Is the frequency of equipment maintenance increasing? Does the power quality not meet the standard?

Active filtering device: a key force in safeguarding the power quality of agriculture and animal husbandry

In the process of continuous transformation of modern agricultural breeding industry towards scale and intelligence, the power system is like the "lifeline" of industry development, providing core power for the stable operation of various breeding equipment. However, with the increase in the number and complexity of breeding equipment, the issue of electricity quality has gradually become prominent, becoming an important factor restricting the efficient development of agricultural breeding industry. The Ankrui active filtering device (ANAPF), with its * * harmonic control capability, ensures the stable operation of agricultural and livestock distribution systems, becoming an ideal choice for solving industry power quality problems.

1、 The main problems with electricity quality in agricultural breeding industry

The production characteristics of agriculture and animal husbandry determine that their electricity quality has unique features.

Firstly, one of the significant characteristics is the high volatility of electricity load. During the breeding process, there are significant differences in the operational requirements of equipment at different times, such as during the day when feeding, ventilation, lighting, and other equipment operate in a centralized manner, resulting in peak electricity loads; At night, some equipment enters a low load operation state, causing frequent load fluctuations, which undoubtedly affects the voltage stability of the distribution system.

Secondly, the proportion of nonlinear loads gradually increases. With the popularization of intelligent breeding equipment, a large number of nonlinear loads such as fans, water pumps, temperature control equipment, and feed processing equipment are widely used. These devices inject a large amount of harmonics into the power grid during operation, damaging the sine waveform of electrical energy and reducing power quality.

In addition, there are requirements for the reliability of power supplyvery highThe production process of agriculture and animal husbandry has continuity, especially in livestock and poultry breeding. The stability of environmental parameters such as temperature, humidity, and ventilation is directly related to the growth and health of livestock and poultry. Once there is a problem with power supply or poor power quality leading to equipment failure, it may cause huge economic losses.

2、 Harmonic sources and characteristics of agricultural and livestock distribution systems

01

Generation of harmonics

Firstly, ventilation equipment is one of the main harmonic sources, such as axial flow fans and centrifugal fans widely used in aquaculture farms. These fans usually use variable frequency speed regulation technology to adjust the air volume to meet the needs of different breeding environments. The frequency converter generates a large number of high-order harmonics during operation, mainly concentrated in the 3rd, 5th, 7th, etc. These harmonics will distort the voltage and current of the power grid, affecting the normal operation of other equipment.

Secondly, water pump equipment can also generate harmonics. Water supply systems, sewage treatment systems, etc. in aquaculture farms cannot do without water pumps. Some water pumps also use variable frequency drive to achieve precise flow control, which can also become an important source of harmonics.

Furthermore, feed processing equipment such as crushers, mixers, etc. belong to inductive loads, and during start-up and operation, there will be significant fluctuations in current, as well as the generation of certain harmonics.

In addition, temperature control equipment such as electric heating tubes, air conditioners, etc. may also generate harmonics during operation, especially at the moment of equipment start stop, which can easily cause fluctuations in grid voltage and harmonic pollution.

02

Characteristics and hazards of harmonics

The harmonics in the distribution system of agriculture and animal husbandry have the characteristics of wide distribution range, high harmonic frequency, and deep impact. Due to the large size of aquaculture areas, various devices that generate harmonics are scattered in different areas, resulting in a wide distribution of harmonics in the power distribution system and making it difficult to control.

At the same time, different types of equipment generate different harmonic frequencies, and the superposition of multiple harmonics can pose a serious threat to the stability and safety of the distribution system. In addition, harmonics not only affect the normal operation of equipment, shorten its service life, but also increase energy loss, raise breeding costs, and have adverse effects on the economic benefits of agricultural breeding.

Benefits of Active Power Filter Products

● Ensure that the harmonic index meets national standards and avoid fines or power interruptions by the power supply department;

Reduce transformer losses;

Reduce harmonic pollution, minimize the interference of harmonics on automatic control devices, energy metering devices, and relay protection devices, and ensure the safe and stable operation of the power supply and distribution system;

● Avoid the harm of harmonic overvoltage and harmonic overcurrent to electrical equipment, and extend the service life of equipment;

Energy saving and consumption reducing, improving power factor, saving electricity costs, and avoiding fines.

3、 Introduction to Ankrui Active Power Filter Products

01

working principle

The Ankerui 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 principle is that the ANAPF series active power filter collects harmonic currents from the CT acquisition system, quickly calculates and extracts the content of each harmonic current through the controller, generates harmonic current commands, and generates compensation currents in the opposite direction of the harmonic current amplitude through the power execution device, which are injected into the power system to offset the harmonic currents generated by nonlinear loads.

Figure 2-1 Schematic diagram of ANAPF active power filter

02

Product Features

DSP+FPGA fully digital control mode, with extremely fast response time, advanced main circuit topology and control algorithms, higher accuracy, and more stable operation;

One machine has multiple functions, which can compensate for both harmonics and reactive power. It can fully compensate for 2-31st harmonics or specify specific harmonics for compensation;

● Equipped with comprehensive bridge arm overcurrent protection, DC overvoltage protection, and device over temperature protection functions;

Modular design, small size, easy installation, and convenient expansion;

Adopting a 7-inch large screen color touch screen for parameter setting and control, it is easy to use, operate and maintain;

Install filtering devices at the output end to reduce the impact of high-frequency ripple on the power system;

Multiple machines are connected in parallel to achieve a high level of current output;

● Possess technology.

03

Main technical parameters

Table 2-1 Technical Parameters of ANAPF Active Power Filter

2.4 Product Model and Description

4、 Application Cases

01

Project Background:

A certain group, as a domestic * * agricultural industrialization**The enterprise has a large-scale pig farm with complete breeding equipment. With the continuous expansion of the breeding business, a large number of fan equipment have been added to various breeding areas of the pig farm to meet the ventilation needs during the growth process of livestock and poultry. However, after the fan was put into use, the problem gradually became apparent: the fan frequently experienced abnormal operation, manifested as sudden self starting and stopping during operation or sudden stopping during normal operation. After each malfunction, the staff needed to power off the fan before it could be restarted.

02

Existing issues:

The operation of the wind turbine generates a large number of 3rd, 5th, and 7th harmonics, causing voltage and current distortion in the power grid and interfering with the wind turbine control system, leading to faults. This problem not only seriously affects the normal ventilation environment of pig farms and poses a potential threat to the growth of livestock and poultry, but also increases the labor intensity of staff due to frequent equipment failures. At the same time, it also causes certain damage to the service life of fan equipment, which brings great troubles to pig farms.

03

governance solution

In response to the on-site situation, an on-site treatment plan was adopted by installing 70A and 100A active filters with models ANAPF70-380/BBL and ANAPF100-380/BBL at each incoming line of the main distribution box. All modules were wall mounted to address the harmonic currents generated by these end devices and reduce the distortion rate of voltage and current in the distribution system, ensuring safe and reliable operation of the equipment.

Technical principle: Based on the theory of instantaneous reactive power, detect load current, separate harmonic components, and generate reverse compensation current to offset harmonics.

Equipment configuration: Configure corresponding capacity equipment and reserve expansion space according to the fan power and distribution situation in each region.

Implementation service: A professional team is responsible for installation and debugging, and provides personnel training.

Governance effect: After governance, wind turbine failures are resolved, power factor is improved, energy loss is reduced, and breeding costs are reduced.

The problem of abnormal start stop of fans in pig farms has been solved through the application of Ankerui ANAPF active filters. The fan equipment can operate stably and reliably, ensuring the normal operation of the ventilation system in pig farms and creating a good growth environment for livestock and poultry. At the same time, after effective control of harmonics, the power factor of the distribution system has been significantly improved, the energy loss has been significantly reduced, the electricity cost of pig farms has been effectively reduced, and the economic benefits of enterprises have been improved.

5、 Application of active filters in other industries

Urban rail transit has a large number of fluorescent lamps, UPS power supplies, frequency converters, and soft start devices, all of which generate a large amount of harmonics, causing sinusoidal distortion in the power system and reducing power quality. Comprehensive treatment of harmonics provides assurance for traffic safety and smoothness.

Similar industry cases: Shandong Rizhao Airport, Nansha Sansha Airport, Jilin Station West Square Transportation Hub, etc.

The hospital industry mainly relies on equipment such as nuclear magnetic resonance machines and CT machines, which generate a large amount of harmonics. A large number of advanced medical equipment have very high requirements for the harmonic quality of the power supply. If not treated properly, it is likely to cause large errors in detection data, interference between equipment, and malfunction, resulting in serious medical accidents. After harmonic control, the potential electrical hazards have been reduced. Similar industry cases: Shaanxi Yulin First People's Hospital, Shanghai Second Rehabilitation Hospital, Chuzhou Second People's Hospital, Anhui Lu'an Sixth People's Hospital, etc.

Electric arc furnaces, heating furnaces, rolling mills, and other loads are widely used in the metallurgical industry. These loads not only have large capacities, but most of them are inductive loads. Without the use of reactive power compensation devices, the power factor is extremely low and a large amount of distorted harmonics are generated, seriously endangering the safe operation of the power system and the safe and economical operation of electrical equipment.

Similar industry cases: Jiangsu Binxin Special Steel Materials Co., Ltd., Yudong Energy Chemical Base, etc.

Places such as sports arenas and broadcasting centers mainly generate harmonics from a large number of stage lighting, LED screens, high pole lights, and other equipment. Timely harmonic control can ensure the effectiveness of the equipment itself and provide assurance for electricity consumption, which can lead to a deterioration in power quality.

Similar industry cases: Suzhou Dantaihu Conference Center, Guangzhou Cultural Palace, Wuhan Education Television Studio, Yueyang Olympic Sports Center and Swimming Pool, etc.