Dynacomp

Overview

Dynacomp principle

Dynacomp ya kuma aiki mai zama da tafukar mafi girman kapasitoci da reaktori wanda an kafa su a hanyar elektroniki na gaba-gaba, bila yadda ake iya kawo. A cikin Dynacomp na tsohon fasa ta nuna a nan. An samu Dynacomps na fasa ta daya kuma. Dynacomp yana iya kula da aiki da zubucin voltaji daga 380V zuwa 690V.

Thyristors suna fitowa a lokacin da current na kapasiti yake faruwa. Saboda haka, kapasitoci suka shiga a cikin network bila yadda ake iya kawo transients.

Ingancin aikin yana nuna cewa bayanai na current na biyu ne da za a gano. Wannan yana tabbatar da ba a gane harmonics ko transients daga Dynacomp ba.

Connection diagram

● Wannan aikin ya zama daidai don systems na closed-loop da kuma external trigger. Don configurations masu inganta, tafara a tuntubi. Bayanai da controller ke bayar su ne network measurements a cikin idan.
● Systems na fasa ta daya suna samu. Tafara a tuntubi
● External trigger system, idan an bukata, yana da ita da kuma duwatsu (opto1 da opto2: 15-24Vdc)

Typical applications

Harbour crane
Kawon kapasitoci mai kyau yana jawo transients masu yawan a lokacin da voltage na kapasiti da network voltage suna faruwa a lokacin da an kawo. Saboda haka, banks na yanzu babu da delays (~1 minute) a kan switching on/off kapasitoci. Wannan delay yana ba aiki da discharge resistors, amma yana haifar da utilization of conventional capacitor banks for rapidly fluctuating loads requiring frequent switchings.

Saboda kawon Dynacomp ba da kyau a bukatar discharge of the capacitors, utilization of the Dynacomp for the compensation of any load with rapid variations yana da kyau. A cikin cycle na crane, ana bukatar reactive power na biyu. Dukkan cycle na crane yana da shekaru ta lafiya. Compensation with conventional banks ba da kyau a wannan aiki: cycle yana da ci gaba da reactive power yana da yawan aiki. Dynacomp yana taimakawa da power factor tare da kula da reactive current drawn from the grid. Wannan yana nuna cewa current drawn from the supply system yana da ci gaba. Presence of 7% detuning reactor yana taimakawa da harmonic absorption which is reflected in reduced THDV levels.

Welding machine
Welding equipment typically draws high welding current for a very short time. As a result, the repetitive impermissible voltage variations may result.

A cikin figures na nan, 4 steps of 150 kvar are switched on for the compensation of a 210 kVA single phase welder with the use of an external signal for instantaneous response time (voltage drop compensation). These figures show clearly that the voltage drop due to the welding machine is totally reduced. Perturbation to sensitive devices like PLC, computers, lighting, ... are avoided.

In addition to this positive effect, the quality of the welding is considerably improved leading to a better quality of the final product. At the same time the power consumption of the production line is significantly lowered.

Rolling mill
Rolling mill normally employs large DC drives where the metal is rolled from billets to various sheet thicknesses. The load on the network depends on the type of “Pass” and grade of material being rolled. A typical load cycle lasts from a few minutes to several minutes during which the reactive power demand varies rapidly.

A classical solution employing contactors as switching device can not properly compensate the load of a rolling mill. The Dynacomp due to its superior performance is the ideal solution for rolling mill applications.

The Dynacomp successfully performs the task of reactive compensation, reducing the reactive power drawn from the supply network and hence improving the power factor. The reduced line current helps in loss reduction of the overall system. The reduced voltage distortion due to harmonic absorption by the Dynacomp is an added advantage. The stable bus voltage means a better quality of the finished product. All these add to the overall efficiency of the complete system.

Oil drilling platform
Offshore platforms normally use on-board generators to power the electrical loads. These loads consume high active power (kW) at very low cos φ implying a very high reactive (kvar) power.

As a result, most of these platforms run more number of generators than needed to meet the active power (kW) demand. This results in high operation and maintenance costs of the generators. A suitably rated Dynacomp relieves the generators from extreme reactive power burden and lets them operate at optimal cos φ. This results in a significant reduction in load current to be supplied by the generators and as a consequence some of the
generators can be switched off. It gives direct benefit in terms of saved fuel and maintenance cost apart from other benefits thanks to the improved cos φ;. production line is significantly lowered.

Technology parameters