A power source coordinated development planning method and system considering overall economy of coal power

Abstract

A power source coordinated development planning method and system considering the overall economy of coal power, the power source coordinated development planning method comprising: obtaining the data of the installed capacity of various types of power sources in the region; performing power balance calculation on the typical heavy load mode in the planning year to obtain the demand for the newly installed capacity of coal power in the planning year; calculating the profit and loss balance point of the coal power unit with different installed capacity in the utilization hours that meet the benchmark yield, combining the total installed capacity of coal power in the region in the planning year, to measure the profit and loss balance point of the overall utilization hours of coal power in the region in the planning year; calculating the power generation of wind and light new energy in the region in the planning year, constructing the relationship formula that the newly installed capacity of wind power and the newly installed capacity of photovoltaic need to meet, and performing power source coordination planning according to the relationship formula to obtain the planning result. The present application plans the scale of new energy on the basis of meeting the overall income of coal power enterprises, avoids the survival space of coal power units being squeezed by large-scale development of new energy, and promotes the scientific and reasonable development of power source.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power system planning, in particular to a power source coordinated development planning method and system considering overall economy of coal power. BACKGROUND

[0002] With the proposal of new energy system, large-scale development of new energy, its power squeeze the space of coal power bottom power supply, for overall consideration of power source side coordinated development, need to further consider the influence of economy on generating units.

[0003] At present, the power source planning is mainly through the influence of power balance and non-water renewable consumption weight, and the economy of coal power is not considered overall from the economy of power enterprises, which leads to the continuous decline of the income of coal power enterprises under the pressure of new energy power, and affects the sustainable operation and investment return. At the same time, the existing planning party ignores the economic constraints of coal power as bottom power supply, and the utilization hours of coal power are lower than the break-even point, which will lead to the overall loss or shutdown of coal power units, and further threaten the safety of regional power supply. SUMMARY

[0004] The present application provides a power source coordinated development planning method and system considering overall economy of coal power to solve the technical problems mentioned in the background art.

[0005] To achieve the above purpose, the technical scheme of the present application is as follows:

[0006] The present application provides a power source coordinated development planning method considering overall economy of coal power, comprising the following steps:

[0007] S1, obtaining the installed capacity of various types of power sources in the region, the installed capacity of various types of power sources in the region, the maximum load prediction results of the region in the planning year, and the power prediction results of the region in the planning year;

[0008] S2, using the installed capacity of various types of power sources in the region, the maximum load prediction results of the region in the planning year, to calculate the power balance of the typical large load mode in the planning year, and obtain the demand of coal power new installed capacity in the planning year;

[0009] S3, calculating the utilization hours of coal power units of different installed capacity at the break-even point of meeting the benchmark yield, combining with the total installed capacity of coal power in the region in the planning year, to measure the overall utilization hours of coal power in the region in the planning year;

[0010] S4, calculate the wind and light new energy power generation in the planning year in the region according to the profit and loss balance point of the overall utilization hours of the coal power in the planning year in the region, the total installed capacity of the coal power in the planning year in the region, and the electric quantity prediction result in the planning year in the region, and then construct a relationship formula that the newly added wind power installed capacity and the photovoltaic installed capacity need to meet according to the wind and light new energy power generation in the planning year in the region;

[0011] S5, perform power coordination planning according to the relationship formula that the newly added wind power installed capacity and the photovoltaic installed capacity need to meet, and obtain a planning result.

[0012] Further, the S1 specifically includes the following steps:

[0013] S11, obtain the installed capacity of various types of power sources in the region and the already determined newly built capacity of various types of power sources in the region;

[0014] S12, sum the installed capacity of various types of power sources in the region and the already determined newly built capacity of various types of power sources in the region, and obtain the already determined installed capacity of various types of power sources in the planning year in the region, including the already determined installed capacity of hydropower in the region , the already determined installed capacity of coal power in the region , the already determined installed capacity of wind power in the region , the already determined installed capacity of photovoltaic power in the region , the already determined installed capacity of biomass power in the region , the already determined installed capacity of gas power in the region , the already determined installed capacity of energy storage in the region , and the already determined scale of electricity from outside the region ;

[0015] S13, obtain the maximum load prediction result in the planning year in the region and the electric quantity prediction result in the planning year in the region.

[0016] Further, the calculation formula of the newly added coal power installed capacity demand in the planning year in the S2 is as follows:

[0017] ;

[0018] Among them, represents the newly added coal power installed capacity demand in the planning year; is the maximum load prediction result in the planning year in the region;

[0019] is the hydropower output coefficient; is the wind power output coefficient; is the photovoltaic output coefficient; is the biomass output coefficient; is the energy storage output coefficient; is the outside electricity output coefficient; The typical large mode load coefficient is the largest mode of load; the coal power output coefficient is 1.

[0020] Further, the S3 specifically comprises the following steps:

[0021] S31, acquiring coal power unit data of different installed capacities;

[0022] S32, calculating the utilization hour break-even point of the coal power unit of different installed capacities under the condition of meeting the benchmark yield rate;

[0023] S33, repeating S32 for multiple times until the number of repetitions reaches the set k times, to obtain the utilization hour break-even point 、 ,... ;

[0024] S34, solving the total installed capacity of coal power in the planning year in the region according to the coal power new installed capacity demand and the coal power installed capacity in the region;

[0025] S35, solving the overall utilization hour break-even point of coal power in the planning year in the region according to the utilization hour break-even point 、 ,... and the total installed capacity of coal power in the planning year in the region.

[0026] Further, the calculation formula of the utilization hour break-even point in the S3 is as follows:

[0027] ;

[0028] wherein, represents the utilization hour break-even point of the coal power unit of the i-th installed capacity under the condition of meeting the benchmark yield rate of the coal power enterprise; is the benchmark yield rate of the coal power enterprise; is the annual value of the coal power fixed cost of the coal power unit of the i-th installed capacity; is the annual value of the coal power capacity price of the coal power unit of the i-th installed capacity; is the coal power price; is the operation and maintenance cost of the coal power unit of the i-th installed capacity; is the tax and surcharge of the coal power unit of the i-th installed capacity; is the carbon emission cost of the coal power unit of the i-th installed capacity;

[0029] The calculation formula of the total installed capacity of coal power in the planning year in the region in the S34 is as follows:

[0030] ;

[0031] wherein, represents the total installed capacity of coal power in the region within the planning year.

[0032] Further, the calculation formula of the break-even point of the total utilization hours of coal power in the region within the planning year in S3 is:

[0033] ;

[0034] wherein, represents the break-even point of the total utilization hours of coal power in the region within the planning year; , , respectively represent the total installed capacity of coal power units of the first, second, and k types.

[0035] Further, S4 specifically comprises the following steps:

[0036] S41, solving the total power of the coal power installed in the region within the planning year by the total installed capacity of coal power in the region within the planning year and the break-even point of the total utilization hours of coal power in the region within the planning year;

[0037] S42, calculating the wind and light new energy power generation in the region within the planning year according to the installed capacity of each type of power source in the region within the planning year, the total power of the coal power installed in the region within the planning year, and the power prediction result in the region within the planning year;

[0038] S43, constructing a relationship formula that the newly added wind power installed capacity and the newly added photovoltaic installed capacity need to meet according to the wind and light new energy power generation in the region within the planning year, the installed capacity of wind power in the region, and the installed capacity of photovoltaic in the region.

[0039] Further, the calculation formula of the total power of the coal power installed in the region within the planning year in S41 is:

[0040] ;

[0041] wherein, represents the total power of the coal power installed in the region within the planning year;

[0042] The calculation formula of the wind and light new energy power generation in the region within the planning year in S42 is as follows:

[0043] ;

[0044] wherein, is the wind and light new energy power generation in the region within the planning year; is the power prediction result in the region within the planning year; is the historical power generation utilization hours of hydropower installed capacity; is the historical power generation utilization hours of biomass installed capacity; is the historical utilization hours of energy storage; is the historical utilization hours of gas power installed capacity; is the historical utilization hours of out-of-area power generation.

[0045] Further, the relationship formula that the newly added wind power installed capacity and the newly added photovoltaic installed capacity need to meet in the S4 is specifically as follows:

[0046]

[0047] wherein, is the historical utilization hours of wind power installed capacity; is the historical utilization hours of photovoltaic installed capacity; is the planned annual newly added wind power installed capacity in the region; is the planned annual newly added photovoltaic installed capacity in the region.

[0048] The second aspect of the present application also provides a power coordinated development planning system configured or executed to consider the overall economy of coal power.

[0049] The present application has the following beneficial effects:

[0050] The present application discloses a power coordinated development planning method considering the overall economy of coal power, which calculates the demand of coal power newly added installed capacity in the planning year under the premise of ensuring the present status of various types of power installed capacity, considers the profit and loss balance point of the utilization hours of coal power units with different installed capacities in meeting the benchmark yield rate, and combines the total coal power installed capacity in the planning year in the region to measure and obtain the profit and loss balance point of the overall utilization hours of coal power in the planning year in the region, and finally constructs the relationship formula that the newly added wind power installed capacity and the newly added photovoltaic installed capacity need to meet according to the relationship formula, which can guide the planning of new energy installed capacity and has guiding significance for power planning, avoids the over-scale development of new energy, and has important significance for the power development planning of new power systems. BRIEF DESCRIPTION OF DRAWINGS

[0051] Figure 1 is the flowchart of the power coordinated development planning method in the present application. DETAILED DESCRIPTION

[0052] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the related drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be realized in many other different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0053] Reference Figure 1 ​The embodiment of the application provides a power source coordinated development planning method considering the overall economy of coal power, comprising the following steps:

[0054] S1, obtaining the installed capacity of various types of power sources in the region, the newly-built installed capacity of various types of power sources in the region, the maximum load prediction result in the planning year of the region and the power prediction result in the planning year of the region;

[0055] S2, performing typical large load mode power balance calculation on the planning year by using the installed capacity of various types of power sources in the region and the maximum load prediction result in the planning year of the region, to obtain the newly-built installed capacity demand of coal power in the planning year;

[0056] S3, calculating the profit and loss balance point of coal power units with different installed capacities in the utilization hours for meeting the benchmark yield, combining the total installed capacity of coal power in the planning year of the region, to measure the profit and loss balance point of the overall utilization hours of coal power in the planning year of the region;

[0057] S4, calculating the wind and light new energy power generation in the planning year of the region according to the profit and loss balance point of the overall utilization hours of coal power in the planning year of the region, the total installed capacity of coal power in the planning year of the region and the power prediction result in the planning year of the region, and then constructing a relationship formula to be met by the newly-built wind power installed capacity and the photovoltaic installed capacity according to the wind and light new energy power generation in the planning year of the region;

[0058] S5, performing power source coordinated planning according to the relationship formula to be met by the newly-built wind power installed capacity and the photovoltaic installed capacity, to obtain the planning result.

[0059] In some embodiments, S1 specifically comprises the following steps:

[0060] S11, obtaining the installed capacity of various types of power sources in the region and the newly-built installed capacity of various types of power sources in the region;

[0061] S12, summing up the installed capacity of various types of power sources in the region and the newly-built installed capacity of various types of power sources in the region, to obtain the installed capacity of various types of power sources in the planning year of the region, including the installed capacity of hydropower in the region , the installed capacity of coal power in the region , the installed capacity of wind power in the region , the installed capacity of photovoltaic power in the region , the installed capacity of biomass power in the region , the installed capacity of gas power in the region , the installed capacity of energy storage in the region , the scale of external power in the region ;

[0062] S13, obtaining the regional planning annual maximum load prediction result and the regional planning annual electricity prediction result.

[0063] In some embodiments, the calculation formula of the planning annual coal power additional installed capacity demand in S2 is as follows:

[0064] ;

[0065] wherein, represents the planning annual coal power additional installed capacity demand; is the regional planning annual maximum load prediction result;

[0066] is the hydropower output coefficient; is the wind power output coefficient; is the photovoltaic output coefficient; is the biomass output coefficient; is the energy storage output coefficient; is the external power output coefficient; is the typical mode load coefficient, the typical mode is the mode with the maximum load; the coal power output coefficient is 1.

[0067] In some embodiments, S3 specifically comprises the following steps:

[0068] S31, obtaining coal power unit data of different installed capacities;

[0069] S32, calculating the utilization hour break-even point of coal power units of different installed capacities under the condition of meeting the benchmark yield rate;

[0070] S33, repeating S32 for multiple times until the number of repetitions reaches a set k times, to obtain utilization hour break-even points 、 , …… ;

[0071] S34, solving the regional planning annual coal power total installed capacity according to the planning annual coal power additional installed capacity demand and the regional planning annual coal power installed capacity;

[0072] S35, solving the regional planning annual coal power overall utilization hour break-even point according to the utilization hour break-even points 、 , …… and the regional planning annual coal power total installed capacity.

[0073] In some embodiments, the calculation formula of the utilization hour break-even point in S3 is as follows:

[0074] ;

[0075] wherein, represents the utilization hours break-even point of the coal-fired power unit of the i-th type of installed capacity under the base rate of return of the coal-fired power enterprise; is the base rate of return of the coal-fired power enterprise; is the annualized value of the coal-fired power fixed cost of the coal-fired power unit of the i-th type of installed capacity; is the annualized value of the coal-fired power capacity price of the coal-fired power unit of the i-th type of installed capacity; is the coal-fired power price; is the operation and maintenance cost per unit of electricity of the coal-fired power unit of the i-th type of installed capacity; is the tax and surcharge per unit of electricity of the coal-fired power unit of the i-th type of installed capacity; is the carbon emission cost per unit of electricity of the coal-fired power unit of the i-th type of installed capacity;

[0076] The calculation formula of the total installed capacity of the planned annual coal-fired power in the region in S34 is:

[0077] ;

[0078] wherein, represents the total installed capacity of the planned annual coal-fired power in the region.

[0079] In some embodiments, the calculation formula of the overall utilization hours break-even point of the planned annual coal-fired power in the region in S3 is:

[0080] ;

[0081] wherein, represents the overall utilization hours break-even point of the planned annual coal-fired power in the region. , , respectively represent the total installed capacity of the coal-fired power unit of the first, second, and k-th type of installed capacity.

[0082] In some embodiments, S4 specifically comprises the following steps:

[0083] S41, calculating the overall electricity of the planned annual coal-fired power installed capacity in the region by the total installed capacity of the planned annual coal-fired power in the region and the overall utilization hours break-even point of the planned annual coal-fired power in the region;

[0084] S42, calculating the wind-solar-new energy power generation in the region according to the planned annual installed capacity of each type of power source in the region, the overall electricity of the planned annual coal-fired power installed capacity in the region, and the planned annual electricity in the region;

[0085] S43, according to the relationship between the planned annual wind and light new energy power generation in the region, the wind power installed capacity in the region, and the photovoltaic installed capacity in the region, the relationship between the newly added wind power installed capacity and the photovoltaic installed capacity to be met is constructed.

[0086] In some embodiments, the calculation formula of the overall power of the planned annual coal power installed capacity in the region in S41 is:

[0087] ;

[0088] Among them, represents the overall power of the planned annual coal power installed capacity in the region;

[0089] The calculation formula of the planned annual wind and light new energy power generation in the region in S42 is as follows:

[0090] ;

[0091] Among them, is the planned annual wind and light new energy power generation in the region; is the annual power prediction result in the region; is the historical power generation utilization hours of hydropower installed capacity; is the historical power generation utilization hours of biomass installed capacity; is the historical power generation utilization hours of energy storage; is the historical power generation utilization hours of gas power installed capacity; is the historical power generation utilization hours outside the region.

[0092] In some embodiments, the relationship between the newly added wind power installed capacity and the photovoltaic installed capacity to be met in S4 is as follows:

[0093] ;

[0094] Among them, is the historical power generation utilization hours of wind power installed capacity; is the historical power generation utilization hours of photovoltaic installed capacity; is the planned annual newly added wind power installed capacity in the region; is the planned annual newly added photovoltaic installed capacity in the region.

[0095] The application discloses a power source coordinated development planning method considering overall economy of coal power, under the premise of guaranteeing present various power source installed capacity, calculates and plans coal power newly installed capacity demand in the year, considers coal power unit of different installed capacity in the utilization hour profit and loss balance point of meeting the benchmark yield, and combines the total coal power installed capacity in the region in the planning year, measures and calculates to obtain the utilization hour profit and loss balance point of the coal power in the region in the planning year, and finally constructs the relationship formula that the newly installed wind power capacity and the photovoltaic installed capacity need to meet according to the utilization hour profit and loss balance point of the coal power in the region in the planning year, and the relationship formula that the newly installed wind power capacity and the photovoltaic installed capacity need to meet can guide the new energy installed capacity planning, has guiding significance for power source planning, avoids the over-scale development of new energy, and has important significance for power source development planning of new power system.

[0096] The application is described in detail through the following cases:

[0097] Taking the power source planning scale configuration of a province in central China in 2030 as an example, the present coal power installed capacity of the region is 2610 million kilowatts, and the newly built coal power installed capacity in the region is 1000 million kilowatts.

[0098] Considering the present various power source installed capacity in the region, the maximum load prediction result in 2030 is predicted to reach 7600 million kilowatts, and the power prediction is 3520 billion kilowatt-hours, and on the basis of considering the various power source installed capacity in the region in 2030, the coal power newly installed capacity demand in 2030 reaches 1000 million kilowatts.

[0099] The coal power installed capacity of the region is mainly three types of installed capacity of 30 million kilowatts, 60 million kilowatts and 100 million kilowatts, and the basic parameters of the coal power are shown in Table 1.

[0100] Table 1, basic parameters of three types of installed capacity coal power

[0101]

[0102] Considering that the coal power price is 0.43 yuan / kilowatt-hour, and the coal power capacity price annual value is 330 yuan / kilowatt-year, the utilization hour profit and loss balance points of the coal power units of three types of installed capacity of 100 million kilowatts, 60 million kilowatts and 30 million kilowatts under the condition of meeting the coal power enterprise benchmark yield are respectively 1800 hours, 3000 hours and 4750 hours. The total coal power installed capacity in the planning year is 4610 million kilowatts, the total scale of the coal power units of three types of installed capacity of 100 million kilowatts, 60 million kilowatts and 30 million kilowatts is respectively 2600 million kilowatts, 1440 million kilowatts and 570 million kilowatts, and the overall utilization hour profit and loss balance point of the coal power is calculated

[0103] ​​​For 2540 hours.

[0104] The overall electricity of coal power installed capacity in the region in 2030 For 117.1 billion kWh.

[0105] The scale of other specific power sources in 2030 and the utilization hours are shown in Table 2:

[0106] Table 2, the scale of other specific power sources in 2030 and the utilization hours;

[0107]

[0108] According to the scale of various power sources installed in the region in 2030, the wind and light new energy power generation in the region in 2030 is calculated 986 billion kWh. The scale of wind power installed in the region in 2030 in the region 1200 million kW, the scale of photovoltaic installed in the region in 2030 in the region On the basis of 1300 million kW, the power of new energy needs to be controlled within 67.8 billion kWh.

[0109] On this basis, if all the new wind power is considered, 39.89 million kW of wind power can be newly installed; if all the new photovoltaic is considered, 84.76 million kW of photovoltaic can be newly installed; if the wind power and photovoltaic are considered to develop coordinately, the total power needs to be controlled within 67.8 billion kWh.

[0110] The second aspect of the present application also provides a power coordinated development planning system configured or executed to consider the overall economy of coal power.

[0111] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Moreover, the technical solutions of each embodiment of the present application can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A power source synergy development planning method considering the overall economic efficiency of coal-fired power, characterized in that, Includes the following steps: S1. Obtain the current installed capacity of various power sources in the region, the clearly defined new installed capacity of various power sources in the region, the predicted maximum annual load in the region, and the predicted annual electricity consumption in the region. S2. Using the existing installed capacity of various power sources in the region and the forecast results of the maximum load in the region in the planning year, perform power balance calculations for typical high load modes in the planning year to obtain the demand for new coal-fired power installed capacity in the planning year. S3. Calculate the break-even point of coal-fired power units with different installed capacities in terms of the number of utilization hours required to meet the benchmark rate of return. Combined with the planned annual total installed capacity of coal-fired power in the region, calculate the overall break-even point of the planned annual utilization hours of coal-fired power in the region. S4. Based on the break-even point of the overall utilization hours of coal-fired power in the region, the total installed capacity of coal-fired power in the region, and the power generation forecast results in the region, calculate the wind and solar new energy power generation in the region in the region in the planned year. Then, based on the wind and solar new energy power generation in the region in the planned year, construct the relationship that the newly added wind power installed capacity and photovoltaic installed capacity must satisfy. S5. Based on the relationship between the newly added wind power installed capacity and the photovoltaic installed capacity, power supply coordination planning is carried out to obtain the planning results; The formula for calculating the planned annual wind and solar renewable energy power generation in the region is as follows: ； in, The annual wind and solar renewable energy power generation is planned for the region; The projected annual electricity generation for the region; Historical power generation utilization hours of hydropower installed capacity; Historical power generation utilization hours of biomass installed capacity; This refers to the historical power generation utilization hours of the energy storage system. Historical power generation utilization hours of gas-fired power generation capacity; Historical power generation utilization hours outside the district; This indicates the total annual installed capacity of coal-fired power plants within the region; This indicates that the installed capacity of hydropower in the region has been determined; This indicates that the installed capacity of biomass equipment in the region has been clearly defined; This indicates that the installed capacity of gas-fired power generation in the region has been clearly defined; This indicates that the scale of electricity incoming from outside the region has been clearly defined within the area; This indicates that the installed capacity of energy storage in the region has been clearly defined; The specific relationship that the newly added wind power installed capacity and photovoltaic installed capacity in S4 must satisfy is as follows: ； in, Historical power generation utilization hours of wind power installed capacity; Historical power generation utilization hours of photovoltaic installed capacity; The annual increase in wind power installed capacity is planned for the region; The annual planned increase in photovoltaic installation capacity within the region; The installed capacity of wind power in the region has been clearly defined.

2. The power source synergy development planning method considering the overall economic efficiency of coal-fired power plants according to claim 1, characterized in that, S1 specifically includes the following steps: S11. Obtain the current installed capacity of various power sources in the region and the clearly defined new installed capacity of various power sources in the region; S12. Sum the current installed capacity of various power sources in the region with the clearly defined new installed capacity of various power sources in the region to obtain the clearly defined installed capacity of various power sources in the region for the planning year, including the clearly defined hydropower installed capacity in the region. The installed capacity of coal-fired power plants in the region has been clearly defined. The installed capacity of wind power in the region has been determined. The photovoltaic installation scale has been clearly defined in the region. The scale of biomass installed capacity in the region has been clearly defined. The installed capacity of gas-fired power plants in the region has been clearly defined. The installed capacity of energy storage in the region has been clearly defined. The scale of electricity imported from outside the region has been clearly defined within the area. ; S13. Obtain the predicted results of the maximum load in the planned year and the predicted results of the electricity consumption in the planned year within the region.

3. The power source synergy development planning method considering the overall economic efficiency of coal-fired power plants according to claim 2, characterized in that, The formula for calculating the planned annual new coal-fired power capacity demand in S2 is as follows: ； in, This indicates the planned annual demand for new coal-fired power capacity. This refers to the predicted maximum load for the planned year within the region. This is the hydropower output coefficient; This refers to the wind power output coefficient. Photovoltaic power output coefficient; This is the biomass output coefficient; This refers to the energy storage output coefficient; The power output coefficient for electricity supplied from outside the district; The typical large-scale load factor is the load factor for the mode with the largest load; the coal-fired power output factor is 1.

4. The power source synergy development planning method considering the overall economic efficiency of coal-fired power plants according to claim 3, characterized in that, S3 specifically includes the following steps: S31. Obtain data on coal-fired power units with different installed capacities; S32. Calculate the break-even point for coal-fired power units with different installed capacities based on the number of utilization hours required to meet the benchmark rate of return. S33. Repeat S32 multiple times until the set number of repetitions is reached (k times), to obtain the break-even point based on the number of utilization hours. , ... ; S34. Based on the planned annual new installed capacity demand for coal-fired power and the already defined installed capacity of coal-fired power in the region, calculate the planned annual total installed capacity of coal-fired power in the region. S35. Break-even point based on utilization hours , ... And to calculate the break-even point of the overall utilization hours of coal-fired power in the region in the planned annual total installed capacity of coal-fired power in the region.

5. The power source synergy development planning method considering the overall economic efficiency of coal-fired power plants according to claim 4, characterized in that, The formula for calculating the break-even point using hours in S3 is as follows: ； in, This represents the break-even point of the utilization hours for coal-fired power units of the i-th type of installed capacity, provided that the benchmark rate of return for coal-fired power enterprises is met. This serves as the benchmark rate of return for coal-fired power plants. For coal-fired power units of the i-th type of installed capacity, the annualized value of the coal-fired power fixed cost is used. For the annual value of the coal-fired power capacity electricity price of the i-th type of installed capacity coal-fired power units; For coal-fired power generation prices; The operation and maintenance cost per unit of electricity generated by coal-fired power units of the i-th type of installed capacity. Taxes and surcharges on the unit electricity volume of coal-fired power units of the i-th type of installed capacity; The carbon emission cost per unit of electricity generated by coal-fired power units of the i-th type of installed capacity. The formula for calculating the planned annual total installed capacity of coal-fired power plants in region S34 is as follows: Z= + ； Where Z represents the planned annual total installed capacity of coal-fired power in the region.

6. The power source synergy development planning method considering the overall economic efficiency of coal-fired power plants according to claim 5, characterized in that, The formula for calculating the break-even point of the planned annual overall utilization hours of coal-fired power plants in the S3 region is as follows: ； in, This indicates the break-even point for the overall annual utilization hours of coal-fired power plants within the region. , , These represent the total installed capacity of coal-fired power units in categories one, two, and k, respectively.

7. The power source synergy development planning method considering the overall economic efficiency of coal-fired power plants according to claim 6, characterized in that, S4 specifically includes the following steps: S41. Solve for the overall electricity volume of the planned annual coal-fired power generation in the region by using the planned annual total installed capacity of coal-fired power in the region and the break-even point of the overall annual utilization hours of coal-fired power in the region. S42. Calculate the planned annual wind and solar power generation in the region based on the planned annual installed capacity of various power sources in the region, the total installed power of coal-fired power in the region in the planned annual, and the power generation forecast results in the region in the planned annual. S43. Based on the planned annual wind and solar new energy power generation in the region, the clearly defined wind power installed capacity in the region, and the clearly defined photovoltaic installed capacity in the region, construct the relationship that the newly added wind power installed capacity and photovoltaic installed capacity must satisfy.

8. The power source synergy development planning method considering the overall economic efficiency of coal-fired power plants according to claim 7, characterized in that, The formula for calculating the total annual installed capacity of coal-fired power plants in the area described in S41 is as follows: ； in, This indicates the total annual installed capacity of coal-fired power plants within the region.

9. A power supply collaborative development planning system, characterized in that, The power supply synergy development planning method that takes into account the overall economics of coal-fired power as described in any one of claims 1 to 8 is configured or implemented.

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