CN114488779A - Power chain cascade feedforward control strategy and system device of gasoline power generation system - Google Patents
Power chain cascade feedforward control strategy and system device of gasoline power generation system Download PDFInfo
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Abstract
The invention provides a power chain cascade feedforward control strategy and a system device of a gasoline power generation system, wherein the control strategy comprises the following steps: establishing an inner ring PI control unit, an outer ring PI control unit and a feedforward control unit of a power generation system, and forming a cascade circuit by the inner ring PI control unit and the outer ring PI control unit; (II) acquiring a rotating speed signal, a load signal and a disturbance signal of the power generation system; and (III) based on the acquired signals, the inner loop PI control unit, the outer loop PI control unit and the feedforward control unit control the rotating speed of the power generation system in a feedback manner. The invention can avoid the problem that the rotating speed regulation is out of control and even flameout caused by insufficient power output response in the process of on-load starting and load switching of a power chain link of a power generation system.
Description
Technical Field
The invention belongs to the field of electric power, relates to feedforward control of a power generation system, and particularly relates to a power chain cascade feedforward control strategy and a system device of a gasoline power generation system.
Background
In general fuel oil power generation equipment, the oil supply amount is generally adjusted in a mechanical and hydraulic mode, so that the circulating oil supply amount of an engine can be automatically adjusted in real time according to the change of a load, the stable rotating speed of the engine is ensured, and more stable electric energy output capability can be obtained.
CN112909996A discloses a parallel operation control method and a controller for a gasoline generator set, which relate to the technical field of gasoline generator set control and comprise the following steps: the method comprises the steps of collecting parameters of the generator, calculating the rotating speed of the engine, controlling the voltage of the generator, controlling the grid-connected action and displaying the grid-connected parameters. The controller comprises a control unit (MCU), a data acquisition unit, an engine rotating speed control unit, a voltage regulation unit, a grid-connected control unit and a display unit.
CN112628005A discloses an engine speed closed-loop control method, which comprises: inputting the engine speed calibrated by the current vehicle into a proportional-integral-derivative (PID) controller to generate a feedback control parameter; generating a feedforward control parameter according to a feedforward controller physical model established in advance; summing the feedback control parameters and the feedforward control parameters to generate target control parameters; and controlling the engine of the current vehicle to rotate based on the target control parameter.
CN103312255A discloses a method and a device for controlling the speed of a permanent magnet synchronous motor, in which the speed loop adopts an active disturbance rejection control technology, the speed setting and the speed detection value are used as the input of a first-order active disturbance rejection controller, a tracking differentiator reasonably arranges the transition process, an extended state observer observes the actual value of the motor speed and estimates the total disturbance of the system, and then the output of the speed loop is obtained through the nonlinear state error feedback control rate; in addition, a load torque observer is designed through the detection values of the current and the speed, and the observed load torque is used as a reference input of the cross-axis current through a feedforward controller and the output of an active disturbance rejection controller.
In general fuel oil power generation equipment, the problem of rotating speed deviation measurement and amplification exists in the rotating speed adjusting process, or the problem of out-of-control rotating speed adjustment and even flameout exist, so that an automatic control system is particularly needed to efficiently adjust the rotating speed of a power generation system, which is a hot point and a key point in the future.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a power chain cascade feedforward control strategy and a system device of a gasoline power generation system, which adopt a proportional-derivative controller (PI) control unit to avoid the problem that the power chain link of the power generation system is out of control in rotating speed regulation and even flameout caused by insufficient power output response in the processes of load starting and load switching.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a power chain cascade feedforward control strategy for a gasoline power generation system, where the control strategy includes:
establishing an inner ring PI control unit, an outer ring PI control unit and a feedforward control unit of a power generation system, and forming a cascade circuit by the inner ring PI control unit and the outer ring PI control unit;
(II) acquiring a rotating speed signal, a load signal and a disturbance signal of the power generation system;
and (III) based on the acquired signals, the inner loop PI control unit, the outer loop PI control unit and the feedforward control unit control the rotating speed of the power generation system in a feedback manner.
The power chain cascade feedforward control strategy of the gasoline power generation system provided by the invention adopts cascade feedback, namely cascade control is carried out on an inner ring and an outer ring, the response time of a power chain link to load power change is reduced by introducing load current sampling, and meanwhile, closed-loop control is respectively carried out on a mechanical link (a power chain link) and an electrical link (a converter link) of the power generation system through the cascade control, so that the control benefit can be improved; and finally, the integral disturbance of a power chain link is considered, the load current feedforward control is carried out, and the adjusting precision is optimized.
The lightweight high-speed gasoline power generation system comprises a power chain link and a converter link, wherein the power chain link comprises but is not limited to an oil injection execution module for receiving instructions from an inner ring PI control unit, an outer ring PI control unit and a feedforward control unit, an engine module for driving and a generator for providing kinetic energy. The converter link includes, but is not limited to, a rectification module for supplying power to the regulation and control circuit unit, and an inverter ac output module for outputting ac. The inner ring PI control unit, the outer ring PI control unit and the feedforward control unit send instructions to the stepping motor driving module, so that the oil injection execution module of the power chain link acts, and the generated energy of the generator is controlled.
As a preferred technical solution of the present invention, the control strategy includes:
and acquiring a load signal of a converter link in the power generation system, transmitting the load signal to an outer ring PI control unit, acquiring a rotation speed variation by the outer ring PI control unit, and then transmitting the rotation speed variation to an inner ring PI control unit.
Preferably, the obtaining the rotation speed variation amount includes: and calculating the difference value between the load power output by the converter link in the power generation system and the steady-state power.
As a preferred technical solution of the present invention, the control strategy includes:
and the inner ring PI control unit controls the power generation system in a feedback manner according to the acquired rotating speed signal and the rotating speed variation from the outer ring PI control unit.
Preferably, the rotation speed signal comprises a reference rotation speed value and an actual rotation speed value of a power link in the power generation system.
It should be noted that, in the present invention, the inner ring PI control unit and the outer ring PI control unit are controlled in cascade, because the characteristics of the controlled object (obviously, the lightweight high-speed gasoline power generation system is divided into two parts, namely, a power chain link and a converter link) are not suitable for being adjusted as a whole, and therefore, the control object of the inner ring PI control unit is independently controlled, the control object of the inner ring PI control unit is the power chain link to regulate and control the rotation speed, and the outer ring PI control unit is based on the load power of the converter link, and the regulation object is a load (electrical), which is beneficial to improving the control benefit and shortening the reaction time.
As a preferred technical solution of the present invention, the control strategy includes:
and acquiring a disturbance signal of the power generation system, transmitting the disturbance signal to the feedforward control unit, and performing total disturbance estimation by the feedforward control unit according to the acquired disturbance signal, sending an instruction and performing feedback control on the accelerator opening of the power generation system.
Preferably, the disturbance signal includes a source-side disturbance signal and/or a load-side disturbance signal.
It should be noted that, aiming at the disturbance of the power generation system, the feedforward control unit can estimate or indirectly calculate the disturbance amount, estimate the switching time in advance and improve the control response time.
As a preferred technical solution of the present invention, the control strategy further includes:
the method comprises the steps of acquiring a rotating speed signal, a load signal and a disturbance signal of a power generation system by using a sensing unit, and respectively transmitting the rotating speed signal, the load signal and the disturbance signal to an inner ring PI control unit, an outer ring PI control unit and a feedforward control unit.
It should be noted that, the sensing unit in the invention acquires the rotation speed signal of the power link and transmits the rotation speed signal to the inner loop PI control unit; acquiring a load signal of a converter link, and transmitting the load signal to an outer loop PI control unit; and acquiring a disturbance signal of a converter link, and transmitting the disturbance signal to the feedforward control unit.
As a preferable aspect of the present invention, the controlling the rotation speed of the power generation system includes: the inner loop PI control unit and the feedforward control unit jointly send a motion instruction to control the opening degree of an accelerator in the power generation system in a feedback mode.
In a second aspect, the present invention provides a power chain cascade feedforward control system device of a gasoline power generation system, where the system device is used for the control strategy of the first aspect, the system device includes an inner loop PI control unit, an outer loop PI control unit, a feedforward control unit, and a power generation system, the power generation system is electrically connected to the inner loop PI control unit, the outer loop PI control unit, and the feedforward control unit, respectively, and the inner loop PI control unit and the outer loop PI control unit are connected in series.
According to the power chain cascade feedforward control system device of the gasoline power generation system, the inner ring PI control unit and the outer ring PI control unit are connected in a cascade mode, the response time of a power chain link to load power change is reduced by introducing load current sampling, the mechanical link and the electrical link of the power generation system can be controlled in a closed loop mode respectively, the control benefit can be improved, and meanwhile the adjustment precision is optimized through the control of the feedforward control unit.
As a preferred technical solution of the present invention, the power generation system includes a power chain unit and a converter unit electrically connected to each other, the power chain unit is electrically connected to the inner loop PI control unit, and the converter unit is electrically connected to the outer loop PI control unit and the feedforward control unit, respectively.
Preferably, the power chain unit comprises an oil injection execution module, an engine module and a generator module which are connected in sequence.
Preferably, the oil injection execution module is electrically connected with the inner ring PI control unit and the feedforward control unit respectively.
Preferably, the converter unit includes a rectifying module and an inverting ac output module.
As a preferred technical solution of the present invention, the system device further includes a sensing unit, and the sensing unit is electrically connected to the inner loop PI control unit, the outer loop PI control unit, the feedforward control unit, and the power generation system, respectively.
As a preferred technical solution of the present invention, the sensing unit includes a rotation speed sensor, a disturbance sensor and a power sensor.
Preferably, the rotation speed sensor is electrically connected with the inner ring PI control unit and the power chain unit respectively.
It should be noted that the rotation speed sensor in the present invention is electrically connected to the inner ring PI control unit and the generator module of the power chain unit, collects rotation speed information (voltage signal) of the generator module, and transmits the rotation speed information to the inner ring PI control unit, so that the inner ring PI control unit controls the oil injection execution module in a feedback manner.
Preferably, the power sensor is electrically connected to the outer loop PI control unit and the converter unit, respectively.
It should be noted that the power sensor in the present invention is electrically connected to the outer loop PI control unit and the inverter ac output module of the converter unit, collects load information (inverter output current) of the converter unit, and transmits the load information to the outer loop PI control unit.
Preferably, the disturbance sensor is electrically connected to the feedforward control unit and the converter unit, respectively.
It should be noted that the disturbance sensor in the present invention is electrically connected to the feedforward control unit and the rectification unit of the converter unit, collects disturbance information (dc bus current) of the converter unit, and transmits the disturbance information to the feedforward control unit, and then the feedforward control unit sends a motion command together with the inner loop PI control unit according to the information, so as to control and find the accelerator opening of the system.
The cascade feedforward control system device of the gasoline power generation system can be applied to the power generation system with high rotating speed (the rotating speed is more than or equal to 6500rpm) and light weight (the weight is less than or equal to 5kg), and can avoid the problem that the rotating speed regulation is out of control or even flameout caused by insufficient power output response in the processes of on-load starting and load switching of a power chain link of the power generation system.
The control strategy described in the present invention can also be understood by those skilled in the art as, but not limited to, a control method or a control process.
The system refers to an equipment system, or a production equipment.
Compared with the prior art, the invention has the beneficial effects that:
according to the power chain cascade feedforward control strategy and the system device of the gasoline power generation system, cascade control is performed on the inner ring and the outer ring, sampling of load current is introduced, response time of a power chain to load power change is reduced, and meanwhile, closed-loop control is performed on a mechanical link (a power chain link) and an electrical link (a converter link) of the power generation system through the cascade control, so that control benefits can be improved; finally, the integral disturbance of the power chain is considered, the feedforward control of the load current is carried out, the adjustment precision is optimized, and the problem that the rotating speed adjustment is out of control or even flameout caused by insufficient power output response in the process of on-load starting and load switching of the power chain link of the power generation system can be solved.
Drawings
Fig. 1 is a schematic circuit control diagram of a cascade feedforward control system device of a power generation system according to embodiment 1 of the present invention;
fig. 2 is a control route diagram of a power chain cascade feedforward control strategy of the lightweight high-speed gasoline power generation system according to application example 1 of the present invention.
Detailed Description
It is to be understood that in the description of the present invention, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be taken as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
It should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
In one embodiment, the present invention provides a power train cascade feedforward control strategy for a lightweight high-speed gasoline power generation system, wherein the control strategy comprises:
(1) establishing an inner ring PI control unit, an outer ring PI control unit and a feedforward control unit of the power generation system, and forming a cascade circuit by the inner ring PI control unit and the outer ring PI control unit;
(2) acquiring a rotating speed signal, a load signal and a disturbance signal of a power generation system;
(3) and based on the acquired signals, the inner loop PI control unit, the outer loop PI control unit and the feedforward control unit control the rotating speed of the power generation system in a feedback manner.
The power generation system comprises a power chain link and a converter link, wherein the power chain link comprises but is not limited to an oil injection execution module, an engine module and a generator, the oil injection execution module is used for receiving instructions from an inner ring PI control unit, an outer ring PI control unit and a feedforward control unit, and the engine module is used for driving the generator and the generator is used for providing kinetic energy. The converter link includes, but is not limited to, a rectifier module for supplying power to the regulation circuit unit, and an inverter ac output for outputting ac. The inner ring PI control unit, the outer ring PI control unit and the feedforward control unit send instructions to the stepping motor driving module, so that the oil injection execution module of the power chain link acts, and the generated energy of the generator is controlled.
Further, the control strategy includes: and acquiring a load signal of a converter link in the power generation system, transmitting the load signal to an outer ring PI control unit, acquiring a rotating speed variable quantity by the outer ring PI control unit, and then transmitting the rotating speed variable quantity to an inner ring PI control unit.
The obtaining the rotation speed variation includes: and calculating the difference value between the load power output by the converter link in the power generation system and the steady-state power.
Further, the control strategy comprises: and the inner ring PI control unit controls the power generation system in a feedback manner according to the acquired rotating speed signal and the rotating speed variation from the outer ring PI control unit.
The rotating speed signal comprises a reference rotating speed value and an actual rotating speed value of a power chain link in the power generation system.
The inner ring PI control unit and the outer ring PI control unit are subjected to cascade control, because the characteristics of a controlled object (a power generation system is obviously divided into a power chain link and a converter link) are not suitable for being adjusted as a whole, the control object of the inner ring PI control unit is the power chain link to regulate and control the rotating speed, the outer ring PI control unit is based on the load power of the converter link, and the regulated and controlled object is a load (electric), so that the control benefit is improved, and the reaction time is shortened.
Further, the control strategy comprises: and acquiring a disturbance signal of the power generation system, transmitting the disturbance signal to the feedforward control unit, and performing total disturbance estimation by the feedforward control unit according to the acquired disturbance signal, sending an instruction and performing feedback control on the accelerator opening of the power generation system.
The disturbance signal comprises a source end disturbance signal and/or a load end disturbance signal. According to the invention, aiming at the disturbance of the power generation system, the feedforward control unit can estimate the switching time in advance by estimating or indirectly calculating the disturbance quantity, so that the control reaction time is improved. The source end disturbance signal refers to a sudden change signal of the direct current bus current, and the load end disturbance signal refers to a sudden change signal of the load current.
Further, the control strategy further includes: the method comprises the steps of acquiring a rotating speed signal, a load signal and a disturbance signal of a power generation system by using a sensing unit, and respectively transmitting the rotating speed signal, the load signal and the disturbance signal to an inner ring PI control unit, an outer ring PI control unit and a feedforward control unit. The sensing unit acquires a rotating speed signal of a power chain link and transmits the rotating speed signal to the inner ring PI control unit; acquiring a load signal of a converter link, and transmitting the load signal to an outer loop PI control unit; and acquiring a disturbance signal of a converter link, and transmitting the disturbance signal to the feedforward control unit.
Further, the controlling the rotation speed of the power generation system includes: the inner loop PI control unit and the feedforward control unit jointly send a motion instruction to control the opening degree of an accelerator in the power generation system in a feedback mode.
In another embodiment, the present invention provides a power chain cascade feedforward control system device of a gasoline power generation system, where the system device is used in the control strategy of one embodiment, the system device includes an inner loop PI control unit, an outer loop PI control unit, a feedforward control unit, and a power generation system, the power generation system is electrically connected to the inner loop PI control unit, the outer loop PI control unit, and the feedforward control unit, respectively, and the inner loop PI control unit and the outer loop PI control unit are connected in series.
According to the cascade feedforward control system device for the power chain of the gasoline power generation system, the inner ring PI control unit and the outer ring PI control unit are connected in a cascade mode, the response time of the power chain to the load power change is reduced by introducing the sampling of the load current, the closed-loop control of the mechanical link and the electrical link of the power generation system can be realized, the control benefit can be improved, and the adjustment precision is optimized through the control of the feedforward control unit.
Furthermore, the power generation system comprises a power chain unit and a converter unit which are electrically connected, wherein the power chain unit is respectively and electrically connected with the inner ring PI control unit and the feedforward control unit, and the converter unit is electrically connected with the outer ring PI control unit.
The power chain unit comprises an oil injection execution module, an engine module and a generator module which are sequentially connected. The oil injection execution module is respectively and electrically connected with the inner ring PI control unit and the feedforward control unit. The converter unit comprises a rectifying module and an inverting alternating current output module.
Furthermore, the system device also comprises a sensing unit which is respectively and electrically connected with the inner ring PI control unit, the outer ring PI control unit, the feedforward control unit and the power generation system.
Furthermore, the sensing unit comprises a rotating speed sensor, a disturbance sensor and a power sensor.
And the rotating speed sensor is respectively and electrically connected with the inner ring PI control unit and the power chain unit. The rotating speed sensor is electrically connected with the inner ring PI control unit and the generator module of the power chain unit, collects rotating speed information (voltage signals) of the generator module and transmits the rotating speed information to the inner ring PI control unit, so that the inner ring PI control unit controls the oil injection execution module in a feedback mode.
The power sensor is respectively and electrically connected with the outer ring PI control unit and the converter unit. The power sensor is electrically connected with the outer ring PI control unit and the inversion alternating current output module of the converter unit, collects load information (inversion output current) of the converter unit and transmits the load information to the outer ring PI control unit.
The disturbance sensor is respectively and electrically connected with the feedforward control unit and the converter unit. The disturbance sensor is electrically connected with the feedforward control unit and the rectifying unit of the converter unit, disturbance information (direct current bus current) of the converter unit is collected and transmitted to the feedforward control unit, and then the feedforward control unit and the inner ring PI control unit jointly send a motion instruction according to the information so as to control and find the opening degree of the accelerator of the system.
Example 1
The embodiment provides a power chain cascade feedforward control system device of a gasoline power generation system, which comprises an inner ring PI control unit, an outer ring PI control unit, a feedforward control unit and a power generation system, wherein the inner ring PI control unit and the outer ring PI control unit are connected in series.
As shown in fig. 1, the power generation system includes an oil injection execution module, a gasoline engine module, a three-phase permanent magnet generator module, a rectification module, and an inverter ac output module for outputting ac, which are connected in sequence. The gasoline engine module and the three-phase permanent magnet generator move coaxially, and then the high-quality alternating current power supply and the high-quality direct current power supply are obtained through the rear-stage rectification module and the inversion alternating current output module.
The cascade feedforward control system device of the power generation system further comprises a sensing unit, wherein the sensing unit comprises a rotating speed sensor, a disturbance sensor and a power sensor, and the rotating speed sensor is respectively and electrically connected with the inner ring PI control unit and the three-phase permanent magnet generator module and used for transmitting a rotating speed signal to the inner ring PI control unit; the power sensor is respectively and electrically connected with the outer ring PI control unit and the inversion alternating current output module and is used for transmitting a load power signal to the outer ring PI control unit; the disturbance sensor is respectively and electrically connected with the feedforward control unit and the rectification module and used for transmitting the direct current bus current to the feedforward control unit.
Application example 1
In the application example, the power chain cascade feedforward control system device of the gasoline power generation system provided in embodiment 1 is adopted to regulate and control a lightweight high-speed gasoline power generation system (the rotating speed is more than or equal to 6500rpm, and the weight is less than or equal to 5 kg).
As shown in fig. 2, the control strategy for the light-weight high-speed gasoline power generation system includes the following steps:
(1) establishing an inner ring PI control unit, an outer ring PI control unit and a feedforward control unit of the power generation system, and forming a cascade circuit by the inner ring PI control unit and the outer ring PI control unit;
(2) the system comprises a rotating speed sensor, a power sensor, a disturbance sensor, a feed-forward control unit, an inner ring PI control unit, an inverter output module, a rectifier module, an inner ring PI control unit, a power sensor, a power output module and a three-phase permanent magnet generator module, wherein the rotating speed sensor acquires a rotating speed signal of the three-phase permanent magnet generator module and transmits the rotating speed signal to the inner ring PI control unit;
(3) the outer loop PI control unit calculates the difference value between the load power and the steady state power of a converter link in the power generation system according to the obtained load power signal and transmits the difference value to the inner loop PI control unit, the inner loop PI control unit receives the obtained rotating speed signal and integrates the signal from the outer loop PI control unit, meanwhile, the feedforward control unit estimates the disturbance quantity according to the obtained disturbance signal and sends a motion instruction together with the inner loop PI control unit to control the opening degree of an accelerator in the power generation system in a feedback mode, and therefore the generated energy of the three-phase permanent magnet generator is controlled in a feedback mode.
According to the power chain cascade feedforward control strategy of the gasoline power generation system, cascade control is performed on the inner ring and the outer ring, sampling of load current is introduced, response time of a power chain to load power change is shortened, and meanwhile, closed-loop control is performed on a mechanical link and an electrical link of the power generation system through cascade control, so that control benefits can be improved; the method has the advantages that the integral disturbance of the power chain is considered, the feedforward control of the load current is carried out, the adjustment precision is optimized, and the problem that the rotating speed adjustment is out of control or even flameout caused by insufficient power output response in the process of on-load starting and load switching of the power chain link of the power generation system can be solved.
The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.
Claims (10)
1. A power train cascade feedforward control strategy for a gasoline power generation system, the control strategy comprising:
establishing an inner ring PI control unit, an outer ring PI control unit and a feedforward control unit of a power generation system, and forming a cascade circuit by the inner ring PI control unit and the outer ring PI control unit;
(II) acquiring a rotating speed signal, a load signal and a disturbance signal of the power generation system;
and (III) based on the acquired signals, the inner loop PI control unit, the outer loop PI control unit and the feedforward control unit control the rotating speed of the power generation system in a feedback manner.
2. The control strategy of claim 1, wherein the control strategy comprises:
acquiring a load signal of a converter link in a power generation system, transmitting the load signal to an outer ring PI control unit, acquiring a rotation speed variation by the outer ring PI control unit, and then transmitting the rotation speed variation to an inner ring PI control unit;
preferably, the obtaining the rotation speed variation amount includes: and calculating the difference value between the load power output by the converter link in the power generation system and the steady-state power.
3. A control strategy according to claim 1 or 2, characterized in that the control strategy comprises:
the method comprises the steps that a rotating speed signal of a power chain link in the power generation system is obtained and transmitted to an inner ring PI control unit, and the inner ring PI control unit controls the power generation system in a feedback mode according to the obtained rotating speed signal and a rotating speed variable quantity from an outer ring PI control unit;
preferably, the rotation speed signal comprises a reference rotation speed value and an actual rotation speed value of a power link in the power generation system.
4. A control strategy according to any one of claims 1-3, characterized in that said control strategy comprises:
acquiring a disturbance signal of the power generation system, transmitting the disturbance signal to a feedforward control unit, and performing total disturbance estimation by the feedforward control unit according to the acquired disturbance signal, sending an instruction and performing feedback control on the accelerator opening of the power generation system;
preferably, the disturbance signal includes a source-side disturbance signal and/or a load-side disturbance signal.
5. The control strategy according to any one of claims 1-4, further comprising:
the method comprises the steps of acquiring a rotating speed signal, a load signal and a disturbance signal of a power generation system by using a sensing unit, and respectively transmitting the rotating speed signal, the load signal and the disturbance signal to an inner ring PI control unit, an outer ring PI control unit and a feedforward control unit.
6. The control strategy according to any one of claims 1-5, wherein said controlling the rotational speed of the power generation system comprises: the inner loop PI control unit and the feedforward control unit jointly send a motion instruction to control the opening degree of an accelerator in the power generation system in a feedback mode.
7. A power chain cascade feedforward control system device of a gasoline power generation system, the system device is used for the control strategy of any one of claims 1 to 6, and the system device is characterized by comprising an inner ring PI control unit, an outer ring PI control unit, a feedforward control unit and a power generation system, the power generation system is respectively and electrically connected with the inner ring PI control unit, the outer ring PI control unit and the feedforward control unit, and the inner ring PI control unit and the outer ring PI control unit are connected in series.
8. The system apparatus of claim 7, wherein the power generation system comprises a power chain unit and a converter unit electrically connected to each other, the power chain unit is electrically connected to the inner loop PI control unit, and the converter unit is electrically connected to the outer loop PI control unit and the feedforward control unit, respectively;
preferably, the power chain unit comprises an oil injection execution module, an engine module and a generator module which are connected in sequence;
preferably, the oil injection execution module is respectively and electrically connected with the inner ring PI control unit and the feedforward control unit;
preferably, the converter unit includes a rectifying module and an inverting ac output module.
9. The system device according to claim 7 or 8, further comprising a sensing unit, wherein the sensing unit is electrically connected to the inner loop PI control unit, the outer loop PI control unit, the feedforward control unit and the power generation system respectively.
10. The system device of claim 9, wherein the sensing unit comprises a rotation speed sensor, a disturbance sensor and a power sensor;
preferably, the rotation speed sensor is respectively and electrically connected with the inner ring PI control unit and the power chain unit;
preferably, the power sensor is electrically connected with the outer ring PI control unit and the converter unit respectively;
preferably, the disturbance sensor is electrically connected to the feedforward control unit and the converter unit, respectively.
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