Xu Shuang Ankerui Electric Co., Ltd., Shanghai Jiading 201801 I. Industry status Domestic chemical industry mainly includes coal chemical industry, petrochemical industry, salt chemical industry, pharmaceutical chemical industry and so on. The production operations of chemical companies are generally continuous, mainly reflected in the continuity of logistics and the stability of the entire system. Not only materials, logistics, but also water, electricity, gas, heating and so on. In other words, the industry has basically no impact load. There are only different load sizes at different times or no changes in load (1). Second, the necessity of reactive power compensation in the chemical industry The power consumption in chemical production occupies a large proportion in the production cost. From the perspective of power saving, although power management has been strengthened and some power-saving products have been promoted, it has not yet met the requirements of the state for energy conservation and consumption reduction of enterprises. The power factor has been running between 0.4-0.7 for a long time, and a lot of invalid energy consumption has been achieved. It is quite serious, and it is often fined because the power factor cannot meet the requirements. At the same time, extensive application of power electronic equipment to generate harmonic currents and harmonic voltages is seriously polluting the power grid. The main causes of the increasingly serious harmonic problems are as follows: effective and flexible control over reactive power, harmonics, and three-phase imbalances cannot be implemented, and the overall quality of the power cannot be improved, and the harmonic content is reduced, making the operating environment of the power grid increasingly hostile. At the same time, there are great hidden dangers to the safe operation of the equipment. In view of this, in order to reduce the large amount of reactive power consumption, fines in the power sector, and safe operation of equipment, it is necessary to perform reactive power compensation (1). Third, the choice of ARC power factor controller Ankerui's ARC power factor controller strictly complies with the requirements specified in professional standards such as DL/T597 "Low-Voltage Reactive Power Compensation Controller Ordering Specifications" and JB/T9663 "Low-Voltage Reactive Power Automatic Compensation Controller" and other professional standards. According to the specific compensation requirements and load characteristics of the chemical industry. In general, the controller can be selected from the following aspects: Table 1 Product Application model Load requirements Compensation method Switch Capacitor Compensation plan ARC-6/J ARC-8/J ARC-10/J ARC-12/J Three-phase balanced load; and the reactive power is relatively stable, and users who do not need frequent switching of capacitance compensation are required. Single-load (high-power motor) on-site compensation and low-voltage switchgear centralized compensation Contactor Self-healing power capacitor Three-phase total compensation ARC-6/R ARC-8/R ARC-10/R ARC-12/R Three-phase balanced load, or variable load, impact load. Single-load (high-power motor) on-site compensation and low-voltage switchgear centralized compensation Capacitive non-contact switching switch Self-healing power capacitor Three-phase total compensation ARC-12F-J ARC-16F-J Three-phase balanced load; and the reactive power is relatively stable, and users who do not need frequent switching of capacitance compensation are required. Single-load (high-power motor) on-site compensation and low-voltage switchgear centralized compensation Contactor Self-healing capacitor Three-phase total compensation, sub-supplement ARC-12F-R ARC-16F-R Three-phase balanced load, or three-phase unbalanced load, variable load, impact load. Single-load (high-power motor) on-site compensation and low-voltage switchgear centralized compensation Capacitive non-contact switching switch Self-healing power capacitor Three-phase total compensation, sub-supplement 2, product selection Product number Function selection table Static output Dynamic output Overvoltage Undervoltage Overcurrent Under current Temperature protection Phase protection Harmonic protection communication Encoding ARC-6/J √ √ √ √ √ √ ARC-6/R √ ARC-8/J √ √ √ √ √ √ ARC-8/R √ ARC-10/J √ √ √ √ √ √ ARC-10R √ ARC-12/J √ √ √ √ √ √ ARC-12/R √ ARC-12F-J √ √ √ √ √ can selected √ √ Optional √ ARC-12F-R √ ARC-16F-J √ √ √ √ √ can selected √ √ Optional √ ARC-16F-R √ IV. Reactive power compensation selection in chemical industry According to the characteristics of different time load or different load in the chemical industry's production continuity and power load, it is recommended to use the ARC static output controller for the fixed load of the shunt capacitor when the power load does not change or change slowly. For power load with different time load and different working conditions, ARC dynamic output controller can be selected. According to the serious imbalance of three-phase load, choose ARC-12F or ARC-16F sub-controller. references: [1] Ankerui Electric Co., Ltd. Product Selection Guide 2013.1. [2] Analysis of Reactive Power Compensation Device Selection in Chemical Industry Assistant to General Manager of Shandong Taikai Power Electronics Co., Ltd. Gao Guozeng About the Author: Xu Shuang, female, undergraduate, Ankerui Electric Co., Ltd., the main research direction is reactive power compensation and active filter device design; Email: Mobile QQ
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