CN104578060A - Method for selecting black-start diesel engine of SFC self-start gas turbine set - Google Patents
Method for selecting black-start diesel engine of SFC self-start gas turbine set Download PDFInfo
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- CN104578060A CN104578060A CN201510032881.XA CN201510032881A CN104578060A CN 104578060 A CN104578060 A CN 104578060A CN 201510032881 A CN201510032881 A CN 201510032881A CN 104578060 A CN104578060 A CN 104578060A
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- black starting
- diesel engine
- starting
- capacity
- black
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/001—Methods to deal with contingencies, e.g. abnormalities, faults or failures
Abstract
The invention discloses a method for selecting a black-start diesel engine of an SFC self-start gas turbine set, and belongs to the field of control and regulation of generators. SFC is the main start mode of the gas turbine set, and due to the fact that generally, the ratio of an SFC load to the total load of a black-start system is larger than 50%, the SFC load is the key factor for determining the capacity of the black-start diesel engine. In the starting process, the power of the black-start diesel engine should be not smaller than the sum of the start power of the load and the steady-state power of all the loads which operate before the load is started, and the capacity of the black-start diesel engine should is not smaller than the sum of the start capacity of the load and the steady-state capacity of all the loads which operate before the load is started. For the same black-start system load, the load starting sequence of an SFC gas turbine is different, and the selection of the capacity of the black-start diesel engine is correspondingly different. By means of the method, the capacity of the black-start diesel engine can be accurately calculated, and the purpose of accurately selecting types is achieved.
Description
Technical field
The invention belongs to the control and regulation field of generator, be specifically related to a kind of system of selection of black starting-up diesel engine of SFC self-starting gas turbine group.
Background technology
Black starting-up refers to that whole electrical network is because of after fault stoppage in transit, do not rely on other electrical network to help, start by having self-startup ability unit (black starting-up diesel generating set) in system, drive non self starting unit (gas turbine group), expand System recover scope gradually, finally realize the recovery of whole system.
Black starting-up power supply is extremely important to power plant, must ensure that it can reliable and stablely run, and requires that black starting-up system is more simple better; Generally have the motor-type load of relatively high power to need to start in black starting-up system, impulse current is very large in short-term, requires black starting-up unit strong shock resistance in short-term; The black starting-up unit operation time is short, and number of run is few, therefore does not require black starting-up unit continuously-running, but needs to adapt to short time high capacity operation.
Gas turbine group is in initial start stage, unit cannot provide powerful staring torque to start voluntarily, starting of static frequency conversion device (SFC:Static Frequency Converter) is that the AC power utilizing thyristor frequency converter to produce changeable frequency starts unit, is the main Starting mode of gas turbine group.SFC is generally made up of input transformer, harmonic filter, controller, rectifier, inverter and direct current reactor.The effect of SFC device provides electric power to generator, makes it become motor running, and be added in the frequency of generator power supply by adjustment, realizes generator amature rotating speed continuously adjustabe.Generally, SFC system is powered (under black starting-up state by the working power be connected on station-service high voltage bus, by black starting-up diesel-electric set electric supply), the substantially constant voltage of input and frequency transitions are variable voltage and frequency by SFC device, and this electric energy is supplied to the stator winding of generator, make generator startup stage be turned into synchronous motor.Its result makes generator accelerate by SFC exactly, after reaching certain rotating speed, gas turbine starts ignition operation, together with the generator that SFC drives, gas turbine is accelerated, when after the rated speed reaching generator, SFC system cut-off, its voltage be added on generator is made to be 0, now generator is by gas turbine driven rotary, then accesses excitation, normal power generation.
Visible, when electric network fault is stopped transport, black starting-up diesel engine for gas turbine group startup be exactly most important, and capacity is a key parameter of black starting-up diesel engine.Capacity Selection is too small, and the flame-out or too low gas turbine that causes of generating voltage of black starting-up diesel engine can be caused when gas turbine starts cannot to start at all; Capacity Selection is excessive, can cause transport, the difficulty of installing and unnecessary waste, increase maintenance workload.
At present, domestic do not have relevant standard criterion to select to make clear stipulaties, diesel engine generator Capacity Selection Primary Reference " thermal power plant station service designing technique specifies " DL/T5153-2002 Appendix D " selection of diesel generating set " in engineering design to black starting-up diesel capacity.But this regulation is a comparatively general principle being applicable to all diesel engines, and non-expert is selected for the black starting-up diesel capacity of SFC self-starting gas turbine group.
Summary of the invention
In order to overcome the defect that above-mentioned prior art exists, the object of the present invention is to provide a kind of system of selection of black starting-up diesel engine of SFC self-starting gas turbine group, the method is by calculating the required capacity of black starting-up diesel engine and the scope of power, and the specification sequence according to black starting-up diesel engine within the scope of this carries out type selecting, can reach the object of accurate type selecting.
For achieving the above object, the present invention adopts following technical scheme:
A system of selection for the black starting-up diesel engine of SFC self-starting gas turbine group, comprises the following steps:
1) by the value range of the capacity and power that calculate black starting-up diesel engine, computing formula is as follows: wherein, and the unit of capacity is kVA, and the unit of power is kW;
S≥max{S
steady，S
transitory}；
P≥max{P
steady，P
transitory}；
Wherein, S
transitory=S
steady F+ S
max start;
P
transitory＝P
steady F+P
max start；
S: black starting-up diesel capacity value range;
P: black starting-up diesel engine power value range;
S
steady: black starting-up system loading steady state capacity value sum;
P
steady: black starting-up system loading steady state power value sum;
S
steady F: the steady state capacity value sum of the load that the peak load in black starting-up system loading has been run before starting;
P
steady F: the steady state power value sum of the load that the peak load in black starting-up system loading has been run before starting;
S
max start: the starting capacity value of the peak load in black starting-up system loading;
P
max start: the starting power value of the peak load in black starting-up system loading;
2) in step 1) get the capacity minimum value and power minimum that meet black starting-up diesel engine specification sequence in the capacity of black starting-up diesel engine that obtains and the value range of power, when the capacity minimum value and power minimum that meet black starting-up diesel engine specification sequence belong to same black starting-up diesel engine specification, then select this specification black starting-up diesel engine; When the capacity minimum value and power minimum that meet black starting-up diesel engine specification sequence do not belong to same black starting-up diesel engine specification, then select the black starting-up diesel engine of wherein high gauge.
Further, black starting-up system loading comprises resistive load and induction-motor load.
Further, black starting-up system loading comprises SFC, combustion engine MCC, air compressor machine, oil feed pump, water-bath stove, bypass electric operator, hydrocarbon pump, electric operator, ups power, cabinet electricity consumption and cooling water pump.
Further, the boot sequence of black starting-up system loading is: combustion engine MCC, water-bath stove, oil feed pump, bypass electric operator, hydrocarbon pump, electric operator, ups power, cabinet electricity consumption, cooling water pump, air compressor machine, SFC.
Further, the boot sequence of black starting-up system loading is: combustion engine MCC, water-bath stove, oil feed pump, bypass electric operator, hydrocarbon pump, electric operator, ups power, cabinet electricity consumption, cooling water pump, SFC, air compressor machine.
Compared with prior art, the present invention has following useful technique effect:
The present invention is fully based on the start-up characteristic of SFC self-starting gas turbine set, SFC is the main Starting mode of gas turbine group, because the ratio of SFC load in black starting-up system total load has generally all exceeded 50%, it is the key factor determining diesel engine generator pool-size, the present invention is by calculating the required capacity of black starting-up diesel engine and the scope of power, and the specification sequence according to black starting-up diesel engine within the scope of this carries out type selecting, this method accurately can select the capacity of black starting-up diesel engine, both can not be too small because of Capacity Selection, flame-out or the too low gas turbine that causes of generating voltage of diesel engine can be caused cannot to start when gas turbine starts at all, also can not be excessive because of Capacity Selection, cause transport, the difficulty of installing and unnecessary waste, increase maintenance workload, be very significant for the construction of turbine power plant and safety and economic operation.
Further, in black starting-up process, under normal circumstances, the boot sequence of black starting-up load is the startup requirement according to main generator, or the requirement of operation, setting in advance, too many change cannot be done, but if boot sequence is rearranged to some insignificant loads, still can reduce the selection of diesel generating set power and capacity, thus the investment of reduction starting device.
Embodiment
Below the present invention is described in further detail:
Black starting-up diesel engine needs the load of power supply to be divided into resistive load and induction-motor load.The capacity of resistive load is less, and often just requires increasing progressively of black starting-up diesel engine active power when dropping into, and therefore selects impact little on black starting-up diesel capacity.And for induction-motor load, during different Starting mode, (directly startup, soft start, reduced-voltage starting, variable frequency starting etc.) starting capacity difference is larger, therefore, induction-motor load selects impact comparatively large on black starting-up diesel capacity, particularly maximum induction-motor load.The formula calculating the capacity of black starting-up diesel engine and the value range of power is as follows:
S≥max{S
steady，S
transitory}；
P≥max{P
steady，P
transitory}；
Wherein,
S: black starting-up diesel capacity value range (kVA);
P: black starting-up diesel engine power value range (kW);
S
steady: black starting-up system loading steady state capacity value sum (kVA);
P
steady: black starting-up system loading steady state power value sum (kW);
Wherein, S
transitory=S
steady F+ S
max start;
P
transitory＝P
steady F+P
max start；
S
transitory: the steady state capacity sum (kVA) of all loads run before the starting capacity of the peak load in black starting-up system loading and peak load start;
P
transitory: the steady state power sum (kW) of all loads run before the starting power of the peak load in black starting-up system loading and peak load start;
S
steady F: the steady state capacity value sum (kVA) of the load that the peak load in black starting-up system loading has been run before starting;
P
steady F: the steady state power value sum (kW) of the load that the peak load in black starting-up system loading has been run before starting;
S
max start: the starting capacity value (kVA) of the peak load in black starting-up system loading;
P
max start: the starting power value (kW) of the peak load in black starting-up system loading;
The boot sequence of black starting-up system loading has important impact to the power of black starting-up diesel engine and the selection of capacity.For same black starting-up system loading, the boot sequence of black starting-up system loading is different, the corresponding difference of Capacity Selection of black starting-up diesel engine.In order to reduce the capacity of black starting-up diesel engine as far as possible, under the prerequisite meeting black starting-up preparation, should preferentially start jumbo load, and then accessing other loads.Under normal circumstances, the boot sequence of black starting-up system loading is the startup requirement according to main generator, or the requirement of operation, prior setting, too many change cannot be done, but if boot sequence is rearranged to some insignificant loads, still can reduce the selection of black starting-up diesel engine power and capacity, thus the investment of reduction starting device.When the capability value that black starting-up diesel engine calculates is larger, then needs to adopt multiple stage diesel engine combination configuration, now should consider that appearance coefficient falls in parallel operation trueness error.
Below by specific embodiment, the present invention will be further described:
Certain engineering is two 90MW steam units and five 65MW gas turbine set, and every platform gas turbine set is provided with a set of starting of static frequency conversion device (SFC), by SFC self-starting combustion engine.Black starting-up system loading inventory is as shown in table 1, and from table 1, in this project, the ratio of SFC load in total load is considerably beyond 50%, is the key factor determining unit capacity.Wherein, frequency converter is that 12 impulse commutation PWM inversions export, and efficiency is 90%, and nominal operation power factor is 0.9, and setting starting current is restricted to 200%.
Table 1 black starting-up system loading inventory
Embodiment 1
Table 2 lists a start-up operation sequence scheme of black starting-up system loading.
Table 2 embodiment 1 black starting-up load capacity and power list
From embodiment 1,
S≥max{S
steady，S
transitory}＝max{4626.6，5274.1}＝5274.1kVA；
P≥max{P
steady，P
transitory}＝max{3726.3，4244.3}＝4244.3kW。
P in embodiment 1
steady=3726.3kW is black starting-up system loading steady state power value sum; S
steady=4626.6kVA is black starting-up system loading steady state capacity value sum; P
transitory=4244.3kW, for the starting power of the peak load in black starting-up system loading and peak load start before the steady state power sum of all loads run; S
transitory=5274.1kVA is the steady state capacity sum of all loads run before the starting capacity of peak load in black starting-up system loading and peak load start.
As can be seen from the above results, capacity >=the 5274.1kVA of the black starting-up diesel engine calculated in embodiment 1, power >=4244.3kW, in this scope, then get the capacity minimum value and power minimum that meet black starting-up diesel engine specification sequence, when the capacity minimum value and power minimum that meet black starting-up diesel engine specification sequence belong to same black starting-up diesel engine specification, then select this specification black starting-up diesel engine; When the capacity minimum value and power minimum that meet black starting-up diesel engine specification sequence do not belong to same black starting-up diesel engine specification, then select the black starting-up diesel engine of wherein high gauge.
Embodiment 2
Table 3 lists another start-up operation sequence scheme of black starting-up system loading.
Table 3 embodiment 2 black starting-up load capacity and power list
From embodiment 2,
S≥max{S
steady，S
transitory}＝max{4626.6，5586.6}＝5586.6kVA；
P≥max{P
steady，P
transitory}＝max{3726.3，4494.3}＝4494.3kW。
P in embodiment 2
steady=3726.3kW is black starting-up system loading steady state power value sum; S
steady=4626.6kVA is black starting-up system loading steady state capacity value sum; P
transitory=4494.3kW, for the starting power of the peak load in black starting-up system loading and peak load start before the steady state power sum of all loads run; S
transitory=5586.6kVA is the steady state capacity sum of all loads run before the starting capacity of peak load in black starting-up system loading and peak load start.
As can be seen from the above results, capacity >=the 5586.6kVA of the black starting-up diesel engine calculated in embodiment 2, power >=4494.3kW, in this scope, then get the capacity minimum value and power minimum that meet black starting-up diesel engine specification sequence, when the capacity minimum value and power minimum that meet black starting-up diesel engine specification sequence belong to same black starting-up diesel engine specification, then select this specification black starting-up diesel engine; When the capacity minimum value and power minimum that meet black starting-up diesel engine specification sequence do not belong to same black starting-up diesel engine specification, then select the black starting-up diesel engine of wherein high gauge.
As can be seen from embodiment 1 and embodiment 2, two schemes because boot sequence is different, the black starting-up diesel capacity calculated is different with the value range of power, and in scheme one, SFC starts comparatively morning, the black starting-up diesel capacity calculated and power less.
Above content is in conjunction with concrete preferred implementation further description made for the present invention; can not assert that the specific embodiment of the present invention is only limitted to this; for general technical staff of the technical field of the invention; without departing from the inventive concept of the premise; some simple deduction or replace can also be made, all should be considered as belonging to the present invention by submitted to claims determination scope of patent protection.
Claims (5)
1. a system of selection for the black starting-up diesel engine of SFC self-starting gas turbine group, is characterized in that, comprise the following steps:
1) by the value range of the capacity and power that calculate black starting-up diesel engine, computing formula is as follows: wherein, and the unit of capacity is kVA, and the unit of power is kW;
S≥max{S
steady，S
transitory}；
P≥max{P
steady，P
transitory}；
Wherein, S
transitory=S
steady F+ S
max start;
P
transitory＝P
steady F+P
max start；
S: black starting-up diesel capacity value range;
P: black starting-up diesel engine power value range;
S
steady: black starting-up system loading steady state capacity value sum;
P
steady: black starting-up system loading steady state power value sum;
S
steady F: the steady state capacity value sum of the load that the peak load in black starting-up system loading has been run before starting;
P
steady F: the steady state power value sum of the load that the peak load in black starting-up system loading has been run before starting;
S
max start: the starting capacity value of the peak load in black starting-up system loading;
P
max start: the starting power value of the peak load in black starting-up system loading;
2) in step 1) get the capacity minimum value and power minimum that meet black starting-up diesel engine specification sequence in the capacity of black starting-up diesel engine that obtains and the value range of power, when the capacity minimum value and power minimum that meet black starting-up diesel engine specification sequence belong to same black starting-up diesel engine specification, then select this specification black starting-up diesel engine; When the capacity minimum value and power minimum that meet black starting-up diesel engine specification sequence do not belong to same black starting-up diesel engine specification, then select the black starting-up diesel engine of wherein high gauge.
2. a kind of method being selected black starting-up diesel engine by calculated capacity according to claim 1, it is characterized in that, black starting-up system loading comprises resistive load and induction-motor load.
3. a kind of method being selected black starting-up diesel engine by calculated capacity according to claim 1, it is characterized in that, black starting-up system loading comprises SFC, combustion engine MCC, air compressor machine, oil feed pump, water-bath stove, bypass electric operator, hydrocarbon pump, electric operator, ups power, cabinet electricity consumption and cooling water pump.
4. a kind of method being selected black starting-up diesel engine by calculated capacity according to claim 3, it is characterized in that, the boot sequence of black starting-up system loading is: combustion engine MCC, water-bath stove, oil feed pump, bypass electric operator, hydrocarbon pump, electric operator, ups power, cabinet electricity consumption, cooling water pump, air compressor machine, SFC.
5. a kind of method being selected black starting-up diesel engine by calculated capacity according to claim 3, it is characterized in that, the boot sequence of black starting-up system loading is: combustion engine MCC, water-bath stove, oil feed pump, bypass electric operator, hydrocarbon pump, electric operator, ups power, cabinet electricity consumption, cooling water pump, SFC, air compressor machine.
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| CN109726914A (en) * | 2018-12-28 | 2019-05-07 | 国家电网有限公司 | A kind of unit recovery sorting consistence method considering starting efficiency decaying |
| CN110056437A (en) * | 2019-04-24 | 2019-07-26 | 南京泰润电力工程有限公司 | A kind of starting method of diesel-driven generator |
| CN110943489A (en) * | 2018-09-25 | 2020-03-31 | 中国能源建设集团广东省电力设计研究院有限公司 | Capacity determination method and device of generator, computer equipment and storage medium |
| CN111668874A (en) * | 2020-07-08 | 2020-09-15 | 国网江苏省电力有限公司无锡供电分公司 | Optimization method for capacity calculation and plant load starting sequence of black-start diesel engine unit of thermal power plant |
| CN111934349A (en) * | 2020-08-10 | 2020-11-13 | 中冶南方都市环保工程技术股份有限公司 | Diesel engine capacity optimization method based on isolated power grid black start |
| CN112653189A (en) * | 2021-01-20 | 2021-04-13 | 中国电建集团福建省电力勘测设计院有限公司 | Combustion engine black start method based on small combustion engine as black start power supply |
| CN112648080A (en) * | 2021-01-11 | 2021-04-13 | 大连欧谱纳透平动力科技有限公司 | Black start system of gas turbine |
| CN113530686A (en) * | 2021-07-15 | 2021-10-22 | 中国华能集团清洁能源技术研究院有限公司 | Black start system and method for gas turbine with multi-charging-discharging-rate energy storage |
| CN113922495A (en) * | 2021-10-13 | 2022-01-11 | 阳光电源(南京)有限公司 | Energy storage power station and black start method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110943489A (en) * | 2018-09-25 | 2020-03-31 | 中国能源建设集团广东省电力设计研究院有限公司 | Capacity determination method and device of generator, computer equipment and storage medium |
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| CN111668874B (en) * | 2020-07-08 | 2022-07-19 | 国网江苏省电力有限公司无锡供电分公司 | Optimization method for capacity calculation and plant load starting sequence of black-start diesel engine unit of thermal power plant |
| CN111934349A (en) * | 2020-08-10 | 2020-11-13 | 中冶南方都市环保工程技术股份有限公司 | Diesel engine capacity optimization method based on isolated power grid black start |
| CN112648080A (en) * | 2021-01-11 | 2021-04-13 | 大连欧谱纳透平动力科技有限公司 | Black start system of gas turbine |
| CN112653189A (en) * | 2021-01-20 | 2021-04-13 | 中国电建集团福建省电力勘测设计院有限公司 | Combustion engine black start method based on small combustion engine as black start power supply |
| CN112653189B (en) * | 2021-01-20 | 2023-02-03 | 中国电建集团福建省电力勘测设计院有限公司 | Combustion engine black start method based on small combustion engine as black start power supply |
| CN113530686A (en) * | 2021-07-15 | 2021-10-22 | 中国华能集团清洁能源技术研究院有限公司 | Black start system and method for gas turbine with multi-charging-discharging-rate energy storage |
| CN113922495A (en) * | 2021-10-13 | 2022-01-11 | 阳光电源(南京)有限公司 | Energy storage power station and black start method |
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