阅读说明：本技术 一种风电场有功功率变化率控制系统 (A kind of active power of wind power field change rate control system ) 是由 刘双 武俊峰 姜存进 张正华 肖正江 于 2019-08-21 设计创作，主要内容包括：本发明公开了一种风电场有功功率变化率控制系统,所述系统包括：风电场电力总成；控制模块；并网点模块；有功功率变化率最大限值计算模块；有功调节方向判断模块；有功功率实发值检测模块；计时器模块；存储模块；滚动修正模块,本发明采用周期性调节和实时突降检测相结合,能够有效地解决各种气象条件下风电场有功功率变化率越限问题。(The invention discloses a kind of active power of wind power field change rate control system, the system comprises: wind power plant electric power assembly；Control module；Grid-connected point module；Active power change rate threshold limit value computing module；Active adjusting walking direction module；Active power reality hair value detection module；Timer module；Memory module；Rolling amendment module, the present invention are combined using periodic adjustment and the detection of real-time bust, can efficiently solve the out-of-limit problem of active power of wind power field change rate under various meteorological conditions.)

1. a kind of active power of wind power field change rate control system, which is characterized in that the system comprises:

Wind power plant electric power assembly: guarantee the equipment that wind-power electricity generation is effectively run；

Control module: connecting with modules, is used for sending and receiving data, analyzes data, passes through the operation of data message control system；

Grid-connected point module: booster stations high-voltage side bus or output aggregation point；

Active power change rate threshold limit value computing module: connecting with wind power plant electric power assembly, calculates wind-powered electricity generation for real-time monitoring The threshold limit value of active power change rate in, and numerical value is sent to control module；

Active adjusting walking direction module: connecting with grid-connected point module, for judging active adjusting direction；

Active power reality hair value detection module: connecting with grid-connected point module, for detecting active power reality hair value in grid entry point Situation of change, and active power control target value is arranged according to the situation of change of active power reality hair value；

Timer module: connecting with control module, for setting the control period according to demand for control, comes then when controlling the period, It obtains Data Concurrent to send to control module, makes control module that the data sent be combined to realize that corresponding control operates to module；

Memory module: for store active power per minute in fact hair Value Data, active power change rate threshold limit value data and Active power controller target value；

Rolling amendment module: connecting with memory module, according to the rolling period of setting, keeps active power change rate limit value data all The rolling of phase property covers.

2. a kind of active power of wind power field change rate control system according to claim 1, it is characterised in that: the system It further include the comparator module being connect with active power reality hair value detection module, for the real-time active power at current time is real Hair value is compared with the active power reality hair value of last moment, and grid entry point real power control target is arranged according to comparison result Value.

3. a kind of active power of wind power field change rate control system according to claim 1, it is characterised in that: the control It include the data reception module being connect with grid entry point for receiving the active command value in grid entry point in module.

4. a kind of active power of wind power field change rate control system according to claim 3, it is characterised in that: the control It include for sending control information to the data transmission blocks executed in corresponding module in module.

5. a kind of active power of wind power field change rate control system according to claim 4, it is characterised in that: the control It include being connect with data reception module in module, the instruction judgment module for being judged the validity of received instruction.

6. a kind of active power of wind power field change rate control system according to claim 2, it is characterised in that: current time A length of 1-5s when with the interval of last moment.

7. a kind of active power of wind power field change rate control system according to claim 1, it is characterised in that: the rolling Period is 10-15min.

Technical field

The invention belongs to technical field of electric power system control, and in particular to a kind of active power of wind power field change rate control system System.

Background technique:

In recent years, wind-power electricity generation generates electricity as renewable and clean energy resource and is greatly developed.Wind-power electricity generation has randomness And intermittence, the extensive access of wind-power electricity generation bring very big influence, especially wind-powered electricity generation function to the safe operation of electric system The rate short time, significantly fluctuation will bring enormous impact to power grid." Q/GDW 1392-2015 wind power plant accesses electric power network technique Regulation " tool is proposed to wind power plant active power variation in 1 minute under normal operation and 10 minutes active power variation limit values Body requirement, it is therefore necessary to study the control method of active power of wind power field variation on the basis of Grid-connection standards provide, guarantee electricity The safe and stable operation of net.

Currently, not comprehensively considering the influence of various meteorological conditions, especially in active power of wind power field change rate control algolithm When being wind speed suddenly change, Power Output for Wind Power Field sharply declines, rises, and it is not too ideal for leading to actual effect.Wind power plant During operation, owner's Chang Yin active power change rate does not meet the grid-connected requirement of scheduling and is examined.

Summary of the invention

The purpose of the present invention is to provide a kind of active power of wind power field change rate control systems, to solve in the prior art The defect of caused wind power plant fluctuation of service.

A kind of active power of wind power field change rate control system, the system comprises:

Wind power plant electric power assembly: guarantee the equipment that wind-power electricity generation is effectively run；

Control module: connecting with modules, is used for sending and receiving data, analyzes data, passes through data message control system Operation；

Grid-connected point module: booster stations high-voltage side bus or output aggregation point；

Active power change rate threshold limit value computing module: connecting with wind power plant electric power assembly, calculates for real-time monitoring The threshold limit value of active power change rate in wind power plant, and numerical value is sent to control module；

Active adjusting walking direction module: connecting with grid-connected point module, for judging active adjusting direction；

Active power reality hair value detection module: connecting with grid-connected point module, sends out in fact for detecting active power in grid entry point The situation of change of value, and active power control target value is arranged according to the situation of change of active power reality hair value；

Timer module: connecting with control module, for setting the control period according to demand for control, comes when the control period When, it obtains Data Concurrent and send to control module, make control module that the data sent be combined to realize that corresponding control is grasped to module Make；

Memory module: for storing active power per minute hair Value Data, active power change rate threshold limit value number in fact According to active power controller target value；

Rolling amendment module: connecting with memory module, according to the period that setting rolls, makes active power change rate limit value number Covering is rolled according to periodic.

Further, it the system also includes the comparator module being connect with active power reality hair value detection module, is used for The real-time active power reality hair value at current time is compared with the active power reality hair value of last moment, and is tied according to comparing Grid entry point real power control target value is arranged in fruit.

It further, include being connect with grid entry point for receiving the active command value in grid entry point in the control module Data reception module.

It further, include being executed for sending control information in corresponding module in the control module Data transmission blocks.

It further, include being connect with data reception module in the control module, for the effective of received instruction The instruction judgment module that property is judged.

Further, a length of 1-5s when the interval of current time and last moment.

Further, the rolling period is 10-15min.

The present invention has the advantages that

1. controlling for active power of wind power field change rate, the side combined is detected using periodic adjustment and real-time bust Method can efficiently solve the out-of-limit problem of active power of wind power field change rate under various meteorological conditions.

2. by calculating 10 minutes active power change rate threshold limit value surpluses, 1 minute wattful power of rolling amendment in real time Rate change rate limit value can meet 1 minute active power change rate and active power change rate requirement in 10 minutes and most simultaneously Bigization wind power plant generated energy.

Detailed description of the invention

Fig. 1 is flow diagram of the invention.

Specific embodiment

To be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, below with reference to Specific embodiment, the present invention is further explained.

As shown in Figure 1, a kind of active power of wind power field change rate control system, the system comprises:

Wind power plant electric power assembly: guarantee the equipment that wind-power electricity generation is effectively run；

Control module: connecting with modules, is used for sending and receiving data, analyzes data, passes through data message control system Operation；

Grid-connected point module: booster stations high-voltage side bus or output aggregation point；

Active power change rate threshold limit value computing module: connecting with wind power plant electric power assembly, calculates for real-time monitoring The threshold limit value of active power change rate in wind power plant, and numerical value is sent to control module；

Active adjusting walking direction module: connecting with grid-connected point module, for judging active adjusting direction；

Active power reality hair value detection module: connecting with grid-connected point module, sends out in fact for detecting active power in grid entry point The situation of change of value, and active power control target value is arranged according to the situation of change of active power reality hair value；

Timer module: connecting with control module, for setting the control period according to demand for control, comes when the control period When, it obtains Data Concurrent and send to control module, make control module that the data sent be combined to realize that corresponding control is grasped to module Make；

Memory module: for storing active power per minute hair Value Data, active power change rate threshold limit value number in fact According to active power controller target value；

Rolling amendment module: connecting with memory module, according to the period that setting rolls, makes active power change rate limit value number Covering is rolled according to periodic.

In the present embodiment, the system also includes the comparator module being connect with active power reality hair value detection module, For the real-time active power reality hair value at current time to be compared with the active power reality hair value of last moment, and according to than Grid entry point real power control target value is arranged in relatively result.

It in the present embodiment, include being connect with grid entry point for receiving the active command in grid entry point in the control module The data reception module of value.

It in the present embodiment, include being held for sending control information in corresponding module in the control module Capable data transmission blocks.

It in the present embodiment, include being connect with data reception module in the control module, for received instruction The instruction judgment module that validity is judged.

In the present embodiment, a length of 1-5s when the interval of current time and last moment.

In the present embodiment, the rolling period is 10-15min.

In conjunction with above system, realize that the method for the present invention includes there are following steps:

Step 1: providing according to wind energy turbine set installed capacity and Grid-connection standards, and 1 minute active power of wind power plant is calculated and becomes Rate threshold limit value P_{chg_1min_max}With 10 minutes active power change rate threshold limit value P_{chg_10min_max}。

1 minute active power change rate threshold limit value P_{chg_1min_max}Calculation formula is as follows:

10 minutes active power change rate threshold limit value P_{chg_10min_max}Calculation formula is as follows:

Step 2: grid entry point active command value P is received_cmd, with grid entry point active power reality hair value P_meaCompare, judges active Adjust direction.

Further, the active method for adjusting direction is judged in the step 2 are as follows: if P_cmdGreater than P_mea, then direction is adjusted To rise；If P_cmdLess than P_mea, then direction is adjusted as decline.

Step 3: whether real-time detection grid entry point active power reality hair value occurs bust, when bust occurs, is immediately generated Grid entry point real power control target value P_target, it is transferred to step 5, otherwise, is transferred to step 4.

Further, the step 3 specifically comprises the following steps:

3a) according to 1 seconds interval, starts active power reality hair value bust and detect timer.

If 3b) active power reality hair value bust detects timer expiry, the detection timing of active power reality hair value bust is resetted Device.Calculate last moment (upper one second) grid entry point active power reality hair value P_{mea_last_sec}With current time (current second) grid entry point Active power reality hair value P_{mea_current_sec}Difference, be denoted as active power reality hair value slippage Δ P_{mea_sec}=P_{mea_last_sec}- P_{mea_current_sec}.Judge Δ P_{mea_sec}Whether P is more than or equal to_{chg_1min_max}, if it is greater than or equal to setting grid entry point real power control mesh Scale value P_target=P_{mea_current_sec}。

Step 4: setting control cycle T=1 minute has for rolling amendment 1 minute when each control interval time arrives Function power variation rate limit value, and generate grid entry point real power control target value P_target, it is transferred to step 5；If controlling interval time not It arrives, return step two.

Further, 1 minute active power change rate limit value of rolling amendment specifically comprises the following steps: in the step 4

4a) generate grid entry point active power reality hair value variable quantity array.

Calculate current time (current point) grid entry point active power reality hair value P_{mea_current_min}With last moment (upper one point) Grid entry point active power reality hair value P_{mea_last_min}Difference, be denoted as Δ P_{mea_min}=P_{mea_current_min}-P_{mea_last_min}.When simultaneously The active adjusting direction in site is when rising, to judge Δ P_{mea_min}Whether zero is greater than, if more than grid entry point active power reality hair value is taken Variable quantity P_{chg_1min}=Δ P_{mea_min}, otherwise, take P_{chg_1min}=0, by P_{chg_1min}It is stored in active power reality hair value variable quantity array In；When the active adjusting direction of grid entry point is decline, Δ P is judged_{mea_min}Whether less than zero, if being less than, grid entry point wattful power is taken Rate reality hair value variable quantity P_{chg_1min}=-Δ P_{mea_min}, otherwise, take P_{chg_1min}=0, by P_{chg_1min}It is stored in active power reality hair value In variable quantity array.Active power reality hair value variable quantity array preset length is 10, by the way of recycling storage, the 11st point First minute data of clock data cover, the 12nd minute data cover second minute data, and so on.

4b) grid entry point active power reality hair value variable quantity summation before calculating current time.

To first 10 minutes section, grid entry point active power reality hair value variable quantity summation only includes before current time One part, i.e., in active power reality hair value variable quantity array first data to current time k previous data it is cumulative WithTo second and later 10 minutes section, grid entry point wattful power before current time Rate reality hair value variable quantity summation consists of two parts, i.e., in active power reality hair value variable quantity array first data to it is current when Carve the cumulative of the previous data of k andAnd the latter data of current time k are to active In power reality hair value variable quantity array the last one data cumulative and

4c) calculate the surplus P of 10 minutes active power change rate threshold limit values_{chg_10min_remaining}, formula is as follows:

It is 4d) remaining according to 1 minute active power change rate threshold limit value and 10 minutes active power change rate threshold limit values Amount, corrects 1 minute active power change rate limit value P_step, formula is as follows:

Further, the method for grid entry point real power control target value is generated in the step 4 are as follows: judge that grid entry point is active Whether control target value is less than grid entry point active command value, if being less than, grid entry point real power control target value P is arranged_target= P_{mea_current_min}+P_step, until P_target=P_cmdUntil；Otherwise, grid entry point real power control target value P is set_target= P_{mea_current_min}-P_step, until P_target=P_cmdUntil.

Step 5: according to similar adjustment nargin principle, grid entry point real power control target value is divided between Wind turbines Match, and allocation result is sent to Wind turbines, return step two.

Similar adjustment nargin principle is to have carried out the distribution of work according to the active allowance size of Wind turbines, i.e., remaining active more , provide it is more active, it is remaining active few, provide few active.It can guarantee that every Wind turbines have similar in having in this way Function nargin.

Based on above-mentioned, the present invention is controlled for active power of wind power field change rate, using periodic adjustment and real-time bust The method combined is detected, the out-of-limit problem of active power of wind power field change rate under various meteorological conditions can be efficiently solved.It is logical It crosses and calculates 10 minutes active power change rate threshold limit value surpluses in real time, 1 minute active power change rate limit value of rolling amendment, 1 minute active power change rate and active power change rate requirement in 10 minutes can be met simultaneously and maximize wind power plant hair Electricity.

As known by the technical knowledge, the present invention can pass through the embodiment party of other essence without departing from its spirit or essential feature Case is realized.Therefore, embodiment disclosed above, in all respects are merely illustrative, not the only.Institute Have within the scope of the present invention or is included in the invention in the change being equal in the scope of the present invention.