CN117231375A - Diesel generating set parallel control system based on PWM control - Google Patents
Diesel generating set parallel control system based on PWM control Download PDFInfo
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Abstract
The application discloses a diesel generator set parallel control system based on PWM control, which belongs to the technical field of generator sets and comprises a main control center, an input sensor, a control unit, a PWM modulator and an output sensor. The beneficial effects of the application are as follows: the control method is based on a PWM technology, and the control unit controls the power output of each diesel generator set by adjusting the duty ratio of PWM signals according to the required power output. In the diesel generator sets running in parallel, the control unit can accurately control the load of each generator set according to the output power distribution proportion of each generator set.
Description
Technical Field
The application relates to the technical field of generator sets, in particular to a diesel generator set parallel control system based on PWM control.
Background
The volume of the generator set of the diesel engine is reduced, the temperature is rapidly increased, and the ignition point of diesel oil is reached. The diesel oil is ignited, the mixed gas burns vigorously, the volume expands rapidly, and the piston is pushed to move downwards, which is called 'work'. The cylinders sequentially apply work according to a certain sequence, and the thrust acting on the piston is changed into force for pushing the crankshaft to rotate through the connecting rod, so that the crankshaft is driven to rotate. By using the principle of 'electromagnetic induction', the generator outputs induced electromotive force, and current can be generated through a closed load loop. Only the most basic operating principle of the generator set will be described here. A series of diesel and generator control, protection devices and circuits are also required to obtain a usable, stable power output.
In modern industrial and commercial applications, a stable power supply is of paramount importance. Diesel generator sets are widely used in the fields of temporary power supply, backup power supply and independent power stations. However, in some high power demand scenarios, the output of a single diesel-electric generator set may not meet the demand. To address this problem, multiple diesel-electric sets may be operated in parallel to provide greater power output. However, when a plurality of diesel generator sets are operated in parallel, the running state of the parallel diesel generator sets cannot be accurately controlled, so the application provides a diesel generator set parallel control system based on PWM control.
Disclosure of Invention
The application aims to provide a diesel generator set parallel control system based on PWM control, the control method is based on a PWM technology, and a control unit controls the power output of each diesel generator set by adjusting the duty ratio of a PWM signal according to the required power output. In the parallel operation diesel generator sets, the control unit can accurately control the load of each generator set according to the output power distribution proportion of each generator set, so as to solve the problem that the running state of the parallel diesel generator sets cannot be accurately controlled when a plurality of diesel generator sets are operated in parallel in the background technology.
In order to achieve the above purpose, the present application provides the following technical solutions: the parallel control system of the diesel generator set based on PWM control comprises a main control center, an input sensor, a control unit, a PWM modulator and an output sensor,
an input sensor: the system is used for monitoring the input current and the output power of the parallel diesel generator set;
and a control unit: the method comprises the steps of being responsible for receiving data input to a sensor and generating PWM signals according to a preset control strategy;
a PWM modulator: receiving a PWM signal from a control unit and correspondingly controlling the power output of the parallel diesel generator set;
an output sensor: the method is used for monitoring the output current and power of the parallel diesel generator set in real time.
As a further scheme of the application: the input sensor includes:
a current sensor: for monitoring and measuring the input current of each generator set, each generator set being equipped with an independent current sensor;
a power sensor: the power sensor is used for monitoring and measuring the output power of the parallel diesel generator sets, and each parallel diesel generator set is provided with an independent power sensor;
temperature sensor: for monitoring and measuring the temperature variation of the parallel diesel-electric generator set, the temperature sensor is arranged on a key component of the generator set;
a pressure sensor: for monitoring and measuring changes in oil pressure and air pressure of a diesel generator set, pressure sensors are installed in a diesel fuel supply system and a lubricating oil system.
As still further aspects of the application: the control unit also comprises the following sub-modules:
and the data acquisition and processing module is used for: the control unit is responsible for receiving and processing the data provided by the input sensor unit;
the control strategy generation module: based on a preset control strategy and the current system state, the control unit generates a PWM signal to control the power output of the parallel diesel generator set;
a PWM signal generation module: the control unit generates a PWM signal by using a PWM modulation technology;
and the fault monitoring and protecting module is used for: the control unit is responsible for monitoring the running state of the parallel diesel generator set in real time;
remote monitoring and operation module: the control unit can communicate with an external monitoring system to realize remote monitoring and operation of the system.
As still further aspects of the application: the PWM modulator comprises the following sub-modules:
pulse width modulation module: the PWM modulator adopts a pulse width modulation technology, and realizes accurate control of output power by controlling the pulse width of a signal;
and an accurate control module: the PWM modulator has high-precision control capability and generates accurate PWM signals according to data and instructions provided by the control unit;
high-speed switching device: the PWM modulator uses a high-speed switching device to realize the cutting-off and the starting of a power supply;
overcurrent protection module: the PWM modulator also has an overcurrent protection function;
an adjustable frequency module: the PWM modulator also has the characteristic of adjustable frequency;
and a protection module: the PWM modulator should also have a fault protection function to ensure safe operation of the system;
an input module: receiving a reference power value and a feedback signal;
a comparator: for comparing the reference power value with the feedback signal to generate an error signal;
and a control algorithm module: calculating pulse width according to the error signal, wherein a control algorithm is based on PID control, and the control algorithm is based on fuzzy logic control;
and an output module: the calculated pulse width is converted into a pulse width modulation signal, the output module adopts a timer and a counter to generate a periodical pulse signal, and the output module controls the pulse width by adjusting the duty ratio of the pulse.
As still further aspects of the application: the output sensor further comprises the following sub-modules:
and (3) detecting output parameters: the output sensor unit is used for detecting the operation data through a sensor arranged on an output line of the generator set;
accurate measurement: the output sensor unit has high-accuracy measurement capability and can accurately measure output parameters;
reliability and durability: the output sensor unit needs to have durability and reliability to cope with a severe working environment and long-time operation;
data transmission and communication: the output sensor unit can transmit the measurement data to the control unit in a wired or wireless communication mode;
fault detection and protection: the output sensor unit has fault detection and protection functions;
calibration and auto-correction: to ensure accuracy of the measurement results, the output sensor unit should be provided with calibration and automatic correction functions.
Compared with the prior art, the application has the beneficial effects that:
1. by monitoring the data of the input and output sensors, the control unit can timely detect any faults and take corresponding protection measures, such as shutdown protection and automatic switching of the standby generator set;
2. the control unit realizes power balance according to the output power distribution proportion of each generator set, and avoids overlarge or overlarge load of one generator set;
3. through the connection with an external monitoring system, remote monitoring and operation of the parallel diesel generator set can be realized, and the management efficiency is improved;
4. based on PWM control: the accurate control of the diesel generator set is realized by using a PWM technology, and the stability and the power distribution balance are improved;
5. fault detection and protection functions: the data of the input and output sensors are monitored in real time, so that faults are detected and processed in time, and the stable operation of the generator set is protected.
The control method is based on a PWM technology, and the control unit controls the power output of each diesel generator set by adjusting the duty ratio of PWM signals according to the required power output. In the diesel generator sets running in parallel, the control unit can accurately control the load of each generator set according to the output power distribution proportion of each generator set.
Drawings
Fig. 1 is a schematic diagram of a control system structure of a diesel generator set parallel control system based on PWM control.
Detailed Description
The following description of the embodiments of the present application 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 application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type, and are not limited to the number of objects, such as the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.
In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
In the description of the present application, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "disposed" are to be construed broadly, and may be fixedly connected, disposed, or detachably connected, disposed, or integrally connected, disposed, for example. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1, in the embodiment of the application, a parallel control system of a diesel generator set based on PWM control comprises a main control center, an input sensor, a control unit, a PWM modulator and an output sensor,
an input sensor: the system is used for monitoring the input current and the output power of the parallel diesel generator set;
and a control unit: the method comprises the steps of being responsible for receiving data input to a sensor and generating PWM signals according to a preset control strategy;
a PWM modulator: receiving a PWM signal from a control unit and correspondingly controlling the power output of the parallel diesel generator set;
an output sensor: the method is used for monitoring the output current and power of the parallel diesel generator set in real time.
The input sensor unit is one of key components of the control system, is mainly used for monitoring input current and output power of the parallel diesel generator set, and provides accurate data for the control unit.
The input sensor unit includes the following sensors:
a current sensor: for monitoring and measuring the input current to each generator set. Each generator set is provided with an independent current sensor which can accurately sense the input current change of the generator set and provide real-time current data for the control unit. The current sensor may employ non-contact and high-precision measurement techniques, such as hall effect sensors or current transformers.
A power sensor: the device is used for monitoring and measuring the output power of the parallel diesel generator set. Each parallel diesel generator set is provided with an independent power sensor, which can accurately measure the output power of each generator set and transmit data to the control unit in real time. The power sensor may employ a high-precision power measurement device, such as an electrical load sensor or a power analyzer.
Temperature sensor: the temperature sensor is used for monitoring and measuring the temperature change of the parallel diesel generator set. The temperature sensors are arranged on key components of the generator set, such as cables, engines, generators and transformers. The sensor senses the temperature change and transmits data to the control unit. These data are important for judging the operation state and fault diagnosis of the parallel diesel generator set. The temperature sensor may employ a thermocouple sensor, a temperature sensing resistor, or an infrared sensor.
A pressure sensor: the device is used for monitoring and measuring the changes of oil pressure, air pressure and the like of the diesel generating set. Pressure sensors are installed in the diesel fuel supply system and the lubricating oil system, and can sense changes in oil pressure and air pressure in real time and transmit data to the control unit. Such data helps to monitor the operating state of the system and to discover and handle potential faults in a timely manner. The pressure sensor may employ a piezoelectric sensor, a capacitive sensor, or a pressure sensitive resistor.
The design of the input sensor unit requires a compromise of accuracy, reliability and durability. By accurately measuring parameters such as input current, output power, temperature, pressure and the like, the control unit can generate PWM signals according to a required control strategy, accurately control the running state and power output of the parallel diesel generator set, and improve the stability and reliability of the system.
Preferably: the control unit is one of the core components of the system, is responsible for receiving data provided by the input sensor unit, generates PWM signals according to a preset control strategy and controls the power output of the parallel diesel generator set.
The control unit functions as follows:
and the data acquisition and processing module is used for: the control unit is responsible for receiving and processing the data provided by the input sensor unit. The control unit converts the sensor data of current, power, temperature and pressure etc. into a digital signal that can be processed by using an analog-to-digital converter or other related technology. Through a data processing algorithm, the control unit can accurately calculate the running state parameters of the parallel diesel generator set, such as load distribution proportion, power loss, system efficiency and the like.
The control strategy generation module: based on a preset control strategy and the current system state, the control unit generates a PWM signal to control the power output of the parallel diesel generator set. According to the load demand and the power distribution proportion, the control unit can adjust the output power of each generator set in real time so as to realize power balance and stable operation of the system.
A PWM signal generation module: the control unit generates the PWM signal using a PWM modulation technique. The Duty Cycle (Duty Cycle) of the PWM signal represents the output power ratio of the generator set. According to the control strategy and the load demand, the control unit calculates and controls the duty ratio of the PWM signal, and controls the output power of the parallel diesel generator set by outputting the signal to the PWM modulator.
And the fault monitoring and protecting module is used for: the control unit is responsible for monitoring the running state of the parallel diesel generator set in real time, and the running state comprises data such as current, power, temperature and pressure. When abnormal conditions such as unbalanced load, overload, overtemperature, low oil pressure and the like are found, the control unit can take corresponding measures, such as shutdown protection, alarm and automatic switching of the standby generator set, so as to ensure safe operation of the system.
Remote monitoring and operation module: the control unit can communicate with an external monitoring system to realize remote monitoring and operation of the system. Through connection with a network or wireless communication equipment, monitoring personnel can acquire various states and parameters of the parallel diesel generator set in real time. Meanwhile, the power distribution proportion can be adjusted, the load demand can be adjusted and the like through the remote operation control unit, so that the demands of practical application can be met.
The control unit needs to have high performance data processing capability, reliable algorithm design and flexible control strategy to ensure stability, reliability and efficiency of the system. Meanwhile, interfaces and communication modes with other systems are also required to be supported, so that centralized management and control of the generator set are realized.
Preferably: the PWM modulator is an important component of a control system and is used for generating PWM signals and controlling the output power of the parallel diesel generator set.
The PWM modulator has the following features and functions:
pulse width modulation module: the PWM modulator adopts a pulse width modulation technology, and realizes accurate control of output power by controlling the pulse width of a signal. The modulator adjusts the duty cycle of the PWM signal according to instructions from the control unit to achieve the desired power output. A higher duty cycle indicates a higher output power, while a lower duty cycle indicates a lower output power.
And an accurate control module: the PWM modulator has high precision control capability and generates accurate PWM signals based on data and instructions provided by the control unit. By adjusting the width and frequency of the pulse, the PWM modulator can realize fine granularity control of the output power of the parallel diesel generator set so as to meet different load demands.
High-speed switching device: PWM modulators use high-speed switching devices (such as MOSFETs or igbt) to turn power off and on. The switching devices can quickly respond to the control signals and effectively adjust the on-off time of the power supply, so that the output power is accurately controlled.
Overcurrent protection module: the PWM modulator also has an overcurrent protection function. Upon detecting that the parallel diesel-electric generator set output current exceeds the rated range, the modulator may immediately take action, such as reducing the duty cycle of the PWM signal or active shutdown, to prevent damage to the generator set and other system components.
An adjustable frequency module: the PWM modulator also has the characteristic of adjustable frequency. The modulator may adjust the frequency of the PWM signal according to system requirements and load requirements. Higher frequencies can reduce the size and power consumption of the switching device while providing finer control; lower frequencies may increase the efficiency of the system.
And a protection module: the PWM modulator should also have a failsafe function to ensure safe operation of the system. When faults such as over-temperature or abnormal voltage are detected, the modulator should be able to send out an alarm, automatically stop or switch to a standby system in time to prevent the faults from further expanding.
The design of PWM modulators requires a compromise of high accuracy, high switching capability and reliability. Through an accurate pulse modulation technology, the PWM modulator can realize accurate control of the output power of the parallel diesel generator set, and stability and efficiency of the system are improved.
Preferably: the output sensor unit is an important component of the system and is used for detecting output parameters of the parallel diesel generator set, such as current, voltage, power, frequency and the like. It provides a reliable feedback signal to the control unit to enable accurate control and monitoring of the power output.
The output sensor unit has the following functions and characteristics:
and (3) detecting output parameters: the output sensor unit monitors parameters such as current, voltage, power and the like in real time through a sensor arranged on an output line of the generator set. The sensors may be non-contact sensors such as current transformers, voltage transformers, power sensors, etc., or may be sensors mounted directly on the output lines.
Accurate measurement: the output sensor unit has high-accuracy measurement capability and can accurately measure output parameters. By employing a high precision sensor and accurate measurement circuitry, the output sensor unit may provide stable, reliable output parameter measurements.
Reliability and durability: the output sensor unit needs to have durability and reliability to cope with a severe working environment and long-term operation. This includes resistance to environmental factors such as temperature, humidity, shock and electromagnetic interference. At the same time, the structural design should be able to prevent the sensor from being physically damaged by the outside world.
Data transmission and communication: the output sensor unit may transmit the measurement data to the control unit by means of wired or wireless communication. The output sensor unit can realize real-time data transmission and flexible communication through a high-speed data transmission interface with the control unit.
Fault detection and protection: the output sensor unit has fault detection and protection functions. When a sensor fault or abnormal measurement is found, the output sensor unit should give an alarm or output a fault signal in time to prompt an operator to repair or replace. Meanwhile, the output sensor unit also has the functions of monitoring and protecting the current and voltage ranges so as to prevent the damage to the system caused by overload, voltage abnormality and other conditions.
Calibration and auto-correction: to ensure accuracy of the measurement results, the output sensor unit should be provided with calibration and automatic correction functions. The sensor can be calibrated regularly, measurement errors can be corrected, and automatic adjustment can be performed according to system actual measurement data and environmental changes so as to maintain high-precision measurement performance of the sensor unit.
The design of the output sensor unit requires a comprehensive consideration of measurement accuracy, reliability and adaptability. By accurately measuring the output parameters of the parallel diesel generator set, the output sensor unit can provide accurate and reliable feedback signals for the control unit, so that the accurate control and protection of power output are realized.
Preferably: the control unit in the application adopts the following specific control method to realize the control of the output power of the parallel diesel generator set:
control strategy selection: the control unit firstly selects a corresponding control strategy according to the system demand and the load change condition. Power control may be implemented using Pulse Width Modulation (PWM), PID control, fuzzy logic control, or other advanced control algorithms.
Reference power setting: the control unit sets the reference power value according to the load demand and the system demand. This setting may be obtained by means of user input, automatic adjustment or external signal feedback.
Real-time measurement feedback: the control unit measures and acquires output parameters of the generator set, such as current, voltage, power, frequency and the like, in real time through the output sensor unit. These measurements are compared as feedback signals with a set reference power value and used for calculation of the control algorithm.
Control signal generation: and the control unit generates a corresponding control signal by adopting a corresponding control algorithm according to the measurement feedback value and the set reference power value. For example, in Pulse Width Modulation (PWM) control, the control unit calculates an appropriate pulse width from the error signal, thereby adjusting the duty ratio of the PWM signal.
And (3) adjusting control parameters: the control unit can also automatically adjust control parameters according to the dynamic characteristics and the load change condition of the system so as to improve the control effect and the stability. By monitoring and analyzing the system response, the control unit can adjust the control parameters in real time and achieve optimal power regulation.
Process monitoring and fault handling: the control unit can monitor the running state of the system in real time and process the abnormal conditions. When the system exceeds the safe working range or fails, the control unit can take corresponding protection measures, such as reducing power output, automatically stopping or switching standby systems and the like, so as to protect the safety of the generator set and other key equipment.
Man-machine interface and communication: the control unit can also interact with human-computer interface of operator, and provide system status information, alarm information and operation guidance by display screen, keys or touch screen. Meanwhile, the control unit can also carry out data transmission and remote control with other systems, monitoring equipment or remote management platforms through a communication interface.
By adopting the specific control method, the control unit can realize accurate and stable control of the output power of the parallel diesel generator set. This helps to improve the reliability, efficiency and operational safety of the power generation system.
In the application, the PWM modulator is a key component of the control unit and is used for realizing accurate adjustment of the output power of the parallel diesel generator set. The following are the working logic and calculation methods of the PWM modulator:
working logic:
receiving an input signal: the PWM modulator first receives a reference power value and a feedback signal from the control unit, which are used to calculate the control signal.
A comparator: the error signal is obtained by comparing the reference power value with the feedback signal.
Control algorithm: based on the error signal and the control algorithm, the PWM modulator calculates the appropriate pulse width.
Control signal output: and converting the calculated control signal into a pulse width modulation signal, and outputting the pulse width modulation signal to a power converter or an inverter for controlling power output.
The calculation method comprises the following steps:
setting a reference power value: the control unit sets the reference power value according to the load demand and the system demand. This is typically achieved by means of user input, automatic adjustment or external signal feedback.
Feedback signal acquisition: the PWM modulator measures and acquires output parameters of the generator set, such as current, voltage, power, frequency and the like, in real time through the output sensor unit as feedback signals.
Calculating an error signal: the error signal is the difference between the reference power value and the feedback signal. The usual calculation method is error = reference power value-feedback signal.
Control signal calculation: based on the control algorithm and the error signal, the PWM modulator calculates the appropriate pulse width. This involves adjusting the duty cycle of the pulse width in accordance with the error signal to achieve the desired output power adjustment.
Control signal output: the PWM modulator converts the calculated control signal into a pulse width modulation signal and outputs the pulse width modulation signal to the power converter or the inverter. Typically, this is done by generating a periodic pulse signal using a timer and a counter, and adjusting the width of the pulse according to the calculated duty cycle.
The working logic and the calculation method of the PWM modulator enable the control unit to adjust the pulse width in real time according to the reference power and the feedback signal, and accurate control of the output power of the parallel diesel generator set is achieved.
In the application, the control unit and the PWM modulator realize the accurate control of the output power of the parallel diesel generator set through linkage work. The following is a linkage working method of the control unit and the PWM modulator:
the working method of the control unit comprises the following steps:
receiving an input signal: the control unit first receives signals from load demands and system demands, including reference power values, load changes, system status, etc.
Control strategy selection: based on the received input signals, the control unit selects a corresponding control strategy, such as Pulse Width Modulation (PWM), PID control, fuzzy logic control, etc.
Reference power setting: the control unit sets a reference power value based on the load demand and system requirements, which is passed to the PWM modulator as an input signal.
And (3) adjusting control parameters: according to the dynamic characteristics and the load change condition of the system, the control unit adjusts the control parameters in real time so as to improve the control effect and stability.
Generating a control signal: the control unit calculates a corresponding control signal by combining the reference power value and the feedback signal through a control algorithm, and the control signal is transmitted to the PWM modulator.
The PWM modulator working method comprises the following steps:
receiving a control signal: the PWM modulator receives a control signal from the control unit, which is calculated from the reference power value and the feedback signal.
Determining pulse width: based on the received control signal, the PWM modulator calculates a corresponding pulse width. This typically involves adjusting the duty cycle of the pulse width in accordance with a control signal to achieve a desired output power adjustment.
Outputting a modulation signal: the PWM modulator converts the calculated pulse width information into a pulse width modulation signal and outputs the pulse width modulation signal to the power converter or the inverter. This modulated signal will control the output power of the parallel diesel-electric generator set.
The control unit sets a reference power value according to the load requirement and the system requirement through the linkage work of the control unit and the PWM modulator, and generates a control signal through calculation. And the PWM modulator converts the received control signal into a pulse width modulation signal to realize accurate control of the output power of the generator set. The linkage working method can ensure that the parallel diesel generator set stably outputs required power according to actual requirements.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.
The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are to be protected by the present application.
Claims (5)
1. The utility model provides a diesel generating set parallel control system based on PWM control, includes main control center, input sensor, control unit, PWM modulator and output sensor, its characterized in that:
an input sensor: the system is used for monitoring the input current and the output power of the parallel diesel generator set;
and a control unit: the method comprises the steps of being responsible for receiving data input to a sensor and generating PWM signals according to a preset control strategy;
a PWM modulator: receiving a PWM signal from a control unit and correspondingly controlling the power output of the parallel diesel generator set;
an output sensor: the method is used for monitoring the output current and power of the parallel diesel generator set in real time.
2. The PWM control-based diesel-electric set parallel control system according to claim 1, wherein: the input sensor includes:
a current sensor: for monitoring and measuring the input current of each generator set, each generator set being equipped with an independent current sensor;
a power sensor: the power sensor is used for monitoring and measuring the output power of the parallel diesel generator sets, and each parallel diesel generator set is provided with an independent power sensor;
temperature sensor: for monitoring and measuring the temperature variation of the parallel diesel-electric generator set, the temperature sensor is arranged on a key component of the generator set;
a pressure sensor: for monitoring and measuring changes in oil pressure and air pressure of a diesel generator set, pressure sensors are installed in a diesel fuel supply system and a lubricating oil system.
3. The PWM control-based diesel-electric set parallel control system according to claim 1, wherein: the control unit also comprises the following sub-modules:
and the data acquisition and processing module is used for: the control unit is responsible for receiving and processing the data provided by the input sensor unit;
the control strategy generation module: based on a preset control strategy and the current system state, the control unit generates a PWM signal to control the power output of the parallel diesel generator set;
a PWM signal generation module: the control unit generates a PWM signal by using a PWM modulation technology;
and the fault monitoring and protecting module is used for: the control unit is responsible for monitoring the running state of the parallel diesel generator set in real time;
remote monitoring and operation module: the control unit can communicate with an external monitoring system to realize remote monitoring and operation of the system.
4. The PWM control-based diesel-electric set parallel control system according to claim 1, wherein: the PWM modulator comprises the following sub-modules:
pulse width modulation module: the PWM modulator adopts a pulse width modulation technology, and realizes accurate control of output power by controlling the pulse width of a signal;
and an accurate control module: the PWM modulator has high-precision control capability and generates accurate PWM signals according to data and instructions provided by the control unit;
high-speed switching device: the PWM modulator uses a high-speed switching device to realize the cutting-off and the starting of a power supply;
overcurrent protection module: the PWM modulator also has an overcurrent protection function;
an adjustable frequency module: the PWM modulator also has the characteristic of adjustable frequency;
and a protection module: the PWM modulator should also have a fault protection function to ensure safe operation of the system;
an input module: receiving a reference power value and a feedback signal;
a comparator: for comparing the reference power value with the feedback signal to generate an error signal;
and a control algorithm module: calculating pulse width according to the error signal, wherein a control algorithm is based on PID control, and the control algorithm is based on fuzzy logic control;
and an output module: the calculated pulse width is converted into a pulse width modulation signal, the output module adopts a timer and a counter to generate a periodical pulse signal, and the output module controls the pulse width by adjusting the duty ratio of the pulse.
5. The PWM control-based diesel-electric set parallel control system according to claim 1, wherein: the output sensor further comprises the following sub-modules:
and (3) detecting output parameters: the output sensor unit is used for detecting the operation data through a sensor arranged on an output line of the generator set;
accurate measurement: the output sensor unit has high-accuracy measurement capability and can accurately measure output parameters;
reliability and durability: the output sensor unit needs to have durability and reliability to cope with a severe working environment and long-time operation;
data transmission and communication: the output sensor unit can transmit the measurement data to the control unit in a wired or wireless communication mode;
fault detection and protection: the output sensor unit has fault detection and protection functions;
calibration and auto-correction: to ensure accuracy of the measurement results, the output sensor unit should be provided with calibration and automatic correction functions.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117792168A (en) * | 2024-02-28 | 2024-03-29 | 山西汇达电信设备有限公司 | Generator configuration method and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117792168A (en) * | 2024-02-28 | 2024-03-29 | 山西汇达电信设备有限公司 | Generator configuration method and system |
| CN117792168B (en) * | 2024-02-28 | 2024-05-07 | 山西汇达电信设备有限公司 | Generator configuration method and system |
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