Thyristor Controlled Capacitor is a type of equipment used for compensating reactive power in electrical power systems. It consists of a power capacitor connected in series with a bidirectional thyristor valve and, usually, a current limiting reactor (inductor). The thyristor switched capacitor is an important component of a Static VAR Compensator (SVC). Thyristor switched capacitor banks with high-speed switching capability are designed to support the supply voltage of distribution systems and to correct the power factor of connected loads. Features: > High performance > Perfect strength > Highly reliable MOQ 100 kvar
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Energy management systems (EMS) are automation systems that collect energy measurement data from the field and making it available to users through graphics, online monitoring tools, and energy quality analyzers, thus enabling the management of energy resources. The availability of information to employees in technical areas gives the company a competitive advantage since online and historical data are analyzed and converted into useful information to optimize the use of energy. The first step in implementing an energy management system is the determination of monitoring points. The installation of electric power metering systems allows the utility to monitor its entire network. The monitoring of the electric system operating conditions is therefore primary and essential. This is done by setting a data acquisition system, which uses measuring instruments distributed throughout the electric network, to collect and transmit data to the control center through a communication system.
The energy management system makes statistics and advanced analysis of the microgrid in real time on the basis of supervisory control and data acquisition (SCADA). In particular, advanced analysis includes automatic transfer between grid-connected mode and islanded mode, energy dispatch in islanded mode (to automatically maintain balance between generation and consumption), ES charge and discharge curve control, and power exchange control in an emergency (coordinated with the distribution network).
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Advanced power electronics equipment applications can improve our work efficiency and make life easier, but at the same time they can pollute the power grid. Rectifiers play a large part in many applications that are growing faster than power grid construction. Voltage and current harmonics, reactive power fluctuation, three phase imbalance, and other issues are caused by rectifiers with power quality issues that threaten the reliability and efficiency of the power supply system. Similarly, power voltage amplitude and frequency issues are affected by power generation.
We need to eliminate grid harmonics, reactive power fluctuations, imbalance, and other issues to adapt to new electronic equipment and power quality problems.
Special Features of Delta Power Quality Solution:
> Wider range of operating temperatures Delta PQC series APF & SVG can normally work without any derating from -10°C~ 50°C, which is suitable for most applications
> Withstands extreme electrical condition Delta’s PQC series APF & SVG can withstand severe harmonic distortion of voltage, they can work normally underconditions with THDu (total harmonic distortion of voltage) up to 15%
> Compatible with diesel generators
> The Delta PQC series APF & SVG’s modular structure makes it easy for installation, maintenance and capacity expansion.
APF & SVG modules can be embedded in Delta’s standard cabinets or third-party cabinets, making it possible to customize cabinets for special requirements.
> Delta’s PQC series APF & SVG applies 3-level inverter topology and up to 60 kHz switching frequency, which provide excellent power quality compensation accuracy, response speed and output ability.
> Module redundancy technology
> Intelligent air cooling technology
> Top brand electronic components
> Advanced production technology
The principle of the SVG is very similar to that of Active Power Filter, as demonstrated in the picture below. When the load is generating inductive or capacitive current, it makes load current lagging or leading the voltage. SVG detects the phase angle difference and generates leading or lagging current into the grid, making the phase angle of current almost the same as that of voltage on the transformer side, which means fundamental power factor is unit
