Configuration and energy management method of energy storage type power test platform

Abstract

The invention discloses a configuration and energy management method of an energy storage type power test platform, and the method comprises the steps: determining a corresponding working condition according to the transient load characteristics of the power test platform, the steady-state load characteristics of the power test platform, the transient power characteristics allowed by a grid-connected point, and the steady-state power characteristics allowed by the grid-connected point; then, the corresponding minimum power and the corresponding minimum capacity of the energy storage system are calculated according to the corresponding working conditions so as to adapt to different energy storage system configurations; and meanwhile, in different working conditions, determination is carried out according to the relationship among the load value of the test platform, the steady-state load characteristic of the power test platform, the transient power characteristic allowed by the grid-connected point and the steady-state power characteristic allowed by the grid-connected point. The method effectively solves the problem that the test power level of the electrical equipment is too large but the capacity of a grid-connected point is limited, and is also suitable for working conditions with predictable, plannable, adjustable and controllable loads, such as power consumption scenes with capacity-increasing requirements, such as charging stations, electrified intelligent buildings and parks.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage system control, and in particular to a configuration and energy management method of an energy storage type power test platform. Background Art

[0002] The power test platform for electrical equipment is divided into two categories: Type I is the circulating type, that is, the test platform is connected to a public grid point, providing input and output test interfaces for the test equipment; Type II is the direct grid type, that is, the test platform is connected to a public grid point to input power and provide an output test interface for the test equipment. The grid capacity required for Type I is the loss of the test equipment and the equipment to be tested, which is generally 15% of the capacity of the test equipment, and the grid capacity required for Type II is 130% of the capacity of the test equipment. With the increasing power level of electrical equipment, especially the testing requirements of MW-level equipment, the user-side grid can no longer meet the capacity requirements of the test platform, and port expansion and equipment transformation are not economical and feasible.

[0003] Therefore, in view of the shortcomings of the existing technology, it is necessary to provide a configuration and energy management method of an energy storage power testing platform to solve the shortcomings of the existing technology. Summary of the invention

[0004] The purpose of the present invention is to avoid the shortcomings of the prior art and provide a configuration and energy management method of an energy storage type power test platform. The configuration and energy management method of the energy storage type power test platform can effectively solve the problem that the power level of electrical equipment testing is too large but the capacity of the grid connection point is limited.

[0005] The above-mentioned purpose of the present invention is achieved by the following technical measures:

[0006] Provided is a configuration and energy management method for an energy storage power test platform, wherein the corresponding operating condition is determined according to the relationship between the transient load characteristics of the power test platform, the steady-state load characteristics of the power test platform, the transient power characteristics allowed by the grid connection point, and the steady-state power characteristics allowed by the grid connection point, and then the corresponding minimum power and the corresponding minimum capacity of the energy storage system are calculated according to the corresponding operating condition, so as to adapt to different energy storage system configurations; at the same time, in different operating conditions, the corresponding operating power of the energy storage system is determined according to the relationship between the load value of the test platform and the steady-state load characteristics of the power test platform, the transient power characteristics allowed by the grid connection point, and the steady-state power characteristics allowed by the grid connection point, so as to perform segmented energy management of the energy storage system.

[0007] Preferably, the transient load characteristic of the power test platform is the transient peak power P of the power test platform. transient-peak-load The maximum duration of transient peak power of the power test platform t transient-peak-load .

[0008] Preferably, the steady-state load characteristic of the power test platform is the steady-state peak power P of the power test platform. steady-peak-load The maximum duration of peak power of the power test platform is t steady-peak-load .

[0009] Preferably, the above-mentioned grid connection point allows transient power characteristics to be grid connection point allows transient peak power P transient-peak-pcc The maximum duration t of transient peak power allowed at the grid connection point transient-peak-pcc .

[0010] Preferably, the grid-connected point allows steady-state power characteristics as follows: steady-peak-pcc .

[0011] Preferably, the transient peak power P of the test platform transient-peak-load Greater than the steady-state peak power P of the test platform steady-peak-load .

[0012] The configuration and energy management method of the energy storage power test platform of the present invention is based on the steady-state peak power P of the test platform. steady-peak-load The peak power P allowed at the grid connection point steady-peak-pcc The relationship between the transient peak power P of the test platform transient-peak-load The transient peak power P allowed at the grid connection point transient-peak-pcc The relationship between the maximum duration t of the transient peak power allowed at the grid connection point transient-peak-pcc The maximum duration t of the transient peak power of the test platform transient-peak-load The relationship between them jointly determines the working condition, and then calculates and configures the minimum power P of the energy storage system in the corresponding working condition. min-EES and configure the minimum capacity W of the energy storage system min-EES , thus adapting to different energy storage system configurations.

[0013] Preferably, the above-mentioned operating conditions include 7 types, namely the first operating condition, the second operating condition, the third operating condition, the fourth operating condition, the fifth operating condition, the sixth operating condition and the seventh operating condition.

[0014] Preferably, the first working condition is that the grid connection point allows a steady-state peak power P transient-peak-pcc ≥ Steady-state peak power P of the test platform steady-peak-load , the grid-connected point allows transient peak power P transient-peak-pcc ≥ Transient peak power P of the test platform transient-peak-load , and the maximum duration t of transient peak power allowed at the grid connection point transient-peak-pcc <The maximum duration of transient peak power of the test platform t transient-peak-load .

[0015] Preferably, the second working condition is that the grid connection point allows a steady-state peak power P steady-peak-pcc≥ Steady-state peak power P of the test platform steady-peak-load , the grid-connected point allows transient peak power P transient-peak-pcc <Transient peak power P of the test platform transient-peak-load , and the maximum duration t of transient peak power allowed at the grid connection point transient-peak-pcc ≥ Maximum duration of transient peak power of the test platform t transient-peak-load .

[0016] Preferably, the third working condition is that the grid connection point allows a steady-state peak power P steady-peak-pcc ≥ Steady-state peak power P of the test platform steady-peak-load , the grid-connected point allows transient peak power P transient-peak-pcc <Transient peak power P of the test platform transient-peak-load , and the maximum duration t of transient peak power allowed at the grid connection point transient-peak-pcc <The maximum duration of transient peak power of the test platform t transient-peak-load .

[0017] Preferably, the fourth working condition is that the grid connection point allows a steady-state peak power P steady-peak-pcc <Steady-state peak power P of the test platform steady-peak-load , the grid-connected point allows transient peak power P transient-peak-pcc ≥ Transient peak power P of the test platform transient-peak-load , and the maximum duration t of transient peak power allowed at the grid connection point transient-peak-pcc ≥ Maximum duration of transient peak power of the test platform t transient-peak-load .

[0018] Preferably, the fifth working condition is that the grid connection point allows a steady-state peak power P steady-peak-pcc <Steady-state peak power P of the test platform steady-peak-load , the grid-connected point allows transient peak power P transient-peak-pcc ≥ Transient peak power P of the test platform transient-peak-load , and the maximum duration t of transient peak power allowed at the grid connection point transient-peak-pcc <The maximum duration of transient peak power of the test platform t transient-peak-load .

[0019] Preferably, the sixth working condition is that the grid connection point allows a steady-state peak power P steady-peak-pcc <Steady-state peak power P of the test platform steady-peak-load , the grid-connected point allows transient peak power P transient-peak-pcc <Transient peak power P of the test platform transient-peak-load , and the maximum duration t of transient peak power allowed at the grid connection point transient-peak-pcc ≥ Maximum duration of transient peak power of the test platform t transient-peak-load .

[0020] Preferably, the seventh working condition is that the grid connection point allows a steady-state peak power P steady-peak-pcc <Steady-state peak power P of the test platform steady-peak-load , the grid-connected point allows transient peak power P transient-peak-pcc <Transient peak power P of the test platform transient-peak-load , and the maximum duration t of transient peak power allowed at the grid connection point transient-peak-pcc <The maximum duration of transient peak power of the test platform t transient-peak-load .

[0021] In the first working condition, the energy storage system calculates the minimum power P by formula (1): min-EES Thus, the power difference exceeding the transient peak power of the grid connection point outside the allowed time is compensated, and the minimum capacity W is calculated by formula (2) min-EES To provide capacity support:

[0022] P min-EES =P transient-peak-load -P steady-peak-pcc ...Formula (1); W min-EES =(P transient-peak-load -P steady-peak-pcc )×(t transient-peak-load -t transient-peak-pcc )

[0023] ...Formula (2).

[0024] Preferably, the above-mentioned allowed time is the maximum duration of the peak power of the power test platform t steady-peak-load Maximum duration t of transient peak power allowed at the grid connection point transient-peak-pcc The difference.

[0025] In the second working condition, the energy storage system calculates the minimum power P by formula (3): min-EES In this way, the difference between the transient peak power allowed by the grid connection point is compensated, and the minimum capacity W is calculated by formula (4): min-EES To provide capacity support:

[0026] P min-EES =P transient-peak-load -P transient-peak-pcc ...Formula (3);

[0027] W min-EES =(P transient-peak-load -P transient-peak-pcc )×t transient-peak-load

[0028] ...Formula (4).

[0029] In the third working condition, the energy storage system calculates the minimum power P by formula (5): min-EESThus, the difference between the transient peak power allowed at the grid connection point and the steady peak power allowed at the grid connection point is compensated, and the minimum capacity W is calculated by formula (6): min-EES To provide capacity support:

[0030] P min-EES =P transient-peak-load -P steady-peak-pcc ……Formula (5)

[0031] W min-EES =(P transient-peak-load -P transient-peak-pcc )×(t transient-peak-load -t transient-peak-pcc )+

[0032] (P transient-peak-load -P steady-peak-pcc )×t transient-peak-pcc

[0033] ...Formula (6).

[0034] In the fourth working condition, the energy storage system calculates the minimum power P by formula (7): min-EES Thus, the difference of the peak power allowed by the grid connection point is compensated, and the minimum capacity W is calculated by formula (8): min-EES To provide capacity support:

[0035] P min-EES =P steady-peak-load -P steady-peak-pcc ...Formula (7);

[0036] W min-EES =(P steady-peak-load -P steady-peak-pcc )×t steady-peak-load

[0037] ...Formula (8).

[0038] In the fifth working condition, the energy storage system calculates the minimum power P by formula (9): min-EES Thus, the power difference between the steady-state and transient peak values ​​at the grid connection point is compensated, and the minimum capacity W is calculated by formula (10): min-EES To provide capacity support:

[0039] P min-EES =P transient-peak-load -P steady-peak-pcc ...Formula (9);

[0040] W min-EES =(P transient-peak-load -P steady-peak-pcc )×(t transient-peak-load -t transient-peak-pcc )+

[0041] (P transient-peak-load -P transient-peak-pcc )×t transient-peak-pcc +(P steady-peak-load -P steady-peak-pcc )×t steady-peak-load

[0042] ...Formula (10).

[0043] In the sixth working condition, the energy storage system selects the larger value as the minimum power P by comparing the calculations of equations (11) and (12). min-EES The difference between the transient peak power allowed by the grid connection point and the steady-state peak power allowed by the grid connection point, and the minimum capacity W is calculated by formula (13): min-EES To provide capacity support:

[0044] P min-EES =P transient-peak-load -P transient-peak-pcc ...Formula (11);

[0045] P min-EES =P steady-peak-load -P steady-peak-pcc ...Formula (12);

[0046] W min-EES =(P transient-peak-load -P transient-peak-pcc )×t transient-peak-load +

[0047] (P steady-peak-load -P steady-peak-pcc )×t steady-peak-load

[0048] ...Formula (13).

[0049] In the seventh working condition, the energy storage system calculates the minimum power P by formula (14): min-EES In this way, the difference between the transient peak power allowed at the grid connection point and the steady-state peak power allowed at the grid connection point is compensated, and the minimum capacity W is calculated by formula (15): min-EES To provide capacity support:

[0050] P min-EES =P transient-peak-load -P steady-peak-pcc ...Formula (14); W min-EES =(P transient-peak-load -P transient-peak-pcc )×(t transient-peak-load -t transient-peak-pcc )+

[0051] (P transient-peak-load -P steady-peak-pcc )×t transient-peak-pcc+(P steady-peak-load -P steady-peak-pcc )×t steady-peak-load

[0052] ...Formula (15).

[0053] Preferably, the segmented energy management of the energy storage system is performed in different working conditions according to the load value of the test platform and the steady-state peak power P of the test platform. steady-peak-load The peak power P allowed at the grid connection point steady-peak-pcc The relationship between the time of the test platform load value and the maximum duration t of the transient peak power of the test platform transient-peak-load The relationship between them corresponds to selecting the operating power of the energy storage system.

[0054] In the first working condition:

[0055] Test platform load value P lasd (t) exceeds the grid-connected point allowable steady-state peak power P steady-peak-pcc , and the duration t is greater than the maximum duration t of the transient peak power allowed at the grid connection point transient-peak-pcc When the energy storage system operates according to the power P1, the power P1 is obtained by formula (16), otherwise the energy storage system is in standby mode and the power is 0; wherein the power operation function P of the energy storage system in the second working condition EES (t) is shown in formula (17):

[0056] P1=P transient-peak-load -P steady-peak-pcc ...Formula (16);

[0057]

[0058] In the second working condition:

[0059] When the test platform load value P load (t) Exceeds the transient peak power P allowed at the grid connection point transient-peak-pcc , the energy storage system operates according to power P2, and power P2 is obtained by formula (18), otherwise the energy storage system is in standby mode and the power is 0; wherein the power operation function P of the energy storage system in the second working condition EES (t) is shown in formula (19):

[0060] P2=P transient-peak-load -P transient-peak-pcc ...Formula (18);

[0061]

[0062] In the third working condition:

[0063] When the test platform load value Pload (t) exceeds the grid-connected point allowable steady-state peak power P steady-peak-pcc When the duration t is greater than the maximum duration t of the transient peak power allowed at the grid connection point transient-peak-pcc When the load value of the test platform is P load (t) exceeds the grid-connected point allowable steady-state peak power P steady-peak-pcc When the duration t is less than the maximum duration t of transient peak power allowed at the grid connection point transient-peak-pcc When the energy storage system is in standby mode, the power is P2; otherwise, the energy storage system is in standby mode and the power is 0; wherein the power operation function P of the energy storage system in the third working condition EES (t) is shown in formula (20):

[0064]

[0065] In the fourth working condition:

[0066] When the test platform load value P load (t) exceeds the grid-connected point allowable steady-state peak power P steady-peak-pcc But it does not exceed the steady-state peak power P of the test platform steady-peak-load When the energy storage system in the fourth working condition operates at power P3, the power P3 is obtained by formula (21); otherwise, the energy storage system is in standby mode and the power is 0; the power operation function P of the energy storage system in the fourth working condition is EES (t) is shown in formula (22):

[0067] P3=P steady-peak-load -P steady-peak-pcc ...Formula (21);

[0068]

[0069] In the fifth working condition:

[0070] When the test platform load value P load (t) exceeds the grid-connected point allowable steady-state peak power P steady-peak-pcc But it does not exceed the steady-state peak power P of the test platform steady-peak-load When the load value of the test platform is P load (t) exceeds the steady-state peak power P of the test platform steady-peak-load , and the duration t is less than the maximum duration t of the transient peak power allowed at the grid connection point transient-peak-pcc When the load value of the test platform is P load (t) exceeds the steady-state peak power P of the test platform steady-peak-load, and the duration t is greater than the maximum duration t of the transient peak power allowed at the grid connection point transient-peak-pcc When the energy storage system in the fifth working condition operates at the power of P1; otherwise, the energy storage system is in standby mode and the power is 0; the power operation function P of the energy storage system in the fifth working condition EES (t) is shown in formula (23):

[0071]

[0072] In the sixth working condition:

[0073] When the test platform load value P load (t) The allowed steady-state peak power P at the grid connection point steady-peak-pcc But it is less than the steady-state peak power P of the test platform steady-peak-load When the energy storage system of the sixth working condition operates at P3 power; when the test platform load value P load (t) exceeds the steady-state peak power P of the test platform steady-peak-load When the sixth working condition energy storage system operates at P2 power; otherwise, the energy storage system is in standby mode and the power is 0; the power operation function P of the energy storage system in the sixth working condition EES (t) is shown in formula (24):

[0074]

[0075] In the seventh working condition:

[0076] When the test platform load value P load (t) exceeds the grid-connected point allowable steady-state peak power P steady-peak-pcc But it is less than the steady-state peak power P of the test platform steady-peak-load When the energy storage system of the seventh working condition operates at power P3; when the load value of the test platform is P load (t) exceeds the steady-state peak power P of the test platform steady-peak-load , and the duration t is less than the maximum duration t of the transient peak power allowed at the grid connection point transient-peak-pcc When the load value of the test platform is P load (t) exceeds the steady-state peak power P of the test platform steady-peak-load , and the duration t is greater than the maximum duration t of the transient peak power allowed at the grid connection point transient-peak-pcc When the energy storage system in the seventh working condition operates at P1 power; otherwise, the energy storage system is in standby mode and the power is 0; the power operation function P of the energy storage system in the seventh working condition EES (t) is shown in formula (25):

[0077]

[0078] The configuration and energy management method of an energy storage power test platform of the present invention determines the corresponding working condition according to the relationship between the transient load characteristics of the power test platform, the steady-state load characteristics of the power test platform, the transient power characteristics allowed by the grid connection point, and the steady-state power characteristics allowed by the grid connection point, and then calculates the corresponding minimum power and the corresponding minimum capacity of the energy storage system according to the corresponding working condition, so as to adapt to different energy storage system configurations; at the same time, in different working conditions, the corresponding operating power of the energy storage system is determined according to the relationship between the load value of the test platform and the steady-state load characteristics of the power test platform, the transient power characteristics allowed by the grid connection point, and the steady-state power characteristics allowed by the grid connection point, so as to perform segmented energy management of the energy storage system. As the power level of electrical equipment becomes larger and larger, especially the testing requirements of MW-level equipment, the user-side power grid can no longer meet the capacity requirements of the test platform, and port expansion and equipment transformation are not economical and feasible. The configuration and energy management method of the energy storage power testing platform of the present invention can economically and effectively solve the problem of excessive power level of electrical equipment testing but limited capacity of the grid connection point. The method is also applicable to working conditions where the load has predictable, plannable, adjustable and controllable characteristics, such as charging stations, electrified smart buildings and parks, and other power consumption scenarios with increased capacity demand. BRIEF DESCRIPTION OF THE DRAWINGS

[0079] The present invention is further described with reference to the accompanying drawings, but the contents in the accompanying drawings do not constitute any limitation to the present invention.

[0080] Figure 1 The present invention is a flow chart of a configuration and energy management method of an energy storage power test platform.

[0081] Figure 2 Schematic diagram of the application scenario of the energy storage power test platform. DETAILED DESCRIPTION

[0082] The technical solution of the present invention is further described in conjunction with the following embodiments.

[0083] Example 1

[0084] A configuration and energy management method of an energy storage power test platform, such as Figure 1, determine the corresponding working condition according to the relationship between the transient load characteristics of the power test platform, the steady-state load characteristics of the power test platform, the transient power characteristics allowed by the grid connection point, and the steady-state power characteristics allowed by the grid connection point, and then calculate the corresponding minimum power and corresponding minimum capacity of the energy storage system according to the corresponding working condition, so as to adapt to different energy storage system configurations; at the same time, in different working conditions, determine the corresponding operating power of the energy storage system according to the relationship between the load value of the test platform and the steady-state load characteristics of the power test platform, the transient power characteristics allowed by the grid connection point, and the steady-state power characteristics allowed by the grid connection point, so as to perform segmented energy management of the energy storage system. The application scenarios of the energy storage power test platform of the present invention are as follows: Figure 2 , including energy storage system equipment, electrical equipment power test platform equipment and the common bus of the grid connection point where the equipment is connected in parallel. The test platform load value is also called the test platform real-time value.

[0085] The transient load characteristic of the power test platform is the transient peak power P of the power test platform. transient-peak-load The maximum duration of transient peak power of the power test platform t transient-peak-load The steady-state load characteristic of the power test platform is the steady-state peak power P of the power test platform. steady-peak-load The maximum duration of peak power of the power test platform is t steady-peak-load The transient peak power of the test platform P transient-peak-load Greater than the steady-state peak power P of the test platform steady-peak-load .

[0086] The grid-connected point allowable transient power characteristic is the grid-connected point allowable transient peak power P transient-peak-pcc The maximum duration t of transient peak power allowed at the grid connection point transient-peak-pcc .

[0087] The grid-connected point allowable steady-state power characteristic is the grid-connected point allowable steady-state peak power P steady-peak-pcc .

[0088] The configuration and energy management method of the energy storage power test platform of the present invention is based on the steady-state peak power P of the test platform. steady-peak-load The peak power P allowed at the grid connection point steady-peak-pcc The relationship between the transient peak power P of the test platform transient-peak-load The transient peak power P allowed at the grid connection point transient-peak-pcc The relationship between the maximum duration t of the transient peak power allowed at the grid connection point transient-peak-pcc The maximum duration t of the transient peak power of the test platform transient-peak-load The relationship between them jointly determines the working condition, and then calculates and configures the minimum power P of the energy storage system in the corresponding working condition. min-EES and configure the minimum capacity W of the energy storage system min-EES , thus adapting to different energy storage system configurations.

[0089] There are 7 working conditions, namely the first working condition, the second working condition, the third working condition, the fourth working condition, the fifth working condition, the sixth working condition and the seventh working condition.

[0090] The first operating condition is the grid-connected point allowable steady-state peak power P transient-peak-pcc ≥ Steady-state peak power P of the test platform steady-peak-load , the grid-connected point allows transient peak power P transient-peak-pcc

[0091] ≥ Transient peak power P of the test platform transient-peak-load , and the maximum duration t of transient peak power allowed at the grid connection point transient-peak-pcc <The maximum duration of transient peak power of the test platform t transient-peak-load In the first working condition, the energy storage system calculates the minimum power P by formula (1): min-EES Thus, the power difference exceeding the transient peak power of the grid connection point outside the allowed time is compensated, and the minimum capacity W is calculated by formula (2) min-EES To provide capacity support:

[0092] P min-EES =P transient-peak-load -P steady-peak-pcc ...Formula (1); W min-EES =(P transient-peak-load -P steady-peak-pcc )×(t transient-peak-load -t transient-peak-pcc )

[0093] ...Formula (2).

[0094] The maximum duration of the peak power of the power test platform is t steady-peak-load Maximum duration t of transient peak power allowed at the grid connection point transient-peak-pcc The difference.

[0095] The second operating condition is the grid-connected point allowable steady-state peak power P steady-peak-pcc ≥ Steady-state peak power P of the test platform steady-peak-load , the grid-connected point allows transient peak power P transient-peak-pcc <

[0096] The transient peak power P of the test platform transient-peak-load , and the maximum duration t of transient peak power allowed at the grid connection point transient-peak-pcc ≥ Maximum duration of transient peak power of the test platform t transient-peak-load .

[0097] In the second working condition, the energy storage system calculates the minimum power P by formula (3): min-EESIn this way, the difference between the transient peak power allowed by the grid connection point is compensated, and the minimum capacity W is calculated by formula (4): min-EES To provide capacity support:

[0098] P min-EES =P transient-peak-load -P transient-peak-pcc ...Formula (3);

[0099] W min-EES =(P transient-peak-load -P transient-peak-pcc )×t transient-peak-load

[0100] ...Formula (4).

[0101] The third operating condition is the grid-connected point allowable steady-state peak power P steady-peak-pcc ≥ Steady-state peak power P of the test platform steady-peak-load , the grid-connected point allows transient peak power P transient-peak-pcc <Transient peak power P of the test platform transient-peak-load , and the maximum duration t of transient peak power allowed at the grid connection point transient-peak-pcc <The maximum duration of transient peak power of the test platform t transient-peak-load .

[0102] In the third working condition, the energy storage system calculates the minimum power P by formula (5): min-EES Thus, the difference between the transient peak power allowed at the grid connection point and the steady peak power allowed at the grid connection point is compensated, and the minimum capacity W is calculated by formula (6): min-EES To provide capacity support:

[0103] P min-EES =P transient-peak-load -P steady-peak-pcc ...Formula (5);

[0104] W min-EES =(P transient-peak-load -P transient-peak-pcc )×(t transient-peak-load -t transient-peak-pcc )+

[0105] (P transient-peak-load -P steady-peak-pcc )×t transient-peak-pcc

[0106] ...Formula (6).

[0107] The fourth working condition is that the grid connection point allows the steady-state peak power P steady-peak-pcc <Steady-state peak power P of the test platform steady-peak-load , the grid-connected point allows transient peak power P transient-peak-pcc ≥ Transient peak power P of the test platformtransient-peak-load , and the maximum duration t of transient peak power allowed at the grid connection point transient-peak-pcc ≥ Maximum duration of transient peak power of the test platform t transient-peak-load .

[0108] In the fourth working condition, the energy storage system calculates the minimum power P by formula (7): min-EES Thus, the difference of the peak power allowed by the grid connection point is compensated, and the minimum capacity W is calculated by formula (8): min-EES To provide capacity support:

[0109] P min-EES =P steady-peak-load -P steady-peak-pcc ...Formula (7);

[0110] W min-EES =(P steady-peak-load -P steady-peak-pcc )×t steady-peak-load

[0111] ...Formula (8).

[0112] The fifth working condition is the grid-connected point allowable steady-state peak power P steady-peak-pcc <Steady-state peak power P of the test platform steady-peak-load , the grid-connected point allows transient peak power P transient-peak-pcc ≥ Transient peak power P of the test platform transient-peak-load , and the maximum duration t of transient peak power allowed at the grid connection point transient-peak-pcc <The maximum duration of transient peak power of the test platform t transient-peak-load .

[0113] In the fifth working condition, the energy storage system calculates the minimum power P by formula (9): min-EES Thus, the power difference between the steady-state and transient peak values ​​at the grid connection point is compensated, and the minimum capacity W is calculated by formula (10): min-EES To provide capacity support:

[0114] P min-EES =P transient-peak-load -P steady-peak-pcc ...Formula (9);

[0115] W min-EES =(P transient-peak-load -P steady-peak-pcc )×(t transient-peak-load -t transient-peak-pcc )+

[0116] (P transient-peak-load -P transient-peak-pcc )×t transient-peak-pcc +(P steady-peak-load -P steady-peak-pcc)×t steady-peak-load

[0117] ...Formula (10).

[0118] The sixth working condition is the grid-connected point allowed steady-state peak power P steady-peak-pcc <Steady-state peak power P of the test platform steady-peak-load , the grid-connected point allows transient peak power P transient-peak-pcc <Transient peak power P of the test platform transient-peak-load , and the maximum duration t of transient peak power allowed at the grid connection point transient-peak-pcc ≥ Maximum duration of transient peak power of the test platform t transient-peak-load .

[0119] In the sixth working condition, the energy storage system selects the larger value as the minimum power P by comparing the calculations of equations (11) and (12). min-EES The difference between the transient peak power allowed by the grid connection point and the steady-state peak power allowed by the grid connection point, and the minimum capacity W is calculated by formula (13): min-EES To provide capacity support:

[0120] P min-EES =P transient-peak-load -P transient-peak-pcc ...Formula (11);

[0121] P min-EES =P steady-peak-load -P steady-peak-pcc ...Formula (12);

[0122] W min-EES =(P transient-peak-load -P transient-peak-pcc )×t transient-peak-load +(P steady-peak-load -P steady-peak-pcc )×t steady-peak-load

[0123] ...Formula (13).

[0124] The seventh working condition is the grid-connected point allowable steady-state peak power P steady-peak-pcc <Steady-state peak power P of the test platform steady-peak-load , the grid-connected point allows transient peak power P transient-peak-pcc <Transient peak power P of the test platform transient-peak-load , and the maximum duration t of transient peak power allowed at the grid connection point transient-peak-pcc <The maximum duration of transient peak power of the test platform t transient-peak-load .

[0125] In the seventh working condition, the energy storage system calculates the minimum power P by formula (14): min-EESIn this way, the difference between the transient peak power allowed at the grid connection point and the steady-state peak power allowed at the grid connection point is compensated, and the minimum capacity W is calculated by formula (15): min-EES To provide capacity support:

[0126] P min-EES =P transient-peak-load -P steady-peak-pcc ...Formula (14);

[0127] W min-EES =(P transient-peak-load -P transient-peak-pcc )×(t transient-peak-load -t transient-peak-pcc )+

[0128] (P transient-peak-load -P steady-peak-pcc )×t transient-peak-pcc +(P steady-peak-load -P steady-peak-pcc )×t steady-peak-load

[0129] ...Formula (15).

[0130] The segmented energy management of the energy storage system of the present invention is to adjust the load value of the test platform and the steady-state peak power P of the test platform in different working conditions. steady-peak-load The peak power P allowed at the grid connection point steady-peak-pcc The relationship between the time of the test platform load value and the maximum duration t of the transient peak power of the test platform transient-peak-load The relationship between them corresponds to the operating power of the energy storage system.

[0131] In the first case:

[0132] Test platform load value P load (t) exceeds the grid-connected point allowable steady-state peak power P steady-peak-pcc , and the duration t is greater than the maximum duration t of the transient peak power allowed at the grid connection point transient-peak-pcc When , the energy storage system operates according to the power P1, and the power P1 is obtained by formula (16), otherwise the energy storage system is in standby mode and the power is 0; the power operation function P of the energy storage system in the second working condition is EES (t) is shown in formula (17):

[0133] P1=P transient-peak-load -P steady-peak-pcc ...Formula (16);

[0134]

[0135] In the second case:

[0136] When the test platform load value Pload (t) Exceeds the transient peak power P allowed at the grid connection point transient-peak-pcc , the energy storage system operates at power P2, which is obtained by formula (18), otherwise the energy storage system is in standby mode and the power is 0; the power operation function P of the energy storage system in the second working condition is EES (t) is shown in formula (19):

[0137] P2=P transient-peak-load -P transient-peak-pcc ...Formula (18);

[0138]

[0139] In the third case:

[0140] When the test platform load value P load (t) exceeds the grid-connected point allowable steady-state peak power P steady-peak-pcc When the duration t is greater than the maximum duration t of the transient peak power allowed at the grid connection point transient-peak-pcc When the load value of the test platform is P load (t) exceeds the grid-connected point allowable steady-state peak power P steady-peak-pcc When the duration t is less than the maximum duration t of transient peak power allowed at the grid connection point transient-peak-pcc When the energy storage system operates at power P2; otherwise, the energy storage system is in standby mode and the power is 0; the power operation function P of the energy storage system in the third operating condition is EES (t) is shown in formula (20):

[0141]

[0142] In the fourth case:

[0143] When the test platform load value P load (t) exceeds the grid-connected point allowable steady-state peak power P steady-peak-pcc But it does not exceed the steady-state peak power P of the test platform steady-peak-load When , the energy storage system in the fourth working condition operates at power P3, which is obtained by formula (21); otherwise, the energy storage system is in standby mode and the power is 0; the power operation function P of the energy storage system in the fourth working condition is EES (t) is shown in formula (22):

[0144] P3=P steady-peak-load -P steady-peak-pcc ...Formula (21);

[0145]

[0146] In the fifth case:

[0147] When the test platform load value P load (t) exceeds the grid-connected point allowable steady-state peak power P steady-peak-pcc But it does not exceed the steady-state peak power P of the test platform steady-peak-load When the load value of the test platform is P load (t) exceeds the steady-state peak power P of the test platform steady-peak-load , and the duration t is less than the maximum duration t of the transient peak power allowed at the grid connection point transient-peak-pcc When the load value of the test platform is P load (t) exceeds the steady-state peak power P of the test platform steady-peak-load , and the duration t is greater than the maximum duration t of the transient peak power allowed at the grid connection point transient-peak-pcc When , the energy storage system in the fifth working condition operates according to the power of P1; otherwise, the energy storage system is in standby mode and the power is 0; the power operation function of the energy storage system in the fifth working condition is P EES (t) is shown in formula (23):

[0148]

[0149] In the sixth case:

[0150] When the test platform load value P load (t) The allowed steady-state peak power P at the grid connection point steady-peak-pcc But it is less than the steady-state peak power P of the test platform steady-peak-load When the load value of the test platform is P load (t) exceeds the steady-state peak power P of the test platform steady-peak-load When the sixth working condition energy storage system operates at P2 power; otherwise, the energy storage system is in standby mode and the power is 0; the power operation function P of the energy storage system in the sixth working condition EES (t) is shown in formula (24):

[0151]

[0152] In the seventh case:

[0153] When the test platform load value P load (T) exceeds the grid-connected point allowable steady-state peak power P steady-peak-pcc But it is less than the steady-state peak power P of the test platform steady-peak-load When the load value of the test platform is P load (t) exceeds the steady-state peak power P of the test platform steady-peak-load , and the duration t is less than the maximum duration t of the transient peak power allowed at the grid connection point transient-peak-pccWhen the load value of the test platform is P load (t) exceeds the steady-state peak power P of the test platform steady-peak-load , and the duration t is greater than the maximum duration t of the transient peak power allowed at the grid connection point transient-peak-pcc When , the energy storage system of the seventh working condition operates at P1 power; otherwise, the energy storage system is in standby mode and the power is 0; the power operation function P of the energy storage system of the seventh working condition EES (t) is shown in formula (25):

[0154]

[0155] The configuration and energy management method of the energy storage power test platform can economically and effectively solve the problem of excessive power level of electrical equipment testing but limited capacity of the grid connection point. This method is also applicable to working conditions where the load has predictable, plannable, adjustable and controllable characteristics, such as charging stations, electrified smart buildings and parks, and other power consumption scenarios with increased capacity demand.

[0156] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A configuration and energy management method of an energy storage power test platform, characterized in that: The corresponding operating conditions are determined according to the relationship between the transient load characteristics of the power test platform, the steady-state load characteristics of the power test platform, the transient power characteristics allowed by the grid connection point, and the steady-state power characteristics allowed by the grid connection point. Then, the corresponding minimum power and the corresponding minimum capacity of the energy storage system are calculated according to the corresponding operating conditions, so as to adapt to different energy storage system configurations. At the same time, in different operating conditions, the corresponding operating power of the energy storage system is determined according to the relationship between the load value of the test platform and the steady-state load characteristics of the power test platform, the transient power characteristics allowed by the grid connection point, and the steady-state power characteristics allowed by the grid connection point, so as to perform segmented energy management of the energy storage system.

2. The configuration and energy management method of the energy storage power test platform according to claim 1, characterized in that: The transient load characteristic of the power test platform is the transient peak power P of the power test platform. transient-peak-load The maximum duration of transient peak power of the power test platform t transient-peak-load ; The steady-state load characteristic of the power test platform is the steady-state peak power P of the power test platform. steady-peak-load The maximum duration of peak power of the power test platform is t steady-peak-load ; The grid-connected point allowable transient power characteristic is the grid-connected point allowable transient peak power P transient-peak-pcc The maximum duration t of transient peak power allowed at the grid connection point transient-peak-pcc ; The grid-connected point allowable steady-state power characteristic is the grid-connected point allowable steady-state peak power P steady-peak-pcc .

3. The configuration and energy management method of the energy storage power test platform according to claim 2, characterized in that: The transient peak power P of the test platform transient-peak-load Greater than the steady-state peak power P of the test platform steady-peak-load .

4. The configuration and energy management method of the energy storage power test platform according to claim 3, characterized in that: According to the test platform steady-state peak power P steady-peak-load The peak power P allowed at the grid connection point steady-peak-pcc The relationship between the transient peak power P of the test platform transient-peak-load The transient peak power P allowed at the grid connection point transient-peak-pcc The relationship between the maximum duration t of the transient peak power allowed at the grid connection point transient-peak-pcc The maximum duration t of the transient peak power of the test platform transient-peak-load The relationship between them jointly determines the working condition, and then calculates and configures the minimum power P of the energy storage system in the corresponding working condition. min-EES and configure the minimum capacity W of the energy storage system min-EES , thus adapting to different energy storage system configurations.

5. The configuration and energy management method of the energy storage power test platform according to claim 4, characterized in that: The working conditions include 7 types, namely the first working condition, the second working condition, the third working condition, the fourth working condition, the fifth working condition, the sixth working condition and the seventh working condition; The first working condition is that the grid connection point allows a steady-state peak power P transient-peak-pcc ≥ Steady-state peak power P of the test platform steady-peak-load , the grid-connected point allows transient peak power P transient-peak-pcc ≥ Transient peak power P of the test platform transient-peak-load , and the maximum duration t of transient peak power allowed at the grid connection point transient-peak-pcc <The maximum duration of transient peak power of the test platform t transient-peak-load ; The second working condition is that the grid connection point allows a steady-state peak power P steady-peak-pcc ≥ Steady-state peak power P of the test platform steady-peak-load , the grid-connected point allows transient peak power P transient-peak-pcc <Transient peak power P of the test platform transient-peak-load , and the maximum duration t of transient peak power allowed at the grid connection point transient-peak-pcc ≥ Maximum duration of transient peak power of the test platform t transient-peak-load ; The third working condition is that the grid connection point allows a steady-state peak power P steady-peak-pcc ≥ Steady-state peak power P of the test platform steady-peak-load , the grid-connected point allows transient peak power P transient-peak-pcc <Transient peak power P of the test platform transient-peak-load , and the maximum duration t of transient peak power allowed at the grid connection point transient-peak-pcc <The maximum duration of transient peak power of the test platform t transient-peak-load ; The fourth working condition is that the grid connection point allows a steady-state peak power P steady-peak-pcc <Steady-state peak power P of the test platform steady-peak-load , the grid-connected point allows transient peak power P transient-peak-pcc ≥ Transient peak power P of the test platform transient-peak-load , and the maximum duration t of transient peak power allowed at the grid connection point transient-peak-pcc ≥ Maximum duration of transient peak power of the test platform t transient-peak-load ; The fifth working condition is that the grid connection point allows a steady-state peak power P steady-peak-pcc <Steady-state peak power P of the test platform steady-peak-load , the grid-connected point allows transient peak power P transient-peak-pcc ≥ Transient peak power P of the test platform transient-peak-load , and the maximum duration t of transient peak power allowed at the grid connection point transient-peak-pcc <The maximum duration of transient peak power of the test platform t transient-peak-load ; The sixth working condition is that the grid connection point allows a steady-state peak power P steady-peak-pcc <Steady-state peak power P of the test platform steady-peak-load , the grid-connected point allows transient peak power P transient-peak-pcc <Transient peak power P of the test platform transient-peak-load , and the maximum duration t of transient peak power allowed at the grid connection point transient-peak-pcc ≥ Maximum duration of transient peak power of the test platform t transient-peak-load ; The seventh working condition is that the grid connection point allows the steady-state peak power P steady-peak-pcc <Steady-state peak power P of the test platform steady-peak-load , the grid-connected point allows transient peak power P transient-peak-pcc <Transient peak power P of the test platform transient-peak-load , and the maximum duration t of transient peak power allowed at the grid connection point transient-peak-pcc <The maximum duration of transient peak power of the test platform t transient-peak-load .

6. The configuration and energy management method of the energy storage power test platform according to claim 5, characterized in that: In the first working condition, the energy storage system calculates the minimum power P by formula (1): min-EES Thus, the power difference exceeding the transient peak power of the grid connection point outside the allowed time is compensated, and the minimum capacity W is calculated by formula (2) min-EES To provide capacity support: P min-EES =P transient-peak-load -P steady-peak-pcc ...Formula (1); W min-EES =(P transient-peak-load -P steady-peak-pcc )×(t transient-peak-load -t transient-peak-pcc )……Formula (2); In the second working condition, the energy storage system calculates the minimum power P by formula (3): min-EES In this way, the difference between the transient peak power allowed by the grid connection point is compensated, and the minimum capacity W is calculated by formula (4): min-EES To provide capacity support: P min-EES =P transient-peak-load -P transient-peak-pcc ...Formula (3); W min-EES =(P transient-peak-load -P transient-peak-pcc )×t transient-peak-load ...Formula (4); In the third working condition, the energy storage system calculates the minimum power P by formula (5): min-EES Thus, the difference between the transient peak power allowed at the grid connection point and the steady peak power allowed at the grid connection point is compensated, and the minimum capacity W is calculated by formula (6): min-EES To provide capacity support: P min-EES =P transient-peak-load -P steady-peak-pcc ……Formula (5) W min-EES =(P transient-peak-load -P transient-peak-pcc )×(t transient-peak-load -t transient-peak-pcc )+(P transient-peak-load -P steady-peak-pcc )×t transient-peak-pcc ...Formula (6)); In the fourth working condition, the energy storage system calculates the minimum power P by formula (7): min-EES Thus, the difference of the peak power allowed by the grid connection point is compensated, and the minimum capacity W is calculated by formula (8): min-EES To provide capacity support: P min-EES =P steady-peak-load -P steady-peak-pcc ...Formula (7); W min-EES =(P steady-peak-load -P steady-peak-pcc )×t steady-peak-load ...Formula (8); In the fifth working condition, the energy storage system calculates the minimum power P by formula (9): min-EES Thus, the power difference between the steady-state and transient peak values ​​at the grid connection point is compensated, and the minimum capacity W is calculated by formula (10): min-EES To provide capacity support: P min-EES =P transient-peak-load -P steady-peak-pcc ...Formula (9); W min-EES =(P transient-peak-load -P steady-peak-pcc )×(t transient-peak-load -t transient-peak-pcc )+(P transient-peak-load -P transient-peak-pcc )×t transient-peak-pcc +(P steady-peak-load -P steady-peak-pcc )×t steady-peak-load ...Formula (10); In the sixth working condition, the energy storage system selects the larger value as the minimum power P by comparing the calculations of equations (11) and (12). min-EES The difference between the transient peak power allowed by the grid connection point and the steady-state peak power allowed by the grid connection point, and the minimum capacity W is calculated by formula (13): min-EES To provide capacity support: P min-EES =P transient-peak-load -P transient-peak-pcc ...Formula (11); P min-EES =P steady-peak-load -P steady-peak-pcc ...Formula (12); W min-EES =(P transient-peak-load -P transient-peak-pcc )×t transient-peak-load +(P steady-peak-load -P steady-peak-pcc )×t steady-peak-load ...Formula (13); In the seventh working condition, the energy storage system calculates the minimum power P by formula (14): min-EES In this way, the difference between the transient peak power allowed at the grid connection point and the steady-state peak power allowed at the grid connection point is compensated, and the minimum capacity W is calculated by formula (15): min-EES To provide capacity support: P min-EES =P transient-peak-load -P steady-peak-pcc ...Formula (14); W min-EES =(P transient-peak-load -P transient-peak-pcc )×(t transient-peak-load -t transient-peak-pcc )+ (P transient-peak-load -P steady-peak-pcc )×t transient-peak-pcc +(P steady-peak-load -P steady-peak-pcc )×t steady-peak-load ...Formula (15).

7. The configuration and energy management method of the energy storage power test platform according to claim 6, characterized in that: In the first working condition, the allowed time is the maximum duration of the peak power of the power test platform t steady-peak-load Maximum duration t of transient peak power allowed at the grid connection point transient-peak-pcc The difference.

8. The configuration and energy management method of the energy storage power test platform according to claim 7, characterized in that: The segmented energy management of the energy storage system is based on the load value of the test platform and the steady-state peak power P of the test platform under different working conditions. steady-peak-load and the grid-connected point allows steady-state peak power P steady-peak-pcc The relationship between the time of the test platform load value and the maximum duration t of the transient peak power of the test platform transient-peak-load The relationship between them corresponds to selecting the operating power of the energy storage system.

9. The configuration and energy management method of the energy storage power test platform according to claim 8, characterized in that: In the first working condition: Test platform load value P load (t) exceeds the grid-connected point allowable steady-state peak power P steady-peak-pcc , and the duration t is greater than the maximum duration t of the transient peak power allowed at the grid connection point transient-peak-pcc When the energy storage system operates according to the power P1, the power P1 is obtained by formula (16), otherwise the energy storage system is in standby mode and the power is 0; wherein the power operation function P of the energy storage system in the second working condition EES (t) is shown in formula (17): P1=P transient-peak-load -P steady-peak-pcc ...Formula (16); In the second working condition: When the test platform load value P load (t) Exceeds the transient peak power P allowed at the grid connection point transient-peak-pcc , the energy storage system operates according to power P2, and power P2 is obtained by formula (18), otherwise the energy storage system is in standby mode and the power is 0; wherein the power operation function P of the energy storage system in the second working condition EES (t) is shown in formula (19): P2=P transient-peak-load -P transient-peak-pcc ...Formula (18); In the third working condition: When the test platform load value P load (t) exceeds the grid-connected point allowable steady-state peak power P steady-peak-pcc When the duration t is greater than the maximum duration t of the transient peak power allowed at the grid connection point transient-peak-pcc When the load value of the test platform is P load (t) exceeds the grid-connected point allowable steady-state peak power P steady-peak-pcc When the duration t is less than the maximum duration t of transient peak power allowed at the grid connection point transient-peak-pcc When the energy storage system is in standby mode, the power is P2; otherwise, the energy storage system is in standby mode and the power is 0; wherein the power operation function P of the energy storage system in the third working condition EES (t) is shown in formula (20): In the fourth working condition: When the test platform load value P load (t) exceeds the grid-connected point allowable steady-state peak power P steady-peak-pcc But it does not exceed the steady-state peak power P of the test platform steady-peak-load When , the energy storage system in the fourth working condition operates at power P3, and power P3 is obtained by formula (21); Otherwise, the energy storage system is in standby mode and the power is 0; the power operation function P of the energy storage system in the fourth working condition is EES (t) is shown in formula (22): P3=P steady-peak-load -P steady-peak-pcc ...Formula (21); In the fifth working condition: When the test platform load value P load (t) exceeds the grid-connected point allowable steady-state peak power P steady-peak-pcc But it does not exceed the steady-state peak power P of the test platform steady-peak-load When the load value of the test platform is P load (t) exceeds the steady-state peak power P of the test platform steady-peak-load , and the duration t is less than the maximum duration t of the transient peak power allowed at the grid connection point transient-peak-pcc When the load value of the test platform is P loal (t) exceeds the steady-state peak power P of the test platform steady-peak-load , and the duration t is greater than the maximum duration t of the transient peak power allowed at the grid connection point transient-peak-pcc When the energy storage system in the fifth working condition operates at the power of P1; otherwise, the energy storage system is in standby mode and the power is 0; the power operation function P of the energy storage system in the fifth working condition EES (t) is shown in formula (23): In the sixth working condition: When the test platform load value P load (t) Allowable steady-state peak power P across the grid connection point steady-peak-pcc But it is less than the steady-state peak power P of the test platform steady-peak-load When the load value of the test platform is P load (t) exceeds the steady-state peak power P of the test platform steady-peak-load When the sixth working condition energy storage system operates at P2 power; otherwise, the energy storage system is in standby mode and the power is 0; the power operation function P of the energy storage system in the sixth working condition EES (t) is shown in formula (24): In the seventh working condition: When the test platform load value P load (t) exceeds the grid-connected point allowable steady-state peak power P steady-peak-pcc But it is less than the steady-state peak power P of the test platform steady-peak-load When the energy storage system of the seventh working condition operates at power P3; when the load value of the test platform is P load (t) exceeds the steady-state peak power P of the test platform steady-peak-load , and the duration t is less than the maximum duration t of the transient peak power allowed at the grid connection point transient-peak-pcc When the load value of the test platform is P load (t) exceeds the steady-state peak power P of the test platform steady-peak-load , and the duration t is greater than the maximum duration t of the transient peak power allowed at the grid connection point transient-peak-pcc When the energy storage system in the seventh working condition operates at P1 power; otherwise, the energy storage system is in standby mode and the power is 0; the power operation function P of the energy storage system in the seventh working condition EES (t) is shown in formula (25):

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