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y to regulate and control the reactive power compensation device, or two who have, in order to achieve the central point regulator, so that the operation of the grid is not less affected by the trend changes or other reasons due to the formation of voltage fluctuations in the power grid accident play a supportive role of voltage, and prevent the grid voltage fluctuations The expansion of the accident.
The strength of the voltage support capabilities, in addition to compensation and compensation capacity with the size, but also with the ability to control compensation device regulation and response speed. Although it is commonly used shunt capacitor compensation equipment and inexpensive, but its reactive power output when the voltage drop will be the square of the voltage drop is not conducive to supporting voltage. Instead, a large number of parallel compensation capacitor installed an incident fueled the possibility of the collapse of the grid voltage. Using synchronous condenser and static reactive power compensation device supported by appropriate regulation and control, is an ideal support voltage reactive power compensation device. In recent years, both at home and abroad focus on the application of static compensator.
(2) with reactive power compensation
Distribution network mainly in reactive power compensation phase compensation and guarantees the quality of the main users of electricity voltage. Specific methods for the phase compensation.
(A) phase compensation (also known as the power factor compensation

Electrical appliances mostly electromagnetic structure, requires a lot of excitation power, resulting in the user's power factor are slow and low, generally about 0.7 or so. Excitation power - lag phase reactive power flow in the distribution network, not only takes up distribution network capacity, resulting in unnecessary losses, and cause the user voltage decreases. Phase compensation is based on a phase of reactive power compensation equipment (such as shunt capacitor) nearest the user or distribution network supplying the required lag phase reactive power flows in the distribution network to reduce reactive power, reduce network losses, improve voltage quality. China for large power users require the installation of reactive power compensation device, power factor compensation shall not be less than 0.9.

Third, the grid voltage adjustment
To ensure that electrical appliances are in good working voltage, avoid being with voltage fluctuations damage electrical equipment, power distribution grid voltage needs to be adjusted. Grid voltage adjustment methods: central regulator, regulating transformers and reactive power compensation regulator regulator.
1. Use of regional power plant or substation hub for central regulator
This measure is simple and economical, convenient, but it can only change the voltage level of the entire supply area, can not improve the voltage distribution. When the supply relatively broad geographic area, power distances disparity, the central regulator measures are often not take into account the region, there are trade-off shortcomings.
2 tone regulating transformers
Can compensate for the lack of central regulator means for regulating local. Regulating transformer OLTC transformers, series booster and induction regulator three. OLTC with induction regulator is generally used for 本论文由英语论文网提供整理，提供论文代写，英语论文代写，代写论文，代写英语论文，代写留学生论文，代写英文论文，留学生论文代写相关核心关键词搜索。