CN104935075B - Distributed power supply access user bidirectional metering, monitoring and energy efficiency management system and distributed power supply access user bidirectional metering, monitoring and energy efficiency management method - Google Patents
Distributed power supply access user bidirectional metering, monitoring and energy efficiency management system and distributed power supply access user bidirectional metering, monitoring and energy efficiency management method Download PDFInfo
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Abstract
The present invention relates to the distributed power generation field, and aims to provide a distributed power supply access user bidirectional metering, monitoring and energy efficiency management system and a distributed power supply access user bidirectional metering, monitoring and energy efficiency management method. In the system, a processor module is connected with an energy storage charging/discharging control module, a load control module and a communication module separately and realizes the bidirectional data interaction with the communication module, and a metering and monitoring module is connected with the processor module and is used to realize the three-way bidirectional metering and the three-way monitoring; an energy storage device is connected with a power grid via an energy storage grid connected inverter, the energy storage charging/discharging control module is connected with the energy storage grid connected inverter, and the communication module is communicated with a power grid company electric energy acquisition system in a wired or wireless manner. By the system and method of the present invention, the energy efficiency management and control can be carried out real-timely according to the distributed power generation information and the electricity price information, and by considering the future and possible electricity selling price and energy storage charging/discharging efficiency factors of independent energy storage, the energy efficiency management and control has the practical significance and economic value.
Description
Technical field
The present invention relates to distributed power generation field, concretely, be related to a kind of distributed power source accessing user bidirectional measuring,
Monitoring and energy efficiency management system and method.
Background technology
With environmental problem domain, energy problem increasingly receives publicity, distributed power generation, especially renewable energy source distribution
Formula generation technology quickly grows, and becomes the prior development direction of various countries' energy resource supply.Traditional electrical network is collected by big power station
Middle generating, is used electrical energy transportation with each user of dispersion is assigned to by electrical network, is existed and is set network loss greatly, power transmission and distribution high cost
The problems such as.And regenerative resource is generally configured with that generated output density is little, intermittent and randomness big, using traditional centralized power generation
Mode needs to take substantial amounts of area, and because the intermittence for generating electricity causes the scheduling of electric energy and conveyer belt to carry out very big problem,
Situations such as Jing off-grid often occurs or abandons electricity occurs, i.e., the safety of electrical network is impacted, the utilization ratio to regenerative resource
Also it is not high, therefore regenerative resource is on a large scale using relatively more suitable large-scale distributed forms of electricity generation.At present countries in the world exist
Enter regenerative resource to concentrate after the power generation mode of power station, all widely popularize distributed power generation form.In user side adnexa root
Develop distributed power generation according to the form of regenerative resource, directly to customer power supply, need not move through transmission and disttrbution process, drop significantly
Low electrical energy transportation loss, and the reliability of power supply can be improved.
The user of the distributed power source of access possesses generating capacity so that flow of power bidirectional flow between user and electrical network
Dynamic, user continues to meet customer charge needs from electrical network power purchase when distributed power generation is not enough, little in low power consumption moment power consumption
When distributed power generation, user can be to electrical network sale of electricity, it is also possible to unnecessary electrical power storage is got up by energy-storage system, is dividing
Discharge during cloth generation deficiency and used for load, or electrical network is sold to when suitable.So there is user and
The electric energy settling problems of electrical network, need to be exchanged using the electric energy of bidirectional measuring method metering user and electrical network.Current each government is all
Regenerative resource distributed power generation is supported energetically, there is the subsidy policy of correlation, therefore regenerative resource distributed power generation needs
Individually accurate measurement is obtaining government subsidy.The configuration of access and energy-storage system additionally, due to distributed power source so that use
The generating at family, electricity consumption become more complicated, and how coordinating distributed power generation, energy storage, electricity consumption and sale of electricity and will being one has very much
The energy efficiency management problem of meaning, rational energy efficiency managing method can improve the income of user, reduce electric cost, and can be most
The utilization regenerative resource of bigization.
The content of the invention
The technical problem to be solved in the present invention be overcome in prior art in the case of distributed power source accessing user user with
The deficiency of the measurement problem, monitoring and energy efficiency management of electrical network realizing bidirectional electric energy flow, there is provided a kind of distributed power source accessing user is double
To metering, monitoring and energy efficiency management system and method.
To solve technical problem, the concrete solution of the present invention is as follows：
A kind of distributed power source accessing user metering, monitoring and energy efficiency management system, including processor module, metering are provided
With monitoring module, energy storage charge and discharge control module, load control module and communication module；Processor module is respectively connected to energy storage and fills
Control of discharge module, load control module and and communication module, and realize bidirectional data interaction with communication module；
Metering is connected to processor module with monitoring module, for realizing the bidirectional measuring on three tunnels and the monitoring on three tunnels；Wherein,
The bidirectional measuring on three tunnels refers to that the bidirectional electric energy to Distributed-generation equipment, energy storage device and load respectively between electrical network is counted
Amount；The monitoring of three tunnels refers to and the running status of Distributed-generation equipment, energy storage device and load is monitored；
Energy storage device is connected to electrical network by energy storage combining inverter, and energy storage charge and discharge control module is connected to energy storage parallel network reverse
Device, for controlling the charging operations or discharge operation of energy storage device；Energy storage charge and discharge control module can be according to processor module
The charging for sending still is discharged or standby command, realizes the control to energy storage device so as to be operated in corresponding charging, put
Electricity or holding state.
Load is divided into important load and general load, and load control module is cut when emergency and energy efficiency management need
The disconnected power supply to general load；Important load and general load are distinguished by user according to the importance of load itself, and will
Its differentiation foundation is arranged in load control module, the load control order that load control module sends according to processor module
Control can be powered or is powered off to general load.
Communication module is realized communicating by wired or wireless way and grid company electric energy collection system, for uploading electric energy
Information, acquisition Spot Price information, and by Spot Price information transmission to processor module.Communication module can be logical using 485
The various ways such as news, ethernet communication, the Spot Price that electric energy collection system sends in real-time reception grid company distribution system
User's metering, monitoring and the energy data of energy efficiency management system collection are sent to electrical network by information transmission to processor module
Electric energy collection system in company power distribution system.
In the present invention, the Distributed-generation equipment is：Photovoltaic power generation equipment, wind energy generating plant, fuel cell power generation
Any one in equipment or miniature gas generating equipment.
In the present invention, the energy storage device is：Various types of accumulator batteries or super capacitor group.
Invention further provides the distributed power source accessing user metering, monitoring and energy efficiency management based on aforementioned system
Method, specifically includes：Processor module carries out energy efficiency management according to the Spot Price information, energy data and monitoring data that obtain
Calculate, the charge and discharge control for realizing energy storage device is calculated and spatial load forecasting calculating：Discharge and recharge instruction is sent to into energy storage discharge and recharge
Control module, by it the transformation of energy storage device charging and discharging state is realized；Load control order is sent to into spatial load forecasting mould
Block, break-make control is carried out by it to general load.
The charge and discharge control of the energy storage device is calculated and referred to：Processor module is according to communication module from electrical network electric energy acquisition
System obtain Spot Price P, energy storage efficiency for charge-discharge η, distributed power generation rate for incorporation into the power network P2, energy storage rate for incorporation into the power network P3 and point
Cloth generated output W1, load power W2 carry out the charge and discharge control of energy storage device：
It is distributed when distributed power generation power, load power and electricity price information are met with following formula (1) and formula (2) simultaneously
Generating equipment charges to energy storage device, and otherwise energy storage device is in holding state, on the unnecessary electricity of Distributed-generation equipment is direct
Net sale of electricity；
W1 ＞ W2 (1)
P2 ＜ P3 × η (2)
When the low power consumption moment is in, current electricity prices and energy storage sale of electricity electricity price meet following formula (3), and energy storage device underfill
When electric, energy storage device is charged control from electrical network power purchase；
P ＜ P3 × η (3)
When distributed power generation power is less than load electric power, energy storage device dump energy>10%, and meet following formula (4)
When, energy storage device carries out electric discharge for load electricity consumption, otherwise directly from electrical network power purchase for load electricity consumption：
P ＞ P3 × η (4).
The spatial load forecasting is calculated and referred to：Processor module refers to electricity price P1, and communication according to the spatial load forecasting for arranging
Module is judged from Spot Price P that electrical network electric energy collection system is obtained：As P1 >=P, open general load and power；Work as P1
<During P, close general load and power；Above-mentioned judged result is sent to load control module by processor module, controls general load
Power supply.
In the present invention, the distributed power generation amount of metering is used to obtain government finance subsidy, and the energy storage of metering is discharged for not
Carry out possible energy storage subsidy, the user of metering and electrical network bidirectional electric energy are used for user and electrical network carries out electricity price clearing.Three tunnels it is double
Realize that this is prior art by the signals collecting of sensor or measurement apparatus and transmission with the monitoring on three tunnels to metering.Three
Road monitoring includes distributed power generation state, energy storage state, load condition.Monitoring to distributed power generation includes real-time wattful power
Rate, reactive power, voltage, frequency, distributed power generation state etc., the monitoring to energy storage includes dump energy, energy storage state, charge and discharge
Electrical power, voltage etc.；Monitoring to load includes load electricity consumption active power, reactive power, voltage etc..Metering and monitoring module
The metering of collection and the data of monitoring are sent to processor module.
Compared with prior art, the beneficial effects of the present invention is：
Traditional energy efficiency management comprising distributed power source and energy-storage system is all based on fixing Price Mechanisms, does not both examine
Consider the efficiency for charge-discharge problem of Spot Price situation under future electrical energy market environment and energy-storage battery, also do not account for item electricity
The problems such as situation of net sale of electricity and the subsidy policy of possible energy storage electric discharge.
Using the system and method for the present invention, in real time efficiency can be carried out according to distributed power generation information and electricity price information
Management control, and consider the sale of electricity price and energy storage efficiency for charge-discharge factor of following possible energy storage independence so that efficiency pipe
Reason control is with practical significance and economic worth.
Description of the drawings
Fig. 1 is distributed power source accessing user metering, monitoring and energy efficiency management system schematic diagram.
Fig. 2 is metering, monitors and energy efficiency management system functional block diagram.
Specific embodiment
The preferred embodiments of the present invention are illustrated below in conjunction with accompanying drawing, it will be appreciated that the preferred reality described by this time
Apply example and be merely to illustrate and explain the present invention, be not intended to limit the present invention.
Firstly the need of explanation, the present invention relates to industrial control technology, is that computer technology controls skill in grid equipment
One kind application in art field.During the realization of the present invention, the application of multiple software function modules can be related to.Applicant recognizes
For, such as read over application documents, accurate understanding the present invention realize principle and goal of the invention after, with reference to existing known
In the case of technology, those skilled in the art can use completely the software programming technical ability of its grasp to realize the present invention.It is aforementioned soft
Part functional module includes but is not limited to：Metering and monitoring module, energy storage charge and discharge control module, load control module etc., all
Patent application file is referred to category this category, applicant will not enumerate.The concrete thought of the present invention is as follows：
Specific embodiment of the invention is as shown in Figures 1 and 2.Distributed power source accessing user metering, monitoring and energy
Effect management system mainly using the user that formula power supply is distributed with access, gathers the energy data of multichannel, and according to Spot Price
Carry out energy efficiency management.
Distributed power source accessing user metering, monitoring and energy efficiency management system, including processor module, metering and monitoring mould
Block, energy storage charge and discharge control module, load control module and communication module.Concrete annexation or signal of telecommunication transitive relation are：
Processor module be respectively connected to energy storage charge and discharge control module, load control module and and communication module, and with communication module reality
Existing bidirectional data interaction；Metering is connected to processor module with monitoring module, for realizing the bidirectional measuring on three tunnels and the prison on three tunnels
Control；Energy storage device is connected to electrical network by energy storage combining inverter, and energy storage charge and discharge control module is connected to energy storage combining inverter；It is logical
News module is realized communicating by wired or wireless way and grid company electric energy collection system.Wherein：
Metering realizes the bidirectional measuring on three tunnels and the monitoring on three tunnels with monitoring module, three tunnels measure include distributed power generation,
Energy storage electric discharge, user and electrical network bidirectional electric energy, three tunnels monitoring includes distributed power generation state, energy storage state, load condition, measures
Processor module is sent to the data of monitoring；Energy storage charge and discharge control module is connected to energy storage combining inverter, controls energy storage
System is charged operation or discharge operation；Load is divided into important load and general load by load control module, tight
Load control module can cut off the power supply of general load in the case of anxious situation and energy efficiency management needs；Communication module connects electrical network
Company's electric energy collection system, uploads energy information, and obtains Spot Price information, then by Spot Price information transmission to process
Device module；Processor module is carried out according to Spot Price information, metering and the energy data and monitoring data of monitoring module transmission
Energy efficiency management is calculated, and the charge and discharge control for realizing energy storage device is calculated and spatial load forecasting calculating, and energy storage discharge and recharge instruction is sent out
Energy storage charge and discharge control module is sent to, the transformation of energy storage device charging and discharging state is realized, load control order is sent
Load control module, to general load break-make control is carried out.
Energy storage charge and discharge control module can still discharge or standby command according to the charging that processor module sends,
Realize the control of energy-storage system so as to be operated in corresponding charging, electric discharge or holding state.
Customer charge is divided into important load and general load by load control module according to the standard for arranging, according to processor
The load control order that module sends can be powered or be powered off control to general load.
Communication module can be using the various ways such as 485 communications, ethernet communication, real-time reception grid company distribution system
User is measured, is monitored and energy efficiency management by the Spot Price information transmission that middle electric energy collection system sends to processor module
The energy data of system acquisition is sent to electric energy collection system in grid company distribution system.
Distributed-generation equipment can be photovoltaic power generation equipment, wind energy generating plant, fuel cell power plant or miniature
Any one in fuel gas generation equipment.Energy storage device can be various types of accumulator batteries or super capacitor group.
Distributed power source accessing user energy efficiency managing method is operated in processor module in the form of embedded software, the party
Method includes that spatial load forecasting is calculated and energy storage control calculates two parts again.
1st, spatial load forecasting is calculated：Customer charge control according to arranging refers to electricity price P1, and communication module from electrical network electricity
Can acquisition system obtain Spot Price P judged, if general load is opened during P1 >=P powered, work as P1<One is closed during P
As load power, above-mentioned judged result is sent to load control module by processor module, controls the power supply of general load.
2nd, energy storage control is calculated：Spot Price P, the energy storage charge and discharge obtained from electrical network electric energy collection system according to communication module
Electrical efficiency η, distributed power generation rate for incorporation into the power network P2, energy storage rate for incorporation into the power network P3 and distributed power generation power W1, load power W2 are entered
The charge and discharge control of row energy storage device.
It is distributed when distributed power generation power, load power and electricity price information are met with following formula (1) and formula (2) simultaneously
Generating equipment charges to energy storage device, makes energy storage device be in charged state；Otherwise, energy storage device is in holding state, distribution
The unnecessary electricity of formula generating equipment is directly surfed the Net sale of electricity.
W1 ＞ W2 (1)
P2 ＜ P3 × η (2)
Citing：If current distributed power generation power W1 is more than load power W2, distributed power generation rate for incorporation into the power network P2 is
0.35 yuan/degree, energy storage rate for incorporation into the power network P3 is 0.45 yuan/degree, and energy storage device efficiency for charge-discharge η is 0.9, then meet P2=0.35 ＜
P3 × η=0.45 × 0.9=0.405, the non-energy storage of the unnecessary electricity of Distributed-generation equipment is charged, and energy storage device is operated in charging mould
Formula；If now distributed power generation rate for incorporation into the power network P2 is 0.45, or energy storage efficiency only 0.8 is unsatisfactory for formula (2), point
Cloth generating equipment is directly surfed the Net sale of electricity, and energy-storage system is operated in standby mode.
When the low power consumption moment is in, current electricity prices and energy storage device sale of electricity electricity price meet following formula (3), and energy storage device is not
When fully charged, energy storage device is charged control from electrical network power purchase.
P ＜ P3 × η (3)
Citing：Electricity price is relatively low during low power consumption, P be 0.25 yuan/degree, meet above-mentioned formula (3) P=0.25 ＜ P3 × η=
0.45 × 0.9=0.405, then charge from electrical network power purchase to energy storage device, and energy storage device is in charge mode, until energy storage
Equipment is full of；And it is higher in peak times of power consumption electricity price, not from electricity if being unsatisfactory for upper formula (3) when Spot Price P is 0.55 yuan
Net purchase supplies electricity to energy storage device charging.
When Distributed-generation equipment is less than load electric power, energy storage device dump energy>10%, and meet following formula (4)
When, energy storage device carries out electric discharge for load electricity consumption, otherwise directly from electrical network power purchase for load electricity consumption.
P ＞ P3 × η
Citing：When distributed power generation power is less than load electric power, if now Spot Price P from electrical network power purchase is
0.42 yuan/degree, energy storage device sale of electricity electricity price P3 is 045 yuan/degree, and energy storage efficiency for charge-discharge η is 0.9, then meet above-mentioned formula (4)
P=0.42 ＞ P3 × η=0.45 × 0.9=0.405, are discharged by energy storage device and give load electricity consumption, otherwise directly from electrical network power purchase
To meet workload demand.If Distributed-generation equipment and energy storage device electric discharge are comprehensively still unsatisfactory for load, remaining not enough
Part is needed for from electrical network power purchase.
In sum, the present invention includes distributed power source accessing user metering, monitoring and energy efficiency management system and method, adopts
In real time energy efficiency management control can be carried out according to distributed power generation information and electricity price information with the mode of the present invention, and be considered
The sale of electricity price and energy storage efficiency for charge-discharge factor of following possible energy storage independence so that energy efficiency management control is with actual meaning
Justice and economic worth.
Finally it should be noted that：Above specific embodiment is only used for above example, only to illustrate the present invention's
Technical scheme rather than it is limited, although being described in detail to the present invention with reference to above-mentioned embodiment, affiliated neck
The those of ordinary skill in domain should be understood：Still the specific embodiment of the present invention can be modified or equivalent,
And any modification or equivalent without departing from spirit and scope of the invention, it all should cover the claim model in the present invention
In the middle of enclosing.Sale of electricity price P2 of such as photovoltaic, sale of electricity price P3 of energy storage may not be fixed value, and current Spot Price class
Seemingly, it is also possible to make real-time change, common rate for incorporation into the power network can also be adopted when not putting into effect energy storage Independent Price as energy storage
Rate for incorporation into the power network is used, but still can carry out energy efficiency management control using said method.
Claims (2)
1. distributed power source accessing user measures, monitors and energy efficiency managing method, it is characterised in that the method is based on following systems
What system was realized：The system includes processor module, metering and monitoring module, energy storage charge and discharge control module, load control module
And communication module；Processor module be respectively connected to energy storage charge and discharge control module, load control module and and communication module, and with
Communication module realizes bidirectional data interaction；
Metering is connected to processor module with monitoring module, for realizing the bidirectional measuring on three tunnels and the monitoring on three tunnels；Wherein, three tunnel
Bidirectional measuring refer to that the bidirectional electric energy to Distributed-generation equipment, energy storage device and load respectively between electrical network is measured；
The monitoring of three tunnels refers to and the running status of Distributed-generation equipment, energy storage device and load is monitored；
Energy storage device is connected to electrical network by energy storage combining inverter, and energy storage charge and discharge control module is connected to energy storage combining inverter,
For controlling the charging operations or discharge operation of energy storage device；
Load is divided into important load and general load, and load control module cuts off right when emergency and energy efficiency management need
The power supply of general load；
Communication module is realized communicating by wired or wireless way and grid company electric energy collection system, for uploading electric energy letter
Breath, acquisition Spot Price information, and by Spot Price information transmission to processor module；
The Distributed-generation equipment is：Photovoltaic power generation equipment, wind energy generating plant, fuel cell power plant or miniature gas
Any one in generating equipment；The energy storage device is：Accumulator battery or super capacitor group；
The management method is specifically included：Processor module enters according to the Spot Price information, energy data and monitoring data that obtain
Row energy efficiency management is calculated, and the charge and discharge control for realizing energy storage device is calculated and spatial load forecasting calculating：Discharge and recharge instruction is sent to
Energy storage charge and discharge control module, by it the transformation of energy storage device charging and discharging state is realized；Load control order is sent to
Load control module, break-make control is carried out by it to general load；
The charge and discharge control of the energy storage device is calculated and referred to：Processor module is according to communication module from electrical network electric energy collection system
Spot Price P of acquisition, energy storage efficiency for charge-discharge η, distributed power generation rate for incorporation into the power network P2, energy storage rate for incorporation into the power network P3 and distributed
Generated output W1, load power W2 carry out the charge and discharge control of energy storage device：
When distributed power generation power, load power and electricity price information are met with following formula (1) and formula (2) simultaneously, distributed power generation
Equipment charges to energy storage device, and otherwise energy storage device is in holding state, and the unnecessary electricity of Distributed-generation equipment directly sell by online
Electricity；
W1 ＞ W2 (1)
P2 ＜ P3 × η (2)
When the low power consumption moment is in, current electricity prices and energy storage sale of electricity electricity price meet following formula (3), and energy storage device underfill electricity
When, energy storage device is charged control from electrical network power purchase；
P ＜ P3 × η (3)
When distributed power generation power is less than load electric power, energy storage device dump energy>10%, and when meeting following formula (4), storage
Energy equipment carries out electric discharge for load electricity consumption, otherwise directly from electrical network power purchase for load electricity consumption：
P ＞ P3 × η (4).
2. method according to claim 1, it is characterised in that the spatial load forecasting is calculated and referred to：Processor module according to
The spatial load forecasting of setting refers to electricity price P1, and communication module is sentenced from Spot Price P that electrical network electric energy collection system is obtained
It is disconnected：As P1 >=P, open general load and power；Work as P1<During P, close general load and power；Processor module is by above-mentioned judgement
As a result load control module is sent to, the power supply of general load is controlled.
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| CN201510153433.5A CN104935075B (en) | 2015-04-01 | 2015-04-01 | Distributed power supply access user bidirectional metering, monitoring and energy efficiency management system and distributed power supply access user bidirectional metering, monitoring and energy efficiency management method |
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| CN105552918B (en) * | 2016-02-23 | 2018-03-13 | 广东顺德中山大学卡内基梅隆大学国际联合研究院 | Power distribution system under micro-capacitance sensor isolated island environment |
| CN107681675A (en) * | 2017-09-27 | 2018-02-09 | 赫普科技发展（北京）有限公司 | Block chain electricity transaction peak-frequency regulation system based on distributed electric power storage facility |
| CN108131843A (en) * | 2017-11-30 | 2018-06-08 | 赫普科技发展（北京）有限公司 | Peak-frequency regulation system based on distributed electrical accumulation of heat hydrophone |
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| US20080121525A1 (en) * | 2005-10-11 | 2008-05-29 | Doland George J | Renewable Power Controller for Hydrogen Production |
| CN102361328B (en) * | 2011-10-25 | 2014-04-02 | 中国科学技术大学 | Wind and light complement distributed micro-grid system for comprehensively utilizing commercial power |
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