CN110929959B - Method and device for allocating local deep peak regulation expense of power grid - Google Patents
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Abstract
The invention discloses a local deep peak shaving expense allocation method for a power grid, which comprises the following steps: comprising the following steps: the power dispatching control center calculates load prediction and negative standby; judging whether to start local depth peak shaving; if the local depth peak regulation is started, sequentially calling the thermal power unit; calculating local depth peak regulation cost to obtain compensation cost; and (5) carrying out cost allocation according to the calling condition of the thermal power generating unit. The invention provides a local peak regulation cost compensation device for a power grid, which is used for carrying out full-network deep peak regulation and local deep peak regulation identification on a deep peak regulation transaction area, adopting local deep peak regulation to compensate the power grid, and carrying out cost allocation according to an allocation method for obtaining compensation cost by local deep peak regulation, so that the market benefit of the power grid is allocated and balanced, and the market excitation effect is exerted.
Description
Technical Field
The invention relates to the technical field of electric power markets, in particular to a local deep peak shaving expense allocation method and device for a power grid.
Background
The peak regulation of the power grid refers to the process of arranging a conventional generator set to run in a power interval lower than a paid peak regulation reference and even arranging the conventional generator set to stop in order to meet the requirement of power balance in a load low valley period or a power generation peak period of a renewable energy unit. Along with the large-scale grid connection of renewable energy sources in recent years, the permeability of photovoltaic and wind turbine generators in the range of most power grids is continuously improved, so that the peak shaving demands of the power grids are continuously increased. In the foreseeable future, the installed capacity of renewable energy sources will still increase rapidly, and the duty ratio of the installed power source structure of the heating unit with limited peak shaving potential is continuously improved, so that the peak shaving capacity, especially the low peak shaving capacity, of conventional units such as thermal power units are severely restricted. Therefore, the inadaptation of the power peak regulation auxiliary service requirement and the energy structure optimization direction becomes a prominent problem of safe and stable operation of the power grid and new energy consumption in a long time in the future, the potential of carrying out effective management and control on each scheduling resource and optimizing configuration of deep excavation resources is needed to be matched with the design of an incentive compatible mechanism to deeply excavate the peak regulation potential of the system.
At present, electric power peak shaving auxiliary service transaction is carried out in a partial area range, conventional units with peak shaving capacity are organized to offer according to actual requirements of power grid operation, peak shaving cost under the condition of meeting power grid safety constraint is minimized as a target, a peak shaving plan of the power grid is obtained by optimizing decision, and peak shaving auxiliary service cost is shared by related units in a full-province range according to a peak shaving market rule. Under the normal operation condition that no power grid blockage occurs, the power grid peak shaving demand is mainly determined by the power load demand, the renewable energy power generation output and the operation mode of a conventional unit in the whole area range, and the arrangement of the peak shaving auxiliary service and the cost allocation mode can optimize the resource configuration by means of a price mechanism.
In the power grid configuration process in the prior art, when a unit in a part of areas must operate in a deep peak shaving power interval due to power grid blockage in the part of areas, and peak shaving resources with better quality and lower price of the unit outside the blocked areas are not called, according to the current dispatching operation and market operation rules, only the deep peak shaving settlement price processing mode called by network constraint is considered, the local peak shaving compensation cost allocation is not further considered, and the whole-network allocation is still executed. Local regional grid blockage creates local peak shaving costs that are shared by the whole-grid market bodies, causing imbalance in the market body's distribution of benefits. The peak regulation capability of part of power plants is strong, the peak regulation compensation income is very low, but unnecessary allocation is carried out, and the excitation effect of the market is not fully exerted.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a local deep peak shaving expense allocation method and device for a power grid.
The invention adopts the technical scheme that:
A local deep peak regulation expense allocation method for a power grid comprises the following steps:
the power dispatching control center calculates load prediction and negative standby;
judging whether to start local depth peak shaving;
if the local depth peak regulation is started, sequentially calling the thermal power unit;
calculating local depth peak regulation cost to obtain compensation cost;
And (5) carrying out cost allocation according to the calling condition of the thermal power generating unit.
The invention has the following further technical scheme: the power dispatching control center calculates load prediction and negative standby, and specifically comprises the following steps: and the power dispatching center carries out load prediction and negative standby calculation according to the peak shaving auxiliary service system, and judges whether to start local deep peak shaving.
The invention has the following further technical scheme: the judging whether to start local depth peak shaving specifically comprises the following steps:
When the full-grid negative standby is sufficient, but is influenced by the blocking of the section of the power grid, the thermal power generating unit in the blocking area operates by reducing the output of the thermal power generating unit to be below the paid peak regulation reference value according to the power balance requirement, the thermal power generating unit outside the blocking area is not called, and the depth peak regulation at the moment is local depth peak regulation.
Further, when the full-network negative standby is sufficient, the method specifically includes: full-network negative standby is sufficient and full-network negative standby is insufficient, but after full-network peak shaving, a full-network does not have a negative standby gap.
The invention has the following further technical scheme: if the local depth peak regulation is started, sequentially calling the thermal power unit; the method specifically comprises the following steps: when the full-network negative standby is sufficient, local depth peak shaving is started, and the sensitivity of the installation section of the thermal power generating unit in the blocking area is sequentially invoked from high to low.
The invention has the following further technical scheme: calculating the local depth peak shaving cost to obtain compensation cost; the method comprises the following steps: the local depth peak regulation compensation cost is the sum of the compensation cost of the called thermal power generating unit; the compensation cost of the thermal power generating unit is the product of the local deep peak shaving electric quantity and the deep peak shaving settlement price of the thermal power generating unit in a unit statistical period.
The invention has the following further technical scheme: the method for allocating the cost according to the calling condition of the thermal power generating unit specifically comprises the following steps: and in the unit statistical period, dividing the electric quantity of the called thermal power generating unit by the on-line electric quantity of a market main body in the blocking area of the power grid, and multiplying the electric quantity by the local depth peak regulation compensation cost in the blocking area.
The invention provides a local peak shaving expense compensation device for a power grid, which comprises the following components:
The power grid negative standby module is used for calculating load prediction and negative standby by the power dispatching control center;
the judging module is used for judging whether to start local depth peak shaving;
The thermal power generating unit calling module is used for calling the thermal power generating unit in sequence if the local depth peak regulation is started;
The compensation cost calculation module is used for calculating the local depth peak regulation cost to obtain compensation cost;
And the apportionment expense calculation module is used for apportioning expenses according to the calling condition of the thermal power generating unit.
The beneficial effects of the invention are as follows:
The invention carries out full-network deep peak shaving and local deep peak shaving identification on the deep peak shaving transaction area, compensates the power grid by adopting the local deep peak shaving, and distributes the cost according to the distribution method of the compensation cost obtained by the local deep peak shaving, so that the market benefit distribution of the power grid is balanced, and the market excitation effect is exerted.
Drawings
FIG. 1 is a flow chart of a method for allocating local deep peak shaving expense of a power grid;
Fig. 2 is a block diagram of a local deep peak shaving expense allocation device for a power grid.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The invention provides a local deep peak shaving cost allocation method for a power grid, which is characterized in that deep peak shaving transaction areas are divided into a full-network deep peak shaving identification method, a local deep peak shaving identification method and a local deep peak shaving compensation cost allocation method, namely, when the local deep peak shaving is started, the cost generated by the local deep peak shaving is shared by market main bodies in a blocking area.
The foregoing is the core concept of the present application and the following detailed description of the application is provided in connection with the accompanying drawings so that those skilled in the art may better understand the present application. It should be understood that the embodiments of the present application and the specific features in the embodiments are detailed descriptions of the technical solutions of the present application, and not limited to the technical solutions of the present application, and the embodiments of the present application and the technical features in the embodiments may be combined with each other without conflict.
As shown in FIG. 1, a flow chart of a method for allocating local deep peak shaving expense of a power grid is provided.
Referring to fig. 1, the method for allocating local deep peak shaving expense of the power grid provided by the invention specifically comprises the following steps:
Step 101, a power dispatching control center calculates load prediction and negative standby, and judges whether to start local deep peak shaving;
102, if local depth peak shaving is started, sequentially calling the thermal power unit;
Step 103, calculating local depth peak shaving cost to obtain compensation cost;
and 104, carrying out cost allocation according to the calling condition of the thermal power generating unit.
The power dispatching control center calculates load prediction and negative standby, and specifically comprises the following steps: and the power dispatching center carries out load prediction and negative standby calculation according to the peak shaving auxiliary service system, and judges whether to start local deep peak shaving.
In the embodiment of the invention, the definition of local depth peak shaving is as follows: the whole network negative reserve is sufficient, or the original whole network negative reserve is insufficient, after the whole network peak regulation, the whole network is not provided with a negative reserve gap, but is influenced by the blocking of the section of the power grid, the thermal power unit in the blocking area operates by reducing the output of the thermal power unit to be lower than the compensated peak regulation reference value according to the electric power balance requirement, and the thermal power unit outside the blocking area has higher quality and lower price peak regulation resources which are not called, and the depth peak regulation at the moment is local depth peak regulation.
In the embodiment of the invention, a power dispatching control center predicts the load of the previous day or the current day, calculates the negative reserve of the whole network according to the load prediction, judges whether the negative reserve of the whole network is sufficient, when the negative reserve of the whole network is sufficient and a blocking area occurs, starts local deep peak shaving, calls thermal power units outside the blocking area to the blocking area for use, calculates the total cost according to the total electric quantity of the called thermal power units and the current electric energy cost, and then distributes the cost according to the electric quantity occupation ratio of each thermal power unit.
In step 102, if local depth peak shaving is started, sequentially calling the thermal power generating unit; the method specifically comprises the following steps: when the full-network negative standby is sufficient, local depth peak shaving is started, and the sensitivity of the installation section of the thermal power generating unit in the blocking area is sequentially invoked from high to low.
In the embodiment of the invention, the sensitivity of the thermal power generating unit to the blocked section is the generator output power transfer distribution factor, and the variation of section tide caused by the variation of the generator active output power is defined. If the active power of the node i where the generator is located changes by delta P i, the active power of the section s is changed toThen there is
Meanwhile, the section needs to meet the power flow constraint, and the section power flow constraint can be described as:
Wherein, The power flow transmission limits of the sections s are respectively; n represents the total number of units, G s-i is the generator output power transfer distribution factor of the node pair section s where the unit i is located, and P i,t represents the output of the unit i in the t period; k is the number of nodes of the system, G s-k is the generator output power transfer distribution factor of the node K to the section s, and D k,t is the bus load value of the node K in the period t. /(I)The forward and reverse power flow relaxation variables of the section s are respectively.
The sensitivity of the local depth peak shaver set is high, namely the G s-i、Gs-k value is larger, and when the depth peak shaver of the generator set is used, the variation of the section tide is larger, so that the section tide constraint is more easily met. Therefore, when the local peak shaver set is called, the sensitivity of the set in the blocking area to the section is ordered from large to small according to the shortage of the power adjustment of the blocking section on the premise of meeting the minimum technical output requirement of the set, and the output of the set with larger sensitivity is preferentially regulated and reduced to meet the requirement of power balance in the blocking area.
In step 103, calculating local depth peak shaving cost to obtain compensation cost; the method comprises the following steps: the local depth peak regulation compensation cost is the sum of the compensation cost of the called thermal power generating unit; the compensation cost of the thermal power generating unit is the product of the local deep peak shaving electric quantity and the deep peak shaving settlement price of the thermal power generating unit in a unit statistical period.
The local depth peak shaver cost compensation is calculated as follows:
in the unit statistical period, the calculation formula of the local depth peak regulation compensation cost of the coal-fired thermal power unit is as follows:
Fi, Local depth peak shaving compensation ＝Qi, Local depth peak shaving ·Pi, Local depth peak shaving ；
in the formula, fi and local depth peak regulation compensation are used as the local depth peak regulation compensation cost of the coal-fired power unit i in a unit statistical period; qi, local depth peak regulation is the local depth peak regulation electric quantity of the coal-fired power generation unit i in a unit statistical period; pi, local deep peak shaving is the i deep peak shaving settlement price of the coal-fired generator set, and is in principle the average price of the deep peak shaving of the whole network of each generator set in the last day.
In the unit statistical period, the calculation formula of the local depth peak regulation compensation cost of the coal-fired thermal power enterprise is as follows:
In the formula, fj, local depth peak regulation compensation is the local depth peak regulation compensation cost of a coal-fired and thermal power enterprise j in a unit statistical period; fi, local depth peak shaving compensation is the cost of local depth peak shaving compensation of the coal-fired thermal power unit i in a unit statistical period; and n is the number of local deep peak shaver sets participated in by the coal-fired thermal power enterprise j.
In the unit statistical period, the calculation formula of the local depth peak shaving compensation cost is as follows:
In the formula, the local depth peak shaving compensation of the F blocking area is the local depth peak shaving compensation cost of the power grid blocking area in a unit statistical period; fj, local depth peak regulation compensation is the cost of local depth peak regulation compensation of a coal-fired thermal power enterprise j in a unit statistical period; and n is the number of families participating in local deep peak regulation of the coal-fired and thermal power enterprises.
In step 104, the method for allocating the cost according to the calling condition of the thermal power generating unit specifically includes: and in the unit statistical period, dividing the electric quantity of the called thermal power generating unit by the on-line electric quantity of a market main body in the blocking area of the power grid, and multiplying the electric quantity by the local depth peak regulation compensation cost in the blocking area.
In the unit statistical period, the calculation formula of the local depth peak regulation compensation expense allocation is as follows:
In the formula, R j, Local depth peak shaving and splitting is the local deep peak regulation and cost allocation of a main body j of a market in a power grid blocking area in a unit statistical period; w j, Internet surfing is the online electric quantity of a market main body j in a power grid blocking area in a unit statistical period, wherein: the market main body has incomplete real-time power generation information acquisition, the output calculates the power on the internet according to the 85% load rate, the hydroelectric generating set which cannot participate in deep peak regulation due to the requirements of flood prevention, irrigation and the like does not participate in the allocation of the deep peak regulation cost, and the power dispatching control center should record and check the reasons in detail; and F Local depth peaking compensation for blocked areas is the local depth peak shaving compensation cost in the power grid blocking area in the unit statistical period.
Referring to fig. 2, the present invention further provides a local peak shaving expense compensation device for a power grid, including:
The power grid judging module 201 is used for calculating load prediction and negative reserve by the power dispatching control center and judging whether to start local deep peak shaving;
The thermal power generating unit calling module 202 is used for calling the thermal power generating unit in sequence if local depth peak shaving is started;
The compensation cost calculation module 203 is configured to calculate a local depth peak-shaving cost to obtain a compensation cost;
And the apportionment expense calculation module 204 is used for apportioning expense according to the calling condition of the thermal power generating unit.
The various modifications and embodiments of the method for allocating local deep peak shaver charges in a power grid in the first embodiment are equally applicable to the device for allocating local deep peak shaver charges in a power grid in the present embodiment, and by the foregoing detailed description of the method for allocating local deep peak shaver charges in a power grid, those skilled in the art can clearly know that the device for allocating local deep peak shaver charges in a power grid in the present embodiment is based, so that details thereof will not be described herein for brevity of the specification.
The above examples are typical examples of the present invention, but the embodiments of the present invention are not limited to the above examples. Any other changes, modifications, substitutions, combinations, simplifications, etc. which do not depart from the spirit and principles of the invention are intended to be equivalent arrangements which are within the scope of the invention.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and a person skilled in the art may still make modifications and equivalents to the specific embodiments of the present invention with reference to the above embodiments, and any modifications and equivalents not departing from the spirit and scope of the present invention are within the scope of the claims of the present invention as filed herewith.
Claims (4)
1. The local deep peak regulation expense allocation method for the power grid is characterized by comprising the following steps of:
the power dispatching control center calculates load prediction and negative standby;
judging whether to start local depth peak shaving;
if the local depth peak regulation is started, sequentially calling the thermal power unit;
calculating local depth peak regulation cost to obtain compensation cost;
According to the calling condition of the thermal power generating unit, the cost is allocated;
the judging whether to start local depth peak shaving specifically comprises the following steps:
The whole network negative standby is sufficient, or the original whole network negative standby is insufficient, after the whole network peak regulation, the whole network has no negative standby gap, but is influenced by the blocking of the section of the power grid, the thermal power unit in the blocking area operates by reducing the output of the thermal power unit to be lower than the compensated peak regulation reference value according to the electric power balance requirement, and the thermal power unit outside the blocking area has higher quality and lower price peak regulation resources which are not called, and the depth peak regulation at the moment is local depth peak regulation;
When the full-network negative standby is sufficient, the method specifically comprises the following steps: full-network negative standby is sufficient and full-network negative standby is insufficient, but after full-network peak shaving, a full-network does not have a negative standby gap;
if the local depth peak regulation is started, sequentially calling the thermal power unit; the method specifically comprises the following steps: when the full-network negative standby is sufficient, local depth peak shaving is started, and the sensitivity of the installation section of the thermal power generating unit in the blocking area is sequentially invoked from high to low;
The method for allocating the cost according to the calling condition of the thermal power generating unit specifically comprises the following steps: and in the unit statistical period, dividing the electric quantity of the called thermal power generating unit by the on-line electric quantity of a market main body in the blocking area of the power grid, and multiplying the electric quantity by the local depth peak regulation compensation cost in the blocking area.
2. The method for allocating local deep peak shaver charges for a power grid according to claim 1, wherein the power dispatching control center calculates load prediction and negative standby, and specifically comprises the following steps: and the power dispatching center carries out load prediction and negative standby calculation according to the peak shaving auxiliary service system, and judges whether to start local deep peak shaving.
3. The method for allocating local deep peak shaver costs for a power grid according to claim 1, wherein the local deep peak shaver costs are calculated to obtain compensation costs; the method comprises the following steps: the local depth peak regulation compensation cost is the sum of the compensation cost of the called thermal power generating unit; the compensation cost of the thermal power generating unit is the product of the local deep peak shaving electric quantity and the deep peak shaving settlement price of the thermal power generating unit in a unit statistical period.
4. A local peak shaver charge compensating device for a power grid, characterized in that a local deep peak shaver charge allocating method for a power grid as set forth in any one of claims 1-3 is adopted, comprising:
The power grid negative standby module is used for calculating load prediction and negative standby by the power dispatching control center;
the judging module is used for judging whether to start local depth peak shaving;
The thermal power generating unit calling module is used for calling the thermal power generating unit in sequence if the local depth peak regulation is started;
The compensation cost calculation module is used for calculating the local depth peak regulation cost to obtain compensation cost;
And the apportionment expense calculation module is used for apportioning expenses according to the calling condition of the thermal power generating unit.
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| CN111882146B (en) * | 2020-06-10 | 2023-12-22 | 国家电网公司华北分部 | Cost allocation method and computing equipment for thermal power unit reconstruction |
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