Diesel generating set parallel operation control system

Abstract

The utility model relates to the technical field of parallel operation control, in particular to a parallel operation control system for diesel generating sets, which comprises a plurality of diesel generating sets, the plurality of diesel generating sets are arranged in parallel, and the input end of each diesel generating set is electrically connected with a control module. The utility model has the advantages that: a plurality of units are connected in parallel for use, active load and reactive load are distributed, maintenance and repair are convenient and timely, each parallel branch is provided with a current monitoring module which can monitor the phase of the output alternating current, and when the phase of the alternating current changes, the output alternating current can be monitored by the current monitoring module. According to the utility model, signals can be timely transmitted to the control module, signals from the control system can be received, the rotating speed of the generator can be adjusted according to the signals, the phase of alternating current can be timely adjusted, the generator can be ensured to stably operate under various load conditions, and the efficiency and stability of the whole power system can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of parallel machine control, in particular to a parallel machine control system for a diesel generator set. Background Art

[0002] A diesel generator is a small power generation equipment, which refers to a power machine that uses diesel as fuel and a diesel engine as the prime mover to drive the generator to generate electricity. The whole set is generally composed of a diesel engine, a generator, a control box, a fuel tank, a storage battery for starting and control, a protection device, an emergency cabinet and other components. Diesel generators are widely used in daily power generation and emergency power generation in various households, offices, large, medium and small enterprises. At present, in order to improve the reliability and continuity of the power supply system, multiple units are often connected in parallel to form a power grid. The voltage and frequency of the power supply are stable and can withstand the impact of large load changes. The parallel control system is a system that controls the diesel generator sets after they are connected in parallel.

[0003] After the diesel generator set is connected in parallel, multiple generators need to be connected in parallel. Since the output current of the diesel generator is AC, although the electrical parameters such as the output voltage and frequency of the diesel generator should be the same between the same type of equipment, the current phase will be affected by many factors, including the speed of the diesel engine, the control strategy, the load condition, etc. Even if two diesel generators of the same model are running in parallel, their output current phases may have certain differences. Inconsistent phase sequence will also lead to unstable current, thus causing instability in the power system. This will cause the equipment in the power system to be overloaded and frequently fail, so a diesel generator set parallel control system is needed to solve the above problems. Utility Model Content

[0004] The purpose of the present invention is to solve at least one of the above technical deficiencies.

[0005] Therefore, one purpose of the present invention is to provide a diesel generator set parallel control system to solve the problems mentioned in the background technology and overcome the deficiencies in the prior art.

[0006] In order to achieve the above-mentioned purpose, an embodiment of one aspect of the utility model provides a diesel generator set parallel control system, including a diesel generator set, wherein the number of the diesel generator sets is several, and the several diesel generator sets are arranged in parallel, and the input end of each of the diesel generator sets is electrically connected to a control module, and the several control modules are arranged in parallel through wires, and the output end of the diesel generator set is electrically connected to a current monitoring module, and the output end of the current monitoring module is electrically connected to the control module, and the output end of the control module is electrically connected to a speed regulation module, and the speed regulation module is electrically connected to the diesel generator set.

[0007] Preferably, the output end of the plurality of diesel generator sets connected in parallel is electrically connected to a load, and a first switch is provided between the load and the diesel generator set. The output end of the diesel generator set is electrically connected to a second switch, and the second switch is electrically connected to a control module. The current monitoring module is located between the second switch and the diesel generator set. The current monitoring module is a current sensor. The technical effect achieved by the above technical solution is: by setting multiple diesel generator sets in parallel and setting a control module in each parallel circuit, each diesel generator set can not only be set independently, but also can be connected in parallel to supply power to the load, thereby improving the reliability and continuity of the power supply system. Multiple units are connected in parallel to form a power grid, and the voltage and frequency of the power supply are stable, which can withstand the impact of large load changes, thereby improving the reliability and continuity of the power supply system. Multiple units are used in parallel, which can be centrally dispatched and the active load and reactive load can be allocated, which can make maintenance and repair convenient and timely. In addition, a current monitoring module is provided in each parallel branch, which can monitor the output AC current phase. When the AC current phase changes, the signal can be transmitted to the control module in time, the signal from the control system can be received, and the speed of the generator can be adjusted according to these signals. The AC current phase can be adjusted in time, which can ensure the stable operation of the generator under various load conditions and improve the efficiency and stability of the entire power system.

[0008] Preferably, the wires connected in parallel between the control modules are MSC two-core shielded control wires. The output end of the diesel generator set is electrically connected to a temperature monitoring module, the diesel generator set and the speed control module are electrically connected to an execution module, the execution module is electrically connected to the temperature monitoring module, the temperature monitoring module is a temperature sensor, and the execution module is a solenoid valve. The technical effect achieved by adopting the above technical scheme is: the wires connected in parallel between the control modules are MSC two-core shielded control wires, the two-core shielded control wires have excellent shielding performance, can effectively suppress interference signals, and ensure clear transmission, and each diesel generator set is equipped with a temperature sensor at the key monitoring position on the surface to monitor the temperature of the generator. When the monitored temperature exceeds a predetermined value, an instruction will be sent to the control module, and the execution module will start or stop the generator according to the instruction of the control module, which can prevent the diesel generator set from malfunctioning due to excessive temperature.

[0009] Compared with the prior art, the advantages and beneficial effects of the utility model are:

[0010] 1. By setting up multiple diesel generator sets in parallel and setting a control module in each parallel circuit, each diesel generator set can not only be set up independently, but also can be connected in parallel to supply power to the load, thereby improving the reliability and continuity of the power supply system. Multiple units are connected in parallel to form a power grid, and the voltage and frequency of the power supply are stable, which can withstand the impact of large load changes, thereby improving the reliability and continuity of the power supply system. Multiple units are used in parallel, which can be centrally dispatched and the active and reactive loads can be allocated, which can make maintenance and repair convenient and timely. In addition, a current monitoring module is provided in each parallel branch to monitor the output AC current phase. When the AC current phase changes, the signal can be transmitted to the control module in time, the signal from the control system can be received, and the generator speed can be adjusted according to these signals. The AC current phase can be adjusted in time, which can ensure the stable operation of the generator under various load conditions and improve the efficiency and stability of the entire power system.

[0011] 2. The wires connected in parallel between the control modules are MSC two-core shielded control wires. The two-core shielded control wires have excellent shielding performance, which can effectively suppress interference signals and ensure clear transmission. In addition, temperature sensors are installed on the key monitoring parts of the surface of each diesel generator set to monitor the temperature of the generator. When the monitored temperature exceeds the preset value, an instruction will be sent to the control module. The execution module starts or stops the generator according to the instructions of the control module, which can prevent the diesel generator set from malfunctioning due to excessive temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is the work flow chart of the utility model.

[0013] In the figure: 1-diesel generator set, 2-control module, 3-current monitoring module, 4-speed regulation module, 5-load, 6-first switch, 7-second switch, 8-temperature monitoring module, 9-execution module. DETAILED DESCRIPTION

[0014] The utility model is further described below in conjunction with the accompanying drawings, but the protection scope of the utility model is not limited to the following.

[0015] A diesel generator set parallel control system comprises a diesel generator set 1. The number of the diesel generator sets 1 is several, and the several diesel generator sets 1 are arranged in parallel. The input end of each diesel generator set 1 is electrically connected to a control module 2, and the several control modules 2 are arranged in parallel through wires. The output end of the diesel generator set 1 is electrically connected to a current monitoring module 3, and the output end of the current monitoring module 3 is electrically connected to the control module 2. The output end of the control module 2 is electrically connected to a speed regulating module 4, and the speed regulating module 4 is electrically connected to the diesel generator set 1.

[0016] As an optional technical solution of the utility model, the output end of several diesel generator sets 1 connected in parallel is electrically connected to a load 5, and a first switch 6 is provided between the load 5 and the diesel generator set 1. The output end of the diesel generator set 1 is electrically connected to a second switch 7, and the second switch 7 is electrically connected to the control module 2. The current monitoring module 3 is located between the second switch 7 and the diesel generator set 1. The current monitoring module 3 is a current sensor. By setting a plurality of diesel generator sets in parallel and setting a control module in each parallel circuit, each diesel generator set can not only be set independently, but also can be connected in parallel to supply power to the load, thereby improving the reliability and continuity of the power supply system. Multiple units are connected in parallel to form a power grid, and the voltage and frequency of the power supply are stable, which can withstand the impact of large load changes.

[0017] As an optional technical solution of the utility model, the wires connected in parallel between several control modules 2 are MSC two-core shielded control wires. The output end of the diesel generator set 1 is electrically connected with a temperature monitoring module 8, and an execution module 9 is electrically connected between the diesel generator set 1 and the speed control module 4. The execution module 9 is electrically connected with the temperature monitoring module 8. The temperature monitoring module 8 is a temperature sensor, and the execution module 9 is a solenoid valve. The wires connected in parallel between the control modules are MSC two-core shielded control wires. The two-core shielded control wires have excellent shielding performance, can effectively suppress interference signals, and ensure clear transmission. In addition, each diesel generator set is equipped with a temperature sensor at the key monitoring position on the surface to monitor the temperature of the generator.

[0018] A diesel generator set parallel control system, when it is working: by setting multiple diesel generator sets 1 in parallel, and setting a control module 2 in each parallel circuit, each diesel generator set 1 can not only be set up independently, but also can be connected in parallel to supply power to a load 5, thereby improving the reliability and continuity of the power supply system. Multiple units are connected in parallel to form a power grid, and the voltage and frequency of the power supply are stable, which can withstand the impact of large load changes, thereby improving the reliability and continuity of the power supply system. Multiple units are used in parallel, and active loads and reactive loads can be centrally dispatched and allocated, which can make maintenance and repair convenient and timely. In addition, a current monitoring module 3 is provided in each parallel branch, which can monitor the output AC current phase. When the AC current phase changes, the signal can be transmitted to the control module in time. Module 2 can receive signals from the control system and adjust the speed of the generator according to these signals. It can adjust the phase of the AC current in time, ensure the stable operation of the generator under various load conditions, and improve the efficiency and stability of the entire power system. The wires connected in parallel between the control modules 2 are MSC two-core shielded control wires. The two-core shielded control wires have excellent shielding performance, can effectively suppress interference signals, and ensure clear transmission. In addition, each diesel generator set 1 is equipped with a temperature sensor at the key monitoring position on the surface to monitor the temperature of the generator. When the monitored temperature exceeds a predetermined value, an instruction will be sent to the control module 2. The execution module 9 starts or stops the generator according to the instruction of the control module, which can prevent the diesel generator set 1 from malfunctioning due to excessive temperature.

[0019] In summary, the diesel generator set parallel control system:

[0020] 1. By setting multiple diesel generator sets 1 in parallel and setting a control module 2 in each parallel circuit, each diesel generator set 1 can not only be set up independently, but also can be connected in parallel to supply power to the load 5, thereby improving the reliability and continuity of the power supply system. Multiple units are connected in parallel to form a power grid, and the voltage and frequency of the power supply are stable, which can withstand the impact of large load changes, thereby improving the reliability and continuity of the power supply system. Multiple units are used in parallel, and active loads and reactive loads can be centrally dispatched and allocated, which can make maintenance and repair convenient and timely. In addition, a current monitoring module 3 is provided in each parallel branch, which can monitor the output AC current phase. When the AC current phase changes, the signal can be transmitted to the control module 2 in time, the signal from the control system can be received, and the speed of the generator can be adjusted according to these signals. The AC current phase can be adjusted in time, which can ensure the stable operation of the generator under various load conditions and improve the efficiency and stability of the entire power system.

[0021] 2. The wires connected in parallel between the control modules 2 are MSC two-core shielded control wires. The two-core shielded control wires have excellent shielding performance, can effectively suppress interference signals, and ensure clear transmission. In addition, each diesel generator set 1 is equipped with a temperature sensor at the key monitoring position on the surface to monitor the temperature of the generator. When the monitored temperature exceeds a predetermined value, an instruction will be sent to the control module 2. The execution module 9 starts or stops the generator according to the instruction of the control module, which can prevent the diesel generator set 1 from malfunctioning due to excessive temperature.

Claims

1. A diesel generator set parallel control system, characterized in that: The invention comprises a diesel generator set (1), wherein the number of the diesel generator sets (1) is several, the several diesel generator sets (1) are arranged in parallel, the input end of each diesel generator set (1) is electrically connected to a control module (2), the several control modules (2) are arranged in parallel via wires, the output end of the diesel generator set (1) is electrically connected to a current monitoring module (3), the output end of the current monitoring module (3) is electrically connected to the control module (2), the output end of the control module (2) is electrically connected to a speed regulating module (4), and the speed regulating module (4) is electrically connected to the diesel generator set (1).

2. A diesel generator set parallel control system according to claim 1, characterized in that: The output ends of the plurality of diesel generator sets (1) connected in parallel are electrically connected to a load (5), and a first switch (6) is provided between the load (5) and the diesel generator set (1).

3. A diesel generator set parallel control system according to claim 2, characterized in that: The output end of the diesel generator set (1) is electrically connected to a second switch (7), and the second switch (7) is electrically connected to the control module (2).

4. A diesel generator set parallel control system according to claim 3, characterized in that: The current monitoring module (3) is located between the second switch (7) and the diesel generator set (1), and the current monitoring module (3) is a current sensor.

5. A diesel generator set parallel control system according to claim 4, characterized in that: The wires connected in parallel between the plurality of control modules (2) are MSC two-core shielded control wires.

6. A diesel generator set parallel control system according to claim 5, characterized in that: The output end of the diesel generator set (1) is electrically connected to a temperature monitoring module (8); an execution module (9) is electrically connected between the diesel generator set (1) and the speed regulating module (4); the execution module (9) is electrically connected to the temperature monitoring module (8); the temperature monitoring module (8) is a temperature sensor; and the execution module (9) is a solenoid valve.

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