2022 electrician cup a question high proportion wind power system energy storage operation and configuration analysis ideas

*A topic Energy storage operation and configuration analysis of high proportion wind power system *
2022 Electrician Cup A Question: how to obtain ideas for energy storage operation and configuration analysis of high proportion wind power system : https://jq.qq.com/?_wv=1027&k=BZgDWH1Y
2022 Electrician Cup A Question: how to obtain ideas for energy storage operation and configuration analysis of high proportion wind power system : https://jq.qq.com/?_wv=1027&k=BZgDWH1Y
2022 Electrician Cup A Question: how to obtain ideas for energy storage operation and configuration analysis of high proportion wind power system : https://jq.qq.com/?_wv=1027&k=BZgDWH1Y
“ Carbon neutralization ” Driven by the goal, the future power system will be a high proportion of renewable energy power system , The strong random fluctuation of renewable energy output power leads to the difficulty of real-time power balance in system operation ; Energy storage is considered to be an effective means to ensure the real-time power balance of the system , Because the cost of energy storage is relatively expensive , Using energy storage to balance system power will increase system operation cost ; Take the high proportion wind power system as an example , To explore the “ Supply side ” The low-carbon transformation has great impact on the economy of power system operation 、 Reliability impact .

The system to be studied includes thermal power 、 Wind power 、 Energy storage and load , Thermal power unit 3 platform 、 The installed capacity 1050MW; Wind power one day 、 Load normalized power （1.0p.u. Wind power corresponds to its installed capacity ,1.0p.u. The load corresponds to the maximum load power ） See Annex for data 1, Wind power penetration rate （ The ratio of maximum wind power to maximum load power ） Increasing may cause the system to abandon wind 、 Loss of load , Affect the power balance of the system .

Definition ： Unit power supply cost of the system = Total power generation cost of the system / Total load power of the system , Total cost of power generation = Thermal power costs + Wind power costs + Energy storage cost + Loss of abandoned wind + Loss of load , among ：

Thermal power costs include operating costs 、 Carbon capture costs , The operation cost of thermal power consists of operation and maintenance cost and coal consumption cost of power generation , The relationship between coal consumption for power generation and its output ：F = aP2 + bP + c ,F Is the coal consumption of the unit （kg/h）,P Contribute to the unit /MW; The operation and maintenance cost is calculated according to 0.5 Times the coal consumption

Cost considerations , Carbon capture cost depends on carbon emissions and carbon capture unit price , Relevant parameters of thermal power units

The figures are shown in the attached table 1 Shown , The price of power coal is 700 element /t.

The wind power cost only considers the operation and maintenance cost , Relevant parameters are shown in the attached table 2.

The energy storage cost is determined by the investment cost 、 Composition of operation and maintenance costs , Relevant parameters are shown in the attached table 3. notes ： When calculating the daily cost , The investment cost needs to be amortized to every day , The average daily investment cost = Total investment cost / Service life /365 God .

The loss of abandoned wind is calculated as 0.3 element /kWh Calculation , Loss of load shall be calculated as per 8 element /kWh Calculation .

Basic questions ：

Assume the maximum daily load power of the system 900MW, The unit carbon capture costs are 0 element /t、60 element

/t、80 element /t、100 element /t, Perturbed wind power permeability , Analyze and calculate the following problems ：

\1. No wind power is connected , Thermal power operates at minimum cost , Draw the unit daily generation plan curve , Calculate the unit power supply cost of the system , Fill in the results in the table 1 Corresponding column （ Keep three significant digits ）.

\2. Wind power installation 300MW、 Substitute unit 3 when , What happens to the power balance of the system ？ Abandon wind power

How much ？ In this scenario , To reduce wind abandonment without loss of load , How much can the installed capacity of wind power access be reduced ？

\3. Wind power installation 600MW、 Substitute unit 2 when , What happens to the power balance of the system ？ In this scenario , In order not to lose load , How much can the wind power access capacity be increased ？

\4. In view of the above 2-3 Wind power alternative scenario , Consider the above 4 The cost of carbon capture , The system supplies power at the lowest power generation cost , Calculate the unit power supply cost of the system , And fill the relevant calculation results in the table 2、3.

\5. Wind power installation 900MW、 Substitute unit 2、3 when , How much power is lost under load ？ In order not to lose load , What is the minimum energy storage capacity that needs to be configured （ Charging and discharging efficiency of energy storage 90%）？ Consider the cost of energy storage 、 Unit carbon capture cost （ take 60 element /t）, How much is the unit power supply cost of the system ？

\6. When the load power is constant , Try to analyze what challenges the increasing replacement capacity of wind power brings to the reliable power supply of the system ？ To ensure reliable power supply , What changes have taken place in the unit power supply cost of the system ？ Combine the above calculation results for quantitative analysis .

Extended questions ：

\7. For attachments 2 Fifteen day load power shown （ Maximum 1200MW）、 Wind power （ The installed capacity 1200MW）, Wind power replaces thermal power units 2、3 scenario , What is the problem with the system power balance ？ Please design possible power balance solutions , The feasibility and effectiveness of the scheme are discussed .

surface 1 The proportion of wind power is 0 Statistics of relevant indicators of the system

* Carbon capture costs **（ element /t）*	* Thermal power operation cost **（ Ten thousand yuan ）*	* Carbon capture costs **（ Ten thousand yuan ）*	* Total generation cost **（ Ten thousand yuan ）*	* Unit power supply cost **（ Ten thousand yuan ）*
*0*
*60*
*80*
*100*

surface 2 Wind power installation 300MW Substitute unit 3 Statistics of relevant indicators of the system

* The carbon capture unit is *	* Operation of thermal motor unit *	* Carbon capture costs *	* Wind power operation and maintenance costs *	* Loss of abandoned wind *	* Loss of load *	* Unit power supply cost *
* Ben （ element /t）*	* Line cost / Ten thousand yuan *	*/ Ten thousand yuan *	*/ Ten thousand yuan *	Abandoned wind power /MWh	Loss of abandoned wind / Ten thousand yuan	Loss of load capacity /MWh	Loss of load / Ten thousand yuan	*（ element /kWh）*
*0*
*60*
*80*
*100*

surface 3 Wind power installation 600MW Substitute unit 2 Statistics of relevant indicators of the system

* The carbon capture unit is *	* Operation of thermal motor unit *	* Carbon capture costs *	* Wind power operation and maintenance costs *	* Loss of abandoned wind *	* Loss of load *	* Unit power supply cost *
* Ben （ element /t）*	* Line cost / Ten thousand yuan *	*/ Ten thousand yuan *	*/ Ten thousand yuan *	Abandoned wind power /MWh	Loss of abandoned wind / Ten thousand yuan	Loss of load capacity /MWh	Loss of load / Ten thousand yuan	*（ element /kWh）*
*0*
*60*
*80*
*100*