89AbstractThe conventional PID control (linear) is popular control scheme that is used in almost pH control at waste water treatment process. pH model with respect to titration liquid flow rate has been known to be intrinsically difficult and nonlinear, especially when the process is conducted to non-linear range pH reference (pH 4-8), the settling time reach a long time. Therefore in this paper the nonlinear controller with self-tuning PID scheme is performed handle pH by training a neural-network based on backpropagation error signals. The pH process model is combination between CSTR (Continuous Stirred Tank Reactor) linear dynamic with H 3 PO 4 , HF, HCl, H 2 S flow rate and nonlinear static electro neutrality (wiener process model). The simulation result has a good and suitable performance under several tests (set-point and load change). The simulation result show the pH control system can follow the change of pH set-point and load with the average steady state error 0.00034. The settling time achieved at 50 second faster than conventional PID controller scheme.
B89Abstrak-Kebutuhan masyarakat terhadap listrik sangat meningkat dikarenakan semakin maraknya perangkat elektronik. Maka dari itu pemilihan PLTS sebagai alternatif karena indonesia merupakan negara yang berada di garis katulistiwa. Untuk menunjang kinerja PLTS dibutuhkan monitoring berbasis web untuk monitoring kinerja PLTS saat terjadi kerusakan. Dengan menggunakan sistem pemantauan nirkabel raspberry pi sebagai pengganti zigbee yang dirancang untuk menggantikan penggunaan kabel secara konvensional. Dari hasil analisa monitoring nilai rata-rata throughtput yang didapat adalah sebesar 0,60822047 Kbps. rata-rata nilai delay yang terjadi hanya bernilai 0,469370341 ms dengan packet loss yang didapat kan sebesar 0%. Efisiensi rata-rata PV array didapatkan sebesar 10% dan efisiensi sistem PV sebesar 4%. Dalam satu hari mendapatkan 4,26297 kWh, sedangkan Rp 1467,28 persatu kWh nya. Maka dalam segi ekonomi menghemat uang sebesar Rp 6254,965731 perharinya, Dan perbulannya menghemat sebesar Rp 187.648,9719. peramalan effisiensi rata-rata PV selama beroperasi sebesar 12%, sedangkan nilai effisiensi aktualnya 10%, kesalahan peramalan effisiensi sebesar 2%.Kata kunci-Photovoltaic, monitoring berbasis web, efisiensi.
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