Why is the power factor only 0 8 capacitors not invested

If you want to confirm: please hit the running mode to manual, put in two ways, and look at the power factor (it should be, put in one more way, and then see what the power factor is.

If the power factor is rising and is less than, it means that there is a problem with the controller: whether it is a problem with the control itself; Whether it is a problem with the parameter setting of the controller itself (such as the target power factor or the upper and lower limits of switching) and so on.

If the power factor is negative at this time, it means that the reactive power in your system at this time is already very small, and then invest one way at this time, the capacitive reactive power of over-compensation is greater than the perceptual reactive value of not making up this way, and it should no longer be made up at this time: although the power factor is low, the compensation is worse than not making up, of course, it is no longer invested.

If this is the case, the switching setting of your controller is based on the reactive power of the system as a necessary condition for the switching capacitor.

The kind of algorithm you're talking about should be said to be extremely accurate.

But be careful: the algorithm is accurate, but because the capacitor has a loss of capacity in use, there is generally a margin.

There is no definite statement on how much this margin is, and it is generally about 15% of the amount that needs to be compensated.

I am a professional in reactive power compensation and filtering, if you need anything, you can continue to contact.

The capacitor is too small, replace the big one.

Hello dear and happy to answer your <>

What is the reason for the power factor of all the input capacitors 1. The reactive power gap is large. The power factor of the inductive load in the line is too low, and the active power is large, resulting in too large a gap in the power of the work without liquid cracking, and the total input of the capacitor does not cause the change of the power factor. But the possibility of this reason is very small.

At the beginning of the general design, we will configure the capacitor according to 20% and 40% of the transformer capacity, even if it is at least 20%, then if all the investment is made, it is impossible that the power factor will not change a little. 2. The main circuit of the capacitor is not connected, only the control circuit is connected, and the contactor is just being airdropped. In ordinary times, I have also encountered this kind of problem, some users pull down the branch switch of the capacitor and forget to push it up, the power supply of the controller loop is generally taken from the lower port of the main switch, so it can be switched, but the capacitor is not really connected, so the power factor remains unchanged.

3. Bright and regret the wiring error. The current and voltage signals of the power factor meter or capacitor switching controller are incorrectly connected, which will also lead to inaccurate indications. 4. The instrument is damaged.

In particular, if the mechanical power factor meter is bumped during installation and transportation, the mechanical structure may be misaligned or stuck, resulting in no change in its pointer. 5. Capacitor capacity attenuation. If the capacitor has been used for a long time, due to its own characteristics, the capacitor will naturally decay with normal use, especially in the environment where the working voltage is too high and the working temperature is too high, the attenuation will be faster, and the capacity will be reduced to less than half.

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Summary. The capacitor itself is a passive component that can only store and release energy in the circuit and cannot consume active power. In AC circuits, capacitors respond to voltage changes by storing charges, forming an electric field, and providing reactive power in the circuit by reversing capacitive currents.

The capacitor itself is a passive component that can only store and release energy in the circuit, and cannot consume active power. In AC circuits, capacitive trackers respond to voltage changes by storing charges, forming an electric field, and providing reactive power in the circuit by reversing capacitive currents.

Can you tell us more about that?

Due to the characteristics of the capacitor, when it is connected to the AC circuit, it will produce a certain capacitive current, but there is a phase difference of 90 degrees between this current and the voltage, and it does not actually do work. Therefore, the capacitor does not generate active power in the AC circuit, and at the same time does not affect the load of the grid, only the reactive power and power factor. Specifically, the existence of capacitors can bring some beneficial effects, such as improving the power factor of the circuit, reducing the reactive power in the grid, improving the voltage quality, etc., but it will not produce active power.

Therefore, capacitors are usually used for reactive power compensation, and the power factor is an index that reflects the proportional relationship between active power and reactive power. Because capacitors themselves do not produce active power, there is no concept of power factor.

When the total power factor of the electricity consumption unit is lower, the shunt capacitor should be put in.

Power Factor Adjustment Electricity Tariffs and Standards:

For industrial enterprises, the level of power factor will affect the electricity bill paid by the enterprise. According to the "Measures for Adjusting Power Factor Electricity Charges", when the power factor is lower than the corresponding standard, the enterprise needs to pay an additional power adjustment fee (equivalent to a fine) to the Electricity Bureau; When the power factor is higher than the corresponding standard, the enterprise can get a certain percentage of electricity fee reduction (equivalent to an incentive).

Attention to power capacitor compensation:

To install the reactive power compensation of the electric power capacitor, it is necessary to pay attention to the selection of compensation capacity. If the compensation capacity is low, the reactive power compensation effect cannot be achieved, and the economic efficiency of the enterprise will not be greatly improved; If the compensation capacity is too high, there may be problems such as no filial piety and overcompensation, which may lead to a series of failures. Therefore, when using power capacitors for compensation, it is necessary to select the appropriate compensation capacity.

With the continuous development of industry, the concept of reactive power compensation is deeply rooted in the hearts of the people, and more and more enterprises have begun to use power capacitors for reactive power compensation. <

Summary. Pro, the power factor refers to the ratio of the useful work to the apparent work in the circuit, <> in general, when the power factor is lower, it <>

It is necessary to invest capacitors to compensate for reactive power, improve the power factor<> the existence of reactive power will lead to an <>increase in the energy consumption of the power grid

At the same time, it also has an impact on the operational stability of electrical equipment<> therefore, for electrical equipment and large-scale industrial production equipment that need to be operated for a long time, the power factor <> required to be above <>

In order to ensure the operation efficiency and safety <> of the equipment

For some small devices that operate for a short period of time, <>

When the power factor is lower, it <>

It may not be necessary to invest in capacitors to compensate for the <>

It needs to be judged and dealt with on a case-by-case basis<>

How much less power factor is to put in capacitors.

Pro, the power factor refers to the ratio of the useful work to the apparent work in the circuit, <> in general, when the power factor is lower, it <>

It is necessary to invest capacitors to compensate for the reactive power and improve the power factor<> the existence of reactive power will lead to the increase of energy consumption of the power grid in Heting<> and also have an impact on the operational stability of electrical equipment<> therefore, for the electrical equipment and large-scale industrial production equipment that need to operate for a long time, the power factor <> required to be above <>

In order to ensure the operation efficiency and safety <> of the equipment

For some small devices that operate for a short period of time, <>

When the power factor is lower, it <>

It may not be necessary to cast a tape pat into the capacitor to compensate for the <>

It needs to be judged and dealt with on a case-by-case basis<>

Under what circumstances can high-voltage capacitance compensation be put into operation?

Pro, high-voltage capacitor is an important component in the compensation circuit, which is <> used to improve the power factor of the circuit and <>

Reducing the good spine reactive power in the grid and improving the power quality <> high-voltage capacitance compensation usually needs to be put into operation only in the following cases:<>1There is a large number of well-known inductive loads in the circuit, <>

Such as motors, transformers and other equipment, <>

When these devices transmit electrical energy, they will produce more reactive power<> resulting in a decrease in the power factor of the circuit<>

It is necessary to invest in a high-voltage capacitor compensator to improve the power factor<>2There are long transmission lines in the power grid, <>

These lines create an inductive impedance <>

Causes the power factor of the circuit to drop and <>

It is also necessary to invest in high-voltage capacitance compensators to improve the power factor<>3There is a large nonlinear load in the power grid, <>

Such as electronic devices, chargers, etc., <>

These devices will generate large harmonic currents on the grid<>

Harbin <> that leads to a decline in the power quality of the power grid

At this time, it is also necessary to invest in high-voltage capacitance compensators to improve the power quality and penetration<> but the operation of high-voltage capacitance compensators needs to be judged and determined according to the specific situation<> improper use will lead to circuit failure or equipment damage<>

The <> that should be operated under the guidance of a professional

When the power factor is normal, there is usually no danger in putting the red-of-code capacitor into the circuit. Capacitors can be used to improve the power factor of a circuit and increase the efficiency of the circuit. In general, a normal power factor (close to 1) indicates that the circuit load is well matched to the power supply, and the phase difference between current and voltage is small.

But there are a few things to keep in mind:

1.Voltage rating: Make sure the voltage rating of the capacitor is high enough to prevent voltage overload from causing damage or rupture of the capacitor.

2.Rubber mold lifting position: The capacitor should be installed in a suitable location and method, and follow the relevant safety standards and guidelines. Ensure that the capacitor is properly grounded and properly insulated to protect against electric shock and other safety risks.

3.System design and operation monitoring: Before capacitors are put into operation, the system should be properly designed and evaluated to ensure that the capacity and number of capacitors match the load demand.

In addition, the operating status of the capacitor, such as voltage, current, and temperature, should be monitored regularly in order to detect potential faults or problems in time.

To sum it up. When the power factor is normal, the input capacitor is usually safe, but the relevant safety measures and standards still need to be followed to ensure the normal operation of the capacitor and the safety of the system.

— 1. The average power is not reactive power, but active power. The power of the capacitor is pure reactive power, and its active power is zero, so the average power is zero.

2. The power of the capacitor is the pure reactive power, which is the product of voltage and current (the three-phase capacitor circuit should also be multiplied by the root number 3), and the capacitor provides the reactive power (the power factor is compensated), which is not zero.

Oh To understand that shunt capacitors can improve the power factor of inductive loads, we must first understand the power factor.

Power factor is a data used to measure the power efficiency of electrical equipment (including generalized electrical equipment, such as transformers, transmission lines, etc.) of the power grid.

The formula for defining power factor: power factor, active power, apparent power.

Active power is the power consumed by the device and converted into other energy.

Reactive power is the amount of energy that keeps equipment running, but does not consume. It is stored between the grid and the equipment, and is an indispensable part of the energy of the power grid and the equipment. Since the grid has to store a large amount of reactive power, the transmission of active power is reduced, resulting in a decrease in grid efficiency.

Okay, let's talk about the physical essence of capacitive compensation for inductive load reactive power:

When the inductive load is running in the power grid, its reactive power is transmitted as follows: the grid voltage waveform is used to refer to the 1 2 cycles when the voltage starts, the inductive load absorbs the reactive power from the power grid, and the inductive load sends the reactive power back to the grid in the following 1 2 cycles.

The capacitor also needs reactive power to operate in the grid, but its demand time is exactly 180 degrees (or: inverted) from the inductive load: 1 2 cycles after the voltage starts, the capacitor sends the reactive power back to the grid.

After 1 to 2 cycles, the capacitor absorbs reactive power from the grid.

Therefore, we can use capacitors to replace the power grid, when the inductor absorbs reactive power, the capacitor emits reactive power, and conversely, when the inductor emits reactive power, the capacitor absorbs reactive power. The capacitor is used to provide or absorb reactive power on behalf of the power grid, and the capacitor and the inductive equipment are regarded as a new combined equipment, so that the power grid mainly provides active power to this "combined equipment", and less reactive power is provided, which is the essence of the capacitor to improve the power factor of the inductive load.

There is a concept to be clear here: the power factor of the inductive load is a fixed value, the assessment of reactive power is from the port of the power supply end, the parallel capacitor is combined with the inductive equipment to form a new "combined device", and the power factor of the "combined equipment" is improved, that is, the power supply port sees that the power factor of the load is improved.