Overview
The high-voltage parallel capacitor compensation device series is an outdoor automatic reactive power compensation device widely used in lines. It can monitor the voltage, current, reactive power and power factor of high-voltage lines in real time. Parameters, and dynamic monitoring and compensation of high-voltage power grids based on these parameters play an important role in improving line power factor and voltage, reducing line losses, and improving power supply quality of the power grid.
2.
Implementation Standards
/"Technical Conditions for Ordering High Voltage Parallel Capacitor Devices"
"High Voltage Parallel Capacitors"
/"Pole-mounted High Voltage Reactive Power Compensation Device"
"Design Specification for Parallel Capacitor Devices"
/High Voltage Testing Technology Part 1 General Test Requirements"
/High Voltage Testing Technology Part 1 Measurement System"
"Voltage Transformer》
"Current Transformer"
"AC Gapless Zinc Oxide Arrester"
"High Voltage AC Circuit Breaker"
"Protection Level"
/ "Substation Voltage Reactive power adjustment control device ordering technical conditions》
Product parameter description
Product main technical indicators
Main technical principles
Mainly composed of AC vacuum contactor, fully sealed high-voltage parallel capacitor, high-voltage control It is composed of transformer, wireless current transformer (or outdoor pole-mounted current transformer), voltage transformer, lightning arrester, connecting bus, etc. The current signal is measured using an outdoor pole-mounted current transformer or a wireless current transformer.
The voltage transformer type is connected before the vacuum switch to measure the voltage of the busbar and calculate the reactive power through the voltage and current. Send and receive current signals wirelessly or outdoor current to high voltage reactive power controller as current sampling.
The principle of automatic switching measures the bus voltage and current on the power supply side, calculates the reactive power of the network, and automatically switches based on the comparison between the reactive power and the capacitor set threshold. When it is greater than the input threshold, after a set delay , when the device is put into operation and is greater than the cut-off threshold, (the capacitor is put into over-compensated capacity, the power factor should be negative at this time) after the set delay, the device exits operation. According to the actual operating parameters of the busbar, the setting values of and should be appropriately changed to obtain the best economic benefits and ensure that the device does not have switching oscillations. A discharge resistor should be installed in the capacitor of the device.
Main technical features
) The current measuring transformer uses an open-type current transformer that is easy to install and has reliable quality, which improves the installation quality and reduces labor intensity.
) Measurement accuracy voltage error, current error, reactive power, active power error, power factor.
) It has overcurrent, overvoltage, undervoltage, and phase loss protection functions. After the compensation device is disconnected from the power grid, the internal discharge component automatically reduces the residual voltage to the following
) It can realize multi-level automatic switching Switching control function makes the reactive power compensation curve of high-voltage lines smoother and more effective.
) Uses highly reliable microprocessor and control technology to realize the functions of automatic control, data statistics and storage of the compensation system.
) The purpose of long-distance data collection and control is achieved through remote wireless communication.
) Vacuum contactor is used to switch capacitors, which is suitable for switching capacitive current and has high reliability.
Main technical parameters
Power frequency main circuit withstand voltage test/
Secondary circuit withstand voltage test
Lightning impulse withstand voltage test (peak value)
Vacuum contactor pull-in Voltage
Vacuum contactor closing synchronicity is less than or equal to
Vacuum contactor life span 10,000 times
Controller parameters
Working voltage AC power consumption
Communication interface,
Rated voltage,
Rated capacity of pole-mounted reactive power compensation device,,, ,,,,.
The working voltage in the control cabinet~.
Control mode voltage, reactive power, time period.
Usage renderings
High-voltage reactive power compensation device
Comparison of product advantages and disadvantages
The device operates at the rated voltage for a long time.
The root mean square value does not exceed the current produced by the device when operated continuously at rated frequency, rated sinusoidal voltage and without transition conditions.
Over-current, over-voltage, under-voltage and other protections should be provided for faults in the alignment system
In addition to a single fuse for internal faults in the alignment capacitor, different protection devices should be installed according to the main wiring type. relay protection.