ZDDQ solutions for stable and efficient processes in the chemical industry. The chemical industry is characterized both by its diversity as well as by a high degree of energy intensity. The highly powerful rectifiers used in chemical plants can endanger the quality and stability of the supply grid as well as of the plant’s own production processes. For this reason, solutions to improve the voltage quality and reactive power compensation are vital in order to ensure process stability and efficient production. Often, the use of filter-circuit systems for harmonics and single-level or multi-level reactive power compensation systems is necessary. ZDDQ offers solutions to these problems through a variety of products from its comprehensive product range. Our products help ensure both long-term production security as well as compliance with all grid-connection requirements. OUR RECOMMENDED PQ PRODUCTS FOR THE PRIMARY-ELEMENTS INDUSTRY 0.4kv Capacitor banks 6kv~35kv Capacitor banks 0.4Kv Static var generator 6~35kv statcom Active Harmonic Filter Are you sure that your production facilities are sufficiently protected against disruptions? We are happy to carry out a comprehensive grid analysis with you in order to proactively identify any possible problems. Naturally, should you have any questions, feel free to contact us at any time. Our typical project Industry background Oil extraction and production facilities on offshore platforms face high temperatures, high pressures, high flammability, and high volatility, which demands a highly reliable, continuous, safe, and high-quality power supply. Offshore platforms require ongoing operations and power system failure for a few cycles can shut down a large amount of production equipment and cause catastrophic consequences, including unplanned shutdowns, industrial safety accidents, and pollution. Due to production needs, offshore oil platforms use a large number of pumps, and most pumps are equipped with VFDs. The use of many VFDs results in a significant increase of harmonic current in the distribution systems of offshore platforms. Six-pulse rectification is often used in the rectifier of VFDs to convert alternate current into direct current, which generally produce harmonics of the 5th, 7th, and 11th orders. Besides reducing the work efficiency of equipment, this type of harmonic load causes voltage distortion in circuit impedance and accumulates which weakens the entire grid and threatens distribution stability and all electricity loads. Customer Victory Oil manfufacture, which is the largest offshore oil & gas producer in SHD province Power quality problem description In general, VFDs are equipped with passive filters of LC circuits. When absorbing harmonics, the inductor-capacitor network also inputs a large volume of capacitive reactive power into the grid causing leading phase operation in the generators. High impedance is supported on the offshore platform’s generator to compensate for the capacit...

ZDDQ solutions for efficient and reliable operation of electrical systems under extreme conditions . Whether it comes to extraction, processing or transport, all of the processes concerning crude oil and natural gas are subject to the strictest standards in terms of operational safety, and necessitate a reliable, interference-free power supply. At the same time, at many locations both onshore and offshore, extreme environmental conditions are not uncommon. The Maschinenfabrik Reinhausen product range offers a variety of system solutions in order to ensure reliable, efficient and interruption-free operation under these difficult conditions. For example, MR provides reactive power compensation systems to improve the displacement factor cos phi, filter circuits for harmonics reduction, equipment for balancing non-symmetrical loads, dynamic compensation systems for voltage stabilization, and equipment for preventing transient voltage drops. Based on nearly 20 years of experience, ZDDQ already supports its customers during the planning phase of a new system, through tasks such as measurements and grid analyses. OUR RECOMMENDED PQ PRODUCTS FOR THE PRIMARY-ELEMENTS INDUSTRY 0.4kv Capacitor banks 6kv~35kv Capacitor banks 0.4Kv Static var generator 6~35kv statcom Active Harmonic Filter Are you sure that your production facilities are sufficiently protected against disruptions? We are happy to carry out a comprehensive grid analysis with you in order to proactively identify any possible problems. Naturally, should you have any questions, feel free to contact us at any time. Our typical projects Industry background Oil extraction and production facilities on offshore platforms face high temperatures, high pressures, high flammability, and high volatility, which demands a highly reliable, continuous, safe, and high-quality power supply. Offshore platforms require ongoing operations and power system failure for a few cycles can shut down a large amount of production equipment and cause catastrophic consequences, including unplanned shutdowns, industrial safety accidents, and pollution. Due to production needs, offshore oil platforms use a large number of pumps, and most pumps are equipped with VFDs. The use of many VFDs results in a significant increase of harmonic current in the distribution systems of offshore platforms. Six-pulse rectification is often used in the rectifier of VFDs to convert alternate current into direct current, which generally produce harmonics of the 5th, 7th, and 11th orders. Besides reducing the work efficiency of equipment, this type of harmonic load causes voltage distortion in circuit impedance and accumulates which weakens the entire grid and threatens distribution stability and all electricity loads. Customer Victory Oil manfufacture, which is the largest offshore oil & gas producer in SHD province Power quality problem description In general, VFDs are equipped with passive filters of LC circuits. When absorbing harmonics, t...

ZDDQ solutions for efficient mine operation. The continuously growing demand for primary raw materials (e.g. copper, gold, zinc, coal) is necessitating the development and operation of ever larger and more remote mines. In order to ensure more efficient, cost-optimized operation, power-electronic drives, some of which have capacities of more than 25 MW per drive unit, are being used more frequently. These modern assemblies pose a particularly difficult challenge for electrical grids because they can result in harmonics, voltage drops or a poor power factor. For nearly 20 years, ZDDQ has offered product solutions that are tailored to customers' needs and reliably ensure safe, error-free operation of mines over the long term. OUR RECOMMENDED PQ PRODUCTS FOR THE PRIMARY-ELEMENTS INDUSTRY 0.4kv Capacitor banks 6kv~35kv Capacitor banks 0.4Kv Static var generator 6~35kv statcom Active Harmonic Filter Are you sure that your production facilities are sufficiently protected against disruptions? We are happy to carry out a comprehensive grid analysis with you in order to proactively identify any possible problems. Naturally, should you have any questions, feel free to contact us at any time.

ZDDQ solutions for grid conformity and the efficiency of wind and PV farms. Grid operators place similar requirements on wind turbines and PV farms at the grid connection point as they do on conventional power plants. This means that, among other things, inductive or capacitive reactive power must be available, and the static voltage must be controlled. Depending on the type of system used and the electrical grid topology of the wind or PV farm, the wind turbines alone are often unable to meet all of these requirements. For this reason, with the ZDDQ products, We offer a solution both for individual wind turbines and for entire grid segments. Naturally, in order to provide the necessary system services while also providing solutions that are ideally tailored to your needs, our experts determine the precise requirements of your system on location in advance. OUR RECOMMENDED PQ PRODUCTS FOR THE PRIMARY-ELEMENTS INDUSTRY 0.4kv Capacitor banks 6kv~35kv Capacitor banks 0.4Kv Static var generator 6~35kv statcom Active Harmonic Filter Are you sure that your production facilities are sufficiently protected against disruptions? We are happy to carry out a comprehensive grid analysis with you in order to proactively identify any possible problems. Naturally, should you have any questions, feel free to contact us at any time.

ZDDQ solutions for stable, efficient production in the metalworking industry. The provision of an environmentally friendly water supply is one of the greatest challenges of the 21st century. In order to achieve the greatest degree of energy efficiency possible, power generation plants (e.g. solar power plants) are increasingly being integrated into modern treatment facilities, including frequency converters, in order to operate the electrical pumps with the power generated. However, these pumps can cause disruptive electric harmonics that make the use of active filters a necessity. Furthermore, many countries have complex regulations in place to ensure that power generation plants are properly connected to the power grid, and these regulations pose additional challenges. With innovative products, ZDDQ offers its customers a wide range of possible solutions to address the challenges described above. OUR RECOMMENDED PQ PRODUCTS FOR THE PRIMARY-ELEMENTS INDUSTRY 0.4kv Capacitor banks 6kv~35kv Capacitor banks 0.4Kv Static var generator 6~35kv statcom Active Harmonic Filter Are you sure that your production facilities are sufficiently protected against disruptions? We are happy to carry out a comprehensive grid analysis with you in order to proactively identify any possible problems. Naturally, should you have any questions, feel free to contact us at any time. Our typical Project Industry background Dynamic reactive power, low power factors, and high harmonic content are common power quality problems in the metallurgical industry. Major contamination sources of power quality include the arc furnace, induction melting furnace, rolling mill, and electroplating, which contains rectification loads. The operation of an arc furnace is complex. During smelting and refining periods, harmonic current is irregular. When harmonics occur, dynamic reactive current and 3-phase imbalance are produced. The 3-phase arc furnace is commonly used in steel smelting and the single-phase arc furnace is often used in copper and copper alloy smelting. During the smelting period, the power factor of arc furnace is below 0.7, and even drops to 0.1 after a short circuit. During the refining period, the power factor is only 0.8. Voltage fluctuates as reactive power is dynamic, and this can have a great impact on the grid and influence the normal operation of other loads. Customer Shandong Aluminium Factory Group (SAF), the largest AL product manufacturer in SD province. Power quality problem description SAF uses non-linear dynamic loads, such as arc furnaces and electroplating, extensively during copper smelting, and major problems include: 1.      The dynamic harmonic and reactive currents that cause grid voltage to fluctuate. 2.      Frequent failure of capacitor banks and reactive penalties from the power distributor due to low PF. 3.      Voltage distortion that exceeds national standards due to ...

ZDDQ solutions for efficient and safe processes in the water-management industry. The provision of an environmentally friendly water supply is one of the greatest challenges of the 21st century. In order to achieve the greatest degree of energy efficiency possible, power generation plants (e.g. solar power plants) are increasingly being integrated into modern treatment facilities, including frequency converters, in order to operate the electrical pumps with the power generated. However, these pumps can cause disruptive electric harmonics that make the use of active filters a necessity. Furthermore, many countries have complex regulations in place to ensure that power generation plants are properly connected to the power grid, and these regulations pose additional challenges. With innovative products, ZDDQ offers its customers a wide range of possible solutions to address the challenges described above. OUR RECOMMENDED PQ PRODUCTS FOR THE PRIMARY-ELEMENTS INDUSTRY 0.4kv Capacitor banks 6kv~35kv Capacitor banks 0.4Kv Static var generator 6~35kv statcom Active Harmonic Filter Are you sure that your production facilities are sufficiently protected against disruptions? We are happy to carry out a comprehensive grid analysis with you in order to proactively identify any possible problems. Naturally, should you have any questions, feel free to contact us at any time.

ZDDQ solutions for standard-compliant and efficient operation of electrical grids. At the moment, in the world of electricity supply, a shift is taking place towards a dispersed, and at times remote, power supply based on a volatile feed-in of renewable energies. For this reason, reactive power is becoming increasingly important for the operation of supply grids, which are currently still being provided by large, spatially dispersed power plants that are connected to the extra-high voltage transmission grid. Because homogeneous spatial distribution is declining together with the noted shift in electricity supply, depending on the topology of the supply grid, the use of local, inductive or capacitive reactive-power compensation systems on high- and medium-voltage grids is necessary both technically and in terms of cost. ZDDQ offers corresponding system solutions, tailored to customers' needs, for the provision and generation of reactive power in high-voltage and medium-voltage grids in order to allow for the future-oriented integration of dispersed renewable energies. OUR RECOMMENDED PQ PRODUCTS FOR THE PRIMARY-ELEMENTS INDUSTRY 0.4kv Capacitor banks 6kv~35kv Capacitor banks 0.4Kv Static var generator 6~35kv statcom Active Harmonic Filter Are you sure that your production facilities are sufficiently protected against disruptions? We are happy to carry out a comprehensive grid analysis with you in order to proactively identify any possible problems. Naturally, should you have any questions, feel free to contact us at any time.

ZDDQ solutions for clean, inexpensive electricity for rural and remote regions. Even today, in many parts of the world the electricity supply is still limited or only available with the help of diesel generators. Renewable energies and modern power electronics are opening up new possibilities for ensuring an economic energy supply. The most well-known alternatives to conventional power generation are solar power plants and wind farms that, in connection with an energy accumulator, are significantly more environmentally friendly and require no fuel costs or can at least markedly reduce fuel costs when used in combination with a diesel generator. The use of energy accumulators is not limited to batteries. For example, electrolysis plants can use solar and wind energy to turn water (and carbon dioxide) into hydrogen (or natural gas). The gas generated in this process can be easily stored and used for a variety of applications, such as vehicles or combined heat and power plants. Regardless of whether or not they are connected to an integrated grid, the grids required for self-sufficient power supplies are referred to as microgrids. Modern power electronics from ZDDQ provide the required connections and make it possible to operate these microgrids without the use of a generator. OUR RECOMMENDED PQ PRODUCTS FOR THE PRIMARY-ELEMENTS INDUSTRY 0.4kv Capacitor banks 6kv~35kv Capacitor banks 0.4Kv Static var generator 6~35kv statcom Active Harmonic Filter Are you sure that your production facilities are sufficiently protected against disruptions? We are happy to carry out a comprehensive grid analysis with you in order to proactively identify any possible problems. Naturally, should you have any questions, feel free to contact us at any time.

ZDDQ solutions for reliable and precise operation of crane and conveyor systems. The use of container cranes or shaft hoisting systems for transporting heavy loads necessitates the use of electrical drive technology with powerful motors. In order to precisely and reliably meet the strict requirements of the lifting or conveyor system, power-electronic drive controllers are used for variable torque and speed regulation. Depending on the output and design of the power electronics, a variety of system perturbations can occur that can even trigger malfunctions in neighboring power grids. The most frequent problems in this regard are dynamic reactive power loads, which can cause voltage drops or flicker, as well as harmonic currents or commutation losses. With individual system solutions tailored to the needs of the customer, ZDDQ is able to eliminate system perturbations, thus ensuring high voltage quality and continuous availability of the crane and conveyor systems. OUR RECOMMENDED PQ PRODUCTS FOR THE PRIMARY-ELEMENTS INDUSTRY 0.4kv Capacitor banks 6kv~35kv Capacitor banks 0.4Kv Static var generator 6~35kv statcom Active Harmonic Filter Are you sure that your production facilities are sufficiently protected against disruptions? We are happy to carry out a comprehensive grid analysis with you in order to proactively identify any possible problems. Naturally, should you have any questions, feel free to contact us at any time.

ZDDQ solutions for a high degree of efficiency and availability in production facilities. In the primary-elements industry, primary raw materials such as timber, agricultural products, coal, ores, metals and minerals are processed to create the basic materials for industrial production. The energy-intensive machinery required for these processes, such as grinding mills, centrifuges or compactors, are equipped with modern, large-scale drives that are controlled by power-electronic drive controllers. The reactive power connection and the harmonic currents and commutation losses caused by the power electronics can negatively impact both the energy efficiency and the voltage quality. The large number of frequency converters also poses further problems for small or medium-sized electric drives in the production processes, such as in the food processing industry. With customer-specific system solutions for reactive-power compensation and eliminating system perturbations that disrupt the supply voltage, ZDDQ is able to ensure both energy efficiency and the availability of the production facilities. OUR RECOMMENDED PQ PRODUCTS FOR THE PRIMARY-ELEMENTS INDUSTRY 0.4kv Capacitor banks 6kv~35kv Capacitor banks 0.4Kv Static var generator 6~35kv statcom Active Harmonic Filter Are you sure that your production facilities are sufficiently protected against disruptions? We are happy to carry out a comprehensive grid analysis with you in order to proactively identify any possible problems. Naturally, should you have any questions, feel free to contact us at any time.

ZDDQ PQS Active Harmonic Filter solutions for efficient and reliable operation in hospitals or data centres. Harmonics condition and requirement in Hospitals and data centres Hospitals Hospitals are places where reliable power distribution is needed to guarantee patient health,save lives. Continuity and reliability of power supply are extremely important. Automatic power restoration time of different healthcare venues is as follows: category 0 venues t≤15s; category 1 venues 0.5s≤t≤15s; and category 2 venues t≤0.5s. The use of new moden electrical devices, such as CT scanners, MRI scanners, X-ray machines, and others is increasing in hospitals. Device loads contain massive harmonic current, and can impact the hospital power networks,thereby reducing power quality. Harmonic mitigation and management is necessary to ensure the safety of hospital distribution systems. Data Centres Data Centres are places where reliable power supply is necessary to guarantee the stability of datas.Continuity and reliability of power supply with lower harmonics are extremely important. UPSs are increasingly common as data centres pursue a reliable power supply. As most UPSs use 6-pulse or 12-pulse rectifiers, a high volume of harmonic current can flow into the grid and affect grid stability. Power quality problem description in hospitals Harmonics affect lighting stability and interfere with precision medical instruments such as CT scanners, MRI scanners and ECGs, reducing examination accuracy and ultimately affecting physician diagnoses of patients’ conditions. In addition, massive harmonic current also reduce the stability of hospital distribution systems, which result in power outages due to tripping and the necessity of harmonic elimination. Solution Referring to onsite inspection, pilot testing and assessment, an Acitve Harmonic Filter is installed at the secondary site of the LV distribution transformer. Conclusions After implementing an Active Harmonic Filter in a large hospital, the lighting system became stable, there were reduced reports of extreme noise interference on instruments, machine stability was enhanced, failure and maintenance frequency was reduced, and harmonic impact on the stability and safety of the hospital distribution system were eradicated. ZDDQ Recommened PQ products for Hospitals and data centres Active Power Filter Active Harmonic Filter Static Var Generator Advanced static var generator

ZDDQ solutions for reliable processes in automotive manufacturing. In the automotive industry, production reliability is a top priority. Power electronics are a mandatory prerequisite when it comes to ensuring this reliability; however, as a source of system perturbations, they also represent a significant malfunction risk. For this reason, in order to ensure a smooth production process, the use of powerful harmonic filters should be taken into account during the planning and development phases of new plants. ZDDQ has many years of experience in this area and with APF series of active filters, is already represented in countless plants operated by leading automotive manufacturers. OUR RECOMMENDED PQ PRODUCTS FOR THE PRIMARY-ELEMENTS INDUSTRY 0.4kv Capacitor banks 6kv~35kv Capacitor banks 0.4Kv Static var generator 6~35kv statcom Active Harmonic Filter Are you sure that your production facilities are sufficiently protected against disruptions? We are happy to carry out a comprehensive grid analysis with you in order to proactively identify any possible problems. Naturally, should you have any questions, feel free to contact us at any time.