A power distribution control method, a control circuit and a computer storage medium

Abstract

The application relates to a power distribution control method, a control circuit and a computer storage medium, which comprises the following steps of acquiring an RTG operation signal H valid ; setting a DCDC bus voltage by a controller after the RTG operation signal H valid is received; if V B -10<=V<=V B +10, P B <=50%*P2, S>=S M >=90%*S, the controller is given unchanged, and the RTG is stably operated; if V B <=V C -10, the controller is given P O =P+15%*P1, and V B =V B +5; if P C >1.3*P during operation, the controller is given P O =P+15%*P1, and V B =V B +10; if P>80%*P C during operation, the controller is given P O unchanged, V B =V B -5, the battery power is kept between 1.2*P and 1.3*P during the adjustment process, P B <=80%*P2, P<=80%*P1, S>=S M >=90%*S, until V B -10<=V<=V B +10, the controller is given unchanged, and the RTG is stably operated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power distribution, in particular to a power distribution control method and a control circuit. BACKGROUND

[0002] At present, there are two ways for port machinery to use diesel generator sets. One is to directly power a single diesel generator set, and to set a current limiting value through a frequency converter to realize the maximum power limitation of the diesel generator set. This power supply mode has two disadvantages:

[0003] 1. Energy waste caused by the inability to recover the descending potential energy;

[0004] 2. High oil consumption, black smoke during lifting, and high standby oil consumption.

[0005] In addition, the other way is to power the diesel generator and lithium battery set. This power supply mode can absorb part of the descending potential energy, to a certain extent, reduce the disadvantages of black smoke, low service life and easy to extinguish of the diesel generator set, but cannot completely absorb the descending potential energy and completely solve the problem of black smoke of the diesel generator set.

[0006] The preceding description is to provide general background information and does not necessarily constitute the prior art. SUMMARY

[0007] The purpose of the present application is to provide a power distribution control method, a control circuit and a computer storage medium, which solves the problems of black smoke, increased oil consumption, reduced service life of the diesel generator set and inability to fully absorb the descending potential energy.

[0008] The present application provides a power distribution control method, comprising the following steps:

[0009] S1: obtaining an RTG running signal H valid ;

[0010] S2: after receiving the RTG running signal H valid , the controller sets the DCDC bus voltage to V O =V B +10, P C =35%*P1;

[0011] S3: if V B -10≤V≤V B +10, P B ≤50%*P2, S ≥S M ≥ 90%*S, the controller is given unchanged, and the RTG is stably running;

[0012] S4: if V≤V B -10, the controller gives PC =P + 15% * P1, V O = V B + 5, given this, if V≤V B -10, then the repetitive controller gives P C =P + 15% * P1, V O = V B + 5, During the adjustment process, the battery power is maintained at 1.2 * P≤P B ≤1.3 * P, and P B ≤80% * P2, P ≤80% * P1, S≥S M ≥90% * S, until V B -10 ≤ V ≤ V B +10, and the controller input remains unchanged, and the RTG operates stably;

[0013] S5: If P is running B If the value is greater than 1.3 * P, then the controller sets P. C = P + 15% * P1, V O = V B + 10, given this, if P B >1.3 * P, and 60% * P² ≤ P B If the value is less than 80% * P2, then the controller sets P. C = P + 20% * P1, V O = V B +15, during the adjustment process, the battery power remains at 1.2 * P ≤ P B ≤ 1.3 * P, and P B ≤80% * P2, P ≤80% *P1, S ≥ S M ≥ 90% * S, until V B -10 ≤ V ≤ V B +10, RTG is running stably;

[0014] S6: If P > 80% * P during operation B Then the controller gives P C V remains unchanged O = V B -5, During the adjustment process, the battery power is maintained at 1.2 * P ≤ P B ≤ 1.3 * P and P B ≤ 80% * P2, P ≤ 80% * P1, S ≥ S M ≥ 90%* S, until V B -10≤ V ≤ VB +10 means the controller input remains unchanged, and the RTG operates stably.

[0015] Further, P1 represents the rated power of the diesel generator set, P2 represents the rated power of the lithium battery pack, and V... O V represents the DC-DC bus voltage. B P represents the real-time voltage of the battery pack. B The value of P represents the real-time power of the lithium battery pack, where V represents the actual bus voltage. C The controller provides the given power, where P represents the real-time power of the diesel generator set, and S represents the power supplied by the controller. M This indicates the real-time speed of the diesel generator set, where S represents the rated speed of the diesel generator set.

[0016] Furthermore, in step S4, the maximum power of the RTG operation does not exceed 80% * P2 + 80% * P1.

[0017] The present invention also provides a control circuit applied to the power distribution control method described above.

[0018] Furthermore, the control circuit includes a diesel generator set, a rectifier inverter, a DC-DC inverter, an RTG DC bus, a battery DC power supply, and a DC contactor; the diesel generator set is connected to the rectifier inverter, the DC-DC inverter is connected to the rectifier inverter, and the DC-DC inverter is connected to the RTG DC bus; the battery DC power supply is connected to the RTG DC bus through the DC contactor.

[0019] The present invention also provides a computer storage medium including a computer program, which, when executed, performs the power distribution control method described above.

[0020] The power distribution control method provided by this invention monitors the operating parameters of the lithium battery pack and the diesel generator set through a controller, and rationally distributes the power of the diesel generator set and the lithium battery pack to achieve full absorption of declining potential energy and zero black smoke emission from the diesel generator set. This solves the problems of black smoke emission, increased fuel consumption, reduced lifespan, and incomplete absorption of declining potential energy from the diesel generator set. This control method makes the diesel generator set operate more smoothly and stably, significantly reducing the probability of generator set shutdown, greatly reducing fuel consumption, improving fuel efficiency, extending generator set lifespan, increasing energy recovery, improving energy utilization, and significantly saving port operating costs. Attached Figure Description

[0021] Figure 1 A schematic diagram of the control circuit provided in an embodiment of the present invention.

[0022] Figure 2 This is a schematic diagram of the module flow of the power distribution control method provided in an embodiment of the present invention.

[0023] The reference numerals and components involved in the accompanying drawings are shown below:

[0024] 100. Diesel generator set

[0025] 200. Rectifier frequency converter

[0026] 300, DC-DC frequency converter

[0027] 400, RTG DC busbar

[0028] 500, Battery DC Power Supply

[0029] 600. DC contactor

[0030] 700, Controller Detailed Implementation

[0031] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0032] The terms "first," "second," "third," "fourth," etc., used in the specification and claims of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0033] Example 1

[0034] Figure 1 This is a schematic diagram of the control circuit provided in an embodiment of the present invention. Figure 2 This is a schematic flowchart of the power distribution control method provided in an embodiment of the present invention. Please refer to... Figure 1 , Figure 2 The power distribution control method provided in this embodiment of the invention includes the following steps:

[0035] S1: Obtain the RTG (Road-Mounted Gantry Crane) operating signal H valid ;

[0036] S2: When the RTG operation signal H is received valid Then, the controller sets the DC-DC bus voltage to V. O =V B +10, P C =35%*P1;

[0037] S3: If V B -10≤V≤V B +10, PB ≤50%*P2, S ≤S M If the value is ≥ 90%*S, the controller input remains unchanged, and the RTG operates stably.

[0038] S4: If V≤V B -10, then the controller sets P C =P + 15% * P1, V O = V B + 5, given this, if V≤V B -10, then the repetitive controller gives P C =P + 15% * P1, V O = V B + 5, During the adjustment process, the battery power is maintained at 1.2 * P≤P B ≤1.3 * P, and P B ≤80% * P2, P ≤80% * P1, S≥S M ≥90% * S, until V B -10 ≤ V ≤ V B +10, and the controller input remains unchanged, and the RTG operates stably;

[0039] S5: If P is running B If the value is greater than 1.3 * P, then the controller sets P. C = P + 15% * P1, V O = V B + 10, given this, if P B >1.3 * P, and 60% * P² ≤ P B If the value is less than 80% * P2, then the controller sets P. C = P + 20% * P1, V O = V B +15, during the adjustment process, the battery power remains at 1.2 * P ≤ P B ≤ 1.3 * P, and P B ≤80% * P2, P ≤80% *P1, S ≥ S M ≥ 90% * S, until V B -10 ≤ V ≤ V B +10, RTG is running stably;

[0040] S6: If P > 80% * P during operation B Then the controller gives P C V remains unchanged O = V B -5, During the adjustment process, the battery power is maintained at 1.2 * P ≤ PB ≤ 1.3 * P and P B ≤ 80% * P2, P ≤ 80% * P1, S ≥ S M ≥ 90%* S, until V B -10≤ V ≤ V B +10 means the controller input remains unchanged, and the RTG operates stably.

[0041] Specifically, P1 represents the rated power of the diesel generator set, P2 represents the rated power of the lithium battery pack, and V... O V represents the DC-DC bus voltage. B P represents the real-time voltage of the battery pack. B The value of P represents the real-time power of the lithium battery pack, where V represents the actual bus voltage. C The controller provides the given power, where P represents the real-time power of the diesel generator set, and S represents the power supplied by the controller. M This indicates the real-time speed of the diesel generator set, where S represents the rated speed of the diesel generator set.

[0042] Furthermore, in step S4, the maximum power of the RTG operation does not exceed 80% * P2 + 80% * P1; and the diesel generator and battery pack still have a margin of power, increasing the system's lifespan and stability.

[0043] It should be noted that the power distribution control method of this invention refers to the power distribution control logic method between diesel generator and battery in RTG hybrid system. By monitoring the operating parameters of lithium battery pack and diesel generator set through controller 700, and by rationally distributing the power of diesel generator set and lithium battery pack, the method achieves full absorption of declining potential energy and eliminates black smoke emissions from diesel generator set. This solves the problems of black smoke emission, increased fuel consumption, reduced lifespan of diesel generator set, and inability to fully absorb declining potential energy. This control method makes the diesel generator set operate more smoothly and stably, greatly reduces the probability of diesel generator set shutdown, significantly reduces diesel generator set fuel consumption, improves diesel generator set fuel utilization efficiency, increases diesel generator set lifespan, increases energy recovery, improves energy utilization, and greatly saves port operating costs.

[0044] Further reference Figure 1 , Figure 2 The present invention also provides a control circuit applied to the power distribution control method described above.

[0045] The control circuit of the present invention includes a diesel generator set 100, a rectifier frequency converter 200, a DC-DC converter 300, an RTG DC bus 400, a battery DC power supply 500, and a DC contactor 600; the diesel generator set 100 is connected to the rectifier frequency converter 200, the DC-DC converter 300 is connected to the rectifier frequency converter 200, and the DC-DC converter 300 is connected to the RTG DC bus 400; the battery DC power supply 500 is connected to the RTG DC bus 400 through the DC contactor 600.

[0046] It should be noted that the three-phase AC power generated by the diesel generator set 100 is rectified into DC power by the rectifier inverter 200, and then connected to the RTG DC bus 400 through the DC-DC inverter 300; the battery DC power supply 500 is connected to the RTG DC bus 400 through the DC contactor 600. The controller 700 controls the charging and discharging of the battery and the power distribution of the diesel generator set by the DC-DC inverter 300 to achieve power distribution and protection of the entire system.

[0047] The present invention also provides a computer storage medium including a computer program, which, when executed, performs the power distribution control method described above.

[0048] As can be seen from the above description, the advantages of this invention are:

[0049] 1. The power distribution control method provided by the present invention monitors the operating parameters of the lithium battery pack and the diesel generator set by the controller, and rationally distributes the power of the diesel generator set and the lithium battery pack to achieve full absorption of the declining potential energy and no black smoke emission from the diesel generator set.

[0050] 2. The power distribution control method provided by this invention solves the problems of black smoke emission, increased fuel consumption, reduced lifespan of diesel generator sets, and inability to fully absorb decreased potential energy.

[0051] 3. The power distribution control method provided by this invention makes the diesel generator set run more smoothly and stably, greatly reduces the probability of diesel generator set shutdown, greatly reduces diesel generator set fuel consumption, improves diesel generator set fuel utilization efficiency, increases diesel generator set life, increases energy recovery, improves energy utilization rate, and greatly saves port operating costs.

[0052] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A power distribution control method, characterized in that, Includes the following steps: S1: Obtain RTG operation signal H valid ; S2: When the RTG operation signal H is received valid Then, the controller sets the DC-DC bus voltage to V. O =V B +10, P C =35%*P1; S3: If V B -10≤V≤V B +10, P B ≤50%*P2, S ≥S M If the value is ≥90%*S, the controller input remains unchanged, and the RTG operates stably. S4: If V≤V B -10, then the controller sets P C =P + 15% * P1, V O = V B + 5, given this, if V≤V B -10, then the repetitive controller gives P C =P + 15% * P1, V O = V B + 5, During the adjustment process, the battery power is maintained at 1.2 * P≤P B ≤1.3 * P, and P B ≤80% * P2, P ≤80% * P1, S≥S M ≥90% * S, until V B -10 ≤ V ≤ V B +10 means the controller input remains unchanged, and the RTG operates stably; S5: If P is running B If P > 1.3 * P, then the controller is given P. C = P + 15% * P1, V O = V B + 10, given this, if P B > 1.3 * P, and 60% * P² ≤ P B If P < 80% * P2, then the controller sets P. C = P + 20% * P1, V O =V B +15, during the adjustment process, the battery power remains at 1.2 * P ≤ P B ≤ 1.3 * P, and P B ≤80% * P2, P ≤80% * P1, S ≥S M ≥ 90% * S, until V B -10 ≤ V ≤ V B +10, RTG is running stably; S6: If P > 80% * P during operation B Then the controller gives P C V remains unchanged O = V B -5, During the adjustment process, the battery power is maintained at 1.2 * P ≤ P B ≤ 1.3 * P and P B ≤ 80% * P2, P ≤ 80% * P1, S ≥ S M ≥ 90% *S, until V B -10≤ V ≤ V B +10 means the controller input remains unchanged, and the RTG operates stably; P1 represents the rated power of the diesel generator set, P2 represents the rated power of the lithium battery pack, and V... O V represents the DC-DC bus voltage. B P represents the real-time voltage of the battery pack. B The value of P represents the real-time power of the lithium battery pack, where V represents the actual bus voltage. C The controller provides the given power, where P represents the real-time power of the diesel generator set, and S represents the power supplied by the controller. M This indicates the real-time speed of the diesel generator set, where S represents the rated speed of the diesel generator set.

2. The power distribution control method according to claim 1, characterized in that, In step S4, the maximum power of the RTG operation does not exceed 80% * P2 + 80% * P1.

3. A control circuit, characterized in that, Applied to the power distribution control method according to any one of claims 1 to 2.

4. The control circuit according to claim 3, characterized in that, The control circuit includes a diesel generator set (100), a rectifier frequency converter (200), a DC-DC frequency converter (300), an RTG DC busbar (400), a battery DC power supply (500), and a DC contactor (600). The diesel generator set (100) is connected to the rectifier frequency converter (200), and the DC-DC frequency converter (300) is connected to the rectifier frequency converter (200). The DC-DC frequency converter (300) is connected to the RTG DC bus (400). The battery DC power supply (500) is connected to the RTG DC bus (400) through the DC contactor (600).

5. A computer storage medium, characterized in that, It includes a computer program, which, when executed, performs the power distribution control method according to any one of claims 1 to 2.

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