What do the main power and standby power of diesel generator set mean respectively?
2021-09-07
In China, the main power is the nominal power of diesel generator set. The continuous power of the generator set refers to the maximum power that can be used continuously within 24 hours; The maximum power standard is: in a certain period of time, the unit power can be overloaded by 10% on the basis of continuous power every 12 hours. At this time, the unit power is the maximum power, that is, the standby power.
For example, if you buy a 400KW main unit, you can run to 440kw in one hour within 12 hours. If you buy a standby 400KW unit, if you don't overload, you usually open it at 400KW. In fact, the unit has always been in the overload state (because the actual rated power of the unit is only 360kw), which is very unfavorable to the unit, It will shorten the service life of the unit and increase the failure rate.
1) The unit of apparent power is KVA, which is used to express the capacity of transformer and UPS in China.
2) The active power is 0.8 times of the apparent power, and the unit is kW. China is used to power generation equipment and electrical equipment.
3) The rated power of diesel generator set refers to the power that can operate continuously for 12 hours.
4) The maximum power is 1.1 times the rated power, but only 1 hour is allowed within 12 hours.
5) The economic power is 0.5 ~ 0.75 times of the rated power, which is the output power of diesel generator set that can operate for a long time without time limit. When operating at this power, the fuel is the most economical and the failure rate is the lowest.
Parameters and technical requirements of diesel generator set with main power of 1000kW
1、 Electrical performance index of diesel generator set
1. The rated voltage is 400 / 230 V (load voltage 380 / 220V). When the unit is at 95% ~ 100% rated voltage, it must meet the following electrical performance indexes. Main power / standby power 1000kW / 1100kw
2. Rated frequency 50Hz rated power factor 0.8 (lag)
3. Wiring mode 3-phase 4-wire voltage regulator (%)
4. Steady state ≤± 1 transient ≤ + 20 ∽ - 15
5. Frequency regulator (%) steady state ≤ 3 (0 ∽ 5) transient ≤ + 10 ∽ - 7
6. Rated speed 1500r / min recovery time ≤ 6S voltage fluctuation rate (%) ≤ 0.5 frequency fluctuation rate (%) ≤ 0.5
7. Load sudden change voltage stability time (s) ≤ 3 load sudden change frequency stability time (s) ≤ 5
8. Waveform distortion rate (%) ≤ 5
9. The suppression of no red electric interference shall comply with the provisions of gb2820 and vde0875-n
2、 Technical requirements for diesel generator set
1. The engine shall be suitable for using light diesel oil conforming to bs2869a1 or A2 as fuel, water cooling, four stroke, direct injection, natural or pressure air supply, and comply with the provisions of bs5514. The rated capacity of the engine shall meet the requirements of bs5514 for continuous operation and match the rated capacity of the generator for continuous operation.
2. The rated speed of the engine is 1500r / min, and its normal rotation direction must be counterclockwise.
3. Install electronic speed regulating and stabilizing device and overspeed trip mechanism to cut off fuel when overspeed is 15%.
4. The cooling system is forced closed circulating water cooling.
5. The engine shall be equipped with manual stop lever.
6. The engine water jacket is equipped with an electric heater controlled by the thermostatic controller to maintain the water temperature of about 20 ℃ (or according to the temperature recommended by the manufacturer) to ensure that the engine is easy to start when necessary; When the engine is put into operation, the heater shall be cut off immediately, and the control panel is equipped with a manual on-off switch.
For example, if you buy a 400KW main unit, you can run to 440kw in one hour within 12 hours. If you buy a standby 400KW unit, if you don't overload, you usually open it at 400KW. In fact, the unit has always been in the overload state (because the actual rated power of the unit is only 360kw), which is very unfavorable to the unit, It will shorten the service life of the unit and increase the failure rate.
1) The unit of apparent power is KVA, which is used to express the capacity of transformer and UPS in China.
2) The active power is 0.8 times of the apparent power, and the unit is kW. China is used to power generation equipment and electrical equipment.
3) The rated power of diesel generator set refers to the power that can operate continuously for 12 hours.
4) The maximum power is 1.1 times the rated power, but only 1 hour is allowed within 12 hours.
5) The economic power is 0.5 ~ 0.75 times of the rated power, which is the output power of diesel generator set that can operate for a long time without time limit. When operating at this power, the fuel is the most economical and the failure rate is the lowest.
Parameters and technical requirements of diesel generator set with main power of 1000kW
1、 Electrical performance index of diesel generator set
1. The rated voltage is 400 / 230 V (load voltage 380 / 220V). When the unit is at 95% ~ 100% rated voltage, it must meet the following electrical performance indexes. Main power / standby power 1000kW / 1100kw
2. Rated frequency 50Hz rated power factor 0.8 (lag)
3. Wiring mode 3-phase 4-wire voltage regulator (%)
4. Steady state ≤± 1 transient ≤ + 20 ∽ - 15
5. Frequency regulator (%) steady state ≤ 3 (0 ∽ 5) transient ≤ + 10 ∽ - 7
6. Rated speed 1500r / min recovery time ≤ 6S voltage fluctuation rate (%) ≤ 0.5 frequency fluctuation rate (%) ≤ 0.5
7. Load sudden change voltage stability time (s) ≤ 3 load sudden change frequency stability time (s) ≤ 5
8. Waveform distortion rate (%) ≤ 5
9. The suppression of no red electric interference shall comply with the provisions of gb2820 and vde0875-n
2、 Technical requirements for diesel generator set
1. The engine shall be suitable for using light diesel oil conforming to bs2869a1 or A2 as fuel, water cooling, four stroke, direct injection, natural or pressure air supply, and comply with the provisions of bs5514. The rated capacity of the engine shall meet the requirements of bs5514 for continuous operation and match the rated capacity of the generator for continuous operation.
2. The rated speed of the engine is 1500r / min, and its normal rotation direction must be counterclockwise.
3. Install electronic speed regulating and stabilizing device and overspeed trip mechanism to cut off fuel when overspeed is 15%.
4. The cooling system is forced closed circulating water cooling.
5. The engine shall be equipped with manual stop lever.
6. The engine water jacket is equipped with an electric heater controlled by the thermostatic controller to maintain the water temperature of about 20 ℃ (or according to the temperature recommended by the manufacturer) to ensure that the engine is easy to start when necessary; When the engine is put into operation, the heater shall be cut off immediately, and the control panel is equipped with a manual on-off switch.