CN111724056B - Direct current planning method and system for preferentially absorbing clean energy - Google Patents
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Abstract
The invention discloses a direct current planning method and a system for preferentially absorbing clean energy, which comprise the following steps: 1) Collecting data; 2) A power generation schedule is compiled, wherein the matched thermal power generating unit outputs P with the lowest technology Bmin Generating electricity; the matched new energy generates power P by using new energy C Generating electricity; medium-long term transaction amount P D Generating electricity; 3) Calculating the residual conveying capacity P of a direct current power supply line A A1 The method comprises the steps of carrying out a first treatment on the surface of the 4) Continuously planning a power generation schedule, and importing spot transaction amount P of electric power market E The method comprises the steps of carrying out a first treatment on the surface of the Calculating the remaining conveying capacity P A2 The method comprises the steps of carrying out a first treatment on the surface of the 5) If P A2 Modifying the output of the thermal power unit matched with the power generation schedule compiled in the step 4) and outputting the output; if P A2 And (3) outputting the power generation schedule compiled in the step 4) when the power generation schedule is smaller than or equal to 0. The invention realizes the aim of eliminating new energy to the maximum extent; and the method can be executed by a computer, so that the efficiency of generating a power plan is improved.
Description
Technical Field
The invention belongs to the field of power system automation, and particularly relates to a direct current planning method and system for preferentially absorbing clean energy.
Background
The development of clean energy is an important force for energy transformation, and along with the expansion of the scale of the clean energy industry and the progress of technical equipment, the development of the clean energy industry effectively relieves the pressure facing energy resources and ecological environment. However, the contradiction that the clean energy is not balanced sufficiently is increasingly highlighted, and especially the clean energy consumption has become a key problem for restricting the healthy and sustainable development of the power industry.
The prior reservation of the power generation space of clean energy sets such as hydropower, wind power, photovoltaic power generation and the like has become a power development trend; the clean energy power generation is encouraged to participate in the market, and the electric quantity determined by the market mode such as direct trade and the like can be deducted from the power generation plan. The power supply and demand and the power transmission channel capacity of each power supply and receiving party are comprehensively planned across the provincial area, the annual power supply and receiving plan is fully and autonomously negotiated and determined, the clean energy supply and consumption are increased as much as possible, and the water, wind and light abandoning is avoided.
The traditional power generation plan is mainly prepared by adopting a manual input mode, so that the preparation efficiency is low, mistakes are easy to occur, and the aim of clean energy consumption is difficult to achieve. In order to implement the guidelines of 'clean low carbon, safe and efficient', the national requirements on new energy consumption are met, the power generation planning efficiency is improved, and a high-efficiency and feasible power generation planning method needs to be formulated.
Disclosure of Invention
The invention aims to provide a direct current planning method and system for preferentially absorbing clean energy, which can promote the absorption of new energy to the maximum extent and improve the planning efficiency of a power generation plan.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a direct current planning method for preferentially absorbing clean energy comprises the following steps:
1) Collecting the conveying capacity P of a direct current power supply line A A The method comprises the steps of carrying out a first treatment on the surface of the Collecting the total minimum technical output P of a thermal power unit matched with a direct-current power supply line A Bmin The method comprises the steps of carrying out a first treatment on the surface of the Collecting total new energy generating capacity P of new energy matched with direct current power supply line A C The method comprises the steps of carrying out a first treatment on the surface of the Collecting medium-long term transaction amount P on direct current power supply line A D ；
2) A power generation schedule is compiled, wherein the matched thermal power generating unit outputs P with the lowest technology Bmin Generating electricity; the matched new energy generates power P by using new energy C Generating electricity; medium-long term transaction amount P D Generating electricity;
3) Calculating the residual conveying capacity P of the direct current power supply line A after the thermal power generating unit, new energy and medium-long term transaction are consumed A1 ：
P A1 ＝P A -P Bmin -P D -P C (1)
4) Continuously planning a power generation schedule, and importing spot transaction amount P of electric power market E The method comprises the steps of carrying out a first treatment on the surface of the Calculating the amount P of the spot transaction E Residual conveying capacity P of rear direct current power supply circuit A A2 ：
P A2 ＝P A1 -P E (2)
5) Judging P A2 Whether greater than 0; if P A2 More than 0, modifying the output of the thermal power generating unit matched with the power generation schedule compiled in the step 4) to enable P to be the same as A2 =0, forming a final power generation schedule of the direct current power supply line a and outputting the power generation schedule; if P A2 And (3) outputting the power generation schedule compiled in the step 4) when the power generation schedule is smaller than or equal to 0.
Further, in step 5), if P A2 Greater than 0, the remaining space P A2 The power generation schedule compiled in the step 4) is modified by equal proportion distribution according to rated power generation capacity of each matched thermal power generating unitAnd (3) the thermal power unit output forms a final direct current A power generation schedule table and outputs the final direct current A power generation schedule table.
Further, the direct current planning method for preferentially consuming clean energy meets the power balance constraint:
wherein N is G Representing the total number of units; i and t represent a generator set element and a period element, respectively; g i,t Representing the output level of the generator set i in the t period; l (L) t Indicating that the direct current a outputs the power target value in the period t.
Furthermore, the direct current planning method for preferentially absorbing clean energy meets the unit output constraint:
G i,min <G i,t <G i,max (4)
wherein G is i,min And G i,max The minimum technical output and the maximum technical output of the generator set i are respectively represented.
Furthermore, the direct current planning method for preferentially absorbing clean energy meets the constraint of the climbing rate of the unit:
in RU i And RD (RD) i Respectively representing the maximum climbing rate and the maximum downslope rate of the generator set; i represents a generator element set; t represents a set of epoch elements.
Further, the direct current planning method for preferentially consuming clean energy meets the constraint of cluster output:
wherein I is j A j-th constrained cluster; g Ij,min And G Ij,max The minimum and maximum generated power limits of the group j are indicated, respectively.
Further, the direct current planning method for preferentially absorbing clean energy meets the constraint of fixed output:
G i,t ＝GF i,t (8)
in GF (GF) i,t Representing the fixed planned output of the generator set i during period t.
A direct current planning system for preferentially consuming clean energy, the system comprising: the system comprises a processor and a memory coupled to the processor, wherein the memory stores a computer program which, when executed by the processor, implements the method steps of the direct current planning method for preferentially consuming clean energy.
Compared with the prior art, the invention has the following beneficial effects:
the invention relates to a direct current planning method for preferentially absorbing clean energy, which is applied to the planning of a power generation plan; during programming, the matched thermal power generating unit outputs force P with the lowest technology Bmin Generating electricity; the aim of eliminating new energy to the maximum is fulfilled; the invention can be executed by a computer, and improves the efficiency of generating a power plan.
Detailed Description
The following detailed description is exemplary and is intended to provide further details of the invention. Unless defined otherwise, all technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention.
In the power generation planning process, certain direct current transaction components are more, the transaction components are mutually coupled, and the planning and planning process is quite complex. Taking direct current A as an example, four transaction components need to be considered in the planning of direct current A: the first type is a direct current A matched with a thermal power B, the second type is a direct current A matched with a new energy C, the third type is a medium-long term transaction D, and the fourth type is a spot transaction E.
The invention provides a direct current plan making method for preferentially absorbing clean energy, which promotes the absorption of new energy to the maximum extent and improves the making efficiency of a power generation plan, and specifically comprises the following steps:
1) Collecting the conveying capacity P of a direct current power supply line A A The method comprises the steps of carrying out a first treatment on the surface of the Collecting the total minimum technical output P of a thermal power unit matched with a direct-current power supply line A Bmin The method comprises the steps of carrying out a first treatment on the surface of the Collecting total new energy generating capacity P of new energy matched with direct current power supply line A C The method comprises the steps of carrying out a first treatment on the surface of the Collecting medium-long term transaction amount P on direct current power supply line A D ；
2) A power generation schedule is compiled, wherein the matched thermal power generating unit outputs P with the lowest technology Bmin Generating electricity; the matched new energy generates power P by using new energy C Generating electricity; medium-long term transaction amount P D Generating electricity;
3) Calculating the residual conveying capacity P of the direct current power supply line A after the thermal power generating unit, new energy and medium-long term transaction are consumed A1 ：
P A1 ＝P A -P Bmin -P D -P C (1)
4) Continuously planning a power generation schedule, and importing spot transaction amount P of electric power market E The method comprises the steps of carrying out a first treatment on the surface of the Calculating the amount P of the spot transaction E Residual conveying capacity P of rear direct current power supply circuit A A2 ：
P A2 ＝P A1 -P E (2)
5) Judging P A2 Whether greater than 0; if P A2 More than 0, modifying the output of the thermal power generating unit matched with the power generation schedule compiled in the step 4) to enable P to be the same as A2 =0, forming a final power generation schedule of the direct current power supply line a and outputting the power generation schedule; if P A2 And (3) outputting the power generation schedule compiled in the step 4) when the power generation schedule is smaller than or equal to 0.
The direct current planning method for preferentially absorbing clean energy provided by the invention meets the following constraints:
(1) Power balance constraint:
wherein N is G Representing the total number of units; i and t represent a generator set element and a period element, respectively; g i,t Representing the output level of the generator set i in the t period; l (L) t Indicating that the direct current a outputs the power target value in the period t.
(2) Unit output constraint
G i,min <G i,t <G i,max (4)
Wherein G is i,min And G i,max The minimum technical output and the maximum technical output of the generator set i are respectively represented.
(3) Constraint of climbing rate of unit
The climbing constraint of the generator set refers to that the output change value of the generator set in two adjacent time periods is within the allowable range of climbing up and down, and the specific formula is as follows:
in RU i And RD (RD) i Respectively representing the maximum ramp up rate and the maximum ramp down rate of the generator set. I represents a generator element set; t represents a set of epoch elements.
(4) Group output constraint
Wherein I is j A j-th constrained cluster; g Ij,min And G Ij,max The minimum and maximum generated power limits of the group j are indicated, respectively.
(5) Fixed force constraint
G i,t ＝GF i,t (8)
In GF (GF) i,t Representing the fixed planned output of the generator set i during period t.
The invention also provides a direct current planning system for preferentially absorbing clean energy, which comprises: a processor and a memory coupled to the processor, the memory storing a computer program which, when executed by the processor, performs the method steps of a direct current planning method for preferentially dissipating clean energy.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Finally, it should be noted that: the above embodiments are only for illustrating the technical aspects of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those of ordinary skill in the art that: modifications and equivalents may be made to the specific embodiments of the invention without departing from the spirit and scope of the invention, which is intended to be covered by the claims.
Claims (8)
1. A direct current planning method for preferentially absorbing clean energy is characterized by comprising the following steps:
1) Collecting the conveying capacity P of a direct current power supply line A A The method comprises the steps of carrying out a first treatment on the surface of the Collecting the total lowest technical output P of a thermal power unit matched with a direct-current power supply line A Bmin The method comprises the steps of carrying out a first treatment on the surface of the Collecting total new energy generating capacity P of new energy matched with direct current power supply line A C The method comprises the steps of carrying out a first treatment on the surface of the Collecting medium-long term transaction amount P on direct current power supply line A D ；
2) A power generation schedule is compiled, wherein the matched thermal power generating unit outputs P with the lowest technology Bmin Generating electricity; the matched new energy generates power P by using new energy C Generating electricity; medium-long term transaction amount P D Generating electricity;
3) Calculating the residual conveying capacity P of the direct current power supply line A after the thermal power generating unit, new energy and medium-long term transaction are consumed A1 ：
P A1 ＝P A -P Bmin -P D -P C (1)
4) Continuously planning a power generation schedule, and importing spot transaction amount P of electric power market E The method comprises the steps of carrying out a first treatment on the surface of the Calculating the amount P of the spot transaction E Residual conveying capacity P of rear direct current power supply circuit A A2 ：
P A2 ＝P A1 -P E (2)
5) Judging P A2 Whether greater than 0; if P A2 More than 0, modifying the output of the thermal power generating unit matched with the power generation schedule compiled in the step 4) to enable P to be the same as A2 =0, forming a final power generation schedule of the direct current power supply line a and outputting the power generation schedule; if P A2 And (3) outputting the power generation schedule compiled in the step 4) when the power generation schedule is smaller than or equal to 0.
2. The method for direct current planning for preferential absorption of clean energy according to claim 1, wherein in step 5), if P A2 Greater than 0, the remaining space P A2 And (3) carrying out equal proportion distribution according to rated power generation capacity of each matched thermal power generating unit, and modifying the output of the thermal power generating unit matched in the power generation schedule compiled in the step (4) to form a final direct current (A) power generation schedule and outputting the final direct current A power generation schedule.
3. The method for planning a direct current for preferentially consuming clean energy according to claim 1, wherein the method for planning a direct current for preferentially consuming clean energy satisfies a power balance constraint:
wherein N is G Representing the total number of units; i and t represent a generator set element and a period element, respectively; g i,t Representing the output level of the generator set i in the t period; l (L) t Indicating that the direct current a outputs the power target value in the period t.
4. The method for planning a direct current for preferentially consuming clean energy according to claim 3, wherein the method for planning a direct current for preferentially consuming clean energy satisfies the unit output constraint:
G i,min <G i,t <G i,max (4)
wherein G is i,min And G i,max The minimum technical output and the maximum technical output of the generator set i are respectively represented.
5. The direct current planning method for preferentially absorbing clean energy according to claim 3, wherein the direct current planning method for preferentially absorbing clean energy meets the unit climbing rate constraint:
in RU i And RD (RD) i Respectively representing the maximum climbing rate and the maximum downslope rate of the generator set; i represents a generator element set; t represents a set of epoch elements.
6. The method for planning a direct current for preferentially consuming clean energy according to claim 3, wherein the method for planning a direct current for preferentially consuming clean energy satisfies a cluster output constraint:
wherein I is j A j-th constrained cluster; g Ij,min And G Ij,max The minimum and maximum generated power limits of the group j are indicated, respectively.
7. The method for planning a direct current for preferentially consuming clean energy according to claim 3, wherein the method for planning a direct current for preferentially consuming clean energy satisfies a fixed output constraint:
G i,t ＝GF i,t (8)
in GF (GF) i,t Representing the fixed planned output of the generator set i during period t.
8. A direct current planning system for preferential clean energy consumption, said system comprising: a processor and a memory coupled to the processor, the memory storing a computer program which, when executed by the processor, implements the method steps of a direct current planning method for preferentially dissipating clean energy according to any one of claims 1-7.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578176A (en) * | 2014-12-11 | 2015-04-29 | 国电南瑞科技股份有限公司 | Method for making power generation plan in consideration of direct current interaction |
| CN106203736A (en) * | 2016-07-28 | 2016-12-07 | 华北电力大学 | A kind of formulating method of large-scale Energy Base wind-fire isolated island direct current transportation plan |
| CN108347048A (en) * | 2017-01-22 | 2018-07-31 | 中国电力科学研究院 | A kind of planning device adapting to transregional transnational scheduling method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578176A (en) * | 2014-12-11 | 2015-04-29 | 国电南瑞科技股份有限公司 | Method for making power generation plan in consideration of direct current interaction |
| CN106203736A (en) * | 2016-07-28 | 2016-12-07 | 华北电力大学 | A kind of formulating method of large-scale Energy Base wind-fire isolated island direct current transportation plan |
| CN108347048A (en) * | 2017-01-22 | 2018-07-31 | 中国电力科学研究院 | A kind of planning device adapting to transregional transnational scheduling method |
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