CN114001965A - Electric power measuring system of diesel engine - Google Patents
Electric power measuring system of diesel engine Download PDFInfo
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- CN114001965A CN114001965A CN202111256107.9A CN202111256107A CN114001965A CN 114001965 A CN114001965 A CN 114001965A CN 202111256107 A CN202111256107 A CN 202111256107A CN 114001965 A CN114001965 A CN 114001965A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
- G01M15/042—Testing internal-combustion engines by monitoring a single specific parameter not covered by groups G01M15/06 - G01M15/12
- G01M15/044—Testing internal-combustion engines by monitoring a single specific parameter not covered by groups G01M15/06 - G01M15/12 by monitoring power, e.g. by operating the engine with one of the ignitions interrupted; by using acceleration tests
Abstract
The invention discloses an electric power measuring system of a diesel engine, which comprises: the test motor is used as a motor to drive the engine to be tested to reach the starting speed of the engine to be tested, performs power measurement on the engine to be tested after the engine to be tested is started, and is used as a generator to generate electric energy; the distribution board is connected with the test motor and used for receiving the electric energy generated by the test motor; the power grid is connected with the distribution board and used for receiving the electric energy provided by the distribution board; the energy storage unit is used for storing electric energy provided by the distribution board; and the energy management monitoring unit is connected with the distribution board and is used for distributing the electric energy supplied to the power grid and the energy storage unit by the distribution board. The accuracy of measuring the power of the diesel engine is improved, and the mechanical energy output by the diesel engine is converted into useful energy; energy is reasonably distributed according to use requirements through the energy management monitoring unit, manual intervention is reduced, stability of the system is ensured, and economic benefits are brought into play to the greatest extent.
Description
Technical Field
The embodiment of the invention relates to the technical field of power electronics, in particular to an electric power measuring system of a diesel engine.
Background
The diesel engine is an engine which burns diesel to obtain energy and release, has the advantages of large torque, good economic performance and the like, and is mainly used for final matched products, such as a high-power high-speed diesel engine which is mainly matched with heavy-duty automobiles, large-scale buses, engineering machinery, ships, generator sets and the like.
In order to verify the performance of the diesel engine, an on-load test is required before the engine leaves a factory, and a hydraulic dynamometer is used for testing the performance index of the engine at present, particularly for a low-speed diesel engine. The hydraulic dynamometer applies work through the resistance of water and a rotating shaft, mechanical energy output by a diesel engine is converted into heat energy, but the heat energy converted by the hydraulic dynamometer is difficult to be converted into useful energy to be utilized, so that the energy is wasted; and the loading precision and the response speed of the water conservancy dynamometer are poor, so that the accuracy of the power test of the diesel engine is reduced.
Disclosure of Invention
The embodiment of the invention provides an electric power dynamometer system of a diesel engine, which is used for converting mechanical energy output by the diesel engine into useful energy to be utilized, realizing reasonable energy distribution according to use requirements and improving the dynamometer accuracy of the diesel engine.
The embodiment of the invention provides an electric power dynamometer system of a diesel engine, which comprises:
the test motor is connected with the engine to be tested through a coupler and used as a motor to drive the engine to be tested to reach the starting speed of the engine to be tested; after the engine to be tested is started, the engine to be tested is tested and is used as a generator to generate electric energy;
the distribution board is connected with the test motor and is used for receiving electric energy generated by the test motor;
the power grid is connected with the distribution board and is used for receiving the electric energy provided by the distribution board;
the energy storage unit is used for storing electric energy provided by the distribution board;
the energy management monitoring unit is connected with the distribution board and used for distributing electric energy supplied by the distribution board to the power grid and the energy storage unit.
Optionally, the energy management monitoring unit is further connected to the power grid, and the energy management monitoring unit is further configured to monitor voltage, frequency, and phase difference of the power grid;
the energy management monitoring system is characterized by further comprising a variable-frequency voltage regulating unit, the variable-frequency voltage regulating unit is connected with the test motor and the energy management monitoring unit, and the variable-frequency voltage regulating unit is used for regulating electricity generated by the test motor according to voltage, frequency and phase difference of a power grid.
Optionally, the electric dynamometer system of the diesel engine further includes:
the angular speed encoder is arranged on a non-shaft-extension end of the test motor and is used for measuring the rotating speed of a power mechanical shaft of the engine to be tested;
the torque analyzer is used for measuring the torque of a power mechanical shaft of the engine to be measured; and the test motor is used for determining the power of the engine to be tested according to the rotating speed and the torque.
Optionally, the electric dynamometer system of the diesel engine further includes:
the power grid switch cabinet is connected between the power grid and the distribution board and is used for controlling the conduction state of the power grid and the distribution board;
the power grid switch cabinet is further connected with the energy management monitoring unit, and the energy management monitoring unit is further used for controlling the on-off state of the power grid switch cabinet according to the power utilization state of the power grid.
Optionally, the electric dynamometer system of the diesel engine further includes:
and the filtering unit is connected between the variable-frequency voltage regulating unit and the distribution board and is used for filtering the electricity output by the variable-frequency voltage regulating unit.
Optionally, the energy storage unit includes:
the charging and inverting integrated machine is respectively connected with the energy management monitoring unit, the distribution board and the battery pack, and the charging and inverting integrated machine is used for controlling the charging and discharging state of the battery pack according to the control signal sent by the energy management monitoring unit.
Optionally, the battery pack is provided with a battery management system, the battery management system is connected to the energy management monitoring unit, and the battery management system is configured to collect charge and discharge state parameters of the battery pack and send the charge and discharge state parameters of the battery pack to the energy management monitoring unit.
Optionally, the energy storage unit is further configured to store electric energy of the power grid, or supply power to the power grid.
Optionally, the electric dynamometer system of the diesel engine further includes:
and the load box is connected with the distribution board and used for consuming the electric energy left by the distribution board after supplying power to the power grid and the energy storage unit.
Optionally, the test motor includes a separately excited synchronous motor.
The embodiment of the invention provides an electric power dynamometer system of a diesel engine, which comprises: the test motor is connected with the engine to be tested through a coupler and used as a motor to drive the engine to be tested to reach the starting speed of the engine to be tested; after the engine to be tested is started, the engine to be tested is tested and is used as a generator to generate electric energy; the distribution board is connected with the test motor and used for receiving electric energy generated by the test motor; the power grid is connected with the distribution board and is used for receiving the electric energy provided by the distribution board; the energy storage unit is used for storing electric energy provided by the distribution board; and the energy management monitoring unit is connected with the distribution board and is used for distributing the electric energy supplied by the distribution board to the power grid and the energy storage unit. According to the technical scheme provided by the embodiment of the invention, the electric dynamometer is applied to the on-load test of the diesel engine, the loading precision and the response speed are greatly improved, and the accuracy of diesel engine dynamometer is improved; mechanical energy is converted into electric energy by acting on a diesel engine shaft, and the electric energy can be fed back to a power grid for other electric loads, so that the mechanical energy output by the diesel engine is converted into useful energy to be utilized, and the energy waste is avoided; in addition, energy can be reasonably distributed according to use requirements through the energy management monitoring unit, manual intervention is reduced, stability of the system is ensured, and economic benefits are brought into play to the greatest extent.
Drawings
FIG. 1 is a block diagram of an electric dynamometer system for a diesel engine according to an embodiment of the present invention;
FIG. 2 is a block diagram of an electric dynamometer system for another diesel engine according to an embodiment of the present invention;
fig. 3 is a block diagram of an electric dynamometer system of another diesel engine according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
An embodiment of the present invention provides an electric power measuring system of a diesel engine, fig. 1 is a block diagram of a structure of the electric power measuring system of the diesel engine provided in the embodiment of the present invention, and referring to fig. 1, the electric power measuring system of the diesel engine includes:
the testing motor 20 is connected with the engine 10 to be tested through a coupler, and the testing motor 20 is used as a motor to drive the engine 10 to be tested to reach the starting speed of the engine 10 to be tested; and measures the power of the engine 10 to be tested after the test motor 20 is started, and generates electric energy as a generator;
a distribution board 30, wherein the distribution board 30 is connected with the test motor 20, and the distribution board 30 is used for receiving the electric energy generated by the test motor 20;
the power grid 40, the power grid 40 is connected with the distribution board 30, the power grid 40 is used for receiving the electric energy provided by the distribution board 30;
the energy storage unit 50, the energy storage unit 50 is used for storing the electric energy provided by the distribution board 30;
and the energy management monitoring unit 60, the energy management monitoring unit 60 is connected with the distribution board 30, and the energy management monitoring unit 60 is used for distributing the electric energy supplied by the distribution board 30 to the power grid and the energy storage unit 50.
Specifically, the test motor 20 is connected to the engine 10 to be tested through a coupling, which is also called a coupling, and is a mechanical component for firmly coupling a driving shaft and a driven shaft of different mechanisms to rotate together and transmitting motion and torque. The motor is a device for converting electric energy into mechanical energy, and the test motor 20 is used as a motor for converting electric energy into mechanical energy to drive the engine 10 to be tested through the coupler, so that the engine 10 to be tested reaches the ignition speed of the engine 10 to be tested, and the engine 10 to be tested is started. The generator is a mechanical device which converts energy of other forms into electric energy, the engine 10 to be tested is started and then drives the test motor 20 through the coupler, at the moment, the test motor 20 serves as a generator to generate electric energy, and the test motor 20 can be a separately excited synchronous motor. For example, the test motor 20 is a 7MW/10kV medium voltage separately excited synchronous motor, a 10MW diesel engine works for 8 hours per day, runs for 200 days per year, and generates 1120 ten thousand degrees of electricity per year when the generated power is calculated according to 7000 kW. The test motor 20 can emit active power and also can emit reactive power, and air cooling and water cooling can be adopted for cooling at the same time so as to ensure that the test motor 20 runs at full load for a long time. And determining the power of the engine 10 to be tested by acquiring the rotating speed and the torque of the engine 10 to be tested after starting. The engine 10 to be tested is a low-speed diesel engine, the test motor 20 is used as an electric dynamometer to be applied to a load test of the diesel engine in the embodiment of the invention, the loading precision and the response speed are greatly improved, and the accuracy of diesel engine dynamometer is improved.
The distribution board 30 is connected to the test motor 20, and the test motor 20 generates electric power as a generator and then transmits the generated electric power to the distribution board 30. The distribution board 30 may be a distribution board in which electrical components such as sockets, switches, relays, etc. are disposed on a bakelite board, and the distribution board 30 is used to receive the electric power generated by the test motor 20 and distribute the electric power generated by the generator to the electricity consumption units. The electricity utilization unit comprises an electricity grid 40, the electricity grid 40 is connected with the distribution board 30, the electricity grid 40 is used for receiving the electric energy provided by the distribution board 30, and the electricity grid 40 is used for delivering the electric energy to various electricity utilization places. The mechanical energy is converted into the electric energy by the working of the diesel engine shaft, and the electric energy can be fed back to the power grid 40 for other electric loads, so that the mechanical energy output by the diesel engine is converted into useful energy to be utilized, and the energy waste is avoided. The energy storage unit 50 is connected to the distribution board 30, and the energy storage unit 50 is used for storing electric energy provided by the distribution board 30. The electrical energy generated by the generator can be sent to the power grid 40 for consumption, and can also be stored in an energy storage unit 50, such as a lithium battery. The electric energy stored in the energy storage unit 50 can also be used by other electric loads, so that the mechanical energy output by the diesel engine is converted into useful energy to be utilized, and further the waste of the energy is avoided.
The energy management monitoring unit 60 is connected to the distribution board 30, and the energy management monitoring unit 60 is used for distributing the electric energy supplied by the distribution board 30 to the grid and the energy storage unit 50. The generated electric energy can be preferentially sent to the national power grid for consumption, and the redundant electric energy can be stored in the energy storage unit 50 such as a lithium battery. By using the intelligent energy management monitoring unit 60, the electricity generated by the electric dynamometer can be reasonably distributed according to the use requirement, the human intervention is reduced, the stability of the system is ensured, and the economic benefit is exerted to the maximum extent.
According to the technical scheme provided by the embodiment of the invention, the electric dynamometer is applied to the on-load test of the diesel engine, so that the loading precision and the response speed are greatly improved, and the accuracy of diesel engine dynamometer is improved; mechanical energy is converted into electric energy by acting on a diesel engine shaft, and the electric energy can be fed back to a power grid for other electric loads, so that the mechanical energy output by the diesel engine is converted into useful energy to be utilized, and the energy waste is avoided; in addition, energy can be reasonably distributed according to use requirements through the energy management monitoring unit, manual intervention is reduced, stability of the system is ensured, and economic benefits are brought into play to the greatest extent.
Optionally, the electric dynamometer system of the diesel engine further includes:
the angular speed encoder is arranged at the non-shaft-extension end of the test motor 20 and is used for measuring the rotating speed of the power mechanical shaft of the engine 10 to be tested;
a torque analyzer for measuring a torque of a power machine shaft of the engine 10 to be measured; the test motor is used for determining the power of the engine 10 to be tested according to the rotating speed and the torque.
Specifically, the power mechanical shaft of the engine 10 to be tested is connected with the test motor 20 through a coupling. The non-shaft-extension end of the test motor 20 is provided with a high-precision angular speed encoder, and the angular speed encoder is used for measuring the rotating speed of the power mechanical shaft of the engine 10 to be tested. The power machine shaft is provided with a torque analyzer for measuring the torque of the power machine shaft of the engine 10 to be measured. Therefore, the torque output by the power mechanical shaft of the engine 10 to be tested is measured by the dynamometer motor, and the power of the engine 10 to be tested is determined by combining the rotating speed.
Alternatively, fig. 2 is a block diagram of another electric dynamometer system for a diesel engine according to an embodiment of the present invention, and referring to fig. 2, the energy management monitoring unit 60 is further connected to the power grid 40, and the energy management monitoring unit 60 is further configured to monitor the voltage, the frequency, and the phase difference of the power grid 40;
the energy management and monitoring system further comprises a variable frequency and voltage regulation unit 70, wherein the variable frequency and voltage regulation unit 70 is connected with the test motor 20 and the energy management and monitoring unit 60, and the variable frequency and voltage regulation unit 70 is used for regulating electricity generated by the test motor 20 according to the voltage, the frequency and the phase difference of the power grid 40.
Specifically, the energy management monitoring unit 60 has a grid-connected function, and monitors the voltage, frequency and phase difference of the power grid 40 through the electric quantity parameter acquisition module, and sends the voltage, frequency and phase difference to the variable frequency voltage regulating unit 70 through the controller, and the variable frequency voltage regulating unit 70 is used for regulating and testing the electricity generated by the motor 20 according to the voltage, frequency and phase difference of the power grid, so as to ensure that the electric energy output by the electric power dynamometer system can be matched with the power grid 40, and meet grid-connected conditions. The frequency conversion and voltage regulation unit 70 may include a frequency converter, which is an electric control device that applies frequency conversion technology and microelectronic technology to control the motor by changing the frequency of the working power supply of the motor. A filtering unit 80 may be further included, the filtering unit 80 is connected between the variable frequency voltage regulating unit 70 and the distribution board 30, and the filtering unit 80 is used for filtering the electricity output by the variable frequency voltage regulating unit 70.
A frequency converter with a built-in Active Front End (AFE) technology is also called a feedback type frequency converter, and the AFE frequency converter adopts an Active prevention mode, i.e., harmonic distortion is detected inside the frequency converter, so that the harmonic distortion is prevented from entering a wider power grid and causing larger influence. By continuously canceling harmonics generated by nonlinear currents generated inside the frequency converter, active filtering can control the harmonics within a specified range and is not affected by input voltage fluctuations. For example, the frequency converter adopts 7MW/10kV, an AFE active front end can enable a motor to operate in 4 quadrants, power generation is fed back to a power grid, and an LCL filter is arranged, so that the total distortion rate THDU of voltage harmonics is less than 5%, and the interference to the power grid is reduced.
Optionally, with continuing reference to fig. 2, the electric dynamometer system for the diesel engine further includes:
the power grid switch cabinet 90 is connected between a power grid and the distribution board 30, and the power grid switch cabinet 90 is used for controlling the conduction state of the power grid 40 and the distribution board 30;
the grid switch cabinet 90 is further connected to the energy management monitoring unit 60, and the energy management monitoring unit 60 is further configured to control an open/close state of the grid switch cabinet 90 according to the power consumption state of the power grid 40.
Specifically, the grid switch cabinet 90 is connected between the grid 40 and the distribution board 30, and the opening and closing of the grid switch cabinet 90 can control the conduction state between the grid and the distribution board 30. The grid switch cabinet 90 is further connected to the energy management monitoring unit 60, and the energy management monitoring unit 60 can control the on/off state of the grid switch cabinet 90 according to the power consumption state of the grid 40. After the electric energy output by the electric power dynamometer system matches with the power grid 40 to meet grid-connection conditions, if the energy management monitoring unit 60 judges that the power utilization state of the power grid 40 is the required power supply according to preset judgment conditions, the energy management monitoring unit 60 controls the power grid switch cabinet 90 to be closed. After the grid switch cabinet 90 is closed, the electric energy output by the electric power measuring system can be transmitted to the grid through the distribution board 30, so that grid connection is completed, and power is supplied to the grid 40.
Alternatively, fig. 3 is a block diagram of an electric dynamometer system of another diesel engine according to an embodiment of the present invention, and referring to fig. 3, the energy storage unit 50 includes:
the charging and inverting integrated machine 51 is respectively connected with the energy management monitoring unit 60, the distribution board 30 and the battery pack 52, and the charging and inverting integrated machine 51 is used for controlling the charging and discharging state of the battery pack 52 according to the control signal sent by the energy management monitoring unit 60.
Specifically, the battery pack 52 includes a plurality of lithium batteries, and the battery pack 52 is connected to the distribution board 30 of the system through the charging and inverting all-in-one machine 51, so as to implement the charging and discharging functions of the lithium batteries. The charging and inverting integrated machine 51 can convert the ac power of the distribution board 30 into dc power to charge the lithium battery, and can also invert the dc power of the lithium battery into ac power to discharge and transmit the ac power to the distribution board 30.
Optionally, with continuing reference to fig. 3, the battery pack 52 is provided with a battery management system 53, the battery management system 53 is connected to the energy management monitoring unit 60, and the battery management system 53 is configured to collect the charge and discharge state parameters of the battery pack 52 and send the charge and discharge state parameters of the battery pack 52 to the energy management monitoring unit 60.
Specifically, the Battery pack 52 may be in the form of a container, and is equipped with a Battery Management System 53(BMS, Battery Management System), the Battery Management System 53 is connected to the energy Management monitoring unit 60, and the Battery Management System 53 is configured to collect the charge and discharge state parameters of the Battery pack 52 and send the charge and discharge state parameters of the Battery pack 52 to the energy Management monitoring unit 60. The utilization rate of the lithium battery can be improved, the phenomena of overcharge and over-discharge of the lithium battery are prevented, the service life of the battery is prolonged, and the battery state is monitored. The battery pack 52 may also be equipped with lighting, ventilation, fire protection, etc. systems to further protect the battery pack 52 so that the battery pack 52 may operate safely.
Optionally, with continued reference to fig. 3, the energy storage unit 50 is further used for storing electric energy of the power grid or supplying power to the power grid.
Specifically, the energy storage unit 50 and the power grid are both connected to the distribution board 30, and the energy storage unit 50 may also store electric energy of the power grid or supply power to the power grid. For example, the energy management monitoring unit 60 is configured to control the energy storage unit 50 to store the electric energy of the power grid 40 when the power grid 40 runs at a valley, and the energy management monitoring unit 60 is further configured to control the energy storage unit 50 to discharge the power grid when the power grid 40 runs at a peak.
Optionally, with continuing reference to fig. 3, the electric dynamometer system for the diesel engine further includes:
and the load box 100, the load box 100 is connected with the distribution board 30, and the load box 100 is used for consuming the electric energy left after the distribution board 30 supplies power to the power grid and the energy storage unit 50.
According to the technical scheme provided by the embodiment of the invention, the energy management monitoring unit 60 is configured, so that the working parameters of each device of the electric power dynamometer system can be monitored, and the device is remotely controlled to start and stop and the breaker is switched on and off; the power grid switching system has a grid connection function, the voltage, the frequency and the phase difference of the power grid 40 are monitored through the electric quantity parameter acquisition module and are sent to the variable frequency voltage regulation unit 70 through the controller, the quality of the output electric energy of the electric power dynamometer system is guaranteed to be matched with the power grid, grid connection conditions are met, and the power grid switch cabinet 90 is controlled to be switched on to realize grid connection; the energy distribution function is provided, the generated electric energy is preferentially sent to the power grid 40 for consumption, the electric energy can be stored in energy storage equipment such as a lithium battery, redundant electric energy is generated, and the electric energy can be consumed through the load box 100. And the energy storage unit 50 can be controlled to be charged through the power grid 40 during the power utilization valley, and the energy storage unit 50 is controlled to be discharged to the power grid 40 during the power utilization peak. And the alarm unit can be controlled to give an alarm when the electric power dynamometer system fails. The system realizes reasonable distribution according to use requirements, reduces human intervention, ensures the stability of the system, and exerts economic benefits to the maximum extent.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. An electric dynamometer system of a diesel engine, characterized by comprising:
the test motor is connected with the engine to be tested through a coupler and used as a motor to drive the engine to be tested to reach the starting speed of the engine to be tested; after the engine to be tested is started, the engine to be tested is tested and is used as a generator to generate electric energy;
the distribution board is connected with the test motor and is used for receiving electric energy generated by the test motor;
the power grid is connected with the distribution board and is used for receiving the electric energy provided by the distribution board;
the energy storage unit is used for storing electric energy provided by the distribution board;
the energy management monitoring unit is connected with the distribution board and used for distributing electric energy supplied by the distribution board to the power grid and the energy storage unit.
2. The electric dynamometer system of a diesel engine according to claim 1,
the energy management monitoring unit is also connected with the power grid and is used for monitoring the voltage, the frequency and the phase difference of the power grid;
the energy management monitoring system is characterized by further comprising a variable-frequency voltage regulating unit, the variable-frequency voltage regulating unit is connected with the test motor and the energy management monitoring unit, and the variable-frequency voltage regulating unit is used for regulating electricity generated by the test motor according to voltage, frequency and phase difference of a power grid.
3. The electric dynamometer system of a diesel engine according to claim 1, further comprising:
the angular speed encoder is arranged on a non-shaft-extension end of the test motor and is used for measuring the rotating speed of a power mechanical shaft of the engine to be tested;
the torque analyzer is used for measuring the torque of a power mechanical shaft of the engine to be measured; and the test motor is used for determining the power of the engine to be tested according to the rotating speed and the torque.
4. The electric dynamometer system of a diesel engine according to claim 2, further comprising:
the power grid switch cabinet is connected between the power grid and the distribution board and is used for controlling the conduction state of the power grid and the distribution board;
the power grid switch cabinet is further connected with the energy management monitoring unit, and the energy management monitoring unit is further used for controlling the on-off state of the power grid switch cabinet according to the power utilization state of the power grid.
5. The electric dynamometer system of a diesel engine according to claim 2, further comprising:
and the filtering unit is connected between the variable-frequency voltage regulating unit and the distribution board and is used for filtering the electricity output by the variable-frequency voltage regulating unit.
6. The diesel engine electric dynamometer system of claim 1, wherein the energy storage unit includes:
the charging and inverting integrated machine is respectively connected with the energy management monitoring unit, the distribution board and the battery pack, and the charging and inverting integrated machine is used for controlling the charging and discharging state of the battery pack according to the control signal sent by the energy management monitoring unit.
7. The electric dynamometer system of a diesel engine according to claim 6,
the battery pack is provided with a battery management system, the battery management system is connected with the energy management monitoring unit, and the battery management system is used for acquiring the charge and discharge state parameters of the battery pack and sending the charge and discharge state parameters of the battery pack to the energy management monitoring unit.
8. The diesel engine electric dynamometer system of claim 1, wherein the energy storage unit is further configured to store electric energy from the power grid or to supply power to the power grid.
9. The electric dynamometer system of a diesel engine according to claim 1, further comprising:
and the load box is connected with the distribution board and used for consuming the electric energy left by the distribution board after supplying power to the power grid and the energy storage unit.
10. The diesel engine electrical dynamometer system of claim 1, wherein the test electric machine includes a separately excited synchronous machine.
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| CN202111256107.9A CN114001965A (en) | 2021-10-27 | 2021-10-27 | Electric power measuring system of diesel engine |
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