Sistema ta Ƙarfin Dukkiyar Karamin Hadi

Akwụkwọ nke eme nri ọkachamara nwere ịhụnanya site na ụzọ gbanwee okwuokwu mgbakwunye mgbe ahụ maka ụzọ gbanwee okwuokwu mgbakwunye mgbe na ụzọ gbanwee okwuokwu mgbakwunye isi. Ufie, ụzọ gbanwee okwuokwu mgbakwunye mgbe na ụzọ gbanwee okwuokwu mgbakwunye isi bụ otu a ma ama dị mkpa n'etiti ọrụ ụdị ọnụ nri ọkachamara.

Ụzọ Gbanwee Okwuokwu

Isi nwere ezi obere na VSC converters dị ka ọtụtụ site na PWM. Ọtụtụ a bụrụkwa generator side converter na grid side converter. Ụzọ gbanwee okwuokwu mgbakwunye mgbe na ụzọ gbanwee okwuokwu mgbakwunye isi converters nwere ezi obere na rotor winding site na ịkpata nri ọkachamara nke ọma na ịhụnanya static reactive power output. Mba ọ bụrụ na turbine na-eme n'oge mgbakwunye mgbe, nri nwere ezi obere na rotor na grid side converter na-enye nri site na rotor side converter na-enye inverter, nwere ezi obere na turbine. Mba ọ bụrụ na turbine na-eme n'oge mgbakwunye isi, stator na rotor nwere ike ịna-eme nri n'ụzọ. Mba ọ bụrụ na turbine na-eme n'oge mgbakwunye isi, generator na-enye nri n'ụzọ motor na converter system na-enye DC excitation na rotor.

Grid side converter na generator side converter nwere ezi obere na ụzọ gbanwee okwuokwu mgbakwunye mgbe. Grid side control unit na-enye ezi obere na DC busbar voltage stability na ịhụnanya high quality input current waveform na unit power factor. Generator side control unit na-enye ezi obere na rotor current torque na excitation components na doubly fed motor site na ịhụnanya active power na reactive power output, na tracking active power order na reactive power order. Nke a bụrụ na doubly fed motor nwere ike ịme n'ọchịchị ọma nke ọkachamara nke ọma.

Nkọwa Nke System

• Cabinet Arrangement

Rockwill doubly fed converter system bụ otu a ma ama dị mkpa nke enweghị ọrụ maka doubly fed wind power turbines. Ọ nwere grid interconnection/control cabinet (1200mm*800mm*2200mm, protection class is IP54), na power module cabinet (1200mm*800mm*2200mm, protection class is IP23).

-- Grid interconnection/control system nwere ịbụ ụzọ abụọ, nke bụ control cabinet na grid interconnection cabinet. Control cabinet nwere controller, UPS, low voltage circuit breakers, protection devices na wiring terminals, etc. Grid interconnection cabinet nwere distribution transformer, main circuit breaker, grid interconnection contactor, grid side contactor, main fuse, na pre-charging resistor, etc.

-- Power module cabinet bụ otu a ma ama dị mkpa maka ịkpata current conversion. Nke a bụrụ na ọ nwere ụzọ abụọ n'ụzọ grid na generator sides. Ọtụtụ a nwere IGBT, drive board, radiator, DC capacitor, absorption capacity, temperature measuring resistor, etc. Power module cabinet nwere kama laminated busbar, grid side reactor, bridge arm side reactor, generator side reactor, grid side na generator side filtering resistor na capacitor, large na small fans, heater, etc.

• Primary Part

Primary part na converter system nwere power modules, filtering system, temperature control system, precharging system, LVRT (Low Voltage Ride Through) unit na distribution system, etc.

-- Power module nwere IGBT na ụzọ gbanwee okwuokwu, protection, heat dissipation accessories. Na converter system, ọ nwere ụzọ isii nke power modules, nke bụrụkwa na laminated DC busbar.

-- Filtering system nwere grid-side LCL filter na generator-side du/dt filter. Grid-side LCL filter nwere ike ịkpata high frequency harmonics n'ụzọ converter na grid. Du/dt filter, together with choking reactor na generator side, nwere ike ịkpata voltage peak na fast transient voltage na rotor insulating components.

-- Temperature control system nwere ike ịkpata temperature inside the cabinet n'ọdịda normal range site na heating na cooling, na heating na-enyere na heater na cabinet na cooling na-enyere na fan cooling system.

-- Pre-charging system nwere ike ịkpata DC voltage na DC capacitor n'ụzọ certain amplitude mgbe na startup na converter. Nke a nwere ike ịkpata current impulse na converter startup.

-- LVRT unit nwere ike ịkpata power semiconductor devices na generator side n'ụzọ operation fault, line fault, ma ọ bụ rotor overvoltage. Nke a nwere ike ịkpata converter system ịna-eme nri n'ụzọ grid mgbe na grid fault, nke bụrụ na ịkpata low voltage ride through.

-- Power distribution system nwere ike ịkpata uninterrupted power supply maka ọtụtụ active device na converter.

• Control and Protection System

Control and protection system bụ ụzọ gbanwee okwuokwu na converter system, nke nwere ike ịkpata performance. Control and protection system na-enye ụzọ gbanwee okwuokwu:

-- Control functions: grid-side control, generator-side control na LVRT control.

-- Protection functions: overcurrent protection na grid-side na generator-side converter, undervoltage na overvoltage protection na grid-side na generator-side converter, negative sequence overcurrent protection na grid-side na generator side converter, undervoltage na overvoltage protection na DC busbar, overtemperature protection na grid-side na generator-side converter, generator overspeed protection.

Otu Nke Aha

• Fast response capabilities na high control precision;

• Complete fault recording function conformed na IEEE COMTRADE format;

• Highly reliable na flexible integrated protection system;

• Grid interconnection control strategy based na self-adaptive positioning na rotor nwere ike ịkpata “zero” impulse grid synchronization;

• Photo-electric encoder, nke na-enye software reset mode, nwere ike ịkpata accuracy na reliability na motor rotation speed acquisition;

• High voltage na low voltage ride through control strategies na-enye converter fault ride through capability;

• Harmonics suppression control strategy na dead zone compensation strategy na-enye ịkpata quality na power delivered na converter na grid;

• Compatible na various industrial fieldbus communication interfaces, dị ka CANopen na Profibus;

• Identical IGBT converter bridge modules nwere ịbụ ụzọ abụọ, na installation na removal na each power module bụ otu a ma ama dị mkpa;

• Elaborately designed filtering system na harmonics restraint control strategy na-enye superior quality na power delivered na grid;

• This product nwere ike ịkpata high/low temperatures na high humidity. Ọtụtụ circuit boards nwere anti-corrosion coating na ọtụtụ cabinets nwere very high protection class.