Jiangsu Haixing Power reviewed the after-sales service information in 2010 and found that some customers failed to detect the problem in time when the synchronous generator set oscillated and lost synchronization, resulting in damage to the unit. Then, Haixing Generator Set will guide you to determine which generator is out of step from the indications of the meter, so as to solve the problem and ensure the smooth operation of the unit. Dealing with accidents is generally divided into three steps. First, we need to understand the essence of the problem: What is the reason for the oscillation and loss of synchronization of the generator set? As we all know, when a synchronous generator is operating normally, the rotational speed of the rotor and the synchronous rotational speed of the stator magnetic field are in a synchronized state. However, when the load suddenly changes, due to the inertia of the rotor, the rotor displacement cannot immediately stabilize at the new value, but will cause several swings around the new stable value. This phenomenon is the oscillation of the synchronous generator. When oscillation occurs When the speed of the unit is no longer consistent with the synchronous speed of the stator magnetic field, the generator and the power system will be inconsistent.

In order to improve the stability of the generator set operating system, many users will forcefully excite the generator during use. So why should forced incentives be implemented? What factors need to be considered for strong incentives? Jiangsu Haixing Power will tell you about improper post-processing methods. As a professional manufacturer specializing in the production and sales of generator sets, Haixing Generator Set is professional in science and technology and has a leading level in the industry. The main operating brands include: Cummins, Volvo, Dongfeng, Weichai, Shangchai and other diesel generator sets, which have passed national quality inspection and certification and won strong praise from 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 the normal state after the short-circuit fault is removed. It is required that when the voltage drops to a corresponding value, the excitation energy of the generator will increase immediately, so the generator must implement forced excitation. Second, what factors limit the time of forced incentives? Forceful motivation

Since April 6, fuel prices at gas stations across the country have been on the verge of rising, and long queues for refueling have appeared in many places overnight. The National Development and Reform Commission decided to increase the prices of gasoline and diesel by 500 yuan and 400 yuan per ton respectively from 0:00 on April 7, and the national average prices of No. 90 gasoline and No. 0 diesel were increased by 0.37 yuan and 0.34 yuan per liter respectively. This is the second time this year that domestic refined oil prices have been raised. This is a concern of many car and generator set users. Under conditions where fuel prices cannot be controlled, reducing engine fuel usage is the only good way. If the engine oil consumption is too much, the cause should be carefully found and eliminated to ensure the normal operation of the generator set. The main reasons for high oil consumption are as follows: 1. Due to oil leakage from the generator set or engine. The front oil seal of the engine crankshaft leaks oil, and this type of failure is common. The crankshaft oil seal is a skeleton rubber oil seal. Due to the installation and quality of the oil seal,

As we all know, a generator is composed of a stator, a rotor, an end cover, a frame, a bearing, and other components. The stator is composed of an iron core, a wire wrap winding, and other other parts. During the operation of the generator set, we consulted the technical personnel of Jiangsu Haixing Power to deal with the temperature issues of individual points and parts of the stator core. As a professional manufacturer specializing in the manufacturing and sales of generator sets, the 'Haixing' brand is widely praised by customers and has strong technical strength. 1. How to solve the problem that the temperature of various parts of the stator core generally rises 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 inlet air temperature and the inlet and outlet air temperature difference are normal, and whether the cooling water system of the air cooler is normal. If the cooling water is interrupted or the water volume is reduced, water supply should be provided immediately or the water volume should be increased; if it is caused by the imbalance of the three-phase current of the stator, the cause should be identified and eliminated. Additionally, contact Thermal Engineering

Start-stop protection: During the starting or stopping process of the generator, protection against phase-to-phase faults and protection against stator ground faults are configured. Since the stator voltage frequency is very low during the starting or stopping process of the generator, the protection adopts an algorithm that is not affected by frequency to ensure the protection of the generator during the starting and stopping process. The input of the above start-stop protection can be blocked through low-frequency components or through the auxiliary contact of the circuit breaker position. (Copyright © WWW.HXDLKJ.COM) Incorrect power-on protection When the generator is cranking, no excitation is applied, and the circuit breaker is mistakenly closed, causing the generator to start asynchronously. During the starting and stopping process of the generator, excitation has been added, but the frequency is lower than a certain value, and the circuit breaker is mistakenly closed. The low-frequency criterion is used to delay input by 0.2s, and the frequency criterion is delayed to return by t1. The time should ensure the completion of the tripping process. During the starting and stopping process of the generator, the excitation has been added, but the frequency is greater than a certain value, the circuit breaker is misclosed or out of synchronization. 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 can be called an 'old Chinese medicine doctor' in terms of technology. I heard from customers showing excitation generator sets experiencing demagnetization symptoms during regular use. , after pulse diagnosis by Haixing Generator Unit, the details of the medical record are as follows: Symptoms: The reactive power meter indicates reversely, the stator current swings periodically, the active load is slightly lower, the stator voltage decreases, and the rotor voltage and current have different indications according to different fault points. 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. In a demagnetized generator, the rotor magnetic field disappears and the electromagnetic torque decreases, while the prime mover torque remains unchanged. Therefore, the unit speed increases, and the rotor and stator magnetic fields have relative speeds, that is, slip occurs between them and they are out of synchronization. There is slip between the rotor and the stator, and the generator produces 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 parallel methods of generating units. Generally, generator paralleling methods are divided into two categories: quasi-synchronous method and auto-synchronous method. Let’s analyze their advantages and disadvantages: A. Advantages of parallelization with quasi-synchronous method: (1) There is no inrush current in the generator when closing; (2) It has no impact on the power system; B. Disadvantages of parallelization with quasi-synchronous method: (1) If non-synchronous paralleling is caused for some reason, the inrush current will be very large, even twice as large as the three-phase short-circuit current at the machine end; (2) When manual quasi-synchronous paralleling is used, the lead time of the parallel operation will be It’s also not easy to master. A. Advantages of self-synchronization: (1) The operation method is relatively simple, and the automation of the closing process is also simple. (2) In case of accident, close quickly. B. Disadvantages of parallelism since the same period: (

When searching for generator sets on Baidu Zhizhi, Sosoouwen, Google Q&A, etc., Haixing Generator Group employees found that many questions were about the active and reactive power of generators, so they specially answered them in detail for netizens. Below Jiangsu Haixing Power Technology uses a question and answer mode to explain common questions. First of all, we need to understand from the basic concepts: What is meritorious service? What is reactive work? Answer: In the process of generating, transmitting, and using alternating current energy, the part of energy used for conversion into non-electric and magnetic forms is called active power; the part of energy used for electrical and magnetic exchange within the circuit is called reactive power. Question: What is power rate? What's going on with the advance and late phases of Lisu? Answer: The power factor of an AC motor is also called power factor, which is equal to the ratio of active power to apparent power. The so-called advancing phase of power rate is the operation state of sending out active power and absorbing reactive power; the late phase of power rate is the operation state of sending out both active power and reactive power. Secondly, the actual problems related to active and reactive power encountered during the adjustment and use of the generator set

In cold areas or winter, a major problem faced when operating a generator set is water circulation. Many customers ignore such details, so Jiangsu Haixing Power takes care of them for everyone. Comprehensive analysis from generator unit cooler water selection to maintenance. 1. The unit cooler water usually uses clean 'soft water'. Soft water is usually rainwater, snow water, river water, etc. This water contains few minerals and is suitable for engine use. Well water, spring water and tap water have high mineral content. These minerals are easily deposited on the water tank wall, water jacket and water channel wall when heated to form scale and rust, which deteriorates the engine's heat dissipation ability and easily causes the engine to overheat. The water added must be clean. Impurities contained in the water will block the water channels and aggravate the wear of the water pump impeller and other components. If hard water is used, it must be softened in advance. The softening methods usually include heating and adding lye (usually caustic soda). 2. Note: Do not start the machine first and then add water. in winter for

Since the Japanese nuclear accident, people have paid more and more attention to the safety issues of nuclear power plants. Recently, many media have paid attention to the safety of many domestic and foreign nuclear power plants.Among them, emergency diesel generator sets can increase the nuclear safety margin of nuclear power plants and ensure the safe shutdown of nuclear reactors when the entire plant loses normal and emergency AC power.As we all know, the main cause of Japan's nuclear accident was the complete damage of the backup diesel generator set, which led to the nuclear leak.Therefore, Jiangsu Haixing Power Technology Co., Ltd. has collected an article on 'Application of Additional Diesel Generator Sets in Nuclear Power Plants'.At present, nuclear power plants in most countries and regions in the world, such as France, the United States, South Africa, South Korea and Taiwan, have installed additional diesel generators.China is no exception.Let's listen to the Haixing generator technician's explanation of the function, wiring method, power supply mode, and test method of the additional diesel generator.