CN116526458A - Event-based generator set maintenance arrangement method and system - Google Patents

Event-based generator set maintenance arrangement method and system Download PDF

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CN116526458A
CN116526458A CN202310483375.7A CN202310483375A CN116526458A CN 116526458 A CN116526458 A CN 116526458A CN 202310483375 A CN202310483375 A CN 202310483375A CN 116526458 A CN116526458 A CN 116526458A
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张智荏
邵成成
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Xian Jiaotong University
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Abstract

The invention discloses a generator set overhaul scheduling method and system based on an event, which are used for establishing a generator set overhaul scheduling model based on the event according to overhaul requirements of a thermal power unit, a hydroelectric unit and a pumped storage unit in an electric power system; establishing a generator set operation model according to the upper and lower output limits of the thermal power generation unit, the hydroelectric power generation unit, the pumped storage unit, the wind power generation unit and the hydropower station power generation unit; establishing a system operation model according to the system load demand; and based on the generator set overhaul arrangement model, the generator set operation model and the system operation model, establishing a long-term operation model in the power system, solving to obtain the generator set overhaul arrangement, and realizing the overhaul of the generator set. The number of variables and constraint conditions in the generator set overhaul arrangement model established by the invention is small, the solving efficiency of the long-term operation model in the power system is effectively improved, and the generator set overhaul arrangement can be rapidly obtained, so that better support is provided for long-term optimization decision in the power system.

Description

Event-based generator set maintenance arrangement method and system
Technical Field
The invention belongs to the field of optimized operation of power systems, and relates to a generator set maintenance arrangement method and system based on events.
Background
The maintenance of the generator set has important roles in the power system and plays an important role in improving the running reliability and safety of the generator set and optimizing the scheduling and running of the power system. The power generation plan of the power system is reasonably arranged, so that the running cost and risk loss of the power system can be reduced, and the power supply reliability of the power system is ensured. Therefore, establishing a model capable of accurately describing the maintenance related constraint of the generator set is a key measure for ensuring the stable operation of the power system, improving the economic benefit of the power system and ensuring the electricity demand.
The renewable energy output of wind power, photovoltaic power and the like has obvious randomness, fluctuation and even intermittence under the influence of the primary energy characteristics of wind power, light power and the like. With the grid connection of high-proportion new energy sources, the maintenance arrangement of the generator set in the power system becomes complex, and the accuracy requirement on the maintenance arrangement model of the generator set is improved. Therefore, the generator set maintenance related constraint needs to be described in detail and accurately by considering the generator set characteristics and maintenance constraint and combining the actual situation of the power system, so as to improve the reliability of the generator set maintenance arrangement model.
Researchers have conducted many studies on a generator set overhaul scheduling model, and the existing generator set overhaul scheduling model is based on the time-related constraint established by the generator set overhaul state, and has the defects of large model variables and large constraint number. In order to improve the model solving efficiency, part of researches neglect part of overhaul constraints to simplify the model, and the related constraints of the overhaul of the generator set cannot be accurately described, so that the reliability of the overhaul arrangement model of the generator set is affected.
In summary, high-proportion new energy grid connection brings challenges to a power system generator set maintenance arrangement method, but the existing researches have the defects of large variable and number, incomplete maintenance constraint description and the like, so that a generator set maintenance scheme suitable for the actual operation of a power system cannot be obtained quickly, and support is difficult to be provided for the stable operation and the optimal scheduling of the power system.
Disclosure of Invention
The invention aims to adapt to the development prospect of a power system, and provides an event-based power generation unit maintenance scheduling method and system aiming at the defects of the existing power generation unit maintenance scheduling model modeling method.
In order to achieve the above purpose, the invention adopts the following technical scheme:
an event-based method for scheduling maintenance of a generator set, comprising the steps of:
according to maintenance requirements of thermal power, hydroelectric power and pumped storage units in an electric power system, an event-based generator set maintenance scheduling model is established;
establishing a generator set operation model according to the upper and lower output limits of the thermal power generation unit, the hydroelectric power generation unit, the pumped storage unit, the wind power generation unit and the hydropower station power generation unit;
establishing a system operation model according to the system load demand;
based on the generator set maintenance arrangement model, the generator set operation model and the system operation model, establishing a long-term operation model in the power system;
and solving a long-term operation model in the power system to obtain the maintenance arrangement of the generator set in the calculation period, and realizing the maintenance of the generator set.
Further, the constraints of the event-based genset overhaul schedule model include overhaul duration constraints, overhaul interval time constraints, overhaul period constraints, overhaul resource constraints, and overhaul time constraints.
Further, the constraints of the event-based genset overhaul schedule model are as follows:
wherein t represents a period number; t represents the total time period number in the calculation period; i represents the number of the unit; k represents the number of maintenance items; s is(s) i,t,k A 0-1 variable representing whether the unit i performs the maintenance item k in the period t; m_duration i,k Representing the duration of the overhaul project k of the unit i; m_num i Indicating the overhaul times of the unit i; ms of i,t A 0-1 variable which indicates whether the unit i is overhauled in the period t, if so, taking 1, otherwise, taking 0; m_interval i,k Representing the minimum interval time between two adjacent overhauls of the unit;the starting time of a maintenance project k of the unit i is represented; />The starting time of a maintenance item k+1 of the unit i is represented; />Respectively representing upper and lower limits of an overhaul period interval of an overhaul project k of the unit i; gp represents the power plant number; m_resource gp Indicating the upper limit of the overhaul resources of the power plant.
Further, the constraints of the generator set operation model comprise a set start constraint, a set output range constraint, a water energy constraint of a hydropower station to which the hydropower set belongs and a water pumping and power generation energy balance constraint of a pumping and storage power station to which the pumping and storage set belongs.
Further, the constraints of the generator set operation model are as follows:
ms i,t +x i,t,b ≤1 (8)
p i,t,b -pdr i,t,b ≥p i,min x i,t,b (9)
p i,t,b +pur i,t,b ≤p i,max x i,t,b (10)
0≤pdr i,t,b ≤p i,max x i,t,b (11)
0≤pur i,t,b ≤p i,max x i,t,b (12)
HE hp,t,min ≤HE hp,t +HC hp,t ≤HE hp,t,max (16)
wherein b is the number of the load segment; n (N) b Representing the total number of load segments; x is x i,t,b 0-1 variable representing start-stop state of unit and start-upTaking 1, and stopping 0; p is p i,t,b Representing the generating power of the unit; p is p g,min 、p g,max The minimum technical output and the installed capacity of the unit are respectively; pdr (p-dr) g,t,b 、pur g,t,b Downward standby and upward standby respectively available for the unit; hp represents the hydropower station number; d (D) t,b Representing the duration of period tstare b; HP (high pressure) hp,t,min Representing the forced output of the hydropower station; HP (high pressure) hp,t,max Representing the expected power of the hydropower station; h E hp,t,min Representing a lower limit of power distribution of the hydropower station; HE (HE) hp,t,max Representing the upper limit of the power distribution of the hydropower station; HC (HC) hp,t Representing the water discarding amount of the hydropower station; sp represents the pumping station number; p is p pump i,t,b Pumping power for the pumping and accumulating unit; η (eta) gene i 、η pump i Respectively the power generation efficiency and the pumping efficiency of the pumping and accumulating unit.
Further, constraints of the system operation model include power balance constraints, system standby constraints and power-on capacity constraints.
Further, constraints of the system operation model are as follows:
wherein N is g 、N h 、N q The number of the thermal power generating units, the hydroelectric generating units and the pumping and accumulating units is respectively; p is p r,t,b Representing new energy power generation; RE (RE) t,b Representing the expected electric quantity value of the new energy; RC (resistor-capacitor) t,b Representing the electric quantity of new energy waste; LC (liquid Crystal) device t,b Representing the load loss electric quantity; p is p min r,t,b 、p max r,t,b Respectively representing the lower limit and the upper limit of a new energy source dissipatable interval; ρ represents the power on standby coefficient.
Further, the long-term operation model in the electric power system takes the lowest total cost of system operation including thermal power fuel cost, water discarding, new energy discarding and load losing penalty as an objective function.
Further, the objective function is:
wherein, c i,t,b Representing the power generation cost of the thermal power generating unit; n (N) hp Representing the number of hydropower stations; lambda (lambda) HC 、λ RC 、λ LC And penalty coefficients of the discarded electric quantity, the discarded electric quantity of the new energy and the lost electric quantity are respectively represented.
An event-based genset overhaul scheduling system comprising:
the generator set overhaul scheduling model building module is used for building an event-based generator set overhaul scheduling model according to overhaul requirements of thermal power, hydroelectric power and pumped storage units in the electric power system;
the generator set operation model building module is used for building a generator set operation model according to the upper and lower output limits of the thermal power generation unit, the hydroelectric power generation unit, the pumped storage unit, the wind power generation unit and the upper and lower power generation unit limit of the hydropower station;
the system operation model building module is used for building a system operation model according to the system load demand;
the power system medium-long-term operation model building module is used for building the power system medium-long-term operation model based on the generator set maintenance arrangement model, the generator set operation model and the system operation model;
and the calculation module is used for solving the long-term running model in the power system to obtain the maintenance arrangement of the generator set in the calculation period and realize the maintenance of the generator set.
Compared with the existing method for overhauling and arranging the generator set, the method has the following beneficial effects:
the method establishes maintenance related constraints around the occurrence time and the occurrence process of the maintenance event based on the event characteristic of the maintenance of the generator set, can overcome the complexity of the maintenance problem of a large-scale system, and completely and accurately describes the maintenance problem of the generator set. The number of variables and constraint conditions in the generator set overhaul arrangement model established by the invention is small, the solving efficiency of the long-term operation model in the power system is effectively improved, and the generator set overhaul arrangement can be rapidly obtained, so that better support is provided for long-term optimization decision in the power system.
Furthermore, the invention can accurately and completely describe the complex constraint related to the overhaul of the generator set, and obtain an accurate overhaul scheme of the generator set, thereby realizing long-term stable operation in the power system and laying a foundation for solving the problem of optimizing operation of the power system.
Furthermore, the invention takes the optimal running economy of the electric power system as an objective function, establishes a medium-long running model taking into consideration constraints such as maintenance arrangement constraint of the generator set, running constraint of the system and the like, and further solves to obtain maintenance arrangement of the generator set so as to realize stable running of the electric power system.
Drawings
Fig. 1 is an overall flow chart of the present invention.
FIG. 2 is a schematic diagram of an event-based genset overhaul scheduling system.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1, the event-based generator set overhaul scheduling method of the present invention comprises the steps of:
step one: the collation data is collected. Collecting and arranging data such as thermal power generation cost of thermal power units, upper and lower output limits of thermal power units, hydroelectric power units, pumped storage units and wind power units, upper and lower power generation limits of hydropower stations, electric discarding and loss load punishment of new energy sources, overhaul requirements of thermal power units, hydroelectric power units and pumped storage units, system load requirements and the like in an electric power system.
Step two: according to maintenance requirements of thermal power, hydropower and pumped storage units in an electric power system, an event-based generator set maintenance scheduling model taking maintenance duration time constraint, maintenance interval time constraint, maintenance period constraint, maintenance resource constraint, maintenance time constraint and other constraints into consideration is established.
Wherein, formulas (1) - (3) represent maintenance duration constraints, formula (4) represents maintenance interval time constraints, formula (5) represents maintenance period constraints, formula (6) represents maintenance resource constraints, and formula (7) represents maintenance time constraints.
Wherein t represents a period number; t represents the total time period number in the calculation period; i represents the number of the unit; k represents the number of maintenance items; s is(s) i,t,k A 0-1 variable representing whether the overhaul project k is carried out by the unit i in the period t, if 1 is being carried out, otherwise, 0 is taken; m_duration i,k Representing the duration of the overhaul project k of the unit i; m_num i Indicating the overhaul times of the unit i; ms of i,t A 0-1 variable which indicates whether the unit i is overhauled in the period t, if so, taking 1, otherwise, taking 0; m_interval i,k Representing the minimum interval time between two adjacent overhauls of the unit;the starting time of a maintenance project k of the unit i is represented; />The starting time of a maintenance item k+1 of the unit i is represented; />Respectively representing upper and lower limits of an overhaul period interval of an overhaul project k of the unit i; gp represents the power plant number; m_resource gp Indicating the upper limit of the overhaul resources of the power plant.
Step three: and according to the unit operation requirements such as the upper and lower output limits of the thermal power unit, the hydroelectric power unit, the pumped storage unit, the upper and lower output limits of the generating capacity of the hydropower station and the like, a generator unit operation model is established, wherein the constraints such as unit startup constraint, output range constraint, unit standby constraint, hydropower station hydropower energy constraint of the hydropower station to which the hydroelectric unit belongs, pumping and generating energy balance constraint of the pumping and storage power station to which the pumping and storage unit belongs and the like are considered.
Wherein, formula (8) represents the unit start constraint, formulas (9) - (10) represent the unit output range constraint, formulas (11) - (12) represent the unit standby constraint, formulas (13) - (17) represent the water energy constraint of the hydropower station to which the hydropower unit belongs, and formula (18) represents the pumping and generating energy balance constraint of the pumping and accumulating power station to which the pumping and accumulating unit belongs.
ms i,t +x i,t,b ≤1 (8)
p i,t,b -pdr i,t,b ≥p i,min x i,t,b (9)
p i,t,b +pur i,t,b ≤p i,max x i,t,b (10)
0≤pdr i,t,b ≤p i,max x i,t,b (11)
0≤pur i,t,b ≤p i,max x i,t,b (12)
HE hp,t,min ≤HE hp,t +HC hp,t ≤HE hp,t,max (16)
Wherein b is the number of the load segment; n (N) b Representing the total number of load segments; x is x i,t,b A 0-1 variable representing the start-stop state of the unit, wherein 1 is taken when the unit is started, and 0 is taken when the unit is stopped; p is p i,t,b Representing the generating power of the unit; p is p g，min 、p g，max The minimum technical output and the installed capacity of the unit are respectively; pdr (p-dr) g，t，b 、pur g，t，b Downward standby and upward standby respectively available for the unit; hp represents the hydropower station number; d (D) t,b Representing period t load segment bDuration of time; HP (high pressure) hp,t,min Representing the forced output of the hydropower station; HP (high pressure) hp,t,max Representing the expected power of the hydropower station; HE (HE) hp,t,min Representing a lower limit of power distribution of the hydropower station; HE (HE) hp,t,max Representing the upper limit of the power distribution of the hydropower station; HC (HC) hp,t Representing the water discarding amount of the hydropower station; sp represents the pumping station number; p is p pump i,t,b Pumping power for the pumping and accumulating unit; η (eta) gene i 、η pump i Respectively the power generation efficiency and the pumping efficiency of the pumping and accumulating unit.
Step four: and according to the system load demand, establishing a system operation model taking into consideration constraints such as power balance constraint, electric quantity balance constraint, system standby constraint, startup capacity constraint and the like.
Wherein, formula (19) represents a power balance constraint, formula (20) represents a power balance constraint, formulas (21) - (22) represent system standby constraints, and formula (23) represents a power-on capacity constraint.
Wherein N is g 、N h 、N q The number of the thermal power generating units, the hydroelectric generating units and the pumping and accumulating units is respectively; p is p r,t,b Representing new energy power generation; RE (RE) t,b Representing the expected electric quantity value of the new energy; RC (resistor-capacitor) t,b Representing the electric quantity of new energy waste; LC (liquid Crystal) device t,b Representing the load loss electric quantity; p is p min r,t,b 、p max r,t,b Respectively representing the lower limit and the upper limit of a new energy source dissipatable interval; ρ represents the power on standby coefficient.
Step five: and establishing a long-term operation model in the power system.
According to the data such as the thermal power generating unit generating cost, the water discarding, the new energy discarding, the loss load penalty coefficient and the like in the electric power system, the system operation total cost including the thermal power fuel cost, the water discarding, the new energy discarding and the loss load penalty is taken as an objective function, a generator unit maintenance arrangement model which is established based on the step two and takes into consideration constraints such as maintenance duration constraints, maintenance interval time constraints, maintenance period constraints, maintenance resource constraints and maintenance time constraints, a generator unit operation model which is established in the step three and takes into consideration the unit startup constraints, the output range constraints and the unit standby constraints, and a system operation model which is established in the step four and takes into consideration the power balance, the electric quantity balance, the system standby constraints and the startup capacity constraints are established, and a long-term operation model in the electric power system is established. Wherein the model objective function is shown in formula (24).
Wherein, c i,t,b Representing the power generation cost of the thermal power generating unit; n (N) hp Representing the number of hydropower stations; lambda (lambda) HC 、λ RC 、λ LC And penalty coefficients of the discarded electric quantity, the discarded electric quantity of the new energy and the lost electric quantity are respectively represented.
Step six: and D, directly solving by adopting a Gurobi and other solvers according to the long-term running model in the power system established in the step five to obtain the maintenance arrangement of the generator set in a calculation period, and realizing the maintenance of the generator set.
Referring to fig. 2, an event-based genset overhaul scheduling system comprising:
the generator set overhaul scheduling model building module is used for building an event-based generator set overhaul scheduling model according to overhaul requirements of thermal power, hydroelectric power and pumped storage units in the electric power system;
the generator set operation model building module is used for building a generator set operation model according to the upper and lower output limits of the thermal power generation unit, the hydroelectric power generation unit, the pumped storage unit, the wind power generation unit and the upper and lower power generation unit limit of the hydropower station;
the system operation model building module is used for building a system operation model according to the system load demand;
the power system medium-long-term operation model building module is used for building the power system medium-long-term operation model based on the generator set maintenance arrangement model, the generator set operation model and the system operation model;
and the calculation module is used for solving the long-term running model in the power system to obtain the maintenance arrangement of the generator set in the calculation period and realize the maintenance of the generator set.
The following describes the process of the present method in one example.
The calculation example is exemplified by adapting IEEE-RTS1979, the study period is 1 year, and the week is taken as the basic time unit. The system comprises 26 thermal power units, 6 hydroelectric units and 4 pumped storage units, wherein each unit is overhauled for 3 or 4 weeks, and the number of the units overhauled by each power plant at most is 1.
Step one: and collecting the integer calculation example data.
Step two: according to the overhaul requirements of the thermal power, hydroelectric power and pumped storage unit in the calculation example, an event-based generator unit overhaul scheduling model taking into consideration the constraints of overhaul duration time constraint, overhaul interval time constraint, overhaul period constraint, overhaul resource constraint, overhaul time constraint and the like is established.
Step three: and according to the set operation requirements such as the upper and lower output limits of the thermal power set, the hydroelectric power set, the pumped storage set, the upper and lower output limits of the wind power set, the upper and lower power generation limits of the hydropower station and the like in the calculation example, a generator set operation model considering the constraints such as the start-up constraint, the output range constraint and the standby constraint of the set is established.
Step four: and according to the system load demand in the calculation example, establishing a system operation model taking into consideration constraints such as power balance, electric quantity balance, system standby constraint, startup capacity constraint and the like.
Step five: according to the generating cost of the thermal power generating unit, the data such as the water discarding, new energy discarding and load losing penalty coefficients and the like in the calculation example, the lowest total system operation cost including the thermal power fuel cost, the water discarding, new energy discarding and load losing penalty is taken as an objective function, according to the generating cost of the thermal power generating unit in the electric power system, the data such as the water discarding, new energy discarding and load losing penalty coefficients and the like are taken into consideration, a generator set maintenance scheduling model taking maintenance duration constraint, maintenance interval time constraint, maintenance period constraint, maintenance resource constraint, maintenance time constraint and other constraints into consideration is established based on the second step, a generator set operation model taking the unit startup constraint, output range constraint and unit standby constraint into consideration is established in the third step, and a system operation model taking the electric power balance, electric quantity balance, system standby constraint and startup capacity constraint into consideration is established in the fourth step, and a long-term operation model in the electric power system is established.
Step six: and directly solving the established long-term operation model in the power system by adopting a Gurobi and other solvers to obtain the maintenance arrangement of the generator set in one calculation period.
The calculation example data are shown in tables 1-3.
TABLE 1 thermal power generating unit related data
TABLE 2 data relating to hydroelectric generating sets
Table 3 pumped storage unit related data
The data of the calculation example are brought into a long-term operation model in the power system established by the invention to calculate, so that the overhaul arrangement of the thermal power unit, the hydroelectric unit and the pumping and accumulating unit is obtained, and the overhaul arrangement is shown in tables 4-6.
TABLE 4 thermal power generating unit maintenance arrangement
Table 5 hydroelectric generating set service arrangement
Table 6 maintenance arrangement for pumping and storage unit
According to the overhaul arrangement of the thermal power, hydroelectric and pumping and accumulating units shown in tables 4-6, reasonable overhaul of the generator set of the power system is realized.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, the protection scope of the present invention is not limited thereto, and any person skilled in the art may make equivalent substitutions or modifications according to the technical solution of the present invention and the inventive concept thereof within the scope of the present invention.

Claims (10)

1. An event-based method for scheduling maintenance of a generator set, comprising the steps of:
according to maintenance requirements of thermal power, hydroelectric power and pumped storage units in an electric power system, an event-based generator set maintenance scheduling model is established;
establishing a generator set operation model according to the upper and lower output limits of the thermal power generation unit, the hydroelectric power generation unit, the pumped storage unit, the wind power generation unit and the hydropower station power generation unit;
establishing a system operation model according to the system load demand;
based on the generator set maintenance arrangement model, the generator set operation model and the system operation model, establishing a long-term operation model in the power system;
and solving a long-term operation model in the power system to obtain the maintenance arrangement of the generator set in the calculation period, and realizing the maintenance of the generator set.
2. The event based genset service scheduling method of claim 1 wherein the constraints of the event based genset service scheduling model include a service duration constraint, a service interval time constraint, a service period constraint, a service resource constraint and a service time constraint.
3. An event based genset service scheduling method in accordance with claim 1 or 2 wherein the constraints of the event based genset service scheduling model are as follows:
wherein t represents a period number; t represents the total time period number in the calculation period; i represents the number of the unit; k represents the number of maintenance items; s is(s) i,t,k A 0-1 variable representing whether the unit i performs the maintenance item k in the period t; m_duration i,k Representing the duration of the overhaul project k of the unit i; m_num i Indicating the overhaul times of the unit i; ms of i,t A 0-1 variable which indicates whether the unit i is overhauled in the period t, if so, taking 1, otherwise, taking 0; m_interval i,k Representing the minimum interval time between two adjacent overhauls of the unit;the starting time of a maintenance project k of the unit i is represented; />The starting time of a maintenance item k+1 of the unit i is represented; />Respectively representing upper and lower limits of an overhaul period interval of an overhaul project k of the unit i; gp represents the power plant number; m_resource gp Indicating the upper limit of the overhaul resources of the power plant.
4. The event-based power generation unit overhaul scheduling method according to claim 1, wherein the constraints of the power generation unit operation model include unit start-up constraints, unit output range constraints, water energy constraints of a hydropower station to which a hydropower unit belongs and pumping and power generation energy balance constraints of a pumping and accumulating power station to which a pumping and accumulating unit belongs.
5. A method of event based genset service scheduling according to claim 1 or 4 wherein the constraints of the genset operation model are as follows:
ms i,t +x i,t,b ≤1 (8)
p i,t,b -pdr i,t,b ≥p i,min x i,t,b (9)
p i,t,b +pur i,t,b ≤p i,max x i,t,b (10)
0≤pdr i,t,b ≤p i,max x i,t,b (11)
0≤pur i,t,b ≤p i,max x i,t,b (12)
HE hp,t,min ≤HE hp,t +HC hp,t ≤HE hp,t,max (16)
wherein b is the number of the load segment; n (N) b Representing the total number of load segments; x is x i,t,b 0-1 variable, p, representing start-stop state of unit i,t,b Representing the generating power of the unit; p is p g，min 、p g，max The minimum technical output and the installed capacity of the unit are respectively; pdr (p-dr) g，t，b 、pur g，t，b Downward standby and upward standby respectively available for the unit; hp represents the hydropower station number; d (D) t,b Representing the duration of period tstare b; HP (high pressure) hp,t,min Representing the forced output of the hydropower station; HP (high pressure) hp,t,max Representing the expected power of the hydropower station; HE (HE) hp,t,min Representing a lower limit of power distribution of the hydropower station; HE (HE) hp,t,max Representing the upper limit of the power distribution of the hydropower station; HC (HC) hp,t Representing the water discarding amount of the hydropower station; sp represents the pumping station number; p is p pump i,t,b Pumping power for the pumping and accumulating unit; η (eta) gene i 、η pump i Respectively the power generation efficiency and the pumping efficiency of the pumping and accumulating unit.
6. The event based genset overhaul scheduling method of claim 1 wherein the constraints of the system operation model comprise power balance constraints, system standby constraints and power on capacity constraints.
7. An event based genset service scheduling method in accordance with claim 1 or 6 wherein the constraints of the system operational model are as follows:
wherein N is g 、N h 、N q The number of the thermal power generating units, the hydroelectric generating units and the pumping and accumulating units is respectively; p is p r,t,b Representing new energy power generation; RE (RE) t,b Representing the expected electric quantity value of the new energy; RC (resistor-capacitor) t,b Representing the electric quantity of new energy waste; LC (liquid Crystal) device t,b Representing the load loss electric quantity; p is p min r,t,b 、p max r,t,b Respectively representing the lower limit and the upper limit of a new energy source dissipatable interval; ρ represents the power on standby coefficient.
8. The event-based power generation unit overhaul scheduling method of claim 1, wherein the long-term operation model in the power system is based on a system operation total cost including thermal power fuel cost and water-abandoning, new energy-abandoning and load-losing penalties as an objective function.
9. The event based genset service scheduling method of claim 8 wherein the objective function is:
wherein, c i,t,b Representing the power generation cost of the thermal power generating unit; n (N) hp Representing the number of hydropower stations; lambda (lambda) HC 、λ RC 、λ LC Penalty coefficients respectively representing the abandoned water electric quantity, the new energy abandoned electric quantity and the lost load electric quantity; t is a period number; t is the total time period number in the calculation period; n (N) b Is the total number of load segments; b is the load segment number; n (N) g Is the number of thermal power generating units; i is the number of the unit; p is p i,t,b Generating power for the unit; n (N) hp The number of the hydropower stations; hp is the hydropower station number; HC (HC) hp,t Discarding water for the hydropower station; RC (resistor-capacitor) t,b Discarding electric quantity for new energy; LC (liquid Crystal) device t,b Is the loss of load electric quantity; d (D) t,b For the duration of period t load segment b.
10. An event-based genset overhaul scheduling system, comprising:
the generator set overhaul scheduling model building module is used for building an event-based generator set overhaul scheduling model according to overhaul requirements of thermal power, hydroelectric power and pumped storage units in the electric power system;
the generator set operation model building module is used for building a generator set operation model according to the upper and lower output limits of the thermal power generation unit, the hydroelectric power generation unit, the pumped storage unit, the wind power generation unit and the upper and lower power generation unit limit of the hydropower station;
the system operation model building module is used for building a system operation model according to the system load demand;
the power system medium-long-term operation model building module is used for building the power system medium-long-term operation model based on the generator set maintenance arrangement model, the generator set operation model and the system operation model;
and the calculation module is used for solving the long-term running model in the power system to obtain the maintenance arrangement of the generator set in the calculation period and realize the maintenance of the generator set.
CN202310483375.7A 2023-04-28 2023-04-28 Event-based generator set maintenance arrangement method and system Pending CN116526458A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117273413A (en) * 2023-11-23 2023-12-22 中国电建集团贵阳勘测设计研究院有限公司 Overhauling and arranging method for water-wind-solar-storage-base-regulated power supply unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117273413A (en) * 2023-11-23 2023-12-22 中国电建集团贵阳勘测设计研究院有限公司 Overhauling and arranging method for water-wind-solar-storage-base-regulated power supply unit
CN117273413B (en) * 2023-11-23 2024-02-06 中国电建集团贵阳勘测设计研究院有限公司 Overhauling and arranging method for water-wind-solar-storage-base-regulated power supply unit

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