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Jan 17,2020
Centralised compensation Centralised compensation by means of an automatic capacitor bank with automatic regulation offers the most simple and economical solution. The reactive power is subdivided in a number of capacitor steps that can be connected independently. A reactive power controller continuously measures the needs of the installation and connects or disconnects the capacitors until the ta...
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Jan 19,2020
A changing electrical network brings new power quality issues. Today the way we generate, use, and control our energy is changing. New and renewable generation and distribution technology is becoming common, and combined with more dynamic and complex load profiles, there are more challenges faced by the network and energy users to provide high power quality. A new way to improve your power quality...
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Feb 07,2020
Power Factor Correction The active power produced by the active current can alone be turned into an effective use for the consumer; while the reactive power produced by the reactive current does not yield usable power, and consequently, is not registered on the active performance meter. The reactive power has, however, a negative effect on generators, transformers, and conductor lines, while causi...
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Feb 12,2020
A capital investment in power factor correction(STATCOM or SVC) and harmonic filtering equipment can result in a healthy return of investment –depending on the utility’s demand rate structure, production quality cost due to harmonics and voltage fluctuations in the distribution system. ZDDQ Electric power quality correction products are part of the solution. Most utilities charge for peak electric...
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Feb 21,2020
Medium Voltage STATCOM-Dynamic Reactive Compensation -----Providing stability, security, and reliability to the grid Installing a STATCOM at one or more suitable points on the network is a powerful and cost effective method to increase grid transfercapability and enhance voltage stability. What is a STATCOM? A STATCOM (or Static Synchronous Compensator) is a voltage regulating device. It is based ...
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Feb 29,2020
The ubiquity of synchronous generation should not be assumed in highly renewable power systems. Various problems may consequently arise, not least of which are the difficulties entailed in maintaining regional reactive power balance. Offering a potential solution to such problems, modern renewable generator technologies offer controllable reactive power resources. As many of these generators will ...
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Mar 04,2020
STATCOM - Static Synchronous Compensator It is a solid-state switching converter, capable of generating or absorbing independently controllable real and reactive power at its output terminals when it is fed from an energy source. STATCOM is considered as voltage-source converter that, from a given input of dc voltage, produces a set of 3-phase ac-output voltages, each in phase with and coupled to ...
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Mar 11,2020
Product Description ZDDQ Medium Voltage Metal Enclosed Capacitor and Harmonic Filter Banks are designed for industrial, commercial, and utility power systems requiring medium voltage automatic power factor correction. Standard designs are available for placement in outdoor or indoor substations (an enclosure integrity option can be added to allow for placement in publicly accessible areas) for pow...
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Mar 28,2020
Power quality “Power quality” can seem to be a pretty abstract term – how does one judge the quality of such an unseen commodity as electricity? But, as commercial and industrial facility managers know, good power quality can boost both productivity and employee safety, while poor power quality can mean a drain on the bottom line, thanks to damaged equipment, lost productivity and product spoilage...
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Apr 03,2020
Power factor correction Connected equipment (transformers, motors, air-conditioning, refrigerators, etc.) cause a phase angle between current and voltage.When the current is phase-shifted, it takes more current to deliver the same amount of active power. Impact of reactive power • Transmission equipment has to be sized for the apparent power, yet only active power is useful • Increased losses in t...
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Apr 13,2020
Voltage Sag Voltage sag is the main problem to cause the losses of industrial production. Unpredictable outage rarely happen in many high automated process control industries. who have the good power supplies. Voltage Sag is mostly caused by thunder,but it also has other reasons. Power system cause: starting of heavy machine and short circuit fault. Unpredictable accident:traffic accident,construc...
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May 20,2020
STATCOM STATCOM (Static Synchronous Compensator)continuously provides variable reactive power in response to voltage variations, supporting the stability of the grid. STATCOM operates according to voltage source converter (VSC) principles, combining unique PWM (pulse width modulation) with millisecond switching. STATCOM functions with a very limited need for harmonic filters, contributing to a sma...
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May 26,2020
Power Factor: Power factor correction(Cosφ) Benefits of power factor correction Improves system power factor Reduces network losses Avoid penalty charges from utilities for excessive consumption of reactive power Reduces cost and generates higher revenue for the customer Increases system capacity and saves cost on new installations Improves voltage regulation in the network Increases power availab...
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Jun 19,2020
Global compensation Where a load is continuous and stable, global compensation can be applied Principle The capacitor bank is connected to the busbars of the main LV distribution board for the installation, and remains in service during the period of normal load. Advantages The global type of compensation: Reactive current still flows in all conductors of cables leaving (i.e. downstream of) the ma...
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Jun 29,2020
The nature of transformer inductive reactances All previous references have been to shunt connected devices such as those used in normal loads, and power factor correction capacitor banks etc. The reason for this is that shunt connected equipment requires (by far) the largest quantities of reactive energy in power systems; however, series-connected reactances, such as the inductive reactances of p...
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Jul 27,2020
Overview ZD-MCJB Medium voltage automatic power factor controller and protection Unit Our R&D has developed MV automatic power factor controller and protection unit since May 2019, and has intalled in many sites an d has a very good running. Now we introduce our MV auto PF controller and protection unit officially. ZD-MCJB PF controller and protection unit is suitable for automatically adjusti...
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Sep 15,2020
Leaders in Power Quality Solutions ZDDQ is one of leading manufacturers of power quality solutions from China. Here at ZDDQ we believe in creating and maintaining the highest quality power possible for our customers through an indepth understanding of power usage and electrical efficiencies. We source world’s best components to manufacture custom solutions to reduce maintenance and energy costs. N...
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Oct 21,2020
Our Indian Clients and African Clients has installed hybrid reactive power compensation system. After our guide, they use ZDDQ SVG mixed with Capapacitor banks based on Contactors and Thyristors. A united system of thyristor switched capacitor (TSC) and static var generator (SVG) was proposed to improve voltage regulation, stability, and power factor in ac transmission and distribution systems. Th...
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