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

Abstract

A configuration and energy management method of an energy storage type power test platform, 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 allowable transient power characteristics of the grid connection point and the allowable steady-state power characteristics of the grid connection point, the corresponding working condition is determined, and then the corresponding minimum power and the corresponding minimum capacity of the energy storage system are calculated according to the corresponding working condition, so as to adapt to different energy storage system configurations; at the same time, in different working conditions, according to the test platform load value and according to the relationship between the steady-state load characteristics of the power test platform, the allowable transient power characteristics of the grid connection point and the allowable steady-state power characteristics of the grid connection point. The method effectively solves the problem that the power grade of electrical equipment test is too large but the capacity of the grid connection point is limited. The method is also applicable to working conditions with predictable, planable, adjustable and controllable characteristics, such as charging stations, electrified intelligent buildings and park capacity expansion demand power scenes.

Description

TECHNICAL FIELD

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

[0002] The power test platform of electrical equipment is divided into two types: type I is a circulating type, that is, a test platform is connected to one public grid connection point to provide input and output side test interfaces for test equipment; type II is a direct grid connection type, that is, a test platform is connected to one public grid connection point to input power, and provides one output side test interface for test equipment. The required grid capacity of type I is the loss of test equipment and the equipment to be tested, which is usually 15% of the capacity of test equipment, and the required grid capacity of type II is 130% of the capacity of test equipment. With the increasing power level of electrical equipment, especially the testing demand of MW-level equipment, the user-side grid cannot meet the capacity demand of the test platform, and port expansion and equipment modification are not economical and implementable.

[0003] Therefore, in view of the deficiencies of the prior art, it is very necessary to provide a configuration and energy management method of an energy storage type power test platform to solve the deficiencies of the prior art. SUMMARY

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

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

[0006] A configuration and energy management method of an energy storage type power test platform is provided, the corresponding working condition is determined according to the relationship between the transient load characteristics of the power test platform, the steady load characteristics of the power test platform, the transient power characteristics allowed by the grid connection point and the steady 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 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 test platform load value and the transient load characteristics of the power test platform, the steady load characteristics of the power test platform, the transient power characteristics allowed by the grid connection point and the steady power characteristics allowed by the grid connection point, so as to carry out segmented energy management of the energy storage system.

[0007] Preferably, the transient load characteristics of the power test platform are the transient peak power P transient-peak-load and the maximum duration of transient peak power t transient-peak-load .

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

[0009] Preferably, the transient power characteristic of the grid connection point is a transient peak power P transient-peak-pcc and a transient peak power maximum duration t transient-peak-pcc .

[0010] Preferably, the steady-state power characteristic of the grid connection point is a steady-state peak power P steady-peak-pcc .

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

[0012] The configuration and energy management method of the energy storage type power test platform of the present application are determined according to the relationship between the steady-state peak power P steady-peak-load of the test platform and the steady-state peak power P steady-peak-pcc of the grid connection point, the relationship between the transient peak power P transient-peak-load of the test platform and the transient peak power P transient-peak-pcc of the grid connection point, and the relationship between the transient peak power maximum duration t transient-peak-pcc of the grid connection point and the transient peak power maximum duration t transient-peak-load of the test platform, and then the minimum power P min-EES and the minimum capacity W min-EES of the energy storage system are calculated and configured according to the corresponding calculation in the corresponding working condition, so as to adapt to different energy storage system configurations.

[0013] Preferably, the working condition includes seven kinds, 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.

[0014] Preferably, the first working condition is P transient-peak-pcc ≥ P steady-peak-load , P transient-peak-pcc ≥ P transient-peak-load , and t transient-peak-pcc < t transient-peak-load .

[0015] Preferably, the second working condition is P steady-peak-pcc≥ steady state peak power P of the test platform steady-peak-load ≤ transient peak power P allowed at the point of interconnection transient-peak-pcc ≤ transient peak power P of the test platform transient-peak-load ≤ maximum duration t of transient peak power allowed at the point of interconnection transient-peak-pcc ≤ maximum duration t of transient peak power of the test platform transient-peak-load .

[0016] Preferably, the third operating condition is that the point of interconnection allows a steady state peak power P steady-peak-pcc ≥ steady state peak power P of the test platform steady-peak-load ≤ transient peak power P allowed at the point of interconnection transient-peak-pcc ≤ transient peak power P of the test platform transient-peak-load ≤ maximum duration t of transient peak power allowed at the point of interconnection transient-peak-pcc ≤ maximum duration t of transient peak power of the test platform transient-peak-load .

[0017] Preferably, the fourth operating condition is that the point of interconnection allows a steady state peak power P steady-peak-pcc ≤ steady state peak power P of the test platform steady-peak-load ≤ transient peak power P allowed at the point of interconnection transient-peak-pcc ≥ transient peak power P of the test platform transient-peak-load ≤ maximum duration t of transient peak power allowed at the point of interconnection transient-peak-pcc ≥ maximum duration t of transient peak power of the test platform transient-peak-load .

[0018] Preferably, the fifth operating condition is that the point of interconnection allows a steady state peak power P steady-peak-pcc ≤ steady state peak power P of the test platform steady-peak-load ≤ transient peak power P allowed at the point of interconnection transient-peak-pcc ≥ transient peak power P of the test platform transient-peak-load ≤ maximum duration t of transient peak power allowed at the point of interconnection transient-peak-pcc ≤ maximum duration t of transient peak power of the test platform transient-peak-load .

[0019] Preferably, the sixth operating condition is that the point of interconnection allows a steady state peak power P steady-peak-pcc ≤ steady state peak power P of the test platform steady-peak-load ≤ transient peak power P allowed at the point of interconnection transient-peak-pcc ≤ transient peak power P of the test platform transient-peak-load ≤ maximum duration t of transient peak power allowed at the point of interconnection transient-peak-pcc ≥ maximum duration t of transient peak power of the test platform transient-peak-load .

[0020] Preferably, the above-mentioned seventh operating condition is that the grid point allows a steady state peak power P steady-peak-pcc <Steady state peak power P of the test platform steady-peak-load and the grid point allows a transient peak power P transient-peak-pcc <Transient peak power P of the test platform transient-peak-load and the grid point allows a transient peak power maximum duration t transient-peak-pcc <Transient peak power maximum duration t of the test platform transient-peak-load .

[0021] In the first operating condition, the energy storage system calculates a minimum power P min-EES to compensate for the power difference beyond the allowed time of the grid point transient peak power, and a minimum capacity W min-EES to provide capacity support:

[0022] P min-EES = P transient-peak-load -P steady-peak-pcc …Equation (1); W min-EES = (P transient-peak-load -P steady-peak-pcc ) x (t transient-peak-load -t transient-peak-pcc )

[0023] …Equation (2).

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

[0025] In the second operating condition, the energy storage system calculates a minimum power P min-EES to compensate for the difference between the grid point allowed transient peak power and the power test platform peak power, and a minimum capacity W min-EES to provide capacity support:

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

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

[0028] …Equation (4).

[0029] In the third operating condition, the energy storage system calculates a minimum power P min-EESto compensate for the difference over the grid point allowed transient peak power and the grid point allowed steady state peak power, and the minimum capacity W calculated by equation (6) min-EES to provide capacity support:

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

[0031] W min-EES = (P transient-peak-load -P transient-peak-pcc ) x (t transient-peak-load -t transient-peak-pcc ) + … equation (6)

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

[0033] … equation (6).

[0034] In the fourth working condition, the energy storage system calculates the minimum power P min-EES to compensate for the difference over the grid point allowed steady state peak power, and the minimum capacity W calculated by equation (8) min-EES to provide capacity support:

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

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

[0037] … equation (8).

[0038] In the fifth working condition, the energy storage system calculates the minimum power P min-EES to compensate for the difference over the grid point allowed steady state and transient peak power, and the minimum capacity W calculated by equation (10) min-EES to provide capacity support:

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

[0040] W min-EES = (P transient-peak-load -P steady-peak-pcc ) x (t transient-peak-load -t transient-peak-pcc ) + … equation (10)

[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] … Equation (10).

[0043] In the sixth operating condition, the energy storage system selects the greater value as the minimum power P min-EES from the comparison of Equation (11) and Equation (12) to provide capacity support: min-EES

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

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

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

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

[0048] … Equation (13).

[0049] In the seventh operating condition, the energy storage system calculates the minimum power P min-EES from Equation (14) to compensate for the difference between the grid point allowed transient peak power and the grid point allowed steady state peak power, and calculates the minimum capacity W min-EES from Equation (15) to provide capacity support:

[0050] P min-EES = P transient-peak-load -P steady-peak-pcc … Equation (14); W min-EES = (P transient-peak-load -P transient-peak-pcc ) x (t transient-peak-load -t transient-peak-pcc )+

[0051] (P transient-peak-load -P steady-peak-pcc ) x 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 above-mentioned 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 operating conditions. steady-peak-load And the grid connection 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 determines the operating power of the energy storage system.

[0054] In the first operating condition:

[0055] Test platform load value P lasd (t) Exceeds the allowable steady-state peak power P at the grid connection point steady-peak-pcc And the duration t is greater than the maximum duration t allowed by the grid connection point for transient peak power. transient-peak-pcc When the energy storage system operates at power P1, which is obtained through equation (16), the energy storage system is in standby mode with a power of 0. The power operation function P of the energy storage system in the second operating condition is... EES (t) is shown in equation (17):

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

[0057]

[0058] In the second operating condition:

[0059] When the test platform load value P load (t) Exceeds the allowable transient peak power P at the grid connection point transient-peak-pcc The energy storage system operates at power P2, which is obtained through equation (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 operating condition is... EES (t) is shown in equation (19):

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

[0061]

[0062] In the third operating condition:

[0063] When the test platform load value Pload (t) exceeds the steady state peak power P allowed by the grid point steady-peak-pcc and the duration t is greater than the maximum duration t of transient peak power allowed by the grid point transient-peak-pcc , the energy storage system operates at power P1 ; when the test platform load value P load (t) exceeds the steady state peak power P allowed by the grid point steady-peak-pcc and the duration t is less than the maximum duration t of transient peak power allowed by the grid point transient-peak-pcc , the energy storage system operates at power P2; otherwise the energy storage system is in standby and the power is 0; wherein the power operating function P EES (t) of the energy storage system of the third operating condition is given by equation (20):

[0064]

[0065] In the fourth operating condition:

[0066] when the test platform load value P load (t) exceeds the steady state peak power P allowed by the grid point steady-peak-pcc but does not exceed the test platform steady state peak power P steady-peak-load , the energy storage system of the fourth operating condition operates at power P3, which is given by equation (21); otherwise the energy storage system is in standby and the power is 0; the power operating function P EES (t) of the energy storage system of the fourth operating condition is given by equation (22):

[0067] P3 = P steady-peak-load - P steady-peak-pcc … equation (21);

[0068]

[0069] In the fifth operating condition:

[0070] when the test platform load value P load (t) exceeds the steady state peak power P allowed by the grid point steady-peak-pcc but does not exceed the test platform steady state peak power P steady-peak-load , the energy storage system of the fifth operating condition operates at power P3; when the test platform load value P load (t) exceeds the test platform steady state peak power P steady-peak-load and the duration t is less than the maximum duration t of transient peak power allowed by the grid point transient-peak-pcc , the energy storage system of the fifth operating condition operates at P2 power; when the test platform load value P load (t) exceeds the test platform steady state peak power P steady-peak-loadand the duration t is greater than the maximum duration t of transient peak power allowed by the grid point transient-peak-pcc The energy storage system of the fifth working condition operates at power P1; otherwise the energy storage system is on standby and the power is 0; the power operation function P of the energy storage system of the fifth working condition is as shown in formula (23) EES (t) is as shown in formula (23)

[0071]

[0072] In the sixth working condition:

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

[0074]

[0075] In the seventh working condition:

[0076] When the test platform load value P load (t) exceeds the steady-state peak power P allowed by the grid point steady-peak-pcc but is less than the steady-state peak power P of the test platform steady-peak-load , the energy storage system of the seventh working condition operates at power P3; when the test platform load value 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 transient peak power allowed by the grid point transient-peak-pcc , the energy storage system of the seventh working condition operates at power P2; when the test platform load value 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 transient peak power allowed by the grid point transient-peak-pcc , the energy storage system of the seventh working condition operates at power P1; otherwise the energy storage system is on standby and the power is 0; the power operation function P of the energy storage system of the seventh working condition is as shown in formula (25) EES (t) is as shown in formula (25)

[0077]

[0078] The configuration and energy management method of the energy storage type power test platform of the present application 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 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 test platform load value and the relationship between 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 carry out the segmented energy management of the energy storage system. As the power level of electrical equipment is getting larger and larger, especially the testing demand of MW-level equipment, the user-side power grid cannot meet the capacity demand of the test platform, and port expansion and equipment modification are not economical and implementable. The configuration and energy management method of the energy storage type power test platform of the present application can economically and effectively solve the problem of too large power level of electrical equipment test but limited capacity of the grid connection point. This method is also applicable to working conditions with predictable, planable, adjustable and controllable characteristics, such as charging stations, electrified intelligent buildings and park capacity expansion demand power consumption scenarios. BRIEF DESCRIPTION OF DRAWINGS

[0079] The present application is further illustrated by the accompanying drawings, but the contents in the drawings do not constitute any limitation on the present application.

[0080] Figure 1 The flowchart of the configuration and energy management method of the energy storage type power test platform.

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

[0082] The technical solutions of the present application are further illustrated by the following examples.

[0083] Example 1

[0084] The configuration and energy management method of the energy storage type power test platform, as shown in Figure 1, the transient load characteristics of the power test platform, the steady-state load characteristics of the power test platform, the relationship between the transient power characteristics allowed by the grid connection point and the steady-state power characteristics allowed by the grid connection point, and then according to the corresponding working condition, the corresponding minimum power and the corresponding minimum capacity of the energy storage system are calculated, 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 test platform load value and the relationship between 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 carry out the segmented energy management of the energy storage system. The application scenario of the energy storage type power test platform of the application is as follows Figure 2 , including energy storage system equipment, electrical equipment power test platform equipment and grid connection point public bus connected in parallel. The test platform load value is also called test platform real-time value.

[0085] The transient load characteristics of the power test platform are the transient peak power P transient-peak-load and the maximum duration t transient-peak-load of the transient peak power of the power test platform. steady-peak-load The steady-state load characteristics of the power test platform are the steady-state peak power P steady-peak-load and the maximum duration t transient-peak-load of the peak power of the power test platform. steady-peak-load .

[0086] The transient power characteristics allowed by the grid connection point are the transient peak power P transient-peak-pcc and the maximum duration t transient-peak-pcc of the transient peak power allowed by the grid connection point.

[0087] The steady-state power characteristics allowed by the grid connection point are the steady-state peak power P steady-peak-pcc allowed by the grid connection point.

[0088] The configuration and energy management method of the energy storage type power test platform of the application are determined according to the relationship between the test platform steady-state peak power P steady-peak-load and the grid connection point allowed steady-state peak power P steady-peak-pcc , the relationship between the test platform transient peak power P transient-peak-load and the grid connection point allowed transient peak power P transient-peak-pcc , and the relationship between the maximum duration t transient-peak-pcc of the transient peak power allowed by the grid connection point and the maximum duration t transient-peak-load of the transient peak power of the test platform, and then the minimum power P min-EES and the minimum capacity W min-EES of the energy storage system are calculated and configured according to the corresponding working condition, so as to adapt to different energy storage system configurations.

[0089] The working conditions include seven conditions, which are first working condition, second working condition, third working condition, fourth working condition, fifth working condition, sixth working condition and seventh working condition.

[0090] The first working condition is that the steady-state peak power P transient-peak-pcc of the grid-connected point is greater than or equal to the steady-state peak power P steady-peak-load of the test platform. transient-peak-pcc

[0091] The transient peak power P transient-peak-load of the grid-connected point is less than the transient peak power P transient-peak-pcc of the test platform. transient-peak-load In the first working condition, the minimum power P min-EES of the energy storage system is calculated by formula (1) so as to compensate for the power difference exceeding the transient peak power of the grid-connected point in the allowable time, and the minimum capacity W min-EES is calculated by formula (2) 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 allowable time outside is the difference between the peak power maximum duration t steady-peak-load of the power test platform and the transient peak power maximum duration t transient-peak-pcc of the grid-connected point.

[0095] The second working condition is that the steady-state peak power P steady-peak-pcc of the grid-connected point is greater than or equal to the steady-state peak power P steady-peak-load of the test platform, the transient peak power P transient-peak-pcc of the grid-connected point is less than

[0096] the transient peak power P transient-peak-load of the test platform, and the transient peak power maximum duration t transient-peak-pcc of the grid-connected point is greater than or equal to the transient peak power maximum duration t transient-peak-load of the test platform.

[0097] In the second working condition, the minimum power P min-EESThis compensates for the difference between the allowable transient peak power at the grid connection point and the minimum capacity W calculated by equation (4). min-EES To provide capacity support:

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

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

[0100] ...Equation (4).

[0101] The third operating condition is the allowable steady-state peak power P at the grid connection point. steady-peak-pcc ≥ Steady-state peak power P of the test platform steady-peak-load The grid connection point allows for 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 t of transient peak power of the test platform transient-peak-load .

[0102] In the third operating condition, the minimum power P of the energy storage system is calculated using equation (5). min-EES This compensates for the difference between the allowable transient peak power and the allowable steady-state peak power at the grid connection point, and calculates the minimum capacity W using equation (6). min-EES To provide capacity support:

[0103] P min-EES =P transient-peak-load -P steady-peak-pcc ...Equation (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] ...Equation (6).

[0107] The fourth operating condition is the allowable steady-state peak power P at the grid connection point. steady-peak-pcc <Steady-state peak power P of the test platform steady-peak-load The grid connection point allows for 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 t of transient peak power of the test platform transient-peak-load .

[0108] In the fourth operating condition, the minimum power P of the energy storage system is calculated using equation (7). min-EES This compensates for the difference exceeding the allowable steady-state peak power at the grid connection point, and calculates the minimum capacity W using equation (8). min-EES To provide capacity support:

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

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

[0111] ...Equation (8).

[0112] The fifth operating condition is the allowable steady-state peak power P at the grid connection point. steady-peak-pcc <Steady-state peak power P of the test platform steady-peak-load The grid connection point allows for 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 t of transient peak power of the test platform transient-peak-load .

[0113] In the fifth operating condition, the minimum power P of the energy storage system is calculated using equation (9). min-EES This compensates for the power difference exceeding the steady-state and transient peak values ​​at the grid connection point, and calculates the minimum capacity W using equation (10). min-EES To provide capacity support:

[0114] P min-EES =P transient-peak-load -P steady-peak-pcc ...Equation (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) x t steady-peak-load

[0117] … Equation (10).

[0118] The sixth operating condition is that the grid point allows steady-state peak power P steady-peak-pcc < Steady-state peak power P of the test platform steady-peak-load , the grid 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 the grid point allowing transient peak power transient-peak-pcc ≥ Transient peak power maximum duration t of the test platform transient-peak-load .

[0119] In the sixth operating condition, the energy storage system selects the larger value as the minimum power P min-EES from the comparison of the calculation of Equation (11) and Equation (12), so that the difference between the grid point allowing transient peak power and the grid point allowing steady-state peak power, and the minimum capacity W min-EES calculated by Equation (13) to provide capacity support:

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

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

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

[0123] … Equation (13).

[0124] The seventh operating condition is that the grid point allows steady-state peak power P steady-peak-pcc < Steady-state peak power P of the test platform steady-peak-load , the grid 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 the grid point allowing transient peak power transient-peak-pcc < Transient peak power maximum duration t of the test platform transient-peak-load .

[0125] In the seventh operating condition, the energy storage system calculates the minimum power P min-EESThis compensates for the difference between the allowable transient peak power and the allowable steady-state peak power at the grid connection point, and calculates the minimum capacity W using equation (15). min-EES To provide capacity support:

[0126] P min-EES =P transient-peak-load -P steady-peak-pcc ...Equation (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 this invention is based on the load value and steady-state peak power P of the test platform under different operating conditions. steady-peak-load And the grid connection 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 these factors determines the appropriate operating power for the energy storage system.

[0131] In the first operating condition:

[0132] Test platform load value P load (t) Exceeds the allowable steady-state peak power P at the grid connection point steady-peak-pcc And the duration t is greater than the maximum duration t allowed by the grid connection point for transient peak power. transient-peak-pcc When the system operates at power P1, the energy storage system is in standby mode with power 0. Power P1 is obtained using equation (16). Otherwise, the energy storage system is in standby mode with power 0. The power operation function P of the energy storage system in the second operating condition is... EES (t) is shown in equation (17):

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

[0134]

[0135] In the second operating condition:

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

[0137] P2 = P transient-peak-load -P transient-peak-pcc … equation (18);

[0138]

[0139] In the third operating condition:

[0140] When the test platform load value P load (t) exceeds the grid point allowed steady-state peak power P steady-peak-pcc and the duration t is greater than the grid point allowed transient peak power maximum duration t transient-peak-pcc , the energy storage system operates at power P1; when the test platform load value P load (t) exceeds the grid point allowed steady-state peak power P steady-peak-pcc and the duration t is less than the grid point allowed transient peak power maximum duration t transient-peak-pcc , the energy storage system operates at power P2; otherwise the energy storage system is standby and the power is 0; wherein the power operation function P EES (t) of the energy storage system in the third operating condition is shown in equation (20):

[0141]

[0142] In the fourth operating condition:

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

[0144] P3 = P steady-peak-load -P steady-peak-pcc … equation (21);

[0145]

[0146] In the fifth operating condition:

[0147] When the test platform load value P load (t) exceeds the grid point allowed steady state peak power P steady-peak-pcc but is less than the test platform steady state peak power P steady-peak-load , the energy storage system of the fifth operating condition operates at power P3; when the test platform load value P load (t) exceeds the test platform steady state peak power P steady-peak-load and the duration t is less than the grid point allowed transient peak power maximum duration t transient-peak-pcc , the energy storage system of the fifth operating condition operates at P2 power; when the test platform load value P load (t) exceeds the test platform steady state peak power P steady-peak-load and the duration t is greater than the grid point allowed transient peak power maximum duration t transient-peak-pcc , the energy storage system of the fifth operating condition operates at P1 power; otherwise the energy storage system is on standby and the power is 0; the power operating function P EES (t) of the energy storage system of the fifth operating condition is shown in equation (23):

[0148]

[0149] In the sixth operating condition:

[0150] When the test platform load value P load (t) exceeds the grid point allowed steady state peak power P steady-peak-pcc but is less than the test platform steady state peak power P steady-peak-load , the energy storage system of the sixth operating condition operates at P3 power; when the test platform load value P load (t) exceeds the test platform steady state peak power P steady-peak-load , the energy storage system of the sixth operating condition operates at P2 power; otherwise the energy storage system is on standby and the power is 0; the power operating function P EES (t) of the energy storage system of the sixth operating condition is shown in equation (24):

[0151]

[0152] In the seventh operating condition:

[0153] When the test platform load value P load (t) exceeds the grid point allowed steady state peak power P steady-peak-pcc but is less than the test platform steady state peak power P steady-peak-load , the energy storage system of the seventh operating condition operates at P3 power; when the test platform load value P load (t) exceeds the test platform steady state peak power P steady-peak-load and the duration t is less than the grid point allowed transient peak power maximum duration t transient-peak-pccWhen the test platform load value P load (t) exceeds the test platform steady-state peak power P steady-peak-load , and the duration t is greater than the maximum duration t transient-peak-pcc of the grid point allowed transient peak power, the energy storage system in the seventh working condition operates at P1 power; otherwise, the energy storage system is in standby and the power is 0; the power operating function P EES (t) of the energy storage system in the seventh working condition is shown in equation (25):

[0154]

[0155] The configuration and energy management method of the energy storage type power test platform can economically and effectively solve the problem of too large test power grade of electrical equipment but limited capacity of the grid point. The method is also applicable to working conditions with predictable, planable, adjustable and controllable characteristics, such as power supply stations, electrified intelligent buildings and park capacity expansion demand power consumption scenarios.

[0156] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application and not to limit the scope of protection of the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present application.

Claims

1. A configuration and energy management method of an energy storage type power test platform, characterized in that: The corresponding working condition is determined according to the relationship between the transient load characteristics of the power test platform, the steady load characteristics of the power test platform, the transient power characteristics allowed by the grid connection point and the steady 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 working condition, so as to adapt to different energy storage system configurations; meanwhile, in different working conditions, the corresponding operating power of the energy storage system is determined according to the relationship between the test platform load value and the transient power characteristics allowed by the grid connection point and the steady power characteristics allowed by the grid connection point, so as to carry out the segmented energy management of the energy storage system; The power test platform transient load characteristic is a power test platform transient peak power and a power test platform transient peak power maximum duration ; The steady state load characteristic of the power test platform is a steady state peak power of the power test platform and a maximum duration of the peak power of the power test platform ; The point of common coupling allows transient power characteristics to be the point of common coupling allows transient peak power and the point of common coupling allows transient peak power maximum duration ; The point of common coupling allows steady state power characteristics to be point of common coupling allows steady state peak power ; The test platform transient peak power Greater than test platform steady state peak power ; The relationship between the test platform transient peak power and the grid point allowed transient peak power The relationship between the test platform transient peak power and the grid point allowed transient peak power and the grid point allowed transient peak power maximum duration and the test platform transient peak power maximum duration together determine the determining operating condition, and then in the corresponding operating condition, the minimum power of the energy storage system is calculated and configured according to the corresponding calculation and the minimum capacity of the energy storage system is configured , so as to adapt to different energy storage system configurations; The working conditions include seven kinds, which are first working condition, second working condition, third working condition, fourth working condition, fifth working condition, sixth working condition and seventh working condition; The first operating condition is steady state peak power allowed at the point of interconnection ≥ steady state peak power of the test platform , transient peak power allowed at the point of interconnection ≥ transient peak power of the test platform , and maximum duration of transient peak power allowed at the point of interconnection ≤ maximum duration of transient peak power of the test platform ; The second operating condition is steady state peak power allowed at the point of interconnection ≥ steady state peak power of the test platform , transient peak power allowed at the point of interconnection ≤ transient peak power of the test platform , and maximum duration of transient peak power allowed at the point of interconnection ≥ maximum duration of transient peak power of the test platform ; The third operating condition is steady state peak power allowed at the point of interconnection ≥ steady state peak power of the test platform , transient peak power allowed at the point of interconnection < transient peak power of the test platform , and maximum duration of transient peak power allowed at the point of interconnection < maximum duration of transient peak power of the test platform ; The fourth operating condition is steady state peak power allowed at the point of interconnection Steady state peak power of the test platform Transient peak power allowed at the point of interconnection Transient peak power of the test platform And maximum duration of transient peak power allowed at the point of interconnection Maximum duration of transient peak power of the test platform ; The fifth operating condition is steady state peak power allowed at the point of interconnection Steady state peak power of the test platform Transient peak power allowed at the point of interconnection Transient peak power of the test platform And maximum duration of transient peak power allowed at the point of interconnection Maximum duration of transient peak power of the test platform ; The sixth operating condition is steady state peak power allowed at the point of interconnection Steady state peak power of the test platform Transient peak power allowed at the point of interconnection Transient peak power of the test platform And maximum duration of transient peak power allowed at the point of interconnection Maximum duration of transient peak power of the test platform ; The seventh operating condition is steady state peak power allowed at the point of interconnection Steady state peak power of the test platform Transient peak power allowed at the point of interconnection Transient peak power of the test platform And maximum duration of transient peak power allowed at the point of interconnection Maximum duration of transient peak power of the test platform ; In said first operating condition, said energy storage system is calculated by equation (1) for minimum power to compensate for power difference outside the allowed time over the grid point transient peak power, and by equation (2) for minimum capacity to provide capacity support: … Formula (1); … formula (2); In said second operating condition, said energy storage system is calculated by equation (3) for minimum power to compensate for the difference between the transient peak power allowed by the point of interconnection and the minimum capacity calculated by equation (4) to provide capacity support: … Formula (3); … Formula (4); In the third operating condition, the energy storage system is calculated for minimum power by equation (5) to compensate for the difference between the off-grid peak transient power and the off-grid peak steady state power, and for minimum capacity by equation (6) to provide capacity support: … formula (5) … formula (6); In the fourth operating condition, the energy storage system is calculated by equation (7) for minimum power to compensate for the difference over the grid point allowed steady state peak power, and by equation (8) for minimum capacity to provide capacity support: … formula (7); … Formula (8); In said fifth operating condition, the energy storage system is calculated by equation (9) for minimum power to compensate for the power difference over the steady state and transient peak of the point of common coupling, and by equation (10) for minimum capacity to provide capacity support: … Formula (9); … Formula (10); In the sixth operating condition, the energy storage system selects the greater value as the minimum power from the calculation of both equations (11) and (12) The difference between the transient peak power allowed by the point of interconnection and the steady state peak power allowed by the point of interconnection, and the minimum capacity calculated from equation (13) to provide capacity support: … Formula (11); … Formula (12); ... formula (13); In the seventh operating condition, the energy storage system is calculated for minimum power by equation (14) to compensate for the difference between the off-grid peak transient power and the off-grid peak steady state power, and for minimum capacity by equation (15) to provide capacity support: … Formula (14); … Formula (15).

2. The method of claim 1, wherein: In the first operating condition, the allowed time is the difference between the peak power maximum duration of the power test platform and the transient peak power maximum duration allowed at the point of common coupling In the first operating condition, the allowed time is the difference between the peak power maximum duration of the power test platform and the transient peak power maximum duration allowed at the point of common coupling In the first operating condition, the allowed time is the difference between the peak power maximum duration of the power test platform and the transient peak power maximum duration allowed at 3. The method of claim 2, wherein: The segmented energy management of the energy storage system is according to the relationship between the test platform load value and the test platform steady-state peak power and the grid-connected point allows the steady-state peak power The relationship between the time of the test platform load value and the maximum duration of the transient peak power of the test platform corresponding to the selection of the operating power of the energy storage system.

4. The method of claim 3, wherein, In the first working condition: Test platform load values Exceeding the point of common coupling allowed steady state peak power and the duration t is greater than the point of common coupling allowed transient peak power maximum duration , the energy storage system operates at power , power is obtained by equation (16), otherwise the energy storage system is on standby and the power is 0; wherein the power operating function of the energy storage system in the second working condition is shown in equation (17): … Formula (16); … Formula (17); In the second working condition: When the test platform load value exceeds the point of common coupling allowed transient peak power , the energy storage system operates at power , power is obtained by equation (18), otherwise the energy storage system is on standby and power is 0; wherein the power operating function of the energy storage system in the second working condition is shown as equation (19): … Formula (18); … Formula (19); In the third working condition: When the test platform load value Exceeding the grid connection point's allowable steady-state peak power At that time, and the duration t is greater than the maximum allowable transient peak power duration at the grid connection point. At that time, the energy storage system according to power Run; when the test platform load value Exceeding the grid connection point's allowable steady-state peak power At that time, and for a duration t Less than the maximum duration of transient peak power allowed at the grid connection point At that time, the energy storage system is based on power The system is running; otherwise, the energy storage system is in standby mode with zero power; wherein the power operation function of the energy storage system in the third operating condition is... As shown in equation (20): … Formula (20); In the fourth working condition: When the test platform load value exceeds the point of common coupling allowed steady state peak power but does not exceed the test platform steady state peak power , the energy storage system of the fourth operating condition operates at power , where power is given by equation (21). Otherwise the energy storage system is on standby and the power is 0; the power function of the energy storage system in the fourth operating mode As shown in equation (22): … Formula (21); … Formula (22); In the fifth working condition: When the test platform load value Exceeding the grid connection point's allowable steady-state peak power But not exceeding the steady-state peak power of the test platform At that time, the energy storage system in the fifth operating condition operates according to power... Run; when the test platform load value Exceeding the steady-state peak power of the test platform And the duration t is less than the maximum duration of transient peak power allowed at the grid connection point. At that time, the energy storage system in the fifth operating condition shall comply with Power operation; when the test platform load value Exceeding the steady-state peak power of the test platform And the duration t is greater than the maximum duration of transient peak power allowed at the grid connection point. At that time, the energy storage system in the fifth operating condition shall comply with Power operation; otherwise, the energy storage system is in standby mode with zero power; the power operation function of the energy storage system in the fifth operating condition. As shown in equation (23): … Formula (23); In the sixth working condition: When the test platform load value Allowable steady-state peak power at grid connection point However, it is less than the steady-state peak power of the test platform. At that time, the energy storage system in the sixth operating condition shall comply with Power operation; when the test platform load value Exceeding the steady-state peak power of the test platform At that time, the sixth operating condition energy storage system according to Power operation; otherwise, the energy storage system is in standby mode with zero power; the power operation function of the energy storage system in the sixth operating condition. As shown in equation (24): … Formula (24); In the seventh working condition: when the test platform load value exceeds the point of common coupling allowed steady state peak power but is less than the test platform steady state peak power , the energy storage system of the seventh operating mode operates at power ; when the test platform load value exceeds the test platform steady state peak power and the duration t is less than the point of common coupling allowed transient peak power maximum duration , the energy storage system of the seventh operating mode operates at power ; when the test platform load value exceeds the test platform steady state peak power and the duration t is greater than the point of common coupling allowed transient peak power maximum duration , the energy storage system of the seventh operating mode operates at power; otherwise the energy storage system is on standby and the power is 0; the power operation function of the energy storage system of the seventh operating mode is shown as equation (25): … Formula (25).

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