09Dec 2022
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Generators running in parallel mean that two or more units of the same or different sizes run with their output cables connected to a single electrical bus. The process of having generators run in parallel is called synchronization. Synchronous generators involve matching the frequency and voltage waveforms of each unit before closing the output breakers to combine the power sources together.
Usually, you would not attempt to parallel generators when the generators are out of sync. Once that's done, all power sources connected in parallel (whether power supplies or generators) must be synchronized immediately, which puts severe mechanical stress on the engine and alternator. Paralleling BISON generators together without synchronizing them first is called "dead bus synchronization" and is used in mission-critical applications where the speed of response is so critical that catastrophic failure is an acceptable risk but usually unlikely to happen.
Let's keep reading BISON parallel generator guide to find out more!
BISON believe that generators are used in parallel to increase overall system size and increase redundancy. Combining several smaller units may be more cost-effective than one larger unit.
Suppose you own a factory. You have a 500kVA generator that you have had for 2 years. The business is really good, and you want to grow your business, but the motivation is not enough. In this case, consider adding a second generator to your system, let's say another 500kVA. This will give you 1000kVA of power.
Adding additional generators to your system can increase redundancy and make the system more reliable. For example, your total power requirement is 2000kVA, but you need to buy a larger generator for load acceptance, say 3000kVA. Instead, you can buy six 500kVA units in parallel. In the case of a single failure, the 3000kVA unit will not operate in the first solution, and you will have no power. Although one of the 6 x 500kVa units is not operational in the second case, you still have 2500kVA available, giving you some redundancy.
Adding additional generators may seem like an expensive endeavor, but for many use cases, the whole system may be less expensive than other solutions. Diesel engines up to about 660kVA are produced in large numbers because they are used in many applications. Beyond this scale, the number of applications and production numbers will drop significantly, and due to the reduced volume, the price will increase. Typically this means a higher cost per kVA, and when you get to 3000kVA in our previous example system above, the price can be several times higher. Shipping costs to specific destinations are also a factor, with larger units requiring special shipping on RORO vessels rather than standard container carriers for smaller units.
Load sharing refers to the proportional distribution of kVAR and kW total load among multiple generator sets in a parallel system.
Load sharing helps avoid stability issues and overloading problems in the BISON generator set system.
When two generators run in parallel, each generator's engine governor determines the proportional share of the active power required by the system.
You can reduce or increase fuel to the system's motors to achieve kW load sharing.
How to link two generators in parallel must be something you're thinking about (step by step). Extreme caution should be used when connecting two distinct generators that have a similar phase difference, voltage, and frequency. Generators are often combined to improve overall performance. In other words, the method of connecting two different BISON generators is called paralleling. Also, the process applied to connections is called synchronization.This is the best way to increase the overall power of your plant with better and easier control over power. It helps to get work done without using money. When there is a high demand for power, and higher points are required, this method is typically used. For two generators to synchronize successfully, the output waveform needs to match the other generator. The process is usually done using a dark or synchronized mirror and brighter light method. For better security, keeping BISON generator at a higher frequency level is necessary. A generator that is already connected to a bus is called a running generator. In addition, generators need to be synchronized to be connected, called incoming generators. Under active loads, the frequency of the generator will eventually decrease slightly. So a higher frequency helps avoid running like a synchronous motor. In addition, generators are usually connected to a given bus at rest.
Most modern control panels in large industries generator manufacturers have a facility that helps to parallel them automatically. However, knowing the manual way is worth knowing, as the automatic way can sometimes fail. The synchroscope is the main item to measure the degree of synchronization. It helps to turn off the circuit breaker at the right time. In addition, it also helps to indicate the speed of the machine with the help of the pointer. When moving counterclockwise, the speed of the incoming generator is slower. Start the incoming generator and warm it up by increasing the speed. This will help it hold meetings with the necessary operating frequency. When the frequency and voltage of the incoming generator match those of the bus, pay particular attention to the control panel. Make sure the two generators you use have similar phase sequences. If necessary, necessary adjustments should be made to obtain the same voltage, phase, and frequency sequence. Make sure you are monitoring the pointer movement by turning on the synchroscope. Make sure to increase the speed of the pointer as it moves counterclockwise. When moving fast in the clockwise direction, consider reducing the speed of the alternator. Always keen to ensure that the input generator speed is still higher than the load speed. This way, the pointer will move very slowly in a clockwise direction. Watch to engage the circuit breaker before the pointer hits midnight. This will be the time when the input generator is in phase with the bus. Once done, you will need to decide if you need both generator weights or if you need to shut down the running generator. This task will ultimately be accomplished by lowering the running generator's governor switch while increasing the input generator's governor switch. Make sure you have turned off the synchronized oscilloscope you are using. Make sure to turn off the trip of the generator breaker that is running. Following BISON these steps, the generator should be on standby.
Sum up, two or more generators are operated in power plants, industries, and ships to share the load. In addition, two generators are used to increase the power output, which facilitates maintenance and reduces operating costs. The generators will run in parallel for load sharing and proper synchronization. However, most generator panels are located in control rooms or local rooms with automatic synchronization facilities. Frequency is highly considered to ensure smoothness when generators are paralleled. Furthermore, phase angle, voltage, and frequency are highly considered when related to two different generators. One generator can be synchronized with another using a dark lamp or a synchroscope.
Parallel-ready generators are used to change electrical control to alternate configurations. It could be mechanical energy or even another force. Off-the-shelf generators connected in parallel control the passage of charge through an external circuit without generating power or charge. It takes a water siphon to create the water to develop. However, it does not transfer water into it. Many parallel generators are available; the two most well-known types are petroleum and diesel. Parallel generators have a generator, and a motor mounted together to form one piece of hardware. In addition to the motor and alternator, the shunt generator has a fuel supply, a fixed motor speed controller, a cooling and exhaust frame, and a lubrication frame. Parallel-ready generators can be linked electronically through synchronization. This hints at a strategy that involves matching voltage, period, and phase before associating the generator with the instant transmission tape. The auto-sync feature automates this process. Downloads can be shared between parallel launchers via download sharing. Since the main motor of the parallel off-the-shelf generator runs at a constant speed, it takes more of the load when the fuel supply increases. If the fuel supply drops, the load will be released.
As long as you adhere to generator manufacturer's guidelines, use the correct cables required, and ensure that the generators you use for paralleling are compatible with each other as specified by the manufacturer, paralleling generators are completely safe.
Don't try any homemade tricks to connect two inverter generators that shouldn't be connected. Always stick to what your owner's manual and manufacturer say can be done safely.
A common question many generator sales professionals receive is whether it is possible to parallel two non-inverter generators of different brands.
If you've purchased a non-inverter generator and need to double the power with a second generator, it's critical to ensure this is safe for the original generator.
You will need to upgrade the power supply for something that is running, like an RV air conditioning unit.
Using two smaller portable non-inverter generators can help save carrying space and give you customizable power options.
It is safe to run two non-inverter generators of different sizes in parallel.
When adding a second generator, compatibility between the two generators must be considered in order to maximize efficiency.
Usually, simply running generators in parallel will not cause any damage. A large number of generators are designed to be connected in parallel.
It is crucial to follow all directions, as things can get a little dangerous if not done properly.
The most important thing you can do is make sure the generators you have are perfect to work together.
Paralleling BISON generators allows you to get all the benefits of an inverter without worrying about running out of power. You can rest assured that you'll have clean enough, reliable electricity to fuel your life.
Most people mention running generators in parallel because of the need for more power, especially running a campervan AC that can't be run by one generator.
For paralleling, the most significant consideration is ensuring the generators are compatible and run in parallel with specific cables.
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