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Sep 05,2024
Application of reactive power compensation device SVG: Power system: SVG can be used for reactive power compensation and voltage regulation of power system to improve the stability and reliability of power grid. It can help power system reduce power loss, improve voltage quality, and improve power factor and efficiency of power grid. Industrial field: SVG can be used for reactive power compensatio...
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Sep 11,2024
Selecting the capacity of the transformer is crucial, as it directly affects the stability, efficiency and safety of the power system. The appropriate transformer capacity can ensure that current and future load requirements are met, avoiding equipment damage and energy waste caused by overload or underload. The correct capacity selection helps optimize operating costs, extend equipment life, and ...
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Sep 24,2024
What is the reason of resonance in power networks? Resonance in power networks occurs when the inductive and capacitive elements of the system interact in a way that amplifies specific frequencies, leading to excessive voltage or current oscillations. Here are the primary reasons for resonance in power networks: 1. Impedance Matching Resonant Frequency: Every electrical circuit has a natural reson...
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Sep 28,2024
The low-voltage power distribution system consists of a distribution substation (usually reducing the transmission voltage of the power grid to the distribution voltage), a high-voltage distribution line (i.e., a voltage above 1 kV), a distribution transformer, a low-voltage distribution line (a voltage below 1 kV), and corresponding control and protection equipment. Generally includes: Main equip...
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Nov 04,2024
Inverters are a type of power electronic device widely used in industrial automation. They adjust the speed of motors by changing the frequency and amplitude of the motor input voltage. Although inverters improve energy efficiency and control performance, they generate harmonics during operation, which have an adverse effect on power grids and equipment. Understanding the causes and principles of ...
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Dec 17,2024
With the continuous advancement of science and technology, medical technology has been significantly improved, and advanced medical equipment continues to emerge, greatly improving the quality of medical services. However, the use of nonlinear devices in hospital power distribution systems may produce harmonic currents that can interfere with the normal operation of the system. The accumulation of...
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Dec 24,2024
Happy smiles are blooming, happy songs are being sung; Auspicious snowflakes are flying, melodious bells are floating; Christmas gifts are being delivered, and holiday blessings are being passed on. ZDDQ wishes everyone a Merry Christmas!
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Dec 25,2024
Power quality analysis and improvement measures for cement plants The size of system voltage deviation, the degree of three-phase voltage imbalance, and the reliability of power supply have an important impact on the safe operation and service life of electrical equipment, and are also directly related to the safety, stability and economic operation of the cement plant power system itself. 1. Powe...
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Feb 06,2025
Photovoltaic inverter harmonic control is an important technical issue in photovoltaic power generation systems, which is related to the stability of photovoltaic inverter operation and power generation efficiency. In photovoltaic power generation systems, inverters are one of the nonlinear electrical devices because their voltage-current characteristics do not conform to a linear relationship. Th...
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Mar 01,2025
I. Industry driving factors 1. Demand for new energy power generation and grid upgrades The volatility and intermittency of new energy power generation (such as wind power and photovoltaic power generation) put forward higher requirements for grid stability, and it is necessary to rely on power quality equipment (such as reactive power compensation and harmonic control) to achieve grid stability....
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Mar 05,2025
Benefits of harmonic control Improve power quality: Harmonics can distort voltage and current waveforms. Controlling harmonics can make voltage and current waveforms closer to sine waves, provide stable and high-quality power for various electrical equipment, ensure normal operation of equipment, and reduce equipment failures and malfunctions caused by power quality problems. Reduce equipment loss...
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May 08,2025
1. Overview of the development of the power quality optimization and management equipment industry Power quality refers to the nature and characteristics of the power provided to users by the power supply system, including voltage fluctuations, frequency stability, harmonic content, voltage flicker, power interruption and other aspects. Good power quality is the basis for ensuring the normal opera...
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May 26,2025
STATCOM (Static Synchronous Compensator) can help control harmonics, but its primary function is not harmonic filtering. Here's how it relates to harmonics: 1. Primary Role of STATCOM: Reactive Power Compensation: STATCOM provides fast and dynamic reactive power support to regulate voltage and improve power system stability. Voltage Stability: It helps maintain grid voltage by injecting or absorbi...
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Aug 19,2025
In the marine industry, active filters are primarily used to address harmonics, improve power quality, and ensure stable operation of shipboard power systems. Specific applications are as follows: 1. Suppressing Harmonics in Radar Systems: Shipborne radar equipment has large capacity and experiences significant load fluctuations during operation, generating significant harmonics. Total harmonic di...
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Aug 19,2025
When multiple modules of an active power filter are operated in parallel, slow response and reduced filtering effectiveness are often related to imbalances in core aspects such as inter-module coordinated control, signal synchronization, and current distribution. The specific causes can be analyzed from the following aspects: Ⅰ. Insufficient inter-module synchronization accuracy Multiple modules i...
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Sep 10,2025
1. Electrical Resonance What is Resonance? In an AC circuit, electrical resonance is a condition where the inductive reactance (X_C) become equal, canceling each other out. This leaves only the circuit resistance (X_L = 2πfL): Opposition from inductors (e.g., motors, transformers). Increases with frequency. Capacitive Reactance (f_r) This is the specific frequency where f_r = 1 / (2π√(LC)) Wh...
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Oct 21,2025
Established in 2001 and headquartered in Bengbu City, Anhui Province, ZDDQ(ANHUI ZHONGDIAN ELECTRIC CO.,LTD) is a leading integrated enterprise specializing in power quality and distribution solutions. Our modern manufacturing facility spans 25,000 square meters and employs nearly 200 professionals, with a specialized R&D team accounting for one-quarter of our workforce. Production & Capab...
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Oct 30,2025
Active Harmonic Filter is a high-power, fast-switching electronic amplifier. Its job is to continuously monitor the electrical system and instantly inject equal but opposite "anti-harmonic" currents to cancel out the distortions. This demanding process generates a significant amount of waste heat, and managing this heat is paramount for several key reasons: 1. To Protect the Power Semiconductors (...
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