Automatic rural network low-voltage in situ reactive compensation adjustment method

Abstract

The invention discloses an automatic rural network low-voltage in situ reactive compensation adjustment method. Capacity increasing is conducted on a transformer, the transformer is additionally arranged, low-voltage network distribution is conducted, a voltage regulating network is installed, a variable-phase transformer is installed, a distribution transform low-voltage-side automatic switching reactive compensation device and a low-voltage line reactive compensation device are additionally arranged, a in-situ compensator device is installed for a large-power user, and a voltage boosting device is additionally arranged at the branch line tail end. The voltage boosting device comprises a three-phase unbalanced adjustment reactive compensation controller, a star connection capacitor and an angle connection capacitor. The output efficiency of the transformer is improved and the power factor of the transformer is increased through connecting the star connection capacitor and the angle connection capacitor into phases and being in combination with the three-phase unbalanced adjustment reactive compensation controller. The method starts from solving three-phase unbalance and reactive compensation, the branch line voltage change is tracked automatically, the reactive power compensation and the active power are controlled to transfer automatically among the phases to achieve balance, the transformer output efficiency is improved, the transformer power factor is increased, reasonable adjustment of the branch line voltage is achieved, the line loss is reduced, and the branch line voltage is effectively boosted.

Description

Technical field: [0001] The invention relates to a method for rectifying low voltage in a rural station area, in particular to an automatic adjustment method for in-situ reactive power compensation of low voltage in a rural power grid, and belongs to the technical field of rural power grid transformation. Background technique: [0002] Voltage is an important index to measure the quality of power supply. The quality of voltage is a matter of people's livelihood that is related to the people's "good use of electricity" and "easy use of electricity". With the rapid development of society, the living standards of farmers continue to improve, and the demand for electricity in rural areas is also increasing rapidly. A large number of single-phase equipment has been put into use, which has caused a surge in the load of the distribution station area, and the capacity of the main distribution transformer is insufficient; The power supply radius in the area is too long, the wire diam...

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Problems solved by technology

With the rapid development of society, the living standards of farmers continue to improve, and the demand for electricity in rural areas is also increasing rapidly. A large number of single-phase equipment has been put into use, which has caused a surge in the load of the distribution station area, and the capacity of the main distribution transformer is insufficient; The power supply radius in the area is too long, the wire diameter is too thin, and the active power loss is too large; the reactive power of the line is seriously under-compensated, resulting in a large terminal voltage loss; the three-phase load is seriously unbalanced, resulting in serious voltage loss

[0003] With the extensive use of single-phase loads in rural areas, the three-phase imbalance of distribution transformer loads will only become more serious, and it will develop dynamically over time. Manual adjustment alone is feasible in the short term, but it is difficult to achieve the ideal goal.

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