CN111668874B - Optimization method for capacity calculation and plant load starting sequence of black-start diesel engine unit of thermal power plant - Google Patents

Optimization method for capacity calculation and plant load starting sequence of black-start diesel engine unit of thermal power plant Download PDF

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CN111668874B
CN111668874B CN202010652267.4A CN202010652267A CN111668874B CN 111668874 B CN111668874 B CN 111668874B CN 202010652267 A CN202010652267 A CN 202010652267A CN 111668874 B CN111668874 B CN 111668874B
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capacity
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diesel engine
thermal power
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CN111668874A (en
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童伟林
杨光中
邵臻卫
刘志仁
缪立恒
张文程
熊世旺
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Wuxi Power Supply Co of State Grid Jiangsu Electric Power Co Ltd
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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
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381—Dispersed generators
    • 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
    • H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
    • H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
    • H02J3/144—Demand-response operation of the power transmission or distribution network
    • 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
    • H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
    • H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems
    • Y04S20/222—Demand response systems, e.g. load shedding, peak shaving

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Abstract

The invention provides an optimization method for capacity calculation and plant load starting sequence of a black-start diesel engine unit of a thermal power plant, which comprises the following steps of: step S1, reading plant load data of the thermal power plant, and adding and calculating the total capacity Se1 of all plant loads; step S2, optimizing the starting sequence of the plant load by utilizing a particle swarm optimization algorithm, and obtaining the total capacity Se2 of the plant load corresponding to the optimized starting sequence; step S3, taking the larger value of Se1 and Se2 as the capacity Se of the diesel engine set; simulating the voltage drop condition of the service bus under the condition of starting the service load with the maximum capacity, and gradually increasing the capacity Se of the diesel engine set to Se + delta Se when the voltage drop delta V of the bus is greater than the set condition delta Vset until the voltage drop of the bus meets the requirement; and determining the optimized calculation capacity Se of the diesel engine set. The invention can reduce the cost of the thermal power plant for arranging the diesel engine unit on the basis of ensuring the normal start of the plant load.

Description

Optimization method for capacity calculation and plant load starting sequence of black-start diesel engine unit of thermal power plant
Technical Field
The invention belongs to the technical field of power supply, and particularly relates to an optimization method for capacity calculation of a black-start diesel unit of a thermal power plant and a plant load starting sequence.
Background
Due to the high interconnection of the existing power grids and the influence of various uncertain factors, the major power failure accident of the power system is almost inevitable. Therefore, how to rapidly recover self-rescue after system breakdown needs to be considered, so as to reduce economic loss and social turbulence caused by accidents. The importance of researching the black start process of the power system is fully explained in recent years by the frequent large-area power failure accidents of the power system in various countries, and the black start of a thermal power plant is an important component of the black start process.
The thermal power generating unit has complex process systems and more factory loads and types of the systems. The key of starting the thermal power generating unit is to smoothly and sequentially start each service load according to a process system flow, and the thermal power generating unit generally has no self-starting capability when a black fault occurs.
Compared with other units such as a combustion engine and the like, the diesel generator set (referred to as the diesel generator set for short) has the advantages of simple start, high start speed, small occupied area and the like. The diesel engine unit can meet the power demand of the service load, so that the starting of the thermal power unit is realized.
The thermal power generating unit needs to be provided with a diesel generating unit with enough capacity, so that the normal starting of a service load is ensured; at present, on one hand, the load starting sequence is not optimized, the capacity setting value of a diesel engine unit is generally large, and the cost is increased; on the other hand, the method is lack of model establishment and simulation verification so as to ensure that the thermal power plant can smoothly complete the whole black start process under the set diesel unit capacity.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides an optimization method for the capacity calculation of a black-start diesel unit of a thermal power plant and the start sequence of a plant load, which can reduce the cost of the diesel unit of the thermal power plant on the basis of ensuring the normal start of the plant load. The technical scheme adopted by the invention is as follows:
a method for optimizing the capacity calculation and the plant load starting sequence of a black-start diesel unit of a thermal power plant comprises the following steps:
step S1, reading plant load data of the thermal power plant, and adding and calculating the total capacity Se1 of all plant loads;
step S2, optimizing the starting sequence of the plant loads by utilizing a particle swarm optimization algorithm, and obtaining the total capacity Se2 of the plant loads corresponding to the optimized starting sequence;
step S3, taking the larger value of Se1 and Se2 as the capacity Se of the diesel engine set; simulating the voltage drop condition of the service bus under the condition of starting the service load with the maximum capacity, and gradually increasing the capacity Se of the diesel engine set to Se + delta Se when the voltage drop delta V of the bus is greater than the set condition delta Vset until the voltage drop of the bus meets the requirement; and determining the optimal calculation capacity Se of the diesel engine set according to the data.
Further, in step S2, the following mathematical model needs to be established:
setting the starting sequence of n service loads as F1,F2,...Fm...Fn(ii) a Taking the minimum value minSe of the capacity of the diesel engine set which meets the normal starting of all plant loads as an objective function, and meeting the following constraint conditions:
(1) the plant load starting sequence required by the thermal power plant process system;
(2) overload capacity requirement of the diesel engine set;
(3) when each service load is started, the bus voltage drop meets the system requirement;
for constraint (2): setting rated capacities of n service loads as S1,S2,...Sm...SnRated power of P1,P2,...Pm...Pn(ii) a Sequentially loading the service loads, and meeting the requirement of the set capacity of the diesel engine unit:
Figure BDA0002575405230000021
wherein, KSStarting current multiple, P, for maximum service loadmRated power, K, for maximum service loadOLThe overload coefficient of the diesel engine set;
the load of each factory load needs to be calculated in sequence, namely n times of calculation;
and for the established mathematical model, obtaining an optimized starting sequence and the corresponding total capacity Se2 of the plant load by using a particle swarm optimization algorithm.
Further, after step S3, the method further includes: according to the optimized starting sequence of Se and plant loads, models of the diesel unit and all plant loads are built by using Simulink, and the black starting process of the thermal power plant by using the diesel unit is simulated.
The invention has the advantages that: the invention can reduce the configuration capacity of the diesel generating set of the thermal power plant and reduce the cost of the diesel generating set of the thermal power plant on the basis of ensuring the normal start of the plant load.
Drawings
FIG. 1 is a flow chart of the method of the present invention.
Detailed Description
The invention is further illustrated by the following specific figures and examples.
The embodiment of the invention provides an optimization method for capacity calculation of a black start diesel unit of a thermal power plant and a plant load start sequence, which is realized by Matlab/Simulink software; the method comprises the following steps:
step S1, reading plant load data of the thermal power plant, and adding and calculating the total capacity Se1 of all plant loads;
step S2, optimizing the starting sequence of the plant load by utilizing a Particle Swarm Optimization (PSO) algorithm, and obtaining the total capacity Se2 of the plant load corresponding to the optimized starting sequence;
in this step, the following mathematical model needs to be established:
setting the starting sequence of n service loads as F1,F2,...Fm...Fn(ii) a Taking the minimum value minSe of the capacity of the diesel engine unit which meets the normal starting of all plant loads as a target function, and meeting the following constraint conditions:
(1) the plant load starting sequence required by the thermal power plant process system;
(2) overload capacity requirement of the diesel engine set;
(3) when each service load is started, the bus voltage drop meets the system requirement;
for constraint (2): setting rated capacities of n service loads as S1,S2,...Sm...SnRated power of P1,P2,...Pm...Pn(ii) a Sequentially loading the service loads, and meeting the set capacity of the diesel engine set:
Figure BDA0002575405230000022
wherein, KSStarting current multiple, P, for maximum service loadmRated power, K, for maximum service loadOLThe overload coefficient of the diesel engine set;
the load of each plant load needs to be calculated in sequence, namely n times of calculation;
for the established mathematical model, obtaining an optimized starting sequence and the corresponding total capacity Se2 of the plant load by using a particle swarm optimization algorithm;
step S3, taking the larger value of Se1 and Se2 as the capacity Se of the diesel engine set; simulating the station bus voltage drop condition under the condition of starting the station load with the maximum capacity by using Simulink, and gradually increasing the capacity Se of the diesel engine unit to Se + Delta Se when the bus voltage drop Delta V is greater than a set condition Delta Vset until the bus voltage drop meets the requirement; and determining the optimal calculation capacity Se of the diesel engine set according to the data.
And finally, according to the optimized starting sequence of Se and plant loads, models of the diesel unit and all plant loads are built by using Simulink, and the black starting process of the thermal power plant by using the diesel unit is simulated.
Taking a certain 3 × 250MW thermal power generation construction project as an example, the 10kV plant load is shown in the following table:
Figure BDA0002575405230000031
TABLE 1
The total capacity Se1 of all the plant loads is calculated in an adding mode and is 14074kVA, the maximum load capacity is 2500kVA, the total capacity of the diesel engine set determined by setting calculation according to the prior art is 22299kVA, and a cooling water pump is set to be started before a condensate pump in optimization calculation; the total capacity Se2 of the plant loads determined after optimizing the start-up sequence of the plant loads is 14785kVA, and obviously, compared with 22299kVA, the configuration capacity of the diesel unit can be reduced, and the start-up sequence of the plant loads after optimizing is shown in the following table:
Figure BDA0002575405230000041
TABLE 2
Simulink simulation start-up procedure: the lowest voltage of the system is 0.84pu, and the maximum power impact of the generator set is 1.44 pu. The start-up procedure meets the requirements.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention is described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims (2)

1. A method for optimizing the capacity calculation and the plant load starting sequence of a black-start diesel unit of a thermal power plant is characterized by comprising the following steps of:
step S1, reading plant load data of the thermal power plant, and adding and calculating the total capacity Se1 of all plant loads;
step S2, optimizing the starting sequence of the plant load by utilizing a particle swarm optimization algorithm, and obtaining the total capacity Se2 of the plant load corresponding to the optimized starting sequence;
step S3, taking the larger value of Se1 and Se2 as the capacity Se of the diesel engine set; simulating the voltage drop condition of the station service bus under the condition of starting the station service load with the maximum capacity, and gradually increasing the capacity Se of the diesel engine set to Se + Delta Se when the voltage drop Delta V of the bus is greater than a set condition Delta Vset until the voltage drop of the bus meets the requirement; determining the optimized calculation capacity of the diesel engine set as Se according to the data;
in step S2, the following mathematical model needs to be established:
setting the starting sequence of n service loads as F1,F2,...Fm...Fn(ii) a Taking the minimum value minSe of the capacity of the diesel engine set which meets the normal starting of all plant loads as an objective function, and meeting the following constraint conditions:
(1) the plant load starting sequence required by the thermal power plant process system;
(2) overload capacity requirement of the diesel engine set;
(3) when each service load is started, the bus voltage drop meets the system requirement;
for constraint (2): setting rated capacities of n service loads as S1,S2,...Sm...SnRated power of P1,P2,...Pm...Pn(ii) a Sequentially loading the service loads, and meeting the set capacity of the diesel engine set:
Figure FDA0003650562860000011
wherein, KSStarting current multiple, P, for maximum service loadmRated power, K, for maximum service loadOLThe overload coefficient of the diesel engine set;
the load of each factory load needs to be calculated in sequence, namely n times of calculation;
and for the established mathematical model, obtaining an optimized starting sequence and the corresponding total capacity Se2 of the plant load by using a particle swarm optimization algorithm.
2. The method for thermal power plant black start diesel unit capacity calculation and plant load start-up sequence optimization of claim 1,
after step S3, the method further includes: according to the optimized starting sequence of Se and plant loads, models of the diesel unit and all plant loads are built by using Simulink, and the black starting process of the thermal power plant by using the diesel unit is simulated.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104102954A (en) * 2014-07-14 2014-10-15 南方电网科学研究院有限责任公司 Optimal configuration method of distributed comprehensive energy supply system considering black start function
CN104166092A (en) * 2014-07-17 2014-11-26 中国核电工程有限公司 Optimization method of capacity verification of diesel generating set of nuclear power plant
CN104578060A (en) * 2015-01-22 2015-04-29 中国电力工程顾问集团西北电力设计院有限公司 Method for selecting black-start diesel engine of SFC self-start gas turbine set

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104102954A (en) * 2014-07-14 2014-10-15 南方电网科学研究院有限责任公司 Optimal configuration method of distributed comprehensive energy supply system considering black start function
CN104166092A (en) * 2014-07-17 2014-11-26 中国核电工程有限公司 Optimization method of capacity verification of diesel generating set of nuclear power plant
CN104578060A (en) * 2015-01-22 2015-04-29 中国电力工程顾问集团西北电力设计院有限公司 Method for selecting black-start diesel engine of SFC self-start gas turbine set

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
火电厂黑启动柴油发电机组容量计算与选型;李世光等;《山东电力技术》;20160325;第64-67页 *

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