CN105931140A - Region multi-microgrid comprehensive evaluation method - Google Patents

Abstract

The invention relates to a region multi-microgrid comprehensive evaluation method. The method comprises the following steps: inputting distributive power supply configuration data and load condition data of each microgrid within a region multi-microgrid; sampling demands of users for cooling load and thermal load within the region multi-microgrid; obtaining region multi-microgrid source-load indexes in a region multi-microgrid comprehensive evaluation index; establishing a distributive power supply model and sampling distributive power supply output data and operation data of a cooling, heating and power triple supply device within the region multi-microgrid; calculating a region multi-microgrid multi-energy utilization index, a region multi-microgrid flexibility index and a region multi-microgrid interactivity index in the region multi-microgrid comprehensive evaluation index; conducting statistics on indexes of microgrid annual islanded operation times and islanded operation lasting times, etc.; obtaining a region multi-microgrid vulnerability index and a region multi-microgrid anti-vulnerablity index. According to the invention, the method can better evaluate technical properties under a region multi-microgrid, and provide systematic quantification indexes for the operation and the like of the region multi-microgrid.

Description

A kind of region many microgrids integrated evaluating method

Technical field

The invention belongs to microgrid field, relate to a kind of microgrid evaluation methodology.

Background technology

Along with Distributed Power Generation develops, microgrid has obtained broad development as a kind of new distributed power source type of organization.Closely Nian Lai, along with the propelling of electric Power Reform and electricity consumption enterprise are for the diversified development trend of need for electricity, the many microgrids in region are because energy Enough meet the many demands of user and be increasingly becoming study hotspot.

Relative to the single microgrid in region, the many microgrids in region have different operation characteristics.Under the conditions of the many microgrids in region, due to each Distributed power source configuration and the difference of need for electricity in single microgrid, it is thus possible to there is the flowing of energy between microgrid.Meanwhile, Energy management strategies between the many microgrids in region shows different features under the conditions of single microgrid.In order to characterize the many microgrids of quantization areas Under the conditions of combination property, it is necessary to set up the quantizating index describing region many microgrids combination property.For this reason, it may be necessary to for region Feature under many microgrids scene is proposed for the comprehensive assessment index of the many microgrids in region, and builds region many microgrids overall evaluation system.

Summary of the invention

The operation characteristic that it is an object of the invention to the many microgrids of calmodulin binding domain CaM proposes the various dimensions of some description regions many microgrids combination property The index of performance, and then provide a kind of region many microgrids integrated evaluating method, under the conditions of the preferably many microgrids of assessment area Technical performance, provides the quantizating index of system for the operation etc. of the many microgrids in region.The technical solution used in the present invention is:

A kind of region many microgrids integrated evaluating method, this evaluation methodology is first many from region many microgrid energy interactivity index, region Microgrid motility index, region many microgrids vulnerability and anti-vulnerability inder, the many microgrids of region many microgrids source-lotus index and region are many Five aspect quantization areas many microgrids comprehensive assessment index of index can be utilized, comprise:

(1) region many microgrid energy interactivity index

1) the many microgrids in region export electricity MAOE every year, and for zoning, many microgrids are every year to the electricity summation of external electrical network output:

$MAOE={\∫}_0^T\underset{i=1}{\overset{n}{\Σ}}\left(\right|p_i\left(t\right)|-p_i(t\left)\right)/2dt.---\left(1\right)$

In formula: p_iT () is the power that t flows into i-th microgrid；N is microgrid number in the many micro-grid systems in region, and T is institute The total period calculated；

2) region many microgrids annual average power generation MAGE, in the many microgrids in zoning, all distributed power sources of each microgrid are average annual Gross generation:

$MAGE=\underset{i=1}{\overset{n}{\Σ}}{\∫}_0^T{p}_{gen,i}\left(t\right)dt.---\left(2\right)$

In formula: p_gen,iT () is the generated output of i-th microgrid t；

3) the many microgrids in region output electric energy is than MEOR, the many micro-grid systems in many micro-grid systems output territory, electric energy occupied area for zoning The ratio of distributed power source gross generation:

MEOR=MAOE/MAGE (3)

4) region many microgrids interconnection average annual electric energy exchange capacity MTAE, is used for calculating many average annual flow-thru electrodes of micro-grid system interconnection Amount:

$MTAE={\∫}_0^T{P}_{i\_exchange}\left(t\right)dt---\left(4\right)$

In formula: P_{i_exchange}(t) be in microgrid i-th article of interconnection at the average flowing-through power of t little period；

5) the average annual electric energy of region many microgrids interconnection total exchange capacity MAEE, is used for calculating many micro-grid systems interconnection and circulates every year electricity:

$MAEE=\underset{i=1}{\overset{m}{\Σ}}MTAE---\left(5\right)$

In formula: m is the bar number of interconnection in the many microgrids in region；

6) region many microgrids electric energy exchange ratio MEER, flows through the ratio of territory, electricity occupied area many microgrids total electric load for calculating interconnection:

$MEER=\frac{MAEE}{\underset{j=1}{\overset{n}{\Σ}}{\∫}_0^{8760}{p}_{load,j}\left(t\right)dt}---\left(6\right)$

In formula: p_load,jT () is the average electric load power of region many micro-grid systems t little period jth microgrid；

7) region many microgrids electric energy exchange rate METOR, flows through electricity account for the ratio of many microgrids all units production capacity for calculating interconnection Example:

$METOR=\frac{MAEE}{MAGE}---\left(7\right)$

8) region many microgrids electric energy abundant intensity MPAI, for describing the abundant intensity of electric energy in the many micro-grid systems in region:

$MPAI=\frac{MAGE}{\underset{j=1}{\overset{n}{\Σ}}{\∫}_0^{8760}{p}_{load,j}\left(t\right)dt}---\left(8\right)$

In formula: p_load,jT () is the average electric load power of region many micro-grid systems t little period jth microgrid；

9) microgrid energy local use rate ELCR, the local use level of distributed power source generated energy in calculating microgrid:

$ELCR=1-{\∫}_0^T\left(\right|p_j\left(t\right)|-p_j(t\left)\right)dt/2\·{\∫}_0^T{p}_{gen,j}\left(t\right)dt.---\left(9\right)$

10) region many microgrids energy local use rate MELCR, this index is for the generating of zoning many micro-grid systems distributed power source The ratio of amount local use:

$MELCR=(\underset{j=1}{\overset{n}{\Σ}}{\mathrm{ELCR}}_j\·{\∫}_0^T{p}_{gen,j}(t\left)dt\right)/\underset{i=1}{\overset{n}{\Σ}}{\∫}_0^T{p}_{gen,j}\left(t\right)dt.---\left(10\right)$

In formula: ELCR_jELCR index for jth microgrid；

11) microgrid energy local use time rate ECTR, is used for calculating micro-grid distributed generation and exerts oneself and disappeared by microgrid internal loading completely The time scale received:

$ECTR=\left({\∫}_0^{T}f\left(p_{load,j}\left(t\right)-p_{gen,j}\left(t\right)\right)dt\right)/T.---\left(11\right)$

In formula: function f (t) is defined as follows:

$f\left(t\right)=f\left(t\right)=\left\{\begin{array}{cc}1& t>0\\ 0& t\≤0\end{array}\right..---\left(12\right)$

12) region many microgrids energy local use time rate MECTR, be used for defining region many micro-grid systems distributed power source exert oneself by The time scale of on-site elimination completely:

$MECTR={\∫}_0^T\left(f\right(\underset{j=1}{\overset{n}{\Σ}}{p}_{load,j}\left(t\right)-\underset{j=1}{\overset{n}{\Σ}}{p}_{gen,j}\left(t\right))dt/T.---\left(13\right)$

(2) region many microgrids motility index

1) region many microgrids mean state transition response time MORT, be used for describing the many micro-grid systems in region grid-connected-island state turns Change year average response time:

$MORT=\frac{\underset{i=1}{\overset{X}{\Σ}}{T}_{i\_state}\left(t\right)}{X}---\left(14\right)$

In formula: T_{i_state}T () is the average response time of i & lt State Transferring；X is year state conversion frequency；

2) the many piconet islands in region run time scale MIOTR, be used for describing the many micro-grid systems in the region average annual islet operation time with The ratio of total time in year:

$MIOTR=\frac{\underset{i=1}{\overset{Y}{\Σ}}{T}_{i\_islanded}}{8760}---\left(15\right)$

In formula: T_{i_islanded}For the i & lt islet operation persistent period；Y is year isolated island number of times；

3) region many piconet islands success rate MISR, is used for describing the many micro-grid systems in region and is switched to islet operation by being incorporated into the power networks Success rate；

$MISR=\frac{N_{success}}{N_{total}}---\left(16\right)$

In formula: N_success is State Transferring number of success；N_totalFor State Transferring total degree；

4) region many piconet islands service ability MIOA, is used for describing region many micro-grid systems islet operation for system internal loading Satisfaction degree:

$MIOA={\∫}_0^{T}f(\underset{j=1}{\overset{n}{\Σ}}{p}_{gen,j}\left(t\right)-\underset{j=1}{\overset{n}{\Σ}}{p}_{load,j}\left(t\right))/T.---\left(17\right)$

In formula: shown in the implication of f (t) function such as formula (12)；

(3) region many microgrids vulnerability and anti-vulnerability inder

1) isolated island longest run time MIMD, the longest run time under the conditions of describing region many micro-grid systems isolated island:

MIMD=max (T_{i_islanded}) (19)

2) single microgrid fault rate MFR, for describing the probability of malfunction of single microgrid:

$MFR=\frac{\underset{i=1}{\overset{nt}{\Σ}}{T}_i}{8760}---\left(20\right)$

In formula: T_iFor the trouble duration of i & lt fault in microgrid assessment year；Nt assessment year internal fault number of times；

3) region many micro-grid systems fault rate MSFR, for describing the probability of malfunction of the many micro-grid systems in region:

$MSFR=\frac{\underset{i=1}{\overset{mt}{\Σ}}{T}_{m\_i}}{8760}---\left(21\right)$

In formula: T_{m_i}For the trouble duration of i & lt fault in the many micro-grid systems in region assessment year；Mt assessment year internal fault Number of times；

(4) region many microgrids source-lotus index

1) many microgrids total load power MTL, for zoning many microgrids total load power:

MTL=Σ P_{e_load}+ΣP_{c_load}+ΣP_{h_load} (23)

In formula: P_{e_load}、P_{c_load}、P_{h_load}Average annual electric load, refrigeration duty and thermic load in being respectively the many microgrids in region；

2) region total load power RTLP, total load power in many micro-grid systems region, zoning:

RTLP=Σ P_{e_load_total}+ΣP_{c_load_total}+ΣP_{h_load_total} (24)

In formula: P_{e_load_total}、P_{c_load_total}、P_{h_load_total}Respectively electric load, refrigeration duty and thermic load in many microgrids region General power；

3) many microgrids load in region is powered rate MLR, for calculating the ratio of territory, the load occupied area total load that many microgrids are contained:

$MLR=\frac{MTL}{RTLP}---\left(25\right)$

4) many microgrids total power generating capacity MTIC, for zoning many micro-grid systems total installation of generating capacity:

MTIC=Σ P_ec (26)

In formula: P_ecPower for all microgrids total rated power of unit；

5) many microgrids capacity-load ratio MLCR, total load and the ratio of total installation of generating capacity in calculating many micro-grid systems；

$MLCR=\frac{MTL}{MTIC}---\left(27\right)$

In formula: the implication of MTL, MTIC is as indicated above；

6) system total load amount MSTL, the total load level of all microgrids in the many micro-grid systems in zoning；Its expression formula is:

$MSTL=\underset{n=1}{\overset{N}{\Σ}}{\∫}_0^T{P}_{load,n}\left(t\right)dt---\left(28\right)$

In formula: N is microgrid number in the many micro-grid systems in region；T is year hourage, usual value 8760；P_load,nT () is microgrid The average load power of t in n；

7) system core workload demand MSCLD (kW), the critical load of all microgrids in the many micro-grid systems in zoning Electricity consumption level；Its expression formula is:

$MSCLD=\underset{n=1}{\overset{N}{\Σ}}{\∫}_0^T{P}_{c\_load,n}\left(t\right)dt---\left(29\right)$

In formula: N is microgrid number in the many micro-grid systems in region；T is year hourage, usual value 8760；P_{c_load,n}T () is microgrid The average load power of the critical load of t in n；

8) system non-key workload demand MSNLD (kW), the non-key load of all microgrids in the many micro-grid systems in zoning Electricity consumption level；Its expression formula is:

$MSNLD=\underset{n=1}{\overset{N}{\Σ}}{\∫}_0^T{P}_{nc\_load,n}\left(t\right)dt---\left(30\right)$

In formula: N is microgrid number in the many micro-grid systems in region；T is year hourage, usual value 8760；P_{nc_load,n}T () is micro- The average load power of the non-key load of t in net n；

9) system gross generation MSTEG (kWh): this index reflects the generating equipment such as distributed power source in the many micro-grid systems in region Year gross generation；Its expression formula is:

$MSTEG=\underset{n=1}{\overset{N}{\Σ}}{\∫}_0^T{P}_{gen,n}\left(t\right)dt---\left(31\right)$

In formula: N is microgrid number in the many micro-grid systems in region；T is year hourage, usual value 8760；P_gen,nT () is microgrid n The average generated output of middle t；

10) accounting of critical load in system core load ratio MSCLL (100%): this index reflects the many micro-grid systems in region； Its expression formula is:

$MSCLL=\frac{\underset{n=1}{\overset{N}{\Σ}}{\∫}_0^T{P}_{c\_load,n}\left(t\right)dt}{MSTL}---\left(32\right)$

In formula: N is microgrid number in the many micro-grid systems in region；T is year hourage, usual value 8760；P_{c_load,n}T () is microgrid The critical load mean power of t in n；

(5) many microgrids multipotency in region utilizes index

1) region many microgrids multipotency number of types MMT, the energy source type sum that user utilizes in describing microgrid to be assessed:

MMT=me (33)

In formula: polymorphic type energy quantity in the microgrid of me region；

2) region many microgrids electricity/heat demand is than METR, the average annual electric load of user and the ratio of thermic load in the many microgrids of assessment area Example:

$METR={\∫}_0^T\frac{\underset{j=1}{\overset{n}{\Σ}}{p}_{load,j}\left(t\right)}{\underset{j=1}{\overset{n}{\Σ}}(q_{c,j}\left(t\right)+q_{h,j}\left(t\right))}dt---\left(34\right)$

In formula: p_load,jT () is the electric load power of t jth microgrid user；q_c,j(t),q_h,jT () is respectively t jth The refrigeration of individual microgrid user, the power of heat load；

3) microgrid electricity/hot charging machine capacity ratio METCR, the ratio of electricity/hot installed capacity in assessment area microgrid:

$METCR=\frac{{\mathrm{\ΣP}}_{ec}}{{\mathrm{\ΣP}}_{tc}}---\left(35\right)$

In formula: P_ecPower for all microgrids total rated power of unit；P_tcRated power for all thermal power plant unit；

4) region many microgrids power supplying efficiency (Multi-Microgrids Power Efficiency；MPE)；This index is used for assessing The efficiency that the many micro-grid systems in region are powered；

5) region many microgrids heating efficiency MTE, for the efficiency of assessment area many micro-grid systems heat supply:

In formula: q_c,jT () is region many microgrids interior-heat load power；

6) region many microgrids cooling efficiency MCE, for the efficiency of assessment area many micro-grid systems cooling:

In formula: q_h,jT () is refrigeration duty power in the many microgrids in region；

7) microgrid entirety energy supply efficiency MOEE, overall efficiency of energy utilization hot and cold and electric in assessment area microgrid:

$MOEE=\frac{MTL}{{\∫}_0^{8760}{f}_m\left(t\right)+e_{grid}\left(t\right)/\mathrm{\η}}dt---\left(39\right)$

In formula: f_mT () is the wear rate of t natural gas；Unit is kW；e_gridT () is the t electric work from electrical network power purchase Rate, unit is kW；η is the bulk supply efficiency of electrical network；

8) the many microgrids in region are powered carbon emission amount MCEUP, for describing region many micro-grid systems power consumption and carbon emission amount Ratio；

9) region many microgrids heat supply carbon emission amount MCEUH, for describing the ratio of region many micro-grid systems heating load and carbon emission amount；

10) region many microgrids cooling carbon emission amount MCEUH, for describing the ratio of region many micro-grid systems semen donors and carbon emission amount；

11) region many microgrids unit energy consumption carbon emission amount MCEUE, is used for describing region many micro-grid systems unit energy consumption and carbon emission amount Ratio；

$MCEUE={\∫}_{t=0}^{8760}\frac{{\mathrm{\μ}}_f\·f_m\left(t\right)+{\mathrm{\μ}}_e{e}_{grid}\left(t\right)}{\underset{j=1}{\overset{n}{\Σ}}{q}_{c,j}\left(t\right)+q_{h,j}\left(t\right)+p_{load,j}\left(t\right)}dt---\left(43\right)$

In formula: μ_fFor the carbon emission amount of unit natural gas, unit g/kWh；μ_eFor electrical network unit of electrical energy carbon emission amount, unit g/kWh；

Evaluation procedure is as follows:

One, in the many microgrids of input area, in each microgrid, distributed power source configures data and load condition data；Sampling region is the most micro- In net, user is for the demand of hot and cold load, specifies opening up of the distribution at communication relationship and many microgrids place, region between the many microgrids in region Flutter structure and load condition；

Two, region many microgrids source-lotus index in the many microgrids comprehensive assessment index of region is obtained by above-mentioned data；

Set up distributed power source in the many microgrids of distributed electrical source model region of sampling and go out force data and cold, heat and electricity triple supply sets Standby service data；Set up microgrid equivalent model under the conditions of the many microgrids in region；Obtained between each microgrid by Load flow calculation Go out force data；

Three, in zoning many microgrids index, region many microgrids multipotency utilizes index and region many microgrids motility index and region Many microgrid energy interactivity index；

Four, the index such as piconet island number of run, islet operation persistent period in statistical estimation year；In conjunction with load data and district Distributed power source and the configuration capacity of energy storage in the many microgrids in territory each microgrid interior, obtain region many microgrids vulnerability and refer to anti-vulnerability Mark；

Five, this from region many microgrid energy interactivity index, region many microgrids motility index, region many microgrids vulnerability with anti- Vulnerability inder, region many microgrids source-lotus index and region many microgrids multipotency utilize five aspects of index to obtain the many microgrids of assessment area The index of combination property.

Utilize region many microgrids comprehensive assessment index that the present invention proposes, it is possible to from region many microgrid energy interactivity index, region Many microgrids motility index, region many microgrids vulnerability and anti-vulnerability inder, the many microgrids of region many microgrids source-lotus index and region Multipotency utilizes five aspect quantization areas many microgrids performances of index.

Accompanying drawing explanation

Fig. 1 region many microgrids synthetic performance evaluation Index Establishment and quantization flow

Detailed description of the invention

The technical solution used in the present invention is: from region many microgrid energy interactivity index, region many microgrids motility index, district Territory many microgrids vulnerability utilizes five aspects of index with anti-vulnerability inder, region many microgrids source-lotus index and region many microgrids multipotency Proposing description region many microgrids comprehensive assessment index, this index comprises with lower part:

(1) region many microgrid energy interactivity index

1) the many microgrids in region export electricity (Multi-Microgrids Annual Output Energy every year；MAOE)；This refers to The electricity summation that mark exports to external electrical network every year for the many microgrids in zoning.

$MAOE={\∫}_0^T\underset{i=1}{\overset{n}{\Σ}}\left(\right|p_i\left(t\right)|-p_i(t\left)\right)/2dt.---\left(1\right)$

In formula: p_iT () is the power that t flows into i-th microgrid；N is the number of microgrid.

2) region many microgrids annual average power generation (Multi-Microgrids Annual Generated Energy；MAGE)；Should Index is the average annual gross generation of all distributed power sources of each microgrid in the many microgrids in zoning.

$MAGE=\underset{i=1}{\overset{n}{\Σ}}{\∫}_0^T{p}_{gen,i}\left(t\right)dt.---\left(2\right)$

In formula: p_gen,iT () is the generated output of i-th microgrid t；N is microgrid number in the many micro-grid systems in region.

3) the many microgrids in region output electric energy ratio (microgrid electric energy output rating) (Multi-Microgrids Energy Output Ratio； MEOR)；This index is for the ratio of the many micro-grid systems in zoning output territory, electric energy occupied area many micro-grid systems distributed power source gross generation Example.

$MEOR=MAOE/MAGE={\∫}_0^T\underset{i=1}{\overset{n}{\Σ}}\left(\right|p_i\left(t\right)|-p_i(t\left)\right)/2dt/\underset{i=1}{\overset{n}{\Σ}}{\∫}_0^T{p}_{gen,j}\left(t\right)dt.---\left(3\right)$

In formula: p_iT () is the power that t flows into i-th microgrid；p_gen,iT () is the generated output of i-th microgrid t； N is microgrid number in the many micro-grid systems in region.

4) region many microgrids interconnection average annual electric energy exchange capacity (Multi-microgrids Tie-line Annual Exchange Energy；MTAE)；This index is used for calculating many micro-grid system interconnections and circulates every year electricity.

$MTAE={\∫}_0^T{P}_{i\_exchange}\left(t\right)dt---\left(4\right)$

In formula: P_{i_exchange}(t) be in microgrid i-th article of interconnection at the average flowing-through power of t little period.

5) the total exchange capacity of the average annual electric energy of region many microgrids interconnection (Multi-microgrids Annual Exchange Energy； MAEE)；This index is used for calculating many micro-grid systems interconnection and circulates every year electricity.

$MAEE=\underset{i=1}{\overset{m}{\Σ}}MTAE---\left(5\right)$

In formula: m is the bar number of interconnection in the many microgrids in region.

6) many microgrids electric energy in region exchanges than (Multi-microgrids Exchange Energy/Total Load Energy Ratio； MEER)；This index flows through the ratio of territory, electricity occupied area many microgrids total electric load for calculating interconnection.

$MEER=\frac{MAEE}{\underset{j=1}{\overset{n}{\Σ}}{\∫}_0^{8760}{p}_{load,j}\left(t\right)dt}---\left(6\right)$

In formula: p_load,jT () is the average electric load power of region many micro-grid systems t little period jth microgrid.

7) region many microgrids electric energy exchange rate (Multi-microgrids Exchange Energy/Total Output Ratio； METOR)；This index flows through electricity account for the ratio of many microgrids all units production capacity for calculating interconnection.

$METOR=\frac{MAEE}{MAGE}---\left(7\right)$

8) region many microgrids electric energy abundant intensity (Multi-Microgrids Power Adequacy Index；MPAI)；This index For describing the abundant intensity of electric energy in the many micro-grid systems in region.

$MPAI=\frac{MAGE}{\underset{j=1}{\overset{n}{\Σ}}{\∫}_0^{8760}{p}_{load,j}\left(t\right)dt}---\left(8\right)$

In formula: p_load,jT () is the average electric load power of region many micro-grid systems t little period jth microgrid.

9) microgrid energy local use rate (Microgrid Renewable Energy Local Consumption Ratio；ELCR)； This index is the local use level of distributed power source generated energy in calculating microgrid.

$ELCR=1-{\∫}_0^T\left(\right|p_j\left(t\right)|-p_j(t\left)\right)dt/2\·{\∫}_0^T{p}_{gen,j}\left(t\right)dt.---\left(9\right)$

10) region many microgrids energy local use rate (Multi-Microgrids Renewable Energy Local Consumption Ratio；MELCR)；This index is for zoning many micro-grid systems distributed power source generated energy local use Ratio.

$MELCR=(\underset{j=1}{\overset{n}{\Σ}}{\mathrm{ELCR}}_j\·{\∫}_0^T{p}_{gen,j}(t\left)dt\right)/\underset{i=1}{\overset{n}{\Σ}}{\∫}_0^T{p}_{gen,j}\left(t\right)dt.---\left(10\right)$

In formula: ELCR_jELCR index for jth microgrid.

11) microgrid energy local use time rate (Renewable Energy local consumption Time Ratio；ECTR)； This index is exerted oneself the time scale dissolved by microgrid internal loading completely for calculating micro-grid distributed generation.

$ECTR=\left({\∫}_0^{T}f\right(p_{load,j}\left(t\right)-p_{gen,j}\left(t\right))dt)/T.---\left(11\right)$

In formula: function f (t) is defined as follows:

$f\left(t\right)=f\left(t\right)=\left\{\begin{array}{cc}1& t>0\\ 0& t\≤0\end{array}\right..---\left(12\right)$

12) region many microgrids energy local use time rate (Multi-Microgrids Renewable Energy Local Consumption Time Ratio；MECTR)；This index is used for defining region many micro-grid systems distributed power source and exerts oneself by completely The time scale of on-site elimination.

$MECTR={\∫}_0^T\left(f\right(\underset{j=1}{\overset{n}{\Σ}}{p}_{load,j}\left(t\right)-\underset{j=1}{\overset{n}{\Σ}}{p}_{gen,j}\left(t\right))dt/T.---\left(13\right)$

(2) region many microgrids motility index

1) region many microgrids mean state transition response time (Multi-Microgrids Operation Response Time； MORT)；This index be used for describing the many micro-grid systems in region grid-connected-island state conversion year average response time.

$MORT=\frac{\underset{i=1}{\overset{X}{\Σ}}{T}_{i\_state}\left(t\right)}{X}---\left(14\right)$

In formula: T_{i_state}T () is the average response time of i & lt State Transferring；X is year state conversion frequency.

2) the many piconet islands in region run time scale (Multi-Microgrids Islanded Operation Time Ratio； MIOTR)；This index is for describing the ratio of the many micro-grid systems in region average annual islet operation time and total time in year.

$MIOTR=\frac{\underset{i=1}{\overset{Y}{\Σ}}{T}_{i\_islanded}}{8760}---\left(15\right)$

In formula: T_{i_islanded}For the i & lt islet operation persistent period；Y is year isolated island number of times.

3) region many piconet islands success rate (Multi-Microgrids Isanding Successive Ratio；MISR)； This index is switched to the success rate of islet operation for describing the many micro-grid systems in region by being incorporated into the power networks.

$MISR=\frac{N_{success}}{N_{total}}---\left(16\right)$

In formula: N_success is State Transferring number of success；N_totalFor State Transferring total degree.

4) region many piconet islands service ability (Multi-Microgrid Islanded Operation Ability；MIOA)； This index is for describing the region many micro-grid systems islet operation satisfaction degree for system internal loading.

$MIOA={\∫}_0^{T}f(\underset{j=1}{\overset{n}{\Σ}}{p}_{gen,j}\left(t\right)-\underset{j=1}{\overset{n}{\Σ}}{p}_{load,j}\left(t\right))/T.---\left(17\right)$

In formula: shown in the implication of f (t) function such as above formula (12).

(3) region many microgrids vulnerability and anti-vulnerability inder

1) isolated island longest run time (Multi-Microgrids Islanded Max Duration；MIMD)；This index is used Longest run time under the conditions of describing region many micro-grid systems isolated island.

MIMD=max (T_{i_islanded}) (19)

2) single microgrid fault rate (Microgrid Failure Rate；MFR)；This index is for describing the fault of single microgrid Probability.

$MFR=\frac{\underset{i=1}{\overset{nt}{\Σ}}{T}_i}{8760}---\left(20\right)$

In formula: T_iFor the trouble duration of i & lt fault in microgrid assessment year；Nt assessment year internal fault number of times.

3) region many micro-grid systems fault rate (Multi-Microgrid System Failure Rate；MSFR)；This index is used In the probability of malfunction describing the many micro-grid systems in region.

$MSFR=\frac{\underset{i=1}{\overset{mt}{\Σ}}{T}_{m\_i}}{8760}---\left(21\right)$

In formula: T_{m_i}For the trouble duration of i & lt fault in the many micro-grid systems in region assessment year；Mt assessment year internal fault Number of times.

(4) region many microgrids source-abundance index of lotus

1) many microgrids total load power (Multi-microgrids Total Load；MTL)；This index is many for zoning Microgrid total load power.Specifically, load includes electric load, refrigeration duty and thermic load.

MTL=Σ P_{e_load}+ΣP_{c_load}+ΣP_{h_load} (23)

In formula: P_{e_load}、P_{c_load}、P_{h_load}Average annual electric load, refrigeration duty and thermic load in being respectively the many microgrids in region.

2) region total load power (Regional Total Load Power；RTLP)；This index is used for the many microgrids in zoning Total load power in system region.Specifically, load includes electric load, refrigeration duty and thermic load.

RTLP=Σ P_{e_load_total}+ΣP_{c_load_total}+ΣP_{h_load_total} (24)

In formula: P_{e_load_total}、P_{c_load_total}、P_{h_load_total}Respectively electric load, refrigeration duty and thermic load in many microgrids region General power.

3) many microgrids load in region is powered rate (Multi-microgrids Load Ratio；MLR)；This index is used for calculating many The ratio of territory, the load occupied area total load that microgrid is contained.

$MLR=\frac{MTL}{RTLP}---\left(25\right)$

In formula: MTL, RTLP implication is as indicated above.

4) many microgrids total power generating capacity (Multi-microgrids Total Installation Capacity；MTIC)；Should Index is used for zoning many micro-grid systems total installation of generating capacity.

MTIC=Σ P_ec (26)

In formula: P_ecPower for all microgrids total rated power of unit.

5) many microgrids capacity-load ratio (Multi-microgrid Load/installed Capacity Ratio；MLCR)；This index Total load and the ratio of total installation of generating capacity in calculating many micro-grid systems.

$MLCR=\frac{MTL}{MTIC}---\left(27\right)$

In formula: the implication of MTL, MTIC is as indicated above.

6) system total load amount (Multi-microgrids System Total Load；MSTL), the most micro-for zoning The total load level of all microgrids in net system.Its expression formula is:

$MSTL=\underset{n=1}{\overset{N}{\Σ}}{\∫}_0^T{P}_{load,n}\left(t\right)dt---\left(28\right)$

In formula: N is microgrid number in the many micro-grid systems in region；T is year hourage, usual value 8760；P_load,nT () is microgrid The average load power of t in n.

7) system core workload demand (Multi-microgrids System Critical Load Demand；MSCLD)

(kW), the critical load electricity consumption level of all microgrids in the many micro-grid systems in zoning.Its expression formula is:

$MSCLD=\underset{n=1}{\overset{N}{\Σ}}{\∫}_0^T{P}_{c\_load,n}\left(t\right)dt---\left(29\right)$

In formula: N is microgrid number in the many micro-grid systems in region；T is year hourage, usual value 8760；P_{c_load,n}T () is microgrid The average load power of the critical load of t in n.

8) the non-key workload demand of system (Multi-microgrids System Noncritical Load Demand；MSNLD) (kW), the electricity consumption level of the non-key load of all microgrids in the many micro-grid systems in zoning.Its expression formula is:

$MSNLD=\underset{n=1}{\overset{N}{\Σ}}{\∫}_0^T{P}_{nc\_load,n}\left(t\right)dt---\left(30\right)$

In formula: N is microgrid number in the many micro-grid systems in region；T is year hourage, usual value 8760；P_{nc_load,n}T () is micro- The average load power of the non-key load of t in net n.

9) system gross generation (Multi-microgrids System Total Energy Generation；MSTEG) kWh): This index reflects the year gross generation of the generating equipment such as distributed power source in the many micro-grid systems in region.Its expression formula is:

$MSTEG=\underset{n=1}{\overset{N}{\Σ}}{\∫}_0^T{P}_{gen,n}\left(t\right)dt---\left(31\right)$

In formula: N is microgrid number in the many micro-grid systems in region；T is year hourage, usual value 8760；P_gen,nT () is microgrid n The average generated output of middle t.

10) system core load ratio (Multi-microgrids System Critical Load Level；MSCLL) (100%): This index reflects the accounting of critical load in the many micro-grid systems in region.Its expression formula is:

$MSCLL=\frac{\underset{n=1}{\overset{N}{\Σ}}{\∫}_0^T{P}_{c\_load,n}\left(t\right)dt}{MSTL}---\left(32\right)$

In formula: N is microgrid number in the many micro-grid systems in region；T is year hourage, usual value 8760；P_{c_load,n}T () is microgrid The critical load mean power of t in n.

(5) many microgrids multipotency in region utilizes index

1) region many microgrids multipotency number of types (Multi-Microgrids Multi-energy Type；MMT)；This index is used for The energy source type sum that user utilizes in microgrid to be assessed is described；The energy source type specifically contained includes: electric, hot and cold, natural Gas etc..

MMT=me (33)

In formula: polymorphic type energy quantity in the microgrid of me region.

2) region many microgrids electricity/heat demand ratio (Multi-Microgrids Electrical and Thermal Demand Ratio； METR)；This index is the average annual electric load of user and the ratio of thermic load in the many microgrids of assessment area.

$METR={\∫}_0^T\frac{\underset{j=1}{\overset{n}{\Σ}}{p}_{load,j}\left(t\right)}{\underset{j=1}{\overset{n}{\Σ}}(q_{c,j}\left(t\right)+q_{h,j}\left(t\right))}dt---\left(34\right)$

In formula: p_load,jT () is the electric load power of t jth microgrid user；q_c,j(t),q_h,jT () is respectively t jth The refrigeration of individual microgrid user, the power of heat load.

3) microgrid electricity/hot charging machine capacity ratio (Microgrid Electrical and Thermal Installation Capacity Ratio；METCR)；This index is the ratio of electricity/hot installed capacity in assessment area microgrid.

$METCR=\frac{{\mathrm{\ΣP}}_{ec}}{{\mathrm{\ΣP}}_{tc}}---\left(35\right)$

In formula: P_ecPower for all microgrids total rated power of unit.P_tcRated power for all thermal power plant unit.

4) region many microgrids power supplying efficiency (Multi-Microgrids Power Efficiency；MPE)；This index is used for assessing The efficiency that the many micro-grid systems in region are powered.

In formula: each symbol implication is as implied above.

5) region many microgrids heating efficiency (Multi-Microgrid Thermal Efficiency；MTE) this index is used for assessing The efficiency of region many micro-grid systems heat supply.

In formula: q_c,jT () is region many microgrids interior-heat load power.

6) region many microgrids cooling efficiency (Multi-Microgrids Cooling Efficiency；MCE) this index is used for assessing The efficiency of region many micro-grid systems cooling.

In formula: q_h,jT () is refrigeration duty power in the many microgrids in region.

7) microgrid entirety energy supply efficiency (Microgrid Overall Energy Efficiency；MOEE)；This index is used for commenting Overall efficiency of energy utilization hot and cold and electric in estimating region microgrid.

$MOEE=\frac{MTL}{{\∫}_0^{8760}{f}_m\left(t\right)+e_{grid}\left(t\right)/\mathrm{\η}}dt---\left(39\right)$

In formula: f_mT () is the wear rate of t natural gas；Unit is kW；e_gridT () is the t electric work from electrical network power purchase Rate, unit is kW.η is the bulk supply efficiency of electrical network.

8) the many microgrids in region are powered carbon emission amount (Multi-Microgrids Carbon Emission per Unit Power Energy； MCEUP)；This index is for describing the ratio of region many micro-grid systems power consumption and carbon emission amount.

9) region many microgrids heat supply carbon emission amount (Multi-Microgrids Carbon Emission per Unit Heating Energy；MCEUH)；This index is for describing the ratio of region many micro-grid systems heating load and carbon emission amount.

10) region many microgrids cooling carbon emission amount (Multi-Microgrid Carbon Emission per Unit Cooling Energy；MCEUH)；This index is for describing the ratio of region many micro-grid systems semen donors and carbon emission amount.

11) region many microgrids unit energy consumption carbon emission amount (Multi-Microgrid Carbon Emission per Unit Energy； MCEUE)；This index is for describing the ratio of region many micro-grid systems unit energy consumption and carbon emission amount.

$MCEUE={\∫}_{t=0}^{8760}\frac{{\mathrm{\μ}}_f\·f_m\left(t\right)+{\mathrm{\μ}}_e{e}_{grid}\left(t\right)}{\underset{j=1}{\overset{n}{\Σ}}{q}_{c,j}\left(t\right)+q_{h,j}\left(t\right)+p_{load,j}\left(t\right)}dt---\left(43\right)$

In formula: μ_fFor the carbon emission amount of unit natural gas, unit g/kWh；μ_eFor electrical network unit of electrical energy carbon emission amount, unit g/kWh. Other symbol implications are as implied above.

See Fig. 1, this region many microgrids integrated evaluating method realize system need two aspects support: master data acquisition system (hardware supported) and integrated estimation system (software development).

Master data acquisition system is mainly used in the master data situation required for the assessment of collecting zone many microgrids.Master data gathers System mainly gathers the data of the following aspects:

1. region many microgrids structure and configuration data.Specifically include: 1) configuration data of device in each microgrid and operation Parameter；2) situation is got in touch with between microgrid；3) microgrid place distribution topological data.

2. region many microgrids wind, light and load data.Specifically include: 1) microgrid region wind, light year gather number According to 2) the hot and cold and basic parameter of electric load in each microgrid.

Integrated estimation system is based primarily upon the computational methods of data and the index collected and calculates the region many microgrids index responded.Tool Body performance is as follows:

1. in the many microgrids of input area, in each microgrid, distributed power source configures data and load condition data；Sampling region In many microgrids, user is for the demand of hot and cold load.Specify joining of communication relationship and many microgrids place, region between the many microgrids in region The topological structure of net and load condition.

2. obtain region many microgrids source-lotus index in the many microgrids comprehensive assessment index of region by above-mentioned data.

3. in setting up the many microgrids of distributed electrical source model region of sampling, distributed power source goes out force data and cold, heat and electricity triple supply The service data of equipment；Set up microgrid equivalent model under the conditions of the many microgrids in region；Obtain going out between each microgrid by Load flow calculation Force data.Specifically, distributed electrical source model and sampling approach are as follows:

1) wind velocity distributing paremeter model is obtained based on year air speed data；The general of atmospheric transparency is set up based on photometric data Rate distributed model, and the Probability Characteristics of intensity of illumination is obtained by the relation indirect of atmospheric transparency Yu photovoltaic；Base The probability Distribution Model of load is set up in historical load data；

2) based on step 1) model sampling wind speed, intensity of illumination and the load data set up.Go out with blower fan according to wind speed Power relation, the relation that intensity of illumination and photovoltaic are exerted oneself obtains the situation of exerting oneself of distributed power source in microgrid.

3) based on cold in microgrid and hot load state, the running state data of hot and cold and electric triple supply equipment is obtained, i.e. The generated energy of hot and cold and electric triple supply equipment, heat supply/data such as semen donors, amount of consumed gas.

4) exert oneself situation, load condition, triple supply equipment service data and district according to distributed power source in each microgrid Communication relationship between the many microgrids in territory, uses Load flow calculation instrument to obtain energy Flow relation between the many microgrids in region.

4. in zoning many microgrids index region many microgrids multipotency utilize index and region many microgrids motility index and Region many microgrid energy interactivity index.

5. the index such as piconet island number of run, islet operation persistent period in statistical estimation year；In conjunction with load data Distributed power source and the configuration capacity of energy storage in each microgrid in microgrids many with region, obtain region many microgrids vulnerability with the most crisp Weak property index.

The most so far from region many microgrid energy interactivity index, region many microgrids motility index, the many microgrids in region fragility Property utilizes five aspects of index to be commented with anti-vulnerability inder, region many microgrids source-lotus index and region many microgrids multipotency Estimate the index of region many microgrids combination property.

7. utilize the performance of the many micro-grid systems of put forward index comprehensive evaluation.

Claims (1)

1. region many microgrids integrated evaluating method, this evaluation methodology is first flexible from region many microgrid energy interactivity index, the many microgrids in region Property index, region many microgrids vulnerability and anti-vulnerability inder, region many microgrids source-lotus index and region many microgrids multipotency utilize five aspects of index Quantization areas many microgrids comprehensive assessment index, comprises:

(1) region many microgrid energy interactivity index

1) the many microgrids in region export electricity MAOE every year, and for zoning, many microgrids are every year to the electricity summation of external electrical network output:

$MAOE={\∫}_0^T\underset{i=1}{\overset{n}{\Σ}}\left(\right|p_i\left(t\right)|-p_i(t\left)\right)/2dt.---\left(1\right)$

In formula: p_iT () is the power that t flows into i-th microgrid；N is microgrid number in the many micro-grid systems in region, and T is the total time calculated Section；

2) region many microgrids annual average power generation MAGE, the average annual gross generation of all distributed power sources of each microgrid in the many microgrids in zoning:

$MAGE=\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{\∫}_0^T{p}_{gen,i}\left(t\right)dt.---\left(2\right)$

In formula: p_gen,iT () is the generated output of i-th microgrid t；

3) the many microgrids in region output electric energy is than MEOR, and for zoning, many micro-grid systems output territory, electric energy occupied area many micro-grid systems distributed power source is total The ratio of generated energy:

MEOR-MAOE/MAGE (3)

4) region many microgrids interconnection average annual electric energy exchange capacity MTAE, is used for calculating many micro-grid system interconnections and circulates every year electricity:

$MTAE={\∫}_0^T{P}_{i\_exchange}\left(t\right)dt---\left(4\right)$

In formula: P_{i_exchange}(t) be in microgrid i-th article of interconnection at the average flowing-through power of t little period；

5) the average annual electric energy of region many microgrids interconnection total exchange capacity MAEE, is used for calculating many micro-grid systems interconnection and circulates every year electricity:

$MAEE=\underset{i=1}{\overset{m}{\Σ}}MTAE---\left(5\right)$

In formula: m is the bar number of interconnection in the many microgrids in region；

6) region many microgrids electric energy exchange ratio MEER, flows through the ratio of territory, electricity occupied area many microgrids total electric load for calculating interconnection:

$MEER=\frac{MAEE}{\underset{j=1}{\overset{n}{\mathrm{\Σ}}}{\∫}_0^{8760}{p}_{load,j}\left(t\right)dt}---\left(6\right)$

In formula: p_load,jT () is the average electric load power of region many micro-grid systems t little period jth microgrid；

7) region many microgrids electric energy exchange rate METOR, flows through electricity account for the ratio of many microgrids all units production capacity for calculating interconnection:

$METOR=\frac{MAEE}{MAGE}---\left(7\right)$

8) region many microgrids electric energy abundant intensity MPAI, for describing the abundant intensity of electric energy in the many micro-grid systems in region:

$MPAI=\frac{MAGE}{\underset{j=1}{\overset{n}{\Σ}}{\∫}_0^{8760}{p}_{load,j}\left(t\right)dt}---\left(8\right)$

In formula: p_load,jT () is the average electric load power of region many micro-grid systems t little period jth microgrid；

9) microgrid energy local use rate ELCR, the local use level of distributed power source generated energy in calculating microgrid:

$ELCR=1-{\∫}_0^T\left(\right|p_j\left(t\right)|-p_j(t\left)\right)dt/2\·{\∫}_0^T{p}_{gen,j}\left(t\right)dt.---\left(9\right)$

10) region many microgrids energy local use rate MELCR, this index is used for zoning many micro-grid systems distributed power source generated energy local use Ratio:

$MELCR=(\underset{j=1}{\overset{n}{\Σ}}{\mathrm{ELCR}}_j\·{\∫}_0^T{p}_{gen,j}(t\left)dt\right)/\underset{i=1}{\overset{n}{\Σ}}{\∫}_0^T{p}_{gen,j}\left(t\right)dt.---\left(10\right)$

In formula: ELCR_jELCR index for jth microgrid；

11) microgrid energy local use time rate ECTR, exerts oneself the time scale dissolved by microgrid internal loading completely for calculating micro-grid distributed generation:

$ECTR=\left({\∫}_0^{T}f\right(p_{load,j}\left(t\right)-p_{gen,j}\left(t\right)\left)dt\right)/T.---\left(11\right)$

In formula: function f (t) is defined as follows:

$f\left(t\right)=f\left(t\right)=\left\{\begin{array}{cc}1& t>0\\ 0& t\≤0\end{array}\right..---\left(12\right)$

12) region many microgrids energy local use time rate MECTR, is used for defining region many micro-grid systems distributed power source and exerts oneself and disappeared the most on the spot The time scale received:

$MECTR={\∫}_0^T\left(f\right(\underset{j=1}{\overset{n}{\Σ}}{p}_{load,j}\left(t\right)-\underset{j=1}{\overset{n}{\Σ}}{p}_{gen,j}\left(t\right))dt/T.---\left(13\right)$

(2) region many microgrids motility index

1) region many microgrids mean state transition response time MORT, be used for describing the many micro-grid systems in region grid-connected-average ring in island state conversion year Between Ying Shi:

$MORT=\frac{\underset{i=1}{\overset{X}{\Σ}}{T}_{i\_state}\left(t\right)}{X}---\left(14\right)$

In formula: T_{i_state}T () is the average response time of i & lt State Transferring；X is year state conversion frequency；

2) the many piconet islands in region run time scale MIOTR, for describing the many micro-grid systems in region average annual islet operation time and total time in year Ratio:

$MIOTR=\frac{\underset{i=1}{\overset{Y}{\Σ}}{T}_{i\_islanded}}{8760}---\left(15\right)$

In formula: T_{i_islanded}For the i & lt islet operation persistent period；Y is year isolated island number of times；

3) region many piconet islands success rate MISR, is switched to the success rate of islet operation for describing the many micro-grid systems in region by being incorporated into the power networks；

$MISR=\frac{N_{success}}{N_{total}}---\left(16\right)$

In formula: N_success is State Transferring number of success；N_totalFor State Transferring total degree；

4) region many piconet islands service ability MIOA, for describing the region many micro-grid systems islet operation satisfaction degree for system internal loading:

$MIOA={\∫}_0^{T}f\left(\underset{j=1}{\overset{n}{\Σ}}{p}_{gen,j}\right(t)-\underset{j=1}{\overset{n}{\Σ}}{p}_{load,j}(t\left)\right)/T.---\left(17\right)$

In formula: shown in the implication of f (t) function such as formula (12)；

(3) region many microgrids vulnerability and anti-vulnerability inder

1) isolated island longest run time MIMD, the longest run time under the conditions of describing region many micro-grid systems isolated island:

MIMD=max (T_{i_islanded}) (19)

2) single microgrid fault rate MFR, for describing the probability of malfunction of single microgrid:

$MFR=\frac{\underset{i=1}{\overset{nt}{\Σ}}{T}_i}{8760}---\left(20\right)$

In formula: T_iFor the trouble duration of i & lt fault in microgrid assessment year；Nt assessment year internal fault number of times；

3) region many micro-grid systems fault rate MSFR, for describing the probability of malfunction of the many micro-grid systems in region:

$MSFR=\frac{\underset{i=1}{\overset{mt}{\Σ}}{T}_{m\_i}}{8760}---\left(21\right)$

In formula: T_{m_i}For the trouble duration of i & lt fault in the many micro-grid systems in region assessment year；Mt assessment year internal fault number of times；

(4) region many microgrids source-lotus index

1) many microgrids total load power MTL, for zoning many microgrids total load power:

MTL=Σ P_{e_load}+ΣP_{c_load}+ΣP_{h_load} (23)

In formula: P_{e_load}、P_{c_load}、P_{h_load}Average annual electric load, refrigeration duty and thermic load in being respectively the many microgrids in region；

2) region total load power RTLP, total load power in many micro-grid systems region, zoning:

RTLP=Σ P_{e_load_total}+ΣP_{c_load_total}+ΣP_{h_load_total} (24)

In formula: P_{e_load_total}、P_{c_load_total}、P_{h_load_total}Respectively electric load, refrigeration duty and the general power of thermic load in many microgrids region； 3) many microgrids load in region is powered rate MLR, for calculating the ratio of territory, the load occupied area total load that many microgrids are contained:

$MLR=\frac{MTL}{RTLP}---\left(25\right)$

4) many microgrids total power generating capacity MTIC, for zoning many micro-grid systems total installation of generating capacity:

MTIC=Σ P_ec (26)

In formula: P_ecPower for all microgrids total rated power of unit；

5) many microgrids capacity-load ratio MLCR, total load and the ratio of total installation of generating capacity in calculating many micro-grid systems；

$MLCR=\frac{MTL}{MTIC}---\left(27\right)$

In formula: the implication of MTL, MTIC is as indicated above；

6) system total load amount MSTL, the total load level of all microgrids in the many micro-grid systems in zoning；Its expression formula is:

$MSTL=\underset{n=1}{\overset{N}{\mathrm{\Σ}}}{\∫}_0^T{P}_{load,n}\left(t\right)dt---\left(28\right)$

In formula: N is microgrid number in the many micro-grid systems in region；T is year hourage, usual value 8760；P_load,nT () is t in microgrid n Average load power；

7) system core workload demand MSCLD (kW), the critical load electricity consumption level of all microgrids in the many micro-grid systems in zoning；

Its expression formula is:

$MSCLD=\underset{n=1}{\overset{N}{\mathrm{\Σ}}}{\∫}_0^T{P}_{c\_load,n}\left(t\right)dt---\left(29\right)$

In formula: N is microgrid number in the many micro-grid systems in region；T is year hourage, usual value 8760；P_{c_load,n}T () is t in microgrid n The average load power of critical load；

8) system non-key workload demand MSNLD (kW), the electricity consumption level of the non-key load of all microgrids in the many micro-grid systems in zoning； Its expression formula is:

$MSNLD=\underset{n=1}{\overset{N}{\mathrm{\Σ}}}{\∫}_0^T{P}_{nc\_load,n}\left(t\right)dt---\left(30\right)$

In formula: N is microgrid number in the many micro-grid systems in region；T is year hourage, usual value 8760；P_{nc_load,n}T () is t in microgrid n The average load power of non-key load；

9) system gross generation MSTEG (kWh): this index reflects the year gross generation of the generating equipment such as distributed power source in the many micro-grid systems in region； Its expression formula is:

$MSTEG=\underset{n=1}{\overset{N}{\mathrm{\Σ}}}{\∫}_0^T{P}_{gen,n}\left(t\right)dt---\left(31\right)$

In formula: N is microgrid number in the many micro-grid systems in region；T is year hourage, usual value 8760；P_gen,nT () is t in microgrid n Average generated output；

10) accounting of critical load in system core load ratio MSCLL (100%): this index reflects the many micro-grid systems in region；Its expression formula is:

$MSCLL=\frac{\underset{n=1}{\overset{N}{\Σ}}{\∫}_0^T{P}_{c\_load,n}\left(t\right)dt}{MSTL}---\left(32\right)$

In formula: N is microgrid number in the many micro-grid systems in region；T is year hourage, usual value 8760；P_{c_load,n}T () is t in microgrid n Critical load mean power；

(5) many microgrids multipotency in region utilizes index

1) region many microgrids multipotency number of types MMT, the energy source type sum that user utilizes in describing microgrid to be assessed:

MMT=me (33)

In formula: polymorphic type energy quantity in the microgrid of me region；

2) region many microgrids electricity/heat demand is than METR, the average annual electric load of user and the ratio of thermic load in the many microgrids of assessment area:

$METR={\∫}_0^T\frac{\underset{j=1}{\overset{n}{\Σ}}{p}_{load,j}\left(t\right)}{\underset{j=1}{\overset{n}{\Σ}}\left(q_{c,j}\right(t)+q_{h,j}(t\left)\right)}dt---\left(34\right)$

In formula: p_load,jT () is the electric load power of t jth microgrid user；q_c,j(t),q_h,jT () is respectively t jth microgrid user Refrigeration, the power of heat load；

3) microgrid electricity/hot charging machine capacity ratio METCR, the ratio of electricity/hot installed capacity in assessment area microgrid:

$METCR=\frac{{\mathrm{\ΣP}}_{ec}}{{\mathrm{\ΣP}}_{tc}}---\left(35\right)$

In formula: P_ecPower for all microgrids total rated power of unit；P_tcRated power for all thermal power plant unit；

4) region many microgrids power supplying efficiency (Multi-Microgrids Power Efficiency；MPE)；This index is used for the many microgrids of assessment area The efficiency of system power supply；

5) region many microgrids heating efficiency MTE, for the efficiency of assessment area many micro-grid systems heat supply:

In formula: q_c,jT () is region many microgrids interior-heat load power；

6) region many microgrids cooling efficiency MCE, for the efficiency of assessment area many micro-grid systems cooling:

In formula: q_h,jT () is refrigeration duty power in the many microgrids in region；

7) microgrid entirety energy supply efficiency MOEE, overall efficiency of energy utilization hot and cold and electric in assessment area microgrid:

$MOEE=\frac{MTL}{{\∫}_0^{8760}{f}_m\left(t\right)+e_{grid}\left(t\right)/\mathrm{\η}}dt---\left(39\right)$

In formula: f_mT () is the wear rate of t natural gas；Unit is kW；e_gridT () is the t electrical power from electrical network power purchase, unit is kW； η is the bulk supply efficiency of electrical network；

8) the many microgrids in region are powered carbon emission amount MCEUP, for describing the ratio of region many micro-grid systems power consumption and carbon emission amount；

9) region many microgrids heat supply carbon emission amount MCEUH, for describing the ratio of region many micro-grid systems heating load and carbon emission amount；

10) region many microgrids cooling carbon emission amount MCEUH, for describing the ratio of region many micro-grid systems semen donors and carbon emission amount；

11) region many microgrids unit energy consumption carbon emission amount MCEUE, for describing the ratio of region many micro-grid systems unit energy consumption and carbon emission amount；

$MCEUE={\∫}_{t=0}^{8760}\frac{{\mathrm{\μ}}_f\·f_m\left(t\right)+{\mathrm{\μ}}_e{e}_{grid}\left(t\right)}{\underset{j=1}{\overset{n}{\Σ}}{q}_{c,j}\left(t\right)+q_{h,j}\left(t\right)+p_{load,j}\left(t\right)}dt---\left(43\right)$

In formula: μ_fFor the carbon emission amount of unit natural gas, unit g/kWh；μ_eFor electrical network unit of electrical energy carbon emission amount, unit g/kWh；

Evaluation procedure is as follows:

One, in the many microgrids of input area, in each microgrid, distributed power source configures data and load condition data；In sampling region many microgrids user for The demand of hot and cold load, specifies topological structure and the load condition of the distribution at communication relationship and many microgrids place, region between the many microgrids in region；

Two, region many microgrids source-lotus index in the many microgrids comprehensive assessment index of region is obtained by above-mentioned data；

Three, set up distributed power source in the many microgrids of distributed electrical source model region of sampling and go out the service data of force data and cold, heat and electricity triple supply equipment； Set up microgrid equivalent model under the conditions of the many microgrids in region；Obtain going out force data between each microgrid by Load flow calculation；

Four, in zoning many microgrids index, region many microgrids multipotency utilizes index and region many microgrids motility index and the many microgrid energy in region Interactivity index；

Five, the index such as piconet island number of run, islet operation persistent period in statistical estimation year；In conjunction with each in the many microgrids of load data and region Distributed power source and the configuration capacity of energy storage in individual microgrid, obtain region many microgrids vulnerability and anti-vulnerability inder；

Six, this from region many microgrid energy interactivity index, region many microgrids motility index, region many microgrids vulnerability and anti-vulnerability inder, Many microgrids source, region-lotus index and region many microgrids multipotency utilize five aspects of index to obtain the index of assessment area many microgrids combination property.