Feed-forward power closed-loop regulation method and system based on active change rate

Abstract

The invention relates to the technical field of water turbine governor control, and discloses a feed-forward power closed-loop regulation method and system based on an active change rate, and the method comprises the steps: entering or exiting a feed-forward link according to the operation state of a water turbine generator set and the operation mode of a water turbine governor; the given power Pc issued by the hydropower station computer monitoring system is obtained, whether the given power Pc is a constant value or not is judged, if the given power Pc is the constant value, the feed-forward link is quitted, and if the given power Pc is the ramp function increase / decrease change, the feed-forward link is continued; and after entering a feed-forward link, limiting the change rate of the given power Pc, generating a feed-forward compensation amount based on a lead-lag control method, and carrying out feed-forward compensation on the output of the water turbine governor. According to the method, the active regulation speed can be effectively increased after the PID parameter of the water turbine governor is lowered, meanwhile, no safety risk is caused to stable operation of a power grid, the active regulation strategy of the water turbine governor is further perfected, and the AGC regulation performance of a unit is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water turbine governor control, and particularly relates to a feedforward power closed-loop regulation method and system based on active change rate. BACKGROUND

[0002] As the core control equipment of hydroelectric generating units, the water turbine governor plays an irreplaceable role in regulating unit frequency, achieving rapid synchronization and grid connection, and increasing and decreasing load. In practical applications, the water turbine governor is a highly coupled water-mechanical-electrical integrated control system, which has dead zone, time delay characteristics and non-minimum phase characteristics, and also needs to meet multiple constraint conditions such as actuator stroke, speed rise rate during load shedding, water pressure rise rate, and shutdown speed, which makes the research and optimization of the control strategy of the water turbine governor face many challenges.

[0003] With the rapid development of extra-high voltage power grids and the large-scale grid-connected operation of new energy, some regional power grids such as the Southwest Power Grid and the Yunnan Power Grid operate in an asynchronous manner with the main grid. These regional hydropower units have a huge installed capacity, and the water hammer effect generated by large-scale hydropower units during primary frequency regulation can cause ultra-low frequency oscillation in the grid, seriously threatening the safe and stable operation of the grid. To eliminate this risk, the industry generally reduces the active regulation speed by adjusting the PID parameters of the water turbine governor, which ensures the stability of the grid but significantly reduces the active regulation performance indicators of the AGC (Automatic Generation Control) of the unit.

[0004] CN116044645A discloses a water turbine generator set governor power feedforward control correction method, which directly generates the required control output according to the target power formed by the given power and the primary frequency signal and the current working water head, has faster regulation speed and no over-regulation phenomenon compared with feedback control, and corrects the feedforward control through feedback correction to make the feedforward control have self-learning function, so that the feedforward control can finally realize high-precision regulation. The present application is suitable for grid-connected control of water turbine governors. However, it does not optimize the scene of increased inertia and lag of the system after the PID parameters are adjusted, lacks a mechanism to limit the given power change rate, and may cause fluctuations during regulation; it is difficult to balance the regulation speed and stability under the condition of limited PID parameters, and cannot accurately solve the core problem of the decline of AGC active regulation performance.

[0005] CN117212037A provides a control system and method for optimizing water turbine speed regulation performance based on feedforward control, in which a PID speed regulator receives a guide vane opening error signal, and the error signal is processed through proportional The integral control adjusts and outputs a first guide vane opening degree instruction value to an electro-hydraulic servo system; when the load condition of the hydraulic turbine speed regulation system changes or the AGC instruction needs to adjust the power output, the feedforward control system obtains the difference between the current operating state quantity of the hydraulic turbine speed regulation system and the set reference operating condition state quantity and generates a second guide vane opening degree instruction value, which is output to the electro-hydraulic servo system; the electro-hydraulic servo system generates an output guide vane opening degree value according to the first guide vane opening degree instruction value and the second guide vane opening degree instruction value to control the guide vane action of the hydraulic turbine and the water diversion system; and the hydraulic turbine and the water diversion system drive the generator and the load to operate. However, the feedforward control only generates an instruction based on the difference between the operating state quantity and the reference condition quantity, without combining the active change rate to design a targeted compensation logic, so it cannot effectively deal with the problem of slow dynamic response after the PID parameter is adjusted to be low; the entering and exiting conditions of the feedforward link are not explicitly limited, so the feedforward may be started in non-adaptive conditions such as no-load operation and opening degree operation, which may affect the adjustment effect; and there is a lack of design for filtering high-frequency noise and inhibiting signal overshoot, so the adjustment stability is insufficient and it is difficult to meet the strict requirements in the asynchronous interconnection scenario of the power grid.

[0006] In summary, under the premise of meeting the requirements of primary frequency regulation performance in the asynchronous interconnection operation of the power grid, how to effectively improve the AGC active regulation performance of the unit and solve the problem of insufficient active regulation speed after the PID parameter is adjusted to be low has become an important topic in the research on the regulation strategy of the hydraulic turbine governor. SUMMARY

[0007] To solve the above problems, the present application provides a feedforward power closed-loop regulation method and system based on active change rate, which can effectively improve the active regulation speed after the PID parameter of the hydraulic turbine governor is adjusted to be low, without causing safety risks to the stable operation of the power grid, further improves the active regulation strategy of the hydraulic turbine governor, and improves the AGC regulation performance of the unit.

[0008] The technical scheme adopted by the present application is as follows: A feedforward power closed-loop regulation method based on active change rate, comprising: According to the operating state of the hydro-generator unit and the operating mode of the hydraulic turbine governor, the feedforward link is entered or exited; obtaining the given power P c of the hydroelectric power station computer monitoring system, and determining whether the given power P c is a constant value, if it is a constant value, the feedforward link is exited, and if it is a ramp function increasing / decreasing change, the feedforward link is continued; After entering the feedforward link, the change rate of the given power P c is limited, and a feedforward compensation quantity is generated based on the lead-lag control method to compensate the output of the hydraulic turbine governor.

[0009] Further, the entering or exiting the feedforward link according to the operating state of the hydroelectric generator set and the operating mode of the hydro-turbine governor comprises: when the hydroelectric generator set is in the grid-connected operating state and the hydro-turbine governor is in the power mode, entering the feedforward link; when the hydroelectric generator set is in the no-load operating state, the opening degree operating state or the tripped state of the outlet circuit breaker of the hydroelectric generator set, exiting the feedforward link.

[0010] Further, the limiting the change rate of the given power P c comprises: limiting the change rate of the given power P c to the actual change rate close to the load adjustment of the hydro-turbine governor, so as to make the power adjustment smooth and smooth.

[0011] Further, the generating the feedforward compensation based on the lead-lag control method comprises: generating the feedforward compensation through the series connection of the first-order inertia link and the first-order differential link according to the given power P c after the limiting of the change rate.

[0012] Further, the generating the feedforward compensation through the series connection of the first-order inertia link and the first-order differential link comprises: adjusting the amplitude of the feedforward compensation through the gain coefficient, and filtering the high-frequency noise and suppressing the signal overshoot through the time constant.

[0013] A feedforward power closed-loop regulation system based on active change rate comprises: a first judgment module configured to enter or exit the feedforward link according to the operating state of the hydroelectric generator set and the operating mode of the hydro-turbine governor; a second judgment module configured to obtain the given power P c issued by the computer monitoring system of the hydropower station, and judge whether the given power P c is a constant value, if so, exiting the feedforward link, if not, continuing the feedforward link; a feedforward compensation module configured to, after entering the feedforward link, limit the change rate of the given power P c , and generate the feedforward compensation based on the lead-lag control method, and perform the feedforward compensation on the output of the hydro-turbine governor.

[0014] Further, the entering or exiting the feedforward link according to the operating state of the hydroelectric generator set and the operating mode of the hydro-turbine governor comprises: when the hydroelectric generator set is in the grid-connected operating state and the hydro-turbine governor is in the power mode, entering the feedforward link; when the hydroelectric generator set is in the no-load operating state, the opening degree operating state or the tripped state of the outlet circuit breaker of the hydroelectric generator set, exiting the feedforward link.

[0015] Further, the limiting the change rate of the given power P c includes: limiting the change rate of the given power P c to the actual change rate close to the load adjustment of the hydro-turbine governor, so as to make the power adjustment smooth and smooth.

[0016] Further, the generating the feedforward compensation based on the lead-lag control method includes: generating the feedforward compensation through the series first-order inertia link and the first-order differential link according to the given power P c after the change rate is limited.

[0017] Further, the generating the feedforward compensation through the series first-order inertia link and the first-order differential link includes: adjusting the amplitude of the feedforward compensation through the gain coefficient, and filtering the high-frequency noise and suppressing the signal overshoot through the time constant.

[0018] The beneficial effects of the present application are: 1. The present application can solve the problem of insufficient active regulation speed after the PID parameter of the hydro-turbine governor is adjusted low without causing the risk of power grid ultra-low frequency oscillation, and can balance the power grid stability and the active regulation performance of the unit AGC (automatic generation control); at the same time, the active power of the unit can be monotonically and quickly tracked to the power set value, the change rate of the given power is limited to the actual load adjustment rate close to the regulation stability, and the feedforward link is only started when the unit is connected to the grid and the governor is in power mode (exit conditions such as no-load and opening degree operation), and the high-frequency noise is filtered and the signal overshoot is suppressed through the first-order inertia and differential link, which can improve the regulation reliability and stability.

[0019] 2. Compared with CN116044645A, the present application adds the given power change rate limit to avoid regulation impact, introduces the lead-lag control to offset the inertia lag to improve the PID dynamic response, and ensures that the feedforward only acts on the target working condition through the grid connection + power mode determination, which can accurately solve the AGC performance degradation problem.

[0020] 3. Compared with CN117212037A, the present application designs to adapt to AGC demand with active change rate as the core, has the functions of high-frequency noise filtering and signal overshoot suppression, and clearly exits the feedforward under the conditions such as no-load and opening degree operation, which can avoid invalid regulation and improve the regulation stability and adaptability. DETAILED DESCRIPTION

[0021] Figure 1 is a feedforward power closed-loop regulation method flow chart based on active change rate of embodiment 1 of the present application.

[0022] Figure 2 is a feedforward power closed-loop regulation method principle diagram based on active change rate of embodiment 2 of the present application. Detailed Implementation

[0023] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments are now described. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention; that is, the described embodiments are only a part of the embodiments of the invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0024] Example 1 like Figure 1 As shown, this embodiment provides a feedforward power closed-loop regulation method based on the rate of change of active power, including: Entering or exiting the feedforward loop depends on the operating status of the hydro-generator unit and the operating mode of the hydro-turbine governor. Obtain the given power P issued by the hydropower station's computer monitoring system. c And determine the given power P c If the value is constant, exit the feedforward loop; otherwise, continue the feedforward loop if the value is a ramp function increasing / decreasing. After entering the feedforward stage, the given power P is limited. c The rate of change is determined, and a feedforward compensation is generated based on the lead-lag control method to perform feedforward compensation on the output of the turbine governor.

[0025] It should be noted that the above-mentioned feedforward power closed-loop regulation method can flexibly control the start and stop of the feedforward link according to the actual operating conditions of the unit, and accurately compensate for the changing given power. This not only ensures the timeliness of power regulation response, but also avoids unnecessary regulation actions, thereby improving the operating efficiency and stability of the entire regulation system.

[0026] Preferably, the feedforward loop is entered when the hydro-generator unit is in grid-connected operation and the turbine governor is in power mode; the feedforward loop is exited when the hydro-generator unit is in no-load operation, open operation, or the unit's outlet circuit breaker is open.

[0027] Specifically, the unit status monitoring unit collects the operating status signals of the hydro-generator unit, including whether it is connected to the grid, whether it is unloaded, and whether the outlet circuit breaker is open. At the same time, the governor control unit obtains the governor's operating mode signal to determine whether it is in power mode. The collected status signals and mode signals are compared with preset conditions. If the combination of grid-connected operation and power mode is met, the feedforward link is triggered to start. If any one of the conditions of no-load operation, open operation, or circuit breaker opening is met, the feedforward link is triggered to close.

[0028] It should be noted that the above method realizes accurate control of the start-up time of the feedforward link, and only starts the feedforward when the unit is connected to the grid and the speed regulator targets power regulation, thereby avoiding invalid intervention in non-power regulation scenarios, reducing system redundant operation, and ensuring stable operation of the unit in different operating states.

[0029] Preferably, the rate of change of the given power Pc is limited to the actual rate of change of the water turbine governor load regulation, so as to make the power regulation smooth and smooth. Specifically, the actual rate of change characteristic of the water turbine governor in the load regulation process is obtained through test or actual operation data, and the rate range that can be stably responded is determined; based on the rate range, the rate of change of the given power Pc issued by the hydropower station computer monitoring system is constrained, so as to avoid the rate of change of the given power exceeding the actual regulation capacity of the governor, and to ensure that the change rhythm of the given power matches the regulation rhythm of the governor.

[0030] It should be noted that the above method can effectively avoid the problem that the given power changes too fast to cause the governor to respond in time, or changes too slowly to cause low regulation efficiency, so as to make the power regulation process smooth transition, reduce the fluctuation amplitude of the unit power, and reduce the impact on the power grid and the unit itself.

[0031] Preferably, according to the given power Pc after limiting the rate of change, a feedforward compensation quantity is generated through a series connection of a first-order inertia link and a first-order differential link. Specifically, the given power Pc after limiting the rate of change is taken as an input signal, which is first transmitted to the first-order inertia link for signal smoothing processing to weaken the sudden components in the signal; then the processed signal is transmitted to the first-order differential link to capture the change trend of the signal and predict the power regulation demand in advance; through the series operation of the two links, the smoothed signal basis and trend prediction information are integrated, and finally the feedforward compensation quantity that can accurately match the regulation demand is generated.

[0032] It should be noted that the series application of the first-order inertia link and the first-order differential link realizes the synergistic effect of advance compensation and lag filtering, which can not only respond to the power change demand in advance, but also filter invalid interference signals, thereby improving the accuracy and reliability of the feedforward compensation quantity and ensuring the accuracy of the governor output regulation.

[0033] More preferably, the amplitude of the feedforward compensation quantity is adjusted by a gain coefficient, and high-frequency noise is filtered and signal overshoot is suppressed by a time constant. Specifically, in the series operation of the first-order inertia link and the first-order differential link, a gain coefficient is introduced to calibrate the amplitude of the operation result, and according to the actual adjustment scene requirements, the value of the compensation quantity is amplified or reduced, so that the amplitude of the compensation quantity is adapted to the adjustment requirements of the governor; at the same time, a reasonable time constant is set, the high-frequency noise in the input signal is filtered through the time constant, the meaningless interference components are eliminated, and the change amplitude of the signal is limited to avoid the phenomenon of signal overshoot.

[0034] It should be noted that the introduction of the gain coefficient enables the feedforward compensation quantity to be flexibly adapted to different operating conditions, the setting of the time constant improves the purity of the signal, suppresses the influence of overshoot on the regulation system, further optimizes the feedforward compensation effect, and ensures the stability and accuracy of the regulation process.

[0035] Correspondingly, the embodiment also provides a feedforward power closed-loop regulation system based on active change rate, comprising: A first judgment module is configured to enter or exit the feedforward link according to the operating state of the hydro-generator set and the operating mode of the hydro-turbine governor; A second judgment module is configured to obtain the given power Pc issued by the computer monitoring system of the hydropower station c , and judge whether the given power Pc is a constant value, if so, exit the feedforward link, if not, continue the feedforward link; c A feedforward compensation module is configured to, after entering the feedforward link, limit the change rate of the given power Pc c , and generate a feedforward compensation quantity based on the lead-lag control method to perform feedforward compensation on the output of the hydro-turbine governor.

[0036] Specifically, the first judgment module acquires the operating state and mode information in real time by establishing data communication with the unit state monitoring device and the governor control unit, and outputs the start-stop instructions of the feedforward link after logical judgment; the second judgment module receives the given power Pc from the computer monitoring system of the hydropower station, judges the change type thereof through a signal recognition algorithm, and outputs the instructions of whether to continue the feedforward link according to the judgment result; after the feedforward link is started, the feedforward compensation module first performs the change rate limiting operation of the given power Pc, then generates the feedforward compensation quantity through the built-in lead-lag control algorithm, and finally transmits the compensation quantity to the output control end of the hydro-turbine governor.

[0037] ​It should be noted that the feedforward power closed-loop regulation system realizes the automation and precision control of feedforward power closed-loop regulation through the division and cooperation of the three modules. The functions of the modules are independent and highly efficient in cooperation, which can quickly respond to changes in operating state and given power, timely generate adaptive feedforward compensation, and effectively improve the stability and response speed of the power regulation of the hydro-generator unit.

[0038] Embodiment 2 This embodiment is based on Embodiment 1: As Figure 2 shown, the embodiment provides a feedforward power closed-loop regulation method based on active change rate, which includes: according to the unit operating state and the governor operating mode, controlling the switching of the feedforward function, when the given power P c is a constant value, the feedforward function is automatically removed, and the primary frequency modulation normally functions; when the given power P c increases / decreases in a ramp function, the Y pid of the governor power PID module is compensated in advance through a lead-lag correction parameter module to offset the inertial lag of the given power P c , effectively improving the dynamic response speed of the power PID regulation, so that the active power of the unit can monotonically and quickly track the power set value.

[0039] Correspondingly, the embodiment provides a feedforward power closed-loop regulation system based on active change rate, which includes: a slope rate module (LIMITER) for limiting the change rate of the given power Pc; a lead-lag correction parameter module; a first-order inertial link and a first-order differential link are combined into a feedforward compensation link with a transfer function G(s)=Ks / (Ts+1), which is used to offset the inertial lag of the given power P c and compensate in advance; a feedforward function automatic switching module for controlling the timing of the feedforward function; a feedforward multiplier (M) for superimposing the feedforward compensation output by the lead-lag correction parameter module on the Ypid calculated and output by the governor power PID module to achieve the purpose of accelerating the active regulation speed.

[0040] Preferably, in the feedforward function automatic switching module, when the unit governor is in no-load operation, opening degree operation or the unit outlet circuit breaker is in the tripped state, the feedforward function is removed by switching to the value 0 through the multiplier M and multiplying the feedforward correction parameter; when the unit is in grid-connected operation and the governor is in power mode operation, the feedforward function is put into operation by switching to the value 1 through the multiplier M and multiplying the feedforward correction parameter.

[0041] Preferably, in the ramp rate module, in order to match the actual rate of the hydro-turbine governor load adjustment, the ramp rate module is set to make the given power P c received by the governor change at a rate close to the actual rate of the hydro-turbine governor load adjustment, rather than in steps, so that the power adjustment can be more smooth and smooth, and at the same time prevent false alarm governor master follow-up failure and the like. The ramp rate module generally has two internal parameter variables, one is the setting range of the given power P c from 0 to P max , and the other is the change rate K, which is set to 1% P g / s (P g is the rated power of the unit) by default, and the range is 0~5% P g / s adjustable.

[0042] Preferably, in the lead-lag correction parameter module, a first-order inertia link and a first-order differential link are combined in series to form a feedforward compensation link, and the transfer function G(s)=Ks / (Ts+1), wherein the numerator Ks is a typical differential link (sensitive to the change rate of the input signal, and responds strongly to fast-changing signals), and the denominator Ts+1 is a first-order inertia link (filters high-frequency noise, introduces a time constant Ts lag, and avoids signal overshoot). The combination of the two has the characteristics of both the differential link and the inertia link. The time-domain step response presents the characteristics of rapid rise and slow approach to the steady-state value K - the output changes rapidly with time at the initial time (t→0) (differential characteristic), and then is gradually stabilized by the inertia link (inertial characteristic). The main parameter variables include the gain coefficient Ks and the time constant Ts, wherein the gain coefficient Ks is set to 0~10, and the default setting is 6; the time constant Ts is set to 0~1s, and the default setting is 0.1s.

[0043] Embodiment 3 This embodiment is based on embodiment 1: This embodiment provides a computer device, which includes a memory and a processor, the memory stores a computer program, and the processor implements the feedforward power closed-loop adjustment method based on active change rate of embodiment 1 when executing the computer program. The computer program can be in the form of source code, object code, executable file or some intermediate form, etc.

[0044] Embodiment 4 This embodiment is based on embodiment 1: The embodiment provides a computer readable storage medium, which stores a computer program. The computer program is executed by a processor to implement the active power change rate based feedforward power closed loop regulation method of the embodiment 1. The computer program can be in a source code form, an object code form, an executable file or some intermediate forms, etc. The storage medium includes any entity or device capable of carrying the computer program code, a recording medium, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal and a software distribution medium, etc.

[0045] The above only describes the preferred embodiments of the present application. It should be understood that the present application is not limited to the forms disclosed herein, and should not be considered as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concepts described herein by the above teachings or related art or knowledge. Any modification and change made by those skilled in the art without departing from the spirit and scope of the present application shall fall within the protection scope of the claims of the present application.

[0046] It should be noted that, for the foregoing method embodiments, in order to facilitate description, they are expressed as a series of action combinations, but those skilled in the art should know that the present application is not limited to the action sequence described, because according to the present application, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should know that the embodiments described in the specification all belong to preferred embodiments, and the actions and modules involved are not necessarily essential to the present application.

Claims

1. A feed forward power closed loop regulation method based on active change rate, characterized in that, The method comprises the following steps: According to the operation state of the hydroelectric generating set and the operation mode of the hydro-turbine governor, the feedforward link is entered or exited; Obtaining given power P issued by computer monitoring system of hydropower station c And judging whether given power P c Is constant value, if it is constant value, then exiting feedforward link, if it is ramp function increasing / decreasing change, then continuing feedforward link; After entering the feedforward link, the rate of change of the given power P c is limited, and a feedforward compensation amount is generated based on a lead-lag control method to perform feedforward compensation on the output of the hydro-turbine governor.

2. The feed forward power closed loop regulation method based on active variation of power according to claim 1, characterized in that, According to the operation state of the hydroelectric generating set and the operation mode of the hydro-turbine governor, the feedforward link is entered or exited, which comprises: When the hydroelectric generating set is in the grid-connected operation state and the hydro-turbine governor is in the power mode operation, the feedforward link is entered; When the hydroelectric generating set is in the no-load operation state, the opening degree operation state or the unit outlet circuit breaker tripping state, the feedforward link is exited.

3. The feed forward power closed loop regulation method based on active variation of power according to claim 1, characterized in that, The limiting given power P c The rate of change includes: limiting the given power P c The rate of change is brought close to the actual rate of change of the load regulation of the turbine governor, so that the power regulation is smooth and stable.

4. The feed forward power closed loop regulation method based on active variation of power according to claim 1, characterized in that, The feedforward compensation quantity generated based on the lead-lag control method comprises: generating the feedforward compensation quantity according to the given power P c by a first-order inertia link and a first-order differential link connected in series.

5. The feed forward power closed loop regulation method based on active variation of power according to claim 4, characterized in that, The feedforward compensation quantity is generated through the series connection of the first-order inertia link and the first-order differential link, which comprises: the amplitude of the feedforward compensation quantity is adjusted through the gain coefficient, and the high-frequency noise is filtered and the signal overshoot is suppressed through the time constant.

6. A feed forward power closed loop regulation system based on active change in power, characterized in that, The method comprises the following steps: The first judging module is configured to enter or exit the feedforward link according to the operation state of the hydroelectric generating set and the operation mode of the hydro-turbine governor; A second judging module is configured to acquire given power P issued by a computer monitoring system of a hydropower station c and judge whether the given power P c is a constant value, if yes, exit the feedforward link, if no, continue the feedforward link. The feedforward compensation module is configured to limit the given power P after entering the feedforward loop. c The rate of change is determined, and a feedforward compensation is generated based on the lead-lag control method to perform feedforward compensation on the output of the turbine governor.

7. A feed forward power closed loop regulation system based on active variation of power as claimed in claim 6, wherein, According to the operation state of the hydroelectric generating set and the operation mode of the hydro-turbine governor, the feedforward link is entered or exited, which comprises: When the hydroelectric generating set is in the grid-connected operation state and the hydro-turbine governor is in the power mode operation, the feedforward link is entered; When the hydroelectric generating set is in the no-load operation state, the opening degree operation state or the unit outlet circuit breaker tripping state, the feedforward link is exited.

8. A feed forward power closed loop regulation system based on active variation of power as claimed in claim 6, wherein, The limit of the rate of change of the given power P c includes: limiting the rate of change of the given power P c to the actual rate of change close to the load regulation of the hydro-turbine governor, and making the power regulation smooth and smooth.

9. A feed forward power closed loop regulation system based on active variation of power as claimed in claim 6, wherein, The feedforward compensation quantity generated based on the lead-lag control method comprises: generating a feedforward compensation quantity according to a given power P c by a first-order inertia link and a first-order differential link in series.

10. A feed forward power closed loop regulation system based on active power variation according to claim 9, characterized in that, The feedforward compensation quantity is generated through the series connection of the first-order inertia link and the first-order differential link, which comprises: the amplitude of the feedforward compensation quantity is adjusted through the gain coefficient, and the high-frequency noise is filtered and the signal overshoot is suppressed through the time constant.

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