The quality of the generator set mainly depends on the quality of the engine. The 2000kw ones are MTU, cummins, Mitsubishi, and domestic Youji Chai. If it is not a particularly important emergency, it is recommended to choose domestic ones if you are patriotic, which is also good to use. Original imported unit brands: Caterpillar, Cummins Electric, Kohler (MTU), MTU and some German assembled units have entered the domestic market, but the sales volume is not large. Domestic assembly is mainly Cummins and MTU. Because of its large power, owners are more cautious in choosing. Moreover, the domestic assembly price advantage is not obvious, and more imported from originals. If you use 2000kw, it is mainly a competition between Caterpillar and Kohler, but the price difference is not big, and most customers will choose Caterpillar.

Jiangsu Haixing Power reviewed the after-sales service information in 2010 and found that some customers failed to detect problems in time when the synchronous generator set oscillated and lost steps, resulting in damage to the unit. Then, Haixing Generator Unit guides you to judge which generator is out of step from the instructions of the meter, thereby solving the problem and ensuring the smooth operation of the unit. There are generally three steps to deal with accidents. First of all, we need to understand the essence of the problem: what are the oscillations and loss of steps in the generator set? As we all know, when the synchronous generator is operating normally, the rotation speed of the rotor and the synchronous rotation speed of the stator magnetic field are in a synchronous state. However, when the load suddenly changes, due to the inertia of the rotor, the rotor displacement cannot be stabilized immediately at the new value, but it will cause several swings around the new stable value. This phenomenon is the oscillation of the synchronous generator. When the speed of the unit that oscillates no longer coincides with the synchronous speed of the stator magnetic field, the generator and the power system are different.

In order to improve the stability of the generator set operation system, many users will forcefully excite the generator during use. So why do we need to implement strong incentives? What factors need to be considered for strong incentives? Improper operational post-processing methods will be explained to you by Jiangsu Haixing Power. As a professional manufacturer of generator sets, Haixing generator sets are professional in science and technology and have a leading level in the industry. The main operating brands include: Cummins, Volvo, Dongfeng, Weichai, Shangchai and other diesel generator sets, which have passed the national quality inspection and certification and have been highly praised by customers. First, why do we need to excite the generator set? What are the benefits of doing this? In order to improve the stability of the generator operating system, the voltage can quickly return to normal state after the short circuit failover. When the voltage drops to the corresponding value, the excitation energy of the generator will increase immediately, so the generator must implement forced excitation. Second, what factors are restricted by the time of strong incentives? Strong motivation

Since April 6, fuel prices at gas stations in various places have been on the verge of rising prices, and there have been long queues of refueling overnight in many places. The National Development and Reform Commission decided to increase the price of gasoline and diesel by 500 yuan and 400 yuan per ton from 0:00 on April 7, and the national average price of gasoline and diesel by 0.37 yuan and 0.34 yuan per liter, respectively. This is the second time that domestic refined oil prices have been raised this year. This is a concern for many automobile and generator set users. Under the condition that fuel prices cannot be controlled, reducing the fuel usage of engines is the only good way. If the engine fuel consumption is too high, the cause should be carefully checked and eliminated to ensure the normal operation of the generator set. The main reasons for high fuel consumption are as follows: 1. Oil leakage from the generator set or engine. The front oil seal of the engine crankshaft leaks, and there are many such faults. The crankshaft oil seal is a skeleton rubber oil seal, due to the installation and quality of the oil seal

As we all know, the generator is composed of stator, rotor, end cover, base, bearing and other components, while the stator is composed of other parts such as iron core, wire winding, etc. During the operation of the generator set, we ask the technicians of Jiangsu Haixing Power for the individual points and temperatures of the stator core. As a professional manufacturer of generator sets as the manufacturing and sales, the 'Haixing' brand has been widely praised by customers and has strong technical strength. 1. How should we solve the problem of generally increasing temperatures in various parts of the stator core during the operation of the generator set? Answer: If the temperature and temperature rise of each part of the stator core exceeds the normal value during operation, check whether the three-phase current of the stator is balanced, check whether the air inlet temperature and inlet and outlet air temperature difference and whether the cooling water system of the air cooler is normal. If the cooling water is interrupted or the amount of water is reduced, water should be supplied immediately or the amount of water should be increased; if it is caused by the three-phase current imbalance of the stator, the cause should be found and eliminated. In addition, contact Thermal Engineering

Start-stop protection During the start-up or shutdown of the generator, the protection of interphase faults and the protection of stator ground faults are configured. Since the stator voltage frequency is very low during the generator start or shutdown, the protection uses an algorithm that is not affected by the frequency, ensuring the protection of the generator during the start and shutdown. The above start-stop protection input can be locked by low-frequency components or through circuit breaker position auxiliary contacts. (Copyright © WWW.HXDLKJ.COM) When the generator is powered on by mistake, the generator is not excited and the circuit breaker is accidentally closed, causing the generator to start asynchronously. During the start and stop of the generator, the excitation has been added, but the frequency is lower than a certain value, and the circuit breaker is incorrectly closed. The low-frequency criterion delay is used to input 0.2s, and the frequency criterion delay t1 returns, and the time should ensure the completion of the tripping process. During the start and stop of the generator, excitation has been added, but the frequency is greater than a certain value, and the circuit breaker is incorrectly connected or inconsistent. Use break

As a manufacturer specializing in the production and sales of generator sets, Jiangsu Haixing Power has been committed to the generator set industry for decades and is a 'old Chinese medicine doctor' in terms of technology. Listen to customers to show that the excitation generator set has demagnetization symptoms during normal use. After the pulse diagnosis of the Haixing generator set, the medical record details are as follows: Symptoms: The reactive power meter is reversed, the stator current swings periodically, the active load is slightly lower, the stator voltage is reduced, and the rotor voltage and current have different indications according to the fault point. When the rotor circuit is disconnected, the voltage rises and the current is zero; the excitation circuit or armature circuit of the exciter is disconnected, and the voltage and current are close to zero. The demagnetized generator has a loss of the magnetic field and the electromagnetic torque decreases, while the prime mover torque does not change. Therefore, the unit speed increases, and the rotor and stator magnetic fields have a relative speed, that is, there is a slip between them and the disengagement and synchronization occurs. There is a slip between the rotor stators, and the generator generates asynchronous torque, which is balanced with the torque of the prime mover.

Many companies need to run generator sets in parallel to meet power needs. Jiangsu Haixing Power gave its own understanding and analyzed the issues that enterprises are concerned about from the different methods of generator set parallelism. Generally, generator parallel methods are divided into two categories: quasi-concurrent method and self-concurrent method. We analyze from their advantages and disadvantages: A. Advantages of quasi-contemporal method parallelism: (1) The generator has no impact current when closing; (2) It has no impact on the power system; B. Disadvantages of quasi-contemporal method parallelism: (1) If the parallelism is caused by some reason, the impact current is very large, even twice as large as the three-phase short-circuit current at the end; (2) When manual parallelism is used, it is not easy for operators to master the advanced time of the parallel operation. A. Advantages of parallelism since the same period: (1) The operation method is relatively simple and the automation of the closing process is also simple. (2) In the event of an accident, the switch is closed quickly. B. Disadvantages of parallel rankings since the same period: (

When searching for generator sets such as Baidu Know, Soso Questions and Google Q&A, Haixing Generator's employees found that many questions were related to the generator's active and non-reactive, so they specially answered them in detail for netizens. Below, Jiangsu Haixing Power Technology adopts a question-and-answer model to explain common questions. First of all, we need to understand the basic concept: What is merit? What is resonance? Answer: During the generation, transmission and use of alternating current energy, the part of energy used to convert into non-electric and magnetic forms is called active; the part of energy used for electrical and magnetic exchange in the circuit is called reactive. Q: What is power rate? What are the progression phase and the delay phase of force? Answer: The power factor of an AC motor is also called the force rate, which is equal to the ratio of active power to apparent power. The so-called incoming phase of force rate is to send out the operating state of active absorption of reactive power; the late phase of force rate is to generate both active and reactive power. Secondly, the actual situations related to active and reactive power encountered during the regulation and use of generator sets

In cold areas or winter, the major problem facing the operation of generator sets is water circulation. Many customers ignore such details, so Jiangsu Haixing Power will check it out for everyone. A comprehensive analysis is made from the selection of generator set cooler water to maintenance. 1. Clean 'soft water' is usually used for the unit cooler water. Soft water is usually rainwater, snowwater and riverwater. These waters contain little minerals and are suitable for engine use. The mineral content in well water, spring water and tap water is high. These minerals are easily deposited on the water tank wall, water jacket and water channel wall when heated, forming scale and rust, which makes the engine heat dissipation ability worse and easily leads to the engine overheating. The added water must be clean. The impurities contained in the water will block the waterway and aggravate the wear of components such as the pump impeller. If hard water is used, softening must be performed in advance. The softening methods usually include heating method and adding alkali (commonly caustic soda). 2. Note: Do not start first and then add water. In winter