ANAPF harmonic filtering device selected Ankrui

Description :

　　ANAPF harmonic filtering device selected Ankrui power system are mainly divided into three types :(1) electrical equipment in the system. Including arc furnace, calcium carbide furnace and other nonlinear loads, the system of voltage regulating device, silicon controlled rectifier device and frequency conversion device, such as load will produce a large number of harmonics. (2) power transmission and transformation equipment. Power transmission and transformation equipment mainly refers to power transformers. In general, the working magnetic density of large-capacity transformers is selected on the nearly saturated section of the magnetization curve. When the transformer core is close to saturation, the non-linearity of the magnetization curve will make the magnetization current show a peak waveform, thus generating a large number of harmonics. (3) Distributed power generation equipment. The grid connection of wind power, photovoltaic and other new energy generation equipment through power electronic equipment will produce harmonics, causing pollution.

　　System Introduction

　　Function:

　　The power quality analysis and governance system mainly studies the elimination of reactive power compensation and harmonic governance problems in the power supply and distribution system. Its main products include active power filters, low-voltage reactive power compensation devices, static reactive power generators, hybrid dynamic filtering compensation devices, hybrid dynamic harmonic elimination compensation devices, intelligent dynamic reactive power compensation devices, harmonic protectors, etc. It is suitable for reactive power compensation, harmonic suppression, and comprehensive governance of electrical equipment in industrial, civil, and public buildings in new construction, renovation, expansion, and technological transformation projects. It can provide suitable design solutions according to the power quality problems of different industry types and load types, in order to improve power supply quality and ensure the safe and economic operation of the power system.

　　Application location:

　　(1) Commercial center/office building (air conditioning, elevator, thyristor dimming, etc.);

　　(2) Port terminals/chemical/metallurgical/shipbuilding/papermaking/coal mines (frequency converters, etc.);

　　(3) Communication/Medical/Commercial Center (UPS, Switching Power Supply, etc.);

　　(4) Photovoltaic/charging station/chemical/metallurgical (rectifier, etc.).

　　System functions

　　ANAPF active power filter

　　The ANAPF series active power filters are connected in parallel in low-voltage distribution systems with harmonic loads, and can quickly and real-time track and compensate for dynamically changing harmonic currents.

　　The ANAPF series active power filter collects harmonic currents through a CT acquisition system, quickly calculates and extracts the content of each harmonic current through a controller, generates harmonic current commands, generates compensation currents in the opposite direction to the amplitude of the harmonic current through power execution devices, and injects them into the power system to offset the harmonic currents generated by nonlinear loads.

　　ANSVC Low Voltage Reactive Power Compensation Device

　　The ANSVC low-voltage reactive power compensation device is suitable for automatic reactive power compensation in power grids with a frequency of 50Hz and a voltage of 0.4kV; It integrates reactive power compensation and power grid monitoring. It can not only compensate for reactive power losses in the power grid by switching capacitor banks, improve power factor, reduce line losses, but also enhance the load capacity and power supply quality of the power grid; At the same time, it can also monitor the three-phase voltage, current, power factor and other electrical parameters of the power grid in real time.

　　Discrete component solution

　　The discrete component capacitor compensation scheme consists of a power factor controller, low-voltage switching switch, series reactor, low-voltage power capacitor, etc. Based on the actual situation of the power grid, taking into account both the compensation effect and cost, choose a reasonable compensation form. Fully resolve the contradiction between compensating reactive power and three-phase imbalance, as well as between three-phase compensation and cost.

　　Intelligent capacitor solution

　　The AZC series intelligent capacitors are a new generation of reactive power compensation equipment for 0.4kV, 50Hz low-voltage distribution, which is efficient, energy-saving, reduces line loss, improves power factor and power quality. It consists of an intelligent measurement and control unit, a thyristor composite switch circuit, a line protection unit, and two (△ type) or one (Y-shaped) low-voltage power capacitors. By changing the bulky and cumbersome structural mode of traditional reactive power compensation devices, the new generation of low-voltage reactive power compensation equipment has the characteristics of better compensation effect, smaller size, lower power consumption, cheaper price, more cost savings, more flexible use, easier maintenance, longer service life, and higher reliability, adapting to the higher requirements of modern power grids for reactive power compensation.

　　ANSVG Static Reactive Power Generator

　　Static reactive power generator is a new type of power electronic device used to compensate for reactive power and imbalance. It can quickly and continuously compensate for varying reactive power and negative sequence. Its application can overcome the disadvantages of traditional reactive power compensators such as LC compensators, such as slow response speed, uncontrollable compensation effect, easy parallel resonance and switching oscillation with the power grid.

　　ANSVG-S-G Intelligent Dynamic Reactive Power Compensation Device

　　Intelligent dynamic reactive power compensation device is a new type of power electronic device used to compensate for reactive power, improve power factor, and achieve reactive power compensation effect; The intelligent control system actively adjusts the output of the module based on the linear dynamic requirements of the system; The ANSVG-S-G machine is mainly composed of the ANSVG-S-G module, intelligent controller, and LC module; Capable of compensating for larger capacity reactive power, the entire machine achieves human-machine interaction through a 7-inch touch screen. The touch screen communicates with the ANSVG-S-G module through RS485.

　　ANSVG-S-A series hybrid dynamic harmonic elimination compensation device

　　At present, based on the development of the industry and market demand, the ANSVG-S-A series hybrid dynamic harmonic elimination compensation device applies new technologies, combining the economic efficiency of SVC and the effectiveness of APF filtering, breaking through traditional reactive power compensation technology, and achieving harmonic control and reactive power compensation while effectively reducing costs.

　　The ANSVG-S-A series hybrid dynamic harmonic elimination compensation device is mainly used to compensate for reactive current, harmonic current, and unbalanced current in the power grid, in order to achieve the goals of improving power efficiency, energy conservation, and improving power quality.

　　ANSVG-G-A hybrid dynamic filtering compensation device

　　The hybrid dynamic filtering compensation device can not only compensate for reactive power but also manage system harmonics. The device is connected in parallel to the distribution system to monitor the current component of the system in real time. Through control calculations and logical changes, the required reactive and harmonic components of the system are calculated. Then, the power electronic converter generates the required reactive and harmonic currents in real time and injects them into the distribution system, achieving intelligent compensation and harmonic management.

　　Equipment selection

　　ANAPF harmonic filtering device selection Ankerui harmonic to the power supply system are as follows:

　　1) Harmonics cause additional harmonic loss to the components in the public power grid, which reduces the efficiency of power generation, transmission and electrical equipment. A large number of third-order harmonics over the neutral line will cause overheating and even fire.

　　2) Harmonics affect the normal work of various electrical equipment. The influence of harmonics on the motor not only causes additional loss, but also causes mechanical vibration, noise and overvoltage, which causes serious overheating of the transformer. Harmonic causes capacitors, cables and other equipment overheating, insulation aging and shortened life, so that the damage.

　　3) Harmonics will cause local parallel vibration and series resonance in the public power network, thus amplifying the harmonics, which greatly increases the harm of the above 1) and 2), and even cause serious accidents.

　　4) Harmonics will lead to misoperation of relay protection and automatic devices.

　　5) Harmonics will interfere with adjacent communication systems, and light ones will produce noise and reduce communication quality; Severe cases lead to letter opening, loss, so that the communication system can not work normally.

　　Active filtering and intelligent capacitive technology

　　The concept of active power filter has been put forward in the early 1970s, but due to the influence of the technical conditions at that time, the circuit structure that has been planned has not been implemented. Since the 1980s, there have been numerous articles on the technology and improvement of source filters.

　　With the rapid development of China's economy and science and technology, a large number of applications and popularity of medium and high power and low power electronic equipment, the stability and security of the power grid is increasingly high, but also gave birth to the harmonic control and power compensation and other related technical equipment more and more high requirements. Active power filter (APF) is widely studied and applied because of its strong control effect on current type harmonics and reactive power compensation. Active power filter (APF) has many disadvantages, such as high cost, low capacity and large loss, although it can effectively control the current wave and carry out controllable reactive power compensation. The use of capacitors in parallel compensating the reactive load of the power network has the advantages of less unit investment, large capacity, small power loss and simple maintenance. Therefore, the parallel APF and intelligent capacitor technology have the advantages of good harmonic control ability of APF and large compensation capacity of reactive power compensation capacitor.

　　At present, the company uses fre

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