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Anonymous users2024-02-051. For reactive power compensation, there are three kinds of compensation: centralized compensation, decentralized compensation and follower compensation;
2. The so-called centralized compensation is to install a power capacitor bank on the distribution cabinet of the main distribution room under the transformer to compensate the reactive power of the transformer and the load it carries, that is, it is compensated here; Generally, the compensation capacity is large.
3. The so-called decentralized compensation is to install capacitor banks for reactive power compensation in each workshop, that is, on the distribution cabinet (box), because a transformer may bring several workshops, so the following compensation capacitors may also be divided into several groups, and the compensation mode of dispersing the reactive power compensation in the following workshops is decentralized compensation; The compensation effect of dispersed compensation is better than that of centralized compensation because of the proximity to the load that needs to be compensated.
4. The so-called random device compensation is to connect the capacitor in parallel with the equipment that consumes reactive power, and the capacitor is also put into the machine as soon as it is opened, which is the best way to balance the reactive power on the spot, but the management requirements are high, and it is not easy to do it under normal circumstances.
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Anonymous users2024-02-041》Centralized compensation generally refers to the control of automatic compensation near the main switch of the distribution room; Decentralized compensation generally refers to the distribution of fixed amount compensation at the end of major power loads.
2》The capacity specifications of a single capacitor are 10 30 thousand and so on, and the input amount is automatically analyzed by the reactive power automatic controller according to the line force rate, and the capacitance of general application is 16,000 yuan each. When a single capacity is too large, it is possible to overcompensate for the amount of one that is too large, so it is usually easy to adjust if the single capacity is not too large.
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Anonymous users2024-02-03It is equipped with an automatic cutting device.
Automatically adjusts the power factor.
The size of the compensation capacitance is automatically calculated based on the fluctuation of the load.
Then it was decided to put a few capacitors into the circuit.
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Anonymous users2024-02-02The automatic compensation control on the bus of the power distribution equipment is the centralized compensation capacitor cabinet, and the compensation of the major power loads below is the decentralized compensation capacitor cabinet.
The size of capacitor distribution is related to the size of load calculation compensation and the number of switching devices, etc., and the selection of a single capacitor should not be too large, because the oversized capacitor will cause overcompensation, generally not more than 30kvar, and then use the automatic adjustment controller to put in the number of channels.
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Anonymous users2024-02-01The content and title of your question don't mean the same thing.
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Anonymous users2024-01-31Hello, I am glad to be able to ask you about the difference between single-phase compensation and interphase compensation in capacitance compensation: the requirements for capacitors are different. The details are as follows:
Single-phase sub-compensation is to connect the capacitors of each phase to the line of each phase separately, and each capacitor only compensates for the current of each phase, without affecting the current of other phases. Phase-to-phase compensation is to connect the capacitor between the three-phase lines, and the compensation current of the capacitor also affects the current of the three-phase line. The advantage of single-phase subcompensation is that it can effectively compensate the current of each phase without affecting the current of other phases, reducing the capacity of the capacitor and saving the cost, but the installation is troublesome, and three capacitors need to be installed, and the capacity of each capacitor is also required to be higher.
The advantage of interphase compensation is that only one capacitor needs to be installed, and the installation is simple, but because the compensation current of the capacitor affects the current of the three-phase line at the same time, the capacity requirements of the capacitor are higher, and the compensation effect of the capacitor is not as good as that of single-phase compensation.
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Anonymous users2024-01-30Summary. Hello dear, happy to answer your <>
Capacitance compensation is a measure used to improve the power factor of the power system and stabilize the system voltage. Single-phase sub-compensation and phase-to-phase compensation are two different connections in capacitance compensation. <>
Single-phase sub-compensation refers to the connection of capacitors to single-phase lines to compensate for the reactive power caused by single-phase loads. The advantage of the single-phase offset connection method is that the compensation effect is obvious, and it is very effective when compensating the reactive power of single-phase load. However, single-phase subcompensation usually requires more capacitors to achieve the same power factor improvement effect, so the cost is higher<>
What is the difference between single-phase compensation and interphase compensation in capacitance compensation?
Hello dear, happy to answer your <>
Capacitance compensation is a measure used to improve the power factor of the power system and stabilize the system voltage. Single-phase compensation and interphase compensation are two different connection trace loss methods in capacitor compensation. <>
Single-phase sub-compensation refers to the connection of capacitors to single-phase lines to compensate for the reactive power caused by single-phase loads. The advantage of the single-phase offset connection method is that the compensation effect is obvious, and it is very effective when compensating the reactive power of single-phase load. However, single-phase subcompensation usually requires more capacitors to achieve the same power factor improvement effect, so the cost is <>
Phase-to-phase compensation refers to connecting a capacitor to the phase of a three-phase line to compensate for the reactive power of a three-phase load system. The advantage of the phase-to-phase compensation connection method is that the reactive power of the three-phase load can be compensated at the same time at a lower cost. A: However, the effect of interphase compensation on the loss of power factor caused by single-phase factors is relatively weak<>
Here are some <> related extensions that we hope you will find helpful
Single-phase sub-compensation and interphase compensation have their own applicable scenarios, and the specific conditions of the system and the load characteristics that need to be compensated need to be considered to select the appropriate connection method
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Anonymous users2024-01-29Summary. Hello dear, happy to answer your <>
The differences between single-phase compensation and interphase compensation in capacitance compensation are as follows:1Different types of loads are targeted:
Single-phase compensation is suitable for three-phase unbalanced loads, and interphase compensation is suitable for three-phase balanced loads. 2.The number of phases of the compensation is different:
Single-phase sub-compensation can compensate for the power factor of one phase, and interphase compensation can compensate for the power factor of three phases. 3.The connection is different:
Single-phase compensation connects a capacitor to a single phase, and interphase compensation connects a capacitor between two adjacent phases.
What is the difference between single-phase compensation and interphase compensation in capacitance compensation?
Hello dear, happy to answer your <>
The difference between single-phase compensation and interphase compensation in the capacitance compensation section is as follows:1Different types of loads are targeted:
Single-phase compensation is suitable for three-phase unbalanced loads, and interphase compensation is suitable for three-phase balanced loads. 2.The number of phases of the compensation is different:
Single-phase compensates for the power factor of one phase, and interphase compensation can compensate for the power factor of three phases. 3.The connection is different:
The single-phase offset grip connects the capacitor to a single phase, and the phase-to-phase compensation connects the capacitor between two adjacent phases.
4.The difficulty of implementation is different: single-phase compensation is simpler than interphase compensation, because it only needs to be connected to one phase, and interphase compensation needs to take into account the balance between the three phases.
By understanding the difference between single-phase sub-compensation and interphase compensation, we can better select the pure compensation method suitable for the load type and implementation difficulty, so as to ensure that the power factor of the power grid is effectively compensated and improve the operation efficiency and <>stability of the power grid
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Anonymous users2024-01-28The use of parallel capacitance compensation is determined by the connection mode between the line and the load: on the low-voltage line (below 1kv), because most of the electrical equipment is a motor, it is an inductive load, and it is a parallel connection, the line needs to compensate for the inductive reactive power, so it is necessary to compensate for the capacitor in parallel. Tandem cannot be compensated.
High-voltage transmission lines, especially high-voltage cables, are capacitive at the power supply end, so line compensation is often called series inductance (called reactor in electricity).
It is usually connected in series in ultra-high voltage lines of 330kV and above, and its main role is to improve the system voltage from the perspective of compensating (reducing) reactance, so as to reduce power loss and improve the stability of the system.
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Anonymous users2024-01-27AA to improve the power factor is to reduce the reactive power of the system, because the reactive load of the actual system is mainly inductive load, so the reactive current of the actual system is mainly inductive reactive current. The phase lag voltage of the inductive reactive current is 90 degrees, the phase lead voltage of the capacitive reactive current is 90 degrees, and the phase of the capacitive reactive current is exactly opposite to that of the inductive reactive current, so the capacitive reactive current can cancel the inductive reactive current. In most cases, capacitors can be used to compensate for the reactive current generated by the load, which is reactive power compensation.
When the compensating device is installed, the total current (apparent current) of the circuit is reduced! The current and power (active and reactive) of the inductive load (load) are constant!
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Anonymous users2024-01-26Depends on the incomprehension!
At 31kV at the end, the line voltage drop is .
Line impedance (voltage per live wire).
zl=|zl|=
The line current is:(
At this point, the terminal apparent power is.
Using capacitance compensation, the compensation should be reactive, but the original active power has been reached, that is to say, after compensation, the active power has also decreased!
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