order;
The state of the electric voltage equalization module corresponding with the described data message received is set to state of activation;
Whether the described current operating state judging self is upstate;
If described current operating state is upstate, then obtain the global voltage of the balanced module of all effective voltage, the balanced module of described effective voltage is be in state of activation and operating state is in the electric voltage equalization module of upstate;
Ask for the average voltage of the described global voltage of self and the global voltage of the balanced module of all described effective voltages, and the maximum differential pressure between the balanced module of each described effective voltage;
Judge described average voltage whether between module the working voltage of voltage balance control interval;
If described average voltage is interval at described working voltage, then judge whether described maximum differential pressure is greater than maximum permissible pressure between module;
If described maximum differential pressure is greater than described maximum permissible pressure, then uses maximum variance between clusters that the global voltage exceeding threshold voltage is classified as high voltage class, the global voltage being no more than described threshold voltage is classified as low voltage class;
Choose with the voltage type that self mates as balanced object;
Size according to the described global voltage of self judges self whether in described balanced object range;
If in described balanced object range, then adopt the formula corresponding with described voltage type, ask for charging interval or discharge time, and open self charge function or discharging function;
If not in described balanced object range, then the charge function of self or discharging function is kept to close.
Preferably, choose described in and comprise as balanced object with the voltage type that self mates:
Judge that self having charge function still has discharging function;
If self has charge function, then using described low voltage class as balanced object;
If self has discharging function, then using described high voltage class as balanced object.
Preferably, when using described low voltage class as balanced object time, the formula corresponding with charge function is: charging interval=(average voltage-self global voltage of high voltage class)/self overall charge rate.
Preferably, described the deterministic process of described high voltage class as balanced object to be comprised:
Judge whether the module quantity of described high voltage class is greater than the maximum permission of same time and runs module quantity;
If the module quantity in described high voltage class is greater than the maximum permission of described same time run module quantity, then choose global voltage in described high voltage class bigger than normal and with the maximum balanced object of the balanced module of effective voltage as voltage balance control between this module allowing to run the quantity such as module quantity;
If the module quantity in described high voltage class is not more than the maximum permission of described same time run module quantity, then using the balanced object of balanced for described effective voltages all in described high voltage class module as voltage balance control between this module.
Preferably, when using described high voltage class as balanced object time, the formula corresponding with discharging function is: discharge time=(average voltage of self global voltage-low voltage class)/self overall discharge rate.
A control system for energy-storage system electric voltage equalization, energy-storage system comprises multiple electric voltage equalization module, and each described electric voltage equalization module is connected in the communication network of described energy-storage system, and described control system, in each described electric voltage equalization module, comprising:
First acquiring unit, for obtaining self identify label number, global voltage and current operating state;
Generation unit, for generating data message by described identify label number, described global voltage and described current operating state;
Transmitting element, for being sent to described communication network by described data message;
Receiving element, is connected to for receiving the data message that on described communication network, other described electric voltage equalization module sends in preset time period;
Memory cell, for the size according to the identify label number comprised in each data message received, stores the information comprised in each described data message according to preset order;
Setting unit, for being set to state of activation by the state of the electric voltage equalization module corresponding with the described data message received;
Whether the first judging unit is upstate for the described current operating state judging self;
Second acquisition unit, if be upstate for described current operating state, then obtains the global voltage of the balanced module of all effective voltage, and the balanced module of described effective voltage is be in state of activation and operating state is in the electric voltage equalization module of upstate;
First asks for unit, for the average voltage of the global voltage of the described global voltage and the balanced module of all described effective voltages of asking for self, and the maximum differential pressure between the balanced module of each described effective voltage;
Second judging unit, for judge described average voltage whether between module the working voltage of voltage balance control interval;
3rd judging unit, if interval at described working voltage for described average voltage, then judges whether described maximum differential pressure is greater than maximum permissible pressure between module;
Sort out unit, if be greater than described maximum permissible pressure for described maximum differential pressure, then use maximum variance between clusters that the global voltage exceeding threshold voltage is classified as high voltage class, the global voltage being no more than described threshold voltage is classified as low voltage class;
Choose unit, for choosing with the voltage type that self mates as balanced object;
4th judging unit, for judging self whether in described balanced object range according to the size of the described global voltage of self;
Second asks for unit, if in described balanced object range, then adopts the formula corresponding with described voltage type, asks for charging interval or discharge time, and and open self charge function or discharging function;
Holding unit, if for not in described balanced object range, then keeps the charge function of self or discharging function to close.
Preferably, choose unit described in comprise:
First judgment sub-unit, for judging that self having charge function still has discharging function;
First chooses subelement, if there is charge function for self, then using described low voltage class as balanced object;
Second chooses subelement, if there is discharging function for self, then using described high voltage class as balanced object.
Preferably, when using described low voltage class as balanced object time, ask in unit described second, the formula corresponding with charge function is: charging interval=(average voltage-self global voltage of high voltage class)/self overall charge rate.
Preferably, described second choose subelement and comprise:
Second judgment sub-unit, for judging whether the module quantity of described high voltage class is greater than the maximum permission of same time and runs module quantity;
3rd chooses subelement, if be greater than the maximum permission of described same time for the module quantity in described high voltage class to run module quantity, then choose global voltage in described high voltage class bigger than normal and with the maximum balanced object of the balanced module of effective voltage as voltage balance control between this module allowing to run the quantity such as module quantity;
4th chooses subelement, if be not more than the maximum permission of described same time for the module quantity in described high voltage class to run module quantity, then using the balanced object of balanced for described effective voltages all in described high voltage class module as voltage balance control between this module.
Preferably, when using described high voltage class as balanced object time, ask in unit described second, the formula corresponding with described discharging function is: discharge time=(average voltage of self global voltage-low voltage class)/self overall discharge rate.
A kind of electric voltage equalization module, comprises the control system of the energy-storage system electric voltage equalization described in above-mentioned any one.
As can be seen from above-mentioned technical scheme, the invention provides a kind of control method of energy-storage system electric voltage equalization, system and electric voltage equalization module, each electric voltage equalization module is connected in the communication network of energy-storage system, the configuration status information of self is sent to communication network with data message form by each electric voltage equalization module, then the data message that other electric voltage equalization module sends is received, and the state of the electric voltage equalization module corresponding with the data message received is set to state of activation, the information comprised in the data message received by analysis, control the discharge and recharge of self module global voltage, realize the voltage balance control between module.Because each electric voltage equalization module is the electric voltage equalization utilizing the data message that receives to realize between module, therefore, only each electric voltage equalization module need be connected to communication network, when energy-storage system needs the quantity increasing or reduce electric voltage equalization module, the quantity of the data message that each electric voltage equalization module receives also can respective change, therefore, the information comprised in the data message received by analysis, can realize the voltage balance control between module.The application compared to existing technologies, each electric voltage equalization module is transferred to by voltage balance control between module to control, thus eliminate central control device, and then decrease owing to redesigning whole energy-storage system, the controling parameters in change central control device and the control procedure that causes is loaded down with trivial details, the problem of time waste.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
The structural representation of Fig. 1 a kind of energy-storage system disclosed in the embodiment of the present invention;
The control method flow chart of Fig. 2 a kind of energy-storage system electric voltage equalization disclosed in the embodiment of the present invention;
Fig. 3 is a kind of using the deterministic process flow chart of high voltage class as balanced object disclosed in the embodiment of the present invention;
The structural representation of Fig. 4 a kind of control system of energy-storage system electric voltage equalization disclosed in the embodiment of the present invention;
Fig. 5 is a kind of second structural representation choosing subelement disclosed in the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the invention discloses a kind of control method of energy-storage system electric voltage equalization, system and electric voltage equalization module, to realize when the quantity of electric voltage equalization module changes, reduce the troublesome operation of control procedure, save time.
See Fig. 1, the embodiment of the invention discloses a kind of structural representation of energy-storage system, energy-storage system comprises multiple electric voltage equalization module 01, and each electric voltage equalization module 01 is connected in the communication network 02 of energy-storage system.
Wherein, communication network 02 is specifically as follows CAN (Controller Area Network, controller local area network) communication network, or Ethernet, or the network such as RS485.
See Fig. 2, the embodiment of the invention discloses a kind of control method flow chart of energy-storage system electric voltage equalization, this control method is applied to each electric voltage equalization module 01 in embodiment disclosed in Fig. 1, comprises step:
Step S11, obtain self identify label number, global voltage and current operating state;
Wherein, identify label number (Identity, ID) is obtained by the toggle switch arranged in electric voltage equalization module 01.
The current operating state of electric voltage equalization module 01 comprises current upstate and current down state.
Step S12, by described identify label number, described global voltage and described current operating state generate data message;
Step S13, described data message is sent to described communication network;
Step S14, reception are connected to the data message that on described communication network, other described electric voltage equalization module 01 sends in preset time period;
Wherein, preset time period is determined, such as 1s according to actual needs, and the present invention does not limit.
Each electric voltage equalization module 01 all can receive the data message of other electric voltage equalization module 01 transmission every preset time period.
Step S15, size according to the identify label number comprised in each data message received, store the information comprised in each described data message according to preset order;
Include the coding of electric voltage equalization module 01 in identify label number, the information comprised can be stored successively according to preset order according to this coding size in data message.
Preset order can be according to the descending sequence of coding size, or ascending sequence.
Step S16, the state of the electric voltage equalization module 01 corresponding with the described data message received is set to state of activation;
Be understandable that, if receive the data message that certain electric voltage equalization module 01 sends, then show this electric voltage equalization module 01 be current to be in state of activation, for realizing the mark to other each electric voltage equalization module 01 current state, the state of the electric voltage equalization module 01 corresponding with the data message received is set to state of activation.Meanwhile, also the state of the electric voltage equalization module 01 not receiving its data message can be set to unactivated state.
Whether step S17, the described current operating state judging self are upstate, if so, then perform step S18;
Step S18, obtain the global voltage of the balanced module of all effective voltage;
Wherein, the balanced module of effective voltage is be in state of activation and operating state is in the electric voltage equalization module of upstate.
Step S19, ask for the average voltage of the described global voltage of self and the global voltage of the balanced module of all described effective voltages and the maximum differential pressure between the balanced module of each described effective voltage;
Wherein, pressure reduction refers to the pressure reduction between the balanced module of any two effective voltages, and maximum differential pressure is in all pressure reduction, the pressure reduction that pressure difference is maximum.
Step S20, judge described average voltage whether between module the working voltage of voltage balance control interval, if so, then perform step S21;
Step S21, judge whether described maximum differential pressure is greater than maximum permissible pressure between module, if so, then perform step S22;
The global voltage exceeding threshold voltage is classified as high voltage class by step S22, use maximum variance between clusters, and the global voltage being no more than described threshold voltage is classified as low voltage class;
Wherein, maximum variance between clusters is proposed in 1979 by the large Tianjin of Japanese scholars (Nobuyuki Otsu), is a kind of method that adaptive threshold value is determined, is again large law, is called for short OTSU.It is the gamma characteristic by image, image is divided into background and target 2 part.Inter-class variance between background and target is larger, illustrates that the difference of 2 parts of composing images is larger, when partial target mistake is divided into background or part background mistake to be divided into target that 2 part difference all can be caused to diminish.Therefore, the segmentation making inter-class variance maximum means that misclassification probability is minimum.
The size of threshold voltage is determined according to actual needs.
Step S23, to choose with the voltage type that self mates as balanced object;
Concrete, voltage type herein specifically refers to charge function and discharging function.
When self has charge function, using low voltage class as balanced object; When self has discharging function, using high voltage class as balanced object.
Step S24, judge self whether in described balanced object range according to the size of the described global voltage of self, if so, then perform step S25, otherwise, perform step S26;
Step S25, adopt the formula corresponding with described voltage type, ask for charging interval or discharge time, and open self charge function or discharging function;
Step S26, self charge function or discharging function is kept to close.
It should be noted that, every preset time period, the electric voltage equalization module 01 be selected all can obtain the data message that other electric voltage equalization module 01 sends again, to the analyzing and processing of data message with step 15-step S26.
In summary it can be seen, the electric voltage equalization that in the application, each electric voltage equalization module 01 utilizes the data message received to realize between module, therefore, only each electric voltage equalization module 01 need be connected to communication network 02, when energy-storage system needs the quantity increasing or reduce electric voltage equalization module 01, the quantity of the data message that each electric voltage equalization module 01 receives also can respective change, therefore, the information comprised in the data message received by analysis, can realize the voltage balance control between module.The application compared to existing technologies, each electric voltage equalization module 01 is transferred to by voltage balance control between module to control, thus eliminate central control device, and then decrease owing to redesigning whole energy-storage system, the controling parameters in change central control device and the control procedure that causes is loaded down with trivial details, the problem of time waste.
Secondly, the application also effectively prevent because central control device cannot normally work, and causes the voltage balancing function between whole energy-storage system module to lose efficacy and the serious consequence brought.
Finally, for the energy-storage system that the ultracapacitor by a greater number is composed in series, because the voltage balance control between module transfers to each electric voltage equalization module 01 to control by the application, therefore, need electric voltage equalization module 01 and central control device jointly to realize compared to existing technology, the application achieves by single voltage balance control device the control of electric voltage equalization.
It should be noted that, in the above-described embodiments, if judge in step S20 average voltage not between module the working voltage of voltage balance control interval, or maximum differential pressure is not more than maximum permissible pressure between module, then return and re-execute step S17.
Concrete, when using low voltage class as balanced object time, open the overall charge function of the electric voltage equalization module 01 chosen, in step s 25, corresponding with charge function formula is: charging interval=(average voltage-self global voltage of high voltage class)/self overall charge rate.
When using high voltage class as balanced object time, open the overall discharging function of the electric voltage equalization module 01 chosen, in step s 25, corresponding with discharging function formula is: discharge time=(average voltage of self global voltage-low voltage class)/self overall discharge rate.
See Fig. 3, a kind of using the deterministic process flow chart of high voltage class as balanced object disclosed in the embodiment of the present invention, comprising:
Step S31, judge whether the module quantity of high voltage class is greater than the maximum permission of same time and runs module quantity, if so, then performs step S32, otherwise, perform step S33;
Step S32, choose global voltage in described high voltage class bigger than normal and with the maximum balanced object of the balanced module of effective voltage as voltage balance control between this module allowing to run the quantity such as module quantity;
Step S33, using the balanced object of the balanced module of described effective voltages all in described high voltage class as voltage balance control between this module.
Illustrate, supposing that the maximum permission of same time runs module quantity is M, and the module quantity in high voltage class is that N, M and N are positive integer;
As N > M, can the descending sequence by the global voltage in high voltage class, then choose the balanced object of the balanced module of M effective voltage as voltage balance control between this module according to descending order;
As N≤M, then using the balanced object of balanced for effective voltages all in high voltage class module as voltage balance control between this module.
Corresponding with said method embodiment, present invention also offers a kind of control system of energy-storage system electric voltage equalization.
See Fig. 4, a kind of structural representation of control system of energy-storage system electric voltage equalization disclosed in the embodiment of the present invention, this control system is each electric voltage equalization module 01 in embodiment disclosed in Fig. 1, comprising:
First acquiring unit 41, for obtaining self identify label number, global voltage and current operating state;
Wherein, identify label number (Identity, ID) is obtained by the toggle switch arranged in electric voltage equalization module 01.
The current operating state of electric voltage equalization module 01 comprises current upstate and current down state.
Generation unit 42, for generating data message by described identify label number, described global voltage and described current operating state;
Transmitting element 43, for being sent to described communication network by described data message;
Receiving element 44, is connected to for receiving the data message that on described communication network, other described electric voltage equalization module sends in preset time period;
Wherein, preset time period is determined, such as 1s according to actual needs, and the present invention does not limit.
Each electric voltage equalization module 01 all can receive the data message of other electric voltage equalization module 01 transmission every preset time period.
Memory cell 45, for the size according to the identify label number comprised in each data message received, stores the information comprised in each described data message according to preset order;
Include the coding of electric voltage equalization module 01 in identify label number, the information comprised can be stored successively according to preset order according to this coding size in data message.
Preset order can be according to the descending sequence of coding size, or ascending sequence.
Setting unit 46, for being set to state of activation by the state of the electric voltage equalization module corresponding with the described data message received;
Whether the first judging unit 47 is upstate for the described current operating state judging self, if so, then performs second acquisition unit 48;
Second acquisition unit 48, if be upstate for described current operating state, then obtains the global voltage of the balanced module of all effective voltages;
The balanced module of described effective voltage is be in state of activation and operating state is in the electric voltage equalization module of upstate.
First asks for unit 49, for the average voltage of the global voltage of the described global voltage and the balanced module of all described effective voltages of asking for self, and the maximum differential pressure between the balanced module of each described effective voltage;
Second judging unit 50, for judge described average voltage whether between module the working voltage of voltage balance control interval, if so, then perform the 3rd judging unit 51;
3rd judging unit 51, if interval at described working voltage for described average voltage, then judges whether described maximum differential pressure is greater than maximum permissible pressure between module;
Sort out unit 52, if be greater than described maximum permissible pressure for described maximum differential pressure, then use maximum variance between clusters that the global voltage exceeding threshold voltage is classified as high voltage class, the global voltage being no more than described threshold voltage is classified as low voltage class;
Choose unit 53, for choosing with the voltage type that self mates as balanced object;
Concrete, voltage type herein specifically refers to charge function and discharging function.
When self has charge function, using low voltage class as balanced object; When self has discharging function, using high voltage class as balanced object.
4th judging unit 54, for judging self according to the size of the described global voltage of self whether in described balanced object range, if so, then performs second and asks for unit 55, otherwise, perform holding unit 56;
Second asks for unit 55, if in described balanced object range, then adopts the formula corresponding with described voltage type, asks for charging interval or discharge time, and open self charge function or discharging function;
Holding unit 56, if for not in described balanced object range, then keeps the charge function of self or discharging function to close.
In summary it can be seen, the electric voltage equalization that in the application, each electric voltage equalization module 01 utilizes the data message received to realize between module, therefore, only each electric voltage equalization module 01 need be connected to communication network 02, when energy-storage system needs the quantity increasing or reduce electric voltage equalization module 01, the quantity of the data message that each electric voltage equalization module 01 receives also can respective change, therefore, the information comprised in the data message received by analysis, can realize the voltage balance control between module.The application compared to existing technologies, each electric voltage equalization module 01 is transferred to by voltage balance control between module to control, thus eliminate central control device, and then decrease owing to redesigning whole energy-storage system, the controling parameters in change central control device and the control procedure that causes is loaded down with trivial details, the problem of time waste.
Secondly, the application also effectively prevent because central control device cannot normally work, and causes the voltage balancing function between whole energy-storage system module to lose efficacy and the serious consequence brought.
Finally, for the energy-storage system that the ultracapacitor by a greater number is composed in series, because the voltage balance control between module transfers to each electric voltage equalization module 01 to control by the application, therefore, need electric voltage equalization module 01 and central control device jointly to realize compared to existing technology, the application achieves by single voltage balance control device the control of electric voltage equalization.
It should be noted that, in the above-described embodiments, if the second judging unit 50 judge average voltage not between module the working voltage of voltage balance control interval, or the 3rd judging unit 51 judge that maximum differential pressure is not more than maximum permissible pressure between module, then return and re-execute the first judging unit 47.
In above-described embodiment, choose unit 53 and specifically comprise: the first judgment sub-unit, first is chosen subelement and second and chosen subelement.
Wherein, the first judgment sub-unit, for judging that self having charge function still has discharging function;
First chooses subelement, if there is charge function for self, then using described low voltage class as balanced object;
Second chooses subelement, if there is discharging function for self, then using described high voltage class as balanced object.
When using low voltage class as balanced object time, open the overall charge function of the electric voltage equalization module 01 chosen, ask in unit 55 second, the formula corresponding with charge function is: charging interval=(average voltage-self global voltage of high voltage class)/self overall charge rate.
When using high voltage class as balanced object time, open the overall discharging function of the electric voltage equalization module 01 chosen, ask in unit 55 second, the formula corresponding with discharging function is: discharge time=(average voltage of self global voltage-low voltage class)/self overall discharge rate.
See Fig. 5, a kind of second structural representation choosing subelement disclosed in the embodiment of the present invention, comprising:
Second judgment sub-unit 61, for judging whether the module quantity in described high voltage class is greater than maximum permission operation of same time module quantity, if so, then performs the 3rd and chooses subelement 62, otherwise, perform the 4th and choose subelement 63;
3rd chooses subelement 62, if the module quantity for described high voltage class is greater than the maximum permission of described same time run module quantity, then choose global voltage in described high voltage class bigger than normal and with the maximum balanced object of the balanced module of effective voltage as voltage balance control between this module allowing to run the quantity such as module quantity;
4th chooses subelement 63, if be not more than the maximum permission of described same time for the module quantity in described high voltage class to run module quantity, then using the balanced object of balanced for described effective voltages all in described high voltage class module as voltage balance control between this module.
Illustrate, supposing that the maximum permission of same time runs module quantity is M, and the module quantity in high voltage class is that N, M and N are positive integer;
As N > M, can the descending sequence by the global voltage in high voltage class, then choose the balanced object of the balanced module of M effective voltage as voltage balance control between this module according to descending order;
As N≤M, then using the balanced object of balanced for effective voltages all in high voltage class module as voltage balance control between this module.
Present invention also offers a kind of electric voltage equalization module, this electric voltage equalization module comprises the control system of the energy-storage system electric voltage equalization that above-described embodiment is discussed, wherein, the operation principle relating to control system part in electric voltage equalization module see above-mentioned control system embodiment, can repeat no more herein.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (11)
1. the control method of an energy-storage system electric voltage equalization, it is characterized in that, energy-storage system comprises multiple electric voltage equalization module, and each described electric voltage equalization module is connected in the communication network of described energy-storage system, described control method is applied to each described electric voltage equalization module, comprises step:
Obtain self identify label number, global voltage and current operating state;
Described identify label number, described global voltage and described current operating state are generated data message;
Described data message is sent to described communication network;
Receive and be connected to the data message that on described communication network, other described electric voltage equalization module sends in preset time period;
According to the size of the identify label number comprised in each data message received, the information comprised in each described data message is stored according to preset order;
The state of the electric voltage equalization module corresponding with the described data message received is set to state of activation;
Whether the described current operating state judging self is upstate;
If described current operating state is upstate, then obtain the global voltage of the balanced module of all effective voltage, the balanced module of described effective voltage is be in state of activation and operating state is in the electric voltage equalization module of upstate;
Ask for the average voltage of the described global voltage of self and the global voltage of the balanced module of all described effective voltages, and the maximum differential pressure between the balanced module of each described effective voltage;
Judge described average voltage whether between module the working voltage of voltage balance control interval;
If described average voltage is interval at described working voltage, then judge whether described maximum differential pressure is greater than maximum permissible pressure between module;
If described maximum differential pressure is greater than described maximum permissible pressure, then uses maximum variance between clusters that the global voltage exceeding threshold voltage is classified as high voltage class, the global voltage being no more than described threshold voltage is classified as low voltage class;
Choose with the voltage type that self mates as balanced object;
Size according to the described global voltage of self judges self whether in described balanced object range;
If in described balanced object range, then adopt the formula corresponding with described voltage type, ask for charging interval or discharge time, and open self charge function or discharging function;
If not in described balanced object range, then the charge function of self or discharging function is kept to close.
2. control method according to claim 1, is characterized in that, described in choose and comprise as balanced object with the voltage type that self mates:
Judge that self having charge function still has discharging function;
If self has charge function, then using described low voltage class as balanced object;
If self has discharging function, then using described high voltage class as balanced object.
3. control method according to claim 2, it is characterized in that, when using described low voltage class as balanced object time, the formula corresponding with charge function is: charging interval=(average voltage-self global voltage of high voltage class)/self overall charge rate.
4. control method according to claim 2, is characterized in that, describedly the deterministic process of described high voltage class as balanced object is comprised:
Judge whether the module quantity of described high voltage class is greater than the maximum permission of same time and runs module quantity;
If the module quantity in described high voltage class is greater than the maximum permission of described same time run module quantity, then choose global voltage in described high voltage class bigger than normal and with the maximum balanced object of the balanced module of effective voltage as voltage balance control between this module allowing to run the quantity such as module quantity;
If the module quantity in described high voltage class is not more than the maximum permission of described same time run module quantity, then using the balanced object of balanced for described effective voltages all in described high voltage class module as voltage balance control between this module.
5. control method according to claim 2, it is characterized in that, when using described high voltage class as balanced object time, the formula corresponding with discharging function is: discharge time=(average voltage of self global voltage-low voltage class)/self overall discharge rate.
6. the control system of an energy-storage system electric voltage equalization, it is characterized in that, energy-storage system comprises multiple electric voltage equalization module, and each described electric voltage equalization module is connected in the communication network of described energy-storage system, described control system, in each described electric voltage equalization module, comprising:
First acquiring unit, for obtaining self identify label number, global voltage and current operating state;
Generation unit, for generating data message by described identify label number, described global voltage and described current operating state;
Transmitting element, for being sent to described communication network by described data message;
Receiving element, is connected to for receiving the data message that on described communication network, other described electric voltage equalization module sends in preset time period;
Memory cell, for the size according to the identify label number comprised in each data message received, stores the information comprised in each described data message according to preset order;
Setting unit, for being set to state of activation by the state of the electric voltage equalization module corresponding with the described data message received;
Whether the first judging unit is upstate for the described current operating state judging self;
Second acquisition unit, if be upstate for described current operating state, then obtains the global voltage of the balanced module of all effective voltage, and the balanced module of described effective voltage is be in state of activation and operating state is in the electric voltage equalization module of upstate;
First asks for unit, for the average voltage of the global voltage of the described global voltage and the balanced module of all described effective voltages of asking for self, and the maximum differential pressure between the balanced module of each described effective voltage;
Second judging unit, for judge described average voltage whether between module the working voltage of voltage balance control interval;
3rd judging unit, if interval at described working voltage for described average voltage, then judges whether described maximum differential pressure is greater than maximum permissible pressure between module;
Sort out unit, if be greater than described maximum permissible pressure for described maximum differential pressure, then use maximum variance between clusters that the global voltage exceeding threshold voltage is classified as high voltage class, the global voltage being no more than described threshold voltage is classified as low voltage class;
Choose unit, for choosing with the voltage type that self mates as balanced object;
4th judging unit, for judging self whether in described balanced object range according to the size of the described global voltage of self;
Second asks for unit, if in described balanced object range, then adopts the formula corresponding with described voltage type, asks for charging interval or discharge time, and open self charge function or discharging function;
Holding unit, if for not in described balanced object range, then keeps the charge function of self or discharging function to close.
7. control system according to claim 6, is characterized in that, described in choose unit and comprise:
First judgment sub-unit, for judging that self having charge function still has discharging function;
First chooses subelement, if there is charge function for self, then using described low voltage class as balanced object;
Second chooses subelement, if there is discharging function for self, then using described high voltage class as balanced object.
8. control system according to claim 7, it is characterized in that, when using described low voltage class as balanced object time, ask in unit described second, the formula corresponding with charge function is: charging interval=(average voltage-self global voltage of high voltage class)/self overall charge rate.
9. control system according to claim 7, is characterized in that, described second chooses subelement comprises:
Second judgment sub-unit, for judging whether the module quantity of described high voltage class is greater than the maximum permission of same time and runs module quantity;
3rd chooses subelement, if be greater than the maximum permission of described same time for the module quantity in described high voltage class to run module quantity, then choose global voltage in described high voltage class bigger than normal and with the maximum balanced object of the balanced module of effective voltage as voltage balance control between this module allowing to run the quantity such as module quantity;
4th chooses subelement, if be not more than the maximum permission of described same time for the module quantity in described high voltage class to run module quantity, then using the balanced object of balanced for described effective voltages all in described high voltage class module as voltage balance control between this module.
10. control system according to claim 7, it is characterized in that, when using described high voltage class as balanced object time, ask in unit described second, the formula corresponding with described discharging function is: discharge time=(average voltage of self global voltage-low voltage class)/self overall discharge rate.
11. 1 kinds of electric voltage equalization modules, is characterized in that, comprise the control system of the energy-storage system electric voltage equalization described in claim 6 to 10 any one.
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