Scheduling method and device of wind-solar-fire integrated industrial park power station

Abstract

The invention provides a dispatching method and device for a power supply station in a wind-solar-fire integrated industrial park, and relates to the technical field of power systems. The scheduling method of the wind-solar-fire integrated industrial park power supply station comprises the following steps: according to an active feasible region and a reactive feasible region of a thermal power generating unit at the next scheduling moment, an active feasible region and a reactive feasible region of a fan unit at the next scheduling moment, and an active feasible region and a reactive feasible region of a photovoltaic unit at the next scheduling moment, scheduling a power supply station according to the active feasible region and the reactive feasible region of the thermal power generating unit at the next scheduling moment; determining a power feasible region of the target power station at the next scheduling moment; and reporting the power feasible region of the target power station at the next scheduling moment to a scheduling system of the target power station. According to the method, the power feasible region of the power station of the wind-light-fire integrated industrial park under the given scheduling time scale can be efficiently and accurately estimated, and then the power station of the wind-light-fire integrated industrial park is scheduled based on the power feasible region of the power station of the wind-light-fire integrated industrial park.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power systems, and in particular to a dispatching method and device for a power supply station in an industrial park integrating wind, solar and thermal power. Background Art

[0002] In modern power systems, industrial parks are important energy consumption and distributed energy integration units. Their energy management and dispatch optimization are crucial to achieving the balance of supply and demand in the entire power system. The power supply stations of wind, solar and thermal integrated industrial parks usually contain multiple types of power sources, such as new energy power generation (wind, light, etc.), thermal power units, etc. These power sources vary in output characteristics, regulation capabilities and operating constraints. In order to respond to the overall dispatching needs of the external large power grid dispatching department, the industrial park needs to economically coordinate the output of each internal power source and transmit active and reactive power to the power grid through the coupling point. In this process, accurately describing the feasible domain of the overall sequential power of the industrial park has become the key to meeting the balance of supply and demand, optimizing energy configuration and improving system operation efficiency.

[0003] However, the diversity of power types within the power supply station of the wind, solar and thermal integrated industrial park and the uncertainty of new energy power generation have brought challenges to the characterization of the overall feasible domain. In particular, the access of a high proportion of new energy has large volatility, which requires thermal power units to smooth fluctuations through rapid load regulation and reduce energy abandonment when the output of new energy is high through deep peak regulation. After the technical transformation of the thermal power unit, although the regulation ability has been enhanced, its rapid load change characteristics have also led to changes in the feasible domain and coal consumption characteristics. In addition, in different time intervals, due to the influence of the unit's own performance, the climbing ability and operating feasible domain of the thermal power unit will also show different characteristics.

[0004] Therefore, how to efficiently and accurately estimate the power feasible domain of the power supply station in the wind, solar and thermal integrated industrial park under a given scheduling time scale, and to schedule the power supply station in the wind, solar and thermal integrated industrial park based on the power feasible domain of the power supply station in the wind, solar and thermal integrated industrial park, is a technical problem that needs to be solved urgently. Summary of the invention

[0005] In response to the above-mentioned problems existing in the prior art, the present invention provides a scheduling method and device for power supply stations in an integrated wind, solar and thermal industrial park, so as to efficiently and accurately estimate the power feasible domain of the power supply stations in the integrated wind, solar and thermal industrial park under a given scheduling time scale, and then schedule the power supply stations in the integrated wind, solar and thermal industrial park based on the power feasible domain of the power supply stations in the integrated wind, solar and thermal industrial park.

[0006] The present invention provides a dispatching method for a wind, solar and thermal integrated industrial park power supply station, comprising the following steps.

[0007] With respect to the dispatching duration, the active feasible domain of the thermal power unit at the next dispatching moment is determined according to the output range and climbing capacity of the thermal power unit of the target power station at the current moment, and the reactive feasible domain of the thermal power unit at the next dispatching moment is determined according to the electrical operation characteristic parameters of the thermal power unit; wherein the dispatching duration is the time difference between the next dispatching moment and the current moment, and the target power station is the power station of the wind, solar and thermal integrated industrial park; according to the maximum available wind power output and minimum utilization rate of the wind turbine unit of the target power station at the next dispatching moment, the active feasible domain of the wind turbine unit at the next dispatching moment is determined, and according to the active feasible domain of the wind turbine unit at the next dispatching moment, the electrical operation characteristic parameters of the wind turbine body and the capacity of the grid-side converter, the reactive feasible domain of the wind turbine at the next dispatching moment is determined; according to the maximum available output and minimum photovoltaic utilization rate of the photovoltaic unit of the target power station at the next dispatching moment, the active feasible domain of the photovoltaic unit is determined A feasible domain, determining the reactive feasible domain of the photovoltaic group at the next scheduling moment according to the active feasible domain of the photovoltaic group at the next scheduling moment and the capacity of the photovoltaic inverter in the photovoltaic group; determining the power feasible domain of the target power station at the next scheduling moment according to the active feasible domain and reactive feasible domain of the thermal power group at the next scheduling moment, the active feasible domain and reactive feasible domain of the wind turbine group at the next scheduling moment, and the active feasible domain and reactive feasible domain of the photovoltaic group at the next scheduling moment; reporting the power feasible domain of the target power station at the next scheduling moment to the scheduling system of the target power station; receiving the scheduling power of the target power station from the scheduling system, so that the target power station dispatches the thermal power group, the wind turbine group and the photovoltaic group to jointly output according to the scheduling power; wherein the scheduling power is obtained by the scheduling system performing power flow calculation based on the power feasible domains of multiple power stations including the target power station at the next scheduling moment.

[0008] According to a scheduling method for a power supply station in an integrated wind, solar and thermal industrial park provided by the present invention, the scheduling duration is less than a first duration threshold; wherein the first duration threshold is the ratio of the difference between the minimum output of the thermal power unit in a conventional peak-shaving state and the minimum output in a deep peak-shaving state, and a second maximum climbing rate, the second maximum climbing rate being the maximum climbing rate of the thermal power unit in a deep peak-shaving state; the scheduling duration is determined according to the output range and climbing capacity of the thermal power unit of the target power station at the current moment, and the active feasible domain of the thermal power unit at the next scheduling moment is determined, including: when the output range of the thermal power unit at the current moment is within the first output range, determining the active feasible domain of the thermal power unit at the next scheduling moment. The active feasible domain at the scheduling moment is the first active feasible domain; wherein, the first output range takes the maximum output of the thermal power unit as the upper boundary, and takes the maximum output of the thermal power unit minus the product of the first maximum climbing rate and the scheduling time as the lower boundary, and the first maximum climbing rate is the maximum climbing rate of the thermal power unit under the conventional peak-shaving state; the first active feasible domain takes the output of the thermal power unit at the current moment minus the product of the first maximum climbing rate and the scheduling time as the lower boundary, and takes the output of the thermal power unit at the current moment plus the product of the first maximum climbing rate and the scheduling time as the upper boundary; when the output range of the thermal power unit at the current moment is within the second output range, it is determined that the thermal power unit will be within the next output range. The active power feasible domain at the scheduling moment is the second active power feasible domain; wherein, the second output range takes the maximum output of the thermal power unit minus the product of the first maximum climbing rate and the scheduling time as the upper boundary, and takes the minimum output of the thermal power unit under the conventional peak-shaving state minus the product of the second maximum climbing rate and the scheduling time as the lower boundary, and the second maximum climbing rate is the maximum climbing rate of the thermal power unit under the deep peak-shaving state; the second active power feasible domain is, when the thermal power unit is in the second output range and is constrained by the first maximum climbing rate and the second maximum climbing rate, the range formed by the output upper limit value and the output lower limit value that can be achieved after the scheduling time; when the output of the thermal power unit at the current moment is When the range is within the third output range, the active feasible domain of the thermal power unit at the next scheduling moment is determined to be the third active feasible domain; wherein, the third output range takes the minimum output of the thermal power unit under the conventional peak-shaving state as the upper boundary, and takes the minimum output of the thermal power unit under the conventional peak-shaving state minus the product of the second maximum climbing rate and the scheduling duration as the lower boundary; the third active feasible domain takes the output of the thermal power unit at the current moment minus the product of the second maximum climbing rate and the scheduling duration as the lower boundary, and takes the output of the thermal power unit at the current moment plus the product of the second maximum climbing rate and the scheduling duration as the upper boundary; wherein, the output of the thermal power unit at the current moment satisfies the output constraint range;The output constraint range is defined as the maximum output of the thermal power unit as the upper boundary and the minimum output of the thermal power unit in the deep peak load regulation state as the lower boundary.

[0009] According to a scheduling method for a power supply station in an integrated wind, solar and thermal industrial park provided by the present invention, the scheduling duration is greater than the first duration threshold and less than the second duration threshold; wherein the second duration threshold is the difference between the maximum output of the thermal power unit and the minimum output under the conventional peak-shaving state divided by the first maximum climbing rate; the scheduling duration is based on the output range and climbing ability of the thermal power unit of the target power supply station at the current moment, and the active feasible domain of the thermal power unit at the next scheduling moment is determined, including: when the output range of the thermal power unit at the current moment is within the first output range, determining that the active feasible domain of the thermal power unit at the next scheduling moment is the first active feasible domain; when the output range of the thermal power unit at the current moment is within the second output range, determining that the active feasible domain of the thermal power unit at the next scheduling moment is the second active feasible domain.

[0010] According to a scheduling method for a wind-solar-fire integrated industrial park power supply station provided by the present invention, the scheduling duration is greater than a second duration threshold and less than a third duration threshold, and the third duration threshold is expressed using the following formula: ;in, is the scheduling duration; is the maximum output of the thermal power unit; is the first maximum climbing rate; is the second maximum climbing rate; is the minimum output of the thermal power unit under deep peak load regulation; is the minimum output of the thermal power group under the conventional peak-shaving state; according to the output range and climbing ability of the thermal power group of the target power source station at the current moment, the active feasible domain of the thermal power group at the next scheduling moment is determined for the scheduling duration, including: when the output range of the thermal power group at the current moment is within the second output range, determining the active feasible domain of the thermal power group at the next scheduling moment as the second active feasible domain.

[0011] According to a dispatching method for a power supply station in an integrated wind, solar and thermal industrial park provided by the present invention, the dispatching duration is greater than the third duration threshold; the dispatching duration is based on the output range and climbing ability of the thermal power unit of the target power supply station at the current moment, and the active feasible domain of the thermal power unit at the next dispatching moment is determined, including: the active feasible domain of the thermal power unit at the next dispatching moment has the maximum output of the thermal power unit as the upper boundary, and the minimum value of the thermal power unit in the deep peak regulation state as the lower boundary.

[0012] According to a dispatching method for a wind-solar-thermal integrated industrial park power supply station provided by the present invention, the reactive power feasible domain of the thermal power group at the next dispatching moment is determined according to the electrical operation characteristic parameters of the thermal power group, including: establishing the stator heating operation limit constraint of the thermal power group according to the maximum value of the stator current and the terminal voltage of the thermal power group, and obtaining the first reactive capacity boundary of the thermal power group when operating in a delayed phase; obtaining the second reactive capacity boundary of the thermal power group when operating in a leading phase according to the terminal voltage, the synchronous reactance of the generator and the external equivalent reactance of the thermal power group; and determining the reactive power feasible domain of the thermal power group at the next dispatching moment according to the first reactive capacity boundary and the second reactive capacity boundary.

[0013] According to a dispatching method for a wind-solar-thermal integrated industrial park power supply station provided by the present invention, the reactive feasible domain of the wind turbine at the next dispatching moment is determined according to the active feasible domain of the wind turbine unit at the next dispatching moment, the electrical operating characteristic parameters of the wind turbine body and the capacity of the grid-side converter, including: determining the reactive feasible domain of the wind turbine body according to the characteristic parameters of the stator of the wind turbine unit and the rotor current constraint; determining the reactive support provided by the wind turbine grid-side converter according to the capacity of the grid-side converter, the wind power slip rate and the predicted wind power output of the wind turbine unit at the next dispatching moment; determining the reactive feasible domain of the wind turbine at the next dispatching moment based on the reactive feasible domain of the wind turbine body and the reactive support provided by the wind turbine grid-side converter.

[0014] The present invention also provides a dispatching device for a wind, solar and thermal integrated industrial park power supply station, comprising the following modules: The first determination module is used to determine the active feasible domain of the thermal power unit at the next scheduling moment according to the output range and climbing ability of the thermal power unit of the target power station at the current moment, and to determine the reactive feasible domain of the thermal power unit at the next scheduling moment according to the electrical operation characteristic parameters of the thermal power unit; wherein the scheduling duration is the time difference between the next scheduling moment and the current moment, and the target power station is the power station of the wind, solar and thermal integrated industrial park; the second determination module is used to determine the reactive feasible domain of the thermal power unit at the next scheduling moment according to the electrical operation characteristic parameters of the thermal power unit. The maximum available wind power output and minimum utilization rate of the wind turbine unit at the next scheduling moment are used to determine the active feasible domain of the wind turbine unit at the next scheduling moment, and the reactive feasible domain of the wind turbine unit at the next scheduling moment is determined according to the active feasible domain of the wind turbine unit at the next scheduling moment, the electrical operation characteristic parameters of the wind turbine body and the capacity of the grid-side converter; the third determination module is used to determine the reactive feasible domain of the photovoltaic unit at the next scheduling moment according to the maximum available wind power output and the minimum utilization rate of the photovoltaic unit of the target power source station at the next scheduling moment. Active feasible domain, according to the active feasible domain of the photovoltaic unit at the next scheduling moment and the capacity of the photovoltaic inverter in the photovoltaic unit, determine the reactive feasible domain of the photovoltaic unit at the next scheduling moment; the fourth determination module is used to determine the power feasible domain of the target power station at the next scheduling moment according to the active feasible domain and reactive feasible domain of the thermal power unit at the next scheduling moment, the active feasible domain and reactive feasible domain of the wind turbine unit at the next scheduling moment, and the active feasible domain and reactive feasible domain of the photovoltaic unit at the next scheduling moment; A reporting module is used to report the power feasible domain of the target power station at the next scheduling moment to the scheduling system of the target power station; a scheduling module is used to receive the scheduling power of the target power station from the scheduling system, so that the target power station can schedule the thermal power unit, the wind turbine unit and the photovoltaic unit to jointly output according to the scheduling power; wherein the scheduling power is obtained by the scheduling system based on the power feasible domain of multiple power stations including the target power station at the next scheduling moment through flow calculation.

[0015] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements a scheduling method for a power supply station in an integrated wind, solar and thermal industrial park as described in any one of the above-mentioned methods.

[0016] The present invention also provides a non-transitory computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the scheduling method of the wind, solar and thermal integrated industrial park power supply station as described in any of the above-mentioned methods is implemented.

[0017] The present invention also provides a computer program product, including a computer program, which, when executed by a processor, implements the scheduling method for a power supply station in an integrated wind, solar and thermal industrial park as described in any one of the above-mentioned methods.

[0018] The method and device for dispatching a power supply station in an integrated wind, solar and thermal industrial park provided by the present invention determine the feasible active domain of the thermal power unit at the next dispatching time according to the output range and climbing capacity of the thermal power unit of the target power supply station at the current time, with respect to the dispatching time; determine the feasible active domain of the wind turbine unit at the next dispatching time according to the maximum available wind power output and minimum utilization rate of the wind turbine unit of the target power supply station at the next dispatching time; and determine the reactive power feasible domain of the wind turbine unit at the next dispatching time according to the feasible active domain of the wind turbine unit at the next dispatching time, the electrical operating characteristic parameters of the wind turbine body and the capacity of the grid-side converter; and determine the feasible reactive domain of the wind turbine at the next dispatching time according to the feasible active domain of the wind turbine unit at the next dispatching time. The maximum available output and the minimum utilization rate of photovoltaic units of the target power station at the next dispatching moment determine the active feasible domain of photovoltaic units at the next dispatching moment. According to the active feasible domain of photovoltaic units at the next dispatching moment and the capacity of photovoltaic inverters in photovoltaic units, the reactive feasible domain of photovoltaic units at the next dispatching moment is determined; according to the active feasible domain and reactive feasible domain of thermal power units at the next dispatching moment, the active feasible domain and reactive feasible domain of wind turbine units at the next dispatching moment, and the active feasible domain and reactive feasible domain of photovoltaic units at the next dispatching moment, the power feasible domain of the target power station at the next dispatching moment is determined. Since the climbing ability constraint of thermal power units under variable load is taken into account, the active feasible domain of thermal power units at the next dispatching moment can be obtained accurately and executable. By taking into account the sequential operation status and physical characteristics of different power sources, the feasible domain of active and reactive power when multiple power sources are aggregated in the wind-solar-fire integrated industrial park under a given dispatching time scale is more accurately portrayed, which improves the accuracy of the optimized operation of the industrial park and realizes the efficient interaction between the wind-solar-fire integrated industrial park and the power grid it is connected to. This enables efficient and accurate estimation of the power feasible domain of the power supply station in the wind-solar-fire integrated industrial park under a given dispatching time scale, and dispatches the power supply station in the wind-solar-fire integrated industrial park based on the power feasible domain of the power supply station in the wind-solar-fire integrated industrial park. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a flow chart of the dispatching method of the wind, solar and thermal integrated industrial park power supply station provided by the present invention.

[0021] Figure 2 It is a flow chart of a method for determining a power feasible region of a thermal power unit provided by the present invention.

[0022] Figure 3 It is a flow chart of a method for determining a power feasible region of a wind turbine unit provided by the present invention.

[0023] Figure 4 It is a flow chart of a method for determining a feasible power region of a photovoltaic unit provided by the present invention.

[0024] Figure 5 This is the grid structure diagram of the power station in the wind, solar and thermal integrated industrial park.

[0025] Figure 6 It is a schematic diagram of the feasible domain of the power sequence power of the power supply station of the wind, solar and thermal integrated industrial park provided by the present invention.

[0026] Figure 7 It is a schematic diagram of the feasible domain of active power at adjacent moments corresponding to different scheduling durations of a thermal power unit provided by the present invention.

[0027] Figure 8 It is a schematic diagram of the feasible domain of overall active and reactive power of a thermal power unit provided by the present invention.

[0028] Fig. 9 This is a chart of actual operating data of large thermal power units every minute for one year.

[0029] Fig.10 It is a schematic diagram of the feasible domain of active power of a wind turbine unit at adjacent moments provided by the present invention.

[0030] Fig.11 It is a schematic diagram of the feasible domain of the overall active and reactive power of the wind turbine unit provided by the present invention.

[0031] Fig.12 It is a schematic diagram of the feasible domain of overall active and reactive power of the photovoltaic unit provided by the present invention.

[0032] Fig.13 It is a structural schematic diagram of the dispatching device of the wind, solar and thermal integrated industrial park power supply station provided by the present invention.

[0033] Fig.14 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] The feasible domain of sequential power refers to the range or limit of active and reactive power output that can be achieved by each power source in the power system or industrial park within a given time series or dispatch cycle while meeting various physical constraints and safe operating conditions. This feasible domain changes with time and reflects the output capacity and limitations of the power source in different time periods.

[0036] The feasible domain of the sequential power of wind turbine units, photovoltaic units and thermal power units in the power station of the wind, solar and thermal integrated industrial park is as follows: Figure 6 As shown. The purpose of determining this feasible domain is to enable the industrial park to accurately provide the dispatching department with the upper and lower limits of the overall active and reactive output after power aggregation, so that the dispatching department can calculate the flow according to these upper and lower limits and determine the overall dispatching power of the industrial park. Based on the time-sequence power feasible domain, the large power grid and the power supply station of the industrial park can be decoupled, which not only simplifies the process of calculating the flow and determining the power demand of the dispatching department, but also promotes the collaborative work of different power sources in the industrial park to jointly improve the economy and efficiency. Therefore, when establishing the time-sequence power feasible domain of the power supply station of the industrial park, it is necessary to comprehensively consider the active and reactive output regulation capability constraints of its internal power supply and the time-sequence operation constraints to ensure that it can reliably meet the overall dispatching power demand through output regulation.

[0037] In the embodiment provided by the present invention, the overall power of the industrial park at time t is The sum of the active and reactive outputs of each power source within it. The feasible domain of the industrial park at time t+1 The overall active and reactive output range upper and lower limits are obtained by aggregating the output, ramping constraints, output range constraints of the power supply within the industrial park at time t, and the predicted output and regulation range constraints of new energy at time t+1. The overall dispatching power demand of the industrial park at time t+1 For the power grid dispatching department, according to the feasible domain , load demand, and flow constraint calculations.

[0038] Combine the following Figure 1-Figure 12 The present invention describes the dispatching method of the wind, solar and thermal integrated industrial park power supply station.

[0039] Figure 1It is a flow chart of the dispatching method of the wind, solar and thermal integrated industrial park power station provided by the present invention, such as Figure 1 As shown, the method includes the following: Step 101: for the scheduling duration, according to the output range and climbing capacity of the thermal power units of the target power station at the current moment, determine the active feasible domain of the thermal power units at the next scheduling moment, and according to the electrical operation characteristic parameters of the thermal power units, determine the reactive feasible domain of the thermal power units at the next scheduling moment.

[0040] The scheduling duration is the time difference between the next scheduling time and the current time.

[0041] The target power station is the power station of the wind, solar and thermal integrated industrial park to be dispatched. The wind, solar and thermal integrated industrial park refers to a comprehensive energy system that integrates multiple energy generation methods such as wind power, solar power and thermal power generation in a specific industrial park. This park achieves clean, efficient and stable energy supply by optimizing the power generation, transmission, distribution and storage of various energy sources, while promoting the sustainable development of the industrial park.

[0042] For a specific embodiment of determining the active feasible domain of the thermal power unit at the next scheduling time according to the output range and climbing capacity of the thermal power unit of the target power station at the current time, and determining the reactive feasible domain of the thermal power unit at the next scheduling time according to the electrical operation characteristic parameters of the thermal power unit, see Figure 2 The relevant content in will not be repeated here.

[0043] Step 102: Determine the active feasible domain of the wind turbine unit at the next scheduling moment according to the maximum available wind power output and minimum utilization rate of the wind turbine unit at the target power station at the next scheduling moment, and determine the reactive feasible domain of the wind turbine unit at the next scheduling moment according to the active feasible domain of the wind turbine unit at the next scheduling moment, the electrical operating characteristic parameters of the wind turbine body and the capacity of the grid-side converter.

[0044] For a specific example of this step, see Figure 3 The relevant content in will not be repeated here.

[0045] Step 103: Determine the active feasible domain of the photovoltaic unit at the next scheduling moment according to the maximum available output of the photovoltaic unit of the target power source station at the next scheduling moment and the minimum photovoltaic utilization rate; determine the reactive feasible domain of the photovoltaic unit at the next scheduling moment according to the active feasible domain of the photovoltaic unit at the next scheduling moment and the capacity of the photovoltaic inverter in the photovoltaic unit.

[0046] For a specific embodiment of this step, see Figure 4 The relevant content in will not be repeated here.

[0047] Step 104: Determine the power feasible domain of the target power source station at the next scheduling moment according to the active feasible domain and reactive feasible domain of the thermal power unit at the next scheduling moment, the active feasible domain and reactive feasible domain of the wind turbine unit at the next scheduling moment, and the active feasible domain and reactive feasible domain of the photovoltaic unit at the next scheduling moment.

[0048] During the specific implementation process, the upper limit value of the active feasible domain of the target power station at the next scheduling moment is determined based on the upper limit value of the active feasible domain of the thermal power units at the next scheduling moment, the upper limit value of the active feasible domain of the wind turbine units at the next scheduling moment, and the upper limit value of the active feasible domain of the photovoltaic units at the next scheduling moment.

[0049] During the specific implementation process, the lower limit value of the active feasible domain of the target power station at the next scheduling moment is determined based on the lower limit value of the active feasible domain of the thermal power units at the next scheduling moment, the lower limit value of the active feasible domain of the wind turbine units at the next scheduling moment, and the lower limit value of the active feasible domain of the photovoltaic units at the next scheduling moment.

[0050] During the specific implementation process, the upper limit value of the reactive power feasible domain of the target power station at the next scheduling moment is determined based on the upper limit value of the reactive power feasible domain of the thermal power unit at the next scheduling moment, the upper limit value of the reactive power feasible domain of the wind turbine unit at the next scheduling moment, and the upper limit value of the reactive power feasible domain of the photovoltaic unit at the next scheduling moment.

[0051] During the specific implementation process, the lower limit value of the reactive power feasible domain of the target power station at the next scheduling moment is determined based on the lower limit value of the reactive power feasible domain of the thermal power unit at the next scheduling moment, the lower limit value of the reactive power feasible domain of the wind turbine unit at the next scheduling moment, and the lower limit value of the reactive power feasible domain of the photovoltaic unit at the next scheduling moment.

[0052] Combined with formulas (5), (11) and (14) (for formulas (1) to (14) see Figure 2 , Figure 3 as well as Figure 4 The power feasible domain of the target power station at the next dispatching time It is expressed as follows (for the convenience of description, in the following formula, t-1 represents the current time, and t represents the next scheduling time): (15) in, (MW) and (MW) is the feasible active and reactive power domains of the target power station at the next scheduling moment.

[0053] For the next dispatching moment, the active output of each power source , , Is to be determined, the power supply's reactive capacity boundary will be affected. Specifically, in the reactive-active power relationship formula of the power supply given by the present invention, the reactive-active power relationship is a decreasing function when reactive power is emitted, and the reactive-active power relationship is an increasing function when reactive power is absorbed. Therefore, when the active output of the power supply is lower, its reactive capacity will be stronger and the reactive output range will be wider (that is, it can emit or absorb more reactive power). Therefore, the timing power feasible domain of the target power supply station needs to consider the impact of the active output of the power supply on the reactive capacity. Since the monotonicity of functions with the same monotonicity remains unchanged after addition, the total reactive capacity boundary of the target power supply station decreases with the increase of total active power. Considering the extreme case, when the active output of each power supply takes the maximum value in the feasible domain corresponding to its time t, The total reactive capacity boundary of the target power station should be the minimum. On the contrary, when the active output of each power source takes the minimum value in the feasible region corresponding to time t, The minimum, the target power station total reactive capacity boundary is the largest. From the perspective of actual operation, since the active output of the power source in the target power station needs to be issued by the dispatching department as a whole At the same time, the economic efficiency related to active power in the target power station is the focus of the operator. Therefore, the present invention considers that the power feasible domain provided by the target power station to the dispatching department is The reactive power part should be conservative, so as to ensure that the active power of each power source in the industrial park can have sufficient adjustment space: (16) Since the target power station aggregates multiple power sources, among which wind power and photovoltaic power are connected to the grid through converters or inverters, the reactive power support methods are diverse; wind and photovoltaic power generation usually do not have output peaks at the same time, and when the wind and photovoltaic outputs are high, thermal power will generally reduce output peak regulation. In summary, according to the conservative power feasible domain, the target power station can generally provide sufficient reactive power for the system through the grid connection point.

[0054] Step 105: Report the power feasible region of the target power station at the next scheduling moment to the scheduling system of the target power station.

[0055] Step 106: Receive the dispatching power of the target power station from the dispatching system, so that the target power station dispatches the thermal power units, wind turbine units and photovoltaic units to jointly output according to the dispatching power; wherein the dispatching power is obtained by the dispatching system based on the power feasible domain of multiple power stations including the target power station at the next dispatching moment through flow calculation.

[0056] exist Figure 5In the operation mode of the power supply station of the wind, solar and fire integrated industrial park shown, the wind, solar and fire integrated industrial park is connected to the large power grid at the same grid connection point. At this time, the power grid dispatching department no longer directly dispatches the power output within the industrial park, but provides the overall dispatching power demand to the industrial park control center. To meet this demand, the industrial park control center needs to dispatch the internal power output under the premise of economic operation to ensure that the sum of the power of each power source meets the overall dispatching power requirement. In order to assist the dispatching department to more accurately determine the overall dispatching power demand of each industrial park, each industrial park can use the embodiment provided by the present invention to efficiently and accurately estimate the overall power feasible domain of the power supply station of the wind, solar and fire integrated industrial park under a given dispatching time scale, and submit its estimated overall power feasible domain to the dispatching department. The dispatching department combines the overall power feasible domain of the power supply station of the wind, solar and fire integrated industrial park and the output constraints of other independent power supply stations to determine the overall dispatching power demand of the power supply station of the wind, solar and fire integrated industrial park through flow calculation.

[0057] Figure 2 FIG. 1 is a flow chart of a method for determining a power feasible region of a thermal power unit provided by the present invention, such as Figure 2 As shown, the method includes the following steps.

[0058] Step 201: for the scheduling duration, according to the output range and climbing capability of the thermal power units of the target power station at the current moment, determine the active feasible domain of the thermal power units at the next scheduling moment.

[0059] Generally speaking, for a maximum output Thermal power units , when it is t Always make contributions When the (MW) is higher than a certain threshold, it is said to be in the regular peak regulation (RPR) state. This threshold is called the minimum output of regular peak regulation and is recorded as (MW). When thermal power units are operating normally, they are mainly in a conventional peak regulation state, during which the units have good performance and efficiency. In order to enhance the ability of thermal power units to smooth out fluctuations in renewable energy, the output of thermal power units after technical transformation can be lower than the minimum output threshold of conventional peak regulation. This operating state is called deep peak regulation (DPR, deep peak regulation) state. When a thermal power unit is operating in a deep peak regulation state, the amount of coal fed into the unit is reduced, and additional technical means are required to maintain stable operation, which may lead to increased losses and reduced performance. To ensure operational safety, thermal power units have a minimum output in the deep peak regulation state. (MW). In summary, the overall output range of thermal power units is: (1-1) In some embodiments, the scheduling duration is less than a first duration threshold; wherein the first duration threshold is the ratio of the difference between the minimum output of the thermal power unit under conventional peak-shaving state and the minimum output under deep peak-shaving state, and the second maximum climbing rate, the second maximum climbing rate is the maximum climbing rate of the thermal power unit under deep peak-shaving state.

[0060] In this embodiment, the active power feasible region of the thermal power group at the next scheduling moment can be determined according to the output range of the thermal power group at the current moment in the following manner.

[0061] When the output range of the thermal power unit at the current moment is within the first output range, the active power feasible region of the thermal power unit at the next scheduling moment is determined to be the first active power feasible region.

[0062] Among them, the first output range takes the maximum output of the thermal power unit as the upper boundary, and takes the maximum output of the thermal power unit minus the product of the first maximum climbing rate and the scheduling time as the lower boundary, and the first maximum climbing rate is the maximum climbing rate of the thermal power unit under the conventional peak-shaving state; the first active feasible domain takes the output of the thermal power unit at the current moment minus the product of the first maximum climbing rate and the scheduling time as the lower boundary, and takes the output of the thermal power unit at the current moment plus the product of the first maximum climbing rate and the scheduling time as the upper boundary.

[0063] When the output range of the thermal power generation unit at the current moment is within the second output range, the active power feasible domain of the thermal power generation unit at the next scheduling moment is determined to be the second active power feasible domain.

[0064] Among them, the second output range takes the maximum output of the thermal power unit minus the product of the first maximum climbing rate and the scheduling time as the upper boundary, and takes the minimum output of the thermal power unit under the conventional peak-shaving state minus the product of the second maximum climbing rate and the scheduling time as the lower boundary, and the second maximum climbing rate is the maximum climbing rate of the thermal power unit under the deep peak-shaving state; the second active feasible domain is, when the thermal power unit is in the second output range and is constrained by the first maximum climbing rate and the second maximum climbing rate, the range formed by the upper limit value and the lower limit value of the output that can be achieved after the scheduling time.

[0065] When the output range of the thermal power unit at the current moment is within the third output range, the active power feasible region of the thermal power unit at the next scheduling moment is determined to be the third active power feasible region.

[0066] Among them, the third output range takes the minimum output of the thermal power unit under the conventional peak-shaving state as the upper boundary, and takes the minimum output of the thermal power unit under the conventional peak-shaving state minus the product of the second maximum climbing rate and the scheduling time as the lower boundary; the third active feasible domain takes the output of the thermal power unit at the current moment minus the product of the second maximum climbing rate and the scheduling time as the lower boundary, and takes the output of the thermal power unit at the current moment plus the product of the second maximum climbing rate and the scheduling time as the upper boundary.

[0067] Among them, the output of the thermal power unit at the current moment meets the output constraint range; among them, the output constraint range takes the maximum output of the thermal power unit as the upper boundary and the minimum value of the thermal power unit in the deep peak regulation state as the lower boundary, as shown in formula (1-1).

[0068] In some embodiments, the scheduling duration is greater than a first duration threshold and less than a second duration threshold; wherein the second duration threshold is the difference between the maximum output of the thermal power unit and the minimum output under conventional peak-shaving conditions divided by the first maximum climbing rate.

[0069] In this embodiment, the active power feasible region of the thermal power group at the next scheduling moment can be determined according to the output range of the thermal power group at the current moment in the following manner.

[0070] When the output range of the thermal power unit at the current moment is within the first output range, the active power feasible region of the thermal power unit at the next scheduling moment is determined to be the first active power feasible region.

[0071] When the output range of the thermal power unit at the current moment is within the second output range, the active power feasible domain of the thermal power unit at the next scheduling moment is determined to be the second active power feasible domain.

[0072] The third duration threshold is expressed by the following formula: ; (1-2) in, The scheduling duration; is the maximum output of the thermal power unit; is the first maximum climbing rate; is the second largest climbing rate; It is the minimum output of thermal power units under deep peak load regulation; It is the minimum output of thermal power units under conventional peak load regulation conditions.

[0073] In this embodiment, when the output range of the thermal power generation group at the current moment is within the second output range, the active power feasible region of the thermal power generation group at the next scheduling moment is determined to be the second active power feasible region.

[0074] In some embodiments, the scheduled duration is greater than a third duration threshold.

[0075] In this embodiment, the active power feasible region of the thermal power group at the next scheduling moment can be determined according to the output range of the thermal power group at the current moment in the following manner.

[0076] The feasible domain of the active power of the thermal power unit at the next scheduling moment takes the maximum output of the thermal power unit as the upper boundary and the minimum value of the thermal power unit in the deep peak regulation state as the lower boundary.

[0077] According to the operation test in the existing research, the maximum climbing rate of the thermal power unit will decrease in the deep peak-shaving state. The present invention uses the first maximum climbing rate as the maximum climbing rate of the thermal power unit in the conventional peak-shaving state and the deep peak-shaving state and the second maximum climbing rate The unit is (MW / min). The characteristic of thermal power units with different ramp rates in different operating states is called step ramp characteristics. t and the next scheduling time t +1 (the scheduling time is In order to present the results intuitively, this manual uses the active feasible domain in minutes (min) which is related to the step climbing characteristics, the output range in different states and the selection of time scale.

[0078] In the specific implementation process, the possible output of the thermal power unit at the current moment (the minimum to maximum output under the deep peak regulation state) can be used as the horizontal coordinate, and the possible output of the thermal power unit at the next scheduling moment can be used as the vertical coordinate to establish a power feasible domain coordinate system. Since the maximum output power that can be changed by the thermal power unit is the product of the maximum ramp rate and the scheduling duration, the feasible domain marked in the power feasible domain coordinate system is different for different scheduling durations. The longer the scheduling duration, the larger the feasible domain. For example, if the scheduling duration is 0, the output of the thermal power unit at the current moment and the next scheduling moment is the same, which is a 45° oblique line in the power feasible domain coordinate system.

[0079] When the scheduling time increases, for different scheduling times and maximum ramp rates (including the first maximum ramp rate and the second maximum ramp rate), calculate the maximum output that can be increased and the minimum output that can be reduced under each possible output of the thermal power unit at the current moment after the scheduling time. Then, the minimum and maximum output values ​​that can be achieved at the next scheduling moment corresponding to each different output of the thermal power unit from small to large at the current moment are marked in the power feasible domain coordinate system, and the boundary of the power feasible domain of the thermal power unit at the next scheduling moment can be obtained (such as Figure 7 In the figure, curves of different colors form different frame lines), and the points within the boundaries are the outputs that the thermal power units may achieve at the next scheduling moment.

[0080] With one For example, the output ranges of the thermal power units in the conventional peak-shaving state and the deep peak-shaving state are and ,Right now , The first maximum climbing rate is =9 MW / min, the second maximum ramp rate is =6 MW / min, then its dispatching time The feasible domains for the time scales of 15, 30 and 60 minutes are as follows: Figure 7 As shown in the figure, since the maximum climbing rate in the deep peak-shaving state is lower than that in the conventional peak-shaving state, when When the time is less than 60 min, the feasible area of ​​the thermal power unit is wide in the upper right and narrow in the lower left. =15 min, the feasible region of the adjacent moments of the thermal power unit presents a non-convex characteristic. According to the parameters of this thermal power unit, combined with the active feasible region diagram, =15 min, the mathematical model of the active feasible region can be expressed as follows: (2) Among them, situation ① represents the current output of thermal power units When the thermal power unit is within the first output range, the output range of the thermal power unit at the next dispatching time may only be in the conventional peak-shaving state, and the active power feasible domain at the next dispatching time is only affected by the first maximum ramp rate. constraint.

[0081] Case ② indicates the current output of thermal power units When in the second output range, the output range of the thermal power unit at the next dispatching time may cover the conventional peak-shaving and deep peak-shaving states, and the active power feasible domain at the next dispatching time is also affected by the first maximum ramp rate. and the second maximum climbing rate constraints.

[0082] Case ③ indicates the current output of thermal power units When in the third output range, the output range of the thermal power unit at the next dispatching time may only be in the deep peak-shaving state, and the active power feasible domain at the next dispatching time is only affected by the second maximum ramp rate. constraint.

[0083] The above-mentioned feasible domain model of active power generation units is applicable to the case where the dispatching duration is less than the first duration threshold ( ) situation, indicating Less than the active output range of thermal power units in deep peak regulation state .

[0084] If the scheduling duration is greater than the first duration threshold and less than the second duration threshold, that is, ,at this time It is greater than the active output range of deep peak regulation of thermal power units. At this time, the active feasible domain model of thermal power units should delete the above situation ③ and related constraints, and only retain situations ① and ② except the overall output range constraints.

[0085] If the scheduling duration is greater than the second duration threshold and less than the third duration threshold, that is, and ,at this time Larger than the conventional peak load regulation range of thermal power units At this time, the feasible domain model of the active power of thermal power units should delete situations ① and ③ and related constraints, and only retain situation ② except for the overall output range constraint.

[0086] If the scheduling duration is greater than the third duration threshold, that is, At this time, the thermal power unit is The output can be adjusted arbitrarily within its overall output range within the time period. At this time, the feasible domain model of the active power of the thermal power unit should delete situations ①②③ and related constraints, and only retain the overall output range constraints.

[0087] The above content illustrates the relationship between the active feasible domain of thermal power units and the maximum ramp rate in different operating states, the output range in different operating states, and the scheduling time scale. The results show that when the time scale and the overall output range are constant, the better the ramp performance, the more likely the active feasible domain is to be simplified. In addition, a long scheduling time scale and a smaller overall output range may also simplify the active feasible domain. For ease of reading, the present invention uses and The output range of the thermal power unit in equation (1) and the climbing constraints of the thermal power unit at adjacent moments in equation (2) constitute the upper and lower limits of the active output range. The above analysis and modeling process are also applicable to other thermal power units. In addition, if the maximum climbing rate of the thermal power unit can be divided into more stages with the output change, the analysis method is also applicable.

[0088] Step 202: According to the maximum value of the stator current and the terminal voltage of the thermal power unit, a stator heating operation limit constraint of the thermal power unit is established to obtain the first reactive capacity boundary of the thermal power unit when operating in a delayed phase.

[0089] The present invention considers that thermal power units are operated in industrial parks that include large-scale wind power and photovoltaic power generation bases. Since different power sources are connected to the grid through the same grid connection point, the reactive power of different power sources in the industrial park can provide support to each other, and large-scale wind power and photovoltaic power generation bases can usually provide sufficient reactive power support through their own power electronic interfaces with the grid. Therefore, the reactive power feasible domain of thermal power units in the present invention does not consider stability constraints, and it is believed that there is no restriction on the regulation capacity of reactive power at adjacent moments in the studied time scale.

[0090] Thermal power units are usually hidden-pole units, and their reactive output is (MVar), in the late phase operation ( When the thermal power unit sends reactive power to the grid, its reactive power is mainly constrained by the stator heating operation limit, and its active / reactive power diagram is a circle with its center at the origin: (3) in, is the maximum value of stator current (pu), is the terminal voltage (pu), is the capacity of the thermal power unit (MVA), is the active power of the thermal power unit at the current moment.

[0091] The present invention uses Represents the active and reactive relationship in formula (3), which is used to describe the capacity (MVA), power is The first powerless capacity boundary of the thermal power unit when operating in delayed phase, that is, the right side of the inequality in the formula.

[0092] Step 203: According to the terminal voltage of the thermal power unit, the synchronous reactance of the generator and the external equivalent reactance, the second reactive capacity boundary of the thermal power unit in the leading phase operation is obtained.

[0093] When the thermal power unit absorbs reactive power from the power grid during phase leading operation, , its reactive power and terminal voltage , Generator synchronous reactance (pu) and external equivalent reactance (pu), its active / reactive image is a circle with its center on the positive half axis of the reactive coordinate axis: (4) Accordingly, the present invention uses It represents the reactive-active relationship in formula (4), which is used to describe the second reactive capacity boundary of the thermal power unit during phase leading operation.

[0094] Step 204: Determine the reactive power feasible region of the thermal power unit at the next scheduling moment according to the first reactive power boundary and the second reactive power boundary.

[0095] In the specific implementation process, the first reactive capacity boundary is used as the upper limit value of the reactive feasible domain of the thermal power unit at the next scheduling moment, and the second reactive capacity boundary is used as the lower limit value of the reactive feasible domain of the thermal power unit at the next scheduling moment.

[0096] The thermal power units in the industrial park considered by the present invention are mainly large thermal power units. The actual operating data of a 600 MW large thermal power unit in an industrial park per minute for one year is as follows: Fig. 9As shown. As can be seen from the figure, large thermal power units are currently the main power source for power supply, usually in a continuous operation state, with downtime of more than 1 week, and there is no frequent start and stop. Such a long shutdown is usually based on a plan made in advance, rather than a day-ahead scheduling result. Therefore, in the modeling based on day-ahead optimization of the present invention, the thermal power units do not consider the start and stop related models, and the influence of the start and stop status is not considered in the corresponding power feasible domain. When it comes to continuous long-term optimization, the start and stop related constraint equations are considered and listed separately.

[0097] Combining equations (1)-(4) and related analysis, the feasible domain of the time sequence active and reactive power of thermal power units is: (5) Considering the active power output range formula (1) and reactive power constraint formulas (3) and (4) at the same time, the overall active and reactive power feasible domain of the thermal power unit is shown as follows: Figure 8 As shown, different thermal power units are affected by different parameters and performance.

[0098] Figure 3 is a flow chart of a method for determining a power feasible region of a wind turbine unit provided by the present invention, such as Figure 3 As shown, the method includes the following steps.

[0099] Step 301: Determine the active feasible region of the wind turbine unit at the next scheduling moment according to the maximum available wind power output and minimum utilization rate of the wind turbine unit of the target power station at the next scheduling moment.

[0100] Large wind farms in industrial parks contain multiple wind turbine units, which are connected to the large power grid after being collected by collector lines and boosted by transformers. The present invention takes a large wind farm containing double-fed wind turbines as an example of feasible domain modeling. The feasible domain modeling process of wind farms containing other types of wind turbines is similar, with only the reactive-active relationship being different. The maximum active power that can be output by wind power at different times is related to natural factors and cannot be controlled artificially, but the actual output can be adjusted downward by abandoning wind.

[0101] Due to the uncertainty of wind power output, t Maximum available output of the wind turbine unit at the moment (maximum output of the unit when the station is in operation without considering any unnatural conditions) (MW) may be different from the output forecast value at that time (MW) is different. Generally speaking, the shorter the forecast time, the smaller the difference between the two. Considering wind curtailment regulation, wind power t The active feasible domain at the moment is as follows: (6) in, (MW) is the actual wind power output, The minimum utilization rate of wind power is used to limit the maximum power reduction and avoid energy waste. It is the maximum available output of the fan unit.

[0102] Fig.10 is the feasible domain of the wind turbine unit at adjacent times. The dotted line in the figure represents the theoretical output range of the wind turbine unit [0, ,in (MW) is the maximum output related to the installed capacity of the wind farm; the solid line in the figure shows an example of wind power output. At the current moment and the next scheduling moment, the active power feasible domain of the wind turbine unit is limited to and .

[0103] Step 302: Determine the reactive power feasible region of the wind turbine body according to the characteristic parameters of the stator of the wind turbine unit and the rotor current constraint.

[0104] When the fan unit generates reactive power, the fan unit itself outputs reactive power. The (MVar) constraints are: (7) in, is the magnetizing reactance, and are the stator resistance and reactance, is the stator voltage, is the maximum current of the rotor-side converter, all of which are expressed in per-unit values; (MVA) is the installed capacity of wind power, is the wind power slip rate.

[0105] When the fan unit absorbs reactive power, the reactive power absorption constraint of the fan unit itself is: (8) in, is the maximum current of the stator-side converter, are the rotor resistances, all of which adopt per unit values.

[0106] Wind power slip rate It is related to the ratio of the rotor speed to the stator speed. It usually decreases from a positive number to a negative number as the active output of the fan increases. The active output of the fan can be directly used to approximate the slip rate through curve fitting. The functional relationship is recorded as .

[0107] Step 303: Determine the reactive support provided by the wind turbine grid-side converter according to the capacity of the grid-side converter, the wind power slip rate, and the predicted wind power output of the wind turbine unit at the next scheduling moment.

[0108] The grid-side converter of the wind turbine can provide additional reactive power support outside the wind turbine body, and the corresponding reactive power constraint is: (9) in, (MW) is the reactive power output of the grid-side converter of the wind turbine. (MVA) is the capacity of the grid-side converter, which is usually 30% of the total wind power capacity.

[0109] Step 304: Based on the reactive feasible region of the wind turbine body and the reactive support provided by the grid-side converter of the wind turbine, determine the reactive feasible region of the wind turbine at the next scheduling moment.

[0110] In the specific implementation process, the upper limit value of the reactive power feasible domain of the wind turbine unit can be determined according to the sum of the boundary of the reactive power emitted by the wind turbine unit body and the upper limit value of the additional reactive power support provided by the grid-side converter; the lower limit value of the reactive power feasible domain of the wind turbine unit can be determined according to the sum of the boundary of the reactive power absorbed by the wind turbine unit body and the lower limit value of the additional reactive power support provided by the grid-side converter.

[0111] As an example only, use and Indicates the upper boundary of the wind turbine unit when it generates reactive power as a whole and the lower boundary of the wind turbine unit when it absorbs reactive power. The boundary of reactive power generated by the wind turbine body is expressed as (7) using Expressing the boundary of reactive power absorption of the wind turbine body in equation (8), we have: (10) The overall active and reactive feasible domain of the wind turbine unit is shown as follows: Fig.11 As shown in the figure, the actual feasible region may be different due to the influence of wind turbine parameters.

[0112] Combining formulas (6)-(10), the feasible active and reactive domains of the wind turbine unit at the next dispatching time are: (11) Figure 4 is a flow chart of a method for determining a feasible power region of a photovoltaic unit provided by the present invention, such as Figure 4 As shown, the method includes the following steps.

[0113] Step 401: Determine the active feasible region of the photovoltaic unit at the next scheduling moment according to the maximum available output of the photovoltaic unit of the target power station at the next scheduling moment and the minimum photovoltaic utilization rate.

[0114] The photovoltaic power generation in the power supply station of the wind, solar and thermal integrated industrial park is a centralized photovoltaic power station. The power station contains multiple photovoltaic arrays. After they are collected by the combiner box, they are connected to the centralized photovoltaic inverter in a single or multi-channel form, converted into industrial frequency AC power and connected to the grid. Similar to the wind turbine unit, the maximum active output of the photovoltaic unit at each moment is related to natural factors and cannot be controlled artificially, but can only be predicted. Predicted output (MW) and maximum available output (MW) may be different, and the present invention can also use the method of abandoning light to adjust downward. The feasible domain of (MW) is: (12) in, The minimum utilization rate of photovoltaic power generation is used to limit the reduction of photovoltaic power generation.

[0115] The feasible domain of photovoltaic power generation at the next dispatching time includes the theoretical output range [0, ,in (MW) is the maximum output related to the installed capacity of the photovoltaic power station; at the current moment and the next scheduling moment, the feasible domain of photovoltaic active power is also limited by and .

[0116] Step 402: Determine the reactive power feasible region of the photovoltaic group at the next scheduling moment according to the active power feasible region of the photovoltaic group at the next scheduling moment and the capacity of the photovoltaic inverter in the photovoltaic group.

[0117] There is no rotating equipment in the photovoltaic power station. The photovoltaic panels directly convert solar energy into direct current. The present invention considers it as the active and reactive power relationship based on the original equation, and is limited by the inverter capacity: (13) in, is the capacity of the PV inverter, usually slightly higher than .

[0118] The present invention uses and represents the PV reactive output boundary on the left and right sides of the inequality in the above formula.

[0119] The overall active and reactive feasible domain of the photovoltaic unit is shown as follows: Fig.12 shown.

[0120] Combining equations (11)-(13), the feasible active and reactive domains of the photovoltaic unit at the next scheduling time are: (14) The dispatching device of the wind, solar and fire integrated industrial park power supply station provided by the present invention is described below. The dispatching device of the wind, solar and fire integrated industrial park power supply station described below and the dispatching method of the wind, solar and fire integrated industrial park power supply station described above can be referred to each other.

[0121] Fig.13 This is a schematic diagram of the structure of the dispatching device of the wind, solar and thermal integrated industrial park power supply station provided by the present invention. Fig.13 As shown, the device 1300 includes the following modules.

[0122] The first determination module 1310 is used to determine the active feasible domain of the thermal power group at the next scheduling moment according to the output range and climbing ability of the thermal power group of the target power station at the current moment, and to determine the reactive feasible domain of the thermal power group at the next scheduling moment according to the electrical operation characteristic parameters of the thermal power group; wherein the scheduling time is the time difference between the next scheduling moment and the current moment, and the target power station is a power station of a wind, solar and thermal integrated industrial park.

[0123] The second determination module 1320 is used to determine the active feasible domain of the wind turbine unit at the next scheduling moment according to the maximum available wind power output and the minimum utilization rate of the wind turbine unit of the target power station at the next scheduling moment, and to determine the reactive feasible domain of the wind turbine at the next scheduling moment according to the active feasible domain of the wind turbine unit at the next scheduling moment, the electrical operating characteristic parameters of the wind turbine body and the capacity of the grid-side converter.

[0124] The third determination module 1330 is used to determine the active feasible domain of the photovoltaic group at the next scheduling moment according to the maximum available output of the photovoltaic group of the target power station at the next scheduling moment and the minimum photovoltaic utilization rate, and to determine the reactive feasible domain of the photovoltaic group at the next scheduling moment according to the active feasible domain of the photovoltaic group at the next scheduling moment and the capacity of the photovoltaic inverter in the photovoltaic group.

[0125] The fourth determination module 1340 is used to determine the power feasible domain of the target power source station at the next scheduling moment based on the active feasible domain and reactive feasible domain of the thermal power unit at the next scheduling moment, the active feasible domain and reactive feasible domain of the wind turbine unit at the next scheduling moment, and the active feasible domain and reactive feasible domain of the photovoltaic unit at the next scheduling moment.

[0126] The reporting module 1350 is used to report the power feasible region of the target power station at the next scheduling moment to the scheduling system of the target power station.

[0127] The scheduling module 1360 is used to receive the scheduling power of the target power station from the scheduling system, so that the target power station can schedule the thermal power unit, the wind turbine unit and the photovoltaic unit to jointly output power according to the scheduling power; wherein the scheduling power is obtained by the scheduling system based on the power flow calculation of multiple power stations including the target power station at the next scheduling moment.

[0128] Fig.14 An example of a physical structure diagram of an electronic device is shown in FIG. Fig.14As shown, the electronic device may include: a processor 1410, a communications interface 1420, a memory 1430 and a communication bus 1440, wherein the processor 1410, the communications interface 1420 and the memory 1430 communicate with each other via the communication bus 1440. The processor 1410 may call the logic instructions in the memory 1430 to execute a scheduling method for a power supply station in a wind-solar-thermal integrated industrial park, the method comprising: for the scheduling duration, according to the output range and climbing ability of the thermal power unit of the target power supply station at the current moment, determining the active feasible domain of the thermal power unit at the next scheduling moment, and according to the electrical operation characteristic parameters of the thermal power unit, determining the reactive feasible domain of the thermal power unit at the next scheduling moment; wherein the scheduling duration is the time difference between the next scheduling moment and the current moment, The target power station is a power station in an integrated wind, solar and thermal industrial park; according to the maximum available wind power output and minimum utilization rate of the wind turbine unit of the target power station at the next scheduling moment, the active feasible domain of the wind turbine unit at the next scheduling moment is determined; and according to the active feasible domain of the wind turbine unit at the next scheduling moment, the electrical operating characteristic parameters of the wind turbine body and the capacity of the grid-side converter, the reactive feasible domain of the wind turbine at the next scheduling moment is determined; according to the maximum available output of the photovoltaic unit of the target power station at the next scheduling moment and the minimum utilization rate of photovoltaic power, determine the active feasible domain of the photovoltaic unit at the next scheduling moment, and determine the reactive feasible domain of the photovoltaic unit at the next scheduling moment according to the active feasible domain of the photovoltaic unit at the next scheduling moment and the capacity of the photovoltaic inverter in the photovoltaic unit; determine the target power supply field according to the active feasible domain and reactive feasible domain of the thermal power unit at the next scheduling moment, the active feasible domain and reactive feasible domain of the wind turbine unit at the next scheduling moment, and the active feasible domain and reactive feasible domain of the photovoltaic unit at the next scheduling moment station in the power feasible domain of the target power station at the next scheduling moment; reporting the power feasible domain of the target power station at the next scheduling moment to the scheduling system of the target power station; receiving the scheduling power of the target power station from the scheduling system, so that the target power station dispatches the thermal power unit, the wind turbine unit and the photovoltaic unit to jointly output according to the scheduling power; wherein the scheduling power is obtained by the scheduling system based on the power feasible domain of multiple power stations including the target power station at the next scheduling moment through flow calculation.

[0129] In addition, the logic instructions in the above-mentioned memory 1430 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a disk or an optical disk.

[0130] On the other hand, the present invention also provides a computer program product, which includes a computer program, which can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the scheduling method for the wind-solar-thermal integrated industrial park power station provided by the above methods, and the method includes: for the scheduling duration, according to the output range and climbing ability of the thermal power unit of the target power station at the current moment, determining the active feasible domain of the thermal power unit at the next scheduling moment, and according to the electrical operation characteristic parameters of the thermal power unit, determining the reactive power feasible domain of the thermal power unit at the next scheduling moment; wherein the scheduling duration is the time difference between the next scheduling moment and the current moment, and the target power station is the power station of the wind-solar-thermal integrated industrial park; according to the maximum available wind power output and minimum utilization rate of the wind turbine unit of the target power station at the next scheduling moment, the active power feasible domain of the wind turbine unit at the next scheduling moment is determined, and according to the active power feasible domain of the wind turbine unit at the next scheduling moment, the electrical operating characteristic parameters of the wind turbine body and the capacity of the grid-side converter, the reactive power feasible domain of the wind turbine at the next scheduling moment is determined According to the maximum available output of the photovoltaic unit of the target power station at the next scheduling moment and the minimum utilization rate of photovoltaic power, determine the active feasible domain of the photovoltaic unit at the next scheduling moment, according to the active feasible domain of the photovoltaic unit at the next scheduling moment and the capacity of the photovoltaic inverter in the photovoltaic unit, determine the reactive feasible domain of the photovoltaic unit at the next scheduling moment; according to the active feasible domain and reactive feasible domain of the thermal power unit at the next scheduling moment, the active feasible domain and reactive feasible domain of the wind turbine unit at the next scheduling moment, and the active feasible domain of the photovoltaic unit at the next scheduling moment and reactive power feasible domain, determine the power feasible domain of the target power station at the next scheduling moment; report the power feasible domain of the target power station at the next scheduling moment to the scheduling system of the target power station; receive the scheduling power of the target power station from the scheduling system, so that the target power station can dispatch the thermal power unit, the wind turbine unit and the photovoltaic unit to jointly output according to the scheduling power; wherein the scheduling power is obtained by the scheduling system based on the power feasible domain of multiple power stations including the target power station at the next scheduling moment through flow calculation.

[0131] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to execute the scheduling method for the wind-solar-thermal integrated industrial park power station provided by the above-mentioned methods, the method comprising: for the scheduling duration, according to the output range and climbing ability of the thermal power unit of the target power station at the current moment, determining the active feasible domain of the thermal power unit at the next scheduling moment, and according to the electrical operating characteristic parameters of the thermal power unit, determining the reactive feasible domain of the thermal power unit at the next scheduling moment; wherein , the scheduling duration is the time difference between the next scheduling moment and the current moment, and the target power station is the power station of the wind, solar and thermal integrated industrial park; according to the maximum available wind power output and minimum utilization rate of the wind turbine unit of the target power station at the next scheduling moment, the active feasible domain of the wind turbine unit at the next scheduling moment is determined, and according to the active feasible domain of the wind turbine unit at the next scheduling moment, the electrical operating characteristic parameters of the wind turbine body and the capacity of the grid-side converter, the reactive feasible domain of the wind turbine at the next scheduling moment is determined; according to the solar power of the target power station The maximum available output of the photovoltaic unit at the next scheduling moment and the minimum utilization rate of photovoltaic power generation are used to determine the active feasible domain of the photovoltaic unit at the next scheduling moment; the reactive feasible domain of the photovoltaic unit at the next scheduling moment is determined according to the active feasible domain of the photovoltaic unit at the next scheduling moment and the capacity of the photovoltaic inverter in the photovoltaic unit; according to the active feasible domain and reactive feasible domain of the thermal power unit at the next scheduling moment, the active feasible domain and reactive feasible domain of the wind turbine unit at the next scheduling moment, and the active feasible domain and reactive feasible domain of the photovoltaic unit at the next scheduling moment, Determine the power feasible domain of the target power station at the next scheduling moment; report the power feasible domain of the target power station at the next scheduling moment to the scheduling system of the target power station; receive the scheduling power of the target power station from the scheduling system, so that the target power station can dispatch the thermal power unit, the wind turbine unit and the photovoltaic unit to jointly output according to the scheduling power; wherein the scheduling power is obtained by the scheduling system based on the power feasible domain of multiple power stations including the target power station at the next scheduling moment through flow calculation.

[0132] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0133] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0134] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dispatching method for a wind, solar and thermal integrated industrial park power station, characterized in that: include: With respect to the dispatching duration, the active feasible domain of the thermal power unit at the next dispatching moment is determined according to the output range and climbing capacity of the thermal power unit of the target power station at the current moment, and the reactive feasible domain of the thermal power unit at the next dispatching moment is determined according to the electrical operation characteristic parameters of the thermal power unit; wherein the dispatching duration is the time difference between the next dispatching moment and the current moment, and the target power station is the power station of the wind, solar and thermal integrated industrial park; Determine the active feasible domain of the wind turbine unit at the next scheduling moment according to the maximum available wind power output and the minimum utilization rate of the wind turbine unit of the target power source station at the next scheduling moment, and determine the reactive feasible domain of the wind turbine unit at the next scheduling moment according to the active feasible domain of the wind turbine unit at the next scheduling moment, the electrical operating characteristic parameters of the wind turbine body and the capacity of the grid-side converter; According to the maximum available output of the photovoltaic unit of the target power station at the next scheduling moment and the minimum photovoltaic utilization rate, the active feasible domain of the photovoltaic unit at the next scheduling moment is determined; according to the active feasible domain of the photovoltaic unit at the next scheduling moment and the capacity of the photovoltaic inverter in the photovoltaic unit, the reactive feasible domain of the photovoltaic unit at the next scheduling moment is determined; Determine the power feasible domain of the target power source station at the next scheduling moment according to the active feasible domain and reactive feasible domain of the thermal power unit at the next scheduling moment, the active feasible domain and reactive feasible domain of the wind turbine unit at the next scheduling moment, and the active feasible domain and reactive feasible domain of the photovoltaic unit at the next scheduling moment; Reporting the power feasible region of the target power station at the next scheduling moment to the scheduling system of the target power station; The dispatching power of the target power station is received from the dispatching system, so that the target power station dispatches the thermal power unit, the wind turbine unit and the photovoltaic unit to jointly output power according to the dispatching power; wherein the dispatching power is obtained by the dispatching system through power flow calculation based on the power feasible domain of multiple power stations including the target power station at the next dispatching moment.

2. The dispatching method for wind, solar and thermal integrated industrial park power supply station according to claim 1 is characterized in that: The scheduling duration is less than a first duration threshold; wherein the first duration threshold is the ratio of the difference between the minimum output of the thermal power unit in a conventional peak-shaving state and the minimum output in a deep peak-shaving state, and the second maximum climbing rate, and the second maximum climbing rate is the maximum climbing rate of the thermal power unit in a deep peak-shaving state; The method of determining the active feasible domain of the thermal power unit at the next scheduling time according to the output range and climbing capability of the thermal power unit of the target power station at the current time for the scheduling duration includes: When the output range of the thermal power generation unit at the current moment is within the first output range, determining the active power feasible region of the thermal power generation unit at the next scheduling moment as the first active power feasible region; Among them, the first output range takes the maximum output of the thermal power unit as the upper boundary, and takes the maximum output of the thermal power unit minus the product of the first maximum climbing rate and the scheduling time as the lower boundary, and the first maximum climbing rate is the maximum climbing rate of the thermal power unit under the conventional peak-shaving state; the first active feasible domain takes the output of the thermal power unit at the current moment minus the product of the first maximum climbing rate and the scheduling time as the lower boundary, and takes the output of the thermal power unit at the current moment plus the product of the first maximum climbing rate and the scheduling time as the upper boundary; When the output range of the thermal power generation group at the current moment is within the second output range, determining that the active power feasible region of the thermal power generation group at the next scheduling moment is the second active power feasible region; The second output range is defined as the maximum output of the thermal power unit minus the product of the first maximum climbing rate and the scheduling time as the upper boundary, and the minimum output of the thermal power unit under the conventional peak-shaving state minus the product of the second maximum climbing rate and the scheduling time as the lower boundary, and the second maximum climbing rate is the maximum climbing rate of the thermal power unit under the deep peak-shaving state; the second active feasible domain is the range formed by the output upper limit value and the output lower limit value that can be achieved after the scheduling time when the thermal power unit is in the second output range and is constrained by the first maximum climbing rate and the second maximum climbing rate; When the output range of the thermal power generation group at the current moment is within the third output range, determining that the active power feasible region of the thermal power generation group at the next scheduling moment is the third active power feasible region; The third output range has the minimum output of the thermal power unit under the conventional peak-shaving state as the upper boundary, and the minimum output of the thermal power unit under the conventional peak-shaving state minus the product of the second maximum climbing rate and the scheduling time as the lower boundary; the third active feasible domain has the output of the thermal power unit at the current moment minus the product of the second maximum climbing rate and the scheduling time as the lower boundary, and the output of the thermal power unit at the current moment plus the product of the second maximum climbing rate and the scheduling time as the upper boundary; The output of the thermal power unit at the current moment satisfies the output constraint range; the output constraint range takes the maximum output of the thermal power unit as the upper boundary and the minimum value of the thermal power unit in the deep peak regulation state as the lower boundary.

3. The dispatching method for wind, solar and thermal integrated industrial park power supply station according to claim 2 is characterized in that: The scheduling duration is greater than the first duration threshold and less than the second duration threshold; wherein the second duration threshold is the difference between the maximum output of the thermal power unit and the minimum output under the conventional peak load state divided by the first maximum ramp rate; The method of determining the active feasible domain of the thermal power unit at the next scheduling time according to the output range and climbing capability of the thermal power unit of the target power station at the current time for the scheduling duration includes: When the output range of the thermal power generation group at the current moment is within the first output range, determining that the active power feasible region of the thermal power generation group at the next scheduling moment is the first active power feasible region; When the output range of the thermal power group at the current moment is within the second output range, the active power feasible domain of the thermal power group at the next scheduling moment is determined to be the second active power feasible domain.

4. The dispatching method for wind, solar and thermal integrated industrial park power supply station according to claim 1 is characterized in that: The scheduling duration is greater than the second duration threshold and less than the third duration threshold, and the third duration threshold is expressed using the following formula: ； in, is the scheduling duration; is the maximum output of the thermal power unit; is the first maximum climbing rate; is the second maximum climbing rate; is the minimum output of the thermal power unit under deep peak regulation; is the minimum output of the thermal power unit under conventional peak load regulation; The method of determining the active feasible domain of the thermal power unit at the next scheduling time according to the output range and climbing capability of the thermal power unit of the target power station at the current time for the scheduling duration includes: When the output range of the thermal power group at the current moment is within the second output range, the active power feasible domain of the thermal power group at the next scheduling moment is determined to be the second active power feasible domain.

5. The dispatching method for wind, solar and thermal integrated industrial park power supply station according to claim 1 is characterized in that: The scheduling duration is greater than the third duration threshold; The method of determining the active feasible domain of the thermal power unit at the next scheduling time according to the output range and climbing capability of the thermal power unit of the target power station at the current time for the scheduling duration includes: The active power feasible domain of the thermal power unit at the next scheduling moment takes the maximum output of the thermal power unit as the upper boundary and takes the minimum value of the thermal power unit in the deep peak regulation state as the lower boundary.

6. The dispatching method for wind, solar and thermal integrated industrial park power supply station according to claim 1 is characterized in that: The step of determining the reactive power feasible region of the thermal power unit at the next scheduling moment according to the electrical operation characteristic parameters of the thermal power unit comprises: According to the maximum value of the stator current and the terminal voltage of the thermal power unit, a stator heating operation limit constraint of the thermal power unit is established to obtain a first powerless capacity boundary of the thermal power unit when the thermal power unit is in delayed phase operation; According to the terminal voltage of the thermal power unit, the synchronous reactance of the generator and the external equivalent reactance, a second reactive capacity boundary of the thermal power unit in the phase leading operation is obtained; The reactive power feasible region of the thermal power unit at the next scheduling moment is determined according to the first reactive power boundary and the second reactive power boundary.

7. The dispatching method for wind, solar and thermal integrated industrial park power supply station according to claim 1 is characterized in that: The step of determining the reactive feasible domain of the wind turbine at the next scheduling moment according to the active feasible domain of the wind turbine unit at the next scheduling moment, the electrical operation characteristic parameters of the wind turbine body and the capacity of the grid-side converter comprises: Determining the reactive power feasible region of the wind turbine body according to the characteristic parameters of the stator and the rotor current constraints of the wind turbine unit; Determining reactive power support provided by the wind turbine grid-side converter according to the capacity of the grid-side converter, the wind power slip rate, and the predicted wind power output of the wind turbine unit at the next scheduling moment; Based on the reactive feasible region of the wind turbine body and the reactive support provided by the grid-side converter of the wind turbine, the reactive feasible region of the wind turbine at the next scheduling moment is determined.

8. A dispatching device for a wind, solar and thermal integrated industrial park power station, characterized in that: include: The first determination module is used to determine the active feasible domain of the thermal power unit at the next scheduling time according to the output range and climbing ability of the thermal power unit of the target power station at the current time, and determine the reactive feasible domain of the thermal power unit at the next scheduling time according to the electrical operation characteristic parameters of the thermal power unit; wherein the scheduling time is the time difference between the next scheduling time and the current time, and the target power station is the power station of the wind, solar and thermal integrated industrial park; The second determination module is used to determine the active feasible domain of the wind turbine unit at the next scheduling moment according to the maximum available wind power output and the minimum utilization rate of the wind turbine unit of the target power source station at the next scheduling moment, and determine the reactive feasible domain of the wind turbine at the next scheduling moment according to the active feasible domain of the wind turbine unit at the next scheduling moment, the electrical operation characteristic parameters of the wind turbine body and the capacity of the grid-side converter; The third determination module is used to determine the active feasible domain of the photovoltaic group at the next scheduling moment according to the maximum available output of the photovoltaic group of the target power source station at the next scheduling moment and the minimum photovoltaic utilization rate, and determine the reactive feasible domain of the photovoltaic group at the next scheduling moment according to the active feasible domain of the photovoltaic group at the next scheduling moment and the capacity of the photovoltaic inverter in the photovoltaic group; The fourth determination module is used to determine the power feasible domain of the target power source station at the next scheduling moment according to the active feasible domain and reactive feasible domain of the thermal power unit at the next scheduling moment, the active feasible domain and reactive feasible domain of the wind turbine unit at the next scheduling moment, and the active feasible domain and reactive feasible domain of the photovoltaic unit at the next scheduling moment; A reporting module, used for reporting the power feasible domain of the target power station at the next scheduling moment to the scheduling system of the target power station; A scheduling module is used to receive the scheduling power of the target power station from the scheduling system, so that the target power station can schedule the thermal power unit, the wind turbine unit and the photovoltaic unit to jointly output power according to the scheduling power; wherein the scheduling power is obtained by the scheduling system based on the power feasible domain of multiple power stations including the target power station at the next scheduling moment through flow calculation.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, it implements the scheduling method for the wind, solar and thermal integrated industrial park power supply station as described in any one of claims 1 to 7.

10. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by the processor, it implements the scheduling method of the wind, solar and thermal integrated industrial park power supply station as described in any one of claims 1 to 7.

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