CN112003329B - Thermal power generating unit peak regulation and control method and system based on global energy consumption optimization - Google Patents
Thermal power generating unit peak regulation and control method and system based on global energy consumption optimization Download PDFInfo
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Abstract
A thermal power generating unit peak regulation and control method and system based on global energy consumption optimization, a power grid needing peak regulation and control is divided into different block areas; counting loads, new energy stations and thermal power generating units in the divided block areas, and marking coordinates; calculating the weighted positions of the generated output of the thermal power generating unit and the new energy station; comparing the electrical load with the generated energy in the block area, and marking the block area with peak shaving resources; when peak regulation is needed in the block area, the thermal power generating units in the block area firstly participate in peak regulation, the sequence of the peak regulation is in the sequence from far to near with the load power utilization weighting position, and when all the thermal power generating units in the block area participate in the peak regulation and cannot meet the requirement, other block areas are searched for peak regulation resources; the load electricity demand, the thermal power unit output and the new energy station output are all dynamically updated, and the weighting position is also dynamically updated. The invention improves the economy of the whole power utilization and simultaneously ensures the safety and stability of the power grid.
Description
Technical Field
The invention belongs to the technical field of power grid energy consumption optimization, and relates to a thermal power unit peak regulation and control method and system based on global energy consumption optimization.
Background
Renewable energy sources such as wind power and thermal power are rapidly developed in installed scale, the preferential power generation position of renewable energy charge power generation is determined by relevant national policies, and meanwhile, in order to ensure real-time balance of electric power, a thermal power generating unit needs to provide peak regulation auxiliary service to support power grid peak regulation. At present, the peak regulation of the thermal power generating unit mainly depends on the peak regulation demand of a provincial power grid or a block region power grid in a whole province or a block region to determine the peak regulation unit combination, namely the whole regulation space of the thermal power generating unit needs to adapt to the electricity utilization load of the whole power grid and the electricity generation output of a new energy station.
The method has the advantages that the problem of poor economy in power supply and demand is solved in the overall power generation, transmission and distribution links, and the geographic position of renewable power generation, the loss of a power transmission line and the change of power load requirements are not considered in the determination of the peak regulation combination of the thermal power generating unit.
(1) When the renewable energy power generation in the block region needs power grid peak shaving, the unit peak shaving combination is uniformly allocated in the block region, so that the situation that the peak shaving resource is provided remotely to cause the integral transmission line loss in the block region to increase may exist;
(2) when the power generation output of the renewable energy sources is rapidly increased, the power loads of different block areas show different change trends, and the peak load regulation requirement is considered due to the change of the power loads in the whole block area, so that the long-distance power transmission condition can be caused, and the overall economy is reduced.
When the current power grid is subjected to peak regulation, the main purpose is provincial regulation, when a new energy station generates electricity, the provincial regulation arranges certain power plant peak regulation according to operation experience, and when the new energy station generates electricity and the full-provincial power load is at a lower level, all units in a province participate in the peak regulation, so that the power balance is ensured. Although the scheme ensures the consumption of the new energy station and reduces the consumption of coal power generation and the like, the situation of long-distance power supply transmission and unnecessary transmission and distribution loss are easy to occur without considering the load and the regional attributes of various types of power supplies.
The invention provides a local optimization scheme from the power flow optimization perspective of the power system, and fully considers the regional attributes of main power supplies such as new energy field stations, thermal power plants and the like and power grid loads.
Prior art 1(Bai L, Li F, Cui H, et al. Interval optimization based optimization for gas-electric integrated Energy systems coherent optimization response and wind uncertainties [ J ]. Applied Energy,2016,167(apr.1): 270. 279.) has proposed an operation strategy of an electric-gas combined network optimized in an interval considering demand response and wind-electricity uncertainty.
In the prior art 2 (huangjun. comprehensive energy system multi-target optimization operation algorithm research [ D ]. south china university, 2019.) huangjun researches simple power grid trend optimization to a complex micro-grid-containing electricity-gas combined network, comprehensively coordinates and optimizes a source-network-load whole energy system, and realizes overall economic optimization and optimal environmental protection.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide a thermal power unit peak regulation control method based on global energy consumption optimization, and peak regulation combination optimization scheduling of the thermal power unit is realized based on comprehensive consideration of conditions such as thermal power unit output, load side application requirements, new energy station power generation conditions and the like.
The invention adopts the following technical scheme:
a thermal power generating unit peak regulation and control method based on global energy consumption optimization comprises the following steps:
step 1: dividing a power grid needing peak regulation into different block areas;
step 2: marking thermal power generating units and new energy field stations used for peak shaving according to geographic coordinates and generated energy, and collecting geographic coordinates and output sizes of all thermal power generating units and new energy field stations in the divided block areas, and positions and sizes of power loads;
and step 3: calculating weighted output positions corresponding to power generation of the thermal power generating unit and the new energy station according to the geographical coordinates and the output sizes of the thermal power generating unit and the new energy station with the peak shaving obtained in the step 2, and calculating the weighted positions of the power loads by using the positions and the sizes of the power loads;
and 4, step 4: comparing the total power load in the partitioned block regions in the step 1 with the output of the thermal power generating unit and the new energy field station, when the total power load in the partitioned block regions is larger than or equal to the sum of the minimum output which can be achieved by all the thermal power generating units and the total output of the new energy field station, marking the block regions with the peak regulation resources, and when the total power load in the partitioned block regions is smaller than the sum of the total output of the thermal power generating unit and the total output of the new energy field station, marking the block regions needing the peak regulation;
and 5: according to step 4, when peak shaving is required in the block area, the peak shaving principle is as follows: the thermal power generating units in the block area firstly participate in peak regulation, the sequence of the peak regulation is ordered according to the distance between the thermal power generating units and the load electricity utilization weighting position, namely, the thermal power generating unit with the largest distance between the thermal power generating units and the load weighting position firstly participates in the peak regulation and is reduced to the minimum output of the thermal power generating units, then other units are arranged to participate in the peak regulation according to the principle, when all the thermal power generating units in the block area participate in the peak regulation and can not meet the requirement, other block areas are searched for peak regulation resources, when other block area peak regulation resources are searched, the other block area peak regulation resources are selected according to the distance, and whether the peak regulation requirement is met is measured in real time; when a plurality of block areas need peak shaving, calculating the contents including coordinates of the block areas, and considering the contents as a whole;
step 6: comparing the difference value between the electric load and the station output of the new energy field in the partitioned areas divided in the step 1 with the minimum output of the thermal power generating unit in real time;
when the difference value between the electric load in the divided block area and the output force of the new energy field is smaller than the minimum output force of the thermal power generating unit, seeking peak regulation resources of the nearby block area, arranging peak regulation of the thermal power generating unit according to the distance between the thermal power generating unit and the block area, namely, firstly reducing the load of the thermal power generating unit with the largest distance between the thermal power generating unit and the block area, returning to the step 5, seeking a peak regulation space of the nearby area to continuously regulate the peak;
and 7: and when the difference value between the power load and the output of the new energy field in the divided block areas is larger than or equal to the minimum output of the thermal power unit, peak regulation is continued, the power load, the output of the thermal power unit and the output of the new energy field are dynamically updated according to the predicted or actual operation condition, and the weighted output positions corresponding to power generation of the thermal power unit and the new energy field and the weighted positions of the power load are dynamically updated.
In the step 1, when the absolute value of the difference between the average power load in the set time period in the block region and the total generated output in the block region is less than or equal to the difference between the maximum load and the minimum load in the set time period, the region is divided into one block region.
In step 1, the system is divided into administrative areas.
In the step 3, the number of thermal power generating units in the block area is m, and the coordinates of the thermal power generating units are (x)1,y1) (x2,y2)…(xi,yi)…(xm,ym) Wherein the coordinates are calibrated according to longitude and latitude, and the output of each thermal power generating unit is H1……HmAnd the corresponding weighted output position (x) of the thermal power generating unitH,yH) The method comprises the following steps:
obtaining the minimum output which can be achieved by all thermal power generating units in the block area by using the historical operating data of the units
Wherein,
is the total output of the thermal power generating unit HminMinimum output, H, for all thermal power unitsi,minAnd the value of i is from 1 to m for the minimum output which can be achieved by the ith thermal power generating unit.
And taking the minimum stable operation output of the thermal power generating unit in the historical operation process as the minimum output.
The time for stable operation of the thermal power generating unit in the historical operation process is more than or equal to 2 hours.
In the step 3, the weighted output position (x) corresponding to the new energy stationF,yF) The method comprises the following steps:
wherein the total output of the new energy station is
The value of i of the ith new energy station is from 1 to n, n is the total number of the new energy stations, and the output position corresponding to the ith new energy station is (x'i,y′i) The output of each new energy station is F1……Fn。
In step 3, the weighted positions of the electrical loads are:
wherein, the position corresponding to the ith electric load is (x ″)i,y″i) The ith electrical load is QiI is 1 to q, q is the total number of the electric loads, and the total electric load in the block area is
In the step 4, when
Then, the peak regulation is needed in the block area;
when in use
When the output of the thermal power generating unit in the block area is reduced to the minimum value, the peak regulation requirement cannot be met, and other block areas are required to provide peak regulation resources;
when the temperature is higher than the set temperature
And then, the set in the block area can meet the peak regulation requirement and has the capability of providing peak regulation resources for other block areas.
In the step 5, the power load, the output of the thermal power generating unit and the output of the new energy field station are updated in real time, and when the output of the new energy in the whole regulation and control block area can be completely consumed and the electric quantity is balanced, the peak regulation requirement is met.
In the step 6, the number of thermal power generating units in the block area is m, and the coordinate is (x)1,y1) (x2,y2)…(xi,yi)…(xm,ym) At the moment t, the output of the thermal power generating unit is respectively H1(t)……Hm(t), the corresponding weighted output position (x) of the thermal power generating unit at the moment tH(t),yH(t)) should be:
obtaining the minimum output which can be achieved by all thermal power generating units in the block area at the time t by utilizing the historical operating data of the thermal power generating units
Wherein,
for total output of thermal power generating unit at time t, Hmin(t) is the minimum output that can be achieved by all thermal power generating units at time t, Hi,minAnd (t) is the minimum output which can be achieved by the ith thermal power generating unit at the moment t.
In the step 6, at the time t, the new energy station generates the corresponding weighted output position (x)F(t),yF(t)) should be:
wherein the total output of the new energy station at the moment t is
The value of i of the ith new energy station is from 1 to n, n is the total number of the new energy stations, and the output position corresponding to the ith new energy station is (x'i,y′i) And the generated output of each new energy field station at the moment t is respectively F1(t)……Fn(t)。
In step 6, at time t, the weighted position corresponding to the load should be:
wherein, the position corresponding to the ith electric load is (x ″)i,y″i) At time t, the ith electrical load is Qi(t), i takes the value of 1 to q, q is the total number of the electric loads, and the total electric load in the block area at the time t is
In the step 7, the power load and the power output of the new energy field are predicted, and the peak regulation means of the thermal power generating unit is prearranged by combining the prediction function.
A regulating and controlling system of a thermal power generating unit peak regulation and controlling method based on global energy consumption optimization comprises a block region dividing module, a thermal power generating unit minimum output calculating module, a weighted output position and weighted position calculating module, a peak regulation resource block region marking module, a peak regulation module, a real-time comparison module and a dynamic updating module,
the block area division module divides the power grid needing peak regulation into different block areas;
the thermal power generating unit minimum output calculating module is used for counting the electrical load, the new energy field station and the thermal power generating units in the divided block areas, marking the thermal power generating units and the new energy field stations used for peak regulation according to geographic coordinates and power generation quantity, and acquiring the geographic coordinates and output quantities of all the thermal power generating units and the new energy field stations in the divided block areas as well as the positions and the sizes of the electrical load;
the weighted output position and weighted position calculation module calculates the weighted output positions corresponding to power generation of the thermal power generating unit and the new energy field station according to the obtained geographical coordinates and output sizes of the thermal power generating unit and the new energy field station with peak shaving, and calculates the weighted positions of the power loads by using the positions and sizes of the power loads;
the peak regulation resource block area marking module compares the total power load in the divided block areas with the output of the thermal power generating units and the new energy field station, when the total power load in the divided block areas is more than or equal to the sum of the minimum output which can be reached by all the thermal power generating units and the total output of the new energy field station, the block areas are marked as block areas with peak regulation resources, and when the total power load in the divided block areas is less than the sum of the total output of the thermal power generating units and the total output of the new energy field station, the block areas are marked as block areas needing peak regulation;
when the peak regulation module needs peak regulation in the block area, the peak regulation principle is as follows: the thermal power generating units in the block area firstly participate in peak regulation, the sequence of the peak regulation is ordered according to the distance between the thermal power generating units and the load electricity utilization weighting position, namely, the thermal power generating unit with the largest distance between the thermal power generating units and the load electricity utilization weighting position firstly participates in the peak regulation and is reduced to the minimum output of the thermal power generating units, then other units are arranged to participate in the peak regulation according to the principle, when all the thermal power generating units in the block area participate in the peak regulation and cannot meet the requirement, other block areas are searched for peak regulation resources, when other block areas are searched for the peak regulation resources, the other block areas are selected according to the distance, and whether the peak regulation requirement is met is measured in real time;
the real-time comparison module compares the difference value between the electric load and the station output of the new energy field in the divided block areas with the minimum output of the thermal power generating unit in real time;
when the difference value between the electric load in the partitioned block area and the output power of the new energy field is smaller than the minimum output power of the thermal power generating unit, the dynamic updating module searches for peak regulation resources of the nearby block area, arranges peak regulation of the thermal power generating unit according to the distance from the block area, namely, the thermal power generating unit with the maximum distance from the block area firstly reduces the load and continues to regulate the peak; and when the difference value between the electric load and the new energy field station output in the divided block areas is larger than or equal to the minimum output of the thermal power unit, peak regulation is continued, the electric load, the thermal power unit output and the new energy field station output are dynamically updated according to the predicted or actual operation condition, and the weighted output positions corresponding to power generation of the thermal power unit and the new energy field station and the weighted positions of the electric load are dynamically updated.
Compared with the prior art, the method has the advantages that when the peak regulation and the regulation are carried out in the whole block area, the renewable energy source power generation output change and the electricity load change in different partial block areas are considered, the peak regulation combination of the thermal power unit can be optimized, the economy of the whole electricity utilization is improved, and meanwhile, the safety and the stability of a power grid are guaranteed.
Drawings
FIG. 1 is a schematic flow chart of a thermal power unit peak regulation and optimization scheduling method based on comprehensive consideration of conditions such as thermal power unit output, load side application requirements, new energy station power generation conditions and the like;
FIG. 2 is a diagram of a division of a region into portions based on geographic locations within the region;
fig. 3 shows that the thermal power generating unit and the new energy station used for peak shaving are marked according to geographic coordinates and the generated energy, yellow indicates the thermal power generating unit used for peak shaving, green indicates the new energy station, and red indicates the load power demand;
fig. 4 is a working flow chart of a regulation and control system of a thermal power generating unit peak regulation and control method based on global energy consumption optimization.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The embodiments described herein are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by a person skilled in the art without making any inventive step on the basis of the spirit of the present invention are within the scope of protection of the present invention.
The invention aims to provide a thermal power unit peak regulation and control optimal scheduling method based on comprehensive consideration of conditions such as thermal power unit output, load side application demand, new energy station power generation conditions and the like.
Fig. 1 is a schematic flow chart of a thermal power unit peak regulation and control optimization scheduling method based on comprehensive consideration of conditions such as thermal power unit output, load side application requirements and new energy station power generation conditions.
The method comprises the following steps:
step 1: dividing a power grid needing peak regulation into different block areas; when the absolute value of the difference between the average power load in the set time period in the block region and the total generated output in the block region is less than or equal to the difference between the maximum load and the minimum load in the set time period, dividing the region into one block region, as shown in fig. 2; or divided into administrative blocks and regions, namely divided according to the city level;
step 2: marking thermal power generating units and new energy field stations used for peak shaving according to geographic coordinates and generated energy, and collecting geographic coordinates and output sizes of all thermal power generating units and new energy field stations in the divided block areas, and positions and sizes of power loads;
taking the block area C of fig. 2 as an example, the label is shown in fig. 3. Wherein yellow represents a thermal power unit used for peak regulation, green represents a new energy station, and red represents load power demand;
all thermal power generating units which are on line with the power generation participate in peak shaving, so that the power generation of the new energy station is completely consumed;
and step 3: calculating weighted output positions corresponding to power generation of the thermal power generating unit and the new energy station according to the geographical coordinates and the output sizes of the thermal power generating unit and the new energy station with the peak shaving obtained in the step 2, and calculating the weighted positions of the power loads by using the positions and the sizes of the power loads;
the historical operation data of the thermal power generating unit is obtained from the regulation and control platform and analyzed, the load of the thermal power generating unit which runs stably in the historical operation process is used as the minimum output, and the time of the thermal power generating unit which runs stably in the historical operation process is more than or equal to 2 hours.
The number of thermal power generating units in the block area is m, and the coordinates of the thermal power generating units are (x)1,y1)(x2,y2)… (xi,yi)…(xm,ym) The coordinates are calibrated according to longitude and latitude, and the output of each thermal power generating unit is H1……HmAnd the corresponding weighted output position (x) of the thermal power generating unitH,yH) The method comprises the following steps:
obtaining the minimum output which can be achieved by all thermal power generating units in the block area by using the historical operating data of the units
Wherein,
is the total output of the thermal power generating unit HminMinimum output, H, for all thermal power unitsi,minAnd the value of i is from 1 to m for the minimum output which can be achieved by the ith thermal power generating unit.
Weighted output position (x) corresponding to new energy stationF,yF) The method comprises the following steps:
wherein the total output of the new energy station is
The value of i of the ith new energy station is from 1 to n, n is the total number of the new energy stations, and the output position corresponding to the ith new energy station is (x'i,y′i) The output of each new energy station is F1……Fn。
The weighted positions of the electrical loads should be:
wherein, the position corresponding to the ith electric load is (x ″)i,y″i) The ith electrical load is QiI is 1 to q, q is the total number of the electric loads, and the total electric load in the block area is
And 4, step 4: comparing the total power load in the partitioned area divided in the step 1 with the output of the thermal power generating units and the new energy field station, marking the partitioned area with peak regulation resources when the total power load in the partitioned area is larger than or equal to the sum of the minimum output which can be achieved by all the thermal power generating units and the total output of the new energy field station, and marking the partitioned area needing peak regulation when the total power load in the partitioned area is smaller than the sum of the total output of the thermal power generating units and the total output of the new energy field station;
when in use
Then, the peak regulation is needed in the block area;
when in use
When the output of the thermal power generating unit in the block area is reduced to the minimum value, the peak regulation requirement cannot be met, and other block areas are required to provide peak regulation resources;
when in use
When the peak load is larger than the preset threshold, the set in the block area can meet the peak load demand and has the capacity of providing peak load resources for other block areas;
and 5: according to step 4, when peak shaving is required in the block area, the peak shaving principle is as follows: the thermal power generating units in the block area firstly participate in peak regulation, the sequence of the peak regulation is ordered according to the distance between the thermal power generating units and the load electricity utilization weighting position, namely, the thermal power generating unit with the largest distance between the thermal power generating units and the load weighting position firstly participates in the peak regulation and is reduced to the minimum output of the thermal power generating units, then other units are arranged to participate in the peak regulation according to the principle, when all the thermal power generating units in the block area participate in the peak regulation and can not meet the requirement, other block areas are searched for peak regulation resources, when other block area peak regulation resources are searched, the other block area peak regulation resources are selected according to the distance, and whether the peak regulation requirement is met is measured in real time; when a plurality of block areas need peak shaving, calculating the contents including coordinates of the block areas, and considering the contents as a whole;
the method comprises the following steps that power load, unit output and new energy field station output are subjected to real-time rolling updating, the rolling updating range comprises the whole regulation and control block area, and when the new energy field station output in the whole regulation and control block area can be completely consumed and the electric quantity is balanced, the peak regulation requirement is met;
step 6: comparing the difference value between the electric load and the station output of the new energy field in the partitioned areas divided in the step 1 with the minimum output of the thermal power generating unit in real time;
when the difference value between the electric load in the divided block area and the output force of the new energy field is smaller than the minimum output force of the thermal power generating unit, seeking peak regulation resources of the nearby block area, arranging peak regulation of the thermal power generating unit according to the distance between the thermal power generating unit and the block area, namely, firstly reducing the load of the thermal power generating unit with the largest distance between the thermal power generating unit and the block area, returning to the step 5, seeking a peak regulation space of the nearby area to continuously regulate the peak;
the number of thermal power generating units in the block area is m, and the coordinate is (x)1,y1)(x2,y2)…(xi,yi)… (xm,ym) At the moment t, the output of the thermal power generating unit is respectively H1(t)……Hm(t), the weighted output position (x) corresponding to the thermal power generating unit at the moment tH(t),yH(t)) should be:
obtaining the minimum output which can be achieved by all thermal power generating units in the block area at the time t by utilizing the historical operating data of the thermal power generating units
Wherein,
for total output of thermal power generating unit at time t, Hmin(t) is the minimum output that can be achieved by all thermal power generating units at time t, Hi,minAnd (t) is the minimum output which can be achieved by the ith thermal power generating unit at the moment t.
At the time t, the new energy station generates power corresponding to the weighted output position (x)F(t),yF(t)) should be:
wherein the total output of the new energy station at the moment t is
The value of i of the ith new energy station is from 1 to n, n is the total number of the new energy stations, and the output position corresponding to the ith new energy station is (x'i,y′i) And the generated output of each new energy station is F at the moment of t1(t)……Fn(t)。
At time t, the weighted position corresponding to the load should be:
wherein, the position corresponding to the ith electric load is (x ″)i,y″i) At time t, the ith electrical load is Qi(t), i takes the value of 1 to q, q is the total number of the electric loads, and the total electric load in the block area at the time t is
Pre-arranging peak regulation means of the thermoelectric generator set by utilizing the prediction, namely the prediction of the electric load and the station output of the new energy field, and combining a prediction function;
and 7: and when the difference value between the power load and the output of the new energy field in the divided block areas is larger than or equal to the minimum output of the thermal power unit, peak regulation is continued, the power load, the output of the thermal power unit and the output of the new energy field are dynamically updated according to the predicted or actual operation condition, and the weighted output positions corresponding to power generation of the thermal power unit and the new energy field and the weighted positions of the power load are dynamically updated.
And by utilizing the prediction, namely the prediction of the electric load and the new energy field station output, when the regulation and control platform has a prediction function with high prediction accuracy, the pre-arrangement of the peak regulation means of the thermal power generating unit is carried out by combining the prediction function.
The application also discloses a regulation and control system of the thermal power generating unit peak regulation and control method based on global energy consumption optimization, and the specific working flow is shown in fig. 4.
A thermal power unit peak regulation and control system based on global energy consumption optimization comprises a block region division module, a thermal power unit minimum output calculation module, a weighted output position and weighted position calculation module, a peak regulation resource block region marking module, a peak regulation module, a real-time comparison module and a dynamic update module, and is characterized in that:
the blocking area dividing module divides the power grid needing peak regulation into different blocking areas;
the thermal power generating unit minimum output calculation module is used for counting the electrical load, the new energy field station and the thermal power generating unit in the divided block area, marking the thermal power generating unit and the new energy field station which are used for peak regulation according to the geographic coordinates and the generated energy, and acquiring the geographic coordinates and the output sizes of all the thermal power generating units and the new energy field station in the divided block area as well as the position and the size of the electrical load;
the weighted output position and weighted position calculation module calculates the weighted output positions corresponding to power generation of the thermal power generating unit and the new energy field station according to the obtained geographical coordinates and output sizes of the thermal power generating unit and the new energy field station with peak shaving, and calculates the weighted positions of the power loads by using the positions and sizes of the power loads;
the peak regulation resource block area marking module compares the total power load in the divided block areas with the output of the thermal power generating units and the new energy field station, when the total power load in the divided block areas is more than or equal to the sum of the minimum output which can be achieved by all the thermal power generating units and the total output of the new energy field station, the block areas are marked as block areas with peak regulation resources, and when the total power load in the divided block areas is less than the sum of the total output of the thermal power generating units and the total output of the new energy field station, the block areas are marked as block areas needing peak regulation;
when the peak regulation module needs peak regulation in the block area, the peak regulation principle is as follows: the method comprises the steps that firstly, the thermal power units in a block area participate in peak regulation, the sequence of the peak regulation is arranged according to the distance between the thermal power units and a load electricity utilization weighting position, namely, the thermal power unit with the largest distance between the thermal power units and the load weighting position participates in the peak regulation firstly and reduces the power to the minimum output of the thermal power unit, then other units are arranged according to the principle to participate in the peak regulation, when all the thermal power units in the block area participate in the peak regulation and cannot meet the requirement, other block areas are searched for peak regulation resources, when other block area peak regulation resources are searched, the distance is selected according to the distance, and whether the peak regulation requirement is met is measured in real time;
the real-time comparison module compares the difference value between the electric load and the output of the new energy field in the divided block areas with the minimum output of the thermal power generating unit in real time;
when the difference value between the electric load in the divided block area and the output power of the new energy field is smaller than the minimum output power of thermal power, the dynamic updating module searches for peak regulation resources of the nearby block area, arranges peak regulation of the thermal power generating unit according to the distance from the block area, namely, firstly reduces the load of the thermal power generating unit with the maximum distance from the block area, and continues to regulate the peak;
and when the difference value between the power load and the new energy field station output in the divided block areas is larger than or equal to the minimum output of the thermal power unit, peak regulation is continued, the power load, the thermal power unit output and the new energy field station output are dynamically updated according to the predicted or actual operation condition, and the weighted output positions corresponding to power generation of the thermal power unit and the new energy field station and the weighted positions of the power load are dynamically updated.
Finally, it should be noted that: although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (15)
1. A thermal power generating unit peak regulation and control method based on global energy consumption optimization is characterized by comprising the following steps:
step 1: dividing a power grid needing peak regulation into different block areas;
step 2: marking thermal power generating units and new energy field stations used for peak shaving according to geographic coordinates and generated energy, and collecting geographic coordinates and output sizes of all thermal power generating units and new energy field stations in the divided block areas, and positions and sizes of power loads;
and 3, step 3: calculating weighted output positions corresponding to power generation of the thermal power generating unit and the new energy station according to the geographical coordinates and the output sizes of the thermal power generating unit and the new energy station with the peak shaving function obtained in the step 2, and calculating the weighted positions of the power loads by using the positions and the sizes of the power loads;
and 4, step 4: comparing the total power load in the partitioned areas divided in the step 1 with the output of the thermal power generating units and the new energy field station, marking the partitioned areas with peak shaving resources when the total power load in the partitioned areas is larger than or equal to the sum of the minimum output which can be achieved by all the thermal power generating units and the total output of the new energy field station, and marking the partitioned areas needing peak shaving when the total power load in the partitioned areas is smaller than the sum of the total output of the thermal power generating units and the total output of the new energy field station;
and 5: according to step 4, when peak shaving is required in the block area, the peak shaving principle is as follows: the thermal power generating units in the block area firstly participate in peak regulation, the sequence of the peak regulation is sorted according to the distance between the geographic coordinates of each thermal power generating unit in the block area and the load electricity utilization weighted position, namely, the thermal power generating unit with the largest distance from the load weighted position firstly participates in the peak regulation and is reduced to the minimum output of the thermal power generating unit, then other units are arranged to participate in the peak regulation according to the principle, when all the thermal power generating units in the block area participate in the peak regulation and cannot meet the demand, other block areas are searched for peak regulation resources, when other block area peak regulation resources are searched for, the distance between the weighted output positions of the thermal power generating units in other block areas and the electricity utilization load weighted position of the block area is selected according to the size of the distance between the weighted output positions of the thermal power generating units in other block areas, and whether the peak regulation demand is met is measured in real time; when a plurality of block areas need peak shaving, calculating the contents including coordinates of the block areas, and considering the contents as a whole;
and 6: comparing the difference value between the electric load and the station output of the new energy field in the partitioned areas divided in the step 1 with the minimum output of the thermal power generating unit in real time;
when the difference value between the electric load in the divided block area and the output of the new energy field is smaller than the minimum output of the thermal power generating unit, seeking peak regulation resources of the nearby block area, arranging peak regulation of the thermal power generating unit according to the distance between the thermal power generating unit and the block area, namely, firstly reducing the load of the thermal power generating unit with the largest distance between the thermal power generating unit and the block area, returning to the step 5, and seeking a peak regulation space of the nearby area to continuously regulate the peak;
and 7: and when the difference value between the power load and the output of the new energy field in the divided block areas is larger than or equal to the minimum output of the thermal power unit, peak regulation is continued, the power load, the output of the thermal power unit and the output of the new energy field are dynamically updated according to the predicted or actual operation condition, and the weighted output positions corresponding to power generation of the thermal power unit and the new energy field and the weighted positions of the power load are dynamically updated.
2. The thermal power generating unit peak regulation and control method based on global energy consumption optimization according to claim 1, characterized in that:
in the step 1, when the absolute value of the difference between the average power load in the set time period in the block area and the total generated output in the block area is less than or equal to the difference between the maximum load and the minimum load in the set time period, the block area is divided into one block area.
3. The thermal power generating unit peak regulation and control method based on global energy consumption optimization according to claim 1, characterized in that:
in step 1, the system is divided into administrative areas.
4. The thermal power generating unit peak regulation and control method based on global energy consumption optimization according to claim 1, characterized in that:
in the step 3, the number of thermal power generating units in the block area is m, and the coordinates of the thermal power generating units are (x)1,y1)(x2,y2)…(xi,yi)…(xm,ym) The coordinates are calibrated according to longitude and latitude, and the output of each thermal power generating unit is H1……HmAnd the corresponding weighted output position (x) of the thermal power generating unitH,yH) The method comprises the following steps:
obtaining the minimum output which can be achieved by all thermal power generating units in the block area by using the historical operating data of the units
Wherein,
total output of thermal power generating unit, HminMinimum output, H, for all thermal power units to be able toi,minAnd the value of i is from 1 to m for the minimum output which can be achieved by the ith thermal power generating unit.
5. The thermal power generating unit peak regulation and control method based on global energy consumption optimization according to claim 4, characterized in that:
and taking the minimum stable operation output of the thermal power generating unit in the historical operation process as the minimum output.
6. The thermal power generating unit peak regulation and control method based on global energy consumption optimization according to claim 5, characterized in that:
the time for stable operation of the thermal power generating unit in the historical operation process is more than or equal to 2 hours.
7. The thermal power generating unit peak regulation and control method based on global energy consumption optimization according to claim 1, characterized in that:
in the step 3, the weighted output position (x) corresponding to the new energy stationF,yF) The method comprises the following steps:
wherein the total output of the new energy station is
The value of i of the ith new energy station is from 1 to n, n is the total number of the new energy stations, and the corresponding force output position of the ith new energy station is (x)i′,yi') and the new energy station output of each new energy station is F1……Fn。
8. The thermal power generating unit peak regulation and control method based on global energy consumption optimization according to claim 1, characterized in that:
in step 3, the weighted positions of the electrical loads are:
wherein, the position corresponding to the ith electric load is (x ″)i,y″i) The ith electrical load is QiI is 1 to q, q is the total number of the electric loads, and the total electric load in the block area is
9. The thermal power generating unit peak regulation and control method based on global energy consumption optimization according to any one of claims 4, 7 or 8, characterized by comprising the following steps:
in the step 4, when
Then, the peak regulation is needed in the block area;
when in use
When the output of the thermal power generating unit in the block area is reduced to the minimum value, the peak regulation requirement cannot be met, and other block areas are required to provide peak regulation resources;
when in use
Then, the unit in the block area can meet the peak regulation requirement, and the peak regulation resource is provided for other block areasThe ability of the cell to perform.
10. The thermal power generating unit peak regulation and control method based on global energy consumption optimization according to claim 1, characterized in that:
in the step 5, the power load, the output of the thermal power generating unit and the output of the new energy field station are updated in real time, and when the output of the new energy in the whole regulation and control block area can be completely consumed and the electric quantity is balanced, the peak regulation requirement is met.
11. The thermal power generating unit peak regulation and control method based on global energy consumption optimization according to claim 1, characterized in that:
in the step 6, the number of thermal power generating units in the block area is m, and the coordinate is (x)1,y1)(x2,y2)…(xi,yi)…(xm,ym) At the moment t, the output of the thermal power generating unit is respectively H1(t)……Hm(t), the corresponding weighted output position (x) of the thermal power generating unit at the moment tH(t),yH(t)) should be:
obtaining the minimum output which can be achieved by all thermal power generating units in the block area at the time t by utilizing the historical operating data of the thermal power generating units
Wherein,
is at the same timetotal output of thermal power generating unit at time t, Hmin(t) is the minimum output that can be achieved by all thermal power generating units at time t, Hi,minAnd (t) is the minimum output which can be achieved by the ith thermal power generating unit at the moment t.
12. The thermal power generating unit peak regulation and control method based on global energy consumption optimization according to claim 1, characterized in that:
in the step 6, at the time t, the new energy station generates the corresponding weighted output position (x)F(t),yF(t)) should be:
wherein the total output of the new energy station at the moment t is
The value of i of the ith new energy station is from 1 to n, n is the total number of the new energy stations, and the corresponding force output position of the ith new energy station is (x)i′,yi') and the generated power output of each new energy station is F at the time of t1(t)……Fn(t)。
13. The thermal power generating unit peak regulation and control method based on global energy consumption optimization according to claim 1, characterized in that:
in step 6, at time t, the weighted position corresponding to the load should be:
wherein, the position corresponding to the ith electric load is (x ″)i,y″i) At time t, the ith electrical load is Qi(t), i is 1 to q, q is the total number of the electric loads, and the total electric load in the block area at the time t is
14. The thermal power generating unit peak regulation and control method based on global energy consumption optimization according to claim 1, characterized in that:
in the step 7, the thermal power generating unit peak regulation means is prearranged by utilizing the prediction of the electric load and the new energy field station output and combining the prediction function.
15. A regulating and controlling system using the thermal power generating unit peak regulation and controlling method based on global energy consumption optimization as claimed in any one of claims 1 to 14, the thermal power generating unit peak regulation and controlling system comprising a block region division module, a thermal power generating unit minimum output calculation module, a weighted output position and weighted position calculation module, a peak regulation resource block region marking module, a peak regulation module, a real-time comparison module and a dynamic update module, and is characterized in that:
the block area division module divides the power grid needing peak regulation into different block areas;
the thermal power generating unit minimum output calculating module is used for counting the electrical load, the new energy field station and the thermal power generating units in the divided block areas, marking the thermal power generating units and the new energy field station used for peak regulation according to the geographic coordinates and the generated energy, and acquiring the geographic coordinates and the output sizes of all the thermal power generating units and the new energy field station in the divided block areas as well as the positions and the sizes of the electrical load;
the weighted output position and weighted position calculating module calculates the weighted output positions corresponding to power generation of the thermal power generating unit and the new energy station according to the obtained geographical coordinates and output sizes of the thermal power generating unit and the new energy station with peak shaving, and calculates the weighted positions of the power loads by using the positions and sizes of the power loads;
the peak regulation resource block area marking module compares the total power load in the divided block areas with the output of the thermal power generating units and the new energy field station, when the total power load in the divided block areas is more than or equal to the sum of the minimum output which can be achieved by all the thermal power generating units and the total output of the new energy field station, the block areas are marked as block areas with peak regulation resources, and when the total power load in the divided block areas is less than the sum of the total output of the thermal power generating units and the total output of the new energy field station, the block areas are marked as block areas needing peak regulation;
when the peak regulation module needs peak regulation in the block area, the peak regulation principle is as follows: the thermal power generating units in the block area participate in peak regulation at first, the sequence of the peak regulation is ordered according to the distance between the thermal power generating units and the load electricity utilization weighting position, namely, the thermal power generating unit with the largest distance between the thermal power generating units and the load weighting position participates in the peak regulation at first and is reduced to the minimum output of the thermal power generating unit, then other units are arranged to participate in the peak regulation according to the principle, when all the thermal power generating units in the block area participate in the peak regulation and cannot meet the requirement, other block areas are searched for peak regulation resources, when the other block areas are searched for the peak regulation resources, the other block areas are selected according to the distance, and whether the peak regulation requirement is met is measured in real time;
the real-time comparison module compares the difference value between the electric load and the station output of the new energy field in the divided block areas with the minimum output of the thermal power generating unit in real time;
when the difference value between the electric load in the partitioned block area and the output power of the new energy field is smaller than the minimum output power of the thermal power generating unit, the dynamic updating module searches for peak regulation resources of the nearby block area, arranges peak regulation of the thermal power generating unit according to the distance from the block area, namely, firstly reduces the load of the thermal power generating unit with the maximum distance from the block area, and continues to regulate the peak; and when the difference value between the power load and the output of the new energy field in the divided block areas is larger than or equal to the minimum output of the thermal power unit, peak regulation is continued, the power load, the output of the thermal power unit and the output of the new energy field are dynamically updated according to the predicted or actual operation condition, and the weighted output positions corresponding to power generation of the thermal power unit and the new energy field and the weighted positions of the power load are dynamically updated.
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