CN112785166A - Block chain-based power distribution network distributed generation unit output evaluation method and device - Google Patents
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Abstract
The invention provides a block chain-based power distribution network distributed generation unit output evaluation method, which comprises the following steps of: establishing a distributed generation unit evaluation model based on a block chain system; collecting data information of a distributed power generation unit of a power distribution network; processing data information of the distributed power generation units to obtain output evaluation values of the distributed power generation units; sorting the output evaluation values of the distributed power generation units to output evaluation sorting results; and writing the output evaluation sequencing result into the block chain system. The invention further provides a device for evaluating the output of the distributed power generation unit of the power distribution network based on the block chain. The method can provide important reference for the problem of energy abandon of the distributed generation energy caused by randomness and difficult predictability, and improve the power generation consumption degree of the distributed energy represented by wind and light, thereby improving the consumption level of the distributed energy; the evaluation data is stored in the block chain system, so that the problem of information leakage caused by a central mechanism can be effectively solved.
Description
Technical Field
The invention relates to the technical field of electric power energy, in particular to a block chain-based power distribution network distributed generation unit output evaluation method and device.
Background
In recent years, distributed energy sources such as distributed photovoltaic power generation, energy storage and electric vehicles in China are rapidly developed under the guidance of national policy support and sustainable development targets. Meanwhile, the problem of electric network energy abandon caused by the randomness of electric vehicles and the output fluctuation and intermittence of renewable energy sources becomes a main bottleneck for restricting the sustainable development of distributed renewable energy sources in China. Because clean energy such as wind energy, solar energy and the like has unsteady characteristics such as discontinuity, instability, uncontrollable and the like, the energy abandonment problem is always accompanied and restricted by the development of clean energy in China. In addition, the cost of the power generation side such as wind power and solar energy is obviously reduced, and the cost of the power grid side becomes a main factor for large-scale utilization of wind energy and solar energy. The energy storage technology is the most effective scheme for solving the instability of clean energy power generation, and the development potential of the clean energy is influenced to a great extent. The energy storage is an important subdivision field of the energy industry, and has important significance in the aspects of improving the utilization rate of clean energy, optimizing a power supply structure, protecting the environment and the like. In addition, distributed generation energy in the power grid is strong in randomness, large in fluctuation and dispersed in regions, the stability of the power grid is reduced when the distributed generation energy is greatly merged into the power grid, and meanwhile, the management cost of the power grid is increased, and the operation efficiency is reduced.
The existing problems are solved by the following methods: one is that: a block chain service evaluation method is executed in a terminal and comprises the following steps: (1) establishing a block chain service evaluation model; wherein the evaluation model comprises technical requirements, service requirements, compliance requirements and management requirements; (2) collecting information of a block chain service item to be evaluated; wherein the information comprises technical characteristics, service information, compliance information and management information; (3) inputting the collected information into the evaluation model; (4) comparing the information to evaluation requirements in the evaluation model; (5) and outputting an evaluation result. The method can comprehensively evaluate the block chain service items, reduces the interference of human subjective factors through a computer technology, and improves the objective degree of evaluation. The other is as follows: a comprehensive evaluation method for promoting the utilization value of clean energy by storing energy solves the technical problem of power generation and grid connection of clean energy represented by wind and light in the prior art, and improves the consumption level of renewable energy. The method comprises the following steps: (1) screening the initial index set by combining a subjective screening method and an objective screening method, and obtaining a multi-dimensional evaluation index system for evaluating the utilization value of the stored energy and promoted clean energy through the screened index set by detecting the relevance and the reliability; (2) normalizing all indexes in the multi-dimensional evaluation index system for evaluating the utilization value of the stored energy and promoted clean energy, and calculating the weight of the indexes; (3) constructing a judgment matrix corresponding to an evaluated object; (4) and (4) carrying out fuzzy transformation according to the weight of the index in the step (2) and the evaluation matrix in the step (3), and outputting the evaluation result of the evaluated object.
In the prior art, an evaluation system of a comprehensive evaluation method for storing energy and promoting the utilization value of clean energy is easy to attack and has information leakage risk, and a centralized system is low in operation efficiency when a large number of events are processed; for the block chain service evaluation method, although evaluation is performed on a block chain service item, a specific evaluation algorithm is not designed, so that an evaluation result is inaccurate.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention provides a block chain-based power distribution network distributed generation unit output evaluation method and device. The output of the power generation unit can be evaluated, the power generation unit with better evaluation represents that the output characteristic is better, the influence on the power grid is smaller, and the power generation unit with worse evaluation is forbidden to be connected into the power grid.
The scheme provided by the invention is as follows:
the evaluation method for the output of the distributed power generation unit of the power distribution network based on the block chain comprises the following steps:
establishing a distributed generation unit evaluation model based on a block chain system;
collecting data information of a distributed power generation unit of a power distribution network;
processing data information of the distributed power generation units to obtain output evaluation values of the distributed power generation units;
sorting the output evaluation values of the distributed power generation units to output evaluation sorting results;
and writing the output evaluation sequencing result into the block chain system.
The further technical scheme of the invention is as follows: the establishing of the distributed power generation unit evaluation model based on the block chain system specifically comprises the following steps: each distributed power generation unit comprises an intelligent electric meter, the block chain system is installed in the intelligent electric meter, and the intelligent electric meter controls power generation of the distributed power generation units.
The further technical scheme of the invention is as follows: the blockchain system comprises:
the file generation unit is used for generating related starting files comprising certificates, founding blocks, channels and system configuration files;
the starting node unit is used for positioning the block chain system and starting the nodes, and comprises the node adding channel and the updating of the anchor node;
and the chain code installing unit is used for installing the nodes and instantiating the chain codes.
The further technical scheme of the invention is as follows: the method comprises the steps of collecting data information of a distributed power generation unit of the power distribution network; the method specifically comprises the following steps: the method comprises the steps of collecting power generation and utilization information issued by each distributed power generation unit, wherein the power generation and utilization information comprises power generation amount in a time period, a prediction deviation value, a line loss value after power generation and a historical evaluation result.
The further technical scheme of the invention is as follows: processing the data information of the distributed power generation units to obtain output evaluation values of the distributed power generation units; the method specifically comprises the following steps:
calculating a controllability index according to the actual power generation value and the prediction deviation value of the renewable energy source;
calculating an economic index according to the line loss;
calculating a sustainability index according to a historical evaluation result;
calculating a target integrating degree index;
and carrying out weighted summation on the controllability index, the economic index, the sustainability index and the fitness index to obtain a final evaluation value of the distributed power generation unit.
Further, the controllability index is calculated as follows:
the controllability index mainly comprises two parts, wherein the first part is the actual power P generated by the renewable energy sourcewThe second part represents the fluctuating value of the renewable energy, i.e. the energy deviation due to the randomness of the renewable energy, and this part consists of the ratio under the power covariance, where f is the weighting parameter of the different output and reliability functions.
Further, the economic indicator is calculated as follows:
wherein, betajRepresents the weight value of the comprehensive evaluation algorithm etaiRepresenting the line loss rate of the power grid in the ith energy transaction process, diRepresenting the energy transmission distance under the corresponding energy transaction, and K is the transaction frequency value of the distributed power generation unit.
Further, the sustainability index is calculated as follows:
wherein R isKRepresenting historical trading evaluation value, K is a trading frequency value of the distributed power generation unit, RiIs the i transaction evaluation value.
Further, the target fit index is calculated as follows:
wherein ξjRepresents the weight value of the target fitting comprehensive evaluation algorithm, lambdaiRepresenting the weight of the green energy parameter, E, corresponding to different energy typeswFor the total power generation amount of the power grid energy in the period of time, PwThe power generation capacity of renewable energy sources.
The invention also provides a device for evaluating the output of the distributed power generation unit of the power distribution network based on the block chain, which comprises the following components:
the evaluation model unit is used for establishing a distributed generation unit evaluation model based on the block chain system;
the data acquisition unit is used for acquiring data information of the distributed power generation unit of the power distribution network;
the data processing unit is used for processing the data information of the distributed power generation unit to obtain an output evaluation value of the distributed power generation unit;
the evaluation sequencing unit is used for sequencing the output evaluation values of the distributed power generation units and outputting output evaluation sequencing results;
and the evaluation result output unit is used for writing the output evaluation sequencing result into the block chain system.
The invention has the beneficial effects that:
the evaluation algorithm based on the block chain technology is applied to the distributed unit power generation side, so that an important reference can be provided for the energy abandoning problem of distributed power generation energy caused by randomness and difficult predictability, the power generation consumption degree of the distributed energy represented by wind and light is improved, and the consumption level of the distributed energy is improved. In addition, the evaluation data provided by the invention is stored in the block chain system, so that the problem of information leakage caused by a central mechanism can be effectively solved.
Drawings
Fig. 1 is a flow chart of a distributed generation unit output evaluation method for a power distribution network based on a block chain, which is provided by the invention;
FIG. 2 is a block chain system structure diagram according to the present invention;
fig. 3 is a structural diagram of a distributed power generation unit output evaluation device of a power distribution network based on a block chain.
Detailed Description
The conception, specific structure, and technical effects of the present invention will be described clearly and completely with reference to one embodiment and the accompanying drawings to fully understand the objects, features, and effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention.
Referring to fig. 1, it is a flowchart of a distributed power generation unit output evaluation method for a power distribution network based on a block chain according to the present invention;
as shown in fig. 1, the evaluation method for the output of the distributed power generation unit of the power distribution network based on the block chain includes the following steps:
103, processing data information of the distributed power generation units to obtain output evaluation values of the distributed power generation units;
104, sorting the output evaluation values of the distributed power generation units and outputting output evaluation sorting results;
and 105, writing the output evaluation sequencing result into the block chain system.
In the embodiment of the invention, a distributed generation unit evaluation model based on a block chain system is established, wherein the evaluation model comprises technical requirements and evaluation requirements; the data information of the distributed power generation unit of the power distribution network is collected, and the data information comprises the following steps: line power flow constraint information, node electricity generation and utilization data information, loss information and node number information; in the embodiment of the invention, the evaluation algorithm is executed in the Ubuntu system terminal.
In step 101, establishing a distributed power generation unit evaluation model based on a blockchain system, specifically including: each distributed power generation unit comprises an intelligent electric meter, the block chain system is installed in the intelligent electric meter, and the intelligent electric meter controls power generation of the distributed power generation units.
Referring to fig. 2, wherein the blockchain system includes:
a file generating unit 111, configured to generate related start-up files, including certificates, founder blocks, channels, and system configuration files;
a node starting unit 112, configured to locate and start a node of the blockchain system, including node joining channel and updating an anchor node;
and a chain code installing unit 113 for installing the nodes and instantiating the chain codes.
In the embodiment of the invention, the file generation unit is used for starting the blockchain system, after the blockchain system is started, the anchor node is used for positioning the blockchain system, and the chain code in the blockchain system can be used on the distributed power generation unit after being instantiated.
In the embodiment of the invention, the processes of file generation, node adding in a channel, chain code installation, chain code instantiation and the like are all realized by inputting an operation command through a terminal. For example, the file generation commands are: sudo cryptogen generator-config ═ crypto-config.yaml; and (3) adding the node into the channel: peer CHANNEL join-b $ CHANNEL _ NAME.block > & log.txt; chain code instantiation: a Peer chainccode instant.
In step 102, collecting data information of a distribution network distributed power generation unit; the method specifically comprises the following steps: the method comprises the steps of collecting power generation and utilization information issued by each distributed power generation unit, wherein the power generation and utilization information comprises power generation amount in a time period, a prediction deviation value, a line loss value after power generation and a historical evaluation result.
In the embodiment of the invention, the electricity utilization information is collected respectively aiming at four angles of controllability, economy, sustainable development and target conformity.
(1) Controllability: the controllability is evaluated according to the energy number demand issued by the units, the standard evaluation needs to consider two aspects, the energy capacity and the capacity difference value provided by the distributed units, the producers and consumers generated due to the development of the distributed energy mainly sell renewable energy, the most extensive index for measuring the attributes of the renewable energy is the capacity credit, and the capacity credit consists of the actual power generation value and the prediction deviation value of the renewable energy.
(2) The economic efficiency is as follows: this information is directed to the actual physical constraints. Each node in the blockchain system may store the actual line parameters, including line impedance and admittance, in a local database. When distributed energy output evaluation is carried out, the economic index considered is mainly in the line loss. In most cases of energy trading, a direct proportional relationship between transmission distance and energy loss often exists, and the energy loss is higher as the energy transmission distance is longer, so that the promotion of close-distance energy trading often can realize more excellent line loss.
(3) Sustainability: since the force generation characteristic of the distributed renewable energy is influenced by attributes such as wind power, photovoltaic and the like with strong randomness, evaluation using long-term historical data is more accurate than evaluation using data in a short term. This requirement is being adapted to the block chain characteristics. The blockchain records all historical data of producers and consumers of the blockchain system, each block represents the recorded content in a certain period of time, and the whole blockchain records all historical data of renewable energy nodes. This standard records estimates of previous transactions by the prenatal and xiator.
(4) Target compatibility: with respect to renewable energy power generation, today's society encourages and guides users to use renewable energy to replace traditional non-renewable resources for power generation. For some distributed units that dominate the green generation goal, the goal is to generate as much renewable energy as possible.
The output of the distributed power generation unit refers to the energy output by the power generation unit in unit time. Also known as the power generation unit output power. The average of the 24 hour output of the power generation unit is called the daily average output. The integral value of the output along with the time in one day is the daily generated energy of the generating unit, and the output information comprises the unit output power value and the deviation value.
In step 103, processing data information of the distributed power generation units to obtain output evaluation values of the distributed power generation units; the method specifically comprises the following steps:
calculating a controllability index according to the actual power generation value and the prediction deviation value of the renewable energy source;
calculating an economic index according to the line loss;
calculating a sustainability index according to a historical evaluation result;
calculating a target integrating degree index;
and carrying out weighted summation on the controllability index, the economic index, the sustainability index and the fitness index to obtain a final evaluation value of the distributed power generation unit.
In the embodiment of the invention, the predicted power generation information of the distributed power generation unit nodes is used as the input data of the weight evaluation algorithm provided by the invention. The weight evaluation algorithm evaluates all indexes in the evaluation index system of the invention, and calculates all evaluation index values to be added.
In the embodiment of the invention, the controllability index is calculated as follows:
the controllability index mainly comprises two parts, wherein the first part is the actual power P generated by the renewable energy sourcewThe second part represents the fluctuating value of the renewable energy, i.e. the energy deviation due to the randomness of the renewable energy, and this part consists of the ratio under the power covariance, where f is the weighting parameter of the different output and reliability functions.
And for the controllability index, calculating the weight occupied by the predicted power generation value of each distributed unit and the weight occupied by the deviation value, wherein the evaluation result of the controllability index of each distributed power generation unit is that the predicted power generation value is multiplied by the evaluation weight, and the deviation value is subtracted by the weight occupied by the deviation value.
Wherein the economic indicators are calculated as follows:
wherein, betajRepresents the weight value of the comprehensive evaluation algorithm etaiRepresenting the line loss rate of the power grid in the ith energy transaction process, diRepresenting the energy transmission distance under the corresponding energy transaction, and K is the transaction frequency value of the distributed power generation unit.
The sustainable index is calculated as follows:
wherein R isKRepresenting historical trading evaluation value, K is a trading frequency value of the distributed power generation unit, RiIs the i transaction evaluation value.
The target fit index is calculated as follows:
wherein ξjRepresents the weight value of the target fitting comprehensive evaluation algorithm, lambdaiRepresenting the weight of the green energy parameter, E, corresponding to different energy typeswFor the total power generation amount of the power grid energy in the period of time, PwThe power generation capacity of renewable energy sources.
In the embodiment of the invention, a block chain system development platform is used, a distributed database is used, the distributed database is not falsifiable, and the data is trusted. The information security problem can be solved. And meanwhile, the distributed characteristic of the system can enable the system to be used for processing the problem of power generation unit consumption with distributed characteristic. A weight evaluation algorithm is designed for evaluation of distributed units of the power distribution network, four evaluation standards of controllability, economy, sustainable development and target conformity are comprehensively considered, and the problem of inaccurate evaluation of the distributed units caused by the lack of the evaluation algorithm is effectively solved.
Referring to fig. 3, the present invention further provides a device for evaluating output of distributed power generation units of a power distribution network based on a block chain, including:
the evaluation model unit 201 is used for establishing a distributed generation unit evaluation model based on a block chain system;
the data acquisition unit 202 is used for acquiring data information of the distributed power generation units of the power distribution network;
the data processing unit 203 is used for processing data information of the distributed power generation units to obtain output evaluation values of the distributed power generation units;
the evaluation sequencing unit 204 is used for sequencing the output evaluation values of the distributed power generation units and outputting output evaluation sequencing results;
the evaluation result output unit 205 is configured to write the output evaluation sorting result into the blockchain system.
In this embodiment, various changes and specific examples of the evaluation method for the output of the distributed power generation unit of the power distribution network based on the block chain are also applicable to the evaluation device for the output of the distributed power generation unit of the power distribution network based on the block chain in this embodiment.
In the embodiment of the invention, the energy types can be divided into thermal power generation, hydroelectric power generation, photovoltaic power generation, wind power generation and the like; the green energy refers to renewable energy and clean energy, such as hydroelectric power, wind power, solar energy, biological energy (biogas) and sea tide energy. Renewable energy sources do not have the possibility of energy exhaustion, so the development and utilization of renewable energy sources are increasingly paid attention by many countries, especially the countries with energy shortage. In practical applications, the specific weight value can be adjusted according to practical requirements. If the weight of the clean energy is increased, the green energy can be increased.
And calculating the weight of each index and adding the weights to obtain the final evaluation value of the distributed power generation unit, and using the evaluation value as the input value of the next evaluation algorithm. And sequencing according to the evaluation value of the distributed power generation units and the number of the distributed power generation units.
And calculating the weight of each index according to each index and adding the weights to obtain the final evaluation value of the distributed power generation unit. For example, after a certain evaluation, the first evaluation value of the distributed power generation unit is 1, the second evaluation value of the distributed power generation unit is 1.14, and the third evaluation value of the distributed power generation unit is 0.85. The sequencing result is that the distributed unit is ranked the first number two, the distributed unit is ranked the second number one, and the distributed unit is ranked the third number three.
For example: and only considering three indexes of controllability, economy and sustainable development, and calculating to obtain the weight value vector according to the index formula. a is1×3＝[0.23 0.5 0.27]And a represents a first controllability index, 0.23 is a first evaluation result of the distributed unit, 0.5 is a second evaluation result of the distributed unit, and 0.27 is a third evaluation result of the distributed unit, which is as follows:
b1×3＝[0.44 0.31 0.25]；
c1×3＝[0.33 0.33 0.33]；
the sum gives the final evaluation:
T1×13＝[1 1.14 0.85]；
the distributed unit number one ranks second, the distributed unit number two ranks first, and the distributed unit number three ranks third. The power generation unit with better evaluation has better output characteristics, has less influence on the power grid, and forbids the power generation unit with poorer evaluation to be connected to the power grid. Therefore, the absorption of the distributed power generation unit in the power distribution network can be promoted. In addition, the higher the recommendation order of the distributed units is, the higher the priority level when the control adjustment is performed on the power grid is. By establishing a high evaluation value standard, energy high-benefit driving and excitation are formed, and an evaluation result and related policies can be fed back to an adjustment system in time, so that the resource allocation capability is effectively improved. And writing the calculated evaluation value into a block chain through an intelligent contract, and recording the evaluation value for the next evaluation.
The evaluation algorithm based on the block chain technology is applied to the distributed unit power generation side, so that an important reference can be provided for the energy abandoning problem of distributed power generation energy caused by randomness and difficult predictability, the power generation consumption degree of the distributed energy represented by wind and light is improved, and the consumption level of the distributed energy is improved. In addition, the evaluation data provided by the invention is stored in the block chain system, so that the problem of information leakage caused by a central mechanism can be effectively solved.
The present invention has been described in detail, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention within the knowledge of those skilled in the art. Many other changes and modifications can be made without departing from the spirit and scope of the invention. It is to be understood that the invention is not to be limited to the specific embodiments, but only by the scope of the appended claims.
Claims (10)
1. The block chain-based output evaluation method for the distributed power generation units of the power distribution network is characterized by comprising the following steps of:
establishing a distributed generation unit evaluation model based on a block chain system;
collecting data information of a distributed power generation unit of a power distribution network;
processing data information of the distributed power generation units to obtain output evaluation values of the distributed power generation units;
sorting the output evaluation values of the distributed power generation units to output evaluation sorting results;
and writing the output evaluation sequencing result into the block chain system.
2. The evaluation method according to claim 1, wherein the establishing of the evaluation model of the distributed power generation unit based on the blockchain system specifically comprises: each distributed power generation unit comprises an intelligent electric meter, the block chain system is installed in the intelligent electric meter, and the intelligent electric meter controls power generation of the distributed power generation units.
3. The evaluation method according to claim 1, wherein the blockchain system comprises:
the file generation unit is used for generating related starting files comprising certificates, founding blocks, channels and system configuration files;
the starting node unit is used for positioning the block chain system and starting the nodes, and comprises the node adding channel and the updating of the anchor node;
and the chain code installing unit is used for installing the nodes and instantiating the chain codes.
4. The evaluation method according to claim 1, wherein the data information of the distributed power generation units of the power distribution network is collected; the method specifically comprises the following steps: the method comprises the steps of collecting power generation and utilization information issued by each distributed power generation unit, wherein the power generation and utilization information comprises power generation amount in a time period, a prediction deviation value, a line loss value after power generation and a historical evaluation result.
5. The evaluation method according to claim 1, wherein the data information processing of the distributed power generation units obtains output evaluation values of the distributed power generation units; the method specifically comprises the following steps:
calculating a controllability index according to the actual power generation value and the prediction deviation value of the renewable energy source;
calculating an economic index according to the line loss;
calculating a sustainability index according to a historical evaluation result;
calculating a target integrating degree index;
and carrying out weighted summation on the controllability index, the economic index, the sustainability index and the fitness index to obtain a final evaluation value of the distributed power generation unit.
6. The evaluation method according to claim 5, wherein the controllability index is calculated as follows:
wherein the content of the first and second substances,the controllability index is mainly composed of two parts, the first part is the actual power P generated by renewable energy sourceswThe second part represents the fluctuating value of the renewable energy, i.e. the energy deviation due to the randomness of the renewable energy, and this part consists of the ratio under the power covariance, where f is the weighting parameter of the different output and reliability functions.
7. The evaluation method according to claim 5, wherein the economic indicator is calculated as follows:
wherein, betajRepresents the weight value of the comprehensive evaluation algorithm etaiRepresenting the line loss rate of the power grid in the ith energy transaction process, diRepresenting the energy transmission distance under the corresponding energy transaction, and K is the transaction frequency value of the distributed power generation unit.
8. The evaluation method according to claim 5, wherein the sustainability index is calculated as follows:
wherein R isKRepresenting historical trading evaluation value, K is a trading frequency value of the distributed power generation unit, RiIs the i transaction evaluation value.
9. The evaluation method according to claim 5, wherein the target fit index is calculated as follows:
wherein ξjComprehensive evaluation representing target contractWeight value of the price algorithm, λiRepresenting the weight of the green energy parameter, E, corresponding to different energy typeswFor the total power generation amount of the power grid energy in the period of time, PwThe power generation capacity of renewable energy sources.
10. The evaluation method for the output of the distributed power generation unit of the power distribution network based on the block chain according to any one of claims 1 to 9, which provides an evaluation device for the output of the distributed power generation unit of the power distribution network based on the block chain, and comprises the following steps:
the evaluation model unit is used for establishing a distributed generation unit evaluation model based on the block chain system;
the data acquisition unit is used for acquiring data information of the distributed power generation unit of the power distribution network;
the data processing unit is used for processing the data information of the distributed power generation unit to obtain an output evaluation value of the distributed power generation unit;
the evaluation sequencing unit is used for sequencing the output evaluation values of the distributed power generation units and outputting output evaluation sequencing results;
and the evaluation result output unit is used for writing the output evaluation sequencing result into the block chain system.
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