A power generation dispatch monitoring and analysis system

Abstract

A power generation dispatch monitoring and analysis system includes: a power generation unit; a power generation dispatch unit; a data acquisition unit; a data verification unit; a modeling unit; a power generation dispatch monitoring and analysis model; and an analysis report unit. The present invention comprehensively considers factors such as the power generation capacity, maintenance plan, regional load conditions, and transactions of the units in dispatch operation, and establishes a more comprehensive power generation dispatch monitoring and analysis model, which has strong guidance for the dispatch plan arrangement work of the next dispatch cycle.

Description

Technical Field

[0001] The invention belongs to the technical field of power system operation dispatching, and in particular relates to a power generation dispatching monitoring and analysis system. Background Art

[0002] At present, China's economy is shifting from high-speed growth to medium-high-speed growth, with obvious structural adjustment characteristics. According to data released by the National Bureau of Statistics, China's GDP grew by 7.4% year-on-year in 2014, and the GDP growth rate for the whole year of 2014 is expected to be around 7.1%. The resulting growth rate of electricity demand has generally shown a trend of fluctuation and decline, and the growth rate of electricity consumption in August 2014 even showed the first "negative growth" (-1.5%) of the year. Under this development trend, in order to continuously improve the economic benefits of power grid operation, it is necessary to tap internal potential and find room for optimization and improvement of power grid operation.

[0003] At the same time, the operation and control of the power system is becoming increasingly difficult. After years of development, the power system has more interconnected levels, stronger electrical connections, and more complex grid operation characteristics. In addition, AC / DC hybrid has increased the difficulty of grid operation and control. The number of large-scale power generation bases has continued to increase, the number of synchronously operated equipment and users has increased significantly, and the exchange power has increased significantly. These factors have exacerbated the variability of grid operation conditions and trends. In order to cope with the above situation, it is necessary to monitor and evaluate various dispatching strategies of the power dispatching center, so as to find the weak links that limit the lean level of grid dispatching and promote the gradual improvement of the lean level of system operation. Summary of the invention

[0004] In order to fill the gap in the prior art, the present invention provides a power generation scheduling monitoring and analysis system, comprising:

[0005] A power generation unit, used for generating electricity;

[0006] Multi-level dispatch optimization unit, used to coordinate and optimize national, local and provincial dispatch plans;

[0007] A power generation dispatching unit, used to implement power generation dispatching according to the coordinated and optimized power generation dispatching plan;

[0008] A data acquisition unit, used to acquire multi-cycle data of the power generation scheduling unit;

[0009] A data verification unit, used to verify multi-cycle data of the power generation scheduling unit;

[0010] Modeling unit, used to establish a power generation dispatch monitoring and analysis model;

[0011] A power generation dispatch monitoring and analysis model, used to perform data analysis on the multi-cycle data according to a preset analysis indicator system;

[0012] The analysis report unit is used to generate an analysis report based on the data analysis results.

[0013] Compared with the prior art, the technical solution provided by the present invention has the following excellent effects: firstly, by establishing a power generation dispatching monitoring and analysis model, the present invention proposes a method for analyzing the degree of completion of the power generation dispatching unit plan in the whole cycle, thereby improving the scientific nature of the evaluation of the completion progress of the power generation dispatching unit plan; secondly, the present invention comprehensively considers the power generation capacity, maintenance plan, regional load situation, transaction and other factors of the units in dispatching operation, establishes a more comprehensive power generation dispatching monitoring and analysis model, and has strong guidance for the dispatching plan arrangement work of the next dispatching cycle; finally, the present invention combines the characteristics of the dispatching plan business processing at the national, sub- and provincial levels, and proposes a method based on The multi-level dispatch optimization unit of the national dispatch, branch dispatch and provincial dispatch is integrated with the headquarters and the departments. The national dispatch and branch dispatch combine the national, branch and provincial panoramic dispatch plan information and their respective submitted goals and constraints, and perform integrated optimization calculations within the scope of national and branch dispatch. If the constraints of the national branch dispatch conflict, the national dispatch will make overall adjustments; after the national branch dispatch plan is determined, it will be sent to the provincial dispatch as its boundary conditions. When the provincial dispatch finds that there are constraints that cannot be adjusted by itself, it will be fed back to the national branch dispatch link for overall adjustment; in particular, the characteristics of the national, branch and provincial dispatch are fully considered, and targeted objective functions and constraints are designed to achieve the most optimized dispatch needs. The national and branch integrated dispatch optimization method reduces the repeated iterations of the current national, branch and provincial serial iteration method to prepare dispatch plans, and enhances the ability of coordinated dispatch between the national, branch and provincial multi-level dispatch and the effect of resource overall optimization. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 System framework diagram of the present invention DETAILED DESCRIPTION

[0015] In order to better understand the present invention, the system of the present invention is further explained below with reference to the description of the embodiments in combination with the accompanying drawings.

[0016] In order to fully understand the present invention, many specific details are mentioned in the following detailed description. However, it should be understood by those skilled in the art that the present invention can be implemented without these specific details. In the embodiments, well-known methods, processes, components are not described in detail to avoid making the embodiments unnecessarily cumbersome.

[0017] See also Figure 1 As shown, the present invention provides a power generation scheduling monitoring and analysis system, comprising:

[0018] A power generation unit, used for generating electricity;

[0019] Multi-level dispatch optimization unit, used to coordinate and optimize national, local and provincial dispatch plans;

[0020] A power generation dispatching unit, used to implement power generation dispatching according to the coordinated and optimized power generation dispatching plan;

[0021] A data acquisition unit, used to acquire multi-cycle data of the power generation scheduling unit;

[0022] A data verification unit, used to verify multi-cycle data of the power generation scheduling unit;

[0023] Modeling unit, used to establish a power generation dispatch monitoring and analysis model;

[0024] A power generation dispatch monitoring and analysis model, used to perform data analysis on the multi-cycle data according to a preset analysis indicator system;

[0025] The analysis report unit is used to generate an analysis report based on the data analysis results.

[0026] Preferably, the power generation scheduling monitoring and analysis model is used to perform data analysis on the power generation scheduling unit, specifically including data analysis on the degree of completion of the power generation scheduling plan.

[0027] Preferably, the multi-cycle data of the power generation dispatching unit specifically includes:

[0028] Basic power generation information, including power generation unit ID, power generation unit name, power generation unit type, unit installed capacity and unit capacity level;

[0029] Dispatch information, including the province, dispatching agency, power generation group, unit generation dispatch identification, and unit energy utilization type;

[0030] Daily power generation information, including the reporting date, reported maximum output, shutdown standby category, shutdown standby description, maintenance category, maintenance level, upper limit blocked power, upper limit blocked category, reported minimum output, lower restricted power, lower restricted category, shutdown power, maintenance power, blocked power, actual power generation, planned output and actual output of the units under the power generation unit;

[0031] Monthly power generation information, including the monthly maximum adjustable power accumulation of the units under the power generation unit, the monthly maximum power accumulation, the monthly shutdown power accumulation, the monthly maintenance power accumulation, the monthly blocked power accumulation, the monthly actual power generation, the monthly actual maximum and minimum outputs, and the monthly actual base power of the power generation unit;

[0032] Annual power generation information, including the annual planned electricity of the power generation unit, the annual planned adjusted electricity, the annual planned electricity adjustment information, the annual maximum adjustable electricity accumulation, the annual maximum power generation accumulation, the annual shutdown electricity accumulation, the annual maintenance electricity accumulation, the annual obstructed electricity accumulation, the annual actual power generation, the annual actual maximum and minimum outputs, and the annual actual base electricity of the power generation unit.

[0033] Preferably, the data verification unit is used to verify the multi-cycle data of the power generation scheduling unit, specifically including data integrity verification, timeliness verification, accuracy verification and consistency verification.

[0034] Preferably, the multi-level dispatch optimization unit is used to coordinate and optimize the national, local and provincial dispatch plans, specifically including:

[0035] Basic data preparation unit, used for national survey preparation, regional survey preparation and provincial survey preparation;

[0036] The compilation unit is used to compile the constraints and boundary conditions of the national, sub-district and provincial governments respectively: the national, sub-district and provincial governments compile their own constraints, targets and boundary conditions based on the panoramic information of the national and provincial dispatching plans of the large power grid;

[0037] The overall planning unit is used for the national survey to make overall calculations of the national survey plans based on the panoramic information;

[0038] The optimization unit is used for iterative adjustment between the national dispatching system and the provincial dispatching system to achieve multi-level dispatching optimization: the results of the overall planning calculation by the overall planning unit are sent to each provincial dispatching system as the boundary conditions for each provincial dispatching system to prepare its own dispatching plan;

[0039] If there is a constraint conflict between the national and provincial plans, the national and provincial plans will be adjusted. If the constraint conflict cannot be resolved, the provincial plan will report the corresponding constraints to the national plan and return them to the overall planning unit. The national plan will consider this part of the constraints and perform iterative calculations until there is no constraint conflict between the national and provincial plans.

[0040] The display unit is used for result display and return: the calculated integrated multi-level dispatch optimization results of the headquarters and departments are returned to the national, branch and provincial dispatching agencies.

[0041] Preferably, the basic data includes power grid model, equipment parameters, unit operation parameters, maintenance plan, power plan, various types of constraint information, etc.

[0042] Preferably, the basic data preparation unit is specifically used for:

[0043] National dispatch preparation: The basic data involved include medium- and long-term electricity plans for DC cross-regional transactions, DC channel power transmission capacity, DC channel power outage and maintenance plans, direct dispatch unit operation constraints, and direct dispatch unit maintenance plans.

[0044] Preparation for dispatching: The basic data preparation involved includes operating constraints of direct dispatching units, maintenance plans of direct dispatching units, cross-provincial section limits, direct main grid power outage maintenance plans, and medium- and long-term electricity plans for inter-provincial interconnection lines.

[0045] Provincial dispatch preparation: The basic data preparation involved includes basic unit parameters, unit maintenance plan, unit operation constraints, power progress balance range, large-user direct supply transactions, power balance constraints, power grid safety constraints, power grid outage maintenance plan, and clean energy power generation forecast.

[0046] Preferably, the overall planning unit is used for the national survey to perform overall planning calculations on the national survey plans based on the panoramic information, specifically including:

[0047] Objective function setting unit, used to set the objective function:

[0048] With the optimization goals of the national and local dispatching agencies as the goal,

[0049]

[0050] Among them, Minimize means the lowest, and the constant N G is the number of generator sets, N T is the time period number, i is the unit number, t is the time period number, P i (t) is the active power output of unit i during period t, B i (P i (t), t) is the cost of the i-th generator in the t-th period of the national and sub-dispatching agencies;

[0051] A constraint condition setting unit, used for setting constraint conditions;

[0052] The calculation unit is used to carry out the overall calculation of the national adjustment plan according to the objective function and constraints.

[0053] Preferably, the constraint condition setting unit is used to set the constraint condition, specifically including:

[0054] The balance constraint setting unit is used to set the national and local power balance constraints:

[0055]

[0056] Among them, N G is the number of units, P i (t) is the active output of unit i during period t, u i (t) is the start and stop status of unit i in period t, P load (t) is the system load forecast for period t;

[0057] The backup constraint setting unit is used to set the national and branch backup constraints:

[0058]

[0059]

[0060] in, and are positive and negative standby requirements, P i (t) is the lower limit of the output of unit i in time period t, is the upper limit of the output of unit i in period t;

[0061] Output constraint setting unit, used to set the output constraints of national and sub-dispatching units:

[0062]

[0063] The climbing constraint setting unit is used to set the climbing constraints of the national and sub-dispatching units:

[0064] P i (t)-P i (t-1)≤P i up (t),u i (t)=1&u i (t-1)=1 (6)

[0065] P i (t-1)-P i (t)≤P i down (t),u i (t)=1&u i (t-1)=1 (7)

[0066] Among them, P i up (t) and P i down (t) is the upper and lower limits of the ramp rate of unit i in time period t.

[0067] The time constraint setting unit is used to set the minimum operating time and minimum shutdown time constraints of the national and sub-dispatching units:

[0068]

[0069]

[0070] in, and are the minimum operating time and minimum downtime of unit i in period t, respectively;

[0071] Security constraint setting unit, used to set national and sub-network security constraints:

[0072]

[0073]

[0074] Among them, P line (t) is the power flow value of the transmission line in period t, and They are the minimum and maximum limits of branch or section power flow respectively.

[0075] Compared with the prior art, the technical solution provided by the present invention has the following excellent effects: firstly, by establishing a power generation dispatching monitoring and analysis model, the present invention proposes a method for analyzing the degree of completion of the power generation dispatching unit plan in the whole cycle, thereby improving the scientific nature of the evaluation of the completion progress of the power generation dispatching unit plan; secondly, the present invention comprehensively considers the power generation capacity, maintenance plan, regional load situation, transaction and other factors of the units in dispatching operation, establishes a more comprehensive power generation dispatching monitoring and analysis model, and has strong guidance for the dispatching plan arrangement work of the next dispatching cycle; finally, the present invention combines the characteristics of the dispatching plan business processing at the national, sub- and provincial levels, and proposes a method based on The multi-level dispatch optimization unit of the national dispatch, branch dispatch and provincial dispatch is integrated with the headquarters and the departments. The national dispatch and branch dispatch combine the national, branch and provincial panoramic dispatch plan information and their respective submitted goals and constraints, and perform integrated optimization calculations within the scope of national and branch dispatch. If the constraints of the national branch dispatch conflict, the national dispatch will make overall adjustments; after the national branch dispatch plan is determined, it will be sent to the provincial dispatch as its boundary conditions. When the provincial dispatch finds that there are constraints that cannot be adjusted by itself, it will be fed back to the national branch dispatch link for overall adjustment; in particular, the characteristics of the national, branch and provincial dispatch are fully considered, and targeted objective functions and constraints are designed to achieve the most optimized dispatch needs. The national and branch integrated dispatch optimization method reduces the repeated iterations of the current national, branch and provincial serial iteration method to prepare dispatch plans, and enhances the ability of coordinated dispatch between the national, branch and provincial multi-level dispatch and the effect of resource overall optimization.

[0076] Only preferred embodiments of the present invention are described herein, but are not intended to limit the scope, applicability and configuration of the present invention. On the contrary, the detailed description of the embodiments enables those skilled in the art to implement. It should be understood that some details may be appropriately changed and modified without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A power generation dispatch monitoring and analysis system, characterized in that: include: A power generation unit, used for generating electricity; Multi-level dispatch optimization unit, used to coordinate and optimize national, local and provincial dispatch plans; A power generation dispatching unit, used to implement power generation dispatching according to the coordinated and optimized power generation dispatching plan; A data acquisition unit, used to acquire multi-cycle data of the power generation scheduling unit; A data verification unit, used to verify multi-cycle data of the power generation scheduling unit; Modeling unit, used to establish a power generation dispatch monitoring and analysis model; A power generation dispatch monitoring and analysis model, used to perform data analysis on the multi-cycle data according to a preset analysis indicator system; An analysis report unit, used to generate an analysis report based on data analysis results; The multi-level dispatch optimization unit is used to coordinate and optimize the national, local and provincial dispatch plans, including: Basic data preparation unit, used for national survey preparation, regional survey preparation and provincial survey preparation; The compilation unit is used to compile the constraints and boundary conditions of the national, sub-district and provincial governments respectively: the national, sub-district and provincial governments compile their own constraints, targets and boundary conditions based on the panoramic information of the national and provincial dispatching plans of the large power grid; The overall planning unit is used for the national survey to make overall calculations of the national survey plans based on the panoramic information; The optimization unit is used for iterative adjustment between the national dispatching system and the provincial dispatching system to achieve multi-level dispatching optimization: the results of the overall planning calculation by the overall planning unit are sent to each provincial dispatching system as the boundary conditions for each provincial dispatching system to prepare its own dispatching plan; If there is a constraint conflict between the national and provincial plans, the national and provincial plans will be adjusted. If the constraint conflict cannot be resolved, the provincial plan will report the corresponding constraints to the national plan and return them to the overall planning unit. The national plan will consider this part of the constraints and perform iterative calculations until there is no constraint conflict between the national and provincial plans. Display unit, used for result display and return: returning the calculated headquarter-department integrated multi-level dispatch optimization results to the national, branch and provincial dispatch agencies; The overall planning unit is used for the national survey to carry out overall planning calculation of the national survey plan based on the panoramic information, specifically including: Objective function setting unit, used to set the objective function: With the optimization goals of the national and local dispatching agencies as the goal, Minimize: Among them, Minimize means the lowest, and the constant N G is the number of generator sets, N T is the time period number, i is the unit number, t is the time period number, P i (t) is the active power output of unit i during period t, B i (P i (t), t) is the cost of the i-th generator in the t-th period of the national and sub-dispatching agencies; A constraint condition setting unit, used for setting constraint conditions; The calculation unit is used to carry out the overall calculation of the national adjustment plan according to the objective function and constraints.

2. The system according to claim 1, wherein: The power generation scheduling monitoring and analysis model is used to perform data analysis on the power generation scheduling unit, specifically including data analysis on the degree of completion of the power generation scheduling plan.

3. The system according to claim 1, wherein: The multi-cycle data of the power generation dispatching unit specifically includes: Basic power generation information, including power generation unit ID, power generation unit name, power generation unit type, unit installed capacity and unit capacity level; Dispatch information, including the province, dispatching agency, power generation group, unit generation dispatch identification, and unit energy utilization type; Daily power generation information, including the reporting date, reported maximum output, shutdown standby category, shutdown standby description, maintenance category, maintenance level, upper limit blocked power, upper limit blocked category, reported minimum output, lower restricted power, lower restricted category, shutdown power, maintenance power, blocked power, actual power generation, planned output and actual output of the units under the power generation unit; Monthly power generation information, including the monthly maximum adjustable power accumulation of the units under the power generation unit, the monthly maximum power accumulation, the monthly shutdown power accumulation, the monthly maintenance power accumulation, the monthly blocked power accumulation, the monthly actual power generation, the monthly actual maximum and minimum outputs, and the monthly actual base power of the power generation unit; Annual power generation information, including the annual planned electricity of the power generation unit, the annual planned adjusted electricity, the annual planned electricity adjustment information, the annual maximum adjustable electricity accumulation, the annual maximum power generation accumulation, the annual shutdown electricity accumulation, the annual maintenance electricity accumulation, the annual obstructed electricity accumulation, the annual actual power generation, the annual actual maximum and minimum outputs, and the annual actual base electricity of the power generation unit.

4. The system according to claim 1, wherein: The data verification unit is used to verify the multi-cycle data of the power generation scheduling unit, specifically including data integrity verification, timeliness verification, accuracy verification and consistency verification.

5. The system according to claim 1, wherein: The basic data includes power grid model, equipment parameters, unit operating parameters, maintenance plan, power plan, various constraint information, etc.

6. The system according to claim 1, wherein: The basic data preparation unit is specifically used for: National dispatch preparation: The basic data involved include medium- and long-term DC cross-regional transaction power plan, DC channel power transmission capacity, DC channel power outage maintenance plan, direct dispatch unit operation constraints, and direct dispatch unit maintenance plan; Preparation for dispatching: The basic data involved include operation constraints of direct dispatching units, maintenance plans of direct dispatching units, cross-provincial section limits, power outage maintenance plans of direct main grids, and medium- and long-term power plans of inter-provincial interconnection lines; Provincial dispatch preparation: The basic data preparation involved includes basic unit parameters, unit maintenance plan, unit operation constraints, power progress balance range, direct supply transactions to large users, power balance constraints, power grid safety constraints, power grid outage maintenance plan, and clean energy power generation forecast.

7. The system according to claim 1, wherein: The constraint condition setting unit is used to set the constraint conditions, specifically including: The balance constraint setting unit is used to set the national and local power balance constraints: Among them, N G is the number of units, P i (t) is the active output of unit i during period t, u i (t) is the start and stop status of unit i in period t, P load (t) is the system load forecast for period t; The backup constraint setting unit is used to set the national and branch backup constraints: in, and are positive and negative standby requirements, P i (t) is the lower limit of the output of unit i in time period t, is the upper limit of the output of unit i in period t; Output constraint setting unit, used to set the output constraints of national and sub-dispatching units: The climbing constraint setting unit is used to set the climbing constraints of the national and sub-dispatching units: in, and are the upper and lower limits of the ramp rate of unit i in time period t; The time constraint setting unit is used to set the minimum operating time and minimum shutdown time constraints of the national and sub-dispatching units: in, and are the minimum operating time and minimum downtime of unit i in period t, respectively; Security constraint setting unit, used to set national and sub-network security constraints: Among them, P line (t) is the power flow value of the transmission line in period t, and They are the minimum and maximum limits of branch or section power flow respectively.

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