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First, the product brief
High-voltage reactive power compensation device equipment is suitable for power transmission and transformation system software with frequency of 50Hz and rated current level of 6kV, 10kV and 35kV. It is used to compensate system software reactive power, improve power factor, adjust power grid operating voltage, and reduce route loss. Improve the quality of the power supply system, improve the application efficiency of power supply and distribution machinery and equipment, and the volume can range from more than 100 Kvar to hundreds of thousands of Kvar.
Second, the principle
The high-voltage reactive power compensation device is composed of an isolating switch, a vacuum contactor, a capacitor, a series reactor, a discharge coil, a voltage transformer, a zinc oxide surge arrester, a control device thereof and an accurate measuring protector, and the complete equipment structure can be divided into a cabinet type and Architectural. Capacitors and series reactor loops are divided into groups and each uses vacuum contactors to perform sorting and switching, which is used to compensate system software reactive power and improve power factor.
Third, characteristic characteristics
1. Use high-quality rolling low-voltage capacitors with high reliability, long life, low loss and low operating temperature;
2. The difference between the rated capacitors of the capacitors of the high-voltage reactive power compensation device does not exceed 0~10% of the rated current, and the ratio of the highest value to the smaller value of the intermediate capacitors of all the two-way terminals of the equipment does not exceed 1.06; 3, the insulation level of the equipment: 6kV rated current equipment, the main power circuit two colors and phase and ground, DC tolerant work
4, the equipment for the common internal faults of the capacitor, in addition to the maintenance of each circuit breaker, according to the main wiring form is different, set up a different relay protection device. The maintenance of the capacitor bank can be maintained by the working voltage of the port triangle, the maintenance of the unbalanced current of the neutral point, or the differential protection of the working voltage;
5. The equipment is allowed to operate for a long time under 1.1 times of rated current of DC;
6. The device is allowed to continue to operate under the steady-state overcurrent of 1.3 times the rated value due to overvoltage and high-order pulse current;
7. Capacitor external charge and discharge equipment can reduce the residual voltage of the capacitor to below 50V within 5S after the machine is turned off.
8. Optional series reactor with a reactance rate of 1%-13% to limit the inrush current and suppress the special secondary pulse current.
Fourth, the use of goods
Reactive power compensation for 6KV, 10KV, 35KV busway of 220KV and the following distribution network substations, used in metallurgical industry, mining, crude oil, chemical plants, machinery and equipment, decorative building materials, municipal engineering, light industry and other manufacturing industries .