Electrical Power Quality Integrated Optimization Device MEC

NME series distribution network power quality integrated optimization device MEC(Multipower Power Control &;; Optimizer) products have been tested by the National Electrical Control and Distribution Equipment Quality Supervision and Inspection Center, which can quickly compensate reactive power, filter out harmonics, filter rate of more than 80 %, and have strong ability to suppress voltage fluctuations and flash. It can effectively compensate for voltage drops with a depth of 20 % and a width of 100 MS, and can effectively suppress three-phase imbalance, superior reliability and stability, and a response time of less than 3 MS, which can solve the defects of traditional shunt capacitor compensation. It can meet the requirement of power distribution quality improvement and energy saving application.

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Comparison table of MEC to traditional switch capacitor

Product	Multifunctional electricity controller & optimizer （MEC）	Mechanical switch capacitor （MSC）	Thyristor-switched capacitor （TSC）
Response speed	≤2ms	300ms	20ms
Reactive power compensation ability	Rated capacitive reactive power to rated inductive reactive power, 0.1kVar precision, and up to 1 power factor	0 to rated capacitive reactive power, stair-like adjustment, transient and possible over-compensation and under-compensation, with the average power factor up to standard	0 to rated capacitive reactive power, stair-like adjustment, transient and easy for over-compensation and under-compensation, with the average power factor up to standard
Harmonic control ability	Filter out harmonics for 2-13 times, filtering rate over 80%, no resonance oscillation risks	No harmonic-filtering ability, large harmonics amplification and resonance risks	No harmonic-filtering ability, large harmonics amplification and resonance risks
Three-phase imbalance contro	Strong, adjustable three-phase active power	None	None
Voltage stabilization ability	Strong, output capacity not change along with the drop of voltage, fast response to voltage leap	Worse, the output capacity decreases by squares when the voltage decreases, resulting in system voltage fluctuation during switching	Worse, the output capacity decreases by squares when the voltage decreases, resulting in system voltage fluctuation during switching
Anti-electricity dazzling ability	Possess the ability of preventing electricity dazzling from +10% to -50%	None	None
Reliability	Without capacitance wearing parts, and failure-free operating time of 100,000 hours	With the switch-on rush current, over-voltage and resonance phenomena, the contactor is vulnerable to contact welding, and the capacitor is vulnerable to damages due to harmonics, with a high fault rate	With the switch-on rush current, over-voltage and resonance phenomena, and the capacitor is vulnerable to damages due to harmonics, with a high fault rate
Service life	Design life over 20 years	Capacitance attenuation, service life of 2-3 years	Capacitance attenuation, service life of 2-3 years
Maintenance cost	Low, maintenance-free	High, the capacitor should be replaced annually at later stage	High, the capacitor should be replaced annually at later stage
Impacts on the service life of transformer	Power compensation, harmonic filtering, adjustment of three-phase balance, reducing the load rate and temperature rise of transformer, and increasing the service life of transformer by 50%	Only compensating the reactive power, and impossible for eliminating the major damages on transformer caused by harmonics and three-phase imbalance, resulting in high load rate and short service life of transformer. The transformer may be burnt up due to resonance	Only compensating the reactive power, and impossible for eliminating the major damages on transformer caused by harmonics and three-phase imbalance, resulting in high load rate and short service life of transformer. The transformer may be burnt up due to resonance
Remote monitoring	With the Bluetooth+GPRS monitoring function, available for networking remote management	None	None

?Features		?Application fields
1. 200V, 400V, 600V, and 750V, and unit capacity up to 10Mvar; 2. Simultaneous compensation of reactive power, harmonic, three-phase imbalance, electricity-dazzling; 3. Modular parallel design, the module failure imposes no impacts on the operation of other modules, available for live replacement what gives high reliability; 4. Integrate functions of SVG and APF into one, low cost; 5. Adopt the PWM interleaving technique, with low harmonic of itself; 6. Small land occupation area, and the design life up to 20 years.		1. Power system in need of comprehensive compensation against reactive power, harmonic and three-phase imbalance. 2. Power system sensitive to the voltage fluctuation and flickering of power network, such as that related to precise textile. 3. High voltage and ultra-high voltage flexible AC power transmission. 4. Compensation to large industrial consumers such as steel metallurgical enterprises and petrochemical engineering enterprise. 5. The remote and border areas with poor electricity availability, such as the rural areas, mountainous areas, and wind power plant. 6. Special compensation to large loads such as the rolling mill, electric-arc furnace, electrified rail traction power station, etc.

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High Voltage static dynamic reactive Power compensation and filter device

Electrical Power Quality Integrated Optimization Device MEC

Comparison table of MEC to traditional switch capacitor

?Features

?Application fields