CN114412647B - Control method and system of hybrid power system of double-shaft gas turbine - Google Patents
Control method and system of hybrid power system of double-shaft gas turbine Download PDFInfo
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- CN114412647B CN114412647B CN202210126887.3A CN202210126887A CN114412647B CN 114412647 B CN114412647 B CN 114412647B CN 202210126887 A CN202210126887 A CN 202210126887A CN 114412647 B CN114412647 B CN 114412647B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C9/00—Controlling gas-turbine plants; Controlling fuel supply in air- breathing jet-propulsion plants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
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Abstract
The invention relates to a control method and a control system of a double-shaft gas turbine hybrid power system, wherein the control method is applied to the double-shaft gas turbine hybrid power system, and the double-shaft gas turbine hybrid power system supplies power for an electric load, and the control method comprises the following steps: acquiring the state of charge of energy storage equipment in the double-shaft gas turbine hybrid power system; judging the state of charge, and outputting a first control strategy when the state of charge is within a set threshold range; outputting a second control strategy when the state of charge is less than or equal to the set threshold range; outputting a third control strategy when the state of charge is greater than or equal to the set threshold range; the dual-shaft gas turbine hybrid system is controlled based on the first control strategy, the second control strategy, and the third control strategy. The invention improves the fuel economy of the double-shaft gas turbine and ensures the safe operation of the hybrid power system while ensuring the supply of the required power.
Description
Technical Field
The invention relates to the technical field of hybrid power, in particular to a control method and a control system of a hybrid power system of a double-shaft gas turbine.
Background
The hybrid power system is a system which is provided with two or more power sources and realizes that the power sources output energy to the outside independently or jointly through a related control device. The current hybrid power system for realizing energy output in an electric power mode basically consists of a gasoline engine/diesel engine, a generator and energy storage equipment. Compared with the gasoline engine/diesel engine, the dual-shaft gas turbine has higher power ratio, namely the dual-shaft gas turbine has smaller weight than the gasoline engine/diesel engine under the condition of outputting the same power, and the dual-shaft gas turbine has simpler structure and is easy to maintain. The hybrid power system based on the dual-shaft gas turbine has the advantage of high power-to-weight ratio, which is beneficial to optimizing the structural design layout of the hybrid power system. However, the existing double-shaft gas turbine only works under the condition of the power state of the designated design point, and the fuel economy is extremely bad along with the decrease of the output power, so that the fuel economy of the existing hybrid power system based on the double-shaft gas turbine is poor under the condition of the power state of the non-design point, the advantages of high power ratio of the system are offset, and the wide application of the hybrid power system based on the double-shaft gas turbine is limited.
Based on the above problems, the fuel economy of the dual-shaft gas turbine is improved by connecting the motor/generator to the high-pressure shaft and the low-pressure shaft of the dual-shaft gas turbine in combination with the control scheme, however, the existing control scheme is complicated in control strategy and easily causes the dual-shaft gas turbine to be in an abnormal working state such as surge and the like.
Disclosure of Invention
In view of the above, the invention provides a control method and a control system for a hybrid power system of a double-shaft gas turbine, which can improve the fuel economy of the double-shaft gas turbine while ensuring the supply of required power, ensure the safe operation of the hybrid power system, optimize the regulation and control of a motor and a generator, reduce the complexity of a control process and improve the efficiency of the hybrid power system.
The fuel economy of the hybrid power system is improved, and the safe operation of the energy storage equipment is ensured.
In order to achieve the above object, the present invention provides the following solutions:
a control method of a dual-shaft gas turbine hybrid system, the control method being applied to a dual-shaft gas turbine hybrid system that supplies power to an electrical load, the control method comprising:
acquiring the state of charge of energy storage equipment in the double-shaft gas turbine hybrid power system;
judging the state of charge, and outputting a first control strategy when the state of charge is within a set threshold range; outputting a second control strategy when the state of charge is less than or equal to the set threshold range; outputting a third control strategy when the state of charge is greater than or equal to the set threshold range;
the dual-shaft gas turbine hybrid system is controlled based on the first control strategy, the second control strategy, and the third control strategy.
Preferably, the judging the state of charge outputs a first control strategy when the state of charge is within a set threshold range; outputting a second control strategy when the state of charge is less than or equal to the set threshold range; outputting a third control strategy when the state of charge is greater than or equal to the set threshold range, comprising:
acquiring the required power of the electricity load and judging the state of charge;
when the state of charge is within a set threshold value range, obtaining the first control strategy based on the fact that the output power of a generator in the dual-shaft gas turbine hybrid power system is equal to the required power; when the state of charge is less than or equal to the set threshold range, obtaining the second control strategy based on the generator output power being equal to the sum of the required power and the maximum output power of the energy storage device; and when the state of charge is greater than or equal to the set threshold range, outputting maximum output power based on the energy storage equipment, wherein the generator output power is equal to the required power minus the maximum output power, so as to obtain the third control strategy.
Preferably, the first control strategy is: the output power of the generator in the double-shaft gas turbine hybrid power system is equal to the required power, the motor in the double-shaft gas turbine hybrid power system outputs a first motor reference rotating speed, the low-voltage shaft in the double-shaft gas turbine hybrid power system outputs a first low-voltage shaft reference rotating speed, and the generator in the double-shaft gas turbine hybrid power system outputs a first generator reference torque.
Preferably, the second control strategy is: the output power of the generator in the double-shaft gas turbine hybrid power system is equal to the sum of the required power and the maximum output power of the energy storage device, the generator in the double-shaft gas turbine hybrid power system supplies power for the electricity load and charges the energy storage device, the low-voltage shaft in the double-shaft gas turbine hybrid power system outputs a second low-voltage shaft reference rotating speed, and the generator in the double-shaft gas turbine hybrid power system outputs a second generator reference torque.
Preferably, the third control strategy is: the energy storage device outputs maximum output power, the output power of a generator in the dual-shaft gas turbine hybrid power system is equal to the required power minus the maximum output power, a low-voltage shaft in the dual-shaft gas turbine hybrid power system outputs a third low-voltage shaft reference rotating speed, and a generator in the dual-shaft gas turbine hybrid power system outputs a third generator reference torque.
Preferably, a state threshold value of 0 < a1 < a2 < a3 < 1 is set;
the set threshold range is greater than a1 and less than a3;
after the first control strategy is executed for a set time, returning to the step of judging the state of charge, and outputting the first control strategy when the state of charge is within a set threshold range; outputting a second control strategy when the state of charge is less than or equal to the set threshold range; outputting a third control strategy "when the state of charge is greater than or equal to the set threshold range;
after the second control strategy is executed for the set time, judging whether the state of charge is greater than or equal to a2, if not, continuing to execute the second control strategy, if so, returning to the step of judging the state of charge, and when the state of charge is within a set threshold value range, outputting a first control strategy; outputting a second control strategy when the state of charge is less than or equal to the set threshold range; outputting a third control strategy "when the state of charge is greater than or equal to the set threshold range;
after the third control strategy is executed for the set time, judging whether the state of charge is smaller than or equal to a2, if not, continuing to execute the third control strategy, if so, returning to the step of judging the state of charge, and when the state of charge is within a set threshold value range, outputting a first control strategy; outputting a second control strategy when the state of charge is less than or equal to the set threshold range; and outputting a third control strategy when the state of charge is greater than or equal to the set threshold range.
The invention also provides a control system of the double-shaft gas turbine hybrid power system, the control system is applied to the double-shaft gas turbine hybrid power system, the double-shaft gas turbine hybrid power system supplies power for an electric load, and the control system comprises:
the data acquisition module is used for acquiring the state of charge of energy storage equipment in the hybrid power system of the double-shaft gas turbine;
the control module is used for judging the state of charge, and outputting a first control strategy when the state of charge is within a set threshold range; outputting a second control strategy when the state of charge is less than or equal to the set threshold range; outputting a third control strategy when the state of charge is greater than or equal to the set threshold range; the dual-shaft gas turbine hybrid system is controlled based on the first control strategy, the second control strategy, and the third control strategy.
Preferably, the control module includes: a main controller, a motor controller, a rotational speed controller and a generator controller;
the data acquisition module acquires the required power of the power utilization load; the main controller judges the state of charge;
when the state of charge is within a set threshold range, the main controller outputs a first control strategy; when the state of charge is less than or equal to the set threshold range, the master controller outputs a second control strategy; when the state of charge is greater than or equal to the set threshold range, the master controller outputs a third control strategy;
the motor controller controlling a motor output first motor reference speed in the dual-shaft gas turbine hybrid system based on the first control strategy; the rotating speed controller controls a low-pressure shaft in the double-shaft gas turbine hybrid power system to output a first low-pressure shaft reference rotating speed based on the first control strategy, and the generator controller controls a generator in the double-shaft gas turbine hybrid power system to output a first generator reference torque based on the first control strategy;
the rotating speed controller controls the low-voltage shaft to output a second low-voltage shaft reference rotating speed based on the second control strategy, and the generator controller controls the generator to output a second generator reference torque based on the second control strategy;
the rotation speed controller controls the low-voltage shaft to output a third low-voltage shaft reference rotation speed based on the third control strategy, and the generator controller controls the generator to output a third generator reference torque based on the third control strategy.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention relates to a control method and a control system of a double-shaft gas turbine hybrid power system, wherein the control method is applied to the double-shaft gas turbine hybrid power system, and the double-shaft gas turbine hybrid power system supplies power for an electric load, and the control method comprises the following steps: acquiring the state of charge of energy storage equipment in the double-shaft gas turbine hybrid power system; judging the state of charge, and outputting a first control strategy when the state of charge is within a set threshold range; outputting a second control strategy when the state of charge is less than or equal to the set threshold range; outputting a third control strategy when the state of charge is greater than or equal to the set threshold range; the dual-shaft gas turbine hybrid system is controlled based on the first control strategy, the second control strategy, and the third control strategy. The invention improves the fuel economy of the double-shaft gas turbine and ensures the safe operation of the hybrid power system while ensuring the supply of the required power.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a control method of a dual-shaft gas turbine hybrid system of the present invention;
FIG. 2 is a block diagram of a control system of the dual-shaft gas turbine hybrid system of the present invention;
FIG. 3 is a block diagram of a dual shaft gas turbine hybrid power system;
FIG. 4 is a flow chart of a decision making process according to the present invention.
Symbol description: the system comprises a 1-motor, a 2-compressor, a 3-double-shaft gas turbine, a 4-generator, a 5-energy storage device, a 6-electric load, a 7-electric bus, an 8-data acquisition module, a 9-control module, a 31-high-pressure compressor, a 32-combustion chamber, a 33-high-pressure shaft, a 34-high-pressure turbine, a 35-low-pressure turbine, a 36-low-pressure shaft, a 91-main controller, a 92-motor controller, a 93-rotating speed controller and a 94-generator controller.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a control method and a control system for a hybrid power system of a double-shaft gas turbine, which are used for improving the fuel economy of the double-shaft gas turbine while ensuring the supply of required power, ensuring the safe operation of the hybrid power system, optimizing the regulation and control of a motor and a generator, reducing the complexity of a control process and improving the efficiency of the hybrid power system.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
The hybrid system of the dual-shaft gas turbine is described in detail to facilitate an understanding of the control method provided by the present invention.
The dual-shaft gas turbine hybrid power system supplies power to an electric load 6, fig. 3 is a structural diagram of the dual-shaft gas turbine hybrid power system, and as shown in fig. 3, the dual-shaft gas turbine hybrid power system includes: an electric motor 1, a compressor 2, a twin-shaft gas turbine 3, a generator 4, an energy storage device 5 and an electric bus 7.
The dual-shaft gas turbine 3 includes a high-pressure compressor 31, a combustor 32, a high-pressure shaft 33, a high-pressure turbine 34, a low-pressure turbine 35, and a low-pressure shaft 36.
The motor 1 is connected with a rotating shaft of the air compressor 2, and the air compressor 2 is pneumatically connected with the high-pressure air compressor 31.
The high-pressure compressor 31 and the high-pressure turbine 34 are both connected to the combustion chamber 32 by pipes. The high-pressure compressor 31 and the high-pressure turbine 34 are connected by the high-pressure shaft 33.
The pneumatic connection between the high-pressure turbine 34 and the low-pressure turbine 35; the low-pressure turbine 35 and the generator 4 are connected by the low-pressure shaft 36.
The motor 1, the generator 4, the energy storage device 5 and the electric load 6 are connected in parallel through the electric bus 7.
FIG. 1 is a flow chart of a control method of a dual shaft gas turbine hybrid power system of the present invention. As shown in the drawings, the present invention provides a control method of a dual-shaft gas turbine hybrid system, the control method being applied to the dual-shaft gas turbine hybrid system, the control method comprising:
step S1, acquiring the charge state of the energy storage equipment.
Step S2, judging the state of charge; outputting a first control strategy when the state of charge is within a set threshold range; outputting a second control strategy when the state of charge is less than or equal to the set threshold range; and outputting a third control strategy when the state of charge is greater than or equal to the set threshold range.
Fig. 4 is a flowchart of the decision execution process according to the present invention, as shown in fig. 4, the step S2 specifically includes:
setting a state threshold value 0 < a1 < a2 < a3 < 1; the set threshold range is greater than a1 and less than a3. And acquiring the required power of the electric load 6.
Judging the state of charge;
when the state of charge is within a set threshold range, obtaining the first control strategy based on the generator output power being equal to the required power; when the state of charge is less than or equal to the set threshold range, obtaining the second control strategy based on the generator output power being equal to the sum of the required power and the maximum output power of the energy storage device; and when the state of charge is greater than or equal to the set threshold range, outputting maximum output power based on the energy storage equipment, wherein the generator output power is equal to the required power minus the maximum output power, so as to obtain the third control strategy.
The first control strategy specifically comprises the following steps: and the generator output power is equal to the required power, and the first motor reference rotating speed, the first low-voltage shaft reference rotating speed and the first generator reference torque are obtained based on the generator output power being equal to the required power. The electric motor 1 operates at the first motor reference rotational speed, the low-voltage shaft operates at the first low-voltage shaft reference rotational speed, and the generator 4 operates at the first generator reference torque. And after the first control strategy setting time is executed, returning to the step of judging the charge state.
The second control strategy specifically comprises the following steps: the output power of the generator 4 is equal to the sum of the required power and the maximum output power, the generator 4 charges the energy storage device while supplying power to the electric load 6, and the second low-voltage shaft 36 reference rotation speed and the second generator 4 reference torque are obtained based on the fact that the output power of the generator 4 is equal to the sum of the required power and the maximum output power. The low-pressure shaft 36 operates at the second low-pressure shaft 36 reference rotational speed, and the generator 4 operates at the second generator 4 reference torque. And after the second control strategy is executed for the set time, judging whether the state of charge is greater than or equal to a2, if not, continuing to execute the second control strategy, and if so, returning to the step of judging the state of charge.
The third control strategy specifically comprises: and the generator output power is equal to the required power minus the maximum output power, and a third low-voltage shaft reference rotating speed and a third generator reference torque are obtained based on the generator output power being equal to the required power minus the maximum output power. The low-pressure shaft 36 operates at the third low-pressure shaft reference rotational speed, and the generator 4 operates at the third generator reference torque. And after the second control strategy is executed for the set time, judging whether the state of charge is smaller than or equal to a2, if not, continuing to execute the third control strategy, and if so, returning to the step of judging the state of charge.
Step S3, controlling the dual-shaft gas turbine hybrid system based on the first control strategy, the second control strategy, and the third control strategy.
FIG. 2 is a block diagram of a control system for a dual shaft gas turbine hybrid system of the present invention. As shown in the drawings, the present invention provides a control system of a dual-shaft gas turbine hybrid system, which is applied to a dual-shaft gas turbine hybrid system, comprising: a data acquisition module 8 and a control module 9.
The control module 9 includes a main controller 91, a motor controller 92, a rotational speed controller 93, and a generator controller 94.
The data acquisition module 8 acquires the state of charge of the energy storage device 5 and the required power of the electric load 6.
The main controller 91 determines the state of charge.
When the state of charge is within a set threshold range, the main controller 91 outputs a first control strategy; when the state of charge is less than or equal to the set threshold range, the main controller 91 outputs a second control strategy; when the state of charge is greater than or equal to the set threshold range, the main controller 91 outputs a third control strategy.
The motor controller 92 controls the motor 1 to output a first motor reference rotation speed based on the first control strategy; the rotational speed controller 93 controls the low-pressure shaft 36 to output a first low-pressure shaft reference rotational speed based on the first control strategy, and the generator controller 94 controls the generator 4 to output a first generator reference torque based on the first control strategy.
The rotation speed controller 93 controls the low-pressure shaft 36 to output a second low-pressure shaft reference rotation speed based on the second control strategy, and the generator controller 94 controls the generator 4 to output a second generator reference torque based on the second control strategy.
The rotation speed controller 93 controls the low-pressure shaft 36 to output a third low-pressure shaft reference rotation speed based on the third control strategy, and the generator controller 94 controls the generator 4 to output a third generator reference torque based on the third control strategy.
According to the external power demand and the state of charge of the energy storage equipment, reasonable switching of the control strategy of the hybrid power system of the double-shaft gas turbine is realized.
When the state of charge of the energy storage equipment is lower than the set threshold value, the control strategy gives consideration to the charging requirement of the energy storage equipment under the condition of meeting the external required power, so that the state of charge of the energy storage equipment is restored to a reasonable interval, and meanwhile, the charging power of the energy storage equipment is ensured not to exceed the maximum limit value in the charging process of the energy storage equipment, and the safe work of the energy storage equipment is ensured.
When the state of charge of the energy storage equipment is higher than a set threshold value, the control strategy preferentially selects the electric energy consumed by the energy storage equipment according to the condition of external required power, so that the state of charge of the energy storage equipment is restored to a reasonable interval, meanwhile, the discharge power of the energy storage equipment is ensured not to exceed the maximum limit value in the discharge process of the energy storage equipment, and the safe work of the energy storage equipment is ensured.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the methods of the present invention and the core ideas thereof; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (2)
1. A control method of a dual-shaft gas turbine hybrid power system, the control method being applied to a dual-shaft gas turbine hybrid power system that supplies power to an electrical load, the control method comprising:
acquiring the state of charge of energy storage equipment in the dual-shaft gas turbine hybrid power system, wherein the dual-shaft gas turbine hybrid power system comprises: the system comprises a motor, a gas compressor, a double-shaft gas turbine, a generator, energy storage equipment and an electric bus;
judging the state of charge, and outputting a first control strategy when the state of charge is within a set threshold range; outputting a second control strategy when the state of charge is less than or equal to the set threshold range; outputting a third control strategy when the state of charge is greater than or equal to the set threshold range, comprising:
acquiring the required power of the electricity load and judging the state of charge;
when the state of charge is within a set threshold value range, obtaining the first control strategy based on the fact that the output power of a generator in the dual-shaft gas turbine hybrid power system is equal to the required power; when the state of charge is less than or equal to the set threshold range, obtaining the second control strategy based on the generator output power being equal to the sum of the required power and the maximum output power of the energy storage device; when the state of charge is greater than or equal to the set threshold range, outputting maximum output power based on the energy storage device, wherein the generator output power is equal to the required power minus the maximum output power, so as to obtain the third control strategy;
the first control strategy is: the output power of a generator in the double-shaft gas turbine hybrid power system is equal to the required power, a motor in the double-shaft gas turbine hybrid power system outputs a first motor reference rotating speed, a low-voltage shaft in the double-shaft gas turbine hybrid power system outputs a first low-voltage shaft reference rotating speed, and a generator in the double-shaft gas turbine hybrid power system outputs a first generator reference torque;
the second control strategy is: the output power of the generator in the double-shaft gas turbine hybrid power system is equal to the sum of the required power and the maximum output power of the energy storage device, the generator in the double-shaft gas turbine hybrid power system supplies power for the electricity load and simultaneously charges the energy storage device, the low-voltage shaft in the double-shaft gas turbine hybrid power system outputs a second low-voltage shaft reference rotating speed, and the generator in the double-shaft gas turbine hybrid power system outputs a second generator reference torque;
the third control strategy is: the energy storage device outputs maximum output power, the output power of a generator in the double-shaft gas turbine hybrid power system is equal to the required power minus the maximum output power, a low-voltage shaft in the double-shaft gas turbine hybrid power system outputs a third low-voltage shaft reference rotating speed, and a generator in the double-shaft gas turbine hybrid power system outputs a third generator reference torque;
setting a state threshold value 0 < a1 < a2 < a3 < 1;
the set threshold range is greater than a1 and less than a3;
after the first control strategy is executed for a set time, returning to the step of judging the state of charge, and outputting the first control strategy when the state of charge is within a set threshold range; outputting a second control strategy when the state of charge is less than or equal to the set threshold range; outputting a third control strategy "when the state of charge is greater than or equal to the set threshold range;
after the second control strategy is executed for the set time, judging whether the state of charge is greater than or equal to a2, if not, continuing to execute the second control strategy, if so, returning to the step of judging the state of charge, and when the state of charge is within a set threshold value range, outputting a first control strategy; outputting a second control strategy when the state of charge is less than or equal to the set threshold range; outputting a third control strategy "when the state of charge is greater than or equal to the set threshold range;
after the third control strategy is executed for the set time, judging whether the state of charge is smaller than or equal to a2, if not, continuing to execute the third control strategy, if so, returning to the step of judging the state of charge, and when the state of charge is within a set threshold value range, outputting a first control strategy; outputting a second control strategy when the state of charge is less than or equal to the set threshold range; outputting a third control strategy "when the state of charge is greater than or equal to the set threshold range;
the dual-shaft gas turbine hybrid system is controlled based on the first control strategy, the second control strategy, and the third control strategy.
2. A control system for a dual-shaft gas turbine hybrid system, the control system being applied to a dual-shaft gas turbine hybrid system that powers an electrical load, the control system comprising:
the data acquisition module acquires the state of charge of energy storage equipment in the double-shaft gas turbine hybrid power system, and the double-shaft gas turbine hybrid power system comprises: the system comprises a motor, a gas compressor, a double-shaft gas turbine, a generator, energy storage equipment and an electric bus;
the control module is used for judging the state of charge, and outputting a first control strategy when the state of charge is within a set threshold range; outputting a second control strategy when the state of charge is less than or equal to the set threshold range; outputting a third control strategy when the state of charge is greater than or equal to the set threshold range; controlling the dual-shaft gas turbine hybrid system based on the first control strategy, the second control strategy, and the third control strategy;
the control module includes: a main controller, a motor controller, a rotational speed controller and a generator controller;
the data acquisition module acquires the required power of the power utilization load; the main controller judges the state of charge;
when the state of charge is within a set threshold range, the main controller outputs a first control strategy; when the state of charge is less than or equal to the set threshold range, the master controller outputs a second control strategy; when the state of charge is greater than or equal to the set threshold range, the master controller outputs a third control strategy;
the motor controller controlling a motor output first motor reference speed in the dual-shaft gas turbine hybrid system based on the first control strategy; the rotating speed controller controls a low-pressure shaft in the double-shaft gas turbine hybrid power system to output a first low-pressure shaft reference rotating speed based on the first control strategy, and the generator controller controls a generator in the double-shaft gas turbine hybrid power system to output a first generator reference torque based on the first control strategy;
the rotating speed controller controls the low-voltage shaft to output a second low-voltage shaft reference rotating speed based on the second control strategy, and the generator controller controls the generator to output a second generator reference torque based on the second control strategy;
the rotating speed controller controls the low-voltage shaft to output a third low-voltage shaft reference rotating speed based on the third control strategy, and the generator controller controls the generator to output a third generator reference torque based on the third control strategy;
setting a state threshold value 0 < a1 < a2 < a3 < 1;
the set threshold range is greater than a1 and less than a3;
after the first control strategy is executed for a set time, returning to the step of judging the state of charge, and outputting the first control strategy when the state of charge is within a set threshold range; outputting a second control strategy when the state of charge is less than or equal to the set threshold range; outputting a third control strategy "when the state of charge is greater than or equal to the set threshold range;
after the second control strategy is executed for the set time, judging whether the state of charge is greater than or equal to a2, if not, continuing to execute the second control strategy, if so, returning to the step of judging the state of charge, and when the state of charge is within a set threshold value range, outputting a first control strategy; outputting a second control strategy when the state of charge is less than or equal to the set threshold range; outputting a third control strategy "when the state of charge is greater than or equal to the set threshold range;
after the third control strategy is executed for the set time, judging whether the state of charge is smaller than or equal to a2, if not, continuing to execute the third control strategy, if so, returning to the step of judging the state of charge, and when the state of charge is within a set threshold value range, outputting a first control strategy; outputting a second control strategy when the state of charge is less than or equal to the set threshold range; and outputting a third control strategy when the state of charge is greater than or equal to the set threshold range.
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| CN202210126887.3A CN114412647B (en) | 2022-02-11 | 2022-02-11 | Control method and system of hybrid power system of double-shaft gas turbine |
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