Electricity Recovery Research Articles

Energy, exergy, economic performance investigation and multi-objective optimization of reversible heat pump-organic Rankine cycle integrating with thermal energy storage

Reversible heat pump-organic Rankine cycle (HP-ORC) system is a kind of prospective energy storage technology, which can store the surplus electricity and waste heat recovery simultaneously and realize a high round-trip efficiency even beyond 100%. However, the comprehensive evaluation of energy, exergy and economic performance of HP-ORC are still not enough as a novel system, hindering the deep understanding and further development and application. This study will first select proper candidate working fluids based on theoretical analysis of the thermophysical properties and operating characteristics of HP-ORC system. Then effects of different combinations of crucial parameters in HP-ORC system are evaluated on the energy, exergy and economic performance. Finally, multi-objective optimization will be conducted to analyze the optimal performance of HP-ORC system under designed parameters. The optimization results indicate that R245ca is the optimal working fluid among all the investigated working fluids. Under the optimal parameters, the exergy destruction during the discharging cycle accounts for 68.23% during the reversible operating process, which is significantly greater than that of the charging cycle. In the discharging cycle, the top three exergy destruction are successively taken by the evaporation process, expansion process and condensation process cycle, and the corresponding proportions are 26.81, 21.67% and 19.54% respectively.

Economic, technical, and environmental evaluation of retrofitting scenarios in a full-scale industrial wastewater treatment system

The use of mathematical models is a well-established procedure in the field of (waste) water engineering to “virtually” evaluate the feasibility of novel process modifications. In this way, only options with the highest chance of success are further developed to be implemented at full-scale, while less interesting proposals can be disregarded at an early stage. Nevertheless, there is still lack of studies, where different plant-wide model predictions (effluent quality, process economics, and technical aspects) are comprehensibly verified in the field with full-scale data. In this work, a set of analysis/evaluation tools are used to assess alternative retrofitting options in the largest industrial wastewater treatment plant in Northern Europe. A mechanistic mathematical model is simulated to reproduce process behavior (deviation < 11%). Multiple criteria are defined and verified with plant data (deviation < 5%). The feasibility of three types of scenarios is tested: (1) stream refluxing, (2) change of operational conditions and (3) the implementation of new technologies. Experimental measurements and computer simulations show that the current plant´s main revenues are obtained from the electricity produced by the biogas engine (54%) and sales of the inactivated bio-solids for off-site biogas production (33%). The main expenditures are the discharge fee (39%), and transportation and handling of bio-solids (30%). Selective treatment of bio-solid streams strongly modifies the fate of COD and N compounds within the plant. In addition, it increases revenues (+3%), reduces cost (-9%) and liberates capacity in both activated sludge (+25%) and inactivation reactors (+50%). Better management of the buffer tank promotes heterotrophic denitrification instead of dissimilatory nitrate conversion to ammonia. In this way, 11% of the incoming nitrogen is removed within the anaerobic water line and does not overload the activated sludge reactors. Only a marginal increase in process performance is achieved when the anaerobic granular sludge reactor operates at full capacity. The latter reveals that influent biodegradability is the main limiting factor rather than volume. Usage of either NaOH or heat (instead of CaO) as inactivation agents allows anaerobic treatment of the reject water, which substantially benefits revenues derived from higher electricity recovery (+44%). However, there is a high toll paid on chemicals (+73%) or heat recovery (-19%) depending on the inactivation technology. In addition, partial nitration/Anammox and a better poly-aluminum chloride (PAC) dosage strategy is necessary to achieve acceptable (< 2%) N and P levels in the effluent. The scenarios are evaluated from a sustainability angle by using life cycle impact assessment (LCIA) in form of damage stressors grouped into three categories: human health, ecosystems quality, and resource scarcity. The presented decision support tool has been used by the biotech company involved in the study to support decision-making on how to handle future expansions.

Comparative anaerobic digestion of sewage sludge at different temperatures with and without heat pre-treatment

Anaerobic digestion of sewage sludge is generally conducted under mesophilic (around 35 °C) or thermophilic (around 55 °C) conditions, whereas it is conducted at lower temperatures in some wastewater treatment plants without heating. In this study, we compared the anaerobic digestion of sewage sludge at 15, 25, 30, 35, 45, and 55 °C following hyperthermophilic pre-treatment at 80 °C for 24 h. Laboratory-scale reactors were operated continuously for more than 1000 days, and batch experiments were performed to evaluate the reaction kinetics. Biogas production rates at 15 °C with and without pre-treatment divided by that at 35 °C without pre-treatment were 0.73 and 0.78, respectively. The dewaterability of the digested sludge was evaluated by the capillary suction time (CST). The CST was approximately 50 s at 15 °C with and without pre-treatment and was slower than the CST at 35 °C. Compared to the shear rate, viscosity was higher at lower temperatures; however, it decreased with pre-treatment, which reduced the energy required for mixing in the reactors. Pre-treatment eliminated Escherichia coli from the sludge; however, E. coli (approximately 105 colony forming unit/g-total solids) was detected after digestion at temperatures ≤30 °C. Pre-treatment was also useful to replace a part of heat treatment required for digested sludge before it was used as fertilizer. Gene sequencing analyses indicated the effects of pre-treatment and digestion temperature on the microbial community in the digested sludge. Co-generation of biogas is useful to obtain both electricity and heat; however, heat from co-generation is sometimes limited. To maximize electricity recovery, the use of low temperature digesters has the potential to reduce fuel costs. The results indicate that anaerobic digestion at low temperatures with or without heat pre-treatment can be an efficient and cost-effective method of treating sewage sludge.

Is pyrolysis technology an advisable choice for municipal solid waste treatment from a low carbon perspective?

With worldwide concern about climate change, waste-to-fuel technologies have been revived in the argument over whether waste-to-energy is still the best choice. A process-oriented life cycle assessment for municipal solid waste (MSW) was performed on the basis of full-scale operational data to compare the carbon footprints of the pyrolysis technology enhanced by mechanical and biological treatment (MBT) and incineration technology. Material and carbon flow analyses reveal that MBT produces refuse-derived fuels (RDFs) of 330 kg/ton MSW for pyrolysis, in which 67% of the carbon ends up in tar and char. Based on the Chinese energy structure in 2020 and MSW composition with 13% plastics, incineration and MBT–pyrolysis provide similar net carbon savings around 200 kg CO2-eq/ton. As the MSW contains more plastic fraction and the energy system becomes greener, the carbon savings from MBT–pyrolysis are less affected compared with those from incineration. The full-scale MBT–pyrolysis was verily optimised to maximise the RDF production and yield more tar and less syngas by identifying the important parameters, resulting in 30% higher savings in carbon footprint. With the energy structure at year 2050, the carbon footprints from MBT–pyrolysis are completely superior to that from incineration, regardless of the waste composition and heat recovery. From the low carbon perspective, fuel recovery with MBT − pyrolysis deserves priority over electricity recovery with incineration. This potential difference between waste-to-fuel and waste-to-energy technologies is for the first time quantitatively identified, and thus calls for a reconsideration on the long-term waste management and technological improvements.

Enhancing biogas and electricity recovery using an iron-manganese oxide catalyzed bioanode in an integrated submersible microbial fuel cell-anaerobic digester

Submersible microbial fuel cell-anaerobic digestion (SMFC-AD) systems offer biogas up-gradation along with electricity generation but require improved anodic kinetics for better performance. In this study, iron-manganese oxide (FeMnO3) nanoparticles were synthesized by chemical precipitation method and used as an anodic catalyst in SMFC-AD to improve the redox chemistry at anode thereby enhancing the overall reactor performance. Moreover, the performance of integrated SMFC-AD with and without the catalyst was evaluated under different external resistance (Rext) viz 10 Ω, 100 Ω, and 1000 Ω. SMFC-AD with the catalyst demonstrated a maximum methane yield of 0.436 ± 0.007 L-CH4/gCOD at a Rext of 1000 Ω, followed by a methane yield of 0.406 ± 0.008 L-CH4/gCOD and 0.384 ± 0.003 L-CH4/gCOD at 10 Ω and 100 Ω, respectively. However, SMFC-AD at 100 Ω exhibited the maximum current and power generations of 2.11 mA and 0.46 W/m2, respectively, which were significantly higher than the values obtained for 10 Ω (0.22 mA, 0.21 W/m2) and 1000 Ω (0.38 mA, 0.19 W/m2). Microbial community analyses revealed the enrichment of exoelectrogenic and methanogenic microbial consortia (Geobacter and Methanobacteria) in the anodic biofilm increasing the interspecies electron transfer reactions.

APPLICATION OF CRYOGENIC THERMOELECTRIC GENERATORS IN ENERGY STORAGE SYSTEMS

Features of application of cryogenic thermoelectric generators in the systems of accumulation of the electric power using liquefied air (LAES) are considered. It is shown that the use of cryogenic thermoelectric generators as a heat exchanger-evaporator of the LAES scheme allows to increase the coefficient of electricity recovery by 10–15 % and reduce the equalized cost of electricity by almost 3 times — up to 0.03 $/kWh. The conclusion on expediency of application of similar schemes of accumulation of the electric power in the distributed power systems of the future is made. Bibl. 15, Fig. 3.

Co9S8 nanoparticles encapsulated in N,S co-doped hierarchical carbon as an efficient oxygen reduction electrocatalyst for microbial fuel cells

• Co 9 S 8 @HN/S-C (Co 9 S 8 encapsulated in N/S co-doped porous carbon) is successfully synthesized. • Co 9 S 8 @HN/S-C exhibits high ORR electrocatalytic in alkaline and neutral media. • MFCs with Co 9 S 8 @HN/S-C show high power density of 1436.5mWm −2. • Outstanding chemical oxygen demand (COD) removal rate (80%) The Co 9 S 8 nanoparticles encapsulated in a N/S co-doped hierarchical porous carbon (Co 9 S 8 @HN/S-C) is successfully synthesized to accelerate oxygen reduction reaction (ORR) of microbial fuel cell (MFC). Herein, we prepared the Co 9 S 8 @HN/S-C catalyst using a bimetallic (Zn, Co) zeolite imidazolium salt framework as the precursor, which is carbonized at high temperature and then treated with thiourea pyrolysis. The Co 9 S 8 @HN/S-C catalyst exhibits an abundant porous structure (pore volume ≈ 0.46 cm 3 g −1 ) and high specific surface area (485 m 2 g −1 ). Benefiting from the active Co 9 S 8 species and N/S co-doped hierarchical porous carbon (HN/S-C), the Co 9 S 8 @HN/S-C exhibits excellent ORR properties in alkaline solution. The half-wave potential (E 1/2 ) and an onset potential are 0.91 V and 1.01 V (vs. RHE), respectively, which outperforms most previously reported non-precious metal catalysts. In addition, the assembled MFC with Co 9 S 8 @HN/S-C as cathode catalyst also exhibits excellent electrical performance and stability, with the maximum output power density of 1436.5 mW m −2 and a stable output voltage of 0.59 V, which is better than the most recently reported MFC cathode materials, such as Co 9 S 8 /NHCS (704 mW m −2 , 0.5 V) and Co/Co 9 S 8 /NPG (1156 mW m −2 , 0.562 V), etc. More notably, the outstanding chemical oxygen demand (COD) removal rate can reach 80%, and the coulomb efficiency of Co 9 S 8 @HN/S-C based MFC is also better than that of commercial Pt/C. This universal method can be widely used to prepare high-performance electrocatalysts for MFC in wastewater treatment and recovery of electricity.

Estimation of Reduced Greenhouse Gas Emission from Municipal Solid Waste Incineration with Electricity Recovery in Prefecture- and County-Level Cities of China

Estimation of Reduced Greenhouse Gas Emission from Municipal Solid Waste Incineration with Electricity Recovery in Prefecture- and County-Level Cities of China

ЩОДО ПРАВОВОЇ ПРИРОДИ ВАРТОСТІ НЕОБЛІКОВАНОЇ ЕЛЕКТРИЧНОЇ ЕНЕРГІЇ У СФЕРІ ГОСПОДАРЮВАННЯ

The article is devoted to the study of the legal nature of the cost of unaccounted electricity, the calculation of which is a consequence of the commission of relevant offenses in sphere of economic activities. Attention is drawn to the problem of qualification of the cost of unaccounted electricity and the active dynamics of changing the positions of the judiciary on the issue, the lack of a common position on the legal nature of these losses. It is noted that economic courts do not make a legal assessment of such losses in the process of considering cases for cost recovery of unaccounted electricity or such an assessment is debatable. It is noted also that the cost of unaccounted electricity in law enforcement practice qualifies as operational-economic sanctions, and as losses, and as payment for the cost of electricity (a special form of liability). In this regard, the key aspects of the application of such forms of economic and legal liability as operational-economic sanctions and compensation for losses are analyzed, the features of contractual debt are determined. Arguments are given that exclude the possibility of recognizing the accrual of the cost of unaccounted electricity by operational-economic sanctions. It is proved that the cost of unaccounted electricity is not a payment for the supplied electricity, including debt. Based on the analysis of the relevant rules of economic legislation and special regulations governing relations in the electricity market, and according to scientific positions on forms of economic liability and judicial practice of recovery of unaccounted electricity, arguments are presented and it is substantiated that disputes on recovery of unaccounted electricity in the field of economic activities are disputes over the recovery of losses, and the value of unaccounted electricity in the field of economic activities by its legal nature are losses in the form of the value of lost property.

Integrated environmental impacts and C-footprint reduction potential in treatment and recycling of express delivery packaging waste

The rapid development of e-commerce has resulted in a large amount of express delivery package waste (EDPW). The optimisation of EDPW systems is important to achieve low-carbon development. To quantify the impact and C-footprint reduction potential, a comprehensive life cycle assessment enhanced by parameterisation and global sensitivity analysis was conducted on Chinese EDPW systems managing fractions of cardboard, paper and envelope, foamed plastic, soft plastic and woven bag. Material flow analysis reveals that 65% of the EDPW is recycled and cardboard is the dominant contributor. The environmental impacts from EDPW to most impact categories are marginal, but the loads to global warming potentials and human toxicity are significant, mainly attributed to the energy and material consumption during package production. From C-footprint perspective, managing 1,000kg of EDPW would generate a load of 834.88 kg CO2-eq from raw material production and a saving of -524.55 kg CO2-eq from material and energy recovery. Paper and cardboard incineration can achieve carbon reduction with biogenic-CO2 emissions, while plastic incineration releases significant fossil-CO2 that counteracts the savings from energy recovery. Global sensitivity analysis identified proportion of incineration, heat and electricity recovery ratios in incinerators and recycling ratio of cardboard as the major contributors to result uncertainty. Optimising these parameters can achieve a carbon reduction of 177.86 kg CO2-eq per 1,000kg of EDPW. This paper provides a comprehensive view of the environmental impacts of EDPW in waste management system and novel insights into further optimisation and development of the system from a low-carbon perspective.

Simultaneous nitrification, denitrification and electricity recovery of Halomonas strains in single chamber microbial fuel cells for seawater sewage treatment

Simultaneous nitrification and denitrification (SND) by microbial fuel cell (MFC) holds great promise in the nitrogen removal from seawater sewage due to the harvest of electricity and low organic carbon requirement. However, this remains very difficult owing to the inhibition of microbial growth and metabolism by the high salinity. In this work, a halophilic bacterium Halomonas sp. B01 with both exoelectrogenic and SND capability in hypersaline environment was reported. Halomonas sp. B01 was screened from several Halomonas species considering their growth and electricity production abilities. Halomonas sp. B01 generated a high power density of 24.2 mW/m2 (0.61 W/m3) and efficient N removal rate of 93.8% in single chamber MFCs on seawater substrate. The nitrogen removal pathway of Halomonas sp. B01 was demonstrated to include (1) nitrification process coupled with electron-donating to the anode, and (2) denitrification process coupled with electron-accepting from the cathode. The present work represents a successful attempt to accomplish simultaneous SND and electricity production in MFCs by a single halophilic strain, which provides a theoretical and method support for the convenient treatment of seawater sewage.

Effect of external resistance on microbial electrochemical desalination, sewage treatment, power and resource recovery

Microbial desalination cell (MDC) has attracted attention as an eco-friendly technology to treat sewage and seawater with concurrent recovery of bioelectricity. External resistance (Rext) is one of the main factors that control it’s performances. This study optimized the performance of an MDC for removing COD and salinity at five different Rext of 150, 100, 50, 25, and 10 Ω. Columbic efficiency (CE) was measured to find the best Rext for MDC operation. Voltage polarization demonstrated that the MDC possessed an internal resistance (Rint) of 25–30 Ω and maximum power recovery of 302.25 mW/m2. The highest and lowest recovery of stable electricity was 20.7 mA and 3.6 mA at Rext of 10 and 150 Ω, respectively. The COD removal increased from 21% at Rext of 25 Ω to 57% at Rext of 150 Ω. The CE decreased from 58.3% to 4.32% with the gradual increase of Rext from 25 to 150 Ω suggesting the dominancy of exoelectrogens in biofilm at Rext ≤ Rint. The achieved desalination rate was 47% and 18% at Rext of 10 and 25 Ω, respectively. The performances of investigated MDC showed a great potential for recovering electricity with significant removal of organics from domestic sewage and salt from seawater.

Distributed cold storage in district cooling—Grid dynamics and optimal integration for a Swedish case study

District cooling (DC) is gaining interest with global warming and rising demands on indoor comfort. As DC grid expansions are capital intensive, cost effective alternatives to meet these rising cooling demands are desired. Integrating cold storage (CS) into the grids is one attractive choice, allowing peak shaving, load shifting, and renewable electricity recovery via power-to-cold. To analyze the impact of new CSs, the DC distribution grid dynamics must be investigated. This work evaluates the implementation of several new CSs into an existing DC system (called the base case-BC), to find the optimal solution. This is performed considering the case study DC system of Norrenergi AB, Sweden, catering to Solna and Sundbyberg via three production plants Solnaverket, Sundbybergsverket and Frösundaverket, and a 10 MW CS (in Solnaverket). The software tool Netsim is used for distribution grid dynamics analysis of the BC and three scenarios with additional cold storages, for the optimization of differential pressure (dP) of the grids to be within 100–800 kPa. These scenarios include: one additional 15 MW CS in Sundbybergsverket (Scenario 1), one additional 15 MW CS in Frösunda (Scenario 2) and two additional 3 MW CSs in Sundbybergsverket and Frösunda (Scenario 3). The CSs in Sundbybergsverket are centrally placed, whereas, those in Frösunda were positioned in a grid loop experiencing low differential pressure, identified in Netsim simulations of BC. The simulations were done for 24 h at 1-hour resolution, on a chosen historically highest demand day (02 August 2018). The results indicate that the optimal solution is implementing two additional CSs in Sundbybergsverket (centralized) and Frösunda (distributed), each with a capacity between 3–7.5 MW (6–15 MW total capacities). Further evaluations to determine the optimal sizing of these CSs is the next step in this study.

Multi-Criteria Analysis and Consequential Lifecycle Assessment of Solid Waste Management

Based on a case study comparing different approaches for management of organic waste generated in the city of Rio de Janeiro, Brazil, this study proposes the combination of consequential lifecycle assessment (CLCA) and multicriteria decision analysis (MCDA). Compared approaches were landfilling with energy recovery from landfill gas, source segregation of organics for anaerobic digestion and use of digestate as fertilizer, and finally, post-sorting of organics and landfilling of residual bio-solids. Seven different impact categories were assessed in the CLCA. In addition, recovery of electricity and macro nutrients were included as additional impact categories. The use of VIP analysis facilitates the interpretation of results aggregating them under different conditions. Furthermore, approaches for ranking of considered impact categories could be carried out both for a local or a global perspective. This, and the possibility of easily including additional context derived evaluation parameters, clearly highlights the combination of CLCA and VIP analysis for decision support.

Processing of biomethane for electricity production as a sustainable way to treat municipal organic solid waste: A case study of the Corumbataí river basin region

This study proposed action scenarios for urban solid waste management in six municipalities in the Corumbataí River Basin. The operating scenarios were designed for organic waste treatment and for the shared disposal of urban solid waste. Six municipalities were studied, five of which had less than 30,000 inhabitants (Analândia, Charqueada, Corumbataí, Ipeúna, and Santa Gertrudes). In addition, Rio Claro had 199,000 inhabitants. Thus, the transport and transshipment stages, general infrastructure, and final disposal in landfills were analyzed. Further, the three scenarios for organic waste treatment were conducted separately. The items and the cost of implementation were estimated for decentralized composting, centralized composting, and biomethanization of waste with electricity recovery. The biomethanization scenario included the commercialization of electricity, so it generated revenues that decreased costs. This cost reduction was especially notable in the last years of the project when the goals of diversion of organic waste through selective collection were higher. The results suggested that the investigated scenarios could improve organic waste treatment and that the biomethanization scenario with electricity generation presented lower average costs per inhabitant than the centralized and decentralized composting scenarios.

CRYOGENIC ACCUMULATION OF ELECTRICITY GENERATED USING RENEWABLE ENERGY SOURCES

Possibilities and prospects of accumulation of the electric power generated on objects of renewable energy sources - solar and wind power plants, with use of cryogenic liquids are considered. A comparison of the three most common ways of accumulating electricity: using lithium-ion batteries, hydrogen, liquid air. According to the proposed technology, the efficiency of recovery of electricity from liquid air is from 54 to 70%. The developed technology is based on cryogenic and thermal accumulation and has a high accumulation coefficient. It is shown that energy storage in cryogenic storage devices is the cheapest today. The proposed technology can also be used to generate electricity from liquefied natural gas using standard equipment developed by industry. The technological scheme of the cryoaccumulating station is offered. Bibl. 10, Fig. 1, Table 1.

Michaelis–Menten equation considering flow velocity reveals how microbial fuel cell fluid design affects electricity recovery from sewage wastewater

Hydrodynamics has received considerable attention for application in improving microbial fuel cell (MFC) performance. In this study, a method is proposed to calculate the effect of fluid flow on MFC current production from sewage wastewater. First, the effect of flow velocity in an up-flow channel was evaluated, where an air-core MFC was polarized with external resistance (Rext). When tested at a flow velocity ranging from 0 to 20 cm s−1, the MFC with the higher flow velocity produced more current. In sewage wastewater with a chemical oxygen demand (COD) of 76 mg L−1, the MFC polarized with 3 Ω of Rext, and a flow velocity of 20 cm s−1 had 5.4 times more current than the MFC operating in a no-flow environment. This magnitude decreased with higher Rext and COD values. The Michaelis–Menten equation, modified herein by integrating COD and flow velocity, demonstrated the production of current by MFC operating under different conditions of flow. Calculation of current by MFC in a virtual fluid suggested that the flow surrounding the MFC varied with the configuration and affected the current production.

Investigation and optimization of a solar-assisted pumped thermal energy storage system with flat plate collectors

The objective of this work is the investigation of a solar-assisted pumped thermal energy storage system. The examined unit includes a solar field with flat plate collectors, a high-temperature heat pump, a latent storage system and an organic Rankine cycle. This system is fed by electricity from any renewable energy source (e.g., wind turbines or photovoltaic panels), and so the compressor of the heat pump is driven. The heat pump is fed with low-temperature heat from flat plate collectors, and it rejects heat of medium temperature to a latent storage system. The next step is exploiting the stored heat from an organic Rankine cycle for power production when there is a need for using electricity. The studied system is a “heat and power to power” system and can lead to high power recovery ratios. The analysis was conducted with a developed mathematical program in Engineering Equation Solver, and it was validated with numerical results from the literature. The optimum storage temperature has been found at 150 °C and the optimum temperature in the evaporator of the heat pump at 75 °C. In this case, the electricity recovery ratio (or power to power ratio) is found at 68.48%, the organic Rankine cycle efficiency at 18.45%, and the heat pump coefficient of performance at 3.704, while the collecting area is 150 m2. The use of a similar system without solar collectors but with the ambient as the heat source leads only to a 32.14% power recovery ratio. So, the specific gain of the used collecting area is 35.17 W/m2 which is an important amount of electricity. In the global optimum case, the simple payback period of the solar field investment is found to be at 7.8 years, which is a reasonable value and proves the financial viability of the examined idea. Moreover, this work proves that providing heat input of a relatively high temperature in the heat pump of the pumped thermal energy storage system is an excellent choice for recovering higher amounts of electricity.

EVALUATION OF GREENHOUSE GAS EMISSIONS FROM SOLID WASTE MANAGEMENT PRACTICES IN STATE CAPITALS OF NORTH EASTERN NIGERIA

Greenhouse gas (GHG) emissions due to solid waste management (SWM) techniques being practiced in the North eastern region of Nigeria are unaccounted for as such these emissions cannot be monitored or controlled. This research estimated GHG emissions into the atmosphere from the current SWM technique practiced in the region, GHG emissions from two different waste management techniques – open burning and incineration was also simulated. The research found that incineration with electricity recovery is the most suitable SWM process therefore suggested that the authorities and other stakeholders in the region should give it serious consideration.

A Comprehensive Method of Recovering Electricity Stealing Based on Data Mining

Aiming at the current situation that the current methods of recovering the stolen electricity often use manual analysis and estimation, which leads to unsatisfactory results, this paper proposes a comprehensive electricity recovery method based on data mining. First of all, it is determined for the stealing time and other relevant data. Then, for users who can calculate the correction coefficients, the correction coefficient method is used to analyze the electricity theft electricity, and the users who meet the requirements of the prediction algorithm are analyzed using the corresponding forecast algorithm time series or neural network. Finally, the remaining users use the calibrated capacity of the electric energy meter instead of the actual load to analyze the stolen electricity. Time series forecasting uses an improved ARIMA algorithm based on white noise to predict the stolen electricity. The neural network uses an improved BP neural network based on independent variables to predict the stolen electricity. The research results show that this method takes into account the characteristics of a single power-stealing user while taking into account the user’s periodicity. It can reasonably recover the electricity of power-stealing users and provides a new idea for power recovery.