CN115995885B - Automatic test method for full-load operation of serial energy storage system - Google Patents
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Abstract
The invention discloses a full-load operation automatic test method of a group string type energy storage system, which comprises the following steps: dividing the systems after the system specification setting is completed into a plurality of groups, wherein each group comprises two subsystems, analyzing each group of systems through collected operation condition information, and acquiring a system state analysis report; when each group is determined to have operation conditions according to the system state analysis report, the user sets the operation content of the system, and the system enters an automatic operation state according to the setting; in the automatic operation state process, the system acquires operation condition information in real time, analyzes the operation condition of the system in real time, and maintains or automatically adjusts the operation mode according to the current operation condition. By fully running the subsystems, the stability of the system can be tested, and in the continuous test, the aging verification of the system is also completed. In addition, by using the method, simultaneous testing of a plurality of systems can be realized without being limited by the load requirements of factories.
Description
Technical Field
The invention relates to the technical field of energy storage, in particular to an automatic test method for full-load operation of a serial energy storage system.
Background
With the rapid development of the energy storage industry, more and more enterprises are put into the industry, and more energy storage products are put into the market. The current energy storage systems are various, and the serial energy storage systems, as a cluster-management system, have a series of advantages of higher discharge, better investment, high Jian Yunwei, safety and reliability and the like, and are thermally touted by the market.
The more and more energy storage orders and delivery requirements bring great challenges to the system test of an energy storage integrated manufacturer, and on one hand, more professionals are needed for the fine test to ensure the safety and reliability of the system; on the other hand, when the energy storage system is used as high-power charge-discharge equipment and is in full load test, huge impact is brought to a factory incoming line transformer, overload risk exists during charging, the transformer is damaged, countercurrent risk exists during discharging, penalty is faced, and meanwhile, when a plurality of energy storage systems are in joint adjustment, the problem of factory power dispatching and distribution is faced, so that the invention provides an automatic full load operation test method for the series-type energy storage system.
Disclosure of Invention
The invention provides an automatic test method for full-load operation of a serial energy storage system, which aims to solve the problems caused by the fact that more and more enterprises are put into the industry and more energy storage products are put into the market along with the rapid development of the energy storage industry. The current energy storage systems are various, and the serial energy storage systems, as a cluster-management system, have a series of advantages of higher discharge, better investment, high Jian Yunwei, safety and reliability and the like, and are thermally touted by the market. The more and more energy storage orders and delivery requirements bring great challenges to the system test of an energy storage integrated manufacturer, and on one hand, more professionals are needed for the fine test to ensure the safety and reliability of the system; on the other hand, when the energy storage system is used as high-power charge-discharge equipment and is in full load test, huge impact is brought to a factory incoming line transformer, overload risk exists during charging, the transformer is damaged, countercurrent risk exists during discharging, fine is faced, and meanwhile, when a plurality of energy storage systems are in joint adjustment, the problem of factory power dispatching and distribution is faced, so that the invention provides the problem of the automatic full load operation test method of the serial energy storage system.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a full-load operation automatic test method for a group string type energy storage system comprises the following steps:
s101: dividing the systems after the system specification setting is completed into a plurality of groups, wherein each group comprises two subsystems, analyzing each group of systems through collected operation condition information, and acquiring a system state analysis report;
s102: when each group is determined to have operation conditions according to the system state analysis report, the user sets the operation content of the system, and the system enters an automatic operation state according to the setting;
s103: in the automatic operation state process, the system acquires operation condition information in real time, analyzes the operation condition of the system in real time, and maintains or automatically adjusts the operation mode according to the current operation condition.
Wherein, the step S101 includes:
s1011: setting control words and related parameters according to the specification of the serial energy storage system;
s1012: dividing the group string type energy storage system into a plurality of groups, wherein each group comprises two group string type subsystems;
s1013: and acquiring operation condition information of corresponding equipment, wherein the corresponding equipment comprises a battery management system BMS and an energy storage bidirectional converter PCS, and analyzing the systems of each group to acquire the states of the systems of each group.
Wherein, the step S102 includes:
s1021: judging whether each group of systems has operation conditions according to the states of each group of systems, and if the judging result is that a certain group of systems does not have the operation conditions, resetting according to the system specification;
s1022: if the judging result is that each group of systems has the operation condition, each group of systems is ready;
s1023: after each group of systems are ready, the user sets the operation content of the systems to be automatic operation, clicks a start button, and the systems enter an automatic operation state.
Wherein, the step S103 includes:
s1031: in the automatic running state process of the system, running condition information of the BMS and the PCS is collected in real time, the running condition of the system is analyzed in real time, and an analysis report of the corresponding condition is obtained, wherein the running condition information comprises a system ready state and a system fault state;
s1032: determining a current operation condition according to the analysis report of the corresponding condition, judging the current system operation mode according to the operation condition, and maintaining or automatically adjusting the operation mode according to the judgment result of the current system operation mode, wherein the operation mode comprises subsystem shutdown and subsystem charge-discharge switching.
Wherein the step S1011 includes:
in the process of setting control words and related parameters according to the specification of the serial energy storage system, the control words comprise automatic operation input, automatic operation startup and automatic operation shutdown, and the related parameters comprise subsystem power setting, total power setting of a system shutdown bus, subsystem shutdown power setting and subsystem operation normal power setting.
Wherein, the step S1023 includes:
the user sets the operation content of the system to be in the automatic operation process, wherein the operation content comprises the following steps: inputting an automatic operation strategy, clicking the automatic operation start-up, wherein the automatic operation comprises automatic operation initial state, start-up command judgment, ready signal judgment, full/empty signal judgment, bus total power abnormality judgment, subsystem power abnormality judgment and subsystem power normal judgment.
Wherein, the step S1031 includes:
in the process of collecting the running condition information of the BMS and the PCS in real time, the real-time collected condition information comprises an ith group of jth subsystems: SYS (System) ij I group j subsystem SOC: SOC (State of Charge) ij Total power of system bus: p (P) AC_bus I group system total power: p (P) i 。
Wherein, the step S1031 further includes:
in the process of collecting operation condition information in real time, optimizing the operation of the system by constructing a double-layer optimizing configuration model of the serial energy storage system;
the construction of the double-layer optimal configuration model of the serial energy storage system comprises the following steps: obtaining steady-state voltage and power distribution of the system by carrying out load flow calculation on corresponding data of the group string type energy storage system; carrying out upper planning on the system, and initializing each component of an upper objective function, wherein the weights of each objective function are obtained through an FCEM algorithm; and taking rated power and rated capacity of the primary solving system as input data of a lower model, performing lower-layer operation optimization of the system, iterating the upper layer and the lower layer, outputting an optimal scheme if the iterated output data meets a preset termination value, and calculating a voltage deviation and an energy storage optimal output value based on the optimal scheme.
The iteration process of the upper layer and the lower layer comprises the following steps:
judging whether the algorithm iterates to the optimal solution or not, if so, stopping calculation to obtain an optimal scheme; if the preset termination value is not met, judging that the solution is not optimal, substituting the system power scheduling value obtained after the lower-layer operation optimization into an upper-layer planning objective function, continuing to perform an iteration process from the upper-layer planning of the system, and further optimizing the result until an optimal scheme is output.
The obtaining the weights of the objective functions through the FCEM algorithm comprises the following steps:
determining a factor theory domain of an evaluation object through an upper-layer objective function configured by an energy storage system, wherein the evaluation object comprises a system investment cost G1, a line loss cost G2, a system full-load operation cost G3 and an energy storage operation loss cost G4; scoring the evaluation objects G1, G2, G3 and G4, and performing membership analysis by taking each index as an element; obtaining an index weight vector by adopting an AHP method; the relative importance of G1, G2, G3 and G4 to the objective function is compared one by one, a quantization result is used as a matrix element, a judgment matrix is established, the judgment matrix is normalized by a sum product method, an index weight vector is obtained, and then consistency check operation is carried out on the judgment matrix, so that the weight value of an evaluation index obtained by using an FCEM method is obtained.
Compared with the prior art, the invention has the following advantages:
a full-load operation automatic test method for a group string type energy storage system comprises the following steps: dividing the systems after the system specification setting is completed into a plurality of groups, wherein each group comprises two subsystems, analyzing each group of systems through collected operation condition information, and acquiring a system state analysis report; when each group is determined to have operation conditions according to the system state analysis report, the user sets the operation content of the system, and the system enters an automatic operation state according to the setting; in the automatic operation state process, the system acquires operation condition information in real time, analyzes the operation condition of the system in real time, and maintains or automatically adjusts the operation mode according to the current operation condition. The method automatically completes the power balance, all subsystems in the system run fully, and simultaneously, the subsystem stands outwards. In the testing process by using the method, the electric power is neither charged from the power grid nor discharged to the power grid, and no electricity consumption cost is generated. The method is suitable for system delivery and field test operation, and can test the stability of the system through full-load operation of all subsystems, and in continuous test, the aging verification of the system is also completed. In addition, by using the method, simultaneous testing of a plurality of systems can be realized without being limited by the load requirements of factories.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a flow chart of a method for automatically testing full load operation of a cluster type energy storage system according to an embodiment of the present invention;
FIG. 2 is a flow chart of an analysis of each group of systems in an embodiment of the invention;
FIG. 3 is a schematic diagram of the overall operation state of the system according to the embodiment of the present invention;
FIG. 4 is a logic control diagram of the overall operation of the system in an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
The embodiment of the invention provides a full-load operation automatic test method of a group string type energy storage system, which comprises the following steps:
s101: dividing the systems after the system specification setting is completed into a plurality of groups, wherein each group comprises two subsystems, analyzing each group of systems through collected operation condition information, and acquiring a system state analysis report;
s102: when each group is determined to have operation conditions according to the system state analysis report, the user sets the operation content of the system, and the system enters an automatic operation state according to the setting;
s103: in the automatic operation state process, the system acquires operation condition information in real time, analyzes the operation condition of the system in real time, and maintains or automatically adjusts the operation mode according to the current operation condition.
The working principle of the technical scheme is as follows:
the first step, setting control words and related parameters according to the system specification, wherein the parameters are described as follows:
1) Automatic operation investment: input/exit
Setting the test equipment as input when automatic test is needed; setting to exit when manual test or exit test is needed;
2) Automatic operation starting machine
When the automatic operation is put into operation and the test is started, setting the automatic operation to start;
3) Automatic operation shutdown
When the automatic operation is put into operation and the test is finished, setting the automatic operation to be shut down;
4)P set subsystem power settings
Setting the rated power or target power of the subsystem when the automatic operation is put into operation;
5)P bus_stop total power setting of system shutdown bus
Setting the total limit power of the alternating current bus when the automatic operation is put into operation;
6)P sys_stop subsystem shutdown power setting
Setting the power limit of each group when the automatic operation is put into operation;
7)P trans subsystem operation normal power setting
When the automatic operation is put into operation, the normal judgment power is set for each group of operation.
8) T0: setting of the downtime
Setting the machine halt time length when the machine is put into automatic operation;
9) T1 Power transition duration setting
Setting the power conversion time length when the automatic operation is put into operation;
secondly, dividing the system into a plurality of groups, wherein each group comprises two groups of serial systems, analyzing the states of the systems of each group by collecting information such as BMS, PCS and the like, and when each group has operation conditions, the systems of each group are ready, and collecting signals comprises the following steps: subsystem ready, BMS alert, BMS fault, PCS alert, PCS fault, BMS communication alert, PCS communication alert, battery full, battery empty, etc.
Thirdly, after the system is ready, the user sets the system to be automatically operated, clicks a start button, and the system enters an automatic operation state.
Fourth, the system collects running information such as BMS, PCS and the like in real time, the running condition of the system is analyzed in real time, and the real-time collected information is described as follows:
1)SYS ij ：
an ith group of jth subsystems for representing a subsystem state;
2)SOC ij ：
the ith group of the jth subsystem SOC is used for representing a certain subsystem SOC;
3)P AC_bus ：
the total power of the system alternating current bus is used for representing the total power of the system in the running process;
4)P i ：
the i-th group system power is used for representing the total power of a subsystem in the running process;
fifthly, the system keeps or automatically adjusts the operation mode according to the current operation condition, the overall operation state of the system is shown in fig. 3, the logic control is shown in fig. 4, and the automatic operation of the system is described as follows:
1) Automatic operation initial state:
if SOC is i1 >SOC i2 Then the i-th group of systems 1 is discharged and the systems 2 is charged;
if SOC is i1 <＝SOC i2 Then the ith group of system 1 charges and system 2 discharges；
The charge and discharge power is 25% P set ；
2) Judging a startup command:
if a shutdown command is received, the system shuts down, waits for the next startup command, and enters step 1);
if the shutdown command is not received, continuing to operate;
3) Ready signal determination
If SYS i1 Ready and SYS i2 The i group system continues to operate if the system is ready;
if SYS i1 Not ready or SYS i2 If not, the i group system is shut down, and resumes operation after T0 time, and the charge and discharge power is set to 25% P set Entering step 2);
4) Full and empty signal determination
If SYS i1 Filling or SYS i2 When the system is empty, the system of the ith group is shut down, and resumes operation after the T0 time, the system 1 discharges, the system 2 charges, and the charging and discharging power is set to 25% P set Entering step 2);
if SYS i1 Venting or SYS i2 If the system is full, the i-th group system is shut down, and resumes operation after T0 time, the system 1 is charged, the system 2 is discharged, and the charging and discharging power is set to 25% P set Entering step 2);
if SYS i1 Underfilling and not emptying and SYS i2 Under-filled and not emptied, the i-th group system continues to operate;
5) Judging the total power abnormality of the bus:
if P AC_bus >P bus_stop The system is shut down, and the operation is resumed after the T0 time, the charging and discharging power is set to 25% P set Entering step 2);
if P AC_bus <＝P bus_stop Continuing to operate;
6) Subsystem power abnormality judgment:
if P i >P sys_stop The ith group of system is shut down, and the operation is recovered after the T0 time, and the charging and discharging are performedPower is set to 25% Pset, and step 2) is entered;
if P i <＝P sys_stop The ith group continues to operate;
7) And (3) judging the normal power of the subsystem:
if P i >＝P trans The ith group continues to operate and enters step 2);
if P i <P trans Then group i continues to operate while:
if the charge-discharge power is set to 25% P set After time delay T1, the charge and discharge power is set to be 50% P set Entering step 2);
if the charge-discharge power is set to 50% P set After time delay T1, the charge and discharge power is set to 75% P set Entering step 2);
if the charge-discharge power is set to 75% P set After time delay T1, the charge and discharge power is set to be 100% P set Entering step 2);
if the charge-discharge power is set to 100% P set Step 2) is entered.
The beneficial effects of the technical scheme are as follows: dividing the systems after the system specification setting is completed into a plurality of groups, wherein each group comprises two subsystems, analyzing each group of systems through collected operation condition information, and acquiring a system state analysis report; when each group is determined to have operation conditions according to the system state analysis report, the user sets the operation content of the system, and the system enters an automatic operation state according to the setting; in the automatic operation state process, the system acquires operation condition information in real time, analyzes the operation condition of the system in real time, and maintains or automatically adjusts the operation mode according to the current operation condition. The method automatically completes the power balance, all subsystems in the system run fully, and simultaneously, the subsystem stands outwards. In the testing process by using the method, the electric power is neither charged from the power grid nor discharged to the power grid, and no electricity consumption cost is generated. The method is suitable for system delivery and field test operation, and can test the stability of the system through full-load operation of all subsystems, and in continuous test, the aging verification of the system is also completed. In addition, by using the method, simultaneous testing of a plurality of systems can be realized without being limited by the load requirements of factories.
In another embodiment, the step S101 includes:
s1011: setting control words and related parameters according to the specification of the serial energy storage system;
s1012: dividing the group string type energy storage system into a plurality of groups, wherein each group comprises two group string type subsystems;
s1013: and acquiring operation condition information of corresponding equipment, wherein the corresponding equipment comprises a battery management system BMS and an energy storage bidirectional converter PCS, and analyzing the systems of each group to acquire the states of the systems of each group.
The working principle of the technical scheme is as follows: collecting information of a battery management system (hereinafter referred to as BMS), an energy storage bidirectional converter (hereinafter referred to as PCS) and the like, and providing a plurality of control words and parameters for a user to set, wherein the method automatically controls the system to operate according to the control words and the parameters;
setting control words and related parameters according to the specification of the serial energy storage system; the group string type energy storage system is divided into a plurality of groups, each group comprises two group string type subsystems, the states of the systems of each group are analyzed by collecting information such as BMS, PCS and the like, and when each group has operation conditions, the systems of each group are ready, and collected signals comprise: subsystem ready, BMS alert, BMS fault, PCS alert, PCS fault, BMS communication alert, PCS communication alert, battery full, battery empty, etc.
The beneficial effects of the technical scheme are as follows: setting control words and related parameters according to the specification of the serial energy storage system; dividing the group string type energy storage system into a plurality of groups, wherein each group comprises two group string type subsystems; and acquiring operation condition information of corresponding equipment, wherein the corresponding equipment comprises a battery management system BMS and an energy storage bidirectional converter PCS, and analyzing the systems of each group to acquire the states of the systems of each group. The method automatically completes the power balance, all subsystems in the system run fully, and simultaneously, the subsystem stands outwards.
In another embodiment, the step S102 includes:
s1021: judging whether each group of systems has operation conditions according to the states of each group of systems, and if the judging result is that a certain group of systems does not have the operation conditions, resetting according to the system specification;
s1022: if the judging result is that each group of systems has the operation condition, each group of systems is ready;
s1023: after each group of systems are ready, the user sets the operation content of the systems to be automatic operation, clicks a start button, and the systems enter an automatic operation state.
The working principle of the technical scheme is as follows: judging whether each group of systems has operation conditions according to the states of each group of systems, and if the judging result is that a certain group of systems does not have the operation conditions, resetting according to the system specification; if the judging result is that each group of systems has the operation condition, each group of systems is ready; after each group of systems are ready, the user sets the operation content of the systems to be automatic operation, clicks a start button, and the systems enter an automatic operation state. By fully running the subsystems, the stability of the system can be tested, and in the continuous test, the aging verification of the system is also completed. In addition, by using the method, simultaneous testing of a plurality of systems can be realized without being limited by the load requirements of factories.
The beneficial effects of the technical scheme are as follows: judging whether each group of systems has operation conditions according to the states of each group of systems, and if the judging result is that a certain group of systems does not have the operation conditions, resetting according to the system specification; if the judging result is that each group of systems has the operation condition, each group of systems is ready; after each group of systems are ready, the user sets the operation content of the systems to be automatic operation, clicks a start button, and the systems enter an automatic operation state. By fully running the subsystems, the stability of the system can be tested, and in the continuous test, the aging verification of the system is also completed. In addition, by using the method, simultaneous testing of a plurality of systems can be realized without being limited by the load requirements of factories.
In another embodiment, the step S103 includes:
s1031: in the automatic running state process of the system, running condition information of the BMS and the PCS is collected in real time, the running condition of the system is analyzed in real time, and an analysis report of the corresponding condition is obtained, wherein the running condition information comprises a system ready state and a system fault state;
s1032: determining a current operation condition according to the analysis report of the corresponding condition, judging the current system operation mode according to the operation condition, and maintaining or automatically adjusting the operation mode according to the judgment result of the current system operation mode, wherein the operation mode comprises subsystem shutdown and subsystem charge-discharge switching.
The working principle of the technical scheme is as follows: in the automatic running state process of the system, running condition information of the BMS and the PCS is collected in real time, the running condition of the system is analyzed in real time, and an analysis report of the corresponding condition is obtained, wherein the running condition information comprises a system ready state and a system fault state; determining a current operation condition according to the analysis report of the corresponding condition, judging the current system operation mode according to the operation condition, and maintaining or automatically adjusting the operation mode according to the judgment result of the current system operation mode, wherein the operation mode comprises subsystem shutdown and subsystem charge-discharge switching.
The beneficial effects of the technical scheme are as follows: in the automatic running state process of the system, running condition information of the BMS and the PCS is collected in real time, the running condition of the system is analyzed in real time, and an analysis report of the corresponding condition is obtained, wherein the running condition information comprises a system ready state and a system fault state; determining a current operation condition according to the analysis report of the corresponding condition, judging the current system operation mode according to the operation condition, and maintaining or automatically adjusting the operation mode according to the judgment result of the current system operation mode, wherein the operation mode comprises subsystem shutdown and subsystem charge-discharge switching. By fully running the subsystems, the stability of the system can be tested, and in the continuous test, the aging verification of the system is also completed. In addition, by using the method, simultaneous testing of a plurality of systems can be realized without being limited by the load requirements of factories.
In another embodiment, the step S1011 includes:
in the process of setting control words and related parameters according to the specification of the serial energy storage system, the control words comprise automatic operation input, automatic operation startup and automatic operation shutdown, and the related parameters comprise subsystem power setting, total power setting of a system shutdown bus, subsystem shutdown power setting and subsystem operation normal power setting.
The working principle of the technical scheme is as follows: in the process of setting control words and related parameters according to the specification of the serial energy storage system, the control words comprise automatic operation input, automatic operation startup and automatic operation shutdown, and the related parameters comprise subsystem power setting, total power setting of a system shutdown bus, subsystem shutdown power setting and subsystem operation normal power setting.
The beneficial effects of the technical scheme are as follows: in the process of setting control words and related parameters according to the specification of the serial energy storage system, the control words comprise automatic operation input, automatic operation startup and automatic operation shutdown, and the related parameters comprise subsystem power setting, total power setting of a system shutdown bus, subsystem shutdown power setting and subsystem operation normal power setting. By fully running the subsystems, the stability of the system can be tested, and in the continuous test, the aging verification of the system is also completed. In addition, by using the method, simultaneous testing of a plurality of systems can be realized without being limited by the load requirements of factories.
In another embodiment, the step S1023 includes:
the user sets the operation content of the system to be in the automatic operation process, wherein the operation content comprises the following steps: inputting an automatic operation strategy, clicking the automatic operation start-up, wherein the automatic operation comprises automatic operation initial state, start-up command judgment, ready signal judgment, full/empty signal judgment, bus total power abnormality judgment, subsystem power abnormality judgment and subsystem power normal judgment.
The working principle of the technical scheme is as follows: the user sets the operation content of the system to be in the automatic operation process, wherein the operation content comprises the following steps: inputting an automatic operation strategy, clicking the automatic operation start-up, wherein the automatic operation comprises automatic operation initial state, start-up command judgment, ready signal judgment, full/empty signal judgment, bus total power abnormality judgment, subsystem power abnormality judgment and subsystem power normal judgment.
The beneficial effects of the technical scheme are as follows: the user sets the operation content of the system to be in the automatic operation process, wherein the operation content comprises the following steps: inputting an automatic operation strategy, clicking the automatic operation start-up, wherein the automatic operation comprises automatic operation initial state, start-up command judgment, ready signal judgment, full/empty signal judgment, bus total power abnormality judgment, subsystem power abnormality judgment and subsystem power normal judgment. By fully running the subsystems, the stability of the system can be tested, and in the continuous test, the aging verification of the system is also completed. In addition, by using the method, simultaneous testing of a plurality of systems can be realized without being limited by the load requirements of factories.
In another embodiment, the step S1031 includes:
in the process of collecting the running condition information of the BMS and the PCS in real time, the real-time collected condition information comprises an ith group of jth subsystems: SYS (System) ij I group j subsystem SOC: SOC (State of Charge) ij Total power of system bus: p (P) AC_bus I group system total power: p (P) i 。
The working principle of the technical scheme is as follows:
SYS ij : an ith group of jth subsystems for representing a subsystem state; SOC (State of Charge) ij : the ith group of the jth subsystem SOC is used for representing a certain subsystem SOC; p (P) AC_bus : the total power of the system alternating current bus is used for representing the total power of the system in the running process; p (P) i : the i-th group system power is used to represent the total power of a subsystem during operation.
The beneficial effects of the technical scheme are as follows: in the process of collecting the running condition information of the BMS and the PCS in real time, the real-time collected condition information comprises an ith group of jth subsystems: SYS (System) ij I group j subsystem SOC: SOC (State of Charge) ij Total power of system bus: p (P) AC_bus I group system total power: p (P) i 。
In another embodiment, the step S1031 further includes:
in the process of collecting operation condition information in real time, optimizing the operation of the system by constructing a double-layer optimizing configuration model of the serial energy storage system;
the construction of the double-layer optimal configuration model of the serial energy storage system comprises the following steps: obtaining steady-state voltage and power distribution of the system by carrying out load flow calculation on corresponding data of the group string type energy storage system; carrying out upper planning on the system, and initializing each component of an upper objective function, wherein the weights of each objective function are obtained through an FCEM algorithm;
and taking rated power and rated capacity of the primary solving system as input data of a lower model, performing lower-layer operation optimization of the system, iterating the upper layer and the lower layer, outputting an optimal scheme if the iterated output data meets a preset termination value, and calculating a voltage deviation and an energy storage optimal output value based on the optimal scheme.
The working principle of the technical scheme is as follows: in the process of collecting operation condition information in real time, optimizing the operation of the system by constructing a double-layer optimizing configuration model of the serial energy storage system; the construction of the double-layer optimal configuration model of the serial energy storage system comprises the following steps: obtaining steady-state voltage and power distribution of the system by carrying out load flow calculation on corresponding data of the group string type energy storage system; carrying out upper planning on the system, and initializing each component of an upper objective function, wherein the weights of each objective function are obtained through an FCEM algorithm; and taking rated power and rated capacity of the primary solving system as input data of a lower model, performing lower-layer operation optimization of the system, iterating the upper layer and the lower layer, outputting an optimal scheme if the iterated output data meets a preset termination value, and calculating a voltage deviation and an energy storage optimal output value based on the optimal scheme.
The beneficial effects of the technical scheme are as follows: in the process of collecting operation condition information in real time, optimizing the operation of the system by constructing a double-layer optimizing configuration model of the serial energy storage system; the construction of the double-layer optimal configuration model of the serial energy storage system comprises the following steps: obtaining steady-state voltage and power distribution of the system by carrying out load flow calculation on corresponding data of the group string type energy storage system; carrying out upper planning on the system, and initializing each component of an upper objective function, wherein the weights of each objective function are obtained through an FCEM algorithm; and taking rated power and rated capacity of the primary solving system as input data of a lower model, performing lower-layer operation optimization of the system, iterating the upper layer and the lower layer, outputting an optimal scheme if the iterated output data meets a preset termination value, and calculating a voltage deviation and an energy storage optimal output value based on the optimal scheme. The optimizing capability is further enhanced, the early convergence speed is increased, and the optimum value can be converged earlier.
In another embodiment, the upper and lower layers perform an iterative process comprising:
judging whether the algorithm iterates to the optimal solution or not, if so, stopping calculation to obtain an optimal scheme; if the preset termination value is not met, judging that the solution is not optimal, substituting the system power scheduling value obtained after the lower-layer operation optimization into an upper-layer planning objective function, continuing to perform an iteration process from the upper-layer planning of the system, and further optimizing the result until an optimal scheme is output.
The working principle of the technical scheme is as follows: judging whether the algorithm iterates to the optimal solution or not, if so, stopping calculation to obtain an optimal scheme; if the preset termination value is not met, judging that the solution is not optimal, substituting the system power scheduling value obtained after the lower-layer operation optimization into an upper-layer planning objective function, continuing to perform an iteration process from the upper-layer planning of the system, and further optimizing the result until an optimal scheme is output.
The beneficial effects of the technical scheme are as follows: judging whether the algorithm iterates to the optimal solution or not, if so, stopping calculation to obtain an optimal scheme; if the preset termination value is not met, judging that the solution is not optimal, substituting the system power scheduling value obtained after the lower-layer operation optimization into an upper-layer planning objective function, continuing to perform an iteration process from the upper-layer planning of the system, and further optimizing the result until an optimal scheme is output. The optimizing capability is further enhanced, the early convergence speed is increased, and the optimum value can be converged earlier.
In another embodiment, the obtaining the objective function weights by the FCEM algorithm includes:
determining a factor theory domain of an evaluation object through an upper-layer objective function configured by an energy storage system, wherein the evaluation object comprises a system investment cost G1, a line loss cost G2, a system full-load operation cost G3 and an energy storage operation loss cost G4; scoring the evaluation objects G1, G2, G3 and G4, and performing membership analysis by taking each index as an element; obtaining an index weight vector by adopting an AHP method; the relative importance of G1, G2, G3 and G4 to the objective function is compared one by one, a quantization result is used as a matrix element, a judgment matrix is established, the judgment matrix is normalized by a sum product method, an index weight vector is obtained, and then consistency check operation is carried out on the judgment matrix, so that the weight value of an evaluation index obtained by using an FCEM method is obtained.
The working principle of the technical scheme is as follows: determining a factor theory domain of an evaluation object through an upper-layer objective function configured by an energy storage system, wherein the evaluation object comprises a system investment cost G1, a line loss cost G2, a system full-load operation cost G3 and an energy storage operation loss cost G4; scoring the evaluation objects G1, G2, G3 and G4, and performing membership analysis by taking each index as an element; obtaining an index weight vector by adopting an AHP method; the relative importance of G1, G2, G3 and G4 to the objective function is compared one by one, a quantization result is used as a matrix element, a judgment matrix is established, the judgment matrix is normalized by a sum product method, an index weight vector is obtained, and then consistency check operation is carried out on the judgment matrix, so that the weight value of an evaluation index obtained by using an FCEM method is obtained.
Wherein, the expression of the objective function is:
minf＝αG1+βG2+γG3+δG4
wherein, minf is expressed as an objective function value, G1 is expressed as a system investment cost, G2 is expressed as a line loss cost, G3 is expressed as a system full-load operation cost, and G4 is expressed as an energy storage operation loss cost; α, β, γ, δ are expressed as respective corresponding target weights, α+β+γ+δ=1. Thereby planning the upper layer of the system through the objective function.
The beneficial effects of the technical scheme are as follows: determining a factor theory domain of an evaluation object through an upper-layer objective function configured by an energy storage system, wherein the evaluation object comprises a system investment cost G1, a line loss cost G2, a system full-load operation cost G3 and an energy storage operation loss cost G4; scoring the evaluation objects G1, G2, G3 and G4, and performing membership analysis by taking each index as an element; obtaining an index weight vector by adopting an AHP method; the relative importance of G1, G2, G3 and G4 to the objective function is compared one by one, a quantization result is used as a matrix element, a judgment matrix is established, the judgment matrix is normalized by a sum product method, an index weight vector is obtained, and then consistency check operation is carried out on the judgment matrix, so that the weight value of an evaluation index obtained by using an FCEM method is obtained.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (6)
1. The automatic test method for full-load operation of the group string type energy storage system is characterized by comprising the following steps of:
s101: dividing the systems after the system specification setting is completed into a plurality of groups, wherein each group comprises two subsystems, analyzing each group of systems through collected operation condition information, and acquiring a system state analysis report;
s102: when each group is determined to have operation conditions according to the system state analysis report, the user sets the operation content of the system, and the system enters an automatic operation state according to the setting;
s103: in the automatic operation state process of the system, the system acquires operation condition information in real time, analyzes the operation condition of the system in real time, and maintains or automatically adjusts the operation mode according to the current operation condition;
the step S103 includes:
s1031: in the automatic running state process of the system, running condition information of the BMS and the PCS is collected in real time, the running condition of the system is analyzed in real time, and an analysis report of the corresponding condition is obtained, wherein the running condition information comprises a system ready state and a system fault state;
s1032: determining a current operation condition according to the analysis report of the corresponding condition, judging the current system operation mode according to the operation condition, and maintaining or automatically adjusting the operation mode according to the judgment result of the current system operation mode, wherein the operation mode comprises subsystem shutdown and subsystem charge-discharge switching;
the step S1031 includes:
in the process of collecting the running condition information of the BMS and the PCS in real time, the real-time collected condition information comprises an ith group of jth subsystems: SYSij, i group j subsystem SOC: SOCij, total power of system bus: pac_bus, i group system total power: pi;
the step S1031 further includes:
in the process of collecting operation condition information in real time, optimizing the operation of the system by constructing a double-layer optimizing configuration model of the serial energy storage system;
the construction of the double-layer optimal configuration model of the serial energy storage system comprises the following steps: obtaining steady-state voltage and power distribution of the system by carrying out load flow calculation on corresponding data of the group string type energy storage system; carrying out upper planning on the system, and initializing each component of an upper objective function, wherein the weights of each objective function are obtained through an FCEM fuzzy comprehensive evaluation algorithm;
taking rated power and rated capacity of the primary solving system as input data of a lower model, performing lower operation optimization of the system, iterating the upper layer and the lower layer, outputting an optimal scheme if the iterated output data meets a preset termination value, and calculating voltage deviation and an energy storage optimal output value based on the optimal scheme;
the obtaining of the weights of the objective functions through the FCEM algorithm comprises the following steps:
determining a factor theory domain of an evaluation object through an upper-layer objective function configured by an energy storage system, wherein the evaluation object comprises a system investment cost G1, a line loss cost G2, a system full-load operation cost G3 and an energy storage operation loss cost G4; scoring the evaluation objects G1, G2, G3 and G4, and performing membership analysis by taking each index as an element; obtaining an index weight vector by adopting an AHP method; the relative importance of G1, G2, G3 and G4 to the objective function is compared one by one, a quantization result is used as a matrix element, a judgment matrix is established, the judgment matrix is normalized by adopting a sum product method, an index weight vector is obtained, and then consistency check operation is carried out on the judgment matrix, so that the weight value of an evaluation index obtained by using an FCEM algorithm is obtained.
2. The method for automatically testing full-load operation of a serial energy storage system according to claim 1, wherein the step S101 comprises:
s1011: setting control words and related parameters according to the specification of the serial energy storage system;
s1012: dividing the group string type energy storage system into a plurality of groups, wherein each group comprises two group string type subsystems;
s1013: and acquiring operation condition information of corresponding equipment, wherein the corresponding equipment comprises a battery management system BMS and an energy storage bidirectional converter PCS, and analyzing the systems of each group to acquire the states of the systems of each group.
3. The method for automatically testing full load operation of a serial energy storage system according to claim 1, wherein said step S102 comprises:
s1021: judging whether each group of systems has operation conditions according to the states of each group of systems, and if the judging result is that a certain group of systems does not have the operation conditions, resetting according to the system specification;
s1022: if the judging result is that each group of systems has the operation condition, each group of systems is ready;
s1023: after each group of systems are ready, the user sets the operation content of the systems to be automatic operation, clicks a start button, and the systems enter an automatic operation state.
4. The method for automatically testing full load operation of a serial energy storage system according to claim 2, wherein said step S1011 comprises:
in the process of setting control words and related parameters according to the specification of the serial energy storage system, the control words comprise automatic operation input, automatic operation startup and automatic operation shutdown, and the related parameters comprise subsystem power setting, total power setting of a system shutdown bus, subsystem shutdown power setting and subsystem operation normal power setting.
5. The method for automatically testing full load operation of a serial energy storage system according to claim 3, wherein said step S1023 comprises:
the user sets the operation content of the system to be in the automatic operation process, wherein the operation content comprises the following steps: inputting an automatic operation strategy, clicking the automatic operation start-up, wherein the automatic operation comprises automatic operation initial state, start-up command judgment, ready signal judgment, full/empty signal judgment, bus total power abnormality judgment, subsystem power abnormality judgment and subsystem power normal judgment.
6. The method for automatically testing full-load operation of a serial energy storage system according to claim 1, wherein the iterative process performed by the upper layer and the lower layer comprises:
judging whether the algorithm iterates to the optimal solution or not, if so, stopping calculation to obtain an optimal scheme; if the preset termination value is not met, judging that the solution is not optimal, substituting the system power scheduling value obtained after the lower-layer operation optimization into an upper-layer planning objective function, continuing to perform an iteration process from the upper-layer planning of the system, and further optimizing the result until an optimal scheme is output.
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