Reactive power compensation in electrical power system
View Patent ↗A reactive power compensation system for compensating reactive power requirements in an electrical power system. The reactive power compensation system includes a static synchronous compensation unit, a current harmonics elimination unit, and a compensation control unit. The static synchronous compensation unit includes a plurality of static synchronous compensation modules for compensating reactive power in the electrical power system. The current harmonics elimination unit includes a plurality of active filter modules for eliminating current harmonics generated in the electrical power system. The compensation control unit implements a sequential control mechanism for regulating the operation of the static synchronous compensation modules and the active filter modules.
1. A reactive power compensation system for reactive power compensation in a power transmission network, the power transmission network comprising a wind power generation unit, the reactive power compensation system comprising:
a static synchronous compensation unit comprising a plurality of static synchronous compensation modules for compensating reactive power in the power transmission network;
a harmonics elimination unit comprising a plurality of active filter modules for eliminating current harmonics generated in the power transmission network; and
a compensation control unit for controlling the operation of the static synchronous compensation unit and the harmonics elimination unit,
wherein the compensation control unit is configured to facilitate a sequential control of the plurality of static synchronous compensation modules and the plurality of active filter modules in a predefined sequence based on a load condition in the power transmission network, and
wherein each active filter module comprises a plurality of passive filters, an inverter, an inverter current control unit, and a transformer unit.
2. The reactive power compensation system of claim 1 , wherein each static synchronous compensation module comprises a capacitor bank, a capacitor bank control unit, and a controlled switch.
3. The reactive power compensation system of claim 2 , wherein each static synchronous compensation module further comprises an inverter, an inverter current control unit, and a transformer unit.
4. The reactive power compensation system of claim 1 , wherein the compensation control unit comprises a microcontroller.
5. The reactive power compensation system of claim 1 , wherein the a compensation control unit is configured to interface with a SCADA system to retrieve information related to magnitude of reactive power compensation for power transmission network.
6. The reactive power compensation system of claim 1 , wherein the static synchronous compensation unit implements a hysteresis band control for generating a sinusoidal current in the power transmission network.
7. The reactive power compensation system of claim 1 , wherein a current distortion level at load points below full-load reaches the same current distortion level achieved at full-load.
8. The reactive power compensation system of claim 1 , wherein the current distortion level at nth factor of nominal power supply is same as the current distortion level at nominal power, wherein n is the number of static synchronous compensation modules in the static synchronous compensation unit.
9. The reactive power compensation system of claim 1 , wherein the harmonics elimination unit removes current harmonics up to 19 th order.
10. A reactive power compensation system for reactive power compensation in a power transmission network, the power transmission network comprising a wind power generation unit, the reactive power compensation system comprising:
a static synchronous compensation unit comprising a plurality of static synchronous compensation modules for compensating reactive power in the power transmission network;
a harmonics elimination unit comprising a plurality of active filter modules for eliminating current harmonics generated in the power transmission network; and
a compensation control unit for controlling the operation of the static synchronous compensation unit and the harmonics elimination unit,
wherein the compensation control unit is configured to facilitate a sequential control of the plurality of static synchronous compensation modules and the plurality of active filter modules in a predefined sequence based on a load condition in the power transmission network, and
wherein the compensation control unit is configured to interface with a SCADA system to retrieve information related to magnitude of reactive power compensation for power transmission network.
11. A reactive power compensation system for reactive power compensation in a power transmission network, the power transmission network comprising a wind power generation unit, the reactive power compensation system comprising:
a static synchronous compensation unit comprising a plurality of static synchronous compensation modules for compensating reactive power in the power transmission network;
a harmonics elimination unit comprising a plurality of active filter modules for eliminating current harmonics generated in the power transmission network; and
a compensation control unit for controlling the operation of the static synchronous compensation unit and the harmonics elimination unit,
wherein the compensation control unit is configured to facilitate a sequential control of the plurality of static synchronous compensation modules and the plurality of active filter modules in a predefined sequence based on a load condition in the power transmission network, and
wherein the static synchronous compensation unit implements a hysteresis band control for generating a sinusoidal current in the power transmission network.