CN115983555A - Power and electric quantity balance measuring and calculating system and method - Google Patents
Power and electric quantity balance measuring and calculating system and method Download PDFInfo
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Abstract
The invention relates to a system and a method for measuring and calculating the balance of electric power and electric quantity, wherein the system comprises: the power balance calculation module is used for calculating the load level of a planned target year in the predicted area, the power output load level under the voltage level, a power balance mathematical model and a network power supply load value; the electric quantity balance calculation module is used for calculating the total power utilization level of the predicted power system in a planning period, the generated energy required by the predicted system, the thermal power generated energy of the system, the average installed capacity of thermal power year and the utilization hours of the thermal power installed machine; and drawing a power and electricity balance meter module, wherein the module is used for supplying load to a conventional network, electric automobile load, 5G base station load and considering novel load network supply load.
Description
Technical Field
The invention belongs to the technical field of power and electric quantity measurement and calculation, and particularly relates to a power and electric quantity balance measurement and calculation system and method.
Background
With the rapid development of socioeconomic performance, the overall demand for electricity is gradually increasing. Coal resources have long been widely used in power generation operations in power systems. However, the total amount of coal is gradually decreasing as a non-renewable resource. In order to meet the actual power demand, new energy becomes one of important power generation energy.
At present, a new energy power system is continuously developed, during planning, in order to perform electric energy production and transmission under a more reasonable structure and mode and meet the continuously increasing power load demand, more attention should be paid to performing electric power and electric quantity balance measurement, and within a specified time and period range, cross-region and cross-season overall arrangement is implemented on the output and the generated energy of each power plant in the power system, so that the optimal utilization of power resources is realized, the power supply degree of each time period reaches a balanced state, and the function of decision-making basis is played on long-term power planning and scheduling work.
In view of the above, the present invention provides a system and a method for measuring and calculating power and power balance, which are necessary to solve the above technical problems in the prior art.
Disclosure of Invention
The present invention is directed to a system and a method for measuring and calculating power and power balance, which are designed to solve the above technical problems.
In order to realize the purpose, the invention provides the following technical scheme:
a power balance measurement system, comprising:
the power balance calculation module is used for calculating the load level of a planned target year in a predicted area, the load level supplied by power output (including distributed energy) under the voltage level, a power balance mathematical model and a network supply load value;
the electric quantity balance calculation module is used for calculating the total electric power consumption level of the predicted electric power system in a planning period, the generated energy required by the predicted system, the thermal power generated energy of the system, the average installed capacity of thermal power year and the utilization hours of the thermal power installed;
the module is used for drawing a power and electric quantity balance meter module, and the module is used for drawing a balance meter of a conventional network power supply load, an electric automobile load, a 5G base station load, a novel load network power supply load, a power supply installation of 35kV and below, power output of 35kV and below, a large user of 110kV and above, a 10kV load supplied outside a district, a 10kV load outside a supply district, an interruptible load, a 110kV network power supply load required, the total capacity of existing power transformation, newly-added power transformation capacity required, system required power generation capacity, hydropower power generation capacity, thermoelectricity required power generation capacity, actual thermoelectricity power generation capacity, electric quantity profit and loss and system fuel required quantity.
Preferably, the load level of the planned target year in the predicted area is calculated by the power balance calculation module in the following way:
by a load density index method, combining typical plot load curves obtained by clustering, and superposing from bottom to top to obtain grid conventional load curves;
the method comprises the steps that a typical plot and grid charging load curve is formed by distributing the planning scale of the electric vehicle from top to bottom and applying Monte Carlo charging simulation;
based on roof investigation and photovoltaic development intensity statistics, obtaining typical plot and grid photovoltaic output curves by using cluster analysis;
quantitatively measuring and calculating the responsive load quantity of each plot based on the depth and the enthusiasm level of the air conditioners of different types of users in the non-sensible participation demand side response;
and obtaining a network supply load prediction result considering the various influence factors by superposing various load curves from bottom to top.
Preferably, the calculating of the load level supplied by the power output (including distributed energy) at the voltage level in the power balance calculating module specifically includes:
and deducting the loads of the medium-low voltage distribution network or the large user directly supplied by the upper-level transformer substation and the lower-level transformer substation in the predicted load, the interruptible load supplied by the voltage level and the energy storage capacity of the power network side and the user side supplied by the voltage level.
Preferably, the power balance calculation module calculates the power balance mathematical model by:
increasing or decreasing the load outside the area responsible for power supply of the planning area or the load of the power supply of the area by the outer area; a power balance mathematical model for each voltage class is obtained as follows:
in the formula:
is the total capacity of the substation at a certain voltage class (e.g. 110 kV) required for the planned horizontal year;
Considering that under the influence of photovoltaic power generation, the photovoltaic power generation becomes the largest uncertain factor influencing the peak power supply capacity, and the power balance shortage presents the characteristic of shifting from the load peak time to the evening and the night. This patent adopts and carries out balance analysis to the peak load in summer of longevity light electric wire netting, reachs the electric power flow direction.
In the summer peak load mode, the principle of electric power balance is as follows:
(1) Conventional hydropower is regulated to participate in balance according to 50% of installed capacity.
(2) The coordinated natural gas participates in the balance according to 80% of the installed capacity.
(3) The coal-electricity, the pumping storage and the nuclear power are uniformly adjusted to participate in the balance according to the full capacity.
(4) According to a historical output curve, considering that the photovoltaic participates in balance according to 20% of installed capacity; wind power participates in balance according to 5% of installed capacity.
(5) The energy storage device participates in the balance according to 90% of the installed capacity.
(6) Biomass: biomass of 6MW and above participate in the balance at 50% capacity, and biomass of 6MW and below do not participate in the balance.
Preferably, the grid supply load value in the power balance calculation module is calculated by the following method:
the network supply load value of the novel load is not considered in the prediction, and the normal state supply and demand balance analysis result can be obtained by superposing the predicted load of the electric automobile, the predicted load of the 5G base station and the energy storage charging load;
and the elastic state supply and demand balance result can be obtained by subtracting new energy such as distributed photovoltaic and the like, interruptible load and stored energy discharge balance load from the grid supply load value of the novel load.
And (5) giving by combining specific situations to obtain the newly increased transformation capacity required by the area.
Preferably, the electric quantity balance calculation module performs calculation in the following manner:
predicting the total power utilization level of the power system in a planning period;
predicting the power generation amount required by the system;
calculating the annual energy production of the power plant, calculating the annual energy production of the power plant according to the dry year and the open year, balancing the electricity quantity of the open year in the electricity quantity balance, and checking the electricity quantity of the dry year;
and (4) calculating the thermal power generation amount of the system, wherein the thermal power generation amount of the system is equal to the power generation amount required by the system minus the power generation amount of the hydraulic power plant and the power generation amount of other power supplies.
Calculating the average installed capacity of the thermal power year, and calculating the average installed capacity of the thermal power year according to the installed capacity at the bottom of the thermal power year and the newly increased capacity of the current year;
and measuring and calculating the utilization hours of the thermal power installation machine, wherein the utilization hours of the thermal power installation machine are equal to the power generation amount of the thermal power year divided by the average installed capacity of the thermal power year.
And (5) setting a scene to obtain the power generation quantity required by the system.
The invention also provides a power and electric quantity balance measuring and calculating method, which comprises the following steps:
step S1: calculating the load level of a planned target year in the predicted area, the load level of power output (including distributed energy) under the voltage level, a power balance mathematical model and a grid power supply load value;
step S2: calculating the total power utilization level of the predicted power system in a planning period, the power generation amount required by the predicted system, the thermal power generation amount of the system, the average installed capacity of thermal power year and the utilization hours of the thermal power installed machine;
and step S3: and drawing a power and electric quantity balance meter, wherein the balance meter is drawn for a conventional network supply load, an electric automobile load, a 5G base station load, a novel load network supply load, a power supply installation of 35kV and below, power output of 35kV and below, 110kV and above large users, an extra-district 10kV load, an interruptible load, a 110kV network supply load, an existing power transformation total capacity, a newly-added power transformation capacity, a system required power generation capacity, a hydropower generation capacity, a thermoelectricity required power generation capacity, a thermoelectricity actual power generation capacity, a power profit and loss and a system fuel requirement.
Preferably, in step S1, the load level of the planned target year in the predicted area is calculated by:
by a load density index method, combining typical plot load curves obtained by clustering, and superposing from bottom to top to obtain grid conventional load curves;
the method comprises the steps that the planning scale of the electric vehicle is distributed from top to bottom, and a typical plot and grid charging load curve is formed by Monte Carlo charging simulation;
based on roof investigation and photovoltaic development intensity statistics, obtaining typical plot and grid photovoltaic output curves by using cluster analysis;
quantitatively measuring and calculating the responsive load quantity of each plot based on the depth and the enthusiasm level of the air conditioners of different types of users in the non-sensible participation demand side response;
and obtaining a network supply load prediction result considering the various influence factors by superposing various load curves from bottom to top.
Preferably, the calculating the load level supplied by the power output (including the distributed energy) at the voltage level in step S1 specifically includes:
and deducting the loads of the medium-low voltage distribution network or the large user directly supplied by the upper-level transformer substation and the lower-level transformer substation in the predicted load, the interruptible load supplied by the voltage level and the energy storage capacity of the power network side and the user side supplied by the voltage level.
Preferably, the power balance mathematical model in step S1 is calculated by:
increasing or decreasing the load outside the planned area responsible for power supply or the load supplied by the external area to the local area; a power balance mathematical model for each voltage class is obtained as follows:
in the formula:
is the total capacity of the substation at a certain voltage class (e.g. 110 kV) required for the planned horizontal year;
Considering that under the influence of photovoltaic power generation, the photovoltaic power generation becomes the largest uncertain factor influencing the peak power supply capacity, and the power balance shortage presents the characteristic of shifting from the load peak time to the evening and the night. This patent adopts and carries out balance analysis to the peak load in summer of longevity light electric wire netting, reachs the electric power flow direction.
In the summer peak load mode, the principle of electric power balance is as follows:
(1) Conventional hydropower is regulated to participate in balance according to 50% of installed capacity.
(2) The coordinated natural gas participates in the balance according to 80% of the installed capacity.
(3) The coal-electricity, the pumping storage and the nuclear power are uniformly adjusted to participate in the balance according to the full capacity.
(4) According to a historical output curve, considering that the photovoltaic power participates in balance according to 20% of installed capacity; wind power participates in balance according to 5% of installed capacity.
(5) The energy storage device participates in the balance according to 90% of the installed capacity.
(6) Biomass: biomass of 6MW and above participate in the balance at 50% capacity, and biomass of 6MW and below do not participate in the balance.
Preferably, the load value of the network supplied in step S1 is calculated by:
the network supply load value of the novel load is not considered in prediction, and the normal state supply and demand balance analysis result can be obtained by superposing the predicted load of the electric automobile, the predicted load of the 5G base station and the energy storage charging load;
and the elastic state supply and demand balance result can be obtained by subtracting new energy such as distributed photovoltaic and the like, interruptible load and stored energy discharge balance load from the grid supply load value of the novel load.
And (5) giving by combining specific situations to obtain the newly increased transformation capacity required by the area.
Preferably, the step S2 is calculated by:
predicting the total power utilization level of the power system in a planning period;
predicting the power generation amount required by the system;
calculating the annual energy production of the power plant, calculating the annual energy production of the power plant according to the dry year and the open year, balancing the electricity quantity of the open year in the electricity quantity balance, and checking the electricity quantity of the dry year;
and (4) calculating the thermal power generation amount of the system, wherein the thermal power generation amount of the system is equal to the power generation amount required by the system minus the power generation amount of the hydraulic power plant and the power generation amount of other power supplies.
Calculating the average installed capacity of the thermal power year, and calculating the average installed capacity of the thermal power year according to the installed capacity at the bottom of the thermal power year and the newly increased capacity of the current year;
and measuring and calculating the utilization hours of the thermal power installation machine, wherein the utilization hours of the thermal power installation machine are equal to the annual generated energy divided by the annual average installed capacity of the thermal power.
And (5) setting a scene to obtain the power generation quantity required by the system.
The total fuel cost of the system is minimized under the conditions of ensuring the system to fully supply power to users and safe and reliable operation. The general principle is:
(1) The generated energy of a hydraulic power plant is preferentially utilized;
(2) The generated energy of cogeneration of a thermal power plant is fully utilized;
(3) In the system planning design, according to the fuel cost of a condensing power plant (including the output of a condensing part of a heating power plant), considering the correction of the loss of a power grid, sequentially increasing the output in the sequence from a low-cost power plant to a high-cost power plant;
(4) When the system load is lower than the sum of the forced output of a hydraulic power plant, the forced output of cogeneration of a thermal power plant and the minimum technical output of a condensing unit, the minimum technical output of the condensing unit and the forced output of the hydraulic power plant required for meeting the downstream water consumption must be preferentially arranged to ensure the safe operation of the power system.
The invention has the advantages that the electric power system can produce and transmit electric energy in a more reasonable structure and mode during the planning period, and can meet the continuously increasing power load demand. Through effectively analyzing the electric power and electric quantity balance meter, the staff can effectively analyze the specific installation scale and installation speed of the new energy power system in the planning year. Meanwhile, whether the electric quantity of the new energy power system meets the actual requirement or not can be analyzed by combining the electric quantity balance meter, and the fuel requirement and the final supply condition of the power system can be analyzed.
In addition, the invention has reliable design principle, simple structure and very wide application prospect.
Therefore, compared with the prior art, the invention has prominent substantive features and remarkable progress, and the beneficial effects of the implementation are also obvious.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic block diagram of a power electricity balance measuring system provided by the present invention.
Fig. 2 is a flowchart of a power electricity balance measuring method provided by the present invention.
The system comprises a power balance calculation module, a power balance calculation module and a power and power balance table drawing module, wherein the power balance calculation module is 1, the power balance calculation module is 2, and the power and power balance table drawing module is 3.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings by way of specific examples, which are illustrative of the present invention and are not limited to the following embodiments.
Example 1:
as shown in fig. 1, the power-electricity-quantity balance measuring and calculating system provided in this embodiment includes:
the power balance calculation module 1 is used for calculating the load level of a planned target year in a predicted area, the load level supplied by power output (including distributed energy) under the voltage level, a power balance mathematical model and a network supply load value;
the electric quantity balance calculation module 2 is used for calculating the total power utilization level of the predicted power system in a planning period, the generated energy required by the predicted system, the thermal power generated energy of the system, the average installed capacity of the thermal power year and the utilization hours of the thermal power installed machine;
and drawing a power and electric quantity balance meter module 3, which is used for drawing a balance meter for the conventional network power supply load, the electric automobile load, the 5G base station load, the novel load network power supply load, the power installation of 35kV and below, the power output of 35kV and below, large users of 110kV and above, the 10kV load outside the district, the 10kV load outside the supply district, the interruptible load, the 110kV network power supply load, the total capacity of the existing power transformation, the newly-added power transformation capacity, the power generation amount required by the system, the power generation amount required by hydropower, the power generation amount required by the thermoelectricity, the actual power generation amount of the thermoelectricity, the profit and loss of the power and the fuel requirement of the system.
The power balance calculation module calculates the load level of a planned target year in the predicted area in the following mode:
by a load density index method, combining typical plot load curves obtained by clustering, and superposing from bottom to top to obtain grid conventional load curves;
the method comprises the steps that a typical plot and grid charging load curve is formed by distributing the planning scale of the electric vehicle from top to bottom and applying Monte Carlo charging simulation;
based on roof investigation and photovoltaic development intensity statistics, obtaining typical plot and grid photovoltaic output curves by using cluster analysis;
quantitatively measuring and calculating the responsive load quantity of each plot based on the depth and the enthusiasm level of the air conditioners of different types of users in the non-sensible participation demand side response;
and obtaining a network supply load prediction result considering the various influence factors by superposing various load curves from bottom to top.
The calculation of the load level supplied by the power output (including distributed energy) at the voltage level in the power balance calculation module specifically includes:
and deducting the loads of the medium-low voltage distribution network or the large user directly supplied by the upper-level transformer substation and the lower-level transformer substation in the predicted load, the interruptible load supplied by the voltage level and the energy storage capacity of the power network side and the user side supplied by the voltage level.
The power balance calculation module calculates a power balance mathematical model in the following way:
increasing or decreasing the load outside the planned area responsible for power supply or the load supplied by the external area to the local area; a power balance mathematical model for each voltage class is obtained as follows:
in the formula:
is the total capacity of the substation at a certain voltage class (e.g. 110 kV) required for the planned horizontal year;
Considering that under the influence of photovoltaic power generation, the photovoltaic power generation becomes the largest uncertain factor influencing the peak power supply capacity, and the power balance shortage presents the characteristic of shifting from the load peak time to the evening and the night. This patent adopts and carries out balance analysis to the peak load in summer of longevity light electric wire netting, reachs the electric power flow direction.
In the summer peak load mode, the principle of electric power balance is as follows:
(1) Conventional hydropower is regulated to participate in balance according to 50% of installed capacity.
(2) The integrated natural gas is balanced according to 80 percent of installed capacity.
(3) The coal-electricity, the pumping storage and the nuclear power are uniformly adjusted to participate in the balance according to the full capacity.
(4) According to a historical output curve, considering that the photovoltaic participates in balance according to 20% of installed capacity; wind power participates in balance according to 5% of installed capacity.
(5) The energy storage device participates in the balance according to 90% of the installed capacity.
(6) Biomass: biomass of 6MW and above participate in the balance at 50% capacity, and biomass of 6MW and below do not participate in the balance.
The power balance calculation module calculates the grid supply load value in the following way:
the network supply load value of the novel load is not considered in prediction, and the normal state supply and demand balance analysis result can be obtained by superposing the predicted load of the electric automobile, the predicted load of the 5G base station and the energy storage charging load;
and the elastic state supply and demand balance result can be obtained by subtracting new energy such as distributed photovoltaic and the like, interruptible load and stored energy discharge balance load from the grid supply load value of the novel load.
And giving by combining specific scenes to obtain the newly increased transformation capacity required by the area.
The electric quantity balance calculation module performs calculation in the following mode:
predicting the total power utilization level of the power system in a planning period;
predicting the power generation amount required by the system;
calculating the annual energy production of the power plant, calculating the annual energy production of the power plant according to the dry year and the open year, balancing the electricity quantity of the open year in the electricity quantity balance, and checking the electricity quantity of the dry year;
and (4) measuring and calculating the thermal power generation amount of the system, wherein the thermal power generation amount of the system is equal to the power generation amount required by the system minus the power generation amount of the hydraulic power plant and the power generation amount of other power supplies.
Calculating the average installed capacity of the thermal power year, and calculating the average installed capacity of the thermal power year according to the installed capacity at the bottom of the thermal power year and the newly increased capacity of the current year;
and measuring and calculating the utilization hours of the thermal power installation machine, wherein the utilization hours of the thermal power installation machine are equal to the power generation amount of the thermal power year divided by the average installed capacity of the thermal power year.
And (5) setting a scene to obtain the power generation quantity required by the system.
Example 2:
as shown in fig. 2, the method for measuring and calculating power electric quantity balance provided in this embodiment includes the following steps:
step S1: calculating the load level of a planned target year in the predicted area, the load level of power output (including distributed energy) under the voltage level, a power balance mathematical model and a grid power supply load value;
step S2: calculating the total power utilization level of the predicted power system in a planning period, the power generation amount required by the predicted system, the thermal power generation amount of the system, the average installed capacity of thermal power year and the utilization hours of the thermal power installed machine;
and step S3: and drawing a power and electric quantity balance meter, wherein the balance meter is drawn for a conventional network power supply load, an electric automobile load, a 5G base station load, a novel load network power supply load, a power installation of 35kV and below, power output of 35kV and below, 110kV and above large users, an extra-district 10kV load, an interruptible load, a 110kV network power supply load, an existing power transformation total capacity, an additionally-increased power transformation capacity, a system required power generation amount, a hydroelectric power generation amount, a thermal power required power generation amount, a thermal power actual power generation amount, electric quantity profit and loss and a system fuel required amount.
In the step S1, the load level of the planned target year in the predicted area is calculated in the following manner:
by a load density index method, combining typical plot load curves obtained by clustering, and superposing from bottom to top to obtain grid conventional load curves;
the method comprises the steps that the planning scale of the electric vehicle is distributed from top to bottom, and a typical plot and grid charging load curve is formed by Monte Carlo charging simulation;
based on roof investigation and photovoltaic development intensity statistics, obtaining typical plot and grid photovoltaic output curves by using cluster analysis;
quantitatively measuring and calculating the responsive load quantity of each plot based on the depth and the enthusiasm level of the air conditioners of different types of users in the non-sensible participation demand side response;
and obtaining a network supply load prediction result considering the various influence factors by superposing various load curves from bottom to top.
The step S1 of calculating the load level supplied by the power output (including distributed energy) at the present voltage level specifically includes:
and deducting the loads of the medium-low voltage distribution network or the large user directly supplied by the upper-level transformer substation and the lower-level transformer substation in the predicted load, the interruptible load supplied by the voltage level and the energy storage capacity of the power network side and the user side supplied by the voltage level.
In the step S1, the power balance mathematical model is calculated in the following manner:
increasing or decreasing the load outside the planned area responsible for power supply or the load supplied by the external area to the local area; the following mathematical models of power balance for each voltage class are obtained:
in the formula:
is the total capacity of the substation at a certain voltage class (e.g. 110 kV) required for the planned horizontal year;
Considering that under the influence of photovoltaic power generation, the photovoltaic power generation becomes the largest uncertain factor influencing the peak power supply capacity, and the power balance shortage presents the characteristic of shifting from the load peak time to the evening and the night. This patent adopts and carries out balance analysis to the peak load in summer of longevity light electric wire netting, reachs the electric power flow direction.
In the summer peak load mode, the principle of electric power balance is as follows:
(1) Conventional hydropower is regulated to participate in balance according to 50% of installed capacity.
(2) The coordinated natural gas participates in the balance according to 80% of the installed capacity.
(3) The coal power, the pumping storage and the nuclear power are uniformly adjusted and balanced according to the full capacity.
(4) According to a historical output curve, considering that the photovoltaic participates in balance according to 20% of installed capacity; wind power participates in balance according to 5% of installed capacity.
(5) The energy storage device participates in the balance according to 90% of the installed capacity.
(6) Biomass: biomass of 6MW and above participates in the balance at 50% of the capacity, and biomass of 6MW and below does not participate in the balance.
In the step S1, the network supply load value is calculated in the following manner:
the network supply load value of the novel load is not considered in prediction, and the normal state supply and demand balance analysis result can be obtained by superposing the predicted load of the electric automobile, the predicted load of the 5G base station and the energy storage charging load;
and the elastic state supply and demand balance result can be obtained by subtracting the distributed photovoltaic and other new energy, interruptible load and energy storage and discharge balance load from the grid supply load value of the novel load.
And (5) giving by combining specific situations to obtain the newly increased transformation capacity required by the area.
The step S2 is calculated in the following manner:
predicting the total power utilization level of the power system in a planning period;
predicting the power generation amount required by the system;
calculating the annual energy production of the power plant, calculating the annual energy production of the power plant according to the dry year and the open year, balancing the electricity quantity of the open year in the electricity quantity balance, and checking the electricity quantity of the dry year;
and (4) measuring and calculating the thermal power generation amount of the system, wherein the thermal power generation amount of the system is equal to the power generation amount required by the system minus the power generation amount of the hydraulic power plant and the power generation amount of other power supplies.
Calculating the average installed capacity of the thermal power year, and calculating the average installed capacity of the thermal power year according to the installed capacity at the bottom of the thermal power year and the newly increased capacity of the current year;
and measuring and calculating the utilization hours of the thermal power installation machine, wherein the utilization hours of the thermal power installation machine are equal to the annual generated energy divided by the annual average installed capacity of the thermal power.
And (5) setting a scene to obtain the power generation quantity required by the system.
The total fuel cost of the system is minimized under the conditions of ensuring the system to fully supply power to users and safe and reliable operation. The general principle is:
(1) The generated energy of a hydraulic power plant is preferentially utilized;
(2) The generated energy of cogeneration of a thermal power plant is fully utilized;
(3) In the system planning design, according to the fuel cost of a condensing power plant (including the output of a condensing part of a heating power plant), considering the correction of the loss of a power grid, sequentially increasing the output in the sequence from a low-cost power plant to a high-cost power plant;
(4) When the system load is lower than the sum of the forced output of a hydraulic power plant, the forced output of cogeneration of a thermal power plant and the minimum technical output of a condensing unit, the minimum technical output of the condensing unit and the forced output of the hydraulic power plant required for meeting the downstream water consumption must be preferentially arranged to ensure the safe operation of the power system.
The above disclosure is only for the preferred embodiments of the present invention, but the present invention is not limited thereto, and any non-inventive changes that can be made by those skilled in the art and several modifications and amendments made without departing from the principle of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. A power electricity balance measuring and calculating system is characterized by comprising:
the power balance calculation module is used for calculating the load level of a planned target year in the predicted area, the load level of power output under the voltage level, a power balance mathematical model and a network supply load value;
the electric quantity balance calculation module is used for calculating the total electric power consumption level of the predicted electric power system in a planning period, the generated energy required by the predicted system, the thermal power generated energy of the system, the average installed capacity of thermal power year and the utilization hours of the thermal power installed;
the module is used for drawing a power and electric quantity balance meter and drawing a balance meter for a conventional network power supply load, an electric automobile load, a 5G base station load, a novel load network power supply load, a power installation of 35kV and below, power output of 35kV and below, 110kV and above large users, a 10kV load supplied outside a district, a 10kV load supplied outside the district, an interruptible load, a 110kV network power supply load required, the total capacity of existing power transformation, newly-added power transformation capacity required, system required power generation amount, hydroelectric power generation amount, thermal power required power generation amount, actual thermal power generation amount, electric quantity profit and loss and system fuel required amount.
2. The system according to claim 1, wherein the power balance calculating module calculates the load level of the planned target year in the predicted area by:
by a load density index method, combining typical plot load curves obtained by clustering, and superposing from bottom to top to obtain grid conventional load curves;
the method comprises the steps that a typical plot and grid charging load curve is formed by distributing the planning scale of the electric vehicle from top to bottom and applying Monte Carlo charging simulation;
based on roof investigation and photovoltaic development intensity statistics, obtaining typical plot and grid photovoltaic output curves by using cluster analysis;
quantitatively measuring and calculating the responsive load quantity of each plot based on the depth and the enthusiasm level of the air conditioners of different types of users in the non-sensible participation demand side response;
and obtaining a network supply load prediction result considering the various influence factors by superposing various load curves from bottom to top.
3. The system for measuring and calculating power electricity balance of claim 2, wherein the calculating of the load level of the power output at the voltage level in the power balance calculating module specifically comprises:
and deducting the loads of the medium-low voltage distribution network or the large user directly supplied by the upper-level transformer substation and the lower-level transformer substation in the predicted load, the interruptible load supplied by the voltage level and the energy storage capacity of the power network side and the user side supplied by the voltage level.
4. The system according to claim 3, wherein the power balance calculation module calculates the power balance mathematical model by:
increasing or decreasing the load outside the area responsible for power supply of the planning area or the load of the power supply of the area by the outer area; a power balance mathematical model for each voltage class is obtained as follows:
in the formula:
the total capacity of the transformer substation under a certain voltage level required by the planning of the horizontal year;
5. The system according to claim 4, wherein the grid supply load value in the power balance calculation module is calculated by:
the network supply load value of the novel load is not considered in the prediction, and the normal state supply and demand balance analysis result can be obtained by superposing the predicted load of the electric automobile, the predicted load of the 5G base station and the energy storage charging load;
the elastic state supply and demand balance result can be obtained by subtracting new energy such as distributed photovoltaic and the like, interruptible load and stored energy discharge balance load from the grid supply load value of the novel load;
the electric quantity balance calculation module performs calculation in the following mode:
predicting the total power utilization level of the power system in a planning period;
predicting the power generation amount required by the system;
calculating the annual energy production of the power plant, calculating the annual energy production of the power plant according to the dry year and the open year, balancing the electricity quantity of the open year in the electricity quantity balance, and checking the electricity quantity of the dry year;
calculating the thermal power generation capacity of the system, wherein the thermal power generation capacity of the system is equal to the power generation capacity required by the system minus the power generation capacity of the hydraulic power plant and the power generation capacity of other power supplies;
calculating the average installed capacity of the thermal power year, and calculating the average installed capacity of the thermal power year according to the installed capacity at the bottom of the thermal power year and the newly increased capacity of the current year;
and measuring and calculating the utilization hours of the thermal power installation machine, wherein the utilization hours of the thermal power installation machine are equal to the power generation amount of the thermal power year divided by the average installed capacity of the thermal power year.
6. The method for measuring and calculating the balance of electric power and electric quantity is characterized by comprising the following steps of:
step S1: calculating the load level of a planned target year in the predicted area, the load level of power output under the voltage level, a power balance mathematical model and a grid supply load value;
step S2: calculating the total power utilization level of the predicted power system in a planning period, the power generation amount required by the predicted system, the thermal power generation amount of the system, the average installed capacity of thermal power year and the utilization hours of the thermal power installed machine;
and step S3: and drawing a power and electric quantity balance meter, wherein the balance meter is drawn for a conventional network supply load, an electric automobile load, a 5G base station load, a novel load network supply load, a power supply installation of 35kV and below, power output of 35kV and below, 110kV and above large users, an extra-district 10kV load, an interruptible load, a 110kV network supply load, an existing power transformation total capacity, a newly-added power transformation capacity, a system required power generation capacity, a hydropower generation capacity, a thermoelectricity required power generation capacity, a thermoelectricity actual power generation capacity, a power profit and loss and a system fuel requirement.
7. The method for calculating the balance of electric power and energy according to claim 6, wherein the load level of the planned target year in the predicted area in step S1 is calculated by:
by a load density index method, combining typical plot load curves obtained by clustering, and superposing from bottom to top to obtain grid conventional load curves;
the method comprises the steps that a typical plot and grid charging load curve is formed by distributing the planning scale of the electric vehicle from top to bottom and applying Monte Carlo charging simulation;
based on roof investigation and photovoltaic development intensity statistics, obtaining typical plot and grid photovoltaic output curves by using cluster analysis;
quantitatively measuring and calculating the responsive load quantity of each plot based on the depth and the enthusiasm level of the air conditioners of different types of users in the non-sensible participation demand side response;
and obtaining a network supply load prediction result considering the various influence factors by superposing various load curves from bottom to top.
8. The method for calculating electric power and electric quantity balance according to claim 7, wherein the step S1 of calculating the load level supplied by the power output at the voltage level specifically comprises:
and deducting the loads of the medium-low voltage distribution network or the large user directly supplied by the upper-level transformer substation and the lower-level transformer substation in the predicted load, the interruptible load supplied by the voltage level and the energy storage capacity of the power network side and the user side supplied by the voltage level.
9. The method for measuring and calculating power electricity balance as claimed in claim 8, wherein the mathematical model of power balance in step S1 is calculated by:
increasing or decreasing the load outside the area responsible for power supply of the planning area or the load of the power supply of the area by the outer area; the following mathematical models of power balance for each voltage class are obtained:
in the formula:
is the total capacity of the substation under a certain voltage level required by the planning horizontal year;
10. The method for measuring and calculating power electric quantity balance according to claim 9, wherein the grid supply load value in the step S1 is calculated by:
the network supply load value of the novel load is not considered in prediction, and the normal state supply and demand balance analysis result can be obtained by superposing the predicted load of the electric automobile, the predicted load of the 5G base station and the energy storage charging load;
the elastic state supply and demand balance result can be obtained by subtracting new energy such as distributed photovoltaic and the like, interruptible load and stored energy discharge balance load from the grid supply load value of the novel load;
the step S2 is calculated in the following manner:
predicting the total power utilization level of the power system in a planning period;
predicting the power generation amount required by the system;
calculating the annual energy production of the power plant, calculating the annual energy production of the power plant according to the dry year and the open year, balancing the electricity quantity of the open year in the electricity quantity balance, and checking the electricity quantity of the dry year;
measuring and calculating the thermal power generation amount of the system, wherein the thermal power generation amount of the system is equal to the power generation amount required by the system minus the power generation amount of a hydraulic power plant and the power generation amount of other power supplies;
calculating the average installed capacity of the thermal power year, and calculating the average installed capacity of the thermal power year according to the installed capacity at the bottom of the thermal power year and the newly increased capacity of the current year;
and measuring and calculating the utilization hours of the thermal power installation machine, wherein the utilization hours of the thermal power installation machine are equal to the power generation amount of the thermal power year divided by the average installed capacity of the thermal power year.
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